1 SimGrid (3.32.1) not released yet (target december 22)
4 - Remove the MSG API: its EOL was scheduled for 2020.
5 - Remove the Java bindings: they were limited to the MSG interface.
6 - On Windows, you now need to install WSL2 as the native builds are now disabled.
7 It was not really working anyway.
8 - Support for 32bits architecture is not tested anymore on our CI infrastructure.
9 It may break in the future, but we think that nobody's using SimGrid on 32 bits.
12 - Activity::set_remaining() is not public anymore. Use for example
13 Comm::set_payload_size() to change the size of the simulated data.
14 - New function: Engine::flatify_platform(), to get a fully detailed vision of the
18 - optimize an internal datastructure, leading to a potentially big
19 performance gain (in particular with many detached comms)
22 - New option smpi/barrier-collectives to add a barrier to some collectives
23 to detect dangerous code that /may/ work on some MPI implems.
26 - Write the section of the manual about models, at least.
27 - WiFi: the total capacity of a link depends on the amout of flows on that link.
28 - Use the nonlinear callback feature of LMM to reflect this.
29 - Calibration values can be changed to match different MCS configurations
30 - See the example teshsuite/models/wifi_usage_decay/wifi_usage_decay.cpp
31 - See also "A Flow-Level Wi-Fi Model for Large Scale Network Simulation"
32 https://hal.archives-ouvertes.fr/hal-03777726
33 - Merge parameters network/bandwidth-factor and smpi/bw-factor that serve the same purpose.
34 - Same for the latency
35 - Rewrite the corresponding documentation.
36 - Allow to disable the TCP windowing modeling by setting network/TCP-gamma to 0.
37 - Finally kill the 'compound' host model. You can change the CPU or network model
38 with the default host model, as it should.
41 - Implement pthread_join in MC mode.
44 - New section in the user guide on the provided performance models.
45 - New section presenting some technical good practices for (potential) contributors.
46 - Add a section on errors and exceptions to the API documentation.
47 - Move the s4u examples to a section on their own to ease navigation.
49 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
50 (FG: issues on Framagit; GH: issues on GitHub)
51 - FG#18: Java bindings should be redone or removed
52 - FG!118: Wi-Fi callback mechanism
53 - FG!119: SMPI: add option to inject a barrier before every collective call
54 - GH#383: Segfault when adding a disk after load_platform(xml)
56 ----------------------------------------------------------------------------
58 SimGrid (3.32) October 3. 2022.
60 The Wiedervereinigung release. Germany was reunited 32 years ago.
63 - SimGrid now requires a compiler with C++17 support to compile the lib.
64 Our public headers still allow the user code to be compiled in C++14.
65 - Support graphviz v3 and ns-3 v3.36 (older versions are still supported).
66 - Tested with clang (v11, v13, v14 and v16), gcc (v7 to v13) and IntelCC v2022.2
70 - kill signal Comm::on_completion that was not working anyway.
71 - Expose signals Activity::on_suspend and Activity::on_resume
72 - New macro xbt_enforce(): similar to xbt_assert(), but throws an AssertionError
73 instead of calling abort().
74 - New: s4u::Exec::get_thread_count()
75 - Various cleanups around virtual machines:
76 - host_by_name() and friends now only return hosts. VMs are now excluded.
77 - It is now impossible to search a VM by name globally.
78 You can only search VM by name on a given PM, so either you know
79 the PM on which your VM runs and you can search by name, or you need
80 to manually iterate over all PMs to search this VM.
81 - The s4u::VirtualMachine constructor is now deprecated.
82 Please use s4u::Host::create_vm() instead.
83 - Rename s4u::VirtualMachine::on_creation() to on_vm_creation() to
84 avoid confusion with s4u:Host::on_creation() that is inherited.
85 Also s4u::VirtualMachine::on_destruction -> on_vm_destruction().
87 - One-sided communications (Comm::sendto) can now be detached,
88 and should now be more resilient to network and host faults.
91 - Added the following bindings / examples:
92 - Comm (now 100% covers the C++ interface):
93 - Comm.dst_data_size, Comm.mailbox, Comm.sender, Comm.start_time, Comm.finish_time
94 - Comm.state_str [examples: examples/python/comm-failure/, examples/python/comm-host2host/]
95 - Comm.remaining [examples: examples/python/comm-host2host/, examples/python/comm-suspend/]
96 - Comm.set_payload_size [example: examples/python/comm-host2host/]
97 - Comm.set_rate [example: examples/python/comm-throttling/]
98 - Comm.sendto, Comm.sendto_init, Comm.sendto_async [example: examples/python/comm-host2host/]
99 - Comm.start, Comm.suspend, Comm.resume [example: examples/python/comm-host2host/]
100 - Comm.test_any [example: examples/python/comm-testany/]
101 - Comm.wait_until [example: examples/python/comm-waituntil/]
103 - Engine.host_by_name [example: examples/python/comm-host2host/]
104 - Engine.mailbox_by_name_or_create [example: examples/python/comm-pingpong/]
106 - Mailbox: Mailbox.ready [example: examples/python/comm-ready/]
107 - Ptask [example: examples/python/exec-ptask/]:
108 - this_actor.exec_init
109 - this_actor.parallel_execute
112 - Added an AssertionError exception that may be thrown in case of error.
113 For instance, creating two hosts with the same name will now throw this exception
114 instead of killing the interpreter.
117 - Implement MPI_File_get_type_extent(), MPI_File_s/get_atomicity() and
118 MPI_File_get_byte_offset()
119 - Intercept getpid() calls to return the simulated ones.
120 - Fix various bugs in MPI IO.
122 Platform description & visualization:
123 - More robust sanity checks for platforms, to reject forbidden topologies with
124 a proper error message.
125 - New platform example: supernode.cpp and supernode.py.
126 The Python version generates a nice graphical representation of the platform.
127 - Bug fixes around fat-tree topologies.
128 - Allow to dump the platform topology as a CSV file representing the graph edges
129 with platform_graph_export_csv() (similar to the DOT export).
130 - Fix graphicator for "cluster" topologies (e.g. fat-tree, dragonfly).
133 - Fix a bug when using ptasks with multicores (FG!111).
136 - First bits of sthread, that intercepts pthread operations at runtime.
137 The intend is to use it together with simgrid-mc, but it is TBD.
138 - Sync MBI generators with upstream changes.
139 - Various cosmetics, small bug fixes and inner refactorings
141 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
142 (FG: issues on Framagit; GH: issues on GitHub)
143 - FG#105: "Variable penalty should not be negative!" with in-flight messages and bandwidth profiles
144 - FG#109: Application time reported by --cfg=smpi/display-timing:yes is wrong
145 - FG#110: Wait_any does not trigger new model solve when host events occur
146 - FG#111: Wrong execution time in rare cases when using multicore
147 - FG!98: Re-enable the tests for legacy stochastic profiles
148 - FG!109: Trigger new engine solve upon host events such as host on/off
149 - FG!116: SMPI/replay: Fix issue with recv of size =0
151 ----------------------------------------------------------------------------
153 SimGrid (3.31) March 22. 2022.
155 The ненасильство release. We stand against war.
157 Against the agression by a sick system that forces peoples to take arms against each other.
160 - Rework the internals, for simpler and modern code. This shall unlock many future improvements.
161 - You can now define plugins onto the DFS explorer (previously called SafetyChecker), using the
162 declared signals. See CommunicationDeterminism for an example.
163 - Support mutex, semaphore and barrier in DPOR reduction
164 - Seems to work on Arm64 architectures too.
165 - Display a nice error message when ptrace is not usable.
166 - New test suite, imported from the MPI Bugs Initiative (MBI). Not all MBI generators are integrated yet.
167 - Remove the ISP test suite: it's not free software, and it's superseeded by MBI.
170 - fix for FG#100 by ensuring small asynchronous messages never overtake larger
171 ones, conforming to the standard.
172 - replay: fix waitall behaviour to avoid forgetting requests and leaking
174 - tracing: ensure that we dump the TI traces continuously during execution and
175 not just at the end, reducing memory cost and performance hit.
176 - Update OpenMPI collectives selection logic to match current one (4.1.2)
177 - Add a coherence check for collective operation order and root/MPI_Op
178 coherence. Potentially costly so not activated unless smpi:pendantic is set
179 or -analyze is given.
182 - New signal: Engine::on_simulation_start_cb()
183 - Introduce a new execution mode with this_actor::thread_execute(). This simulate
184 the execution of a certain amount of flops by multiple threads ran by a host. Each
185 thread executes the same number of flops, given as argument. An example of this new
186 function can be found in examples/cpp/exec-threads.
187 - Reimplementation of barriers natively.
188 Previously, they were implemented on top of s4u::Mutex and s4u::ConditionVariable.
189 The new version should be faster (and can be used in the model-checker).
190 - Actor::get_restart_count(): Returns the number of reboots that this actor did.
193 - MSG_barrier_destroy now expects a non-const msg_barrier parameter.
195 New plugin: the Chaos Monkey (killing actors at any time)
196 - Along with the new simgrid-monkey script, it tests whether your simulation
197 resists resource failures at any possible timestamp in your simulation.
198 - It is mostly intended to test the simgrid core in extreme conditions,
199 but some users may find it interesting too.
202 - New solver for parallel task: BMF.
203 - More realistic sharing of heterogeneous resources compared to the fair
204 bottleneck solver used by ptask_L07.
205 - Implement the BMF (Bottleneck max fairness) fairness.
206 - Improved resource sharing for parallel tasks with sub-flows (parallel
207 communications between same source and destination inside the ptask).
209 - "--cfg=host/model:ptask_L07 --cfg=host/solver:bmf": enable the ptask
210 model with BMF solver.
211 - "--cfg=bmf/max-iterations: <N>": maximum number of iterations performed
212 by BMF solver (default: 1000).
213 - "--cfg=bmf/precision: <N>": numerical precision used when computing
214 resource sharing (default: 1e-12).
215 - This model requires Eigen3 library. Make sure Eigen3 is installed to use BMF.
218 - Modifications of the Profile mechanism, with some impact on users
219 - Addition of a new (S4U) method to init profiles from generic functions to improve versatility
220 - Fix initial behaviour of state_profiles
221 - Modify periodicity to behave like a period, and not like a loop delay
224 - Drop xbt_dynar_shrink().
227 - Made the following bindings static (previously member functions):
228 - Actor: Actor.kill_all(), Actor.by_pid()
229 - Host: Host.by_name(), Host.current(), Host.on_creation_cb()
230 - Mailbox: Mailbox.by_name()
231 - Added the following bindings:
232 - this_actor.warning()
233 - Mailbox.put_init() [example: examples/python/comm-waitallfor/]
234 - Comm.detach() [example: examples/python/comm-waitallfor/]
235 - Comm.wait_for() [example: examples/python/comm-waitfor/]
236 - Comm.wait_any_for()
237 - Comm.wait_all_for() [example: examples/python/comm-waitallfor/]
238 - Mutex [example: examples/python/synchro-mutex/]
239 - Barrier [example: examples/python/synchro-barrier/]
240 - Semaphore [example: examples/python/synchro-semaphore/]
243 - Remove target "make uninstall" which was incomplete and no longer maintained.
245 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
246 (FG: issues on Framagit; GH: issues on GitHub)
247 - FG#57: Mc SimGrid should test whether ptrace is usable
248 - FG#87: Smpi scripts fail with spaces in paths
249 - FG#100: [SMPI] Order of the message matching is not guaranteed
250 - FG#101: LGPL 2.1 is deprecated license
251 - FG#104: "make uninstall" not up-to-date
252 - GH#151: Missing mutexes for DPOR.
254 ----------------------------------------------------------------------------
256 SimGrid (3.30) January 30. 2022.
258 The Sunday Bloody Sunday release.
260 Main user-visible changes:
261 - The SimDag API for the simulation of the scheduling of Directed Acyclic
262 Graphs has been dropped. It was marked as deprecated for a couple of years.
263 We finally complete the implementation of what has been called SimDag++
264 internally, i.e., porting the different features of SimDag on top of S4U.
265 The new way to simulate the execution of dependent activities directly by
266 maestro (without any other actor) is details in the examples/cpp/dag-* series
268 - The removal of SimDag led us to also remove the export to Jedule files that
269 was tightly coupled to SimDag. The instrumentation of DAG simulation is still
270 possible through the regular instrumentation API based on the Paje format.
271 - We also dropped the old and clumsy Lua bindings to create platforms in a
272 programmatic way. It can be done in C++ in a much cleaner way now, which
273 motivates this suppression.
276 - Introduce on_X_cb() functions for all signals, to attach a new
277 callback to the signal X. The signal variables are now hidden and
278 only these functions should be used.
279 Rationale: this enables the usual deprecation scheme where functions
280 remain for 4 releases if we need to modify the signals, while the
281 current code with the signal variables directly visible prevents any
283 - New function: Engine::run_until(date), to split the simulation.
284 - New signal: Activity::on_veto, to detect when an activity fails to start.
285 - Signal change: Comm::on_start(Comm&, bool) has been replaced by
286 Comm::on_send and Comm::recv. These two signals respectively correspond to
287 when the sending or receiving side of a Comm is ready. They are raised at
288 the same locations as the former Comm::on_start signal.
289 - New function: Engine::track_vetoed_activities() to interrupt run()
290 when an activity fails to start, and to keep track of such activities.
291 Please see the corresponding example for more info.
292 - New functions: s4u::Comm::{sendto_init, set_source, set_destination} to enable
293 the use of vetoers with direct host-to-host communications. Both source and
294 destination have to set for a comm to start. Each call to these setters check
295 if all vetoes are satisfied. When it is the case, the comm starts. A use case of
296 these functions is given in examples/cpp/dag-scheduling.
297 - New functions: {Exec, Io}::update_priority allow you to modify the priority of
298 these kinds of activities during their execution. Behavior is detailed in
299 examples/cpp/io-priority/.
302 - Dynamic costs for MPI operations: New API to allow users to dynamically
303 change injected costs for MPI_Recv, MPI_Send and MPI_Isend operations.
304 Alternative for smpi/or, smpi/os and smpi/ois configuration options.
305 - Fix some issues with the replay mechanism.
308 - Function xbt::Extendable::get_data() is now templated with the type of the
309 pointee. Untyped function is deprecated. Use get_data<void>() if you still
310 want to retrieve void*.
313 - New section: "SimGrid MPI calibration of a Grid5000 cluster"
314 presenting how to properly calibrate MPI communications in SimGrid.
315 - Complete and reword the platform section, which is now completed.
318 - Thread contexts are used by default with Python bindings. Other kinds of
319 contexts revealed unstable, specially starting with pybind11 v2.8.0.
321 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
322 (FG: issues on Framagit; GH: issues on GitHub)
323 - FG#95: Wrong computation time for multicore execution after pstate change
324 - FG#97: Wrong computation time for ptask+multicore+pstates
325 - FG#98: SMPI offline simulation is inconsistent with the online simulation
326 (deadlocks / message truncation)
327 - FG#99: Weird segfault when not sealing an host
329 ----------------------------------------------------------------------------
331 SimGrid (3.29) October 7. 2021
333 The "Ask a stupid question" release.
335 We wish that every user ask one question about SimGrid to celebrate.
336 On Mattermost, Stack Overflow or using the issues tracker.
338 New modeling features:
339 - Non-linear resource sharing, modeling resources whose performance heavily degrades with contention:
340 - The total capacity may be updated dynamically through a callback
341 and depends mainly on the number of concurrent flows.
342 - Examples (both cpp and python): io-degradation, network-nonlinear, exec-cpu-nonlinear
344 - Dynamic factors: model variability in the speed of activities
345 - Each action can now have a factor that affects its progression.
346 This multiplicative factor is applied when updating the amount of work
347 remaining, thereby an activity with factor=0.5 only uses half of the
348 instantaneous power/bandwidth it is allocated and will appear twice
349 slower than what it actually consumes.
350 - This can be used to model a overhead (e.g., there is a 20 bytes
351 header in a 480 bytes TCP packet so the factor 0.9583) but the novelty
352 is this factor can now easily be adjusted depending on activity's and
353 resources characteristics.
354 - This existed for network (e.g., the effective bandwidth depends
355 on the message in SMPI piecewise-linear network model) but it is now
356 more general (the factor may depend on the source and destination and
357 thus account to different behaviors for intra-node communications and
358 extra-node communications) and is available for CPUs (e.g., if you
359 want to model an affinity as in the "Unrelated Machines" problem in
360 scheduling) and disks (e.g., if you want to model a stochastic
362 - For that, resources can be provided with a callback that computes
363 the activity factor when creating the action.
364 - Example: examples/cpp/exec-cpu-factors
365 - The same mechanism is also available for the latency, which
366 allows to easily introduce complex variability patterns.
369 - Added support to programmatic platform creation in Python.
370 Example: examples/python/clusters-multicpu
373 - Disk and Host now have a set_sharing_policy() too, for non-linear sharing.
374 This can only be set through the API, not through XML files.
378 - Multiple fixes to ensure reproducibility of tracing
379 - scan/excan can now be replayed
380 - wait action now uses ranks and not pid, as the other ones.
381 - smpi/init and smpi/finalization-barrier are now valid for replays.
382 - exit() is now intercepted by SMPI to avoid premature shutdown of
383 simulation. First non 0 return codes is returned as simulation return
387 * New section "Release Notes" documenting recent and current developments.
388 * New section "Modeling I/O: the realistic way" presenting how to properly model disks in SimGrid.
389 * Improvements in API Reference for C++ and Python interfaces.
392 - Make wifi creation compatible with ns-3 version 3.34 too.
394 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
395 (FG: issues on Framagit; GH: issues on GitHub)
396 - FG#77: Search feature of doc is broken (update sphinx theme version)
397 - FG#78: Multiple fixes for SMPI replay:
398 - TI tracing of allotallv/w was outputting wrong values
399 - MPI_LOGICAL in fortran is actually 32 bits wide, and not 8.
401 ----------------------------------------------------------------------------
403 SimGrid (3.28) July 14. 2021
405 The Victoriadagarna Release.
408 - C++ platform interface: Users can now describe their platform directly in C++.
409 This provides greatly flexibility and performance improvement for complex
410 platforms. Main features:
411 - Fat-Tree/DragonFly/Torus composing: allows you to create clusters of
412 "zones", instead of single hosts. This feature enables the description
413 of clusters with complex hosts, composed of several CPUs, GPUs, etc.
414 - StarZone: new zone with a Star-like topology. The routes are defined
415 as a set of links used to communicate from node to everybody (node<->ALL).
416 - Split-Duplex links: auxiliary method to create split-duplex links in
417 the platform, easing its utilisation. It automatically creates both UP
418 and DOWN links (similarly as done in XML).
419 - Please refer to the documentation and the examples included:
420 e.g. examples/cpp/clusters-multicpu/ and examples/platforms/*.cpp.
421 - New plugin: Producer-Consumer with monitor. Just requires to include the
422 include/simgrid/plugins/ProducerConsumer.hpp header to be used. See the
423 associated example (examples/cpp/plugin-prodcons).
426 - New: s4u::Comm::wait_all_for() (like s4u::Comm::wait_all, but with a timeout),
427 s4u::Io::wait_any(), s4u::Io::wait_any_for().
428 - Methods test_all/test_any/wait_all/wait_any in s4u now take their vector
429 parameter by reference, instead of a pointer.
430 - Fixed a bug where Activity::wait_for() killed the activity on timeout.
431 Explicitly cancel the activity to get back to previous behavior.
432 - New: Link::set_concurrency_limit() to limit the amount of concurrent flows.
435 - The default SMPI compiler flags are no more taken from the environment.
436 They can be explicitly set through cmake parameters SMPI_C_FLAGS,
437 SMPI_CXX_FLAGS, or SMPI_Fortran_FLAGS.
439 --cfg=smpi/finalization-barrier: which can be used to add
440 a barrier inside MPI_Finalize. This can help for some codes which cleanup
441 data attached to a process, but still used in other SMPI processes.
442 --cfg=smpi/errors-are-fatal: True by default, behaves like if MPI_ERRORS_RETURN
443 is active when set to false, to keep going after a small error
444 --cfg=smpi/pedantic: True by default. Do not report some harmless MPI errors
445 which may or may not be problematic in the end.
447 - fix behaviour, as maximum iteration count could be ignored
448 - add SMPI_SAMPLE_LOCAL_TAG and SMPI_SAMPLE_GLOBAL_TAG macros, to allow user to
449 use sampling when the same kernel is called with a different set of parameters
450 which have an impact on the timing.
451 - realloc is now intercepted, to be coherent, as malloc/calloc/free were already.
452 It should now work with smpi/auto-shared-malloc-thresh.
453 - Improve error handling and reporting in multiple places
454 - Improve correctness checks on the MPI code.(MPI_Op and MPI_Datatype
455 validity checks, truncated messages are now an error, return errors
456 when explicitely deleted handles are reused, ...)
457 - RMA: multiple fixes and stability improvements.
458 - analysis (-analyze flag in smpirun):
459 - SMPI can now report buffer leaks as well as MPI handles leaks,
460 if code was compiled without SMPI_NO_OVERRIDE_MALLOC.
461 - if -trace-call-location is used when compiling, SMPI can report
462 origin of leaked handles/buffers
463 - group leaks by type/origin in output message if possible
464 - New implemented MPI calls: MPI_Comm_test_inter
467 - Changed internal implementation of bandwidth factors in network models.
468 Models affected: CM02, LV08 (default), SMPI, IB.
469 Configuration affected: "network/bandwidth-factors" and "smpi/bw-factors".
470 Bandwidth factors are applied to communications to describe that users
471 cannot use 100% of the available bandwidth. For example, the default network model,
472 LV08, applies a factor of 0.97 to the bandwidth. In older versions, this
473 behavior was implemented by limiting the bandwidth available in the LMM
474 system for this flow. This may give the false impression that there is
475 bandwidth available for other flows due to its underutilization, especially
476 for the dynamic bandwidth factors used in SMPI models.
477 To avoid this, we have modified the implementation so that each flow uses the
478 maximum physical bandwidth according to the LMM system.
479 However, the actual throughput of the flow seen by the user is defined by
480 the physical bandwidth multiplied by the bandwidth factor.
481 This change impacts on the simulation results for all network models on
482 which we have bandwidth factors configured.
483 *****************************************
484 *DO NOT MIX 3.28 RESULTS WITH OLDER ONES*
485 *****************************************
486 This change may impact on the timing of your simulation results.
487 Take care when comparing simulations from different SimGrid's
488 versions. Sorry for the inconvenience.
489 - Dynamic network factors: users can configure a callback to define
490 the network factors dynamically. This API is available at
491 simgrid::kernel::resource::NetworkModelIntf.
492 - Users have access to complete information about the current communication
493 to decide which factor to apply. This includes: message size, source and
494 destination hosts, links and zones traversed.
495 - Dynamic factors for both latency and bandwidth.
496 - For more details, see the example in (examples/cpp/network-factors).
497 - Plugin host_energy: the "watt_off" and "watt_per_state" host properties,
498 deprecated since version 3.24, are no longer supported. Instead, use
499 "wattage_off" and "wattage_per_state".
502 - xbt_assert is not disabled anymore, even when built with enable_debug=off.
505 - New tutorial: Model-checking and formal assessment
506 - New sections: "Demystifying the routing" and "C++ platforms"
507 - Update and improve the part on visualization in MPI and Algo tutorials.
508 - Improve the section on routing: how to define it, how it's used internally
509 - Fix many issues, broken links and missing references in doxygen and Sphinx
512 - Lua platform files are deprecated. Their support will be dropped after v3.31.
515 - Legacy functions deprecated in this release: SIMIX_get_clock(), SIMIX_run().
517 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
518 (FG: issues on Framagit; GH: issues on GitHub)
519 - FG#47: Complete and fix tests from teshuite/s4u/activity-lifecycle
520 - FG#64: Configuring smpi/IB-penalty-factors
521 - FG#67: Running computation concurrently with MPI_Iallreduce
522 - FG#69: Tutorial misleading users of pre-v3.26 versions of SimGrid
523 - FG#71: Segmentation fault on invalid gw_src/gw_dst
524 - GH#322: Issue when an actor kills his host vm
526 ----------------------------------------------------------------------------
528 SimGrid (3.27) March 29. 2021
530 The Ragnar Release (anniversary of the siege of Paris by Vikings in 845)
532 Main user-visible changes:
533 - All functions marked as deprecated for one year were removed.
534 - Removed all that was related to the "Storage" type in all APIs and bindings.
535 "Disks" have been introduced more than a year ago to replace them for the better.
536 It's time to finish this replacement.
537 - SMPI ABI breaks from previous version: MPI global handles (predefined datatypes,
538 ops, COMM_WORLD) are now defined differently, and can be used in initializers,
539 avoiding "initializer element is not constant" errors with some codes. Please be
540 careful to recompile your MPI codes if switching to this new SimGrid version.
541 - Network model ns-3 now requires version ns-3.28 or higher.
542 - Removed some option aliases that were deprecated since v3.23 (June 2019)
543 - 'verbose-exit' is now 'debug/verbose-exit'
544 - 'simix/breakpoint' is now 'debug/breakpoint'
545 - 'clean-atexit' is now 'debug/clean-atexit'
548 - New functions: Comm::sendto_{init,async} to initiate a communication
549 on between two (possibly remote) hosts.
550 - Define new template functions Mailbox::get_unique(), returning a std::unique_ptr.
551 - Functions Mailbox::get() and Mailbox::get_async() are now templated with the
552 type of the pointee. Untyped functions are deprecated. Use Mailbox::get<void>()
553 or Mailbox::get_async<void>() if you really want to play with void*.
554 - Unify the interface of Activity::on_{start/activity}
555 - New function: Comm::get_dst_data()
556 - New function: Comm::set_payload_size() to set the amount of bytes to simulate.
559 - ptask should now work better with multicore hosts (FG#37).
560 - Internal cleanups and refactoring around activities, to prepare for SimDAG++.
561 - Internal cleanups and refactoring around models, to prepare for programmatic
563 - Modernize our tests of the performance models
567 - New section: Configuring the logs from the command line.
568 - New section: Programming API of logs.
569 - New section: Getting realistic results
570 - New section: Examples of SMPI Usage
571 - New part: SimGrid's Internals, with a section on Design goals
572 - Move back to the classical Breathe tool chain, and fix many small glitches.
575 - Handle leak checking: SMPI will now display a message if MPI handles are still
576 present at the end of a simulation. Option smpi/list-leaks:n will display the n
577 first leaked pointers and their types.
578 - smpi/display-allocs option : Display Memory allocations analysis, with hints
579 about the largest allocations. This only works for allocations with malloc/calloc
580 and not compiled with SMPI_NO_OVERRIDE_MALLOC
581 - "-analyze" option in smpirun will activate smpi/display-allocs and smpi/display-timing
582 - New implemented MPI calls: MPI_File_set_size, MPI_Aint_add, MPI_Aint_diff,
583 MPI_Type_get_extent_x, MPI_Type_get_true_extent_x, MPI_Status_set_elements_x
584 - Support for MPI C++ datatypes (MPI_CXX_BOOL, MPI_CXX_FLOAT_COMPLEX,
585 MPI_CXX_DOUBLE_COMPLEX, MPI_CXX_LONG_DOUBLE_COMPLEX)
586 - Replay now opens and parses the trace file only once for all ranks when possible.
588 - better handling of MPI_PROC_NULL
589 - MPI_Group_incl was broken in some cases
590 - PAPI tracing now fixed
591 - MPI_Errhandlers are properly handled for MPI_COMM_WORLD
592 - SMPI will now fail properly when receive size < sent size, instead of
593 just setting MPI_ERR_TRUNCATE and keep going.
594 - Proxy Apps ( https://framagit.org/simgrid/SMPI-proxy-apps ):
595 - Remove useless build patches and split build/run patches on the page
596 - Build in parallel when possible
597 - Test on yum-based systems
598 - New nightly tested Proxy-apps:
599 - OpenMPI mpi-test-suite
600 - Coral MCB, LSMS, Qbox, CLOMP
601 - ECP/Mantevo Cloverleaf3D, Ember
602 - Codevault bhtree_mpi
605 - Only initialize the Dwarf parser when needed, saving 10 seconds in most cases.
606 - Start to overhaul the implementation to modernize it (still ongoing).
609 - Drop simgrid::xbt::demangle(). Please use boost::core::demangle() instead.
610 - Drop xbt_dynar_cursor_rm(), xbt_dynar_search_or_negative(),
611 xbt_str_split_quoted(), xbt_str_split_quoted_in_place().
612 - Deprecate xbt_dynar_to_array().
613 - When an exception occurs in kernel mode, display both the actor and kernel stacks.
615 C binding and interface:
616 - Rename (lowercase) functions sg_actor_get_PID, sg_actor_get_PPID, sg_actor_by_PID.
617 - Constness requirement has been lowered for parameter argv of sg_actor_start()
618 and sg_actor_create() It's now (char* const*). The previous version is still
619 available as sg_actor_start_() and sg_actor_create_().
621 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
622 (FG: issues on Framagit; GH: issues on GitHub)
623 - FG#37: Parallel tasks are limited to 1 core per host
624 - FG#62: Running "smpirun -replay" on large networks
625 - FG!46: Fix a few potential memory leaks in SMPI colls
626 - GH#343: Wrong consumed energy when an exec timeouts
628 ----------------------------------------------------------------------------
630 SimGrid (3.26) December 15. 2020
632 The Release release (the French lockdown was eased today).
634 Important user-visible changes:
635 - SimGrid now requires a compiler with C++14 support.
636 Sibling projects should upgrade their FindSimgrid.cmake
637 - Surf precision default value is now 1e-9, instead of 1e-5. This was changed as
638 several users had difficulties to understand issues when using high bandwidth or
639 small latency events. The new value was already the default for SMPI and
640 should not cause too much performance hit. It can change some simulation
641 timings if simulation was skipping a lot of small events (which was actually
642 an issue per see). The old value can be restored with --cfg=surf/precision:1e-5.
643 - On some network models (L07, CM02, LV08), an implicit loopback link is created
644 for local communication. Default bandwidth was 500MBps and latency was 15µs,
645 which was rather bad. Default values have been changed to 10GBps and 0 latency.
646 Options network/loopback-lat and network/loopback-bw have been added to adapt
647 these values if needed. Network and routing models already providing separate
648 loopbacks (clusters and such) are not impacted by this change.
649 - SMPI now adds 16 bytes of header to each message sent, in order to simulate
650 metadata that are added to each MPI message by MPI libraries (tag,
651 src/dest, and communicator information). This may change simulation times
652 for very small message sizes, but should be more realistic.
655 - New routing 'WiFi' that makes it easier to specify a wifi network zone.
656 - New plugins: wifi_energy and link_load. See the associated examples.
657 - New examples: wifi networks, and communication suspend.
660 - LTO is now enabled for Intel/clang compilers.
661 - LTO behavior on GCC can be parameterized using LTO_EXTRA_FLAG in cmake.
662 Setting it to "auto" will use all available cores, while setting it to n will
663 use n cores to speedup link step (usage: cmake -DLTO_EXTRA_FLAG=4).
664 - Remove obsolete runtime option 'contexts/parallel-threshold'.
665 - Runtime option 'tracing/msg/process' renamed to 'tracing/actor'. The old name
666 has been kept for compatibility.
667 - Finally remove obsolete snake_case() aliases for runtime options.
668 - Further improve the documentation.
671 - the on_exit() of each actor is also executed when the simulation deadlocks.
672 - New functions: s4u::Activity:: suspend(), resume() and is_suspended()
673 An example is provided for s4u::Comm but it should work with Exec and Io.
676 - Update proxy apps coverage of new ECP apps: 60+ apps now tested nightly on
677 https://framagit.org/simgrid/SMPI-proxy-apps
678 - MPI/IO: supports names starting with "./"
679 - Fortran: many MPI/IO bindings, support for MPI_UB/LB, C MPI_INT/FLOAT/DOUBLE
681 - smpicc/cxx/ff/f90 now will actually perform definition checks at link time. When
682 building shared libraries, this may cause issues, so environment variable
683 SMPI_NO_UNDEFINED_CHECK can be added to disable this.
684 - most temporary files should now be created in /tmp dir (or equivalent).
685 If this one does not allow execution of code (noexec flag), this may cause issues.
686 Please use another tmp directory (using TMPDIR or equivalent system variable)
690 - A large refactoring is ongoing, but this should be transparent for users so far.
693 - Drop xbt_str_split().
695 C binding and interface:
696 - The return type of the sg_actor_on_exit() callbacks is now 'void'
697 (int value was previously ignored)
698 - Many C functions were renamed to follow a common naming style
699 (sg_object_get_something and sg_object_set_something). As usual, the deprecated
700 names are kept until version 3.30.
701 - Many MSG tests were converted to the new S4U's interface in C, that
702 was extended for that.
704 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
705 (FG: issues on Framagit; GF: issues on GForge; GH: issues on GitHub)
706 - FG#41: Add sg_actor_create C interface
707 - FG#43: xbt::random needs some care
708 - FG#48: The Impossible Did Happen (yet again)
709 - FG#50: Suspending an actor executed at the current timestamp fails
710 - FG#52: Zero-seconds timeout : "That's in the past already"
711 - FG#53: Crash while using ns-3 network model
712 - FG#54: How to suspend a comm?
713 - FG!22: Stochastic Profiles
714 - FG!24: Documentation and fix for xbt/random
715 - FG!35: Add a modeling hint for parallel links in doc
716 - FG!36: [xbt/random] Read/Write the state of the RNG
717 - FG!42: Link cumulated load plugin
718 - FG!44: Test condition variable wait_until+notify_all
719 - GF#18137: Allow different stack sizes?
720 - GH#128: Parallelization of simulation with --cfg=contexts/nthreads
721 - GH#139: Allow pthread creation in SMPI
722 - GH#336: Packet-level simulation using SMPI?
723 - GH#345: Error in the LMM while migrating a VM
724 - GH#346: [SMPI] error while loading shared libraries: libsimgrid.so
725 - GH#352: pip install / python setup.py install fail to find pybind11
726 - GH!337: Fix link_energy plugin for wifi platforms
727 - GH!339: Add Mailbox set_receiver method to python binding
728 - GH!344: Cast hugepages macros parameters to int64
730 ----------------------------------------------------------------------------
732 SimGrid (3.25) February 2. 2020 (aka 02 02 2020)
734 The Palindrom Day Release.
736 Important user-visible changes:
737 - Improve the Python usability (stability and documentation).
738 - A nasty synchronization bug was ironed out, see also below.
739 - Python's doc was organized as a separate tree, now integrated with C++.
740 - C bindings of S4U were not part of the doc.
741 - The C++ doc was also improved as methods are now split by theme.
742 - Further deprecate MSG: you now have to pass -Denable_msg=ON to cmake.
743 - This is mandatory to use the Java bindings.
744 - OFF by default; The plan is to completely remove MSG by 2020Q4 or 2021Q1.
745 - SimDAG++: Automatic dependencies on S4U activities (experimental)
746 - Some features are already implemented but not all of them
747 - Cannot block an activity until it's scheduled on a resource
748 - No heterogeneous wait_any() that would mix Exec/Comm/Io activities.
749 - See examples/s4u/{io,exec,comm}-dependent for what's already there.
752 - Upgrade documented Java dependency to Java 8 (earlier versions don't work).
753 - Drop support for Viva/Triva (old visualization tools), hence removed
754 TRACE_get_node_types() and TRACE_get_edge_types() functions.
757 - Require pybind11 version 2.4.
758 - Greatly improve locking during context switches with Python.
759 - Declaring Python callbacks to this_actor::on_exit is now working.
760 - No more tests are failing currently, even on win32.
763 - Actor: Merge signals on_migration_start/end into on_host_change
764 - Actor: Rename migrate() into set_host()
765 - Disk: Allow users to get the read and write nominal bandwidth values
766 - Exec: Implement wait_for(timeout)
767 - Io: Implement wait_for(timeout)
770 - Parse errors now raise a simgrid::ParseError that you may want to catch.
773 - In simgrid::kernel::resource::Model, the methods next_occuring_event*() have
774 been renamed to fix a spelling error. As usual, the previous definitions are
775 kept with a deprecation warning. However, to avoid runtime errors, it is now
776 forbidden to override these deprecated methods in a derived class. Please use
777 the new names immediately if you need to override them.
780 - Remove unused parameter 'free_ctn' for xbt_dict_set() and xbt_dict_set_ext().
781 - Drop unused functions for dicts and dynars: xbt_dict_cursor_get_elm,
782 xbt_dict_get, xbt_dict_get_elm, xbt_dict_get_ext, xbt_dict_get_key,
783 xbt_dict_remove, xbt_dict_reset, xbt_dynar_compare, xbt_dynar_dump,
784 xbt_dynar_foreach_ptr, xbt_dynar_free_data, xbt_dynar_free_voidp,
785 xbt_dynar_init, xbt_dynar_insert_at_as, xbt_dynar_merge,
786 xbt_dynar_remove_n_at, xbt_dynar_replace, xbt_dynar_search, xbt_dynar_set.
787 - New module: random, providing classical random numbers generators.
790 - New option : "smpi/auto-shared-malloc-thresh" which sets a value for
791 allocations' size above which they are considered "shared" by default (as if
792 they were performed through SMPI_SHARED_MALLOC macros).
793 Default = 0 = disabled feature.
794 Note : malloc, calloc and free are now overridden by smpicc/cxx by default.
795 This can cause some troubles if codes are already overriding these. If this
796 is the case, defining SMPI_NO_OVERRIDE_MALLOC in the compilation flags can
797 help, but will make this feature unusable.
798 - Input check is now performed much more consistently and outputs precise
799 warnings for each error found
800 - New supported calls : MPI_File_set_view, MPI_File_get_view
801 - MPI I/O now only supports disks, as storage is discontinued.
802 - MPI I/O allows opening files without specifying absolute path
803 - Note : SMPI configuration options are now initialized by smpi_init_options()
804 call, which should be called if SMPI is not being used through smpirun.
806 Fixed bugs (FG#.. -> framagit bugs; FG!.. -> framagit merge requests):
807 - FG#9: Python bindings crashing
808 - FG#39: Missing s4u::Comm::wait_any_for example
809 - FG#42: Add support for ThreadSanitizer (TSan)
810 - FG!19: Removing RngStream
811 - FG!20: A module for RNG calls
812 - FG!21: Choice between ad-hoc and standard distributions implementations
814 - FG!25: Fix link in Mutex doc
815 - FG!26: Fix links in SMPI interface doc
816 - GH#31: [MC] please provide an option to make MPI_Send asynchronous
817 - GH#305: Unscheduled tasks are still excuted
818 - GH#313: smpirun: manual outdated w.r.t. --help
819 - GH#321: [S4U] Get task remaining work ratio
820 - GH#323: Crash when an actor turn off his physical host
821 - GH#335: Missing links on dragonfly example svg
822 - https://lists.gforge.inria.fr/pipermail/simgrid-user/2019-November/004653.html:
823 MPI_Cart_sub was not working properly. Kudos to Jonathan Borne for the report.
825 ----------------------------------------------------------------------------
827 SimGrid (3.24) October 9. 2019
829 The Clean Disk Release.
832 - Introduce a s4u::Disk interface to manage the newly introduced <disk>
833 tag. s4u::Disk is called to supplant s4u::Storage in a near future. It
834 thus becomes the default resource to execute I/O operations. Examples
835 and the file system plugin have been modified to use disks instead of
836 storage elements. Storage can still be used but is doomed to disappear.
837 Users are thus adviced to update their simulators accordingly.
838 - Barrier::wait returns SG_BARRIER_SERIAL_THREAD for (only) one actor
839 for consistency with pthread_barrier_wait()
840 - Host::get_englobing_zone() returns the englobing netzone
841 - Actor::on_destruction is now called in the destructor
842 Actor::on_termination new signal called when the actor terminates
844 - Global signals are now part of the Engine:
845 - on_platform_creation: after config settings, before the XML parsing
846 - on_platform_created: right after the XML parsing
847 - on_time_advance: each time the clock advances
848 - on_simulation_end: after simulation, before cleanups
849 - on_deadlock: as the name implies.
851 - sg_{actor,host,link}_{data,data_set}() now all exist.
852 Use them to attach user data to the object and retrieve it.
855 - Introduce an experimental Wifi model. It sounds reasonable
856 according to the state of the art, but it still has to be properly
857 validated, at least against ns-3 if not against reality.
858 - Improved the usability of ns-3. Several bugs were ironed out.
859 - host_energy: Wattage was expressed as 'idle:oneCore:allCores'.
860 It is now expressed as 'idle:epsilon:allCores' to properly model the
861 consumption of non-whole tasks on mono-core hosts. More info in the doc.
864 - convert a new set of functions to the S4U C interface and move the old MSG
865 versions to legacy (MSG_process_self*, MSG_process_{un}ref, ...)
868 - Fortran bindings for DVFS have been removed.
869 - Add support for MPI_Irsend, MPI_Rsend, MPI_Rsend_init, MPI_Bsend,
870 MPI_Ibsend, MPI_Bsend_init, MPI_Buffer_attach, MPI_Buffer_detach
871 - SMPI can now be selected by cmake's find_module(MPI) with
872 MPI_C_COMPILER, MPI_CXX_COMPILER, MPI_Fortran_COMPILER variables.
873 - Add support for MPI Errhandlers in Comm, File or Win. Default errhandler is now
874 MPI_ERRORS_ARE_FATAL, so codes which were sending warnings may start failing.
875 - trace-call-location can be used with TI traces, and replayed, and is compatible
876 with smpi/comp-adjustment-file.
877 - sleep events are now correctly traced/replayed.
878 - Default for trace-call-location is now to use file names and not full paths.
879 To revert to previous behavior (in case of collision of filenames), option
880 "smpi/trace-call-use-absolute-path" can be set to yes.
883 - Use the included xxHash as an hash implem when C++14 is usable.
884 - Option model-checker/hash was removed. This is always activated now.
885 - New option smpi/buffering controls the MPI buffering in MC mode.
886 - MPI calls now MC_assert() that no MPI_ERR_* code is returned.
887 This is useful to check for MPI compliance.
890 - New section on plugins: how to define a new one, and existing ones.
893 - xbt_mutex_t and xbt_cond_t are now marked as deprecated, a new C interface
894 on S4U is already available to replace them by sg_mutex_t and sg_cond_t.
897 - Introduce the <disk> tag as a replacement of the <storage>, <storage_type>,
898 and <mount> tags. The rationale is finish to decouple what should be handle
899 by SimGrid kernel (i.e., resources and activities) from plugins built in
900 user space (e.g., the file system plugin). This new tag currently accepts
901 only three attributes (id, read_bw, and write_bw). All the other information
902 that was declared with the storage related tags now has to be expressed as
903 properties. An example of platform using this new tag is available at
904 examples/platforms/hosts_with_disks.xml
907 - 'expect signal' can now accept more than one potential signal.
909 Fixed bugs (FG#.. -> framagit bugs; FG!.. -> framagit merge requests):
910 - FG#28: add sg_actor_self (and other wrappers on this_actor methods)
911 - FG#29 and FG#33: provide a new C API to mutexes and condition variables
912 - FG#30: convert MSG_process_{un}ref to sg_actor_{un}ref
913 - FG#31: per-actor data
914 - FG#34: SG_BARRIER_SERIAL_THREAD?
915 - FG#35: model-checker does not like buster-produced binaries
916 - FG!13: MC: complete workaround in the error msg seen on modern systems
917 - FG!15: execute_flops now logs compute
918 - FG!16: Fix the ns-3 bindings when several flows are simultaneously finishing
919 - FG!17: ns-3: unblock the right number of communications + others issues
920 - FG!18: Improving the performance of the ns-3 bindings
921 - GH#189: Energy consumption of parallel tasks
922 - GH#219: Error in the throughput of TCP transfer
923 - GH!330: Minor polishing of English: Configuring_Simgrid
924 - GH!331: Fix a doc error about actors (Tutorial_algorithms)
925 - GH!332: Add '-O0' flag for: cmake -DCMAKE_BUILD_TYPE=Debug
926 - GH!334: Rework energy plugin, again
928 ----------------------------------------------------------------------------
930 SimGrid (3.23.2) July 8. 2019
933 - Nicer introduction page.
934 - Migrate the "Deploy your application" page to the new doc.
935 - Move Java as a subtree of MSG.
938 - Rename simgrid::TimeoutError to simgrid::TimeoutException.
941 - Drop xbt_dynar_sort_strings().
944 - Really fix FG#26: Turning off a link should raise NetworkFailureException
945 - FG#27: Wrong exception thrown to wait_any when link is turned off
946 - GH#328: Java: Canceling multiple tasks in a single vm/host
948 ----------------------------------------------------------------------------
950 SimGrid (3.23) June 25. 2019
952 The Exotic Solstice Release.
955 - SunOS and Haiku OS support. Because exotic platforms are fun.
956 - Stop setting random seed with srand48() at initialization.
957 - Use addr2line as a fallback for stacktraces when backtrace is not available.
958 - Build option -Denable_documentation is now OFF by default.
959 - Network model 'NS3' was renamed into 'ns-3'.
962 - Simgrid can now hopefully be installed with pip.
965 - wait_any can now be used for asynchronous executions too.
968 - New log appenders: stdout and stderr. Use stdout for xbt_help.
969 - Drop xbt_dict_dump.
972 - SMPI now reports support of MPI3.1. This does not mean SMPI supports all MPI 3 calls, but it was already the case with 2.2
973 - MPI/IO is now supported over the Storage API (no files are written or read, storage is simulated). Supported calls are all synchronous ones.
974 - MPI interface is now const correct for input parameters
975 - MPI_Ireduce, MPI_Iallreduce, MPI_Iscan, MPI_Iexscan, MPI_Ireduce_scatter, MPI_Ireduce_scatter_block support
976 - Fortran bindings for async collectives.
977 - MPI_Comm_get_name, MPI_Comm_set_name, MPI_Count support.
980 - Remove option 'model-check/record': Paths are recorded in any cases now.
981 - Remove option 'model-check/sparse-checkpoint': Checkpoints are now
982 always sparse. That's an immense gain in memory, and can even be
983 faster because of cache effects. So there is no need to clutter the
984 code to allow the user to go for the unefficient mode.
987 - Remove the lagrange-based models (Reno/Reno2/Vegas). The regular
988 models proved to be more accurate than these old experiments.
990 Fixed bugs (FG=FramaGit; GH=GitHub -- Please prefer framagit for new bugs)
991 - FG#1: Broken link in error messages
992 - FG#2: missing installation documentation
993 - FG#3: missing documentation in smpirun
994 - FG#6: Python bindings not available on PyPI
995 - FG#7: simple cmake call requires doxygen
996 - FG#8: make python bindings an optional dependency
997 - FG#10: Can not use MSG_process_set_data from SMPI any more
998 - FG#11: Auto-restart actors forget their on_exit behavior
999 - FG#12: -Denable_lto=OFF doesn't disable LTO
1000 - FG#13: Installs unstripped file 'bin/graphicator'
1001 - FG#14: Installs the empty directory 'doc/simgrid/html'
1002 - FG#15: Setting -Denable_python=OFF doesn't disable the search for pybind11
1003 - FG#17: Dead link in doc (pls_ns3)
1004 - FG#20: 'tesh --help' should return 0
1005 - FG#21: Documentation link on http://simgrid.org/ broken
1006 - FG#22: Debian installation instruction are broken
1007 - FG#26: Turning off a link should raise NetworkFailureException exceptions
1008 - GH#133: Java: a process can run on a VM even if its host is off
1009 - GH#320: Stacktrace: Avoid the backtrace variant of Boost.Stacktrace?
1010 - GH#326: Valgrind-detected error for join() when energy plugin is activated
1012 ----------------------------------------------------------------------------
1014 SimGrid (3.22) April 1. 2019
1016 The Easter Christmas Release (this one is somewhat late).
1019 - We are excited to introduce the SimGrid/S4U interface to your neighborhood
1020 - Not complete yet: asynchronous activities (amongst others) are still missing
1021 - Still ongoing: the interface may change in the future. We need more
1022 testers! Please report any glitches.
1023 - No new project using Java should start now. Please switch to Python.
1026 - Some of the internal cleanups may lead to speed improvements:
1027 - The hard limitation on the amount of simulated actors with
1028 Java+Mac was removed. Now, the available memory is the only limit.
1029 - Our refcounting was tidyied, leading to 10% speedups in some cases.
1030 - We are still working on making our code robust to the actor kills
1031 and hosts' churn. Things are improving, but it's not perfect yet.
1032 - Replaced our own code to display a backtrace (that was forking addr2line)
1033 with the Boost.Stacktrace library.
1034 You won't see your backtraces without this optional dependency.
1035 - Bump cmake dependency to 3.5 (provided by Ubuntu 16.04).
1036 - Stop setting random seed with srand() at initialization.
1039 - In <host> and <peer>, 'availability_file' is now 'speed_file'.
1040 XML file version remains 4.2 since old files are still compatible.
1043 - Process termination which was broken at version 3.21 has been repaired.
1044 - Expose host load plugin: loadInit, getCurrentLoad, getComputedFlops, getAvgLoad
1045 - Hide the examples into examples/deprecated. New users should use Python.
1048 - Drop MSG_process_create_from_stdfunc() from the API.
1049 This C++ function was a pimple in the C API, made necessary at some
1050 point by the Java bindings. This is fixed now.
1051 - Hide the examples into examples/deprecated. New users should use S4U.
1052 - MSG_process_create and MSG_process_attach now crash if the host used
1053 to run this process is off.
1054 - Fix the protype of MSG_process_on_exit()
1055 Now use (int,void*) callbacks instead of (void*,void*) ones.
1056 The implementation was ways too messy to actually work, I guess.
1059 - Change the way SMPI_SAMPLE_* macros work to avoid invalidating cache
1060 too often and provide more accurate timings.
1061 - Add -gdb, -lldb, and -vgdb shortcuts to help debug MPI codes with smpirun
1062 - MPI_Alltoallw support
1063 - Partial MPI nonblocking collectives implementation: MPI_Ibcast, MPI_Ibarrier,
1064 MPI_Iallgather, MPI_Iallgatherv, MPI_Ialltoall, MPI_Ialltoallv, MPI_Igather,
1065 MPI_Igatherv, MPI_Iscatter, MPI_Iscatterv, MPI_Ialltoallw.
1066 - MPI_Request_get_status, MPI_Status_set_cancelled, MPI_Status_set_elements
1068 - Basic implementation of generalized requests (SMPI doesn't
1069 allow MPI_THREAD_MULTIPLE) : MPI_Grequest_complete, MPI_Grequest_start
1072 - Drop sg_cmdline. Please use xbt_cmdline instead.
1073 - Drop the C xbt_os_mutex_t; Use the C++11 std::mutex.
1074 - Drop the C xbt_os_sem_t; Use the C++ xbt::OsSemaphore.
1075 OsSemaphore is implemented in a portable way with C++11 threads.
1076 This should allow much more threads to be created at the same time,
1077 allowing Mac and Java users to simulate many more actors.
1078 - Implement the 'thread' factory with std::thread instead of xbt ones.
1079 It is not possible to set the stack size with threads anymore, but
1080 -fsplit-stack is the way to go nowadays when using threads.
1081 - Drop the xbt_os_thread_t module (now unused)
1082 - Drop xbt_ex_display(), use simgrid::xbt::log_exception() instead.
1083 - Drop xbt_str_join_array().
1084 - Drop cunit, use Catch2 instead.
1087 - Many cleanups in the kernel::activity namespace. This was long
1088 overdue, and shall open the path to many future endeavors.
1091 - #132: Java: a process can not shut down its own host
1092 - #220: S4U: detached send causes exception if sender terminates soon after sending
1093 - #261: Document the parameters of parallel execution's constructor
1094 - #300: [s4u] BarrierPtr is missing
1095 - #314: SMPI args internal cleanup
1096 - #316: Fix a bug related to the CPU utilization of multi-core VM
1097 - #318: Invalid trace file when using option --cfg=tracing/smpi/display-sizes:yes
1098 - #324: S4U: Attempting to create an actor on turned off host segfaults instead of throwing
1099 - #325: Turning off a host has different behavior on sleeping actors and computing actors
1101 ----------------------------------------------------------------------------
1103 SimGrid (3.21) October 3. 2018
1105 The Restarting Documentation (TRD) Release.
1108 - Convert the user manual to Sphinx for improved usability.
1109 Unstable version now hosted on https://simgrid.frama.io/simgrid
1110 Many glitches remain; stay tuned.
1111 - Restrict the Doxygen reference API to the installed header files.
1112 (documenting all internals this way is overkill + doxygen scales badly)
1113 - New tutorial on S4U (highly inspired from the old MSG one, but with
1114 a git repository to fork as a starting point, and a docker image)
1115 - Started but not finished an SMPI tutorial inspired from the JLPC'14 one.
1116 - The Developper manual is still to be converted (not compiled until then)
1117 - Some parts are still missing in this conversion (such as the
1118 platform and deployment sections) while others were blindly converted
1119 and would need more love (such as the configuration flags).
1120 Things will certainly further improve in the future releases.
1123 - Fully reimplement auto_restart mechanism that was utterly broken
1124 (fix #22, #131 and #281 that were all very related)
1125 - Implement semaphores (fix #303 and #291)
1126 - When creating an actor from a function and its parameters,
1127 move-only parameters are not allowed anymore, as it would prevent
1128 the actor to be restartable if its parameters are consumed on run.
1129 - s4u::Io: IOs go asynchronous as activities. New methods in s4u::Storage:
1130 - io_init(sg_size_t, s4u::Io::OpType) to create a READ or WRITE asynchronous
1131 IO operations that can be started, waited for, or canceled as a regular
1133 - read_async(sg_size_t) and write_async(sg_size_t) which are wrappers on
1137 - Rename 'power' and 'power_used' variables into 'speed' and 'speed_used'
1138 - New host variable: 'core_count'
1141 - Remove xbt_os_thread_specific features
1142 - Remove portability wrapper to condition variables
1143 - Remove xbt_os_thread_yield()
1146 - MPICH collective selector now mimics MPICH 3.3b
1147 - OpenMPI collective selector now mimics OpenMPI 3.1.2 (default "tuned" setting)
1148 - MPI_Init(NULL,NULL) is now allowed
1149 - smpi/wtime option now injects time in gettimeofday or clock_gettime calls
1150 - Command-line arguments should now be handled properly in Fortran simulations
1151 - MPI Attributes and related callbacks should work in Fortran
1152 - Apps using C + Fortran should now work
1153 - MPI_* calls now check for non MPI_SUCCESS return values and emit warnings
1154 - Support MPI_Error_String
1157 - Due to an internal bug, Msg.run() must now be your last line.
1158 We hope to fix it in a future release, and we are sorry for the inconvenience.
1161 - #22: Process autorestart seem to only work with CAS01 cpus
1162 - #56: Feature request: dynamic SMPI replay
1163 - #93: simgrid should not eat --help
1164 - #111: How to change the loopback link characteristics?
1165 - #116: Platform cluster radical
1166 - #117: Platform cluster/host order
1167 - #129: Replay_multiple on steroid
1168 - #131: Java : autostart does not work
1169 - #143: Setting a breakpoint at a given time
1170 - #235: Network energy models should be integrated
1171 - #264: Add ptask L07 resource tracing
1172 - #271: Dynamic and manual replay of SMPI traces
1173 - #279: Breakpoints option uses time deltas instead of absolute time
1174 - #281: Daemonized actor no longer daemonized after an auto-restart
1175 - #282: TIT convertor erase traces when using absolute path in the trace list file
1176 - #285: segfault when a s4u actor kills itself with msg process tracing activated
1177 - #286: Pajé traces are not exposing the number of cores
1178 - #287: Command-line parsing should stop when encountering '--'
1179 - #288: MPI_Init(NULL, NULL)
1180 - #289: Improve documentation of Actor::on_destruction and this_actor::on_exit()
1181 - #290: Method to check if a mailbox has a message ready to be consumed
1182 - #291: [s4u] semaphores do not seem available yet
1183 - #294: Alltoall collective implementation of mpich
1184 - #295: Starting a Host as OFF is not supported
1185 - #296: DTD too permissive
1186 - #299: Add a s4u barrier example
1188 ----------------------------------------------------------------------------
1190 SimGrid (3.20) Released June 24. 2018
1192 The proxy snake_case() release.
1195 - The whole API is now using snake_case() instead of mixing it with camelCase.
1196 Compatibility wrappers in place for one year.
1197 - We took the opportunity to increase the consistency of the API.
1198 Please report any remaining glitches.
1199 - New function simgrid::s4u::Host::get_actor_count:
1200 Returns the number of actors running on a specific host.
1203 - SMPI is now tested with ~45 proxy apps from various sources, with none or
1204 only minor patching needed: check https://github.com/simgrid/SMPI-proxy-apps
1205 - Replay: The replay file has been re-written in C++.
1206 - Replay: Tags used for messages sent via MPI_Send / MPI_Recv are now
1207 supported. They are stored in the trace and used when replayed.
1208 - Basic support of MPI_Cancel. Robustness not guaranteed.
1209 - Support of MPI_Win_allocate_shared, MPI_Win_shared_query, MPI_Comm_split_type
1210 (only for MPI_COMM_TYPE_SHARED).
1211 - New option: smpi/privatize-libs, to add external shared libs to be privatized
1212 by SMPI. They will be copied locally and loaded separately by each process.
1213 Example --cfg=smpi/privatize-libs:"libgfortran.so.3;libscalapack.so".
1214 - Tracing: add tracing for MPI_Start, Startall, Testall, Testany
1215 - Interception of getopt, getopt_long and getopt_long_only calls to avoid issues
1216 with internal index optind with multiple processes. Only works if MPI_Init has
1217 already been called.
1218 - Fortran: SMPI builds a mpi.mod file which should allow use of "use mpi"
1219 syntax without preprocessing tricks.
1222 - Change --cfg=tracing/msg/vm to --cfg=tracing/vm as virtual machine
1223 behavior tracing is no longer limited to MSG
1224 - TIT (Time Independent Traces): We finally support tags. Unfortunately,
1225 this means that traces now need to be updated or re-obtained; both Irecv
1226 and Isend lines in your traces have now in total 5 mandatory fields:
1227 <rankid> <command> <to/from rankid> <tag> <size>
1228 To update your traces, it suffices to add a 0 for the tag here.
1229 - TIT now also supports waiting for a distinct request via MPI_Wait.
1230 Wait/Test now wait for a specific request, not just the last one that was
1231 issued. This unfortunately means another update, because we need to
1232 identify which request you want to wait for. We do this via the
1233 triplet (sender, receiver, tag), which needs to be added:
1234 <rankid> <command> <sender> <receiver> <tag>
1235 - Actions are now in lower case (e.g., "allReduce" becomes "allreduce").
1236 New script simgrid_convert_TI_traces.py: upgrade your TI traces.
1239 - The deprecation of MSG is ongoing (but this should not impact you).
1240 Many MSG functions are now simple wrappers on the C API of S4U. If
1241 you wish to convert your code to S4U, find the S4U counterparts of
1242 your MSG calls in src/msg/msg_legacy.cpp.
1243 - MSG can still be used, but won't evolve anymore.
1246 - Allow to run the Link energy plugin from the command line with
1247 --cfg=plugin:link_energy
1248 - Rename Energy plugin into host_energy
1249 - Rename Load plugin into host_load
1252 - Add parameter --cfg=simix/breakpoint to raise a SIGTRAP at given time.
1253 - kill simix::onDeadlock() that was somewhat dupplicating s4u::on_deadlock()
1254 - Improve performance when handling timeouts of simix synchros.
1257 - Config: the C API is now deprecated (will be removed in 3.23), and
1258 the C++ API has been slightly improved.
1261 - Fix several build issues on OSX.
1262 - Move simgrid_config.h to simgrid/config.h (old header still working)
1265 - #143: Setting a breakpoint at a given time
1266 - #150: Inconsistent event names in SMPI replay
1267 - #258: daemonized actors hang after all non-daemonized actors have completed
1268 - #267: Linker error on unit_tmgr
1269 - #269: SMPI: tracing of MPI_Wait/all/any broken
1270 - SMPI: Fix various crashes with combined use of MPI_PROC_NULL and MPI_IGNORE_STATUS
1272 ----------------------------------------------------------------------------
1274 SimGrid (3.19.1) Released March 22 2018
1276 The Fixed ABI Release.
1278 As you may know, we are currently refactoring SimGrid in deep.
1279 Upcoming SimGrid4 will be really different from SimGrid3: modular,
1280 standard and extensible vs. layered, homegrown and rigid. C++ vs. C.
1282 Our goal is to smooth this transition, with backward compatibility
1283 and automatic update paths, while still progressing toward SimGrid4.
1285 SimGrid remains open during works: The last pure SimGrid3 release was
1286 v3.12 while all subsequent versions are usable alpha versions of
1287 SimGrid4: Existing interfaces remain unchanged, but the new S4U
1288 interface is budding and the internals are deeply reorganized.
1290 Since 2015, we work hard to reduce the changes to public APIs. When
1291 we need to rename a public library symbol in S4U, we let your
1292 compiler issue an explicative warning when you use the deprecated
1293 function. These messages remain for four releases, i.e. for one full
1294 year, before turning into an error. Starting with v3.15, your can
1295 also adapt to API changes with the SIMGRID_VERSION macro, that is
1296 defined to 31500 for v3.15, to 31901 for v3.19.1 and so on.
1298 Starting with this v3.19.1, our commitment to reduce the changes to
1299 the public interfaces is extended from the API to the ABI: a program
1300 using only MSG or SimDag and compiled against a given version of
1301 simgrid can probably be used with a later version of SimGrid without
1302 recompilation. We will do our best... but don't expect too much of
1303 it, that's a really difficult goal during such profund refactoring.
1305 The difference between v3.19 and v3.19.1 is that the former was
1306 accidentally breaking the ABI of MSG, while the later is restoring
1309 S4U and kernel APIs will still evolve until SimGrid4, with one-year
1310 deprecation warnings as currently. In fact, cleaning up these
1311 interfaces and converting them to snake_case() is one release goal of
1312 v3.20. But don't worry, we are working to smooth this upgrade path.
1314 In summary, new projects should start with S4U to benefit of the
1315 future, but old MSG projects should still be usable with no change.
1317 ----------------------------------------------------------------------------
1319 SimGrid (3.19) Released March 20 2018
1321 The Moscovitly-cold Spring release.
1323 SMPI user-visible improvements:
1324 - Support of MPI_Type_create_subarray
1325 - Unimplemented MPI calls now abort (instead of issuing a warning)
1326 Some harmless calls around errhandlers still only issue a warning.
1327 - MPI_Sendrecv was behaving badly when MPI_PROC_NULL was sender or receiver.
1328 - Starting MPI ranks (or even MSG/S4U actors) once the simulation started
1329 is now possible (mmap privatization was refactored to this end).
1330 Adding new SMPI instances should also be technically doable now.
1332 SMPI internal cleanups:
1333 - Removed index notion from SMPI -- no more "getPid() - 1"!
1334 In tracing files, actors are called rank-<PROCESS-ID> but these are
1335 NOT the real ranks (tracing several communicators is not supported yet).
1336 - Deprecate smpi_process_index() (will be removed in 3.22)
1337 - Better testing on classical proxy apps, through an external project:
1338 https://github.com/simgrid/SMPI-proxy-apps/
1341 - Use a graphical TOC to make it easier to find the documentation you need
1342 - Revamp the MSG tutorial
1345 - Fix MSG_task_get_remaining_work_ratio(): return 1.0 for unstarted tasks.
1346 - Remove parameter of MSG_process_killall().
1347 Resetting the PID was bogus anyway (several actors could have the same PID).
1350 - Execution->setHost() can be called after start(), to migrate it.
1351 - Comm::test_any() is now implemented.
1352 - s4u::Actor now has onCreation() and onDestruction() signals.
1353 - Install some kernel header files for the users' plugins and more.
1354 Warning, their API is really not stable yet.
1355 include/simgrid/kernel/resource/{Action,Resource,Model}.hpp
1356 include/simgrid/kernel/routing/*Zone.hpp
1359 - SD_task_dependency_add(): remove unused parameters 'name' and 'data'.
1361 Build System and other cleanups:
1362 - Remove unused run-time parameter "tracing/onelink-only".
1363 - SimGrid now works with intel compilers (MC still buggy)
1364 - Remove XBT_LOG_CONNECT, it should be useless nowadays.
1365 - tesh kills subprocesses on timeout (but not on windows)
1368 - Rename FULLDUPLEX into SPLITDUPLEX (old name still accepted)
1371 - #194: Feature request: simgrid::s4u::Comm::test_any()
1372 - #245: migrating an actor does not migrate its execution
1373 - #253: Feature Request: expose clusters as objects
1374 - #254: Something seems wrong with s4u::Actor::kill(aid_t)
1375 - #255: Tesh broken on Windows
1376 - #256: Modernize FindSimGrid.cmake
1377 - #257: Fix (ab)use of CMake install
1379 ----------------------------------------------------------------------------
1381 SimGrid (3.18) Released December 24 2017
1383 The "Ho Ho Ho! SimGrid 4 beta is coming to town" release.
1385 MSG IS NOW DEPRECATED. Please use S4U for new projects.
1386 - Support for MSG should not be removed from SimGrid before 2020,
1387 but future evolutions will be limited to the integration of
1388 user-provided patches.
1391 - s4u::onDeadlock() signal, run before stopping the simulation.
1392 - s4u::Exec: asynchronous executions (abstraction of background
1394 - s4u::Host->getLoad() returns the achieved speed in flops/s
1397 - Link::name() is deprecated and will be removed in v3.21, use
1398 Link::getCname() instead.
1399 - Mailbox::getName() changed to return a std::string, use
1400 Mailbox::getCname() instead to get a char*.
1401 - Storage::getName() changed to return a std::string, use
1402 Storage::getCname() instead to get a char*.
1403 - s4u::allStorages() becomes s4u::getStorageList(whereTo)
1404 to have both allocation and deallocation of the map in user space.
1407 - Forbid the use of MSG_task_get_flops_amount() on parallel tasks:
1408 The amount of flops remaining to do is a vector, not a scalar.
1409 - Introduce MSG_task_get_remaining_work_ratio(), which does what its
1410 name implies on both sequential and parallel tasks.
1411 - Both changes fix GitHub's #223 using PR #237 as a basis.
1412 Thanks Michael Mercier.
1413 - Most examples were converted to S4U and hidden elsewhere at tests.
1414 Rationale: we still want MSG to work; we want newcomers to use S4U.
1417 - LMM stuff moved to its own namespace: simgrid::kernel::lmm.
1418 - Renamed LMM classes (e.g. s_lmm_system_t -> System).
1421 - Switch to the faster dlopen privatization mechanism by default
1422 - Documentation improvments
1425 - Live migration is getting moved to a plugin. Dirty page tracking is
1426 the first part of this plugin. This imply that VM migration is now
1427 only possible if one this function is called:
1428 - C/MSG: MSG_vm_live_migration_plugin_init()
1429 - C/C++: sg_vm_live_migration_plugin_init()
1430 - Java: Msg.liveMigrationInit()
1431 For C and C++, "simgrid/plugins/live_migration.h" also has to be
1435 - Define class simgrid::xbt::Path to manage file names.
1436 - Removed unused functions:
1437 - xbt/file.h: xbt_basename(), xbt_dirname(), xbt_getline()
1438 - xbt/graph.h: xbt_graph_edge_get_length(), xbt_graph_edge_set_length,
1439 xbt_graph_export_graphviz()
1440 - xbt/str.h: xbt_str_join()
1441 - Remove unused datatypes:
1442 - xbt/heap.h: use std::priority_queue or boost::heap instead
1443 - xbt/swag.h: use boost::intrusive::list instead
1446 - New link_energy plugin for the consumption of the links.
1447 - All of the operations on files and storage contents have been
1448 packaged into a plugin (src/plugins/file_system). The current
1449 public interface can be found in
1450 include/simgrid/plugins/file_system.h
1451 To use these functions you now have to initialize the plugin by
1452 calling MSG_storage_file_system_init() just after calling
1453 MSG_init() or sg_storage_file_system_init() just after creating
1457 - Remove the undocumented/untested tag <include>
1460 - Remove viva specific tracing as the tool is no longer maintained
1463 - #248: Kill of finished processes leads to segfault
1464 - #240: xbt_cond_wait_timeout should gracefully return for C apps
1465 - #239: please implement signal s4u::onDeadlock()
1466 - #230: segfaults when exit() without run()
1467 - #225: s4u::Actor::kill() doesn not really kill victims in a join()
1468 - #223: MSG_task_get_flops_amount() not working with parallel tasks
1469 - #222: Actor::kill() doesn't really kill and segfaults
1470 - #221: odd LMM warning when killing an actor
1471 - #120: Memory leak when the processes are forcefully killed
1473 ----------------------------------------------------------------------------
1475 SimGrid (3.17) Released October 8 2017
1477 The Drained Leaks release: (almost) no known leaks despite the tests.
1479 Even very long simulations will preserve your memory: our testsuite
1480 stresses SimGrid for over 45mn on fast machines for a coverage of
1481 over 80%, and there is only one single known leak, of about 4kb.
1485 - Comm.detach(): start and forget about asynchronous emission. A cleanup
1486 handler may be given to free resources if the comm cannot be completed.
1487 - this_actor::send(mailbox) is now mailbox->put()
1488 - New: simgrid::s4u::Comm::wait_all()
1489 - New: Host.execute() for remote executions.
1492 - Unused option network/sender-gap is removed.
1495 - Deprecate MSG_task_isend_with_matching(): This unused feature
1496 really complicates our internals. Will be removed in v3.20.
1499 - Improved context termination. It is now possible to free resources, even
1500 when a process is forcibly killed.
1501 - ContextBoost: add support for Boost versions above 1.61.
1504 - Bring back run-time option --cfg=exception/cutpath to remove exception
1506 - Removed unused functions:
1507 - xbt/str.h: xbt_str_split_str(), xbt_str_subst(), xbt_str_ltrim(),
1508 xbt_str_rtrim(), xbt_str_trim().
1509 - xbt/xbt_os_thread.h: xbt_os_thread_cancel(), xbt_os_thread_detach().
1512 - Removed header files obsolete since SimGrid 3.12:
1513 msg/datatypes.h, msg/msg.h, simdag/datatypes.h, simdag/simdag.h.
1515 - #3: SD_exit should be made optional
1516 - #120: Memory leak when the processes are forcefully killed
1517 - #159: Threading test regression in Actor refcounting
1518 - #170: simgrid::s4u::Comm::wait_any() returns too many comms
1519 - #185: simgrid::s4u::Engine::instance()->shutdown() segfaults
1520 - #186: Actor::killAll() segfaults if some process is blocked on wait()
1521 - #191: VM migration and pstate
1522 - #192: Updating the energy consumptions of all hosts crashes with VMs
1523 - #195: All actors have PID=0 in the logs
1524 - #204: Sometimes segfault with thread contexts and mmap privatization
1525 - #222: Actor::kill() doesn't really kill and segfaults
1526 - #225: Actor::kill() doesn't really kill when victims are doing a join()
1528 ----------------------------------------------------------------------------
1530 SimGrid (3.16) Released June 22. 2017.
1532 The Blooming Spring Release: developments are budding.
1535 - FreeBSD: Disable SMPI mmap privatization, switch automatically to dlopen.
1536 - Mac, BSD: dlopen+thread broken, switch automatically to raw contexts.
1537 - Java JAR file should be finally fully working on Mac OSX too.
1539 XML platforms: Switch to platform v4.1 format.
1540 * This is (mainly) a backward compatible change: v4 are valid v4.1 files
1541 - <zone> can be used as a synonym for the now deprecated <as>
1542 - <zoneRoute> can be used as a synonym for the now deprecated <asroute>
1543 - <bypassZoneRoute> can be used as a synonym for the now deprecated <bypassAsRoute>
1544 - <actor> can be used as a synonym for the now deprecated <process>
1545 - state_file and avail_file periodicity is now easier to express
1546 (check the documentation) the old behavior should still work.
1547 * Storage: not backward compatible, but it seems that nobody ever used it
1548 - Remove attribute 'content_type' of <storage_type>: was never used
1549 - Make attribute 'model' of <storage_type> optional: for future usage
1550 - Remove Bconnection model property: was never (in)validated. Replaced by
1551 the maximum of the read and write bandwidth as a resource constraint.
1554 - New and Backwards Compatibility break:
1555 SD_simulate_with_update (double how_long, xbt_dynar_t changed_tasks_dynar)
1556 When one wants to get the list of tasks whose states have changed during a
1557 simulation round, s/he has to allocate and free a dynar and use it as
1558 argument to this function. The former SD_simulate (double how_long)
1562 - Allow multicore VMs, with the correct sharing (unless you overcommit)
1563 BUG: vCPU overcommitting still leads to buggy sharing, though. WIP.
1566 - New function to update the consumption of all hosts at once.
1567 - Fix the model for multi-core hosts, linear in the amount of busy
1568 cores with an abnormality for pIdle (see paper).
1569 BUG: Still not satisfactory for ptask on mono-cores.
1572 - The netzone are now available from the MSG API.
1573 The old names still work, but are now deprecated.
1576 - New algorithm to privatize globals: dlopen, with dynamic loading tricks
1577 - New option: smpi/keep-temps to not cleanup temp files
1578 - New option: smpi/shared-malloc-blocksize . Relevant only when global shared
1579 mallocs mode is used, allows to change the size of the fake file used
1580 (default 1MB), to potentially limit the number of mappings for large runs.
1581 - Support for sparse privatized malloc with SMPI_PARTIAL_SHARED_MALLOC()
1582 - Fortran ifort and flang compilers support
1583 - New RMA calls supported (experimental):
1584 - MPI_Win_allocate, MPI_Win_create_dynamic, MPI_Win_attach
1585 - MPI_Win_detach, MPI_Win_set_info, MPI_Win_get_info
1586 - MPI_Win_lock_all, MPI_Win_unlock_all, MPI_Win_flush
1587 - MPI_Win_flush_local, MPI_Win_flush_all, MPI_Win_flush_local_all
1588 - MPI_Op_commutative, MPI_Fetch_and_Op, MPI_Compare_and_swap
1589 - MPI_Rput, MPI_Rget, MPI_Raccumulate, MPI_Rget_accumulate
1592 - New: this_actor::isMaestro() returns whether we are in kernel mode.
1593 - Behind the scene, ActivityImpl are now automatically refcounted.
1594 Removing this nasty bottleneck will greatly simplify our internals.
1597 - Replay: New function xbt_replay_action_get():
1598 Retrieve the function previously associated to an event type.
1599 - DROPPED FUNCTION: xbt_str_varsubst()
1600 - DROPPED MODULE: strbuff. We don't need it anymore.
1601 - DROPPED MODULE: matrix. We don't need it anymore.
1602 - DROPPED MODULE: lib. We don't need it anymore.
1604 -- Thu Jun 22 22:48:12 CEST 2017 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1606 SimGrid (3.15) Released March 22. 2017
1608 The Spring Release: continuous integration servers become green
1609 We fixed even the transient bugs on all target architectures:
1610 Linux (CentOS, Debian, Ubuntu, Fedora), Mac OSX (Mavericks, El Capitan)
1611 Windows, FreeBSD, NetBSD.
1613 - Rename NetCards to NetPoints.
1614 This was intended to help NS3 users, but that's not a netcard.
1615 That's a point in the routing algorithm, let's avoid wrong simplifications.
1618 - New: MSG_process_yield(). Stop and yield to other processes.
1619 - New: MSG_process_daemon(). Daemon processes are automatically killed
1620 when the last non-daemon process terminates
1621 - New: MSG_process_ref/unref(). Fiddle with the process refcounting.
1622 - Renamed MSG_energy_plugin_init() -> MSG_host_energy_plugin_init()
1623 to make room for the upcoming network energy plugin.
1624 - Drop MSG_host_get_current_power_peak: duplicates MSG_host_get_speed
1627 - Ensure that an actor can kill itself with Process::exit()
1628 - Kill the obscure NativeException. Nobody want to survive the issues
1629 it denotes, so use JniException that is a RuntimeException (not to
1630 be caught explicitly).
1631 - Partial bug fix in initialization. SimGrid flags on command line were
1632 consumed at C level but stayed in the original Java String[] args.
1633 This could mess users' args[i] if SG flags were not put at the end of
1635 The SimGrid flags are now removed from the Java arguments. However,
1636 the number of arguments REMAINS UNCHANGED. It is then UNSAFE to test
1637 if args.length is greater than the number of YOUR OWN ARGUMENTS.
1638 It might be if you have --log or --cfg flags in the command line.
1639 - Fix numerous memleaks all around the place. In particular, around VMs.
1643 - s4u::onPlatformCreated: right before the simulation starts
1644 - s4u::onSimulationEnd: right after the main simulation loop
1645 - s4u::onTimeAdvance: right after a clock change (time is discrete)
1646 - s4u::Host::onSpeedChange: when the pstate is changed, or when an
1647 event from the availability_file changes the avail speed.
1648 - Links are now usable from s4u
1649 - New: Engine::hostList() and Engine::hostCount(). Still clumsy.
1650 - New: Actor::suspend(), Actor::resume(), and Actor::migrate(new_host)
1651 - New examples: The conversion of MSG examples to S4U has begun
1652 - Actors: create, kill, migration, and suspend
1653 - Applications: master-worker and token-ring
1654 - Action replay: communications and storage
1655 - Drop Host::getPstateSpeedCurrent() which duplicates Host::speed()
1658 - Backwards Compatibility breaks
1659 - The SD_route_get_list and SD_route_get_size functions have been removed.
1660 They are replaced by the unique
1661 void sg_host_route(sg_host_t src, sg_host_t dst, xbt_dynar_t links)
1662 The route from src to dst is built in the links dynar whose size can
1663 be obtained with xbt_dynar_length.
1664 - The SD_route_bandwidth and SD_route_latency functions have been replaced by
1665 sg_host_route_bandwidth and sg_host_route_latency.
1666 Macros ensure the backwards compatibility, but you should fix your code
1669 - Major C++ rewrite ongoing (SMPI used to be C compiled in C++).
1670 This can break codes using SMPI internals (from private.h instead of the public smpi.h).
1671 - Bump our claim of support from MPI 1.1 to MPI 2.2.
1672 We don't support 100% of it, but it should be enough. Contact us if not.
1673 - MPI_Win_lock/unlock, MPI_Get_accumulate support added (as for all RMA, implementation is
1674 naive and probably inaccurate)
1675 - New algorithm for SMPI_SHARED_MALLOC: global, where all blocks are
1676 mapped onto a unique small file using some system magic.
1677 - Bugfix: smpirun was sometimes misusing hostfile when wrongly terminated
1678 - Fortran: cleanups, fixes, support of user-added operations
1679 - RMA: MPI_Accumulate are applied in correct order.
1680 - RMA: MPI_Win_{complete/post} shouldn't miss messages anymore.
1681 - Better support for MPI_IN_PLACE
1682 - Support for MPI_Win attrs and keyvals.
1683 - Support MPI_Comm_group_create, MPI_Type_size_x
1684 - MPI ops should be properly applied to all allowed types
1685 - Replace implementation of MPI_Bcast "scatter followed by rdb allgather"
1686 algorithm by a non failing one from mpich.
1689 - Kill the fifo data container: we don't use it anymore.
1692 - A <cluster> can now be created with different speed values to represent pstates.
1693 see examples/platforms/energy_cluster.xml for an example.
1695 SimGrid (3.14.159) Released December 28. 2016
1697 The previous release was only a crude approximation of a Pi release;
1698 this one should be a bit better.
1700 - Revert a last minute change that broke on Mac OSX.
1701 - Fix the changelog and NEWS files.
1702 - Improve the documentation, in particular of the routing module.
1703 - Integrate some patches flying around in Debian.
1705 SimGrid (3.14) Released December 24. 2016
1708 * The whole documentation was reworked and reorganized. There is
1709 still much room for improvement here, but we're on it.
1712 * We now need python3 for our testing infrastructure.
1713 * Model checking needs libevent
1716 * Now works on FreeBSD
1719 * Privatization now works on FreeBSD
1721 * Privatization is now activated by default in smpirun
1722 You can turn it off with -no-privatize if something goes wrong.
1724 * Call-location tracing for SMPI.
1725 You can add the exact location (filename / linenumber) of an MPI call to
1726 your trace files and slow down or speed up the simulation between two
1727 consecutive calls by using an adjustment file (see the documentation).
1729 * Fixed computation of timings for MPI_Send, MPI_Recv & possibly also others
1730 We've found a bug that prevented SMPI to account for MPI_Send, MPI_Recv
1731 and others (in some cases) in a correct way. That is, the smpi/os, smpi/or
1732 values were ignored in some cases. The timings of these functions can now
1733 be significantly different.
1735 * smpi/cpu-threshold:-1 should become smpi/simulate-computation:no
1736 smpi/running-power is renamed to smpi/host-speed
1738 * smpi/grow-injected-times option to enable or disable multiplication of the
1739 timings injected in MPI_Iprobe, or MPI_Test. Enabled by default, which can
1740 make simulation less precise (but also much faster).
1742 * smpirun script should be (much) faster for large deployments.
1744 * SMPI tracing: fixed issue with poor matching of send/receives.
1746 * Replay: Fix broken waitall
1748 New functions and features
1749 * MSG_parallel_task_execute_with_timeout, to timeout computations.
1751 Dropped / renamed functions and features
1752 * msg_mailbox_t and associated functions. Use s4u::Mailbox instead.
1753 - MSG_mailbox_is_empty() -> Mailbox::empty()
1754 - MSG_mailbox_front() -> Mailbox::front()
1755 - MSG_mailbox_get_by_alias() -> simgrid::s4u::Mailbox::byName(name)
1756 - MSG_mailbox_get_task_ext() -> MSG_task_receive_ext()
1757 - MSG_mailbox_get_task_ext_bounded -> MSG_task_receive_ext_bounded
1758 - MSG_host_(get/set)_params -> MSG_vm_(get/set)_params
1759 * Don't pass the free_f parameter to property related functions:
1760 - MSG_host_set_property_value()
1761 - MSG_as_router_set_property_value()
1762 - MSG_storage_set_property_value()
1763 * VM properties. Since msg_vm_t are msg_host_t, just use
1764 MSG_host_get_property_value() and friends
1765 * VM I/O related things:
1766 - Ignored parameter of vm_create: core_nb, disk_path and disk_size.
1767 - Unimplemented save/restore methods
1768 * MSG_as_router_get_property_value() was redundant with
1769 MSG_environment_as_get_property_value().
1770 - Removed MSG_as_router_*propert*() functions
1771 - Added MSG_environment_as_set_property_value() for consistency
1772 * xbt heterogeneous dictionaries (created with xbt_dict_new()).
1773 Well, they are still there for now, but deprecated with a warning.
1774 Please switch to xbt_dict_new_homogeneous() before this is removed
1776 * Task affinity. Its intended behavior (that was very badly tested
1777 and probably not really working) was deceiving what most users
1778 would have hoped here.
1779 * xbt_os_sem_get_value: unused internally, deprecated on OS X El Capitan
1780 * Option network/coordinates is now useless and should be dropped.
1783 * Added option storage/max_file_descriptors to allow more than 1024 files opened
1786 * Added option maxmin/concurrency_limit to allow more than 100 processes per host
1787 * Added Dragonfly topology support
1790 * Add Exa- and Peta- units such as EiB, EB, Eib, Eb for size, and
1791 EiBps, EBps, Eibps, Ebps for bandwidth.
1792 They may become useful to some lucky ones.
1795 * New functions: msg.Comm.waitAll() and msg.Comm.waitAny()
1796 * ex/app_tokenring: new example, very similar to the MSG Token Ring
1797 * ex/async_waitAll: new example, on asynchronous communications
1800 * Memory usage should be decreased for simulations with a large number
1801 of processes. This also helps for SMPI.
1803 SimGrid (3.13) stable; urgency=low
1805 The Half Release, a.k.a. the Zealous Easter Trim.
1807 - We removed half of the lines, that were mostly experimental cruft.
1808 v3.12 lasted 286000 lines of code, v3.13 is only 142000 lines
1809 (not counting blanks and comments -- according to openhub.net)
1810 - The internals are now compiled in C++ (and will soon be clean C++)
1811 - We removed 75 klines of XML, 12 klines of Java, 5 klines of cmake,
1812 59 klines of C, etc. We added only 29 klines of C++ in replacement.
1814 * Backwards Compatibility breaks
1815 - Removed Lua simulation bindings (switch to C or Java for that).
1816 Lua can still be used to describe platforms
1817 - Removed Java kernel plug-ins.
1818 Will be reintroduced after the ongoing major internals reorg.
1820 - the following functions were removed.
1821 They were too specific and should be reimplemented in a generic
1822 way, with filter function.
1823 - MSG_task_listen_from_host
1824 - MSG_mailbox_get_count_host_waiting_tasks
1825 - MSG_mailbox_put_with_timeout was removed.
1826 Please use MSG_task_send_with_timeout instead.
1828 - the SD_application_reinit function was removed. It has been a noop for a while.
1829 - The ACCESS_MODE of SD_workstation has been removed. This feature was not really usable and should soon be
1830 replaced by a more flexible mechanism.
1831 - The following functions thus do not exist anymore
1832 - SD_workstation_get_access_mode
1833 - SD_workstation_set_access_mode
1834 - SD_workstation_get_current_task
1835 - Basic estimation functions have been removed but can easily be replaced
1836 - SD_route_get_communication_time => SG_route_get_latency() + amount / SD_route_get_bandwidth()
1837 - SD_workstation_get_computation_time => amount / sg_host_speed()
1839 - VM.setBound(int load) is now VM.setBound(double bound) to meet the MSG semantics.
1840 Use VM.getSpeed()*load/100 for the legacy behavior.
1842 - option enable_tracing was removed. It was not doing anything for a while.
1843 - In the ModelChecker:
1844 - the model-checker now ptraces the model-checked process which means
1845 you cannot use a debugger on the latter anymore (we might make this
1846 optional in the feature);
1847 - removed soft-dirty page tracking;
1848 - remove model-checked side snapshot management,
1849 MC_snapshot() and MC_compare_snapshot();
1850 - keep the MC_cut() function as a stub (it was not really working
1851 in the previous release).
1854 * All options are consistently in kebab-case. Old names are kept as alias.
1857 * Switch to platform v4 format.
1858 - Rename from 'power' to 'speed' the attributes describing the amount of
1859 flops that a <host>, <peer>, <cluster> or <cabinet> can deliver per second.
1860 - In <trace_connect>, attribute kind="POWER" is now kind="SPEED".
1861 - In <host> and <link>, attributes availability and state are gone.
1862 It was redundant with state and availability traces, and with peak values.
1863 - In <cluster>, attributes availability_file and state_file are gone.
1864 It was too complex and unused.
1865 - Kill <gpu>. Was not doing anything.
1866 - The DOCTYPE points to the right URL:
1867 http://simgrid.gforge.inria.fr/simgrid/simgrid.dtd
1868 (the file at this address now documents the changelog since its v1)
1869 - A warning is emitted for unit-less values (they are still accepted).
1870 - speed. Default: 'f' or 'flops'. Also defined:
1871 'Yf', 'Zf', 'Ef', 'Pf', 'Tf', 'Gf', 'Mf', 'kf'
1872 'yottaflops', 'zettaflops', 'exaflops', 'petaflops', 'teraflops', 'gigaflops', 'megaflops', 'kiloflops'
1873 - bandwidth. Default: 'Bps' bytes per second (or 'bps' for bits but 1 Bps = 8 bps)
1874 Also defined in bytes: 'TiBps', 'GiBps', 'MiBps', 'KiBps', 'TBps', 'GBps', 'MBps', 'kBps', 'Bps'
1875 And the same in bits: 'Tibps', 'Gibps', 'Mibps', 'Kibps', 'Tbps', 'Gbps', 'Mbps', 'kbps', 'bps'
1876 - latency. Default: 's' second. Also defined:
1877 'w' week, 'd' day, 'h' hour, 'm' minute, 'ms' millisecond, 'us' microsecond, 'ns' nanosecond, 'ps' picosecond
1879 * bin/simgrid_update_xml can upgrade your files automatically (won't convert unit-less values)
1880 tools/sg_xml_unit_converter.py may help (but it's just a warning and will probably ever be).
1883 * s4u::Host is now the preferred public interface to the Host features.
1884 sg_host_* functions are C bindings to the exact same behavior
1885 MSG_host_* and SD_workstation_* are #define to the sg_host_* ones
1888 * The examples were completely reorganized (in C and Java), for your browsing pleasure.
1889 * Kill all deprecated functions (the ones you had when declaring MSG_DEPRECATED).
1890 They were deprecated since a few years, and probably did not even compile anymore.
1893 * The API has been profoundly modified to directly use the core objects instead of redefining its own.
1894 SD_Workstation_t and SD_link_t are now sg_host_t and sg_link_t respectively.
1895 Some functions have also been renamed for consistency. Backward compatibility is maintained, but users are
1896 encouraged to update their codes. A list of the modified functions can be found at the end of
1897 include/simgrid/simdag.h
1900 * simgrid::simix::kernelImmediate() is the closure callback. It ensures that
1901 the lambda or closure passed as a parameter will run in kernel mode.
1902 All the callback functions should be rewritten to that interface at some point.
1905 * Reorganizing and cleaning the internals all around the place.
1908 * Remove old default barrier/bcast buggy algorithms (see #18407)
1909 * Various bug fixes to handle more codes
1910 * Remove the need for the --foreground option of smpirun (it is still
1911 accepted for backward compatibility).
1914 * Kill the setset data container: MC don't use it anymore.
1915 * Kill the queue data container: it made more sense with GRAS.
1916 * Kill the xbt_peer_t data type: it's useless without GRAS.
1917 * Kill rm_cb feature of config sets: it was never useful.
1918 * Kill graphxml parsing feature. It was not used.
1919 * Kill the deprecated code protected by XBT_USE_DEPRECATED
1921 - xbt_dynar_sort_strings(), when the content is char*
1922 - xbt_str_parse_int / xbt_str_parse_double, wrapping strtol/strtod
1923 They throw exceptions on invalid input;
1924 * C++ support for declaring CLI flags (simgrid::config::Flag);
1925 * class for abstracting different signal backends (simgrid::xbt::signal).
1926 with no external dependencies (we need very simple signals).
1929 * refactoring and cleanup of the code;
1930 * ongoing process to cleanly separate the model-checking algorithms
1931 from the code model-checking support.
1933 -- Wed Apr 27 21:00:53 CEST 2016 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1935 SimGrid (3.12) stable; urgency=low
1937 The Facelift Release.
1940 * Require g++ v4.7 at least to not speak prehistorical C++.
1941 * Require Boost 1.48 (for signal2 component).
1942 * Java must be version 7 at least when activated.
1943 * Builds on Windows again (including Java bindings).
1944 * Tracing is now always enabled (no way to turn it out)
1945 * Remove GTNetS. It was not working anyway.
1946 * Various cleanups in the cmake scripts.
1947 * Move headers around to sort them out on installed systems:
1948 - instr/instr.h -> simgrid/instr.h
1949 - instr/jedule/* -> simgrid/jedule
1950 - simdag/datatypes.h was removed
1951 - simdag/simdag.h -> simgrid/simdag.h
1952 - msg/datatypes.h was removed
1953 - msg/msg.h -> simgrid/msg.h
1956 * Interface improvement:
1957 - Rename MSG_host_is_avail(h) to MSG_host_is_on(h)
1958 - Sanitize the interface in MSG_task_ module:
1959 - Merge two functions that were close enough but misleading:
1960 set_compute_duration(t) -> set_flops_amount(t)
1961 get_remaining_computation(t) -> get_flops_amount(t)
1962 - set_data_size(t) -> set_bytes_amount(t)
1963 get_data_size(t) -> get_bytes_amount(t)
1964 - Massive cleanups in the functions related to the energy
1965 - MSG_host_get_pstate_number() -> MSG_host_get_nb_pstates()
1966 - New: MSG_host_get_pstate()
1968 - msg/energy/onoff: switching hosts on and off
1970 * Interface improvement:
1971 - Rename Host.isAvail() to Host.isOn()
1972 - Rename Process.currentProcess() to Process.getCurrentProcess()
1973 - Rename Task.setDataSize() to Task.setBytesAmount()
1974 - Merge Task.getRemainingDuration() and Task.getComputeDuration() into Task.getFlopsAmount()
1976 - #18874: Actually allows the GC to reclaim tasks
1980 - SIMIX_process_throw: raises an exception in a remote process
1981 * Refactoring: Separate sub-modules
1982 - libsmx: the public interface, as libc in a real system
1983 - popping: the strange dance that converts a user request into a kernel handling
1984 - smx_context_*: the virtualization mechanisms that embed the user code
1985 - smx_*: the handling of each simcalls
1986 * Interface cleanup:
1987 - simcall_host_set_power_peak_at -> simcall_host_set_pstate
1988 * Rename smx_action_t into smx_synchro_t, making explicit that these
1989 things are used to synchronize processes with their environment.
1990 For example, a communication is a sort of synchronization involving
1991 the communicating processes (that may block until the exchange) and
1992 the platform. The same can be said from computations, etc.
1994 - #18888: segfault when a process ends before its kill_time
1998 - Onesided early support for: MPI_Win_(create, free, fence, get_name, set_name, get_group), MPI_Get, MPI_Put, MPI_Accumulate, MPI_Alloc_mem, MPI_Free_mem.
1999 - MPI_Keyval*, MPI_Attr* functions, as well as MPI_Comm_attr*, MPI_Type_attr* variants (C only, no Fortran support yet)
2000 - MPI_Type_set_name, MPI_Type_get_name
2001 - MPI_*_c2f and MPI_*_f2c functions
2002 - MPI_Info_* functions (beware, get_nthkey may not follow the insertion order)
2003 - MPI_Pack, MPI_Unpack and MPI_Pack_size functions
2004 - Activate a lot of new tests from the mpich 3 testsuite
2006 - Constant times can be injected inside MPI_Wtime and MPI_Test through options smpi/wtime and smpi/test
2007 - InfiniBand network model added: Based on the works of Jerome Vienne
2008 http://mescal.imag.fr/membres/jean-marc.vincent/index.html/PhD/Vienne.pdf
2009 - When smpi/display_timing is set, also display global simulation time and application times
2010 - Have smpirun, smpicc and friends display the simgrid git hash version on --git-version
2011 * Collective communications
2012 - SMP-aware algorithms are now dynamically handled. An internal communicator is created for each node, and an external one to handle communications between "leaders" of each node
2013 - MVAPICH2 (1.9) collective algorithms selector: normal and SMP algorithms are handled, and selection logic is based on the one used on TACC's Stampede cluster (https://www.tacc.utexas.edu/stampede/).
2014 - Support for Rabenseifner Reduce/Allreduce algorithms (https://fs.hlrs.de/projects/par/mpi//myreduce.html)
2016 - Replay now uses algorithms from wanted collective selector
2017 - Replay can be used with SMP-aware algorithms
2018 - Memory occupation of replay should now be contained (temporary buffers allocated in collective algorithms should be shared between processes)
2019 - Replay can now replay several traces at the same time (check examples/smpi/replay_multiple example), to simulate interactions between several applications on a given platform. User can specify the start time of each instance. This should also allow replay + actual applications to run.
2021 - [#17799]: have mpi_group_range_incl and mpi_group_range_excl better test some corner cases
2022 - Correctly use loopback on fat-tree clusters
2023 - Asynchronous small messages shouldn't trigger deadlocks anymore
2024 * Energy/DVFS cleanup and improvement
2025 - smpi_set_host_power_peak_at() -> smpi_set_host_pstate()
2026 - new: smpi_get_host_pstate()
2029 - "Full" network optimization flag was broken since Surf++
2030 - Better handling of precision flags in maxmin
2031 - Fix bug causing sometimes "Impossible" errors
2032 - Properly pass cluster properties to included hosts
2033 * Improvement of the Energy plugin.
2034 - Always update the consumption before returning that value
2035 - New property: watt_off to denote the dissipation when the host is off
2036 - New functions getWattMinAt and getWattMaxAt to retrieve the
2037 dissipation of pstates that we are not currently at.
2038 * Java: class NetworkLink renamed to Link
2039 * New function: simcall_process_get_kill_time()
2040 * Massive rename s/workstation/host/
2041 - That's intrusive, but that's good for the project consistency. Sorry.
2042 - Change config option "workstation/model" into "host/model"
2045 - Add a xbt_heap_update function, to avoid costly xbt_heap_remove+xbt_heap_insert use
2046 - Add a xbt wrapper for simcall_mutex_trylock (asked in [#17878])
2047 - Add two new log appenders: rollfile and splitfile. Patch by Fabien Chaix.
2048 - xbt_dirname and xbt_basename for non-POSIX systems
2050 * The model checker now runs as a separate process.
2051 * The model checker runs must now be launched with the new simgrid-mc program.
2052 * Record/Replay: the MC can display a textual representation of a path in the
2053 execution graph. It can then be replayed outside of the model checker.
2055 -- Mon Oct 12 06:02:41 CEST 2015 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2057 SimGrid (3.11) stable; urgency=low
2062 * Normalizing pointers addresses tool for better diff between logs
2065 * Add cloud examples using new VMs
2066 - examples/msg/cloud/two_tasks_vm.tesh
2067 - examples/msg/cloud/simple_vm.tesh
2068 - examples/java/cloud/cloud.tesh
2069 - examples/java/cloud/migration/migration.tesh
2070 * Add java surf examples:
2071 - examples/java/surfPlugin/surf_plugin.tesh
2072 - examples/java/reservationSurfPlugin/reservation_surf_plugin.tes
2073 - examples/java/surfCpuModel/surf_cpu_model.tesh
2074 * Add SMPI+MSG example:
2075 - examples/smpi/smpi_msg_masterslave/
2080 - msg task destroy cancel test
2081 - msg_host on/off test
2082 * Move all tests in testsuite to teshsuite (adding tesh files)
2083 * Restructure teshsuites
2084 - one folder for each kind of test
2085 * Restructure AddTests.cmake
2087 - structure the order of tests (with sections)
2090 * Add virtual machine
2091 - creation of a VM on a PM
2092 - migration of a VM from a PM to another PM
2094 - MSG_process_join(msg_process_t process, double timeout)
2095 - msg_bar_t MSG_barrier_init(unsigned int count)
2096 - int MSG_barrier_wait(msg_bar_t barrier)
2097 - void MSG_barrier_destroy(msg_bar_t barrier)
2098 - msg_as_t MSG_environment_as_get_by_name(const char * name)
2099 * New option "msg/debug_multiple_use" to help debugging when a task is used
2102 - Improvements and finalization of MSG_storage, MSG_file APIs and their
2104 - Increase code coverage in test suites
2108 * Protect context stacks against stack overflow. The number of protected memory
2109 pages allocated on the top of each stack (1 by default) can be configured
2110 with the new command line option --cfg=contexts/guard_size:<value>.
2111 * Simcalls are now generated by a python script that
2112 - generates files included by SimGrid
2113 - checks that all the functions exist, and proposes prototypes
2115 - remove sem_destroy, file_set_data, comm_destroy, vm_set_state,
2116 host_set_data, host_get_data
2118 - simcall_process_join(smx_process_t process, double timeout)
2119 * Fix bug where sleeping processing could not be suspended.
2122 * Translate surf models from C to C++
2123 - Generic classes for all models: Model, Resource, Action
2124 - A generic interface for each kind of model (CPU, Network, Storage
2125 Workstation, WorkstationVM)
2127 * Translate surf routings from C to C++
2128 * Add callbacks using sigc++ or boost::signals2
2129 - Add callback functions for resource creation/destruction
2130 - Add callback functions for action state change
2131 - Handle Energy as a plugin
2132 * Replace swag by boost::intrusive
2133 * Add new routing models for clusters. For documentation, see
2134 http://simgrid.gforge.inria.fr/simgrid/latest/doc/platform.html#pf_cluster
2135 - tori, with topology="TORUS" and topo_parameters="ndim1,ndim2,...,ndimn"
2136 parameters for cluster tag
2137 - Fat trees, with topology="FAT_TREE" and
2138 topo_parameters="h;m1,...,mh;w1,...,wh;p1,...,ph" parameters for cluster tag
2139 - see examples/platforms/torus_cluster.xml and
2140 examples/platforms/fat_tree_cluster.xml
2141 * More documentation
2144 * Hostfiles support host:nb_processes construct to deploy several processes on
2146 * Collective communication algorithms should not crash if used with
2147 improper number of nodes and report the error.
2148 * SMPI now partially supports MPI_Topologies: MPI_Cart_create, MPI_Cart_shift,
2149 MPI_Cart_rank, MPI_Cart_get, MPI_Cart_coords, MPI_Cartdim_get,
2150 MPI_Dims_create, MPI_Cart_sub are supported.
2151 * New interface to use SMPI programmatically (still depends on MSG for
2152 some parts, see examples/smpi/smpi_msg_masterslave):
2153 - SMPI_app_instance_register(const char *name, xbt_main_func_t code,
2157 * Global variables privatization in MPI executables is now performed at runtime
2158 with the option smpi/privatize_global_variables (default:no).
2159 Limitations: Linux/BSD only, with mmap enabled. Global variables inside
2160 dynamic libraries loaded by the application are not privatized (static
2161 linking with these libraries is advised in this case)
2164 * Options defined in XML work correctly now.
2167 * New cmake option, enable_lib_in_jar, to control whether native libraries are
2168 copied into simgrid.jar or not (ON by default). Use this option if you want
2169 to reduce the size of the installed simgrid.jar, *and* the native libraries
2170 are kept installed elsewhere.
2171 * Surf binding with SWIG (code generated in maintainer mode only):
2172 - plugin to handle callbacks
2173 - CPU model only for the moment
2176 * Supernovae build mode is definitively removed. It was used to improve
2177 inlining and inter-module optimizations. It is nowadays superseded by
2178 link-time optimizations commonly available in compilers.
2179 * Update ns-3 find lib. Bindings for ns-3 should work again now.
2180 * Add boost dependency for surf++
2181 * Add new macro for tests
2182 - ADD_TESH(name <tesh_args>)
2183 - ADD_TESH_FACTORIES(name "thread;ucontext;raw" <tesh_args>)
2187 - xbt_bar_t XBT_barrier_init(unsigned int count)
2188 - int XBT_barrier_wait(xbt_bar_t barrier)
2189 - void XBT_barrier_destroy(xbt_bar_t barrier)
2190 * Make the xbt_os_time module public
2192 -- Sat May 31 22:39:38 CEST 2014 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2194 SimGrid (3.10) stable; urgency=low
2196 The Clean Diaper Release, a.k.a. SimGrid is leak-free.
2199 * Reintegrate Java to the main archive as desynchronizing these
2200 package is not acceptable anymore (Java is now considered stable)
2201 * Add explicit synchronization facilities through semaphores
2202 * Bug fix: Task.setDataSize() only changed the C world, not the value
2203 cached in the Java world
2206 * Dramatically change the way files are handled. API and internals changed, but
2207 this part of MSG was not considered as production grade either.
2208 * Add explicit synchronization facilities through semaphores
2209 * Add a new function MSG_host_get_process_list()
2210 * Preliminary DVFS support (see examples/msg/energy/ for details)
2213 * SMPI is now included directly in the libsimgrid as the windows
2214 linker doesn't force us on splitting it anymore.
2215 * Improvements of the SMPI replay tool:
2216 - Most of the collective communications are now rooted in the same process as
2217 in the original application.
2218 - Traces now rely on the same MPI data type as the application (MPI_BYTE was
2219 used until now). Multiple data types can now be used in a trace.
2220 - The replay tool now supports traces produce either by TAU or a modified
2222 - Bug Fix: the compute part of the reduce action is now taken into account.
2223 - Gatherv collective is now supported
2224 - SimGrid (SMPI for now) can generate replay traces as well. Option -trace-ti
2225 of smpirun outputs time independent traces for the current run. One file
2226 is created per process. If too many processes are simulated, this behavior
2227 can be changed to one file for all processes by using the
2228 tracing/smpi/format/ti_one_file flag
2229 * smpirun generates the host file if needed (with given host count and platform)
2230 * Integration of more than 100 STAR-MPI, MPICH, OpenMPI collective algorithms
2231 - allows to select one in particular with --cfg=smpi/coll_name:algorithm
2232 - allows to use the decision logic of OpenMPI(1.7) or MPICH(3.0.4) by setting
2233 --cfg=smpi/coll_selector:(mpich/ompi)
2234 * Support for new functions: MPI_Issend, MPI_Ssend, Commutative operations in
2236 * Add a --cfg:tracing/smpi/internals option, to trace internal communications
2237 happening inside a collective SMPI call.
2238 * Fix the behavior of complex data types handling.
2239 * Make MPI_Wtime another synchronization point to take computations into
2241 * Replace MPICH-1 test suite by the one from MPICH 3.0.4. Can be built using
2242 enable_smpi_MPICH3_testsuite flag in cmake. Run with ctest.
2243 * Add all missing Fortran bindings, SMPI should work with Fortran 90
2244 (no privatization of global variables yet)
2245 * Preliminary DVFS support (see examples/smpi/energy/ for details)
2248 * Verification of liveness properties is now available for SMPI applications
2249 (in addition to MSG applications)
2250 * Bugged examples using SMPI in examples/smpi/mc/
2251 * Add --cfg=model-check/visited option. Allows the verification of infinite
2252 programs. Detection of loops in the execution thanks to the system state
2253 comparison and reduction of the state space to explore. Can be combined with
2254 DPOR for safety properties.
2257 * Allow to change SimGrid configuration (see --help) within the code
2258 thanks to SD_config() as it can be done in MSG.
2259 * Add a new function SD_task_set_amount() upon user request.
2262 * Handle units for values (10ms, 10kiloflops, 10Bps, 1GB, ...)
2263 * Remove rule based routing (no more PCRE dependency)
2264 * Add a limiter_link option to cluster tag, to specify a maximum reachable
2265 bandwidth in fullduplex mode when it is less than twice the nominal bandwidth.
2266 * Add a loopback_bw and loopback_lat options to cluster tag.
2267 * Fix the peer tag that could not be mixed with other AS within a Vivaldi
2268 routing. Now peers are encapsulated in an AS and have their own private
2269 router but this is transparent.
2272 * Our own implementation of getline is renamed xbt_getline, and gets
2273 used even if the OS provide a getline(). This should reduce the
2274 configuration complexity by using the same code on all platforms.
2275 * New type: xbt_cfg_elm_boolean.
2276 * Allow to use yes/no for boolean configuration options in the command line.
2277 * Allow to disable SimGrid cleanups at exit from command line option.
2278 There are situations where one may want a simulation to end with an exit.
2279 Unfortunately, calling exit may cause SimGrid to segfault, which is quite
2280 annoying when scripting around the simulator. Adding a
2281 --cfg=clean_atexit:no allows to circumvent this issue.
2284 * Lots of memory leaks were corrected in this release.
2285 There is no known memory leaks anymore, in all of our 600+ tests.
2286 * New command line option --version, to get SimGrid version information.
2287 Packagers may want to add extra words to SIMGRID_VERSION_EXTRA defined in
2289 * Supernovae builds are deprecated, and expected to be removed in the next
2292 -- Sun Nov 17 00:26:44 CET 2013 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2294 SimGrid (3.9) stable; urgency=low
2296 The Grasgory release: GRAS is really dead now.
2298 * Complete overhaul of the internal host structures scheme.
2301 * If you use GRAS, you should stay at SimGrid 3.5 (at most) since it
2302 was considered as experimental and badly maintained since then.
2303 * Keeping it was thus a trap to our potential users, that could take
2304 it instead of MSG or SMPI by mistake despite is pity state.
2305 * GRAS seems to have very few users (if any), and no one volunteered
2306 to maintain it further. It also induces a lot of XBT code (for
2307 portability sake), that must be maintained too.
2308 * For all these reasons, we killed GRAS. If someone wants to revive it
2309 in the future, don't cry, our git history still remembers of GRAS.
2312 * Major overhaul. Merge our documentation again as time proved that
2313 splitting it was really not helping our users.
2314 * Further improve the developer documentation to help newcomers
2315 hacking on SimGrid itself. The user documentation (and in
2316 particular, the beginner documentation) is still in a sorry state.
2319 * Now works on Windows too!
2320 * Much more extensive test suite, from MPICH
2323 * Add a new loader (SD_PTG_dotload) that creates a parallel task graph
2324 (i.e., a DAG whose nodes are parallel tasks) from a dot file. Creates a
2325 dynar of SD_TASK_COMP_PAR_AMDAHL and SD_TASK_COMM_MXN_1D_BLOCK tasks.
2326 * Bug fix: let task be scheduled when the last dependency to be solved is
2327 a control dependency.
2328 * Remove SD_load_environment_script function.
2329 Use the C sg_platf function if you want to declare a platform
2333 * New function: MSG_process_get_number()
2334 * Old function documented: MSG_config()
2335 * Remove MSG_load_platform_script function
2336 Use the C sg_platf function if you want to declare a platform
2340 * Change the default value of the TCP_gamma constant (maximal size of TCP
2341 congestion window) to a more realistic 4MiB value. If you notice changes in
2342 your simulation results, you can fall back to the previous 20k tiny window
2343 by adding --cfg=network/TCP_gamma:20000 on command line.
2344 * (Hopefully) fix a bug wrt periodic availability and state traces
2345 * Bug fix: use default values at start when first event in availability/state
2346 trace is not at time 0.
2349 * remove the "new_" part of function name sg_platf_new_trace_connect
2350 (resulting in sg_platf_trace_connect), since it does not create
2354 * Kill synchronized dynars, and xbt_dynar_dopar(). We cannot think of a
2355 use case where it's really mandatory, and maintaining it was a pain in
2357 * New: xbt_fifo_search(), search an item with a user-provided
2358 comparison function instead of dumb pointer comparison.
2361 * Fix the lua deployment:
2362 Use `simgrid.init_application()` before deployment instead of
2363 `simgrid.msg_register_application()` after.
2366 * Transfer the tracing files into the corresponding modules.
2368 -- Tue Feb 5 11:31:43 CET 2013 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2370 SimGrid (3.8.1) stable; urgency=low
2372 The "we are told that some people want to also *install* the simgrid
2375 * Add missing file "tesh.1" to the archive.
2377 -- Sat Oct 27 16:12:11 CEST 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2379 SimGrid (3.8) stable; urgency=low
2381 The Psssshiiiit release: SimGrid jumps into the Cloud.
2384 * Add an experimental interface to manipulate VMs. They are mainly
2385 process groups with very few intrinsic semantic, but they should
2386 allow you to build the semantic you want easily.
2387 * New function: MSG_host_set_property_value()
2388 * New function: MSG_process_on_exit(). To clean memory in all cases.
2389 * Bug fixes that made the host (and link) failures unusable.
2390 * Add a way to auto-restart process when the host in which they are
2391 executing comes back (ON_FAILURE="RESTART" on deployment file,
2392 MSG_process_auto_restart_set).
2393 * Use the "msg_" prefix for all datatypes (instead of m_, msg_ and MSG_),
2394 please stop using the old ones, they are DEPRECATED.
2396 * Deprecate functions MSG_global_init() / MSG_global_init_args()
2397 Please use MSG_init() instead. (reducing the amount of entry
2398 points in the library helps us).
2399 * Make it impossible to link against the wrong version of the lib
2400 * Deprecate MSG_clean(). No need to call it anymore.
2401 * Function MSG_get_host_number() is not deprecated anymore.
2404 * Split the doc into a user guide and a reference guide.
2405 * Start a developper guide to help people hacking on SimGrid.
2408 * Enable tracing by default. This modules rocks you should use it.
2409 * Remove option custom_flags. Now use environment variables CFLAGS
2411 * Use default cmake things to detect lua instead of home grown ones.
2412 * New option "enable_mallocators" to disable mallocators, for debugging
2413 purpose ("on" by default).
2416 * Bug fixes around the resource failures: don't let the processes
2417 survive the host they are running onto.
2418 * Add an interface to auto-restart processes when the host in which they are
2419 executing comes back.
2420 * Ensures that SIMIX_clean is called automatically. It's not part of
2421 the public interface anymore (bindings should be updated).
2424 * Bug fix for when SD_Simulate is called with a positive value: be careful
2425 when comparing doubles. Sometimes they are different for non significant
2427 * New types of typed tasks. SD_TASK_COMP_PAR_AMDAHL represents a
2428 parallel task whose initial work is distributed among host according
2429 to the Amdahl's law. Such tasks are created with a parameter alpha
2430 that corresponds to the non-parallelizable part of the computation.
2431 SD_TASK_COMM_PAR_MXN_1D_BLOCK represents a complex data redistribution
2432 between two sets of workstations assuming a 1D block distribution (each
2433 workstation owns a similar share of data) on both sides.
2435 These tasks can be scheduled with SD_task_schedulel or SD_task_schedulev.
2436 Data redistribution will be automatically scheduled once parent and child
2437 are both scheduled. The filling of computation_amount and
2438 communication_amount structures is now done seamlessly thanks to the chosen
2440 * New function SD_workstation_dump to display various information
2441 * New function SD_task_set_rate to throttle the bandwidth allowed to be used
2442 by a SD_TASK_COMM_E2E typed task. This rate depends on both the nominal
2443 bandwidth on the route onto which the task is scheduled and the amount of
2445 To divide the nominal bandwidth by 2, the rate then has to be:
2446 rate = bandwidth/(2*amount)
2447 * Compute tasks that have failed can now be rescheduled and executed again
2448 (from their beginning)
2449 * Increasing source code coverage (src/simdag is now covered at 95.8%
2453 * Re-implement time-independent trace replay using SMPI (at the
2454 smpi_smp_* level) instead of MSG. This should replace
2455 examples/msg/actions/actions.c
2456 * Implement support of MPI Datatypes (vectors, hvectors, indexed,
2457 hindexed and structs)
2458 * Implement the exchange of non-contiguous data.
2459 [Khalid Hasanov & Jean-Noel Quintin] Thanks for the patch, guys.
2460 * Correct behavior of smpi/sender_gap and set its default value to 0
2461 * Add option to asynchronously send small messages to allow better
2462 simulation of pt2pt communications. --cfg=smpi/async_small_threshold:value
2463 specifies the size in bytes under which messages will be asynchronously sent.
2464 * Add support of MPI_Iprobe, MPI_Probe, MPI_Testall, MPI_Wtick functions
2465 * SMPI now handles more MPI specific values in input. Closes [#14389] and [#14388]
2468 * New C interface to define a platform: XML is now optional.
2469 For more info, please check include/simgrid/platf.h.
2470 * New interface to define random platforms from the C:
2471 For more info, please check include/simgrid/platf_generator.h and
2472 examples/msg/masterslave/masterslave_platfgen.c
2473 * Export a sg_cmdline dynar containing all the arguments we got from
2477 * Two new tracing options for adding comments to trace file so you
2478 can track your experiments (see --help-tracing for details).
2479 * New option to generate an impoverished trace file (--cfg=tracing/basic:1)
2480 * Adding the SimGrid version that generated the trace file as a comment.
2481 * Instrumenting other MSG functions (MSG_task_isend_with_matching and MSG_task_dsend)
2482 * Fix to avoid key clashes on Paje links
2483 * Other minor fixes related to the Paje specification
2486 * Functions xbt_dict_hash() and xbt_dict_hash_ext() are made public,
2487 and renamed to xbt_str_hash() and xbt_str_hash_ext().
2488 * New function: xbt_os_timer_resume() to restart a timer w/o resetting it.
2489 * Greatly improve the robustness of mmalloc to user errors (such as
2490 using an area after freeing it, or freeing it twice)
2492 -- Thu Oct 25 17:30:06 CEST 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2494 SimGrid-java (3.8.1) stable; urgency=low
2496 * New module: org.simgrid.trace.Trace (SimGrid trace bindings)
2497 Warning: all methods are visible, but only some of them are
2498 implemented so far. Check the source (src/jtrace.c)
2499 for further information.
2500 * New module: org.simgrid.msg.File (SimGrid File management functions)
2501 * New Module: org.simgrid.msg.VM (SimGrid interface to mimick IAAS clouds)
2502 * Change the meaning of Process.restart: now restart the process from
2503 the beginning, like MSG_process_restart in C.
2504 * Add Process.setAutoRestart: handling of process restart when failed
2506 * Add Process.getProperty, Host.getProperty, Host.getProperty: allows
2507 you to retrieve the properties of the processes/hosts
2508 * Deprecate Msg.clean(): you can just forget about it now.
2509 * New function Process.getCount(), that only works when compiling
2510 with the not yet released version 3.9 of the C library.
2512 * New context factory based on Coroutines. It mandates a modified JVM
2513 but then, the simulations run about five times faster, and there is
2514 no limit to the amount of processes (beside of the available memory).
2516 -- 2012-12-04 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2518 SimGrid (3.7.1) stable; urgency=low
2521 * Restore the prototype of MSG_process_create_with_environment() to
2522 the pre-3.7 situation by removing the kill_time argument.
2523 * Add a MSG_process_set_kill_time() function instead.
2526 * Fix weird behaviors when dealing with parallel tasks.
2529 * Simgrid is now built as a dll.
2530 * Simgrid-java now works on Windows.
2531 * Simgrid-Java is now included into Windows package.
2534 * First pre-build package for MacOSX.
2537 * Fix compilation when using MSG_USE_DEPRECATED.
2538 * Fix some compilation issues on Macs and Windows.
2539 * Reduce the number of failing tests on exotic systems, like Debian/Hurd.
2540 * Environment variables CFLAGS and LDFLAGS are now honored by cmake.
2542 We discovered that the Lua console is broken, but we are missing the
2543 manpower to fix it right now. The problem existed in 3.7 too, so we
2544 are not blocking the release for that. Sorry if you depended on this
2545 feature, any help would be really welcome.
2547 -- Thu Jun 7 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2550 SimGrid-java (3.7.1) stable; urgency=low
2552 The "Java aint got to be bloated and slow" release
2555 * Various internal cleanups and performance improvement
2556 Simulations are expected to run up to twice faster or so
2557 * Make Process.kill(process) an instance method, not a static one
2558 * User processes are not java.lang.Thread subclasses.
2559 This breaks the compatibility (sorry), but previous API was
2560 brain-dead, making it impossible to have non-trivial
2561 initializations in the process constructor.
2562 * Require a full constructor per Process sub-class.
2563 Kinda breaks the compatibility (sorry), but this allows a much more
2564 efficient way to launch the processes at simulation startup.
2565 * Do not embeed our version of semaphores, java 1.5 can be considered
2566 as sufficiently prevalent for us to not dupplicate its features.
2570 * Add examples for almost every part of the API
2571 We spotted and fixed a lot of bugs in the process
2573 * New module: asynchronous communication API
2574 * New function: Process.sleep()
2575 It takes milliseconds as argument, just as java.lang.Thread.sleep()
2576 * New module: org.simgrid.msg.Mutex (SimGrid mutexes)
2577 * New module: org.simgrid.msg.RngStream (RngStreams random generators)
2579 -- 2012-06-12 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2581 SimGrid (3.7) stable; urgency=low
2583 The "spring cleanups (before the next Big Project kicks in)" release.
2586 * We can specify the SMPI latency/bandwidth factor with command line
2587 add --cfg=smpi/bw_factor:"threshold0:value0;...;thresholdN:valueN"
2588 or add --cfg=smpi/lat_factor:"threshold0:value0;...;thresholdN:valueN"
2589 You can also use the "config tag" from platform file by adding this line
2590 <prop id="smpi/bw_factor" value="threshold0:value0;...;thresholdN:valueN"></prop>
2591 (see "example/platforms/tag_config.xml" to use "config tag").
2592 Note that the command line supersedes the platform file configuration.
2593 * Change the correction factors used in LMM model, according to
2594 the latest experiments described in INRIA RR-7821.
2595 Accuracy should be improved this way.
2596 * Use the partial invalidation optimization by default for the
2597 network too. Should produce the exact same results, only faster.
2598 * Major cleanup in surf to merge models and split some optimization
2599 mechanisms from the core of the models. As a result you can now
2600 specify which model to use (e.g., --cfg=network/model:LV08
2601 --cfg=cpu/model:Cas01) and which optimization mode to use
2602 (e.g., --cfg=network/optim:lazy --cfg=cpu/optim:TI).
2603 Incompatible combinations should err at initialization. See
2604 --help-models for the list of all models and optimization modes.
2605 * The CLM03 workstation model was dropped for simplicity because it
2606 used the deprecated CM02 network model. Use default instead.
2607 * Rename the TCP_gamma configuration option to network/TCP_gamma
2608 * Rename the coordinates configuration option to
2609 network/coordinates, and document it
2610 * Use now crosstraffic keyword instead of the terribly misleading
2611 fullduplex keyword. It is activated by default now in the current
2612 default model, use --cfg=network/crosstraffic:0 to turn it off.
2613 * Ongoing refactoring the model parsing to make XML files optional
2614 See include/simgrid/platf.h for details (still to be completed)
2617 * Major overhaul of the documentation. Almost instructive now :/
2618 * Deprecate the use of m_channel_t mechanism like MSG_task_{get,put}
2619 functions and friends. This interface was considered as
2620 deprecated since over 2 years, it's time to inform our users that it is.
2621 Switch to MSG_task_{send,recv} instead, or compile SimGrid command line
2622 'cmake -Dcustom_flags="-DMSG_USE_DEPRECATED" .' if you really need to
2623 use these (crappy) functions in your code.
2624 These functions will be removed soon. Stop using them now.
2625 * Deprecate MSG_get_host_{table,number}
2626 Implement MSG_hosts_as_dynar() instead.
2627 * Implement MSG_processes_as_dynar() (Closes gforge #13642)
2628 * Remove the public field msg_host_t->name. Use MSG_host_get_name()
2631 * Stabilize the parallel execution mode of user contexts
2632 * Introduce configuration variables to control parallel execution:
2633 - contexts/synchro: Synchronization mode to use when running
2634 contexts in parallel (either futex, posix or busy_wait)
2635 - contexts/parallel_threshold: Minimal number of user contexts
2636 that must be part of a scheduling round to switch to parallel
2637 execution mode (raw contexts only)
2638 * Fix bugs that prevented to use suspend/resume along with
2639 synchronization structures.
2640 * Fix bugs in process termination that lead to invalid memory access
2641 in very specific conditions.
2644 * Introduce a parallel mode for the models (controlled by surf/nthreads
2645 configuration item). In our tests, running the models in parallel
2646 never lead to any speedups because they are so fast that the gain
2647 of computing each model in parallel does not amortizes the
2648 synchronization costs, even when ultra fast futexes are used.
2649 This is released anyway because YMMV.
2652 * Performance boost by using a swag internally to compute the set of
2653 tasks that are finished and should constitute the return value of
2657 * Enable it by default now that it is considered rather stable.
2660 * Documentation of the tracing functions.
2661 * Performance gains when tracing categorized/uncategorized resource
2662 utilization by avoiding calls to get route when updating resource
2663 variables. LMM constraints are being used instead.
2664 * API changed to set task categories. Use MSG_task_set_category instead
2665 of TRACE_msg_set_task_category, and SD_task_set_category instead
2666 of TRACE_sd_set_task_category. They only work if ENABLE_TRACING is ON.
2667 * Bugfix for graphicator, routes not correctly obtained, memory leaks
2668 * Examples for link user variables added (see at examples/msg/tracing/)
2669 * Deprecated function TRACE_msg_set_process_category completely removed
2670 * Trace header updated according to the latest Paje file format
2671 * Tracing network lazy updates, no longer obligate users to use full updates
2672 * --cfg=tracing/platform:1 also registers power/bandwidth variables
2673 * Experimental: let user code declare/set/push/pop application states for hosts
2674 * API changed to allow the manual creation of graph configuration files
2675 for Triva. See TRACE_get_node_types() and TRACE_get_edge_types().
2678 * Improve the API of Lua MSG bindings, using the Lua spirit.
2679 * Each simulated process now lives in its own Lua world (globals are
2680 automatically duplicated). It helps writing simulators. Will allow
2681 to run Splay programs within SimGrid in the future.
2682 * Add a Chord example in Lua, equivalent to the MSG one.
2685 * Start the implementation of a solution to express temporal
2686 properties, not only local assertions. This is still an
2687 experimental work in progress, stay clear from it to be safe.
2691 - Add new runtime parameters --help-logs and --help-log-categories
2692 to display information about supported logging parameters and
2694 - Old deprecated parameters --{gras,surf,msg,simix,xbt}-log=...
2695 don't exists anymore.
2696 * Mallocators: allow value NULL for the reset function.
2698 - New function xbt_dict_new_homogeneous(void(*)(void*)) to
2699 create homogeneous dictionaries, where all the elements share the
2700 same free function. Non homogeneous dictionaries will be
2701 deprecated in the next release.
2702 - Dicts of scalar elements (xbt_dicti_*) are deprecated.
2703 - Multi-level dictionaries are deprecated.
2705 - new function xbt_dynar_search_or_negative() that is useful when
2706 you have less than 2 million elements in your dynar and don't
2707 want of the extra complexity of catching exceptions when the
2708 element is not found.
2710 - Make xbt_os_thread module (for thread portability) public.
2711 Documentation is still to come, sorry.
2713 - Cleanups and simplifications to make it maintainable again.
2714 - Exotic features (such as memalign and valloc) were removed.
2715 - The metadata were extended and improved so that the
2716 model-checker becomes able to explore and inspect the heaps.
2717 - This may induce a performance drop when enable_model-checking is
2718 ON in cmake (even if it's not used in the simulation), but it is
2719 necessary at this point to get MC working.
2721 Turn model-checking OFF if simulation performance matters to you.
2722 Not enabling it at runtime is not enough, disable it in cmake.
2724 -- Tue May 15 11:30:19 UTC 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2727 SimGrid (3.6.2) stable; urgency=low
2729 The "Not coding new stuff allows to polish old things" release.
2732 * New bindings to the NS3 packet level simulator (experimental)
2733 * Use the raw (efficient) execution contexts instead of the sysv
2734 (portable) ones when possible.
2735 * libpcre is now mandatory in any cases since not using it led to
2736 severe performance loss and possibly other issues
2737 * Update the XML platforms:
2738 - G5K: include the latest machine in Nancy
2739 - GridPP and LCG: new platforms
2740 * Documentation was partially updated, at least (more to come)
2742 Bug fixes, cosmetics and small improvements
2743 * Free terminated processes before the end of the simulation to avoid
2744 exhausting the memory of users having very dynamic amount of
2746 * Bug fix and cosmetics about canceling non-running tasks
2747 * Bug fix about the dot loader's issues when using libcgraph
2750 * Create an installer for windows with nsis (amd64 and win32)
2751 - Add an hello world project to illustrate simgrid project creation.
2752 - Embed libpcre into the Simgrid installer to avoid
2753 its compilation burden
2754 * The raw execution contexts should work on Apple now
2755 * Port to Windows 64 bits
2756 - Sysv contexts now have an implementation for this arch
2757 - GRAS communication features now support this arch
2758 * Drop support for borland compiler on windows
2759 - this code was not maintained, and we kinda depend on gcc nowadays
2760 * Fix portability issues on kfreebsd/gnu: build error about semaphores
2761 * Fix portability issue on unstable ubuntu: linker became picky on
2764 -- Wed Oct 5 15:51:01 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2766 SimGrid (3.6.1) stable; urgency=low
2768 The "Oops, we broke Macs too" release
2771 * Fixed contexts detection so that raw ones are used when possible
2772 * On Mac, do not use Posix Ucontexts with gcc v4.[1-5] since this
2773 leads to a strange error, with user code segfaulting sometimes when
2774 the generated code is not perfectly aligned (which is not
2775 controllable from the user side, depends on the amount of code)
2778 * New macro: CATCH_ANONYMOUS, which is like CATCH(e) but without argument.
2780 -- Mon Jun 27 13:59:03 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2782 SimGrid-java (3.6) unstable; urgency=low
2785 * Split of every thing from simgrid v3.5 into a separate package.
2787 -- 2011-10-05 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2789 SimGrid (3.6) stable; urgency=medium
2791 The Summer Release, also known as the "OMG! They Killed Kenny!" version
2794 * Bindings now constitute their own package, separated from the main one.
2795 Rationale: reduce our maintenance nightmare by reducing the module coupling
2796 They will soon be released on their own on gforge.
2798 svn co svn://scm.gforge.inria.fr/svn/simgrid/contrib/trunk/simgrid-java
2799 svn co svn://scm.gforge.inria.fr/svn/simgrid/contrib/trunk/simgrid-ruby
2801 GRAS: It is not considered as stable anymore, but experimental. Sorry.
2802 * It's not quite deprecated for now because we have no replacement,
2803 but it may soon become the case.
2806 * New MPI functions supported: MPI_Comm_disconnect, MPI_Comm_get_name
2807 * Fortran: New user-level cache variable to store the rank of the running
2808 process. This improves performance by an order of magnitude.
2809 * C: New coccinelle script to automatically locate and modify global and
2810 local static variables.
2811 * Improved SMPI network model with a sender-side gap to account for multiple
2815 * New function MSG_comm_get_status(). MSG_comm_test() and MSG_comm_testany()
2816 only say if a communication is finished, no matter whether it succeeded or
2817 failed. You can call MSG_comm_get_status() to know the status of a finished
2819 * New function MSG_task_dsend() to send a task and detach it. When a
2820 communication is detached, you are never notified of its success or failure
2821 and the memory is released automatically once it is finished. This function
2822 is useful when you don't care about the end nor the success of a
2824 * Change the prototypes of action replay. Sorry for inconvenience,
2825 but this is really more efficient this way (and to adapt your code,
2826 you just have to fix the initialization, that shouldn't be too long)
2827 * Kill the braindead MSG_task_refcount_dec() function. I guess nobody
2828 ever managed to do anything useful with it.
2829 * New function MSG_comm_testany(). Similarly to MSG_comm_waitany(), it
2830 takes a dynar of communications. It returns immediately and gives the
2831 index of a finished communication (if any).
2832 * New example: a basic implementation of the Chord P2P algorithm.
2835 * New model for multi-core CPUs. You can now use the core attribute to
2836 precise the number of cores of a host. This is a basic model. Every
2837 process running on the host receives at most the power provided in
2838 the DTD (throughput<=power). Total throughput of process cannot exceed
2840 * New peer tag. This peer tag creates a tiny AS comprising a host and a
2841 router linked by an up-link and a down-link (possibly asymmetrical).
2842 This kind of pattern allows to easily build last-mile model style platforms.
2843 Aggregating such patterns in a rule-based AS is thus the technique of
2844 choice for modeling large peer-to-peer/volunteer computing/cloud platforms.
2845 * New model for Vivaldi routing. We transformed the Vivaldi network model
2846 into a Vivaldi routing model (based on the rule-based model). This allows to
2847 combine Vivaldi based latencies with last-mile platforms.
2850 * Added a check for NaN of IEEE754 infinite in the double entries of
2852 * Introduce a new context factory "raw", highly inspirated from the
2853 ucontext factory, but using manually crafted functions in assembly to
2854 do the work in an efficient manner.
2855 * Allow to change the used context factory at run time, not only at
2856 compilation time. Use --cfg=contexts/factory:raw for maximal speed.
2857 * Add an option --cfg=contexts/stacksize:N to set the stack size of the user
2858 contexts at runtime (only with raw contexts or ucontexts).
2859 * Completely rewrote this module to allow parallel execution of user
2860 processes. Use --cfg=contexts/nthreads:N to execute user processes
2861 with N parallel threads (the default is 1, meaning no parallelism).
2862 * Allow to decide dynamically between sequential and parallel modes.
2863 When nthreads > 1, you can use --cfg=contexts/threshold:P to run the user
2864 processes in parallel only when their number is greater than or equal to P
2866 * Added a check for NaN of IEEE754 infinite in the double entries of
2870 * New command line option: if you pass --cfg=verbose-exit:0, SimGrid
2871 won't output the state of processes when interrupted with Ctrl-C
2872 * Add a new function xbt_dynar_to_array that transforms a dynar into a
2873 NULL-terminated array. This may solve backward compatibility issues
2874 due to the change to return type of SD_simulate. See also:
2875 http://lists.gforge.inria.fr/pipermail/simgrid-user/2010-December/002206.html
2876 * Add new macros with variable number of arguments.
2877 - in xbt/log.h: XBT_DEBUG, XBT_VERB, XBT_INFO, etc.
2878 - in xbt/asserts.h: xbt_assert
2879 - in xbt/cunit.h: xbt_test_{add,fail,assert,log}
2880 - in xbt/ex.h: THROWF and RETHROWF.
2881 Define XBT_USE_DEPRECATED if you want to use the old numbered macros like
2883 * Change xbt_die() to accept a format string with arguments, just like printf.
2884 * New data structure: xbt_lib_t, like a dict but more general and with better
2888 * New configuration options
2889 Options triva/categorized and triva/uncategorized can be used to generate
2890 graph configuration files for Triva visualization tool.
2891 * Configuration option tracing/platform is renamed to tracing/categorized
2892 * XBT logging makes tracing error checks easier, new root log hierarchy: instr
2893 * New TRACE_user_link_variable interface:
2894 User provides the name of the link and the tracing variable to attach to it
2895 * the declaration of tracing categories must be done after the environment
2897 * simpler tracing interface, just one way to declare categories
2898 TRACE_category or TRACE_category_with_color, it is up to you
2899 * links in the trace file are again identified by their names
2900 * trace contains the full platform hierarchy exactly as declared using the ASes
2901 * Options tracing/msg/[task|process]:1 groups the process by hosts
2902 for both cases, tasks and processes must have names that are unique during the simulation
2903 these options generate traces that are suited to gantt-charts, such as the space-time view of Paje
2904 * The experimental option tracing/msg/volume is deprecated
2905 its functionality may be reincorporated if needed
2907 The tracing generates a trace file with unordered timestamped events,
2908 because of the way the core simulator (surf) works. A script available
2909 at the tools directory (fix-paje-trace.sh) can be used to put the events
2910 in order. We have changed the tracing so it can generate ordered timestamped
2911 events in the final trace, but depending on the simulator (and how much time
2912 is simulated) that can lead to a huge memory utilization. It is deactivated
2913 by default, but it can be activated using the --cfg=tracing/buffer:1 switch.
2915 Build Infrastructure
2916 * Define a SIMGRID_VERSION macro in simgrid_config.h.
2917 - We are trying hard to keep the API stable, but it may happen that
2918 some things change (we're a research project after all, not a
2919 nuclear plant operating system). If such things should happen, you
2920 could rely on that macro to adapt.
2921 - current value: 30600 for 3.06.00, aka 3.6
2922 * Define macro MAKE_SIMGRID_VERSION(major, minor, patch) to help building
2923 a number that can be compared with SIMGRID_VERSION.
2924 * Add a build option -Denable_debug (set to ON by default): when set to OFF,
2925 assertions and verbose/debug logging events are disabled at compile time.
2927 -- Tue Jun 21 08:57:43 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2929 SimGrid (3.5) stable; urgency=medium
2932 * New feature to any SimGrid-based simulator: Model-Checking
2933 Check SIN#1 for more details.
2936 * New Model SMPI (three-interval linear regression for correction factors)
2937 See RR-7426, available at http://hal.inria.fr/inria-00527150
2938 * Ability to use FORTRAN MPI code (through f2c, automatically privatized)
2939 * New MPI functions supported: MPI_Get_count(), MPI_Comm_split()
2940 * New: RAM folding (see RR-7426 and examples/smpi/NAS/DT-folding)
2941 * New: execution sampling (see RR-7426 and examples/smpi/NAS/EP-sampling)
2942 * See also src/smpi/README
2947 - Tracing API changes: TRACE_start and TRACE_end should not be called
2948 by user-code. They are automatically called by simulators created
2949 with SimDAG, MSG and SMPI if the toolkit is compiled with
2950 tracing_enabled=ON. Categories declaration and utilization remain the
2951 same for MSG and SimDag.
2952 - A function was added to the tracing API to declare categories with
2954 - TRACE_category_with_color (char *category, char *color)
2955 where color must be in the following format
2956 "%f %f %f", red, green, blue
2957 and red, green, blue are float values in the interval [0, 1]
2958 - User can specify NULL as color parameter, or continue calling
2959 TRACE_category (cat)
2960 On that case, the tracing system will define random colors
2961 - The following command-line options are supported:
2962 --cfg=tracing/filename:msg.trace
2963 --cfg=tracing:1 (activate tracing, needed to use others)
2964 --cfg=tracing/platform:1 (categorized resource use)
2965 --cfg=tracing/uncategorized:1 (uncategorized resource use)
2966 --cfg=tracing/msg/task:1 (task creation)
2967 --cfg=tracing/msg/process:1 (process creation, migration)
2968 --cfg=tracing/msg/volume:1 (volume of MSG send/recv)
2969 --cfg=tracing/smpi:1 (SMPI interface tracing)
2970 --cfg=tracing/simdag:1 (allow SimDAG tasks receive categories)
2971 - examples of examples/msg/tracing updated
2973 - DAXLoader and DOTLoader functions can generate tasks with categories
2974 - A new function to attribute a category to SD tasks:
2975 TRACE_sd_set_task_category (SD_task_t task, char *category)
2976 * Tracing the MPI interface implemented by SMPI
2977 - Collective operations are traced with states
2978 - Point-to-Point operations are traced with states/links
2979 - Tracing activated by a parameter "-trace filename" passed
2980 to smpirun during execution (considering that simgrid
2981 is compiled with tracing enabled)
2982 - To run the simulation with gdb, the simulator
2983 accepts --cfg=tracing/smpi:1 to trace SMPI
2984 - tesh files to check if smpi tracing is ok
2985 - See examples/smpi/NAS/DT-trace
2986 * GTNetS tracing re-worked
2987 - adaptation to the tracing system of GTNets to cope
2988 with modifications regarding the fullduplex mode
2989 - new tesh files to check if gtnets tracing is ok
2992 * Asynchronous communications through the functions:
2993 MSG_task_isend/irecv and MSG_comm_test/wait/waitall
2994 * New function: MSG_load_platform_script()
2995 to make possible using a lua script instead of XML files to set up platforms
2996 * New function: MSG_set_function
2997 to associate functions to processes, used when bypassing the parser
2998 * New functions: MSG_task_set_name(), MSG_task_set_compute_duration()
3000 Platforms: Add some more examples in examples/platforms
3001 * Grid'5000: see www.grid5000.fr
3002 * *_30000_hosts.xml: various huge files [mainly scalability testing]
3005 * Change the XML format. This is a very important modification. SimGrid
3006 3.5 introduces a new hierarchical format based on the notion of
3007 Autonomous Systems. Compatibility with old format is ensured
3008 through the perl script provided in the install bin directory
3009 bin/simgrid_update_xml.
3010 It is now possible to build platforms with specific routing
3011 mechanism (Full/Dijkstra/DijkstraCache/Floyd) and to easily
3012 connect several platforms together. We will try to provide soon
3013 set of realistic platforms exploiting these properties (have a
3014 look at examples/platforms/ for the moment).
3015 * Take the opportunity of the XML format change to be a good XML citizen:
3016 rename link:ctn to link_ctn and similar changes (also dealt with by
3018 * Add a new routing scheme (rule-based) using regular expressions. It
3019 enables to have an extremely low memory footprint when the
3020 underlying routing is simple and can be compactly described. You
3021 need to have libpcre4-dev (perl regular expressions) installed if
3022 you want to use this routing scheme.
3023 * Revive the cluster TAG and allow to easily and efficiently (both in
3024 term of memory and speed) connect clusters together. Have a look
3025 at teshsuite/simdag/platforms/ to see how this can be done. With
3026 this tag, you can create clusters with thousands of tasks at no
3027 cost (have a look at examples/platforms/).
3028 Note: clusters are implemented as ASes, so there is no need for an
3029 enclosing AS tag if you have only one cluster in your platform.
3030 * Add new generic functions in the public interface that allows the user
3031 to call SURF 'create_resource' methods from your code (same
3032 functionality as the XML bypass mechanism but with a much lighter
3034 * Add a new model (enabled through command line --cfg=network/model:SMPI)
3035 that uses a piecewise linear approximation to produce better
3036 results when exchanging small messages.
3037 * Add a new parameter to handle correctly full duplex link and account
3038 for interferences between uplink and downlink communications
3039 (activate with --cfg=fullduplex:1).
3042 * Rename the SD_READY (all dependencies are satisfied and task is
3043 scheduled) state in SD_RUNNABLE and define a new SD_SCHEDULABLE (all
3044 dependencies are satisfied) state.
3045 This prevents a confusion between the notion of "ready to schedule"
3046 (SD_SCHEDULABLE) used in DAG scheduling and that of "ready to be
3047 simulated" (SD_RUNNABLE) used by the simulation kernel.
3048 * Change the way a task is considered as ready. Instead of removing
3049 dependencies when a task is done, a counter is decreased. This way,
3050 it is always possible to reach ancestors thanks to the
3051 SD_taks_get_parents function (even after the end of the simulation.)
3052 * Change the return type of SD_Simulate from (SD_task_t*) into
3053 xbt_dynar_t. This function was in handling a dynar internally and
3054 converted it into a NULL terminated array for historical reasons.
3055 * New function SD_dotload(char*) to load a DAG described in dot
3056 format. This loader and the corresponding examples require the
3057 installation of the graphviz library.
3058 * Fix a bug in the management of tasks of size 0 in the surf network
3059 models. This problem was only visible with SIMDAG and you should
3060 thus disregard results produced with earlier versions if you
3061 relied on this feature (some tasks were blocked because of this).
3062 * Fix a bunch of stuff that prevented to use classical models with SIMDAG
3063 even though your applications were doing only point-to-point
3064 communications and sequential computations. Now you can really use any
3065 model you want (of course, if you create real parallel tasks, which are
3066 not implemented in most models beside ptaskL07, this will abort).
3067 * Add an example that schedules a DAX on an heterogeneous platform
3068 using a Min-Min strategy.
3069 * New function SD_workstation_get_current_task() that returns the kind
3070 of task currently running on a workstation in the sequential access
3072 * Raise some warnings when unexecuted tasks remains at the end of the
3073 simulation. This is usually caused by cycles in the DAG.
3076 * New function: SIMIX_process_set_function() called by MSG_set_function
3077 * Change the underlying waiting queue in semaphores so that a process
3078 can wait on several of them simultaneously (as in waitany).
3079 * Fix the way to handle tokens in semaphores so that all access patterns
3080 work: {acquire, acquire_timeout, waitany} / {release, release_forever}.
3081 * kill the dirty pimple SIMIX_message_sizes_output()
3082 Please use (proper) visualization instead
3085 * New data container: setset (set of sets of elements)
3086 * New module: mmalloc (mapped malloc, allowing to have several
3087 independent segments of malloc)
3088 * New function: xbt_dict_cursor_set_data()
3089 * New functions: xbt_dynar_sort(), xbt_dynar_compare()
3090 * New function: xbt_dynar_is_empty()
3091 * New function: xbt_fifo_get_last_item()
3092 * Fix xbt_dynar_shrink(): use the right element size.
3093 * Fix xbt_dynar_set*(): allow index larger than current size and memset 0
3094 uninitialized areas during expand.
3095 * Fix semaphores: previous implementation was severely broken.
3096 * Use library init/fini functions for our initialization.
3097 - you can use logs and other feature as soon as you want in your
3098 code (even before the xbt_init / MSG_init)
3099 - xbt_exit is now a no-op and produce a warning when used.
3102 * Port GRAS to new SIMIX mechanisms. This allows gras users to
3103 benefit from the latest improvement to the simulation kernel.
3104 * Kill measurement sockets for now. If you rely on them, sorry. This
3105 release is not for you. This feature will be reintroduced in the
3106 future, but we cannot delay the release any further.
3107 * New function: gras_msgtype_get_name().
3108 * Implement gras_agent_spawn in RL too (the prototype changed a bit)
3109 * Fix (at last) the pmm example: it should not randomly fail anymore.
3111 Build chain: bug fixes and overall polishing
3112 * Cmake is now stable enough. Hence, we killed the autotools.
3113 * Port to windows ( TM :)
3114 * Fix the 'make install' target.
3115 No need to use 'make install-simgrid' anymore
3116 * Introduce a 'make dist' target compiling a *source* archive
3117 'make package' compiles a binary archive
3118 * Compile java files only on need
3119 * Add --cd and --setenv command line options to tesh
3120 * Out of source builds are not fully supported yet, but we are close
3121 * Enable supernovae and optimization flags by default for our users
3124 * Add layer to set up environment directly from lua, without XML.
3125 * The effect of gras_stub_generator can be achieved through
3126 lua too (check examples/gras/console/ping_generator.lua)
3128 -- Wed, 01 Dec 2010 22:09:23 +0100 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
3130 SimGrid (3.4.1) stable; urgency=low
3132 The "Polishing easter eggs is probably a good idea" release.
3133 This is a bug fixes release only.
3137 * Fix a bug preventing the tasks from begin garbage collected.
3140 * Fix a bug occurring when a host involved in a communication fails.
3141 This was not detected properly by the other peer involved in the
3142 communication. Now, it's reported as a network error.
3145 * Warn the user about loop dependencies in data flow of DAX files
3146 * Obey the control-flow dependencies of DAX files
3149 * Add option "enable_smpi" allowing to not compile SMPI.
3150 Probably useful for the (Mac) users experiencing a build error here
3151 * Improve the detection of lua5.1 and ruby1.8
3153 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Tus, 04 May 2010 28 16:11:16 +0100
3155 SimGrid (3.4) stable; urgency=low
3157 The "Easter in Cargese" release. Also known as (major changes):
3159 * the "se habla Java, Ruby 話せます, fala-se Lua (and deaf-friendly)"
3160 ~> bindings were greatly improved
3161 ~> new tracing infrastructure for better visualization introduced
3163 * the "Welcome to configury modernity" release.
3164 ~> we switched from autotools to cmake, and improved our cdash
3167 A more detailled list of changes follow (full detail in svn log).
3169 Java Bindings: Various Cleanups
3170 * (install java-gcj-compat-dev on debian-like to use them)
3171 * Remove put/get: no need to export deprecated interface in Java
3172 Use send/receive instead.
3173 * Cleanup the examples and add a README per directory
3174 * Remove example autoDestination (that's the only way to go now)
3175 * Remove example explicitDestination (was a plain copy of basic)
3176 * Make JniException a runtime exception, so that there is no need to
3177 declare the fact that you may encounter such a beast. I guess that
3178 nobody will ever want to survive such error.
3179 * Create specific errors for each MSG case of failure:
3180 host failure, transfer failure, timeout, task cancelled
3181 * Cleanup the exceptions that may get thrown by each function
3182 * Other internal cleanups in Java bindings. Performance still bad :/
3183 Ruby and Lua Bindings: create them
3184 * (install ruby1.8-dev/liblua5.1-0-dev on debian-like to use them)
3185 * That's new and great, you should try them out.
3186 Same functionalities than Java bindings, only even less polished
3188 * Kill the useless "rate" argument of SD_task_get_execution_time()
3189 Everyone used to provide -1 as a value, it was not used, and the
3190 semantic of a possible use wasn't even clear.
3191 * SD_SCHED_NO_COST: Constant to use as cost in SD_task_schedule()
3192 either as comm costs or compute costs to mean that there is no
3193 such thing for that specific task.
3194 * Add a SD_task_set_name() function
3195 * Fix SD_task_unschedule() on typed tasks
3196 * Fix SD_task_get_execution_time() to return seconds, not flop*sec
3197 * In DAX loader, accept useless 'level' attributes to <job> since
3198 LIGO DAGs have them (seem to be to ease graphical representation).
3200 * Add an example masterslave_mailbox.c using send/receive and not
3201 the deprecated put/get interface.
3202 * Kill the MSG_paje_output() function. It's a noop since 2 years.
3203 * Kill MSG_WARNING and MSG_FATAL return codes: they were not used
3205 * Rename MSG_TIMEOUT_FAILURE into MSG_TIMEOUT for sake of logic
3206 (declare MSG_USE_DEPRECATED to still have the old name)
3207 * Add a MSG_task_set_data() function
3208 * About trace replay (see examples/msg/actions):
3210 - Allow to work with splitted trace files for each process
3211 Give the specific trace file as argument of each process,
3212 and call MSG_action_trace_run(NULL)
3213 You can still have one merged file for all processes.
3214 - Fix implementation of collective operations
3215 * Allow task_execute() on 0-sized tasks (closes #10063)
3217 * This is the first release of SimGrid where SMPI is not considered
3218 beta anymore (even if some corners should still be improved)
3219 * Port over the new SIMIX_network submodule (internal refactoring)
3220 * Basic support to log events as with SMPE (use --cfg=SMPE:1)
3221 * Implement more missing elements of the standard:
3223 - MPI_MAXLOC MPI_MINLOC + all associated datatype MPI_DOUBLE_INT,
3225 - MPI_Address() MPI_Get_count() MPI_Type_free() MPI_Type_extent()
3226 MPI_Scan() MPI_Get_processor_name()
3227 - Added implementation of missing case for Alltoall (warning: it's
3228 *not* the bruck variant from OpenMPI; based on Alltoallv instead)
3229 - SMPI_MPI_Gather() SMPI_MPI_Gatherv() SMPI_MPI_Scatterv()
3230 SMPI_MPI_Reduce_scatter() SMPI_MPI_Allgather()
3231 SMPI_MPI_Allgatherv()
3232 * Bug fixes include:
3233 - MPI_Waitsome() was broken
3234 - Allow relative includes in smpicc
3235 - Command line cfg argument 'reference_speed' was ignored...
3236 - Some functions did not properly lead to auto-benching of user code
3237 - smpicc passes -O2 by default (just like openmpi one)
3239 * add SIMIX_action_suspend() and SIMIX_action_resume() functions
3240 * Bug fixes about timeouts during communications
3241 * add SIMIX_message_sizes_output() as a pimple to write to file the
3242 amount of messages per size. Use gnuplot to get histogram.
3243 Pimple because that's the only user-visible function of simix,
3244 defined directly in xbt.h (irk, sorry)
3246 - Add a SIMIX_sem_get_capacity() function
3247 - Fix interactions with processe resume/suspende
3248 - release_forever() was stupidly broken
3249 - Fix SIMIX_display_process_status() for processes in a semaphore
3250 - Make SIMIX_sem_block_onto() user-visible
3251 * Refactoring context stuff:
3252 - Use pseudo-OOP for better modularity
3253 - reimplement SIMIX_process_kill() without process_schedule() so
3254 that the latter can take as invariant that it is called from
3256 - Merge context_start into context_new for sake of simplicity
3258 * Add a Vivaldi network model, coded live during SUD'10 ;)
3259 * Rename configuration variables to start a hierarchy:
3260 o cpu_model -> cpu/model
3261 o network_model -> network/model
3262 o workstation_model -> workstation/model
3263 * New configuration variables:
3264 o network/bandwidth_factor: correction to bandwidth
3265 o network/latency_factor: correction to latency
3266 o netwotk/weight_S: correction to the weight of competing streams
3267 * Add a long description to the models, that users can see with such
3268 argument on the command line: --cfg=cpu/model:help
3269 * --help-models display the long description of all known models
3271 * config: add the ability to set a default value after registration
3272 Does not override any previously set value (e.g. from cmd line)
3273 * dict: allow to have integer key and data.
3274 When so, you need to use the following functions
3275 void xbt_dicti_set(xbt_dict_t dict, uintptr_t key, uintptr_t data);
3276 uintptr_t xbt_dicti_get(xbt_dict_t dict, uintptr_t key);
3277 void xbt_dicti_remove(xbt_dict_t dict, uintptr_t key);
3278 In contrary to regular dicts, the key is not malloced before copy.
3279 Mixing scalar and regular elements in the same dict is not tested
3281 * Allow to use xbt_dynar_shrink() to expend the dynar instead
3282 Tracing for Visualization:
3283 * SimGrid is now instrumented in order to generate a trace file for
3284 visualization analysis: to use it, need to compile SimGrid with the
3285 "tracing" option enabled, and instrument the program using SimGrid with
3286 TRACE_start, TRACE_category, TRACE_msg_set_task_category and TRACE_end
3287 (among other functions).
3288 * The instrumentation only traces the platform utilization for now
3289 * Documentation to use the tracing functions and how to analyze the
3290 traces with the Triva tool is written.
3291 * More information about: SimGrid FAQ (in the section Tracing Simulations
3294 * We moved to cmake as default build system. Autotools support will
3295 be dropped soon. Check the FAQ for more info about how to use it.
3296 * Greatly improved our cdash/ctest interactions
3297 Check http://cdash.inria.fr/CDash/index.php?project=Simgrid
3298 * Added memory checking tests with valgrind; lot of memleak fixing.
3299 This may be the first release of simgrid with so few memory issues
3300 * Added code coverage tests.
3301 Our coverage is still improvable, but at least we see it on cdash.
3303 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Wed, 28 Apr 2010 28 17:11:16 +0100
3305 SimGrid (3.3.4) stable; urgency=low
3307 The "Desktop Grid needs love too" release (also called Xmas release).
3309 Models improvements:
3310 * Major speedup in the maxmin system solving by using lazy evaluation
3311 Instead of solving completely the maxmin system at each iteration,
3312 only invalidate (and recompute) the modified parts.
3313 This new feature is enabled in default models but you can try to
3314 turn it on with "--cfg:maxmin-selective-update=1" for other models.
3315 * Cas01 IMproved as default CPU model
3316 This CPU model is the same Cas01 model, but it uses the
3317 maxmin-selective-update flag and a heap structure to manage
3318 actions on SURF kernel.
3319 It reduces the complexity to find the next action to finish and,
3320 consequently, it's faster than the old Cas01.
3321 This is the new default CPU model (Cas01).
3322 * Rename the old Cas01 model to Cas01_fullupdate
3323 Keep the old cpu model Cas01 with the new name of Cas01_fullupdate.
3324 Use "--cfg=cpu_model:Cas01_fullupdate" to use the old default CPU model.
3325 * CpuTI (CPU Trace Integration)
3326 A new CPU model whose objective is simulate faster when using
3327 availability trace files.
3328 Instead of using a full featured, over engineered maxmin system for
3329 CPU modeling, this model does the pre-integration of traces files
3330 to calculate the amount of CPU power available, and so, executes
3331 faster than the old CPU models.
3332 Use "--cfg=cpu_model:CpuTI" to change to this CPU model.
3333 * Use LV08 as default network model since it gives better accuracy
3334 for small messages and shouldn't change things for big ones.
3335 Use --cfg=network_model:CM02 to get the previous behavior.
3338 ******************************************
3339 *DO NOT MIX 3.3.4 RESULTS WITH OLDER ONES*
3340 ******************************************
3341 * The new CPU model may changes simulations!
3342 The point is that events occurring at the exact same timestamp
3343 are not scheduled in the same order with the old and new
3344 version. This may be enough to completely change the execution
3345 of simulations in some cases.
3346 * The new network model will change simulations!
3347 This new model is more realistic than the previous one, so you
3348 should consider redoing your old experiments with this model.
3349 Sorry for the inconvenience.
3352 * Introduce the supernovae compilation mode
3353 When compiled that way, the whole SimGrid (or almost) is put in a
3354 single compilation unit and compiled in one shoot.
3355 This is to help gcc which has difficulties to inline stuff from one
3357 The speedup seem to be above 15%, althrough more tests are needed on
3358 amd64 to confirm that gain.
3361 * Port of MSG's mailbox on top of SIMIX network
3362 The put/get mechanism was greatly simplified on the way.
3365 * New SIMIX network module. Provides:
3366 - Mailbox: rendez-vous mechanism to find with who you want to speak
3367 - Synchronous send/recv: easier and hopefully faster since the
3368 logic is handled in the maestro process directly now
3369 - Asynchronous send/recv: you dreamt of it? It's here now
3370 Too bad that nobody cared enough to propagate the change to MSG.
3371 * Add semaphores as SIMIX synchronization mechanism.
3374 * new function SD_daxload(char*) to load a DAX file
3375 (see http://vtcpc.isi.edu/pegasus/index.php/WorkflowGenerator)
3376 * Introduce typed tasks. Specify its kind and cost at creation.
3377 At scheduling, just give where it should be placed, and the cost
3378 for each involved resource is automatically computed.
3379 Existing constructors so far (more to come of course):
3380 - SD_task_create_comm_e2e() for end-to-end communication
3381 - SD_task_create_comp_seq() for sequential computation
3382 Use SD_task_schedulev() / SD_task_schedulel() to schedule them.
3383 * new function SD_task_dump() for debugging display
3384 * new function SD_task_dotty(task,FILE*) writing to file the info
3385 about the task in dotty format
3386 * SD_task_dependency_exists() can now cope with having one of its
3387 arguments NULL. If so, it tests whether the other argument has any
3389 * Add getters on list of preceding/following tasks:
3390 SD_task_get_parents(task) and SD_task_get_children(task)
3391 * Add getters on amount of workstations and list:
3392 SD_task_get_workstation_count(t) and SD_task_get_workstation_list(t)
3393 * Add getter on task kind: SD_task_get_kind(task)
3394 * Update the start_time and finish_time of tasks on completion/failure
3395 * Bugfix: Remove task from state swags when destroyed
3398 * New function: void gras_cpu_burn(double flops) -- a simple CPU burner
3401 * New function: xbt_dynar_dopar(dynar,fun) to map a function over the
3402 dynar with one separate thread per value of the dynar.
3403 * Change the prototype of xbt_thread_create(), sorry.
3404 Added a boolean parameter indicating whether we want to join this
3405 thread (used in SG only for now)
3406 * Implement xbt_thread_join and xbt_thread_yield in SG also.
3409 * GTNetS wrappers should now be usable again (and betterly tested too)
3410 * Fix a major regression from 3.2 where the timeout provided to
3411 MSG_task_put_with_timeout() was used as absolute time before which
3412 the comm should be done.
3413 * Start to fix the <cluster> tag.
3414 - Internal links should be good now (beside of the loopback, which
3415 use the private link instead)
3416 - paths to the external world is still rather broken
3417 - the <route:multi> tag is just broken. Actually that's brain-dead.
3418 We need sth like <route:multi src="myCluster" dst="$*-${myCluster}">
3419 to make it less stupid
3420 ** Check your platform with teshsuite/simdag/platforms/flatifier **
3421 * Fix a source-level compatibility glitch from 3.2: after defining
3422 MSG_USE_DEPRECATED, you can use the old name
3423 MSG_task_put_with_time_out() for MSG_task_put_with_timeout()
3424 * Allow to compile from the SVN with automake 1.11
3425 * Fix some problems when using the "start_time" tag in deployment XMLs.
3426 * Fix #8569: XBT/synchro.h has redundant declarations
3427 * Fix #8563: MSG return values and exceptions
3428 Introduce a MSG_TIMEOUT_FAILURE return code and use it consistently.
3429 * Integrate patch #8636: Obey DESTDIR when installing documentation.
3430 Thanks to Robson Peixoto.
3431 * Fix a vicious bug in dictionaries inducing that some elements were
3432 not freed on xbt_dict_free()
3434 Portability report of this version:
3435 * Main portability targets:
3436 - linux (ubuntu (804/810/910) /debian (4/5/testing) /fedora (core11))
3437 on (amd64/i386/ia64)
3438 - mac leopard on i386
3439 Known problems: http://cdash.inria.fr/CDash/index.php?project=Simgrid
3440 but nothing critical.
3441 * Other platforms: windows, AIX and others were not tested for this release
3443 Timing report of this version:
3444 * Lazy evaluation brings arbitrary speedup (ie, speedup depending on
3445 scenario parameters). From 8h to a few seconds in desktop grid settings.
3446 * Supernovae brings about 25% speedup on i386.
3448 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 24 Dec 2009 19:07:39 +0100
3450 SimGrid (3.3.3) stable; urgency=low
3452 The "Need for Speed" release.
3454 The timings done to validate the 3.3.2 were faulty.
3455 Instead of being 5% faster, it was 15% slower (compared to 3.3.1).
3457 The problem was a conversion from a manually handled vector to
3458 xbt_dynar_t on the critical path.
3459 xbt_dynar_foreach calls functions, inducing stack management crap.
3461 We inlined these functions and xbt_dynar_foreach is now breath taking.
3462 We also inlined xbt_swag_belong on the way.
3464 Here are some approximate speedup measurements (on master/slaves
3465 simulations lasting between 10s and 20s each):
3466 3.3.1 -> 3.3.2: about same performance
3467 3.3.2 -> 3.3.3: 40% speedup
3468 3.3.1 -> 3.3.3: 40% speedup
3469 3.3.1 with inline patch -> 3.3.3: 30% speedup
3471 Our reading is that the refactoring which occurred in 3.3.2 made us
3472 suffer much more from the xbt_dynar_foreach low performance, but
3473 once we solved this, this refactoring proved to be very performance
3474 effective. From the 40% speedup, somehow, 10% are due to the
3475 inlining and 30% to the refactoring.
3477 That's a pitty that gcc cannot inline functions placed in other files
3478 alone. We have to choose between:
3479 - break the encapsulation (by putting private data structures and
3480 accessors in headers files to help gcc)
3481 - live with low performance
3482 - switch to a decent compiler such as icc (not quite possible).
3484 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 20 Aug 2009 21:21:33 +0200
3486 SimGrid (3.3.2) stable; urgency=low
3488 The "Simplicity does not preceed complexity, but follows it" release.
3490 The main contributors of this release were (lexical order):
3491 Silas De Munck, Stéphane Genaud, Martin Quinson, Cristian Rosa.
3494 * Extract the routing logic into its own object.
3495 (was dupplicated in network.c and workstation_LV07.c;
3496 Allows to implement other ways of storing that info)
3497 => kill now useless network_card concept
3498 - Use dynar to represent routes (instead of void** + int*)
3499 - kill link_set (use surf_network_model->resource_set instead)
3500 - Add a command-line option to choose the routing schema to use
3501 - Add three new models:
3502 * Floyd (shortest path computed at initialization)
3503 * Dijikstra (shortest path recomputed all the time)
3504 * Cached Dijikstra (shortest path computed on need)
3505 All these models where contributed by Silas De Munck, and are
3506 described in his ICCS09 paper.
3508 * Simplify model declaration
3509 (less redirections, less function to write when defining a model)
3510 - Factorize stuff between models:
3513 surf_model_resource_set(model)
3514 surf_model_resource_by_name(model, name)
3515 - Unify the types of models in s_surf_model_t (using an union)
3516 - Embeed fields of common_public directly into s_surf_model_t
3517 - Rename model methods:
3518 action_free ~> action_unref
3519 action_change_state ~> action_state_set
3520 action_get_state ~> action_state_get
3521 - Change model methods into functions:
3522 (model)->common_public->action_use ~> surf_action_ref
3524 * Implement a generic resource; use it as ancestor to specific ones
3525 (allows to kill duplicated code in models)
3526 Drawback: timer command don't need no name nor properties;
3527 workstation_CLM03 don't need no properties
3528 (but I guess we can live with those few bytes wasted)
3530 * Improve the action object model
3531 - implement a constructor avoiding dupplicated code about field
3532 initialization in generic_action part.
3534 * Kill the SDP model: it has an external dependency, is deprecated
3535 in flavor of modern lmm models, and didn't compile since a while
3538 * Relocation of the context module from XBT to SIMIX.
3539 (the context were decoupled from the simix processes, duplicating a lot of code)
3540 => a lot of code was factorized
3541 - less overhead is introduced during scheduling
3542 - simpler API for the context factory
3543 - the logic for process creation,destruction and manipulation was simplified
3544 * Simplification of the s_smx_process_t data structure.
3545 => accesing the simix level data associated to a process is faster now,
3546 and the code is a lot more readable.
3549 * Implement some more MPI primitives:
3550 MPI_Bcast, MPI_Waitany, MPI_Waitall, MPI_Reduce, MPI_Allreduce, MPI_Scatter, MPI_Sendrecv, MPI_Alltoall
3551 -implementation: Bcast: flat or 2-ary tree (default),
3552 Barrier: 4-ary tree,
3554 Allreduce: Reduce then Bcast
3555 Alltoall: "basic_linear" if data per proc < 3Kb, "otherwise pairwise".
3556 Not yet implemented: "Bruck" for data per proc < 200b and comm size > 12
3557 Alltoallv: flat tree, like ompi
3559 * Add support for optimized collectives (Bcast is now binomial by default)
3560 * Port smpirun and smpicc to OS X
3563 * Kill SD_link_get_properties: hard to maintain and makes very little sense
3564 Shout out if you used it.
3567 * Display the list of still queued messages in SG mode when existing
3571 * Add xbt_set_get_by_name_or_null() [Silas De Munck]
3572 * Add xbt_graph_node_get_outedges() [Silas De Munck]
3573 * Add xbt_str_from_file(FILE*)
3574 * Add xbt_dict_get_key achieving a linear reverse search
3575 * Remove the context module
3577 Portability report of this version:
3578 * Main portability targets:
3579 - Linux(debian)/x86/context
3580 - Linux(debian)/x86/pthreads
3581 - Linux(debian)/amd64/context
3582 - Linux(debian)/amd64/pthreads
3583 On these, we still have the eratic breakages of gras/pmm and
3584 amok/saturate_sg reported in previous version. We still think
3585 that the tests are the cause of the fault, not the tested code.
3587 - Mac OSX Leopard/x86/context
3588 Still false negative in tesh autotesting.
3589 Smpi still fails, but this time because readlink does not accept -f
3590 Everything seems to work properly beside of that.
3593 - AIX version 5.3 (only tested contexts this time)
3594 Smpi still fails there because mktemp is not installed.
3595 Everything seems to work properly beside of that.
3597 I managed to compile it for the first time, but several breakages.
3598 Won't delay the release for this exotic platform.
3600 * Windows: it's still lagging behind. If you want to help, please
3603 Timing report of this version:
3604 This version seem to be more than 5% faster than 3.3.1 (on linux
3605 64bits with contextes). The gain is less than expected, we are
3606 investigating this for next release.
3608 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Wed, 19 Aug 2009 17:07:12 +0200
3610 SimGrid (3.3.1) stable; urgency=low
3613 * Implement a --cfg-help to show existing configuration variables
3614 * Build chain do not require doxygen in maintainer mode
3617 * fix a bug on struct sizeof computation, which prevented the
3618 exchange of arrays of structs in some conditions
3619 - added a regression test about this in datadesc_usage
3620 * Allow the exchange of 0-long dynamic vectors.
3621 - for that, use -1 as indicator of dynamic size instead of 0
3622 - This implied to change any size from unsigned long to long,
3623 reducing a bit communication abilities, but I guess that with
3624 64bits being quite common, this is more than enough.
3625 - This also induce a protocol change, thus bumping network protocol
3626 version from 0 to 1 (if we have external users, we have to get
3627 clean on that point too ;)
3628 - added two regression tests about this in datadesc_usage
3629 * Be more verbose when propagating local exceptions
3630 This helps debugging.
3631 * Display the status of simulated processes when receiving SIGINT in
3635 * Allow to control the simulation from a trace file.
3636 New functions MSG_action_register() and MSG_action_trace_run()
3637 The first one allows to associate a function execution to each
3638 kind of action while the second one parses a trace file and
3639 triggers the corresponding actions within the system.
3640 For now, only a toy example is provided in examples/msg/actions
3641 * Add an example of process migration in examples/msg/migration
3642 * Fix a bug in task exchange which broke MSG_task_get_sender()
3643 Add a teshsuite regression test for that.
3644 [Bug: if MSG_task_get_sender() is called after sender exit,
3646 * Fix a bug which prevented suspend/resume to work properly
3647 * Display the status of simulated processes when receiving SIGINT
3648 This fixes a regression of v3.3. due to the introduction of SIMIX
3649 * Bug fixing in failure management:
3650 - trace could not start by a failure at time 0
3651 - failure during communications were not working
3654 * Add SIMIX_process_set_name() to change the name of the current
3655 process in the log messages.
3656 * Store smx_hosts in a dict since we only retrieve them by name
3657 * Move the configuration infrastructure to surf
3660 * Move the configuration infrastructure to surf
3663 * Massive internal cleanups:
3664 - Store internal structures on processes instead of hosts (allows
3665 to have more than one process per host, in addition of being more
3667 - Cleanup the initialization/finalization process
3668 - Kill a whole bunch of unneeded synchronization:
3669 processes run in exclusive manner within the simulator
3670 - Move queues from global tables to process data fields
3672 - now accept -platform and -hostfile arguments
3673 - Pass the right rank value to processes according to the hostfile
3674 * Compile the examples by default, and use them as regression tests
3675 * Implement MPI_Wtime()
3676 * Change the reference speed to a command line option
3679 * TCP_gamma can now be specified as command line option using
3680 --cfg=TCP_gamma:10000000.0
3681 * Change the --surf-path cmd line option into --cfg=path:
3684 * Also include strbuff from xbt.h public header
3685 * xbt_ex_display(): do not free the exception after displaying
3686 This allows to do more with the given exception afterward.
3687 Users should call xbt_ex_free() themselves.
3691 Portability report of this version:
3692 * Main portability targets:
3693 - Linux(debian)/x86/context
3694 - Linux(debian)/x86/pthreads
3695 - Linux(debian)/amd64/context
3696 - Linux(debian)/amd64/pthreads
3697 These targets fail about 1/10 of times on gras/pmm, but we believe
3698 that this is because of the test, not because of simgrid.
3699 amok/saturate_sg fails even more rarely, and the test may not be
3702 - Mac OSX Leopard/x86/context
3703 The test suite still spits tons of errors because some obscure
3704 force prevents us from removing the temporary directories
3705 arguing that they still contain some metadata I've never heard of.
3706 Smpi fails because seq is not installed.
3707 Everything seems to work properly beside of that.
3710 - AIX version 5.3 (both contexts and pthread)
3711 Smpi still fails there because mktemp is not installed.
3712 XML inclusions seems rosty on AIX.
3714 * Windows: it's still lagging behind. If you want to help, please
3717 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Sat, 27 Jun 2009 00:14:30 +0200
3719 SimGrid (3.3) stable; urgency=high
3723 * JAVA BINDINGS for MSG (you dreamt of them? We made them)
3724 [Malek Cherier & Mt]
3726 * Introduce the SIMIX module: factorize code between MSG and GRAS.
3729 Until now, GRAS were using MSG as an interface to SURF. It was
3730 quite difficult because both interface have several differences
3731 (MSG channels vs GRAS sockets were the most notable point).
3733 This also opens the gate to SMPI (which should occur soon) and speed
3734 up simulations by to 40% (even if it were not the main goal).
3736 **************************************
3737 *DO NOT MIX 3.2 RESULTS WITH 3.3 ONES* Simix may changes simulations!
3738 **************************************
3739 The point is that events occurring at the exact same timestamp are
3740 not scheduled in the same order with the old and new version. This
3741 may be enough to completely change the execution of simulations in
3742 some cases. Sorry for the inconvenience.
3744 * Cleanup and upgrade the XML format to push further scalability
3745 issues (check http://hal.inria.fr/inria-00256883/ for more info)
3747 * Improve the testing infrastructure with tesh. Now a very large part of
3748 the code is tested not only by being run but also by checking that the
3749 output match an expected output [Mt].
3751 * Move on to FleXML v1.7 for the embeeded XML parsers. This version
3752 is really less memory-demanding, which should allow you to use
3753 larger files in SimGrid [AL].
3755 * Inform valgrind about our contextes, so that it becomes usable
3756 with the default (and more effecient) version of SimGrid
3757 [contributed by Sékou Diakite, many thanks]
3760 * Introduce a listener thread in charge of receiving incoming
3761 messages from the network. It allows to overlap communication and
3762 computation but most notably, it removes some stupid deadlocks due
3763 to the fact that so far, a process could not send and receive at
3764 the same time. This made most non trivial communication schema
3766 * Convert the PIDs from long int to int to match the MSG ones (and
3767 linux ones too) [Mt]
3768 * New function: gras_agent_spawn() to launch a new process on
3769 current host. Only working in simulation for now. [Mt]
3770 * New function: gras_os_hostport() returning a constant form (ie,
3771 not needing to be freed) of "gras_os_hostname():gras_os_myport()"
3774 * Make the backtrace of exceptions more human readable [Mt]
3775 * New module: xbt/str [Mt]
3776 a ton of string utility functions (split, join, printf to a newly
3777 allocated buffer, trim, etc)
3778 * New module: xbt/hash [Mt]
3779 SHA1 hashing algorithm (more to come if needed)
3780 * New module: xbt/synchro [Mt]
3781 synchronization tools (mutex and conditions) working the same way
3782 in simulation and in real life (mainly useful for GRAS, but not
3784 * New module: xbt/queue [Mt]
3785 classical producer/consumer synchronization scheme
3786 * xbt_dynar_new_sync() creates a synchronized dynar. All access
3787 (using the classical functions will get serialized) [Mt]
3788 * Make dictionary internal table dynamic. No need to specify its size
3789 anymore; functions xbt_dict_new_ext() and xbt_dict_hashsize_set()
3791 * Make sure the log channels are organized as a tree under windows
3792 (because of ANSI C compatibility issue, any channel were child of
3793 root directly) [Mt].
3796 * Cleaned many thing in surf and fixed a few bugs [AL].
3797 * Add a nice command line configuration mechanism to compose models [AL].
3798 * Add a new model for parallel tasks (ptask_L07) that is less buggy than
3799 the previous one (KCCFLN05). It relies on something that looks like
3800 a max-min sharing mechanism but cannot be written as such. A new solver
3801 was thus designed [AL].
3802 * Add a new solver to lmm. Based on Lagrange optimization and
3803 gradient-based descent, it enables to efficiently maximise systems s.a
3805 sum f_i(x_i) s.t Ax<= b with A_{i,j}>=0 and f_i a concave function.
3807 This solver enables to propose two new network models for TCP Reno and
3808 TCP Vegas based on Low's work. These models still need to be fully
3809 tested though [Pedro Velho].
3812 * Bug fix in SD_simulate. Now the time bound given as argument is
3814 * Use the new parallel task model (ptask_L07) as default.
3815 * Use the SURF command line configuration mechanism.
3816 * 0-size tasks (for synchronization) should now work.
3818 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Sun Apr 12 05:20:36 CEST 2009
3820 SimGrid (3.2) stable; urgency=high
3824 We still experience issues on this platform, but we believe that at
3825 least MSG is usable.
3827 GRAS API BREAKAGE (for simplification purpose, sorry):
3828 * the gras_msgtype_by_name is not used anymore. Instead of
3829 gras_msg_send(toserver, gras_msgtype_by_name("request"), &request);
3830 you can write (and must)
3831 gras_msg_send(toserver, "request", &request);
3832 - If you still want to pass a gras_msgtype_t to the function (to cache
3833 the type and avoid the lookup time), use the gras_msg_send_() variant.
3834 - Impacted functions:
3835 gras_cb_register, gras_cb_unregister, gras_msg_send, gras_msg_wait,
3836 gras_msg_rpccall, gras_msg_rpc_async_call, gras_msg_wait_ext
3837 * The callbacks are now expected to return 0 when everything went well
3838 (just like the main() function)
3840 GRAS new features and improvements:
3841 * New module mechanism where user code can use per process globals [Mt]
3842 This is similar to gras_userdata_*() functions, but for libraries. It
3843 factorize some code developped over and over in the examples and AMOK.
3844 It has still to be documented and used (only amok/peermanagement is
3846 * Fix a vicious bug in the TCP buffering mechanism which leaded to message
3847 loss when they were small enough to fit into the buffer and sent quickly
3848 enough so that they can all get received in one shoot.
3849 * gras_datadesc_by_name and gras_msgtype_by_name: now raise an exception
3850 if not found. Use the *_or_null() variant for the old semantic.
3851 * In gras_msg_handle, do not discard messages without callback.
3852 They are probably messages to be explicitly awaited later (ie, proofs of
3853 mis-synchronization in userland since they are sent before being awaited)
3854 No big deal usually.
3855 * gras_socket_meas_send/recv: semantic changed!
3856 The numerical arguments used to be (1) the total amount of data to send
3857 and (2) msg_size. This was changed to (1) msg_size and (2) amount of
3858 messages. This was need for the fool willing to send more than MAXINT
3859 bytes on quite fat pipes.
3862 * Do really rename the hostmanagement module to peermanagement. [Mt]
3863 Ie, rename functions from amok_hm_* to amok_pm_*. This breaks the API,
3864 but this is rather new and this was documented in the module
3865 documentation (poor excuses, I admit)
3866 * Bandwidth measurement semantic changed! This follows the changes to
3867 gras_socket_meas_send/recv explained above.
3870 * A sequential mode has been added to the workstations. When a workstation
3871 is in sequential mode, it can execute only one task, and the other tasks
3872 are waiting in a FIFO. [Christophe Thiery]
3875 * The KCCFLN05 workstation model now handles parallel tasks. It is the
3876 model for SIMDAG. [Christophe Thiery]
3877 * Bug fix in the maxmin solver: Some values were close to 0 instead of
3878 equal to 0, which caused some bad behaviors in
3879 saturated_constraint_set_update. I now use a threshold mechanism like in
3883 * When running manually src/testall, you select specific units [Mt]
3884 testall is the result of our cunit mechanism, and should replace all
3885 the scripty thingy around since bash don't run easily on billware.
3887 * A mallocator system has been added. [Christophe Thiery]
3888 Mallocators allow you to recycle your unused objects instead of freeing them
3889 and allocating new ones.
3891 Documentation update:
3892 * FAQ reworking + New FAQs:
3893 - "Valgrind spits tons of errors!" [Mt]
3894 - "How to repport bugs" [Mt]
3895 - "Cross-compiling a Windows DLL of SimGrid from Linux" [Mt]
3896 - "What is the difference between MSG, SimDag, and GRAS?" [Mt]
3897 - Communication time measurement within MSG [AL]
3898 - I experience weird communication times when I change the latency [AL]
3899 * GRAS tutorial [Mt]
3901 - an introduction to the framework and to the used communication model
3902 - an initiatic tour introducing the most proheminent features:
3904 . Lesson 0: Installing GRAS
3905 . Lesson 1: Setting up your own project
3906 o Part 2: Message passing
3907 . Lesson 2: Exchanging simple messages
3908 . Lesson 3: Passing arguments to the processes (in SG)
3909 . Lesson 4: Attaching callbacks to messages
3910 . Lesson 5: Using globals in processes
3911 . Lesson 6: Logging information properly
3912 . Lesson 7: Using internal timers
3913 . Lesson 8: Handling errors through exceptions
3914 . Lesson 9: Exchanging simple data
3915 . Lesson 10: Remote Procedure Calling (RPC)
3916 . Lesson 11: Explicitly waiting for messages
3917 . Recapping of message passing features in GRAS
3918 - A HOWTO section containing:
3919 o HOWTO design a GRAS application
3920 More are due, of course. They will come latter. In the meanwhile, you can
3921 check the examples which are still here.
3923 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri Mar 16 21:11:46 CET 2007
3925 SimGrid (3.1) stable; urgency=high
3929 There was a stack corruption somewhere, visible only when optimizing
3930 with these versions. [Vince]
3933 * This is a NEW module! SimDAG (SD for short) is a revival of the old SG
3934 module that enabled to play with Directed Acyclic Graphs. It is built
3935 directly on top of SURF and provides an API rather close to the old
3936 SG. Some old codes using SG are currently under rewrite to check that
3937 all needful functions are provided. [Christophe Thiery]
3940 * Complete rewrite of the KCCFLN05 workstation model. It is now an
3941 extension of the classical CLM03 model that gracefully handles
3942 failures. This is now the default model for MSG and GRAS. It doesn't
3943 handle parallel tasks yet though. [AL]
3944 * Bug fix: Weights were not correctly set in the network part.
3945 WARNING: This may have resulted in incorrect results with simulations
3946 where there are more than one flow on a given link. [AL]
3949 * After a (long ?) discussion on simgrid-devel, we have decided that the
3950 convention we had on units was stupid. That is why it has been decided
3951 to move from (MBits, MFlops, seconds) to (Bits, Flops, seconds).
3952 WARNING: This means that all previous platform files will not work as
3953 such with this version! A warning is issued to ask users to update
3955 A conversion script can be found in the contrib module of the CVS, under
3956 the name contrib/platform_generation/surfxml_update.pl [MQ]
3959 * Bug fix: Processes were started in reverse order, wrt deployment file.
3960 WARNING: if your code relies on this bug, please fix it. [AL]
3961 * Bug fix: Add a test in MSG_task_execute to stop whenever a task is
3962 being executed on two different locations. [AL]
3963 * Bug fix: Failures are now better supported thanks to Derrick's tests
3964 (there was many failure situations I hadn't thought of and that weren't
3965 correctly handled). [AL]
3966 * New function: MSG_host_is_avail indicates you whether a given m_host_t
3970 * New! a real RPC mechanism, as it ought to be since too long. [MQ]
3971 Exception occurring on server-side are propagated back to client (!).
3973 API CHANGE: the callback changed their prototype. Change:
3974 int my_handler(gras_socket_t expeditor, void *payload_data) {
3976 int my_handler(gras_msg_cb_ctx_t ctx , void *payload_data) {
3977 gras_socket_t expeditor=gras_msg_cb_ctx_from(ctx);
3979 * New! function: gras_msg_handleall to deal with all messages arriving
3980 within a given period.
3981 * New! function: gras_socket_server_range to get a server socket in a
3982 range of port numbers (ease to avoid port number conflicts) [MQ]
3983 * New! gras processes display their backtrace when they get a SIGUSR1
3984 or when Ctrl-C is pressed. Use Ctrl-C Ctrl-C to exit.
3985 Sweet to debug RL processes [MQ]
3989 - Do not force experiment sizes to be expressed in kb, or it becomes
3990 impossible to measure the latency this way (needs one byte-long tests)
3991 WARNING: this changes the amok_bw_* function semantic. [MQ]
3992 - Implements the link saturation stuff. [MQ]
3993 * Peer management module:
3994 New! module factorizing code that we wrote over and over [MQ].
3997 * New module: cunit (my jUnit implementation in ansi C) [MQ]
3998 - Test units are placed directly into the library code, they get extracted
3999 automatically and placed into the src/testall binary.
4000 - Convert most of the XBT tests to this system.
4001 * New functions: xbt_dynar_getfirst_as() and xbt_dynar_getlast_as() [MQ]
4002 * XML parsing: rewrote parts of flexml to enable multiple xml parsers to
4003 live in the same C code. This required to change a little bit the API
4004 of surfxml parsing but shouldn't be an issue for end-users. [AL]
4005 * New module: sparse graph structure with basic algorithms (this is work
4006 in progress and the API is not considered to be frozen yet). [AL]
4007 * Display more information on backtraces: source line & function names are
4008 now displayed just like valgrind does (rely on addr2line tool) [MQ]
4009 * New function: xbt_backtrace_display(). Sweet while debugging [MQ]
4010 * Reworked a little bit some #include statements to load only required
4011 headers. Some user code that relied on SimGrid to include stdlib or
4012 stdio may need to include it by themselves. [AL]
4013 * Fixed xbt/log.h. A missing SG_BEGIN_DECL prevented compilation with
4015 * Renamed xbt_host_t into xbt_peer_t since it betterly describes what I
4016 meant. This breaks the API of AMOK and of xbt/config. Sorry about this,
4017 but I guess that almost nobody used those parts. [MQ]
4019 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 14 Jul 2006 01:32:27 +0200
4021 SimGrid (3.0.1) stable; urgency=low
4024 * Unfortunately, I had missed 5 misnamed functions:
4025 xbt_fifo_item_t xbt_fifo_newitem(void);
4026 void xbt_fifo_freeitem(xbt_fifo_item_t);
4027 xbt_fifo_item_t xbt_fifo_getFirstItem(xbt_fifo_t l);
4028 xbt_fifo_item_t xbt_fifo_getNextItem(xbt_fifo_item_t i);
4029 xbt_fifo_item_t xbt_fifo_getPrevItem(xbt_fifo_item_t i);
4030 They're now deprecated. Please use their new versions:
4031 xbt_fifo_item_t xbt_fifo_new_item(void);
4032 void xbt_fifo_free_item(xbt_fifo_item_t);
4033 xbt_fifo_item_t xbt_fifo_get_first_item(xbt_fifo_t l);
4034 xbt_fifo_item_t xbt_fifo_get_next_item(xbt_fifo_item_t i);
4035 xbt_fifo_item_t xbt_fifo_get_prev_item(xbt_fifo_item_t i);
4037 * Bugfix: really disconnect fifo items which are remove_item()ed [AL]
4038 * Documentation: xbt_log module unmercifully reworked [MQ]
4039 * Bugfix: there was a problem with the ending of contexts with
4040 the pthread backend. It caused some weird deadlock or behavior
4041 depending on the pthread implementation. [AL]
4042 * Bugfix: get the exceptions raised in the simulator repport where
4043 and why they come from when they are not caught in time [AL, MQ]
4046 * Bugfix: Do repport the error when two non-connected hosts try to
4047 exchange data (Thanks to Flavien for stumbling into this one) [AL]
4050 * Add additionnal checkings on communications. Assert that two
4051 communicating hosts are connected by a set of links... [AL]
4054 * Add additionnal checkings on channel values in communication [AL]
4055 * New: MSG_task_get_source to see on which host a task was generated [HC]
4056 * New: int MSG_task_probe_from_host(int channel, m_host_t host): returns
4057 the number of tasks waiting to be received on channel and sent
4059 * New: MSG_error_t MSG_task_get_from_host(m_task_t * task, int channel, m_host_t host);
4060 waits for the first task coming from a given host.. [AL]
4062 GRAS new functionnalities: [MQ]
4063 * Enhance the parsing macro to allow the size of multidimentional objects
4064 to be given thru annotations.
4065 * New example (and documentation): Matrix Multiplication a la RPC
4066 (as when I was young!) and fix a bunch of bugs found on the way.
4068 GRAS performance improvements: [MQ]
4070 * Reduce the amount of cbps creation/destruction by making it static to
4071 datadesc_send/recv() and using a (newly created) cbps_reset (based on
4074 * Change libdata to a set so that we can search for stuff by ID (and thus
4075 reduce the insane amount of dict lookups)
4078 * Actually implement gras_datadesc_copy() so that we don't have to mimick
4079 RL communication on top of SG since it's so uneffective.
4080 It may also be used for inter-thread communication in RL, one day.
4081 * Use gras_datadesc_copy() to exchange messages on top of SG
4083 - improve message exchange performance on top of SG
4084 - deprecate transport_plugin_sg.c:gras_trp_sg_chunk_send() & recv()
4085 * Don't exchange on the network the size of the used part of buffer,
4086 instead, specify the possible buffer size to read().
4088 - reduces the amount of read/write calls (one pair per exchange)
4089 - reduces the amount of exchanged data (the size)
4090 - allows to retrieve all arrived data on receiver side, if we don't need
4091 it right now (subsequent read will peek the buffer)
4092 - allows the receiver to proceed with the beginning of the stream before
4093 everything is arrived
4094 - make it possible to build an iov transport (using readv/writev)
4096 - take care of the data with non-stable storage (like stacked data),
4098 * If possible, TCP send uses vector I/O (when writev() is here)
4099 - Don't use it for receive since we send data sizes and data on the
4100 same stream, so we wouldn't be able to chain large amount of chunks
4101 before having to flush the stuff to read the size.
4102 * Rework the transport plugin mechanism to simplify it and reduce the
4103 amount of pointer dereferencement when searching for the right function
4106 * I guess that now, we do almost as few system calls as possible while
4107 doing as few data copy as possible.
4109 To improve it further, we could try to send all the sizes first and then
4110 all the data (to use iov on receiving size), but it's only a partial
4111 solution: when you have 2 dimensional data, the sizes of the second
4112 dimension is data of the first dimension, so you need 3 streams.
4114 I'm not sure the potential performance gains justify the coding burden.
4116 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 21 Oct 2005 14:42:20 +0200
4118 SimGrid (3.00) stable; urgency=high
4121 * New! Give the possibility to hijack the surf parser and thus bypass
4122 MSG_create_environment and MSG_launch_application. Have a look at
4123 examples/msg/msg_test_surfxml_bypassed.c to see how it can be done.
4125 -- Arnaud Legrand <simgrid-devel@lists.gforge.inria.fr> Sat, 20 Aug 2005 23:25:25 -0700
4127 SimGrid (2.96) unstable; urgency=low
4132 * New! Exception handling with setjmp or such (code from OSSP ex) [MQ]
4133 This deprecates the xbt_error_t mechanisms.
4134 It modifies (simplifies) all XBT and GRAS API.
4135 MSG API keeps unchanged (exceptions raised by XBT are caught from
4136 within MSG and masked with existing error handling facilities)
4139 * New! Add a FATPIPE model. [AL]
4140 * New! Add a parallel task model. [AL]
4141 * New! Add automatically a loopback interface (in the default
4142 network model) if none was precised.
4145 * Bugfix: MSG_process_resume now works with the current running process.
4147 * New! Add MSG_parallel_task_create and MSG_parallel_task_execute. [AL]
4148 * Modification of MSG_task_get_compute_duration. Once a task has been
4149 processed, the value returned by this function is now equal to 0. [AL]
4150 * New! Add double MSG_task_get_remaining_computation(m_task_t task) and
4151 MSG_error_t MSG_task_cancel(m_task_t task). Add a state
4152 (MSG_TASK_CANCELLED) to MSG_error_t corresponding to the cancelation
4153 of a m_task. For now, MSG_task_cancel only works with computation
4155 * New! Add double MSG_get_host_speed(m_host_t h) that returns the speed
4156 of the processor (in Mflop/s) regardless of the current load on the
4158 * API Change: use proper naming convention for MSG_getClock and
4159 MSG_process_isSuspended: MSG_get_clock and MSG_process_is_suspended.
4161 * New! Add void MSG_task_set_priority(m_task_t task, double priority).
4162 This function changes the priority of a computation task. This priority
4163 doesn't affect the transfer rate. A priority of 2 will make a task
4164 receive two times more cpu power than the other ones. This function
4165 has been added to suit the needs of Nguyen The Loc and hasn't been that
4166 much tested yet. So if it fails, please report it and send me your code.
4168 * API Change: removed all functions and types that were marked "deprecated"
4169 since many months. Renamed MSG_global_init_args to MSG_global_init.
4171 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Mon, 8 Aug 2005 17:58:47 -0700
4173 SimGrid (2.95) unstable; urgency=low
4176 * Steal some nice code to GNU pth to fix context detection and usage [AL]
4177 * Cleanup in the xbt_config API; add configuration callbacks. [MQ]
4178 * Cleanup in the initialization API: the unused "defaultlog" is dead. [MQ]
4181 * Bugfix: Allow absolute paths for platform description files [MQ]
4182 * Bugfix: do free the variables after use. Leads to drastic performance
4184 * Implement max_duration (ie, timeouts) on resources [AL]
4187 * Implement MSG_config to configure MSG at runtime. xbt_cfg test on a real
4189 * Implement MSG_channel_select_from() to help GRAS now that SURF provide
4190 the needed support (timeouts) [AL]
4193 * Implement measurement sockets. You can now get the bandwidth between two
4194 hosts thanks to AMOK (see below). [MQ]
4195 * gras_datadesc_dynar() builds a dynar type descriptor, allowing to send
4196 dynar over the network (yeah) [MQ]
4197 * Real (even if simplistic) implementation of gras_os_myname() on RL [MQ]
4198 * simple/static token-ring example. [Alexandre Colucci and MQ]
4199 * Use MSG_channel_select_from() and remove the *slow* hack we had to put
4200 in place before [MQ]
4203 * Differentiate the types "char[22]" and "unsigned char[22]" in automatic
4204 type parsing. "short" and "long" modifiers were also ignored; other
4205 modifier (such as reference level) are still ignored. [MQ]
4206 * Embeed the buffer size within the buffer itself on SG. [MQ]
4207 That way, send() are atomic and cannot get intermixed anymore (at least
4208 the ones which are less than 100k; bigger messages still have the issue)
4209 * Array size pushed by the field, not by the field type (or each
4210 and every long int will push stuff to the cbps) [MQ]
4211 * use select() to sleep since it allows to portably sleep less than one
4214 GRAS (minor cleanups)
4215 * <project>.Makefile.local (generated from gras_stub_generator) |MQ]:
4218 * Type Callbacks now receive the gras_datadesc_type_t they work on as argument.
4219 * type category 'ignored' killed as it was never used and were difficult
4221 * whether a type can cycle or not is now a flag, leaving room for more
4222 flags (as "ignored", if we feel the need one day ;)
4223 * Rename raw sockets to measurement sockets since "raw" has another
4224 meaning in networking community.
4227 * Advanced Metacomputing Overlay Kit introduction. It is based over GRAS
4228 and offers features not belonging to GRAS but that most applications
4229 need. One day, it may be a set of plugins loadable at runtime.
4230 * New module: bandwidth
4231 bandwidth measurement between arbitrary nodes running this module. [MQ]
4233 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 30 Jun 2005 16:29:20 -0700
4235 SimGrid (2.94) unstable; urgency=low
4237 The first beta release of SimGrid 3 !
4241 * Update the main page and the FAQ. Adding references to gforge.
4244 * Add a gras_os_getpid function.
4247 * Add MSG_task_get_compute_duration() and MSG_task_get_data_size()
4248 * Extend the logs so that they also print PID, hostname, date, ... if
4250 * Convert the MSG example to the use of xbt_logs instead of PRINT_MESSAGE,
4251 and kill the old version which were in testsuite/
4252 * Rewrite tools/MSG_visualization/colorize.pl for using with logs instead
4256 * Add xbt_os_time(). As the rest of xbt/portability, this is not public
4257 for users. Instead, each programming environment (GRAS, MSG,...) use it
4258 when needed to provide such a feature to users.
4259 Don't shortcut the mechanism or you will also shortcut the virtualization
4260 you need on the simulator.
4264 * Cleanups in configury with regard to compile optimization/warning flags.
4265 Also add -fno-loop-optimize to any powerpc since it's the optimization
4266 killing gcc (< 3.4.0).
4267 * Doxygen cleanups: move MSG examples, kill the second Doxygen phase
4268 needed by MSG examples complications
4269 * Borrow configury beautifications from PHP
4272 * Bugfix: XBT_LOG_NEW_DEFAULT_CATEGORY now compiles without compiler
4273 warning (thanks loris for stumbling into this one).
4274 * Bugfix: stop loading private headers (gras_config.h) from the public
4278 * Change SIMGRID_INSTALL_PATH to GRAS_ROOT in Makefiles generated for user.
4279 * Rename gras_get_my_fqdn to gras_os_myname and implement it in the simulator
4280 RL would imply a DNS resolver, which is *hard* to do in a portable way
4281 (and therefore delayed).
4282 * Implement a real timer mechanism and use it in timing macros. This allows
4283 to avoid rounding errors and get a 0.000005 sec precision in timing
4284 macros. While I was at it, various cleanups:
4285 - allow to declare more than one timed section per file (fix a stupid bug)
4286 - move some private declaration to the right place
4287 - merge conditional execution and timing macros into emulation module
4288 - document the module
4289 - make sure the module cleanups its mess on gras_exit
4290 * Documentation improvements:
4291 - (new) how to compile applications using GRAS
4292 - (new) emulation support (timing macros)
4294 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 13 May 2005 10:49:31 +0200
4296 SimGrid (2.93) unstable; urgency=low
4298 Alpha 4 on the path to SimGrid 3 (aka the "neuf-trois" version)
4301 - Use Paje properly where used. Still to be sanitized properly.
4302 - Portability fix: Add an implementation of the contexts using pthread
4306 - Add xbt_procname(): returns the name of the current process.
4307 Use it to show the current process's name in all logging.
4309 - fix detection of older flex version and the reaction, since we do
4310 depend on modern ones (we use lex_destroy)
4311 - Better separation of SG and RL in the libs: remove all simulation code
4312 from libgras. As a result, this lib is now only 200k when stripped.
4313 Some of the xbt modules may also be duplicated (two sets and such) and
4314 should be cleaned/killed before SG3.
4315 - Insist on using xlC on AIX because of weird problems involving gcc there.
4316 - Cleanup the make remote stuff. This is now done by scripts
4317 tools/graspe-{master,slave} (GRAS Platform Expender). This is still
4318 mainly for our private use, but we're working on changing them to user
4321 - Bugfix: flush the socket on close only if there is some *output*.
4322 - Bugfix: flush idempotent when there's nothing to send (don't send size=0)
4324 - Add MSG_task_get_name. The task names are mainly for debugging purpose,
4327 -- SimGrid team <simgrid2-users@listes.ens-lyon.fr> Fri, 4 Mar 2005 14:32:37 -0800
4329 SimGrid (2.92) unstable; urgency=low
4331 Alpha 3 on the path to SimGrid 3
4335 - New! First try of benchmarking macros.
4336 - New! First try so that gras_stub_generator generate deployment and
4337 remote compilation helpers.
4339 - Bugfix: Initialization fix in msg_test.
4343 - Bugfix: applied patch to lexer so that it doesn't need a huge heap.
4345 - Bugfix: let dicts work with NULL content (_foreach didn't) and cleanups
4347 - API Change: gras_os_sleep to take the amount of seconds as a double.
4348 Accepting an int was error prone since it was the only location where
4349 seconds were coded as such. It leaded to damn rounding errors.
4350 - Bugfix: Hard to belive that timers ever worked before this.
4352 -- SimGrid team <simgrid2-users@listes.ens-lyon.fr> Wed, 23 Feb 2005 22:09:21 +0100
4354 SimGrid (2.91) unstable; urgency=low
4356 Alpha 2 on the path to SimGrid 3
4360 - Bug fix in the lmm_solver.
4362 - New! Interface to Paje (see http://www-id.imag.fr/Logiciels/paje/)
4363 through the function MSG_paje_output.
4364 - New! Introducing two new functions MSG_process_kill() and MSG_process_killall().
4365 - It is possible to bound the rate of a communication in MSG with
4366 MSG_task_put_bounded() (was already in the previous version but I had forgotten
4367 to write it in the changelog).
4368 - Bug fix to let GRAS run on top of MSG until we move it directly on top
4373 - Various cleanups to the autotools stuff
4374 - Begin to move Gras examples to examples/gras/
4375 - Let make distcheck work again (yeah!)
4377 - documentation overhauled using doxygen.
4378 gtk-doc-tools is dead in SimGrid now.
4379 - Automatically extract all existing logging categories, and add the list
4380 to the documentation (long standing one, to say the less)
4382 - Cleanup the known architecture table. Reorder the entries to group what
4383 should be, and use a more consistent naming scheme.
4384 (some of the test dataset are still to be regenerated)
4385 - New! Allow library to register globals on each process just as userdata
4387 This is implemented using a xbt_dict and not a xbt_set, so we loose the
4388 lookup time (for now).
4389 Use it in msg and trp.
4390 This cleans a lot the internals and helps enforcing privacy of the
4391 headers between the gras components.
4392 - New! Add a timer mechanism, not unlike cron(8) and at(1).
4393 - Bugfix: gras_os_time was delirious in RL.
4394 - Bugfix: gras_trp_select/RL don't run into the wall when asked to select
4396 - Reenable GRAS now that it works.
4398 -- Arnaud Legrand <Arnaud.Legrand@imag.fr> Mon, 14 Feb 2005 14:02:13 -0800
4400 SimGrid (2.90) unstable; urgency=low
4402 Alpha 1 on the path to SimGrid 3
4404 * It is a long time since the last release of SimGrid. I'm sorry about
4405 that but as I had told you, I was rewriting a lot of things. I apologize
4406 to those who had been reporting bugs to me and that I had not answered.
4407 If your bug is still in the new version, please tell me. Here is a
4408 summary of the main changes.
4410 * REVOLUTION 1: The SimGrid project has merged with the GRAS project
4411 lead by Martin Quinson. As a consequence SimGrid gains a lot in
4412 portability, speed, and a lot more but you'll figure it out later.
4413 SimGrid now comprises 3 different projects: MSG, GRAS and SMPI.
4414 I wanted to release the new MSG as soon as possible and I have
4415 broken GRAS, which is the reason why, for now, only MSG is fully
4416 functional. A laconic description of these projects is available
4417 in the documentation.
4419 * REVOLUTION 2: I have removed SG and I am now using a new simulation
4420 kernel optimized for our needs (called SURF but only the developers
4421 should use it). Hence, MSG is now roughly 30 times faster and I think
4422 that by rewriting a little bit MSG, I could event speed it up a little
4423 bit more. Beside the gain in speed, it is also much easier to encode a
4424 new platform model with SURF than it was with SG. More to come...
4426 * REVOLUTION 3: I have tried to change a little as possible the API of
4427 MSG but a few things really had to disappear. The main differences
4428 with the previous version are:
4429 1) no more m_links_t and the corresponding functions. Platforms are
4430 directly read from an XML description and cannot be hard-coded
4431 anymore. The same format is used for application deployment
4432 description. The new format is described in the documentation.
4433 Have a look in tools/platform_generation. There is a tiny script
4434 that converts from the old platform format to the new one. Concerning
4435 the application deployment format, parsing the old one is tricky.
4436 I think most of you should however be able to convert your files. If
4437 it is really an issue, I can write a C code that does the conversion.
4439 2) the toolbox tbx does not exist anymore. We now have a library
4440 with much more data-structures but without the hash-tables (we have
4441 dictionaries that are much faster).
4443 -- Arnaud Legrand <Arnaud.Legrand@imag.fr> Mon, 31 Jan 2005 10:45:53 -0800
4445 *****************************************************************************
4446 * Follows the old GRAS changelog. It does not follow the same syntax, but I *
4447 * don't feel like converting the oldies. (Mt) *
4448 *****************************************************************************
4451 Version 2.90: "the long awaited one"
4452 - Finished rewriting and debugging MSG. Rewrote the documentation.
4453 - disable GRAS for now since it needs to be ported to the newest SG
4456 - Finish the port to windows (using mingw32 for cross-compile)
4459 - Main loop and datastructures of SURF. A cpu resource object is
4460 functional. Surf can thus be used to create cpu's with variable
4461 performance on which you can execute some actions.
4463 2004-11-15 Martin Quinson
4464 - Port to ARM. Simply added the alignment and size descriptions. Should
4465 work, but the ARM machines are so slow that I didn't had the opportunity
4466 to 'make check' over there yet.
4468 2004-11-15 Arnaud Legrand
4469 - Trace manager now written. It uses a heap structure and is therefore
4470 expected to be efficient. It may however be speeded up (particularly
4471 when many events occur at the same date) by using red and black
4472 trees. One day maybe...
4473 - Max-min linear system solver written. It uses a sparse matrix
4474 structure taking advantage of its expected use. Most operations are
4475 O(1) and free/calloc are called as few as possible. The computation of
4476 the minimum could however be improved by using a red and black tree
4479 2004-11-03 Arnaud Legrand
4480 - Rename every gras_* function that was in xbt/ to its xbt_
4482 - Add a heap and a doubly-linked list to xbt
4483 - Added a dichotomy to the dictionaries. make check works as well before
4484 so I assume that the patch is correct. I do not know however if things
4485 run effectively faster than before now. :)
4487 Inclusion of the SimGrid tree in the GRAS one. The archive is renamed to
4488 SimGrid, and the version number is bumped to 2.x
4490 2004-10-29 Martin Quinson
4491 - Introduction of the remote errors.
4492 They are the result of a RMI/RPC on the remote machine.
4493 ErrCodes being scalar values, you can't get the host on which those
4494 errors did happen. Extending the error mechanism as in Gnome is possible.
4495 No idea yet whether it is a good idea.
4497 2004-10-28 Martin Quinson
4498 - Interface revolution: the Starred Structure Eradication.
4499 I used to do typedef struct {} toto_t; and then handle *toto_t.
4500 Arnaud (and Oli) didn't like it, and I surrendered. Now, you have:
4501 - ???_t is a valid type (builded with typedef)
4502 - s_toto_t is a structure (access to fields with .)
4503 - s_toto is a structure needing 'struct' keyword to be used
4504 - e_toto_t is an enum
4505 - toto_t is an 'object' (struct*)
4507 typedef struct s_toto {} s_toto_t, *toto_t;
4508 typedef enum {} e_toto_t;
4509 Moreover, only toto_t (and e_toto_t) are public. The rest (mainly
4510 s_toto_t) is private.
4512 - While I was at it, all gras_<obj>_free() functions want a gras_<obj>_t*
4513 so that it can set the variable to NULL. It was so for dicts and sets,
4514 it changed for dynars.
4516 - Fix a bunch of memleaks in dict_remove
4517 - Fix a bug in sg/server_socket opening: it failed all the time.
4519 2004-10-07 Martin Quinson
4520 - Speed up dynar lookup operation a bit.
4522 gras_dynar_get is dead.
4524 Now, you can choose between gras_dynar_get_cpy (the old gras_dynar_get
4525 but should be avoided for efficiency reasons) and gras_dynar_get_ptr
4526 (which gives you the address of the stored data).
4528 gras_dynar_get_as is an helpful macro which allows you to retrieve a
4529 copy of the data using an affectation to do the job and not a memcpy.
4531 int toto = gras_dynar_get_as(dyn,0,int); rewrites itself to
4532 int toto = *(int*)gras_dynar_get_ptr(dyn,0);
4534 It does not really speedup the dynar test because they are
4535 setting elements all the time (and look them seldom). But the dict does
4536 far more lookup than setting.
4538 So, this brings the dict_crash test from ~33s to ~25s (200000 elms).
4540 2004-10-05 Martin Quinson
4541 - Allow to (en/dis)able the cycle detection at run time.
4543 Whether we should check for cycle or not is now a property of each
4544 datatype. When you think there may be some cycle, use datadesc_cycle_set.
4545 datadesc_cycle_unset allow to remove this property when previously set.
4547 Note that the cycle detection is off by default since it impacts the
4548 performance. Watch the data you feed GRAS with ;)
4550 This property is hereditary. Any element embedded in a structure having it
4551 set have it set for the time of this data exchange.
4553 You should set it both on sender and receiver side. If you don't set it on
4554 sender side, it will enter an endless loop. If you forget on receiver
4555 side, the cycles won't be recreated after communication.
4557 - Header reorganization.
4558 Kill gras_private.h, each submodule must load the headers it needs.
4560 2004-10-04 Martin Quinson
4561 - Interface revolution: do not try to survive to malloc failure.
4563 Now, gras_malloc and friends call gras_abort() on failure.
4564 As a conclusion, malloc_error is not a valid error anymore, and all
4565 functions for which it was the only gras_error_t return value are
4566 changed. They now return void, or there result directly.
4567 This simplify the API a lot.
4569 2004-09-29 Martin Quinson
4570 - Re-enable raw sockets.
4571 Created by gras_socket_{client,server}_ext;
4572 Used with gras_raw_{send,recv}
4575 It should allow to kill the last bits of gras first version soon.
4577 This is not completely satisfactory yet (duplicate code with
4578 chunk_{send,recv}; a bit out of the plugin mechanism), but it should
4581 - Simplify transport plugin (internal) interface by not passing any
4582 argument to _server and _client, but embedding them in the socket
4585 2004-09-28 Martin Quinson
4586 - Finish the port to AIX.
4587 autoconf was my problem (segfault within the malloc replacement
4588 function. No idea why)
4590 2004-09-16 Martin Quinson
4591 - Fix some size_t madness on 64bit architectures.
4593 2004-09-08 Martin Quinson
4594 - Reduce the number of system headers loaded, overload some more system
4595 calls (such as malloc to cast the result of the system one, and work
4597 - Fix and reintroduce the config support
4599 2004-09-07 Martin Quinson
4600 - Source code reorganization to allow Arnaud to surf all over there.
4601 - Allow to document the logging categories.
4602 - Remove all uppercase from logging categories and useless cleanup in names.
4604 2004-08-18 Martin Quinson
4605 Version 0.6.2 (protocol not changed; API changed)
4606 - Interface cleanup: gras_msgtype_by_name returns the type (instead of a
4607 gras_error_t), and NULL when not found. Functions expecting a msgtype
4608 as argument (msg_wait; msg_send) deal with NULL argument by providing a
4609 hopefully usefull message.
4610 - Portability to prehistoric sparcs again
4612 2004-08-17 Martin Quinson
4613 Version 0.6.1 (protocol not changed; ABI not changed)
4614 - prealloc some buffers to speed things up
4616 2004-08-11 Martin Quinson
4617 Version 0.6 (protocol not changed; ABI expended)
4618 - The parsing macro can deal with the references, provided that you add
4619 the relevant annotations (using GRAS_ANNOTE(size,field_name))
4621 2004-08-09 Martin Quinson
4622 Version 0.5 (protocol not changed; ABI changed)
4623 - Allow to off turn the cycle detection code in data exchange at
4624 compilation time. It should be at run time, but I'm short of time (and
4625 the config stuff is still broken). That way, we keep dict out of the
4626 critical path, which is good because the performance is poor:
4627 - search not dichotomial yet
4628 - dynar give no way to access their content and memcpy everytime
4629 - In composed data description (struct, ref and so on), stop foolness of
4630 keeping the subtype's ID, but store the type itself. This keeps sets out
4631 of the critical path, which is good since they rely on dynar and
4632 dictionaries. The only loose of that is that we cannot detect the
4633 redeclaration of a structure/union with another content (but I'm not sure
4634 the code detected well this error before anyway). We still can detect
4635 the redefinition discrepancy for the other types.
4636 - Use a whole bunch of optimisation flags (plus -fno-strict-aliasing since
4637 it breaks the code because of type-punning used all over the place).
4638 This breaks on all non-gcc architectures (for now).
4640 All those changes (plus the buffer of last time) allow me to gain 2 order
4641 of magnitude on cruel tests consisting of 800000 array of integers on two
4642 level of a hierarchical structure (200 secondes -> 4 secondes)
4645 - the selector of reference must now return the type it points to, not
4646 the ID of this type.
4648 2004-08-06 Martin Quinson
4649 Version 0.4 (protocol changed; ABI not changed)
4650 - Allow to pass --gras-log argument to processes in simulation mode. Really.
4651 - New debugging level: trace (under debug) to see effect of GRAS_IN/OUT
4652 - Implement a buffer transport, and use it by default (it relies on tcp in
4653 real life and on sg in simulation).
4654 That's a bit hackish since I had a new field to the structure to store
4655 its data without interfering with the subtype ones. Inheritance
4656 is tricky in C. And that's a kind of reverse inheritance with one class
4657 derivating two classes. Or maybe a game with java interfaces. Anyway,
4658 that's damn hard in C (at least).
4659 Moreover, I got tired while trying to ensure plugin separation and
4660 genericity in SG mode. MSG wants me to do weird things, so let's go for
4661 cruel hacks (temporarily of course ;).
4662 See comment in transport_private.h:71
4663 - do not include all the _interface headers in private but in the files
4664 which really need them (to cut the compilation time when they are
4667 2004-07-26 Martin Quinson
4668 Version 0.3 (protocol not changed; ABI changed)
4669 - Major overhault of the datadesc interface to simplify it:
4670 - shorted the function names:
4671 s/gras_datadesc_declare_struct/gras_datadesc_struct/ and so on
4672 - add a trivial way to push/pop integers into the cbps without malloc.
4673 This allows to make really generic sub_type description, which simply
4674 pop their size of the stack.
4675 - add a function gras_datadesc_ref_pop_arr() which does what users want
4676 most of the time: Declare a dynamic array (which pops its size of the
4677 stack) and declare a reference to it. Poor name, but anyway.
4678 - kill the post-send callback, add a post-receive one
4680 2004-07-23 Martin Quinson
4681 Version 0.2 (protocol changed; ABI changed)
4682 - add some testing for cpbs in the test cases, and fix some more bugs.
4683 This invalidate again the little64 data file, since I cannot regenerate
4685 - remove an awfull optimization in the logging stuff, allowing me to:
4686 - understand it again
4687 - learn gcc how to check that the argument match the provided format
4688 - fix all errors revealed by gcc after that
4689 - internal keys of dict are not \0 terminated. Deal with it properly in
4690 loggings instead of segfaulting when the user want to see the logs :-/
4692 2004-07-22 Martin Quinson
4693 - Fix some stupid bug preventing cbps (callback postit) from working
4695 2004-07-21 Martin Quinson
4696 - Some documentation cleanups
4697 - remove the useless last argument of msgtype_declare
4698 - rename the Virtu functions to fit into the 'os' namespace
4699 - move headers src/include -> src/include/gras/ and stop fooling with
4700 gras -> . symbolic link
4701 - make distcheck is now successful
4703 2004-07-19 Martin Quinson
4705 - Build shared library also
4706 - Install html doc to the right location
4707 - stop removing maintainer files in make clean
4708 - build tests only on make check
4710 2004-07-13 Martin Quinson
4712 - No major issue in previous version => change versioning schema
4713 - Re-enable little64 convertion test now that Abdou kindly regenerated the
4714 corresponding dataset.
4716 2004-07-11 Martin Quinson
4718 - Get it working with any kind of structure (we can compute the padding
4719 bytes remotely for all the architectures I have access to)
4720 - Implement the structure parsing macro (still not quite robust/complete)
4721 - Improvement to the remote testing toysuite
4723 2004-07-10 Martin Quinson
4724 [autoconf mechanism]
4725 - get ride of a bunch of deprecated macros
4726 - actually run the test for two-compliment, not only compile it :-/
4727 - test whether the structures get packed (and bail out if yes. Damn.
4728 Alignment is a serious matter)
4729 - test whether the structures get compacted (but respecting the alignment
4730 constraints of each types)
4731 - test whether the array fields of structures can straddle alignment boundaries
4733 - Damnit, double are bigger than float (typo in creation of 'double' datadesc)
4734 (took me 2 hours to find that bug, looking at the wrong place)
4735 - Add gras_datadesc_declare_{union,struct}_close(). They must be used
4736 before sending/receiving and are used to compute the offsets of fields
4737 - Given that padding size depend even on compiler options, keep track of
4738 alignment and aligned_size only for the current architecture. Not a big
4739 deal since we send structure fields one after the other (seems
4741 - Add the datastructure used for IEEE paper by the PBIO guys to the test
4742 program, let it work on linux/gcc/little32. portability todo.
4744 2004-07-08 Martin Quinson
4745 - import and improve remote compilation support from FAST
4746 - make sure make check works on half a dozen of machines out there
4748 2004-07-07 Martin Quinson
4749 Let's say it's version 0.0.3 ;)
4750 - Implement conversions (yuhu!)
4751 - Let it work on solaris (beside conversion, of course)
4752 - Stupid me, using rand() to generate the conversion datatests in not wise.
4754 2004-07-06 Martin Quinson
4755 - Let make dist work, since I'm gonna need it to compile on remote hosts
4756 - Let Tests/datadesc_usage write the architecture on which the file was
4757 generated as first byte.
4758 - Add PowerPC (being also IRIX64), SPARC (also power4) and ALPHA
4759 architecture descriptions.
4760 - Add datadesc_usage.{i386,ppc,sparc} files being the result of execution
4761 on those architectures.
4762 - Optimization: send/recv array of scalar in one shoot
4764 2004-07-05 Martin Quinson
4765 - YEAH! GRAS/SG and GRAS/RL are both able to run the ping example !
4767 - Plug a whole bunch of memleaks
4768 - each process now have to call gras_{init,exit}. One day, their log
4769 settings will be separated
4770 - Continue the code factorisation between SG, RL and common in Transport.
4772 2004-07-04 Martin Quinson
4774 - Redistribution between SG and RL.
4775 We wanna have to accept in SG, so move accepted related parts of RL in
4776 the common part. (more precisely, the dynar of all known sockets is no
4777 more a static in transport.c, but part of the process_data)
4779 [gras_stub_generator]
4780 - Bug fix: Do call gras_process_init from gras_init (wasnt called in RL).
4782 2004-07-03 Martin Quinson
4783 - Create a new log channel tbx containing dict, set, log, dynar (to shut
4784 them all up in one shot)
4786 - Fix the ugly case of reference to dynamic array.
4787 - New (semi-public) function gras_datadesc_size to allow the messaging
4788 layer to malloc the needed space for the buffer.
4790 - gras_socket_close now expect the socket to close (and not its address to
4791 put NULL in it after it). This is because the socket passed to handlers
4792 is one of their argument (=> not writable).
4794 - propagate the interface cleanup from last week in datadesc, ie remove a
4795 superfluous level of indirection. User pass adress of variable
4796 containing data (both when sending and receiving), and not of a variable
4797 being a pointer to the data. Let's say that I like it better ;)
4798 The price for that is constructs like "int msg=*(int*)payload" in
4799 handlers, but it's a fine price, IMHO.
4801 - Let it work in RL (yuhu)
4803 2004-06-21 Martin Quinson
4805 - porting SG plugin and SG select to new standards (works almost).
4806 - plug memleaks and fix bugs around.
4809 - cleanup the prototype of data recv and force users to specify when they
4810 want to handle references to objects. Test case working even for cycles.
4811 - plug memleaks. Valgrind is perfectly ok with this.
4813 2004-06-12 Martin Quinson
4815 - cleanup the separation between plugin and main code in plugin creation
4817 2004-06-11 Martin Quinson
4819 - Reput hook for raw sockets, needed for BW experiments
4820 - kill a few lines of dead code
4821 [Data description] Interface cleanup
4822 - gras_datadesc_by_name returns the searched type or NULL.
4823 That way, no variable is needed to use a type desc once, which makes
4825 - gras_datadesc_declare_[struct|union]_append_name is removed. The last
4826 two parameters were strings (field name, type name), leading to
4828 [Dicos] Interface cleanup
4829 - gras_dico_retrieve -> gras_dico_get ; gras_dico_insert -> gras_dico_set
4830 This is consistant with the dynar API.
4832 2004-04-21 Martin Quinson
4834 - Porting to new standards.
4836 - interface cleanup.
4837 There is no bag anymore, no need to take extra provision to mask the
4838 pointers behind "ID".
4839 Better splitup of functions between files create/exchange/convert.
4840 This is still a bit artificial since convert and receive are so
4841 interleaved, but anyway.
4843 - add a queued message list to procdata (the ones not matching criteria
4845 - factorize some more code between SG and RL wrt procdata
4847 - use gras_exit in example to track memleaks
4848 - get rid of gs_example now that GS is properly integrated into gras
4849 - update run_test to integrate the latest tests (datadesc)
4851 - rename WARNINGn macros to WARNn since it prooved error-prone
4853 2004-04-19 Martin Quinson
4855 - register init/exit functions within gras module mechanism
4856 - send/receive function.
4857 Convertion is not implemented, but short-cutted if not needed.
4858 struct/array elements are sent one by one (instead of block-wise), but
4859 nobody really cares (yet). Get a prototype before optimizing.
4860 - tests (using a file socket) for DD send/receive on:
4861 - base types: int, float
4862 - array: fixed size, string (ie ref to dynamic string)
4863 - structure: homogeneous, heterogeneous
4864 - chained list, graph with cycle
4865 Believe it or not, valgrind is not too unhappy with the results. The
4866 cycle happily segfaults, but the others are ok. And I'm sick of pointers
4870 - Bugfix when using a filename explicitly (instead of '-')
4872 2004-04-09 Martin Quinson
4874 - factorize more code between RL and SG in socket creation
4875 - Complete the implementation and tests of:
4877 o file (only in RL, and mainly for debugging)
4879 I lost 3 days to design a portable address resolver, and then decided
4880 that the prototype mainly have to run on my box.
4881 Addressing portability too early may be like optimizing too early :-/
4883 - use gras_init in the Tests instead of the crappy parse_log_opt
4884 (the latter function is removed)
4885 [Conditional execution]
4886 - New functions: gras_if_RL/gras_if_SG (basic support for this)
4887 [Code reorganisation]
4888 - Get rid of libgrasutils.a since it makes more trouble than it solves.
4889 Build examples against the RL library, since there is no way to disable
4890 its creation for now.
4892 For information, the beginning of coding on GRAS was back in june
4893 2003. I guess that every line has been rewritten at least twice since