1 SimGrid (3.30.1) NOT RELEASED YET (v3.31 expected March 20. 2022, 15:33 UTC)
3 The ненасильство release. We stand against war.
5 Against the agression by a sick system that forces peoples to take arms against each other.
9 - Rework the internals, for simpler and modern code. This shall unlock many future improvements.
10 - You can now define plugins onto the DFS explorer (previously called SafetyChecker), using the
11 declared signals. See CommunicationDeterminism for an example.
12 - Support mutex, semaphore and barrier in DPOR reduction
13 - Seems to work on Arm64 architectures too.
14 - Display a nice error message when ptrace is not usable.
15 - New test suite, imported from the MPI Bugs Initiative (MBI). Not all MBI generators are integrated yet.
16 - Remove the ISP test suite: it's not free software, and it's superseeded by MBI.
19 - fix for FG#100 by ensuring small asynchronous messages never overtake larger
20 ones, conforming to the standard.
21 - replay: fix waitall behaviour to avoid forgetting requests and leaking
23 - tracing: ensure that we dump the TI traces continuously during execution and
24 not just at the end, reducing memory cost and performance hit.
25 - Update OpenMPI collectives selection logic to match current one (4.1.2)
28 - New signal: Engine::on_simulation_start_cb()
29 - Introduce a new execution mode with this_actor::thread_execute(). This simulate
30 the execution of a certain amount of flops by multiple threads ran by a host. Each
31 thread executes the same number of flops, given as argument. An example of this new
32 function can be found in examples/cpp/exec-threads.
33 - Reimplementation of barriers natively.
34 Previously, they were implemented on top of s4u::Mutex and s4u::ConditionVariable.
35 The new version should be faster (and can be used in the model-checker).
36 - Actor::get_restart_count(): Returns the number of reboots that this actor did.
39 - MSG_barrier_destroy now expects a non-const msg_barrier parameter.
41 New plugin: the Chaos Monkey (killing actors at any time)
42 - Along with the new simgrid-monkey script, it tests whether your simulation
43 resists resource failures at any possible timestamp in your simulation.
44 - It is mostly intended to test the simgrid core in extreme conditions,
45 but some users may find it interesting too.
48 - New model for parallel task: ptask_BMF.
49 - More realistic sharing of heterogeneous resources compared to ptask_L07.
50 - Implement the BMF (Bottleneck max fairness) fairness.
51 - Improved resource sharing for parallel tasks with sub-flows (parallel
52 communications between same source and destination inside the ptask).
54 - "--cfg=host/model:ptask_BMF": enable the model.
55 - "--cfg=bmf/max-iterations: <N>": maximum number of iterations performed
56 by BMF solver (default: 1000).
57 - "--cfg=bmf/selective-update:<true/false>": enable/disable the
58 selective-update optimization. Only invalidates and recomputes modified
59 parts of inequations system. May speed up simulation if sparse resource
60 utilization (default: false).
61 - This model requires Eigen3 library. Make sure Eigen3 is installed to use BMF.
64 - Modifications of the Profile mechanism, with some impact on users
65 - Addition of a new (S4U) method to init profiles from generic functions to improve versatility
66 - Fix initial behaviour of state_profiles
67 - Modify periodicity to behave like a period, and not like a loop delay
70 - Drop xbt_dynar_shrink().
73 - Made the following bindings static (previously member functions):
74 - Actor: Actor.kill_all(), Actor.by_pid()
75 - Host: Host.by_name(), Host.current(), Host.on_creation_cb()
76 - Mailbox: Mailbox.by_name()
77 - Added the following bindings:
78 - this_actor.warning()
79 - Mailbox.put_init() [example: examples/python/comm-waitallfor/]
80 - Comm.detach() [example: examples/python/comm-waitallfor/]
81 - Comm.wait_for() [example: examples/python/comm-waitfor/]
83 - Comm.wait_all_for() [example: examples/python/comm-waitallfor/]
84 - Mutex [example: examples/python/synchro-mutex/]
85 - Barrier [example: examples/python/synchro-barrier/]
88 - Remove target "make uninstall" which was incomplete and no longer maintained.
90 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
91 (FG: issues on Framagit; GH: issues on GitHub)
92 - FG#57: Mc SimGrid should test whether ptrace is usable
93 - FG#87: Smpi scripts fail with spaces in paths
94 - FG#100: [SMPI] Order of the message matching is not guaranteed
95 - FG#101: LGPL 2.1 is deprecated license
96 - FG#104: "make uninstall" not up-to-date
97 - GH#151: Missing mutexes for DPOR.
99 ----------------------------------------------------------------------------
101 SimGrid (3.30) January 30. 2022.
103 The Sunday Bloody Sunday release.
105 Main user-visible changes:
106 - The SimDag API for the simulation of the scheduling of Directed Acyclic
107 Graphs has been dropped. It was marked as deprecated for a couple of years.
108 We finally complete the implementation of what has been called SimDag++
109 internally, i.e., porting the different features of SimDag on top of S4U.
110 The new way to simulate the execution of dependent activities directly by
111 maestro (without any other actor) is details in the examples/cpp/dag-* series
113 - The removal of SimDag led us to also remove the export to Jedule files that
114 was tightly coupled to SimDag. The instrumentation of DAG simulation is still
115 possible through the regular instrumentation API based on the Paje format.
116 - We also dropped the old and clumsy Lua bindings to create platforms in a
117 programmatic way. It can be done in C++ in a much cleaner way now, which
118 motivates this suppression.
121 - Introduce on_X_cb() functions for all signals, to attach a new
122 callback to the signal X. The signal variables are now hidden and
123 only these functions should be used.
124 Rationale: this enables the usual deprecation scheme where functions
125 remain for 4 releases if we need to modify the signals, while the
126 current code with the signal variables directly visible prevents any
128 - New function: Engine::run_until(date), to split the simulation.
129 - New signal: Activity::on_veto, to detect when an activity fails to start.
130 - Signal change: Comm::on_start(Comm&, bool) has been replaced by
131 Comm::on_send and Comm::recv. These two signals respectively correspond to
132 when the sending or receiving side of a Comm is ready. They are raised at
133 the same locations as the former Comm::on_start signal.
134 - New function: Engine::track_vetoed_activities() to interrupt run()
135 when an activity fails to start, and to keep track of such activities.
136 Please see the corresponding example for more info.
137 - New functions: s4u::Comm::{sendto_init, set_source, set_destination} to enable
138 the use of vetoers with direct host-to-host communications. Both source and
139 destination have to set for a comm to start. Each call to these setters check
140 if all vetoes are satisfied. When it is the case, the comm starts. A use case of
141 these functions is given in examples/cpp/dag-scheduling.
142 - New functions: {Exec, Io}::update_priority allow you to modify the priority of
143 these kinds of activities during their execution. Behavior is detailed in
144 examples/cpp/io-priority/.
147 - Dynamic costs for MPI operations: New API to allow users to dynamically
148 change injected costs for MPI_Recv, MPI_Send and MPI_Isend operations.
149 Alternative for smpi/or, smpi/os and smpi/ois configuration options.
150 - Fix some issues with the replay mechanism.
153 - Function xbt::Extendable::get_data() is now templated with the type of the
154 pointee. Untyped function is deprecated. Use get_data<void>() if you still
155 want to retrieve void*.
158 - New section: "SimGrid MPI calibration of a Grid5000 cluster"
159 presenting how to properly calibrate MPI communications in SimGrid.
160 - Complete and reword the platform section, which is now completed.
163 - Thread contexts are used by default with Python bindings. Other kinds of
164 contexts revealed unstable, specially starting with pybind11 v2.8.0.
166 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
167 (FG: issues on Framagit; GH: issues on GitHub)
168 - FG#95: Wrong computation time for multicore execution after pstate change
169 - FG#97: Wrong computation time for ptask+multicore+pstates
170 - FG#98: SMPI offline simulation is inconsistent with the online simulation
171 (deadlocks / message truncation)
172 - FG#99: Weird segfault when not sealing an host
174 ----------------------------------------------------------------------------
176 SimGrid (3.29) October 7. 2021
178 The "Ask a stupid question" release.
180 We wish that every user ask one question about SimGrid to celebrate.
181 On Mattermost, Stack Overflow or using the issues tracker.
184 New modeling features:
185 - Non-linear resource sharing, modeling resources whose performance heavily degrades with contention:
186 - The total capacity may be updated dynamically through a callback
187 and depends mainly on the number of concurrent flows.
188 - Examples (both cpp and python): io-degradation, network-nonlinear, exec-cpu-nonlinear
190 - Dynamic factors: model variability in the speed of activities
191 - Each action can now have a factor that affects its progression.
192 This multiplicative factor is applied when updating the amount of work
193 remaining, thereby an activity with factor=0.5 only uses half of the
194 instantaneous power/bandwidth it is allocated and will appear twice
195 slower than what it actually consumes.
196 - This can be used to model a overhead (e.g., there is a 20 bytes
197 header in a 480 bytes TCP packet so the factor 0.9583) but the novelty
198 is this factor can now easily be adjusted depending on activity's and
199 resources characteristics.
200 - This existed for network (e.g., the effective bandwidth depends
201 on the message in SMPI piecewise-linear network model) but it is now
202 more general (the factor may depend on the source and destination and
203 thus account to different behaviors for intra-node communications and
204 extra-node communications) and is available for CPUs (e.g., if you
205 want to model an affinity as in the "Unrelated Machines" problem in
206 scheduling) and disks (e.g., if you want to model a stochastic
208 - For that, resources can be provided with a callback that computes
209 the activity factor when creating the action.
210 - Example: examples/cpp/exec-cpu-factors
211 - The same mechanism is also available for the latency, which
212 allows to easily introduce complex variability patterns.
215 - Added support to programmatic platform creation in Python.
216 Example: examples/python/clusters-multicpu
219 - Disk and Host now have a set_sharing_policy() too, for non-linear sharing.
220 This can only be set through the API, not through XML files.
224 - Multiple fixes to ensure reproducibility of tracing
225 - scan/excan can now be replayed
226 - wait action now uses ranks and not pid, as the other ones.
227 - smpi/init and smpi/finalization-barrier are now valid for replays.
228 - exit() is now intercepted by SMPI to avoid premature shutdown of
229 simulation. First non 0 return codes is returned as simulation return
233 * New section "Release Notes" documenting recent and current developments.
234 * New section "Modeling I/O: the realistic way" presenting how to properly model disks in SimGrid.
235 * Improvements in API Reference for C++ and Python interfaces.
238 - Make wifi creation compatible with ns-3 version 3.34 too.
240 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
241 (FG: issues on Framagit; GH: issues on GitHub)
242 - FG#77: Search feature of doc is broken (update sphinx theme version)
243 - FG#78: Multiple fixes for SMPI replay:
244 - TI tracing of allotallv/w was outputting wrong values
245 - MPI_LOGICAL in fortran is actually 32 bits wide, and not 8.
247 ----------------------------------------------------------------------------
249 SimGrid (3.28) July 14. 2021
251 The Victoriadagarna Release.
254 - C++ platform interface: Users can now describe their platform directly in C++.
255 This provides greatly flexibility and performance improvement for complex
256 platforms. Main features:
257 - Fat-Tree/DragonFly/Torus composing: allows you to create clusters of
258 "zones", instead of single hosts. This feature enables the description
259 of clusters with complex hosts, composed of several CPUs, GPUs, etc.
260 - StarZone: new zone with a Star-like topology. The routes are defined
261 as a set of links used to communicate from node to everybody (node<->ALL).
262 - Split-Duplex links: auxiliary method to create split-duplex links in
263 the platform, easing its utilisation. It automatically creates both UP
264 and DOWN links (similarly as done in XML).
265 - Please refer to the documentation and the examples included:
266 e.g. examples/cpp/clusters-multicpu/ and examples/platforms/*.cpp.
267 - New plugin: Producer-Consumer with monitor. Just requires to include the
268 include/simgrid/plugins/ProducerConsumer.hpp header to be used. See the
269 associated example (examples/cpp/plugin-prodcons).
272 - New: s4u::Comm::wait_all_for() (like s4u::Comm::wait_all, but with a timeout),
273 s4u::Io::wait_any(), s4u::Io::wait_any_for().
274 - Methods test_all/test_any/wait_all/wait_any in s4u now take their vector
275 parameter by reference, instead of a pointer.
276 - Fixed a bug where Activity::wait_for() killed the activity on timeout.
277 Explicitly cancel the activity to get back to previous behavior.
278 - New: Link::set_concurrency_limit() to limit the amount of concurrent flows.
281 - The default SMPI compiler flags are no more taken from the environment.
282 They can be explicitly set through cmake parameters SMPI_C_FLAGS,
283 SMPI_CXX_FLAGS, or SMPI_Fortran_FLAGS.
285 --cfg=smpi/finalization-barrier: which can be used to add
286 a barrier inside MPI_Finalize. This can help for some codes which cleanup
287 data attached to a process, but still used in other SMPI processes.
288 --cfg=smpi/errors-are-fatal: True by default, behaves like if MPI_ERRORS_RETURN
289 is active when set to false, to keep going after a small error
290 --cfg=smpi/pedantic: True by default. Do not report some harmless MPI errors
291 which may or may not be problematic in the end.
293 - fix behaviour, as maximum iteration count could be ignored
294 - add SMPI_SAMPLE_LOCAL_TAG and SMPI_SAMPLE_GLOBAL_TAG macros, to allow user to
295 use sampling when the same kernel is called with a different set of parameters
296 which have an impact on the timing.
297 - realloc is now intercepted, to be coherent, as malloc/calloc/free were already.
298 It should now work with smpi/auto-shared-malloc-thresh.
299 - Improve error handling and reporting in multiple places
300 - Improve correctness checks on the MPI code.(MPI_Op and MPI_Datatype
301 validity checks, truncated messages are now an error, return errors
302 when explicitely deleted handles are reused, ...)
303 - RMA: multiple fixes and stability improvements.
304 - analysis (-analyze flag in smpirun):
305 - SMPI can now report buffer leaks as well as MPI handles leaks,
306 if code was compiled without SMPI_NO_OVERRIDE_MALLOC.
307 - if -trace-call-location is used when compiling, SMPI can report
308 origin of leaked handles/buffers
309 - group leaks by type/origin in output message if possible
310 - New implemented MPI calls: MPI_Comm_test_inter
313 - Changed internal implementation of bandwidth factors in network models.
314 Models affected: CM02, LV08 (default), SMPI, IB.
315 Configuration affected: "network/bandwidth-factors" and "smpi/bw-factors".
316 Bandwidth factors are applied to communications to describe that users
317 cannot use 100% of the available bandwidth. For example, the default network model,
318 LV08, applies a factor of 0.97 to the bandwidth. In older versions, this
319 behavior was implemented by limiting the bandwidth available in the LMM
320 system for this flow. This may give the false impression that there is
321 bandwidth available for other flows due to its underutilization, especially
322 for the dynamic bandwidth factors used in SMPI models.
323 To avoid this, we have modified the implementation so that each flow uses the
324 maximum physical bandwidth according to the LMM system.
325 However, the actual throughput of the flow seen by the user is defined by
326 the physical bandwidth multiplied by the bandwidth factor.
327 This change impacts on the simulation results for all network models on
328 which we have bandwidth factors configured.
329 *****************************************
330 *DO NOT MIX 3.28 RESULTS WITH OLDER ONES*
331 *****************************************
332 This change may impact on the timing of your simulation results.
333 Take care when comparing simulations from different SimGrid's
334 versions. Sorry for the inconvenience.
335 - Dynamic network factors: users can configure a callback to define
336 the network factors dynamically. This API is available at
337 simgrid::kernel::resource::NetworkModelIntf.
338 - Users have access to complete information about the current communication
339 to decide which factor to apply. This includes: message size, source and
340 destination hosts, links and zones traversed.
341 - Dynamic factors for both latency and bandwidth.
342 - For more details, see the example in (examples/cpp/network-factors).
343 - Plugin host_energy: the "watt_off" and "watt_per_state" host properties,
344 deprecated since version 3.24, are no longer supported. Instead, use
345 "wattage_off" and "wattage_per_state".
348 - xbt_assert is not disabled anymore, even when built with enable_debug=off.
351 - New tutorial: Model-checking and formal assessment
352 - New sections: "Demystifying the routing" and "C++ platforms"
353 - Update and improve the part on visualization in MPI and Algo tutorials.
354 - Improve the section on routing: how to define it, how it's used internally
355 - Fix many issues, broken links and missing references in doxygen and Sphinx
358 - Lua platform files are deprecated. Their support will be dropped after v3.31.
361 - Legacy functions deprecated in this release: SIMIX_get_clock(), SIMIX_run().
363 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
364 (FG: issues on Framagit; GH: issues on GitHub)
365 - FG#47: Complete and fix tests from teshuite/s4u/activity-lifecycle
366 - FG#64: Configuring smpi/IB-penalty-factors
367 - FG#67: Running computation concurrently with MPI_Iallreduce
368 - FG#69: Tutorial misleading users of pre-v3.26 versions of SimGrid
369 - FG#71: Segmentation fault on invalid gw_src/gw_dst
370 - GH#322: Issue when an actor kills his host vm
372 ----------------------------------------------------------------------------
374 SimGrid (3.27) March 29. 2021
376 The Ragnar Release (anniversary of the siege of Paris by Vikings in 845)
378 Main user-visible changes:
379 - All functions marked as deprecated for one year were removed.
380 - Removed all that was related to the "Storage" type in all APIs and bindings.
381 "Disks" have been introduced more than a year ago to replace them for the better.
382 It's time to finish this replacement.
383 - SMPI ABI breaks from previous version: MPI global handles (predefined datatypes,
384 ops, COMM_WORLD) are now defined differently, and can be used in initializers,
385 avoiding "initializer element is not constant" errors with some codes. Please be
386 careful to recompile your MPI codes if switching to this new SimGrid version.
387 - Network model ns-3 now requires version ns-3.28 or higher.
388 - Removed some option aliases that were deprecated since v3.23 (June 2019)
389 - 'verbose-exit' is now 'debug/verbose-exit'
390 - 'simix/breakpoint' is now 'debug/breakpoint'
391 - 'clean-atexit' is now 'debug/clean-atexit'
394 - New functions: Comm::sendto_{init,async} to initiate a communication
395 on between two (possibly remote) hosts.
396 - Define new template functions Mailbox::get_unique(), returning a std::unique_ptr.
397 - Functions Mailbox::get() and Mailbox::get_async() are now templated with the
398 type of the pointee. Untyped functions are deprecated. Use Mailbox::get<void>()
399 or Mailbox::get_async<void>() if you really want to play with void*.
400 - Unify the interface of Activity::on_{start/activity}
401 - New function: Comm::get_dst_data()
402 - New function: Comm::set_payload_size() to set the amount of bytes to simulate.
405 - ptask should now work better with multicore hosts (FG#37).
406 - Internal cleanups and refactoring around activities, to prepare for SimDAG++.
407 - Internal cleanups and refactoring around models, to prepare for programmatic
409 - Modernize our tests of the performance models
413 - New section: Configuring the logs from the command line.
414 - New section: Programming API of logs.
415 - New section: Getting realistic results
416 - New section: Examples of SMPI Usage
417 - New part: SimGrid's Internals, with a section on Design goals
418 - Move back to the classical Breathe tool chain, and fix many small glitches.
421 - Handle leak checking: SMPI will now display a message if MPI handles are still
422 present at the end of a simulation. Option smpi/list-leaks:n will display the n
423 first leaked pointers and their types.
424 - smpi/display-allocs option : Display Memory allocations analysis, with hints
425 about the largest allocations. This only works for allocations with malloc/calloc
426 and not compiled with SMPI_NO_OVERRIDE_MALLOC
427 - "-analyze" option in smpirun will activate smpi/display-allocs and smpi/display-timing
428 - New implemented MPI calls: MPI_File_set_size, MPI_Aint_add, MPI_Aint_diff,
429 MPI_Type_get_extent_x, MPI_Type_get_true_extent_x, MPI_Status_set_elements_x
430 - Support for MPI C++ datatypes (MPI_CXX_BOOL, MPI_CXX_FLOAT_COMPLEX,
431 MPI_CXX_DOUBLE_COMPLEX, MPI_CXX_LONG_DOUBLE_COMPLEX)
432 - Replay now opens and parses the trace file only once for all ranks when possible.
434 - better handling of MPI_PROC_NULL
435 - MPI_Group_incl was broken in some cases
436 - PAPI tracing now fixed
437 - MPI_Errhandlers are properly handled for MPI_COMM_WORLD
438 - SMPI will now fail properly when receive size < sent size, instead of
439 just setting MPI_ERR_TRUNCATE and keep going.
440 - Proxy Apps ( https://framagit.org/simgrid/SMPI-proxy-apps ):
441 - Remove useless build patches and split build/run patches on the page
442 - Build in parallel when possible
443 - Test on yum-based systems
444 - New nightly tested Proxy-apps:
445 - OpenMPI mpi-test-suite
446 - Coral MCB, LSMS, Qbox, CLOMP
447 - ECP/Mantevo Cloverleaf3D, Ember
448 - Codevault bhtree_mpi
451 - Only initialize the Dwarf parser when needed, saving 10 seconds in most cases.
452 - Start to overhaul the implementation to modernize it (still ongoing).
455 - Drop simgrid::xbt::demangle(). Please use boost::core::demangle() instead.
456 - Drop xbt_dynar_cursor_rm(), xbt_dynar_search_or_negative(),
457 xbt_str_split_quoted(), xbt_str_split_quoted_in_place().
458 - Deprecate xbt_dynar_to_array().
459 - When an exception occurs in kernel mode, display both the actor and kernel stacks.
461 C binding and interface:
462 - Rename (lowercase) functions sg_actor_get_PID, sg_actor_get_PPID, sg_actor_by_PID.
463 - Constness requirement has been lowered for parameter argv of sg_actor_start()
464 and sg_actor_create() It's now (char* const*). The previous version is still
465 available as sg_actor_start_() and sg_actor_create_().
467 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
468 (FG: issues on Framagit; GH: issues on GitHub)
469 - FG#37: Parallel tasks are limited to 1 core per host
470 - FG#62: Running "smpirun -replay" on large networks
471 - FG!46: Fix a few potential memory leaks in SMPI colls
472 - GH#343: Wrong consumed energy when an exec timeouts
474 ----------------------------------------------------------------------------
476 SimGrid (3.26) December 15. 2020
478 The Release release (the French lockdown was eased today).
480 Important user-visible changes:
481 - SimGrid now requires a compiler with C++14 support.
482 Sibling projects should upgrade their FindSimgrid.cmake
483 - Surf precision default value is now 1e-9, instead of 1e-5. This was changed as
484 several users had difficulties to understand issues when using high bandwidth or
485 small latency events. The new value was already the default for SMPI and
486 should not cause too much performance hit. It can change some simulation
487 timings if simulation was skipping a lot of small events (which was actually
488 an issue per see). The old value can be restored with --cfg=surf/precision:1e-5.
489 - On some network models (L07, CM02, LV08), an implicit loopback link is created
490 for local communication. Default bandwidth was 500MBps and latency was 15µs,
491 which was rather bad. Default values have been changed to 10GBps and 0 latency.
492 Options network/loopback-lat and network/loopback-bw have been added to adapt
493 these values if needed. Network and routing models already providing separate
494 loopbacks (clusters and such) are not impacted by this change.
495 - SMPI now adds 16 bytes of header to each message sent, in order to simulate
496 metadata that are added to each MPI message by MPI libraries (tag,
497 src/dest, and communicator information). This may change simulation times
498 for very small message sizes, but should be more realistic.
501 - New routing 'WiFi' that makes it easier to specify a wifi network zone.
502 - New plugins: wifi_energy and link_load. See the associated examples.
503 - New examples: wifi networks, and communication suspend.
506 - LTO is now enabled for Intel/clang compilers.
507 - LTO behavior on GCC can be parameterized using LTO_EXTRA_FLAG in cmake.
508 Setting it to "auto" will use all available cores, while setting it to n will
509 use n cores to speedup link step (usage: cmake -DLTO_EXTRA_FLAG=4).
510 - Remove obsolete runtime option 'contexts/parallel-threshold'.
511 - Runtime option 'tracing/msg/process' renamed to 'tracing/actor'. The old name
512 has been kept for compatibility.
513 - Finally remove obsolete snake_case() aliases for runtime options.
514 - Further improve the documentation.
517 - the on_exit() of each actor is also executed when the simulation deadlocks.
518 - New functions: s4u::Activity:: suspend(), resume() and is_suspended()
519 An example is provided for s4u::Comm but it should work with Exec and Io.
522 - Update proxy apps coverage of new ECP apps: 60+ apps now tested nightly on
523 https://framagit.org/simgrid/SMPI-proxy-apps
524 - MPI/IO: supports names starting with "./"
525 - Fortran: many MPI/IO bindings, support for MPI_UB/LB, C MPI_INT/FLOAT/DOUBLE
527 - smpicc/cxx/ff/f90 now will actually perform definition checks at link time. When
528 building shared libraries, this may cause issues, so environment variable
529 SMPI_NO_UNDEFINED_CHECK can be added to disable this.
530 - most temporary files should now be created in /tmp dir (or equivalent).
531 If this one does not allow execution of code (noexec flag), this may cause issues.
532 Please use another tmp directory (using TMPDIR or equivalent system variable)
536 - A large refactoring is ongoing, but this should be transparent for users so far.
539 - Drop xbt_str_split().
541 C binding and interface:
542 - The return type of the sg_actor_on_exit() callbacks is now 'void'
543 (int value was previously ignored)
544 - Many C functions were renamed to follow a common naming style
545 (sg_object_get_something and sg_object_set_something). As usual, the deprecated
546 names are kept until version 3.30.
547 - Many MSG tests were converted to the new S4U's interface in C, that
548 was extended for that.
550 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
551 (FG: issues on Framagit; GF: issues on GForge; GH: issues on GitHub)
552 - FG#41: Add sg_actor_create C interface
553 - FG#43: xbt::random needs some care
554 - FG#48: The Impossible Did Happen (yet again)
555 - FG#50: Suspending an actor executed at the current timestamp fails
556 - FG#52: Zero-seconds timeout : "That's in the past already"
557 - FG#53: Crash while using ns-3 network model
558 - FG#54: How to suspend a comm?
559 - FG!22: Stochastic Profiles
560 - FG!24: Documentation and fix for xbt/random
561 - FG!35: Add a modeling hint for parallel links in doc
562 - FG!36: [xbt/random] Read/Write the state of the RNG
563 - FG!42: Link cumulated load plugin
564 - FG!44: Test condition variable wait_until+notify_all
565 - GF#18137: Allow different stack sizes?
566 - GH#128: Parallelization of simulation with --cfg=contexts/nthreads
567 - GH#139: Allow pthread creation in SMPI
568 - GH#336: Packet-level simulation using SMPI?
569 - GH#345: Error in the LMM while migrating a VM
570 - GH#346: [SMPI] error while loading shared libraries: libsimgrid.so
571 - GH#352: pip install / python setup.py install fail to find pybind11
572 - GH!337: Fix link_energy plugin for wifi platforms
573 - GH!339: Add Mailbox set_receiver method to python binding
574 - GH!344: Cast hugepages macros parameters to int64
576 ----------------------------------------------------------------------------
578 SimGrid (3.25) February 2. 2020 (aka 02 02 2020)
580 The Palindrom Day Release.
582 Important user-visible changes:
583 - Improve the Python usability (stability and documentation).
584 - A nasty synchronization bug was ironed out, see also below.
585 - Python's doc was organized as a separate tree, now integrated with C++.
586 - C bindings of S4U were not part of the doc.
587 - The C++ doc was also improved as methods are now split by theme.
588 - Further deprecate MSG: you now have to pass -Denable_msg=ON to cmake.
589 - This is mandatory to use the Java bindings.
590 - OFF by default; The plan is to completely remove MSG by 2020Q4 or 2021Q1.
591 - SimDAG++: Automatic dependencies on S4U activities (experimental)
592 - Some features are already implemented but not all of them
593 - Cannot block an activity until it's scheduled on a resource
594 - No heterogeneous wait_any() that would mix Exec/Comm/Io activities.
595 - See examples/s4u/{io,exec,comm}-dependent for what's already there.
598 - Upgrade documented Java dependency to Java 8 (earlier versions don't work).
599 - Drop support for Viva/Triva (old visualization tools), hence removed
600 TRACE_get_node_types() and TRACE_get_edge_types() functions.
603 - Require pybind11 version 2.4.
604 - Greatly improve locking during context switches with Python.
605 - Declaring Python callbacks to this_actor::on_exit is now working.
606 - No more tests are failing currently, even on win32.
609 - Actor: Merge signals on_migration_start/end into on_host_change
610 - Actor: Rename migrate() into set_host()
611 - Disk: Allow users to get the read and write nominal bandwidth values
612 - Exec: Implement wait_for(timeout)
613 - Io: Implement wait_for(timeout)
616 - Parse errors now raise a simgrid::ParseError that you may want to catch.
619 - In simgrid::kernel::resource::Model, the methods next_occuring_event*() have
620 been renamed to fix a spelling error. As usual, the previous definitions are
621 kept with a deprecation warning. However, to avoid runtime errors, it is now
622 forbidden to override these deprecated methods in a derived class. Please use
623 the new names immediately if you need to override them.
626 - Remove unused parameter 'free_ctn' for xbt_dict_set() and xbt_dict_set_ext().
627 - Drop unused functions for dicts and dynars: xbt_dict_cursor_get_elm,
628 xbt_dict_get, xbt_dict_get_elm, xbt_dict_get_ext, xbt_dict_get_key,
629 xbt_dict_remove, xbt_dict_reset, xbt_dynar_compare, xbt_dynar_dump,
630 xbt_dynar_foreach_ptr, xbt_dynar_free_data, xbt_dynar_free_voidp,
631 xbt_dynar_init, xbt_dynar_insert_at_as, xbt_dynar_merge,
632 xbt_dynar_remove_n_at, xbt_dynar_replace, xbt_dynar_search, xbt_dynar_set.
633 - New module: random, providing classical random numbers generators.
636 - New option : "smpi/auto-shared-malloc-thresh" which sets a value for
637 allocations' size above which they are considered "shared" by default (as if
638 they were performed through SMPI_SHARED_MALLOC macros).
639 Default = 0 = disabled feature.
640 Note : malloc, calloc and free are now overridden by smpicc/cxx by default.
641 This can cause some troubles if codes are already overriding these. If this
642 is the case, defining SMPI_NO_OVERRIDE_MALLOC in the compilation flags can
643 help, but will make this feature unusable.
644 - Input check is now performed much more consistently and outputs precise
645 warnings for each error found
646 - New supported calls : MPI_File_set_view, MPI_File_get_view
647 - MPI I/O now only supports disks, as storage is discontinued.
648 - MPI I/O allows opening files without specifying absolute path
649 - Note : SMPI configuration options are now initialized by smpi_init_options()
650 call, which should be called if SMPI is not being used through smpirun.
652 Fixed bugs (FG#.. -> framagit bugs; FG!.. -> framagit merge requests):
653 - FG#9: Python bindings crashing
654 - FG#39: Missing s4u::Comm::wait_any_for example
655 - FG#42: Add support for ThreadSanitizer (TSan)
656 - FG!19: Removing RngStream
657 - FG!20: A module for RNG calls
658 - FG!21: Choice between ad-hoc and standard distributions implementations
660 - FG!25: Fix link in Mutex doc
661 - FG!26: Fix links in SMPI interface doc
662 - GH#31: [MC] please provide an option to make MPI_Send asynchronous
663 - GH#305: Unscheduled tasks are still excuted
664 - GH#313: smpirun: manual outdated w.r.t. --help
665 - GH#321: [S4U] Get task remaining work ratio
666 - GH#323: Crash when an actor turn off his physical host
667 - GH#335: Missing links on dragonfly example svg
668 - https://lists.gforge.inria.fr/pipermail/simgrid-user/2019-November/004653.html:
669 MPI_Cart_sub was not working properly. Kudos to Jonathan Borne for the report.
671 ----------------------------------------------------------------------------
673 SimGrid (3.24) October 9. 2019
675 The Clean Disk Release.
678 - Introduce a s4u::Disk interface to manage the newly introduced <disk>
679 tag. s4u::Disk is called to supplant s4u::Storage in a near future. It
680 thus becomes the default resource to execute I/O operations. Examples
681 and the file system plugin have been modified to use disks instead of
682 storage elements. Storage can still be used but is doomed to disappear.
683 Users are thus adviced to update their simulators accordingly.
684 - Barrier::wait returns SG_BARRIER_SERIAL_THREAD for (only) one actor
685 for consistency with pthread_barrier_wait()
686 - Host::get_englobing_zone() returns the englobing netzone
687 - Actor::on_destruction is now called in the destructor
688 Actor::on_termination new signal called when the actor terminates
690 - Global signals are now part of the Engine:
691 - on_platform_creation: after config settings, before the XML parsing
692 - on_platform_created: right after the XML parsing
693 - on_time_advance: each time the clock advances
694 - on_simulation_end: after simulation, before cleanups
695 - on_deadlock: as the name implies.
697 - sg_{actor,host,link}_{data,data_set}() now all exist.
698 Use them to attach user data to the object and retrieve it.
701 - Introduce an experimental Wifi model. It sounds reasonable
702 according to the state of the art, but it still has to be properly
703 validated, at least against ns-3 if not against reality.
704 - Improved the usability of ns-3. Several bugs were ironed out.
705 - host_energy: Wattage was expressed as 'idle:oneCore:allCores'.
706 It is now expressed as 'idle:epsilon:allCores' to properly model the
707 consumption of non-whole tasks on mono-core hosts. More info in the doc.
710 - convert a new set of functions to the S4U C interface and move the old MSG
711 versions to legacy (MSG_process_self*, MSG_process_{un}ref, ...)
714 - Fortran bindings for DVFS have been removed.
715 - Add support for MPI_Irsend, MPI_Rsend, MPI_Rsend_init, MPI_Bsend,
716 MPI_Ibsend, MPI_Bsend_init, MPI_Buffer_attach, MPI_Buffer_detach
717 - SMPI can now be selected by cmake's find_module(MPI) with
718 MPI_C_COMPILER, MPI_CXX_COMPILER, MPI_Fortran_COMPILER variables.
719 - Add support for MPI Errhandlers in Comm, File or Win. Default errhandler is now
720 MPI_ERRORS_ARE_FATAL, so codes which were sending warnings may start failing.
721 - trace-call-location can be used with TI traces, and replayed, and is compatible
722 with smpi/comp-adjustment-file.
723 - sleep events are now correctly traced/replayed.
724 - Default for trace-call-location is now to use file names and not full paths.
725 To revert to previous behavior (in case of collision of filenames), option
726 "smpi/trace-call-use-absolute-path" can be set to yes.
729 - Use the included xxHash as an hash implem when C++14 is usable.
730 - Option model-checker/hash was removed. This is always activated now.
731 - New option smpi/buffering controls the MPI buffering in MC mode.
732 - MPI calls now MC_assert() that no MPI_ERR_* code is returned.
733 This is useful to check for MPI compliance.
736 - New section on plugins: how to define a new one, and existing ones.
739 - xbt_mutex_t and xbt_cond_t are now marked as deprecated, a new C interface
740 on S4U is already available to replace them by sg_mutex_t and sg_cond_t.
743 - Introduce the <disk> tag as a replacement of the <storage>, <storage_type>,
744 and <mount> tags. The rationale is finish to decouple what should be handle
745 by SimGrid kernel (i.e., resources and activities) from plugins built in
746 user space (e.g., the file system plugin). This new tag currently accepts
747 only three attributes (id, read_bw, and write_bw). All the other information
748 that was declared with the storage related tags now has to be expressed as
749 properties. An example of platform using this new tag is available at
750 examples/platforms/hosts_with_disks.xml
753 - 'expect signal' can now accept more than one potential signal.
755 Fixed bugs (FG#.. -> framagit bugs; FG!.. -> framagit merge requests):
756 - FG#28: add sg_actor_self (and other wrappers on this_actor methods)
757 - FG#29 and FG#33: provide a new C API to mutexes and condition variables
758 - FG#30: convert MSG_process_{un}ref to sg_actor_{un}ref
759 - FG#31: per-actor data
760 - FG#34: SG_BARRIER_SERIAL_THREAD?
761 - FG#35: model-checker does not like buster-produced binaries
762 - FG!13: MC: complete workaround in the error msg seen on modern systems
763 - FG!15: execute_flops now logs compute
764 - FG!16: Fix the ns-3 bindings when several flows are simultaneously finishing
765 - FG!17: ns-3: unblock the right number of communications + others issues
766 - FG!18: Improving the performance of the ns-3 bindings
767 - GH#189: Energy consumption of parallel tasks
768 - GH#219: Error in the throughput of TCP transfer
769 - GH!330: Minor polishing of English: Configuring_Simgrid
770 - GH!331: Fix a doc error about actors (Tutorial_algorithms)
771 - GH!332: Add '-O0' flag for: cmake -DCMAKE_BUILD_TYPE=Debug
772 - GH!334: Rework energy plugin, again
774 ----------------------------------------------------------------------------
776 SimGrid (3.23.2) July 8. 2019
779 - Nicer introduction page.
780 - Migrate the "Deploy your application" page to the new doc.
781 - Move Java as a subtree of MSG.
784 - Rename simgrid::TimeoutError to simgrid::TimeoutException.
787 - Drop xbt_dynar_sort_strings().
790 - Really fix FG#26: Turning off a link should raise NetworkFailureException
791 - FG#27: Wrong exception thrown to wait_any when link is turned off
792 - GH#328: Java: Canceling multiple tasks in a single vm/host
794 ----------------------------------------------------------------------------
796 SimGrid (3.23) June 25. 2019
798 The Exotic Solstice Release.
801 - SunOS and Haiku OS support. Because exotic platforms are fun.
802 - Stop setting random seed with srand48() at initialization.
803 - Use addr2line as a fallback for stacktraces when backtrace is not available.
804 - Build option -Denable_documentation is now OFF by default.
805 - Network model 'NS3' was renamed into 'ns-3'.
808 - Simgrid can now hopefully be installed with pip.
811 - wait_any can now be used for asynchronous executions too.
814 - New log appenders: stdout and stderr. Use stdout for xbt_help.
815 - Drop xbt_dict_dump.
818 - 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
819 - MPI/IO is now supported over the Storage API (no files are written or read, storage is simulated). Supported calls are all synchronous ones.
820 - MPI interface is now const correct for input parameters
821 - MPI_Ireduce, MPI_Iallreduce, MPI_Iscan, MPI_Iexscan, MPI_Ireduce_scatter, MPI_Ireduce_scatter_block support
822 - Fortran bindings for async collectives.
823 - MPI_Comm_get_name, MPI_Comm_set_name, MPI_Count support.
826 - Remove option 'model-check/record': Paths are recorded in any cases now.
827 - Remove option 'model-check/sparse-checkpoint': Checkpoints are now
828 always sparse. That's an immense gain in memory, and can even be
829 faster because of cache effects. So there is no need to clutter the
830 code to allow the user to go for the unefficient mode.
833 - Remove the lagrange-based models (Reno/Reno2/Vegas). The regular
834 models proved to be more accurate than these old experiments.
836 Fixed bugs (FG=FramaGit; GH=GitHub -- Please prefer framagit for new bugs)
837 - FG#1: Broken link in error messages
838 - FG#2: missing installation documentation
839 - FG#3: missing documentation in smpirun
840 - FG#6: Python bindings not available on PyPI
841 - FG#7: simple cmake call requires doxygen
842 - FG#8: make python bindings an optional dependency
843 - FG#10: Can not use MSG_process_set_data from SMPI any more
844 - FG#11: Auto-restart actors forget their on_exit behavior
845 - FG#12: -Denable_lto=OFF doesn't disable LTO
846 - FG#13: Installs unstripped file 'bin/graphicator'
847 - FG#14: Installs the empty directory 'doc/simgrid/html'
848 - FG#15: Setting -Denable_python=OFF doesn't disable the search for pybind11
849 - FG#17: Dead link in doc (pls_ns3)
850 - FG#20: 'tesh --help' should return 0
851 - FG#21: Documentation link on http://simgrid.org/ broken
852 - FG#22: Debian installation instruction are broken
853 - FG#26: Turning off a link should raise NetworkFailureException exceptions
854 - GH#133: Java: a process can run on a VM even if its host is off
855 - GH#320: Stacktrace: Avoid the backtrace variant of Boost.Stacktrace?
856 - GH#326: Valgrind-detected error for join() when energy plugin is activated
858 ----------------------------------------------------------------------------
860 SimGrid (3.22) April 1. 2019
862 The Easter Christmas Release (this one is somewhat late).
865 - We are excited to introduce the SimGrid/S4U interface to your neighborhood
866 - Not complete yet: asynchronous activities (amongst others) are still missing
867 - Still ongoing: the interface may change in the future. We need more
868 testers! Please report any glitches.
869 - No new project using Java should start now. Please switch to Python.
872 - Some of the internal cleanups may lead to speed improvements:
873 - The hard limitation on the amount of simulated actors with
874 Java+Mac was removed. Now, the available memory is the only limit.
875 - Our refcounting was tidyied, leading to 10% speedups in some cases.
876 - We are still working on making our code robust to the actor kills
877 and hosts' churn. Things are improving, but it's not perfect yet.
878 - Replaced our own code to display a backtrace (that was forking addr2line)
879 with the Boost.Stacktrace library.
880 You won't see your backtraces without this optional dependency.
881 - Bump cmake dependency to 3.5 (provided by Ubuntu 16.04).
882 - Stop setting random seed with srand() at initialization.
885 - In <host> and <peer>, 'availability_file' is now 'speed_file'.
886 XML file version remains 4.2 since old files are still compatible.
889 - Process termination which was broken at version 3.21 has been repaired.
890 - Expose host load plugin: loadInit, getCurrentLoad, getComputedFlops, getAvgLoad
891 - Hide the examples into examples/deprecated. New users should use Python.
894 - Drop MSG_process_create_from_stdfunc() from the API.
895 This C++ function was a pimple in the C API, made necessary at some
896 point by the Java bindings. This is fixed now.
897 - Hide the examples into examples/deprecated. New users should use S4U.
898 - MSG_process_create and MSG_process_attach now crash if the host used
899 to run this process is off.
900 - Fix the protype of MSG_process_on_exit()
901 Now use (int,void*) callbacks instead of (void*,void*) ones.
902 The implementation was ways too messy to actually work, I guess.
905 - Change the way SMPI_SAMPLE_* macros work to avoid invalidating cache
906 too often and provide more accurate timings.
907 - Add -gdb, -lldb, and -vgdb shortcuts to help debug MPI codes with smpirun
908 - MPI_Alltoallw support
909 - Partial MPI nonblocking collectives implementation: MPI_Ibcast, MPI_Ibarrier,
910 MPI_Iallgather, MPI_Iallgatherv, MPI_Ialltoall, MPI_Ialltoallv, MPI_Igather,
911 MPI_Igatherv, MPI_Iscatter, MPI_Iscatterv, MPI_Ialltoallw.
912 - MPI_Request_get_status, MPI_Status_set_cancelled, MPI_Status_set_elements
914 - Basic implementation of generalized requests (SMPI doesn't
915 allow MPI_THREAD_MULTIPLE) : MPI_Grequest_complete, MPI_Grequest_start
918 - Drop sg_cmdline. Please use xbt_cmdline instead.
919 - Drop the C xbt_os_mutex_t; Use the C++11 std::mutex.
920 - Drop the C xbt_os_sem_t; Use the C++ xbt::OsSemaphore.
921 OsSemaphore is implemented in a portable way with C++11 threads.
922 This should allow much more threads to be created at the same time,
923 allowing Mac and Java users to simulate many more actors.
924 - Implement the 'thread' factory with std::thread instead of xbt ones.
925 It is not possible to set the stack size with threads anymore, but
926 -fsplit-stack is the way to go nowadays when using threads.
927 - Drop the xbt_os_thread_t module (now unused)
928 - Drop xbt_ex_display(), use simgrid::xbt::log_exception() instead.
929 - Drop xbt_str_join_array().
930 - Drop cunit, use Catch2 instead.
933 - Many cleanups in the kernel::activity namespace. This was long
934 overdue, and shall open the path to many future endeavors.
937 - #132: Java: a process can not shut down its own host
938 - #220: S4U: detached send causes exception if sender terminates soon after sending
939 - #261: Document the parameters of parallel execution's constructor
940 - #300: [s4u] BarrierPtr is missing
941 - #314: SMPI args internal cleanup
942 - #316: Fix a bug related to the CPU utilization of multi-core VM
943 - #318: Invalid trace file when using option --cfg=tracing/smpi/display-sizes:yes
944 - #324: S4U: Attempting to create an actor on turned off host segfaults instead of throwing
945 - #325: Turning off a host has different behavior on sleeping actors and computing actors
947 ----------------------------------------------------------------------------
949 SimGrid (3.21) October 3. 2018
951 The Restarting Documentation (TRD) Release.
954 - Convert the user manual to Sphinx for improved usability.
955 Unstable version now hosted on https://simgrid.frama.io/simgrid
956 Many glitches remain; stay tuned.
957 - Restrict the Doxygen reference API to the installed header files.
958 (documenting all internals this way is overkill + doxygen scales badly)
959 - New tutorial on S4U (highly inspired from the old MSG one, but with
960 a git repository to fork as a starting point, and a docker image)
961 - Started but not finished an SMPI tutorial inspired from the JLPC'14 one.
962 - The Developper manual is still to be converted (not compiled until then)
963 - Some parts are still missing in this conversion (such as the
964 platform and deployment sections) while others were blindly converted
965 and would need more love (such as the configuration flags).
966 Things will certainly further improve in the future releases.
969 - Fully reimplement auto_restart mechanism that was utterly broken
970 (fix #22, #131 and #281 that were all very related)
971 - Implement semaphores (fix #303 and #291)
972 - When creating an actor from a function and its parameters,
973 move-only parameters are not allowed anymore, as it would prevent
974 the actor to be restartable if its parameters are consumed on run.
975 - s4u::Io: IOs go asynchronous as activities. New methods in s4u::Storage:
976 - io_init(sg_size_t, s4u::Io::OpType) to create a READ or WRITE asynchronous
977 IO operations that can be started, waited for, or canceled as a regular
979 - read_async(sg_size_t) and write_async(sg_size_t) which are wrappers on
983 - Rename 'power' and 'power_used' variables into 'speed' and 'speed_used'
984 - New host variable: 'core_count'
987 - Remove xbt_os_thread_specific features
988 - Remove portability wrapper to condition variables
989 - Remove xbt_os_thread_yield()
992 - MPICH collective selector now mimics MPICH 3.3b
993 - OpenMPI collective selector now mimics OpenMPI 3.1.2 (default "tuned" setting)
994 - MPI_Init(NULL,NULL) is now allowed
995 - smpi/wtime option now injects time in gettimeofday or clock_gettime calls
996 - Command-line arguments should now be handled properly in Fortran simulations
997 - MPI Attributes and related callbacks should work in Fortran
998 - Apps using C + Fortran should now work
999 - MPI_* calls now check for non MPI_SUCCESS return values and emit warnings
1000 - Support MPI_Error_String
1003 - Due to an internal bug, Msg.run() must now be your last line.
1004 We hope to fix it in a future release, and we are sorry for the inconvenience.
1007 - #22: Process autorestart seem to only work with CAS01 cpus
1008 - #56: Feature request: dynamic SMPI replay
1009 - #93: simgrid should not eat --help
1010 - #111: How to change the loopback link characteristics?
1011 - #116: Platform cluster radical
1012 - #117: Platform cluster/host order
1013 - #129: Replay_multiple on steroid
1014 - #131: Java : autostart does not work
1015 - #143: Setting a breakpoint at a given time
1016 - #235: Network energy models should be integrated
1017 - #264: Add ptask L07 resource tracing
1018 - #271: Dynamic and manual replay of SMPI traces
1019 - #279: Breakpoints option uses time deltas instead of absolute time
1020 - #281: Daemonized actor no longer daemonized after an auto-restart
1021 - #282: TIT convertor erase traces when using absolute path in the trace list file
1022 - #285: segfault when a s4u actor kills itself with msg process tracing activated
1023 - #286: Pajé traces are not exposing the number of cores
1024 - #287: Command-line parsing should stop when encountering '--'
1025 - #288: MPI_Init(NULL, NULL)
1026 - #289: Improve documentation of Actor::on_destruction and this_actor::on_exit()
1027 - #290: Method to check if a mailbox has a message ready to be consumed
1028 - #291: [s4u] semaphores do not seem available yet
1029 - #294: Alltoall collective implementation of mpich
1030 - #295: Starting a Host as OFF is not supported
1031 - #296: DTD too permissive
1032 - #299: Add a s4u barrier example
1034 ----------------------------------------------------------------------------
1036 SimGrid (3.20) Released June 24. 2018
1038 The proxy snake_case() release.
1041 - The whole API is now using snake_case() instead of mixing it with camelCase.
1042 Compatibility wrappers in place for one year.
1043 - We took the opportunity to increase the consistency of the API.
1044 Please report any remaining glitches.
1045 - New function simgrid::s4u::Host::get_actor_count:
1046 Returns the number of actors running on a specific host.
1049 - SMPI is now tested with ~45 proxy apps from various sources, with none or
1050 only minor patching needed: check https://github.com/simgrid/SMPI-proxy-apps
1051 - Replay: The replay file has been re-written in C++.
1052 - Replay: Tags used for messages sent via MPI_Send / MPI_Recv are now
1053 supported. They are stored in the trace and used when replayed.
1054 - Basic support of MPI_Cancel. Robustness not guaranteed.
1055 - Support of MPI_Win_allocate_shared, MPI_Win_shared_query, MPI_Comm_split_type
1056 (only for MPI_COMM_TYPE_SHARED).
1057 - New option: smpi/privatize-libs, to add external shared libs to be privatized
1058 by SMPI. They will be copied locally and loaded separately by each process.
1059 Example --cfg=smpi/privatize-libs:"libgfortran.so.3;libscalapack.so".
1060 - Tracing: add tracing for MPI_Start, Startall, Testall, Testany
1061 - Interception of getopt, getopt_long and getopt_long_only calls to avoid issues
1062 with internal index optind with multiple processes. Only works if MPI_Init has
1063 already been called.
1064 - Fortran: SMPI builds a mpi.mod file which should allow use of "use mpi"
1065 syntax without preprocessing tricks.
1068 - Change --cfg=tracing/msg/vm to --cfg=tracing/vm as virtual machine
1069 behavior tracing is no longer limited to MSG
1070 - TIT (Time Independent Traces): We finally support tags. Unfortunately,
1071 this means that traces now need to be updated or re-obtained; both Irecv
1072 and Isend lines in your traces have now in total 5 mandatory fields:
1073 <rankid> <command> <to/from rankid> <tag> <size>
1074 To update your traces, it suffices to add a 0 for the tag here.
1075 - TIT now also supports waiting for a distinct request via MPI_Wait.
1076 Wait/Test now wait for a specific request, not just the last one that was
1077 issued. This unfortunately means another update, because we need to
1078 identify which request you want to wait for. We do this via the
1079 triplet (sender, receiver, tag), which needs to be added:
1080 <rankid> <command> <sender> <receiver> <tag>
1081 - Actions are now in lower case (e.g., "allReduce" becomes "allreduce").
1082 New script simgrid_convert_TI_traces.py: upgrade your TI traces.
1085 - The deprecation of MSG is ongoing (but this should not impact you).
1086 Many MSG functions are now simple wrappers on the C API of S4U. If
1087 you wish to convert your code to S4U, find the S4U counterparts of
1088 your MSG calls in src/msg/msg_legacy.cpp.
1089 - MSG can still be used, but won't evolve anymore.
1092 - Allow to run the Link energy plugin from the command line with
1093 --cfg=plugin:link_energy
1094 - Rename Energy plugin into host_energy
1095 - Rename Load plugin into host_load
1098 - Add parameter --cfg=simix/breakpoint to raise a SIGTRAP at given time.
1099 - kill simix::onDeadlock() that was somewhat dupplicating s4u::on_deadlock()
1100 - Improve performance when handling timeouts of simix synchros.
1103 - Config: the C API is now deprecated (will be removed in 3.23), and
1104 the C++ API has been slightly improved.
1107 - Fix several build issues on OSX.
1108 - Move simgrid_config.h to simgrid/config.h (old header still working)
1111 - #143: Setting a breakpoint at a given time
1112 - #150: Inconsistent event names in SMPI replay
1113 - #258: daemonized actors hang after all non-daemonized actors have completed
1114 - #267: Linker error on unit_tmgr
1115 - #269: SMPI: tracing of MPI_Wait/all/any broken
1116 - SMPI: Fix various crashes with combined use of MPI_PROC_NULL and MPI_IGNORE_STATUS
1118 ----------------------------------------------------------------------------
1120 SimGrid (3.19.1) Released March 22 2018
1122 The Fixed ABI Release.
1124 As you may know, we are currently refactoring SimGrid in deep.
1125 Upcoming SimGrid4 will be really different from SimGrid3: modular,
1126 standard and extensible vs. layered, homegrown and rigid. C++ vs. C.
1128 Our goal is to smooth this transition, with backward compatibility
1129 and automatic update paths, while still progressing toward SimGrid4.
1131 SimGrid remains open during works: The last pure SimGrid3 release was
1132 v3.12 while all subsequent versions are usable alpha versions of
1133 SimGrid4: Existing interfaces remain unchanged, but the new S4U
1134 interface is budding and the internals are deeply reorganized.
1136 Since 2015, we work hard to reduce the changes to public APIs. When
1137 we need to rename a public library symbol in S4U, we let your
1138 compiler issue an explicative warning when you use the deprecated
1139 function. These messages remain for four releases, i.e. for one full
1140 year, before turning into an error. Starting with v3.15, your can
1141 also adapt to API changes with the SIMGRID_VERSION macro, that is
1142 defined to 31500 for v3.15, to 31901 for v3.19.1 and so on.
1144 Starting with this v3.19.1, our commitment to reduce the changes to
1145 the public interfaces is extended from the API to the ABI: a program
1146 using only MSG or SimDag and compiled against a given version of
1147 simgrid can probably be used with a later version of SimGrid without
1148 recompilation. We will do our best... but don't expect too much of
1149 it, that's a really difficult goal during such profund refactoring.
1151 The difference between v3.19 and v3.19.1 is that the former was
1152 accidentally breaking the ABI of MSG, while the later is restoring
1155 S4U and kernel APIs will still evolve until SimGrid4, with one-year
1156 deprecation warnings as currently. In fact, cleaning up these
1157 interfaces and converting them to snake_case() is one release goal of
1158 v3.20. But don't worry, we are working to smooth this upgrade path.
1160 In summary, new projects should start with S4U to benefit of the
1161 future, but old MSG projects should still be usable with no change.
1163 ----------------------------------------------------------------------------
1165 SimGrid (3.19) Released March 20 2018
1167 The Moscovitly-cold Spring release.
1169 SMPI user-visible improvements:
1170 - Support of MPI_Type_create_subarray
1171 - Unimplemented MPI calls now abort (instead of issuing a warning)
1172 Some harmless calls around errhandlers still only issue a warning.
1173 - MPI_Sendrecv was behaving badly when MPI_PROC_NULL was sender or receiver.
1174 - Starting MPI ranks (or even MSG/S4U actors) once the simulation started
1175 is now possible (mmap privatization was refactored to this end).
1176 Adding new SMPI instances should also be technically doable now.
1178 SMPI internal cleanups:
1179 - Removed index notion from SMPI -- no more "getPid() - 1"!
1180 In tracing files, actors are called rank-<PROCESS-ID> but these are
1181 NOT the real ranks (tracing several communicators is not supported yet).
1182 - Deprecate smpi_process_index() (will be removed in 3.22)
1183 - Better testing on classical proxy apps, through an external project:
1184 https://github.com/simgrid/SMPI-proxy-apps/
1187 - Use a graphical TOC to make it easier to find the documentation you need
1188 - Revamp the MSG tutorial
1191 - Fix MSG_task_get_remaining_work_ratio(): return 1.0 for unstarted tasks.
1192 - Remove parameter of MSG_process_killall().
1193 Resetting the PID was bogus anyway (several actors could have the same PID).
1196 - Execution->setHost() can be called after start(), to migrate it.
1197 - Comm::test_any() is now implemented.
1198 - s4u::Actor now has onCreation() and onDestruction() signals.
1199 - Install some kernel header files for the users' plugins and more.
1200 Warning, their API is really not stable yet.
1201 include/simgrid/kernel/resource/{Action,Resource,Model}.hpp
1202 include/simgrid/kernel/routing/*Zone.hpp
1205 - SD_task_dependency_add(): remove unused parameters 'name' and 'data'.
1207 Build System and other cleanups:
1208 - Remove unused run-time parameter "tracing/onelink-only".
1209 - SimGrid now works with intel compilers (MC still buggy)
1210 - Remove XBT_LOG_CONNECT, it should be useless nowadays.
1211 - tesh kills subprocesses on timeout (but not on windows)
1214 - Rename FULLDUPLEX into SPLITDUPLEX (old name still accepted)
1217 - #194: Feature request: simgrid::s4u::Comm::test_any()
1218 - #245: migrating an actor does not migrate its execution
1219 - #253: Feature Request: expose clusters as objects
1220 - #254: Something seems wrong with s4u::Actor::kill(aid_t)
1221 - #255: Tesh broken on Windows
1222 - #256: Modernize FindSimGrid.cmake
1223 - #257: Fix (ab)use of CMake install
1225 ----------------------------------------------------------------------------
1227 SimGrid (3.18) Released December 24 2017
1229 The "Ho Ho Ho! SimGrid 4 beta is coming to town" release.
1231 MSG IS NOW DEPRECATED. Please use S4U for new projects.
1232 - Support for MSG should not be removed from SimGrid before 2020,
1233 but future evolutions will be limited to the integration of
1234 user-provided patches.
1237 - s4u::onDeadlock() signal, run before stopping the simulation.
1238 - s4u::Exec: asynchronous executions (abstraction of background
1240 - s4u::Host->getLoad() returns the achieved speed in flops/s
1243 - Link::name() is deprecated and will be removed in v3.21, use
1244 Link::getCname() instead.
1245 - Mailbox::getName() changed to return a std::string, use
1246 Mailbox::getCname() instead to get a char*.
1247 - Storage::getName() changed to return a std::string, use
1248 Storage::getCname() instead to get a char*.
1249 - s4u::allStorages() becomes s4u::getStorageList(whereTo)
1250 to have both allocation and deallocation of the map in user space.
1253 - Forbid the use of MSG_task_get_flops_amount() on parallel tasks:
1254 The amount of flops remaining to do is a vector, not a scalar.
1255 - Introduce MSG_task_get_remaining_work_ratio(), which does what its
1256 name implies on both sequential and parallel tasks.
1257 - Both changes fix GitHub's #223 using PR #237 as a basis.
1258 Thanks Michael Mercier.
1259 - Most examples were converted to S4U and hidden elsewhere at tests.
1260 Rationale: we still want MSG to work; we want newcomers to use S4U.
1263 - LMM stuff moved to its own namespace: simgrid::kernel::lmm.
1264 - Renamed LMM classes (e.g. s_lmm_system_t -> System).
1267 - Switch to the faster dlopen privatization mechanism by default
1268 - Documentation improvments
1271 - Live migration is getting moved to a plugin. Dirty page tracking is
1272 the first part of this plugin. This imply that VM migration is now
1273 only possible if one this function is called:
1274 - C/MSG: MSG_vm_live_migration_plugin_init()
1275 - C/C++: sg_vm_live_migration_plugin_init()
1276 - Java: Msg.liveMigrationInit()
1277 For C and C++, "simgrid/plugins/live_migration.h" also has to be
1281 - Define class simgrid::xbt::Path to manage file names.
1282 - Removed unused functions:
1283 - xbt/file.h: xbt_basename(), xbt_dirname(), xbt_getline()
1284 - xbt/graph.h: xbt_graph_edge_get_length(), xbt_graph_edge_set_length,
1285 xbt_graph_export_graphviz()
1286 - xbt/str.h: xbt_str_join()
1287 - Remove unused datatypes:
1288 - xbt/heap.h: use std::priority_queue or boost::heap instead
1289 - xbt/swag.h: use boost::intrusive::list instead
1292 - New link_energy plugin for the consumption of the links.
1293 - All of the operations on files and storage contents have been
1294 packaged into a plugin (src/plugins/file_system). The current
1295 public interface can be found in
1296 include/simgrid/plugins/file_system.h
1297 To use these functions you now have to initialize the plugin by
1298 calling MSG_storage_file_system_init() just after calling
1299 MSG_init() or sg_storage_file_system_init() just after creating
1303 - Remove the undocumented/untested tag <include>
1306 - Remove viva specific tracing as the tool is no longer maintained
1309 - #248: Kill of finished processes leads to segfault
1310 - #240: xbt_cond_wait_timeout should gracefully return for C apps
1311 - #239: please implement signal s4u::onDeadlock()
1312 - #230: segfaults when exit() without run()
1313 - #225: s4u::Actor::kill() doesn not really kill victims in a join()
1314 - #223: MSG_task_get_flops_amount() not working with parallel tasks
1315 - #222: Actor::kill() doesn't really kill and segfaults
1316 - #221: odd LMM warning when killing an actor
1317 - #120: Memory leak when the processes are forcefully killed
1319 ----------------------------------------------------------------------------
1321 SimGrid (3.17) Released October 8 2017
1323 The Drained Leaks release: (almost) no known leaks despite the tests.
1325 Even very long simulations will preserve your memory: our testsuite
1326 stresses SimGrid for over 45mn on fast machines for a coverage of
1327 over 80%, and there is only one single known leak, of about 4kb.
1331 - Comm.detach(): start and forget about asynchronous emission. A cleanup
1332 handler may be given to free resources if the comm cannot be completed.
1333 - this_actor::send(mailbox) is now mailbox->put()
1334 - New: simgrid::s4u::Comm::wait_all()
1335 - New: Host.execute() for remote executions.
1338 - Unused option network/sender-gap is removed.
1341 - Deprecate MSG_task_isend_with_matching(): This unused feature
1342 really complicates our internals. Will be removed in v3.20.
1345 - Improved context termination. It is now possible to free resources, even
1346 when a process is forcibly killed.
1347 - ContextBoost: add support for Boost versions above 1.61.
1350 - Bring back run-time option --cfg=exception/cutpath to remove exception
1352 - Removed unused functions:
1353 - xbt/str.h: xbt_str_split_str(), xbt_str_subst(), xbt_str_ltrim(),
1354 xbt_str_rtrim(), xbt_str_trim().
1355 - xbt/xbt_os_thread.h: xbt_os_thread_cancel(), xbt_os_thread_detach().
1358 - Removed header files obsolete since SimGrid 3.12:
1359 msg/datatypes.h, msg/msg.h, simdag/datatypes.h, simdag/simdag.h.
1361 - #3: SD_exit should be made optional
1362 - #120: Memory leak when the processes are forcefully killed
1363 - #159: Threading test regression in Actor refcounting
1364 - #170: simgrid::s4u::Comm::wait_any() returns too many comms
1365 - #185: simgrid::s4u::Engine::instance()->shutdown() segfaults
1366 - #186: Actor::killAll() segfaults if some process is blocked on wait()
1367 - #191: VM migration and pstate
1368 - #192: Updating the energy consumptions of all hosts crashes with VMs
1369 - #195: All actors have PID=0 in the logs
1370 - #204: Sometimes segfault with thread contexts and mmap privatization
1371 - #222: Actor::kill() doesn't really kill and segfaults
1372 - #225: Actor::kill() doesn't really kill when victims are doing a join()
1374 ----------------------------------------------------------------------------
1376 SimGrid (3.16) Released June 22. 2017.
1378 The Blooming Spring Release: developments are budding.
1381 - FreeBSD: Disable SMPI mmap privatization, switch automatically to dlopen.
1382 - Mac, BSD: dlopen+thread broken, switch automatically to raw contexts.
1383 - Java JAR file should be finally fully working on Mac OSX too.
1385 XML platforms: Switch to platform v4.1 format.
1386 * This is (mainly) a backward compatible change: v4 are valid v4.1 files
1387 - <zone> can be used as a synonym for the now deprecated <as>
1388 - <zoneRoute> can be used as a synonym for the now deprecated <asroute>
1389 - <bypassZoneRoute> can be used as a synonym for the now deprecated <bypassAsRoute>
1390 - <actor> can be used as a synonym for the now deprecated <process>
1391 - state_file and avail_file periodicity is now easier to express
1392 (check the documentation) the old behavior should still work.
1393 * Storage: not backward compatible, but it seems that nobody ever used it
1394 - Remove attribute 'content_type' of <storage_type>: was never used
1395 - Make attribute 'model' of <storage_type> optional: for future usage
1396 - Remove Bconnection model property: was never (in)validated. Replaced by
1397 the maximum of the read and write bandwidth as a resource constraint.
1400 - New and Backwards Compatibility break:
1401 SD_simulate_with_update (double how_long, xbt_dynar_t changed_tasks_dynar)
1402 When one wants to get the list of tasks whose states have changed during a
1403 simulation round, s/he has to allocate and free a dynar and use it as
1404 argument to this function. The former SD_simulate (double how_long)
1408 - Allow multicore VMs, with the correct sharing (unless you overcommit)
1409 BUG: vCPU overcommitting still leads to buggy sharing, though. WIP.
1412 - New function to update the consumption of all hosts at once.
1413 - Fix the model for multi-core hosts, linear in the amount of busy
1414 cores with an abnormality for pIdle (see paper).
1415 BUG: Still not satisfactory for ptask on mono-cores.
1418 - The netzone are now available from the MSG API.
1419 The old names still work, but are now deprecated.
1422 - New algorithm to privatize globals: dlopen, with dynamic loading tricks
1423 - New option: smpi/keep-temps to not cleanup temp files
1424 - New option: smpi/shared-malloc-blocksize . Relevant only when global shared
1425 mallocs mode is used, allows to change the size of the fake file used
1426 (default 1MB), to potentially limit the number of mappings for large runs.
1427 - Support for sparse privatized malloc with SMPI_PARTIAL_SHARED_MALLOC()
1428 - Fortran ifort and flang compilers support
1429 - New RMA calls supported (experimental):
1430 - MPI_Win_allocate, MPI_Win_create_dynamic, MPI_Win_attach
1431 - MPI_Win_detach, MPI_Win_set_info, MPI_Win_get_info
1432 - MPI_Win_lock_all, MPI_Win_unlock_all, MPI_Win_flush
1433 - MPI_Win_flush_local, MPI_Win_flush_all, MPI_Win_flush_local_all
1434 - MPI_Op_commutative, MPI_Fetch_and_Op, MPI_Compare_and_swap
1435 - MPI_Rput, MPI_Rget, MPI_Raccumulate, MPI_Rget_accumulate
1438 - New: this_actor::isMaestro() returns whether we are in kernel mode.
1439 - Behind the scene, ActivityImpl are now automatically refcounted.
1440 Removing this nasty bottleneck will greatly simplify our internals.
1443 - Replay: New function xbt_replay_action_get():
1444 Retrieve the function previously associated to an event type.
1445 - DROPPED FUNCTION: xbt_str_varsubst()
1446 - DROPPED MODULE: strbuff. We don't need it anymore.
1447 - DROPPED MODULE: matrix. We don't need it anymore.
1448 - DROPPED MODULE: lib. We don't need it anymore.
1450 -- Thu Jun 22 22:48:12 CEST 2017 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1452 SimGrid (3.15) Released March 22. 2017
1454 The Spring Release: continuous integration servers become green
1455 We fixed even the transient bugs on all target architectures:
1456 Linux (CentOS, Debian, Ubuntu, Fedora), Mac OSX (Mavericks, El Capitan)
1457 Windows, FreeBSD, NetBSD.
1459 - Rename NetCards to NetPoints.
1460 This was intended to help NS3 users, but that's not a netcard.
1461 That's a point in the routing algorithm, let's avoid wrong simplifications.
1464 - New: MSG_process_yield(). Stop and yield to other processes.
1465 - New: MSG_process_daemon(). Daemon processes are automatically killed
1466 when the last non-daemon process terminates
1467 - New: MSG_process_ref/unref(). Fiddle with the process refcounting.
1468 - Renamed MSG_energy_plugin_init() -> MSG_host_energy_plugin_init()
1469 to make room for the upcoming network energy plugin.
1470 - Drop MSG_host_get_current_power_peak: duplicates MSG_host_get_speed
1473 - Ensure that an actor can kill itself with Process::exit()
1474 - Kill the obscure NativeException. Nobody want to survive the issues
1475 it denotes, so use JniException that is a RuntimeException (not to
1476 be caught explicitly).
1477 - Partial bug fix in initialization. SimGrid flags on command line were
1478 consumed at C level but stayed in the original Java String[] args.
1479 This could mess users' args[i] if SG flags were not put at the end of
1481 The SimGrid flags are now removed from the Java arguments. However,
1482 the number of arguments REMAINS UNCHANGED. It is then UNSAFE to test
1483 if args.length is greater than the number of YOUR OWN ARGUMENTS.
1484 It might be if you have --log or --cfg flags in the command line.
1485 - Fix numerous memleaks all around the place. In particular, around VMs.
1489 - s4u::onPlatformCreated: right before the simulation starts
1490 - s4u::onSimulationEnd: right after the main simulation loop
1491 - s4u::onTimeAdvance: right after a clock change (time is discrete)
1492 - s4u::Host::onSpeedChange: when the pstate is changed, or when an
1493 event from the availability_file changes the avail speed.
1494 - Links are now usable from s4u
1495 - New: Engine::hostList() and Engine::hostCount(). Still clumsy.
1496 - New: Actor::suspend(), Actor::resume(), and Actor::migrate(new_host)
1497 - New examples: The conversion of MSG examples to S4U has begun
1498 - Actors: create, kill, migration, and suspend
1499 - Applications: master-worker and token-ring
1500 - Action replay: communications and storage
1501 - Drop Host::getPstateSpeedCurrent() which duplicates Host::speed()
1504 - Backwards Compatibility breaks
1505 - The SD_route_get_list and SD_route_get_size functions have been removed.
1506 They are replaced by the unique
1507 void sg_host_route(sg_host_t src, sg_host_t dst, xbt_dynar_t links)
1508 The route from src to dst is built in the links dynar whose size can
1509 be obtained with xbt_dynar_length.
1510 - The SD_route_bandwidth and SD_route_latency functions have been replaced by
1511 sg_host_route_bandwidth and sg_host_route_latency.
1512 Macros ensure the backwards compatibility, but you should fix your code
1515 - Major C++ rewrite ongoing (SMPI used to be C compiled in C++).
1516 This can break codes using SMPI internals (from private.h instead of the public smpi.h).
1517 - Bump our claim of support from MPI 1.1 to MPI 2.2.
1518 We don't support 100% of it, but it should be enough. Contact us if not.
1519 - MPI_Win_lock/unlock, MPI_Get_accumulate support added (as for all RMA, implementation is
1520 naive and probably inaccurate)
1521 - New algorithm for SMPI_SHARED_MALLOC: global, where all blocks are
1522 mapped onto a unique small file using some system magic.
1523 - Bugfix: smpirun was sometimes misusing hostfile when wrongly terminated
1524 - Fortran: cleanups, fixes, support of user-added operations
1525 - RMA: MPI_Accumulate are applied in correct order.
1526 - RMA: MPI_Win_{complete/post} shouldn't miss messages anymore.
1527 - Better support for MPI_IN_PLACE
1528 - Support for MPI_Win attrs and keyvals.
1529 - Support MPI_Comm_group_create, MPI_Type_size_x
1530 - MPI ops should be properly applied to all allowed types
1531 - Replace implementation of MPI_Bcast "scatter followed by rdb allgather"
1532 algorithm by a non failing one from mpich.
1535 - Kill the fifo data container: we don't use it anymore.
1538 - A <cluster> can now be created with different speed values to represent pstates.
1539 see examples/platforms/energy_cluster.xml for an example.
1541 SimGrid (3.14.159) Released December 28. 2016
1543 The previous release was only a crude approximation of a Pi release;
1544 this one should be a bit better.
1546 - Revert a last minute change that broke on Mac OSX.
1547 - Fix the changelog and NEWS files.
1548 - Improve the documentation, in particular of the routing module.
1549 - Integrate some patches flying around in Debian.
1551 SimGrid (3.14) Released December 24. 2016
1554 * The whole documentation was reworked and reorganized. There is
1555 still much room for improvement here, but we're on it.
1558 * We now need python3 for our testing infrastructure.
1559 * Model checking needs libevent
1562 * Now works on FreeBSD
1565 * Privatization now works on FreeBSD
1567 * Privatization is now activated by default in smpirun
1568 You can turn it off with -no-privatize if something goes wrong.
1570 * Call-location tracing for SMPI.
1571 You can add the exact location (filename / linenumber) of an MPI call to
1572 your trace files and slow down or speed up the simulation between two
1573 consecutive calls by using an adjustment file (see the documentation).
1575 * Fixed computation of timings for MPI_Send, MPI_Recv & possibly also others
1576 We've found a bug that prevented SMPI to account for MPI_Send, MPI_Recv
1577 and others (in some cases) in a correct way. That is, the smpi/os, smpi/or
1578 values were ignored in some cases. The timings of these functions can now
1579 be significantly different.
1581 * smpi/cpu-threshold:-1 should become smpi/simulate-computation:no
1582 smpi/running-power is renamed to smpi/host-speed
1584 * smpi/grow-injected-times option to enable or disable multiplication of the
1585 timings injected in MPI_Iprobe, or MPI_Test. Enabled by default, which can
1586 make simulation less precise (but also much faster).
1588 * smpirun script should be (much) faster for large deployments.
1590 * SMPI tracing: fixed issue with poor matching of send/receives.
1592 * Replay: Fix broken waitall
1594 New functions and features
1595 * MSG_parallel_task_execute_with_timeout, to timeout computations.
1597 Dropped / renamed functions and features
1598 * msg_mailbox_t and associated functions. Use s4u::Mailbox instead.
1599 - MSG_mailbox_is_empty() -> Mailbox::empty()
1600 - MSG_mailbox_front() -> Mailbox::front()
1601 - MSG_mailbox_get_by_alias() -> simgrid::s4u::Mailbox::byName(name)
1602 - MSG_mailbox_get_task_ext() -> MSG_task_receive_ext()
1603 - MSG_mailbox_get_task_ext_bounded -> MSG_task_receive_ext_bounded
1604 - MSG_host_(get/set)_params -> MSG_vm_(get/set)_params
1605 * Don't pass the free_f parameter to property related functions:
1606 - MSG_host_set_property_value()
1607 - MSG_as_router_set_property_value()
1608 - MSG_storage_set_property_value()
1609 * VM properties. Since msg_vm_t are msg_host_t, just use
1610 MSG_host_get_property_value() and friends
1611 * VM I/O related things:
1612 - Ignored parameter of vm_create: core_nb, disk_path and disk_size.
1613 - Unimplemented save/restore methods
1614 * MSG_as_router_get_property_value() was redundant with
1615 MSG_environment_as_get_property_value().
1616 - Removed MSG_as_router_*propert*() functions
1617 - Added MSG_environment_as_set_property_value() for consistency
1618 * xbt heterogeneous dictionaries (created with xbt_dict_new()).
1619 Well, they are still there for now, but deprecated with a warning.
1620 Please switch to xbt_dict_new_homogeneous() before this is removed
1622 * Task affinity. Its intended behavior (that was very badly tested
1623 and probably not really working) was deceiving what most users
1624 would have hoped here.
1625 * xbt_os_sem_get_value: unused internally, deprecated on OS X El Capitan
1626 * Option network/coordinates is now useless and should be dropped.
1629 * Added option storage/max_file_descriptors to allow more than 1024 files opened
1632 * Added option maxmin/concurrency_limit to allow more than 100 processes per host
1633 * Added Dragonfly topology support
1636 * Add Exa- and Peta- units such as EiB, EB, Eib, Eb for size, and
1637 EiBps, EBps, Eibps, Ebps for bandwidth.
1638 They may become useful to some lucky ones.
1641 * New functions: msg.Comm.waitAll() and msg.Comm.waitAny()
1642 * ex/app_tokenring: new example, very similar to the MSG Token Ring
1643 * ex/async_waitAll: new example, on asynchronous communications
1646 * Memory usage should be decreased for simulations with a large number
1647 of processes. This also helps for SMPI.
1649 SimGrid (3.13) stable; urgency=low
1651 The Half Release, a.k.a. the Zealous Easter Trim.
1653 - We removed half of the lines, that were mostly experimental cruft.
1654 v3.12 lasted 286000 lines of code, v3.13 is only 142000 lines
1655 (not counting blanks and comments -- according to openhub.net)
1656 - The internals are now compiled in C++ (and will soon be clean C++)
1657 - We removed 75 klines of XML, 12 klines of Java, 5 klines of cmake,
1658 59 klines of C, etc. We added only 29 klines of C++ in replacement.
1660 * Backwards Compatibility breaks
1661 - Removed Lua simulation bindings (switch to C or Java for that).
1662 Lua can still be used to describe platforms
1663 - Removed Java kernel plug-ins.
1664 Will be reintroduced after the ongoing major internals reorg.
1666 - the following functions were removed.
1667 They were too specific and should be reimplemented in a generic
1668 way, with filter function.
1669 - MSG_task_listen_from_host
1670 - MSG_mailbox_get_count_host_waiting_tasks
1671 - MSG_mailbox_put_with_timeout was removed.
1672 Please use MSG_task_send_with_timeout instead.
1674 - the SD_application_reinit function was removed. It has been a noop for a while.
1675 - The ACCESS_MODE of SD_workstation has been removed. This feature was not really usable and should soon be
1676 replaced by a more flexible mechanism.
1677 - The following functions thus do not exist anymore
1678 - SD_workstation_get_access_mode
1679 - SD_workstation_set_access_mode
1680 - SD_workstation_get_current_task
1681 - Basic estimation functions have been removed but can easily be replaced
1682 - SD_route_get_communication_time => SG_route_get_latency() + amount / SD_route_get_bandwidth()
1683 - SD_workstation_get_computation_time => amount / sg_host_speed()
1685 - VM.setBound(int load) is now VM.setBound(double bound) to meet the MSG semantics.
1686 Use VM.getSpeed()*load/100 for the legacy behavior.
1688 - option enable_tracing was removed. It was not doing anything for a while.
1689 - In the ModelChecker:
1690 - the model-checker now ptraces the model-checked process which means
1691 you cannot use a debugger on the latter anymore (we might make this
1692 optional in the feature);
1693 - removed soft-dirty page tracking;
1694 - remove model-checked side snapshot management,
1695 MC_snapshot() and MC_compare_snapshot();
1696 - keep the MC_cut() function as a stub (it was not really working
1697 in the previous release).
1700 * All options are consistently in kebab-case. Old names are kept as alias.
1703 * Switch to platform v4 format.
1704 - Rename from 'power' to 'speed' the attributes describing the amount of
1705 flops that a <host>, <peer>, <cluster> or <cabinet> can deliver per second.
1706 - In <trace_connect>, attribute kind="POWER" is now kind="SPEED".
1707 - In <host> and <link>, attributes availability and state are gone.
1708 It was redundant with state and availability traces, and with peak values.
1709 - In <cluster>, attributes availability_file and state_file are gone.
1710 It was too complex and unused.
1711 - Kill <gpu>. Was not doing anything.
1712 - The DOCTYPE points to the right URL:
1713 http://simgrid.gforge.inria.fr/simgrid/simgrid.dtd
1714 (the file at this address now documents the changelog since its v1)
1715 - A warning is emitted for unit-less values (they are still accepted).
1716 - speed. Default: 'f' or 'flops'. Also defined:
1717 'Yf', 'Zf', 'Ef', 'Pf', 'Tf', 'Gf', 'Mf', 'kf'
1718 'yottaflops', 'zettaflops', 'exaflops', 'petaflops', 'teraflops', 'gigaflops', 'megaflops', 'kiloflops'
1719 - bandwidth. Default: 'Bps' bytes per second (or 'bps' for bits but 1 Bps = 8 bps)
1720 Also defined in bytes: 'TiBps', 'GiBps', 'MiBps', 'KiBps', 'TBps', 'GBps', 'MBps', 'kBps', 'Bps'
1721 And the same in bits: 'Tibps', 'Gibps', 'Mibps', 'Kibps', 'Tbps', 'Gbps', 'Mbps', 'kbps', 'bps'
1722 - latency. Default: 's' second. Also defined:
1723 'w' week, 'd' day, 'h' hour, 'm' minute, 'ms' millisecond, 'us' microsecond, 'ns' nanosecond, 'ps' picosecond
1725 * bin/simgrid_update_xml can upgrade your files automatically (won't convert unit-less values)
1726 tools/sg_xml_unit_converter.py may help (but it's just a warning and will probably ever be).
1729 * s4u::Host is now the preferred public interface to the Host features.
1730 sg_host_* functions are C bindings to the exact same behavior
1731 MSG_host_* and SD_workstation_* are #define to the sg_host_* ones
1734 * The examples were completely reorganized (in C and Java), for your browsing pleasure.
1735 * Kill all deprecated functions (the ones you had when declaring MSG_DEPRECATED).
1736 They were deprecated since a few years, and probably did not even compile anymore.
1739 * The API has been profoundly modified to directly use the core objects instead of redefining its own.
1740 SD_Workstation_t and SD_link_t are now sg_host_t and sg_link_t respectively.
1741 Some functions have also been renamed for consistency. Backward compatibility is maintained, but users are
1742 encouraged to update their codes. A list of the modified functions can be found at the end of
1743 include/simgrid/simdag.h
1746 * simgrid::simix::kernelImmediate() is the closure callback. It ensures that
1747 the lambda or closure passed as a parameter will run in kernel mode.
1748 All the callback functions should be rewritten to that interface at some point.
1751 * Reorganizing and cleaning the internals all around the place.
1754 * Remove old default barrier/bcast buggy algorithms (see #18407)
1755 * Various bug fixes to handle more codes
1756 * Remove the need for the --foreground option of smpirun (it is still
1757 accepted for backward compatibility).
1760 * Kill the setset data container: MC don't use it anymore.
1761 * Kill the queue data container: it made more sense with GRAS.
1762 * Kill the xbt_peer_t data type: it's useless without GRAS.
1763 * Kill rm_cb feature of config sets: it was never useful.
1764 * Kill graphxml parsing feature. It was not used.
1765 * Kill the deprecated code protected by XBT_USE_DEPRECATED
1767 - xbt_dynar_sort_strings(), when the content is char*
1768 - xbt_str_parse_int / xbt_str_parse_double, wrapping strtol/strtod
1769 They throw exceptions on invalid input;
1770 * C++ support for declaring CLI flags (simgrid::config::Flag);
1771 * class for abstracting different signal backends (simgrid::xbt::signal).
1772 with no external dependencies (we need very simple signals).
1775 * refactoring and cleanup of the code;
1776 * ongoing process to cleanly separate the model-checking algorithms
1777 from the code model-checking support.
1779 -- Wed Apr 27 21:00:53 CEST 2016 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1781 SimGrid (3.12) stable; urgency=low
1783 The Facelift Release.
1786 * Require g++ v4.7 at least to not speak prehistorical C++.
1787 * Require Boost 1.48 (for signal2 component).
1788 * Java must be version 7 at least when activated.
1789 * Builds on Windows again (including Java bindings).
1790 * Tracing is now always enabled (no way to turn it out)
1791 * Remove GTNetS. It was not working anyway.
1792 * Various cleanups in the cmake scripts.
1793 * Move headers around to sort them out on installed systems:
1794 - instr/instr.h -> simgrid/instr.h
1795 - instr/jedule/* -> simgrid/jedule
1796 - simdag/datatypes.h was removed
1797 - simdag/simdag.h -> simgrid/simdag.h
1798 - msg/datatypes.h was removed
1799 - msg/msg.h -> simgrid/msg.h
1802 * Interface improvement:
1803 - Rename MSG_host_is_avail(h) to MSG_host_is_on(h)
1804 - Sanitize the interface in MSG_task_ module:
1805 - Merge two functions that were close enough but misleading:
1806 set_compute_duration(t) -> set_flops_amount(t)
1807 get_remaining_computation(t) -> get_flops_amount(t)
1808 - set_data_size(t) -> set_bytes_amount(t)
1809 get_data_size(t) -> get_bytes_amount(t)
1810 - Massive cleanups in the functions related to the energy
1811 - MSG_host_get_pstate_number() -> MSG_host_get_nb_pstates()
1812 - New: MSG_host_get_pstate()
1814 - msg/energy/onoff: switching hosts on and off
1816 * Interface improvement:
1817 - Rename Host.isAvail() to Host.isOn()
1818 - Rename Process.currentProcess() to Process.getCurrentProcess()
1819 - Rename Task.setDataSize() to Task.setBytesAmount()
1820 - Merge Task.getRemainingDuration() and Task.getComputeDuration() into Task.getFlopsAmount()
1822 - #18874: Actually allows the GC to reclaim tasks
1826 - SIMIX_process_throw: raises an exception in a remote process
1827 * Refactoring: Separate sub-modules
1828 - libsmx: the public interface, as libc in a real system
1829 - popping: the strange dance that converts a user request into a kernel handling
1830 - smx_context_*: the virtualization mechanisms that embed the user code
1831 - smx_*: the handling of each simcalls
1832 * Interface cleanup:
1833 - simcall_host_set_power_peak_at -> simcall_host_set_pstate
1834 * Rename smx_action_t into smx_synchro_t, making explicit that these
1835 things are used to synchronize processes with their environment.
1836 For example, a communication is a sort of synchronization involving
1837 the communicating processes (that may block until the exchange) and
1838 the platform. The same can be said from computations, etc.
1840 - #18888: segfault when a process ends before its kill_time
1844 - 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.
1845 - MPI_Keyval*, MPI_Attr* functions, as well as MPI_Comm_attr*, MPI_Type_attr* variants (C only, no Fortran support yet)
1846 - MPI_Type_set_name, MPI_Type_get_name
1847 - MPI_*_c2f and MPI_*_f2c functions
1848 - MPI_Info_* functions (beware, get_nthkey may not follow the insertion order)
1849 - MPI_Pack, MPI_Unpack and MPI_Pack_size functions
1850 - Activate a lot of new tests from the mpich 3 testsuite
1852 - Constant times can be injected inside MPI_Wtime and MPI_Test through options smpi/wtime and smpi/test
1853 - InfiniBand network model added: Based on the works of Jerome Vienne
1854 http://mescal.imag.fr/membres/jean-marc.vincent/index.html/PhD/Vienne.pdf
1855 - When smpi/display_timing is set, also display global simulation time and application times
1856 - Have smpirun, smpicc and friends display the simgrid git hash version on --git-version
1857 * Collective communications
1858 - 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
1859 - 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/).
1860 - Support for Rabenseifner Reduce/Allreduce algorithms (https://fs.hlrs.de/projects/par/mpi//myreduce.html)
1862 - Replay now uses algorithms from wanted collective selector
1863 - Replay can be used with SMP-aware algorithms
1864 - Memory occupation of replay should now be contained (temporary buffers allocated in collective algorithms should be shared between processes)
1865 - 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.
1867 - [#17799]: have mpi_group_range_incl and mpi_group_range_excl better test some corner cases
1868 - Correctly use loopback on fat-tree clusters
1869 - Asynchronous small messages shouldn't trigger deadlocks anymore
1870 * Energy/DVFS cleanup and improvement
1871 - smpi_set_host_power_peak_at() -> smpi_set_host_pstate()
1872 - new: smpi_get_host_pstate()
1875 - "Full" network optimization flag was broken since Surf++
1876 - Better handling of precision flags in maxmin
1877 - Fix bug causing sometimes "Impossible" errors
1878 - Properly pass cluster properties to included hosts
1879 * Improvement of the Energy plugin.
1880 - Always update the consumption before returning that value
1881 - New property: watt_off to denote the dissipation when the host is off
1882 - New functions getWattMinAt and getWattMaxAt to retrieve the
1883 dissipation of pstates that we are not currently at.
1884 * Java: class NetworkLink renamed to Link
1885 * New function: simcall_process_get_kill_time()
1886 * Massive rename s/workstation/host/
1887 - That's intrusive, but that's good for the project consistency. Sorry.
1888 - Change config option "workstation/model" into "host/model"
1891 - Add a xbt_heap_update function, to avoid costly xbt_heap_remove+xbt_heap_insert use
1892 - Add a xbt wrapper for simcall_mutex_trylock (asked in [#17878])
1893 - Add two new log appenders: rollfile and splitfile. Patch by Fabien Chaix.
1894 - xbt_dirname and xbt_basename for non-POSIX systems
1896 * The model checker now runs as a separate process.
1897 * The model checker runs must now be launched with the new simgrid-mc program.
1898 * Record/Replay: the MC can display a textual representation of a path in the
1899 execution graph. It can then be replayed outside of the model checker.
1901 -- Mon Oct 12 06:02:41 CEST 2015 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1903 SimGrid (3.11) stable; urgency=low
1908 * Normalizing pointers addresses tool for better diff between logs
1911 * Add cloud examples using new VMs
1912 - examples/msg/cloud/two_tasks_vm.tesh
1913 - examples/msg/cloud/simple_vm.tesh
1914 - examples/java/cloud/cloud.tesh
1915 - examples/java/cloud/migration/migration.tesh
1916 * Add java surf examples:
1917 - examples/java/surfPlugin/surf_plugin.tesh
1918 - examples/java/reservationSurfPlugin/reservation_surf_plugin.tes
1919 - examples/java/surfCpuModel/surf_cpu_model.tesh
1920 * Add SMPI+MSG example:
1921 - examples/smpi/smpi_msg_masterslave/
1926 - msg task destroy cancel test
1927 - msg_host on/off test
1928 * Move all tests in testsuite to teshsuite (adding tesh files)
1929 * Restructure teshsuites
1930 - one folder for each kind of test
1931 * Restructure AddTests.cmake
1933 - structure the order of tests (with sections)
1936 * Add virtual machine
1937 - creation of a VM on a PM
1938 - migration of a VM from a PM to another PM
1940 - MSG_process_join(msg_process_t process, double timeout)
1941 - msg_bar_t MSG_barrier_init(unsigned int count)
1942 - int MSG_barrier_wait(msg_bar_t barrier)
1943 - void MSG_barrier_destroy(msg_bar_t barrier)
1944 - msg_as_t MSG_environment_as_get_by_name(const char * name)
1945 * New option "msg/debug_multiple_use" to help debugging when a task is used
1948 - Improvements and finalization of MSG_storage, MSG_file APIs and their
1950 - Increase code coverage in test suites
1954 * Protect context stacks against stack overflow. The number of protected memory
1955 pages allocated on the top of each stack (1 by default) can be configured
1956 with the new command line option --cfg=contexts/guard_size:<value>.
1957 * Simcalls are now generated by a python script that
1958 - generates files included by SimGrid
1959 - checks that all the functions exist, and proposes prototypes
1961 - remove sem_destroy, file_set_data, comm_destroy, vm_set_state,
1962 host_set_data, host_get_data
1964 - simcall_process_join(smx_process_t process, double timeout)
1965 * Fix bug where sleeping processing could not be suspended.
1968 * Translate surf models from C to C++
1969 - Generic classes for all models: Model, Resource, Action
1970 - A generic interface for each kind of model (CPU, Network, Storage
1971 Workstation, WorkstationVM)
1973 * Translate surf routings from C to C++
1974 * Add callbacks using sigc++ or boost::signals2
1975 - Add callback functions for resource creation/destruction
1976 - Add callback functions for action state change
1977 - Handle Energy as a plugin
1978 * Replace swag by boost::intrusive
1979 * Add new routing models for clusters. For documentation, see
1980 http://simgrid.gforge.inria.fr/simgrid/latest/doc/platform.html#pf_cluster
1981 - tori, with topology="TORUS" and topo_parameters="ndim1,ndim2,...,ndimn"
1982 parameters for cluster tag
1983 - Fat trees, with topology="FAT_TREE" and
1984 topo_parameters="h;m1,...,mh;w1,...,wh;p1,...,ph" parameters for cluster tag
1985 - see examples/platforms/torus_cluster.xml and
1986 examples/platforms/fat_tree_cluster.xml
1987 * More documentation
1990 * Hostfiles support host:nb_processes construct to deploy several processes on
1992 * Collective communication algorithms should not crash if used with
1993 improper number of nodes and report the error.
1994 * SMPI now partially supports MPI_Topologies: MPI_Cart_create, MPI_Cart_shift,
1995 MPI_Cart_rank, MPI_Cart_get, MPI_Cart_coords, MPI_Cartdim_get,
1996 MPI_Dims_create, MPI_Cart_sub are supported.
1997 * New interface to use SMPI programmatically (still depends on MSG for
1998 some parts, see examples/smpi/smpi_msg_masterslave):
1999 - SMPI_app_instance_register(const char *name, xbt_main_func_t code,
2003 * Global variables privatization in MPI executables is now performed at runtime
2004 with the option smpi/privatize_global_variables (default:no).
2005 Limitations: Linux/BSD only, with mmap enabled. Global variables inside
2006 dynamic libraries loaded by the application are not privatized (static
2007 linking with these libraries is advised in this case)
2010 * Options defined in XML work correctly now.
2013 * New cmake option, enable_lib_in_jar, to control whether native libraries are
2014 copied into simgrid.jar or not (ON by default). Use this option if you want
2015 to reduce the size of the installed simgrid.jar, *and* the native libraries
2016 are kept installed elsewhere.
2017 * Surf binding with SWIG (code generated in maintainer mode only):
2018 - plugin to handle callbacks
2019 - CPU model only for the moment
2022 * Supernovae build mode is definitively removed. It was used to improve
2023 inlining and inter-module optimizations. It is nowadays superseded by
2024 link-time optimizations commonly available in compilers.
2025 * Update ns-3 find lib. Bindings for ns-3 should work again now.
2026 * Add boost dependency for surf++
2027 * Add new macro for tests
2028 - ADD_TESH(name <tesh_args>)
2029 - ADD_TESH_FACTORIES(name "thread;ucontext;raw" <tesh_args>)
2033 - xbt_bar_t XBT_barrier_init(unsigned int count)
2034 - int XBT_barrier_wait(xbt_bar_t barrier)
2035 - void XBT_barrier_destroy(xbt_bar_t barrier)
2036 * Make the xbt_os_time module public
2038 -- Sat May 31 22:39:38 CEST 2014 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2040 SimGrid (3.10) stable; urgency=low
2042 The Clean Diaper Release, a.k.a. SimGrid is leak-free.
2045 * Reintegrate Java to the main archive as desynchronizing these
2046 package is not acceptable anymore (Java is now considered stable)
2047 * Add explicit synchronization facilities through semaphores
2048 * Bug fix: Task.setDataSize() only changed the C world, not the value
2049 cached in the Java world
2052 * Dramatically change the way files are handled. API and internals changed, but
2053 this part of MSG was not considered as production grade either.
2054 * Add explicit synchronization facilities through semaphores
2055 * Add a new function MSG_host_get_process_list()
2056 * Preliminary DVFS support (see examples/msg/energy/ for details)
2059 * SMPI is now included directly in the libsimgrid as the windows
2060 linker doesn't force us on splitting it anymore.
2061 * Improvements of the SMPI replay tool:
2062 - Most of the collective communications are now rooted in the same process as
2063 in the original application.
2064 - Traces now rely on the same MPI data type as the application (MPI_BYTE was
2065 used until now). Multiple data types can now be used in a trace.
2066 - The replay tool now supports traces produce either by TAU or a modified
2068 - Bug Fix: the compute part of the reduce action is now taken into account.
2069 - Gatherv collective is now supported
2070 - SimGrid (SMPI for now) can generate replay traces as well. Option -trace-ti
2071 of smpirun outputs time independent traces for the current run. One file
2072 is created per process. If too many processes are simulated, this behavior
2073 can be changed to one file for all processes by using the
2074 tracing/smpi/format/ti_one_file flag
2075 * smpirun generates the host file if needed (with given host count and platform)
2076 * Integration of more than 100 STAR-MPI, MPICH, OpenMPI collective algorithms
2077 - allows to select one in particular with --cfg=smpi/coll_name:algorithm
2078 - allows to use the decision logic of OpenMPI(1.7) or MPICH(3.0.4) by setting
2079 --cfg=smpi/coll_selector:(mpich/ompi)
2080 * Support for new functions: MPI_Issend, MPI_Ssend, Commutative operations in
2082 * Add a --cfg:tracing/smpi/internals option, to trace internal communications
2083 happening inside a collective SMPI call.
2084 * Fix the behavior of complex data types handling.
2085 * Make MPI_Wtime another synchronization point to take computations into
2087 * Replace MPICH-1 test suite by the one from MPICH 3.0.4. Can be built using
2088 enable_smpi_MPICH3_testsuite flag in cmake. Run with ctest.
2089 * Add all missing Fortran bindings, SMPI should work with Fortran 90
2090 (no privatization of global variables yet)
2091 * Preliminary DVFS support (see examples/smpi/energy/ for details)
2094 * Verification of liveness properties is now available for SMPI applications
2095 (in addition to MSG applications)
2096 * Bugged examples using SMPI in examples/smpi/mc/
2097 * Add --cfg=model-check/visited option. Allows the verification of infinite
2098 programs. Detection of loops in the execution thanks to the system state
2099 comparison and reduction of the state space to explore. Can be combined with
2100 DPOR for safety properties.
2103 * Allow to change SimGrid configuration (see --help) within the code
2104 thanks to SD_config() as it can be done in MSG.
2105 * Add a new function SD_task_set_amount() upon user request.
2108 * Handle units for values (10ms, 10kiloflops, 10Bps, 1GB, ...)
2109 * Remove rule based routing (no more PCRE dependency)
2110 * Add a limiter_link option to cluster tag, to specify a maximum reachable
2111 bandwidth in fullduplex mode when it is less than twice the nominal bandwidth.
2112 * Add a loopback_bw and loopback_lat options to cluster tag.
2113 * Fix the peer tag that could not be mixed with other AS within a Vivaldi
2114 routing. Now peers are encapsulated in an AS and have their own private
2115 router but this is transparent.
2118 * Our own implementation of getline is renamed xbt_getline, and gets
2119 used even if the OS provide a getline(). This should reduce the
2120 configuration complexity by using the same code on all platforms.
2121 * New type: xbt_cfg_elm_boolean.
2122 * Allow to use yes/no for boolean configuration options in the command line.
2123 * Allow to disable SimGrid cleanups at exit from command line option.
2124 There are situations where one may want a simulation to end with an exit.
2125 Unfortunately, calling exit may cause SimGrid to segfault, which is quite
2126 annoying when scripting around the simulator. Adding a
2127 --cfg=clean_atexit:no allows to circumvent this issue.
2130 * Lots of memory leaks were corrected in this release.
2131 There is no known memory leaks anymore, in all of our 600+ tests.
2132 * New command line option --version, to get SimGrid version information.
2133 Packagers may want to add extra words to SIMGRID_VERSION_EXTRA defined in
2135 * Supernovae builds are deprecated, and expected to be removed in the next
2138 -- Sun Nov 17 00:26:44 CET 2013 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2140 SimGrid (3.9) stable; urgency=low
2142 The Grasgory release: GRAS is really dead now.
2144 * Complete overhaul of the internal host structures scheme.
2147 * If you use GRAS, you should stay at SimGrid 3.5 (at most) since it
2148 was considered as experimental and badly maintained since then.
2149 * Keeping it was thus a trap to our potential users, that could take
2150 it instead of MSG or SMPI by mistake despite is pity state.
2151 * GRAS seems to have very few users (if any), and no one volunteered
2152 to maintain it further. It also induces a lot of XBT code (for
2153 portability sake), that must be maintained too.
2154 * For all these reasons, we killed GRAS. If someone wants to revive it
2155 in the future, don't cry, our git history still remembers of GRAS.
2158 * Major overhaul. Merge our documentation again as time proved that
2159 splitting it was really not helping our users.
2160 * Further improve the developer documentation to help newcomers
2161 hacking on SimGrid itself. The user documentation (and in
2162 particular, the beginner documentation) is still in a sorry state.
2165 * Now works on Windows too!
2166 * Much more extensive test suite, from MPICH
2169 * Add a new loader (SD_PTG_dotload) that creates a parallel task graph
2170 (i.e., a DAG whose nodes are parallel tasks) from a dot file. Creates a
2171 dynar of SD_TASK_COMP_PAR_AMDAHL and SD_TASK_COMM_MXN_1D_BLOCK tasks.
2172 * Bug fix: let task be scheduled when the last dependency to be solved is
2173 a control dependency.
2174 * Remove SD_load_environment_script function.
2175 Use the C sg_platf function if you want to declare a platform
2179 * New function: MSG_process_get_number()
2180 * Old function documented: MSG_config()
2181 * Remove MSG_load_platform_script function
2182 Use the C sg_platf function if you want to declare a platform
2186 * Change the default value of the TCP_gamma constant (maximal size of TCP
2187 congestion window) to a more realistic 4MiB value. If you notice changes in
2188 your simulation results, you can fall back to the previous 20k tiny window
2189 by adding --cfg=network/TCP_gamma:20000 on command line.
2190 * (Hopefully) fix a bug wrt periodic availability and state traces
2191 * Bug fix: use default values at start when first event in availability/state
2192 trace is not at time 0.
2195 * remove the "new_" part of function name sg_platf_new_trace_connect
2196 (resulting in sg_platf_trace_connect), since it does not create
2200 * Kill synchronized dynars, and xbt_dynar_dopar(). We cannot think of a
2201 use case where it's really mandatory, and maintaining it was a pain in
2203 * New: xbt_fifo_search(), search an item with a user-provided
2204 comparison function instead of dumb pointer comparison.
2207 * Fix the lua deployment:
2208 Use `simgrid.init_application()` before deployment instead of
2209 `simgrid.msg_register_application()` after.
2212 * Transfer the tracing files into the corresponding modules.
2214 -- Tue Feb 5 11:31:43 CET 2013 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2216 SimGrid (3.8.1) stable; urgency=low
2218 The "we are told that some people want to also *install* the simgrid
2221 * Add missing file "tesh.1" to the archive.
2223 -- Sat Oct 27 16:12:11 CEST 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2225 SimGrid (3.8) stable; urgency=low
2227 The Psssshiiiit release: SimGrid jumps into the Cloud.
2230 * Add an experimental interface to manipulate VMs. They are mainly
2231 process groups with very few intrinsic semantic, but they should
2232 allow you to build the semantic you want easily.
2233 * New function: MSG_host_set_property_value()
2234 * New function: MSG_process_on_exit(). To clean memory in all cases.
2235 * Bug fixes that made the host (and link) failures unusable.
2236 * Add a way to auto-restart process when the host in which they are
2237 executing comes back (ON_FAILURE="RESTART" on deployment file,
2238 MSG_process_auto_restart_set).
2239 * Use the "msg_" prefix for all datatypes (instead of m_, msg_ and MSG_),
2240 please stop using the old ones, they are DEPRECATED.
2242 * Deprecate functions MSG_global_init() / MSG_global_init_args()
2243 Please use MSG_init() instead. (reducing the amount of entry
2244 points in the library helps us).
2245 * Make it impossible to link against the wrong version of the lib
2246 * Deprecate MSG_clean(). No need to call it anymore.
2247 * Function MSG_get_host_number() is not deprecated anymore.
2250 * Split the doc into a user guide and a reference guide.
2251 * Start a developper guide to help people hacking on SimGrid.
2254 * Enable tracing by default. This modules rocks you should use it.
2255 * Remove option custom_flags. Now use environment variables CFLAGS
2257 * Use default cmake things to detect lua instead of home grown ones.
2258 * New option "enable_mallocators" to disable mallocators, for debugging
2259 purpose ("on" by default).
2262 * Bug fixes around the resource failures: don't let the processes
2263 survive the host they are running onto.
2264 * Add an interface to auto-restart processes when the host in which they are
2265 executing comes back.
2266 * Ensures that SIMIX_clean is called automatically. It's not part of
2267 the public interface anymore (bindings should be updated).
2270 * Bug fix for when SD_Simulate is called with a positive value: be careful
2271 when comparing doubles. Sometimes they are different for non significant
2273 * New types of typed tasks. SD_TASK_COMP_PAR_AMDAHL represents a
2274 parallel task whose initial work is distributed among host according
2275 to the Amdahl's law. Such tasks are created with a parameter alpha
2276 that corresponds to the non-parallelizable part of the computation.
2277 SD_TASK_COMM_PAR_MXN_1D_BLOCK represents a complex data redistribution
2278 between two sets of workstations assuming a 1D block distribution (each
2279 workstation owns a similar share of data) on both sides.
2281 These tasks can be scheduled with SD_task_schedulel or SD_task_schedulev.
2282 Data redistribution will be automatically scheduled once parent and child
2283 are both scheduled. The filling of computation_amount and
2284 communication_amount structures is now done seamlessly thanks to the chosen
2286 * New function SD_workstation_dump to display various information
2287 * New function SD_task_set_rate to throttle the bandwidth allowed to be used
2288 by a SD_TASK_COMM_E2E typed task. This rate depends on both the nominal
2289 bandwidth on the route onto which the task is scheduled and the amount of
2291 To divide the nominal bandwidth by 2, the rate then has to be:
2292 rate = bandwidth/(2*amount)
2293 * Compute tasks that have failed can now be rescheduled and executed again
2294 (from their beginning)
2295 * Increasing source code coverage (src/simdag is now covered at 95.8%
2299 * Re-implement time-independent trace replay using SMPI (at the
2300 smpi_smp_* level) instead of MSG. This should replace
2301 examples/msg/actions/actions.c
2302 * Implement support of MPI Datatypes (vectors, hvectors, indexed,
2303 hindexed and structs)
2304 * Implement the exchange of non-contiguous data.
2305 [Khalid Hasanov & Jean-Noel Quintin] Thanks for the patch, guys.
2306 * Correct behavior of smpi/sender_gap and set its default value to 0
2307 * Add option to asynchronously send small messages to allow better
2308 simulation of pt2pt communications. --cfg=smpi/async_small_threshold:value
2309 specifies the size in bytes under which messages will be asynchronously sent.
2310 * Add support of MPI_Iprobe, MPI_Probe, MPI_Testall, MPI_Wtick functions
2311 * SMPI now handles more MPI specific values in input. Closes [#14389] and [#14388]
2314 * New C interface to define a platform: XML is now optional.
2315 For more info, please check include/simgrid/platf.h.
2316 * New interface to define random platforms from the C:
2317 For more info, please check include/simgrid/platf_generator.h and
2318 examples/msg/masterslave/masterslave_platfgen.c
2319 * Export a sg_cmdline dynar containing all the arguments we got from
2323 * Two new tracing options for adding comments to trace file so you
2324 can track your experiments (see --help-tracing for details).
2325 * New option to generate an impoverished trace file (--cfg=tracing/basic:1)
2326 * Adding the SimGrid version that generated the trace file as a comment.
2327 * Instrumenting other MSG functions (MSG_task_isend_with_matching and MSG_task_dsend)
2328 * Fix to avoid key clashes on Paje links
2329 * Other minor fixes related to the Paje specification
2332 * Functions xbt_dict_hash() and xbt_dict_hash_ext() are made public,
2333 and renamed to xbt_str_hash() and xbt_str_hash_ext().
2334 * New function: xbt_os_timer_resume() to restart a timer w/o resetting it.
2335 * Greatly improve the robustness of mmalloc to user errors (such as
2336 using an area after freeing it, or freeing it twice)
2338 -- Thu Oct 25 17:30:06 CEST 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2340 SimGrid-java (3.8.1) stable; urgency=low
2342 * New module: org.simgrid.trace.Trace (SimGrid trace bindings)
2343 Warning: all methods are visible, but only some of them are
2344 implemented so far. Check the source (src/jtrace.c)
2345 for further information.
2346 * New module: org.simgrid.msg.File (SimGrid File management functions)
2347 * New Module: org.simgrid.msg.VM (SimGrid interface to mimick IAAS clouds)
2348 * Change the meaning of Process.restart: now restart the process from
2349 the beginning, like MSG_process_restart in C.
2350 * Add Process.setAutoRestart: handling of process restart when failed
2352 * Add Process.getProperty, Host.getProperty, Host.getProperty: allows
2353 you to retrieve the properties of the processes/hosts
2354 * Deprecate Msg.clean(): you can just forget about it now.
2355 * New function Process.getCount(), that only works when compiling
2356 with the not yet released version 3.9 of the C library.
2358 * New context factory based on Coroutines. It mandates a modified JVM
2359 but then, the simulations run about five times faster, and there is
2360 no limit to the amount of processes (beside of the available memory).
2362 -- 2012-12-04 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2364 SimGrid (3.7.1) stable; urgency=low
2367 * Restore the prototype of MSG_process_create_with_environment() to
2368 the pre-3.7 situation by removing the kill_time argument.
2369 * Add a MSG_process_set_kill_time() function instead.
2372 * Fix weird behaviors when dealing with parallel tasks.
2375 * Simgrid is now built as a dll.
2376 * Simgrid-java now works on Windows.
2377 * Simgrid-Java is now included into Windows package.
2380 * First pre-build package for MacOSX.
2383 * Fix compilation when using MSG_USE_DEPRECATED.
2384 * Fix some compilation issues on Macs and Windows.
2385 * Reduce the number of failing tests on exotic systems, like Debian/Hurd.
2386 * Environment variables CFLAGS and LDFLAGS are now honored by cmake.
2388 We discovered that the Lua console is broken, but we are missing the
2389 manpower to fix it right now. The problem existed in 3.7 too, so we
2390 are not blocking the release for that. Sorry if you depended on this
2391 feature, any help would be really welcome.
2393 -- Thu Jun 7 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2396 SimGrid-java (3.7.1) stable; urgency=low
2398 The "Java aint got to be bloated and slow" release
2401 * Various internal cleanups and performance improvement
2402 Simulations are expected to run up to twice faster or so
2403 * Make Process.kill(process) an instance method, not a static one
2404 * User processes are not java.lang.Thread subclasses.
2405 This breaks the compatibility (sorry), but previous API was
2406 brain-dead, making it impossible to have non-trivial
2407 initializations in the process constructor.
2408 * Require a full constructor per Process sub-class.
2409 Kinda breaks the compatibility (sorry), but this allows a much more
2410 efficient way to launch the processes at simulation startup.
2411 * Do not embeed our version of semaphores, java 1.5 can be considered
2412 as sufficiently prevalent for us to not dupplicate its features.
2416 * Add examples for almost every part of the API
2417 We spotted and fixed a lot of bugs in the process
2419 * New module: asynchronous communication API
2420 * New function: Process.sleep()
2421 It takes milliseconds as argument, just as java.lang.Thread.sleep()
2422 * New module: org.simgrid.msg.Mutex (SimGrid mutexes)
2423 * New module: org.simgrid.msg.RngStream (RngStreams random generators)
2425 -- 2012-06-12 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2427 SimGrid (3.7) stable; urgency=low
2429 The "spring cleanups (before the next Big Project kicks in)" release.
2432 * We can specify the SMPI latency/bandwidth factor with command line
2433 add --cfg=smpi/bw_factor:"threshold0:value0;...;thresholdN:valueN"
2434 or add --cfg=smpi/lat_factor:"threshold0:value0;...;thresholdN:valueN"
2435 You can also use the "config tag" from platform file by adding this line
2436 <prop id="smpi/bw_factor" value="threshold0:value0;...;thresholdN:valueN"></prop>
2437 (see "example/platforms/tag_config.xml" to use "config tag").
2438 Note that the command line supersedes the platform file configuration.
2439 * Change the correction factors used in LMM model, according to
2440 the latest experiments described in INRIA RR-7821.
2441 Accuracy should be improved this way.
2442 * Use the partial invalidation optimization by default for the
2443 network too. Should produce the exact same results, only faster.
2444 * Major cleanup in surf to merge models and split some optimization
2445 mechanisms from the core of the models. As a result you can now
2446 specify which model to use (e.g., --cfg=network/model:LV08
2447 --cfg=cpu/model:Cas01) and which optimization mode to use
2448 (e.g., --cfg=network/optim:lazy --cfg=cpu/optim:TI).
2449 Incompatible combinations should err at initialization. See
2450 --help-models for the list of all models and optimization modes.
2451 * The CLM03 workstation model was dropped for simplicity because it
2452 used the deprecated CM02 network model. Use default instead.
2453 * Rename the TCP_gamma configuration option to network/TCP_gamma
2454 * Rename the coordinates configuration option to
2455 network/coordinates, and document it
2456 * Use now crosstraffic keyword instead of the terribly misleading
2457 fullduplex keyword. It is activated by default now in the current
2458 default model, use --cfg=network/crosstraffic:0 to turn it off.
2459 * Ongoing refactoring the model parsing to make XML files optional
2460 See include/simgrid/platf.h for details (still to be completed)
2463 * Major overhaul of the documentation. Almost instructive now :/
2464 * Deprecate the use of m_channel_t mechanism like MSG_task_{get,put}
2465 functions and friends. This interface was considered as
2466 deprecated since over 2 years, it's time to inform our users that it is.
2467 Switch to MSG_task_{send,recv} instead, or compile SimGrid command line
2468 'cmake -Dcustom_flags="-DMSG_USE_DEPRECATED" .' if you really need to
2469 use these (crappy) functions in your code.
2470 These functions will be removed soon. Stop using them now.
2471 * Deprecate MSG_get_host_{table,number}
2472 Implement MSG_hosts_as_dynar() instead.
2473 * Implement MSG_processes_as_dynar() (Closes gforge #13642)
2474 * Remove the public field msg_host_t->name. Use MSG_host_get_name()
2477 * Stabilize the parallel execution mode of user contexts
2478 * Introduce configuration variables to control parallel execution:
2479 - contexts/synchro: Synchronization mode to use when running
2480 contexts in parallel (either futex, posix or busy_wait)
2481 - contexts/parallel_threshold: Minimal number of user contexts
2482 that must be part of a scheduling round to switch to parallel
2483 execution mode (raw contexts only)
2484 * Fix bugs that prevented to use suspend/resume along with
2485 synchronization structures.
2486 * Fix bugs in process termination that lead to invalid memory access
2487 in very specific conditions.
2490 * Introduce a parallel mode for the models (controlled by surf/nthreads
2491 configuration item). In our tests, running the models in parallel
2492 never lead to any speedups because they are so fast that the gain
2493 of computing each model in parallel does not amortizes the
2494 synchronization costs, even when ultra fast futexes are used.
2495 This is released anyway because YMMV.
2498 * Performance boost by using a swag internally to compute the set of
2499 tasks that are finished and should constitute the return value of
2503 * Enable it by default now that it is considered rather stable.
2506 * Documentation of the tracing functions.
2507 * Performance gains when tracing categorized/uncategorized resource
2508 utilization by avoiding calls to get route when updating resource
2509 variables. LMM constraints are being used instead.
2510 * API changed to set task categories. Use MSG_task_set_category instead
2511 of TRACE_msg_set_task_category, and SD_task_set_category instead
2512 of TRACE_sd_set_task_category. They only work if ENABLE_TRACING is ON.
2513 * Bugfix for graphicator, routes not correctly obtained, memory leaks
2514 * Examples for link user variables added (see at examples/msg/tracing/)
2515 * Deprecated function TRACE_msg_set_process_category completely removed
2516 * Trace header updated according to the latest Paje file format
2517 * Tracing network lazy updates, no longer obligate users to use full updates
2518 * --cfg=tracing/platform:1 also registers power/bandwidth variables
2519 * Experimental: let user code declare/set/push/pop application states for hosts
2520 * API changed to allow the manual creation of graph configuration files
2521 for Triva. See TRACE_get_node_types() and TRACE_get_edge_types().
2524 * Improve the API of Lua MSG bindings, using the Lua spirit.
2525 * Each simulated process now lives in its own Lua world (globals are
2526 automatically duplicated). It helps writing simulators. Will allow
2527 to run Splay programs within SimGrid in the future.
2528 * Add a Chord example in Lua, equivalent to the MSG one.
2531 * Start the implementation of a solution to express temporal
2532 properties, not only local assertions. This is still an
2533 experimental work in progress, stay clear from it to be safe.
2537 - Add new runtime parameters --help-logs and --help-log-categories
2538 to display information about supported logging parameters and
2540 - Old deprecated parameters --{gras,surf,msg,simix,xbt}-log=...
2541 don't exists anymore.
2542 * Mallocators: allow value NULL for the reset function.
2544 - New function xbt_dict_new_homogeneous(void(*)(void*)) to
2545 create homogeneous dictionaries, where all the elements share the
2546 same free function. Non homogeneous dictionaries will be
2547 deprecated in the next release.
2548 - Dicts of scalar elements (xbt_dicti_*) are deprecated.
2549 - Multi-level dictionaries are deprecated.
2551 - new function xbt_dynar_search_or_negative() that is useful when
2552 you have less than 2 million elements in your dynar and don't
2553 want of the extra complexity of catching exceptions when the
2554 element is not found.
2556 - Make xbt_os_thread module (for thread portability) public.
2557 Documentation is still to come, sorry.
2559 - Cleanups and simplifications to make it maintainable again.
2560 - Exotic features (such as memalign and valloc) were removed.
2561 - The metadata were extended and improved so that the
2562 model-checker becomes able to explore and inspect the heaps.
2563 - This may induce a performance drop when enable_model-checking is
2564 ON in cmake (even if it's not used in the simulation), but it is
2565 necessary at this point to get MC working.
2567 Turn model-checking OFF if simulation performance matters to you.
2568 Not enabling it at runtime is not enough, disable it in cmake.
2570 -- Tue May 15 11:30:19 UTC 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2573 SimGrid (3.6.2) stable; urgency=low
2575 The "Not coding new stuff allows to polish old things" release.
2578 * New bindings to the NS3 packet level simulator (experimental)
2579 * Use the raw (efficient) execution contexts instead of the sysv
2580 (portable) ones when possible.
2581 * libpcre is now mandatory in any cases since not using it led to
2582 severe performance loss and possibly other issues
2583 * Update the XML platforms:
2584 - G5K: include the latest machine in Nancy
2585 - GridPP and LCG: new platforms
2586 * Documentation was partially updated, at least (more to come)
2588 Bug fixes, cosmetics and small improvements
2589 * Free terminated processes before the end of the simulation to avoid
2590 exhausting the memory of users having very dynamic amount of
2592 * Bug fix and cosmetics about canceling non-running tasks
2593 * Bug fix about the dot loader's issues when using libcgraph
2596 * Create an installer for windows with nsis (amd64 and win32)
2597 - Add an hello world project to illustrate simgrid project creation.
2598 - Embed libpcre into the Simgrid installer to avoid
2599 its compilation burden
2600 * The raw execution contexts should work on Apple now
2601 * Port to Windows 64 bits
2602 - Sysv contexts now have an implementation for this arch
2603 - GRAS communication features now support this arch
2604 * Drop support for borland compiler on windows
2605 - this code was not maintained, and we kinda depend on gcc nowadays
2606 * Fix portability issues on kfreebsd/gnu: build error about semaphores
2607 * Fix portability issue on unstable ubuntu: linker became picky on
2610 -- Wed Oct 5 15:51:01 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2612 SimGrid (3.6.1) stable; urgency=low
2614 The "Oops, we broke Macs too" release
2617 * Fixed contexts detection so that raw ones are used when possible
2618 * On Mac, do not use Posix Ucontexts with gcc v4.[1-5] since this
2619 leads to a strange error, with user code segfaulting sometimes when
2620 the generated code is not perfectly aligned (which is not
2621 controllable from the user side, depends on the amount of code)
2624 * New macro: CATCH_ANONYMOUS, which is like CATCH(e) but without argument.
2626 -- Mon Jun 27 13:59:03 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2628 SimGrid-java (3.6) unstable; urgency=low
2631 * Split of every thing from simgrid v3.5 into a separate package.
2633 -- 2011-10-05 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2635 SimGrid (3.6) stable; urgency=medium
2637 The Summer Release, also known as the "OMG! They Killed Kenny!" version
2640 * Bindings now constitute their own package, separated from the main one.
2641 Rationale: reduce our maintenance nightmare by reducing the module coupling
2642 They will soon be released on their own on gforge.
2644 svn co svn://scm.gforge.inria.fr/svn/simgrid/contrib/trunk/simgrid-java
2645 svn co svn://scm.gforge.inria.fr/svn/simgrid/contrib/trunk/simgrid-ruby
2647 GRAS: It is not considered as stable anymore, but experimental. Sorry.
2648 * It's not quite deprecated for now because we have no replacement,
2649 but it may soon become the case.
2652 * New MPI functions supported: MPI_Comm_disconnect, MPI_Comm_get_name
2653 * Fortran: New user-level cache variable to store the rank of the running
2654 process. This improves performance by an order of magnitude.
2655 * C: New coccinelle script to automatically locate and modify global and
2656 local static variables.
2657 * Improved SMPI network model with a sender-side gap to account for multiple
2661 * New function MSG_comm_get_status(). MSG_comm_test() and MSG_comm_testany()
2662 only say if a communication is finished, no matter whether it succeeded or
2663 failed. You can call MSG_comm_get_status() to know the status of a finished
2665 * New function MSG_task_dsend() to send a task and detach it. When a
2666 communication is detached, you are never notified of its success or failure
2667 and the memory is released automatically once it is finished. This function
2668 is useful when you don't care about the end nor the success of a
2670 * Change the prototypes of action replay. Sorry for inconvenience,
2671 but this is really more efficient this way (and to adapt your code,
2672 you just have to fix the initialization, that shouldn't be too long)
2673 * Kill the braindead MSG_task_refcount_dec() function. I guess nobody
2674 ever managed to do anything useful with it.
2675 * New function MSG_comm_testany(). Similarly to MSG_comm_waitany(), it
2676 takes a dynar of communications. It returns immediately and gives the
2677 index of a finished communication (if any).
2678 * New example: a basic implementation of the Chord P2P algorithm.
2681 * New model for multi-core CPUs. You can now use the core attribute to
2682 precise the number of cores of a host. This is a basic model. Every
2683 process running on the host receives at most the power provided in
2684 the DTD (throughput<=power). Total throughput of process cannot exceed
2686 * New peer tag. This peer tag creates a tiny AS comprising a host and a
2687 router linked by an up-link and a down-link (possibly asymmetrical).
2688 This kind of pattern allows to easily build last-mile model style platforms.
2689 Aggregating such patterns in a rule-based AS is thus the technique of
2690 choice for modeling large peer-to-peer/volunteer computing/cloud platforms.
2691 * New model for Vivaldi routing. We transformed the Vivaldi network model
2692 into a Vivaldi routing model (based on the rule-based model). This allows to
2693 combine Vivaldi based latencies with last-mile platforms.
2696 * Added a check for NaN of IEEE754 infinite in the double entries of
2698 * Introduce a new context factory "raw", highly inspirated from the
2699 ucontext factory, but using manually crafted functions in assembly to
2700 do the work in an efficient manner.
2701 * Allow to change the used context factory at run time, not only at
2702 compilation time. Use --cfg=contexts/factory:raw for maximal speed.
2703 * Add an option --cfg=contexts/stacksize:N to set the stack size of the user
2704 contexts at runtime (only with raw contexts or ucontexts).
2705 * Completely rewrote this module to allow parallel execution of user
2706 processes. Use --cfg=contexts/nthreads:N to execute user processes
2707 with N parallel threads (the default is 1, meaning no parallelism).
2708 * Allow to decide dynamically between sequential and parallel modes.
2709 When nthreads > 1, you can use --cfg=contexts/threshold:P to run the user
2710 processes in parallel only when their number is greater than or equal to P
2712 * Added a check for NaN of IEEE754 infinite in the double entries of
2716 * New command line option: if you pass --cfg=verbose-exit:0, SimGrid
2717 won't output the state of processes when interrupted with Ctrl-C
2718 * Add a new function xbt_dynar_to_array that transforms a dynar into a
2719 NULL-terminated array. This may solve backward compatibility issues
2720 due to the change to return type of SD_simulate. See also:
2721 http://lists.gforge.inria.fr/pipermail/simgrid-user/2010-December/002206.html
2722 * Add new macros with variable number of arguments.
2723 - in xbt/log.h: XBT_DEBUG, XBT_VERB, XBT_INFO, etc.
2724 - in xbt/asserts.h: xbt_assert
2725 - in xbt/cunit.h: xbt_test_{add,fail,assert,log}
2726 - in xbt/ex.h: THROWF and RETHROWF.
2727 Define XBT_USE_DEPRECATED if you want to use the old numbered macros like
2729 * Change xbt_die() to accept a format string with arguments, just like printf.
2730 * New data structure: xbt_lib_t, like a dict but more general and with better
2734 * New configuration options
2735 Options triva/categorized and triva/uncategorized can be used to generate
2736 graph configuration files for Triva visualization tool.
2737 * Configuration option tracing/platform is renamed to tracing/categorized
2738 * XBT logging makes tracing error checks easier, new root log hierarchy: instr
2739 * New TRACE_user_link_variable interface:
2740 User provides the name of the link and the tracing variable to attach to it
2741 * the declaration of tracing categories must be done after the environment
2743 * simpler tracing interface, just one way to declare categories
2744 TRACE_category or TRACE_category_with_color, it is up to you
2745 * links in the trace file are again identified by their names
2746 * trace contains the full platform hierarchy exactly as declared using the ASes
2747 * Options tracing/msg/[task|process]:1 groups the process by hosts
2748 for both cases, tasks and processes must have names that are unique during the simulation
2749 these options generate traces that are suited to gantt-charts, such as the space-time view of Paje
2750 * The experimental option tracing/msg/volume is deprecated
2751 its functionality may be reincorporated if needed
2753 The tracing generates a trace file with unordered timestamped events,
2754 because of the way the core simulator (surf) works. A script available
2755 at the tools directory (fix-paje-trace.sh) can be used to put the events
2756 in order. We have changed the tracing so it can generate ordered timestamped
2757 events in the final trace, but depending on the simulator (and how much time
2758 is simulated) that can lead to a huge memory utilization. It is deactivated
2759 by default, but it can be activated using the --cfg=tracing/buffer:1 switch.
2761 Build Infrastructure
2762 * Define a SIMGRID_VERSION macro in simgrid_config.h.
2763 - We are trying hard to keep the API stable, but it may happen that
2764 some things change (we're a research project after all, not a
2765 nuclear plant operating system). If such things should happen, you
2766 could rely on that macro to adapt.
2767 - current value: 30600 for 3.06.00, aka 3.6
2768 * Define macro MAKE_SIMGRID_VERSION(major, minor, patch) to help building
2769 a number that can be compared with SIMGRID_VERSION.
2770 * Add a build option -Denable_debug (set to ON by default): when set to OFF,
2771 assertions and verbose/debug logging events are disabled at compile time.
2773 -- Tue Jun 21 08:57:43 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2775 SimGrid (3.5) stable; urgency=medium
2778 * New feature to any SimGrid-based simulator: Model-Checking
2779 Check SIN#1 for more details.
2782 * New Model SMPI (three-interval linear regression for correction factors)
2783 See RR-7426, available at http://hal.inria.fr/inria-00527150
2784 * Ability to use FORTRAN MPI code (through f2c, automatically privatized)
2785 * New MPI functions supported: MPI_Get_count(), MPI_Comm_split()
2786 * New: RAM folding (see RR-7426 and examples/smpi/NAS/DT-folding)
2787 * New: execution sampling (see RR-7426 and examples/smpi/NAS/EP-sampling)
2788 * See also src/smpi/README
2793 - Tracing API changes: TRACE_start and TRACE_end should not be called
2794 by user-code. They are automatically called by simulators created
2795 with SimDAG, MSG and SMPI if the toolkit is compiled with
2796 tracing_enabled=ON. Categories declaration and utilization remain the
2797 same for MSG and SimDag.
2798 - A function was added to the tracing API to declare categories with
2800 - TRACE_category_with_color (char *category, char *color)
2801 where color must be in the following format
2802 "%f %f %f", red, green, blue
2803 and red, green, blue are float values in the interval [0, 1]
2804 - User can specify NULL as color parameter, or continue calling
2805 TRACE_category (cat)
2806 On that case, the tracing system will define random colors
2807 - The following command-line options are supported:
2808 --cfg=tracing/filename:msg.trace
2809 --cfg=tracing:1 (activate tracing, needed to use others)
2810 --cfg=tracing/platform:1 (categorized resource use)
2811 --cfg=tracing/uncategorized:1 (uncategorized resource use)
2812 --cfg=tracing/msg/task:1 (task creation)
2813 --cfg=tracing/msg/process:1 (process creation, migration)
2814 --cfg=tracing/msg/volume:1 (volume of MSG send/recv)
2815 --cfg=tracing/smpi:1 (SMPI interface tracing)
2816 --cfg=tracing/simdag:1 (allow SimDAG tasks receive categories)
2817 - examples of examples/msg/tracing updated
2819 - DAXLoader and DOTLoader functions can generate tasks with categories
2820 - A new function to attribute a category to SD tasks:
2821 TRACE_sd_set_task_category (SD_task_t task, char *category)
2822 * Tracing the MPI interface implemented by SMPI
2823 - Collective operations are traced with states
2824 - Point-to-Point operations are traced with states/links
2825 - Tracing activated by a parameter "-trace filename" passed
2826 to smpirun during execution (considering that simgrid
2827 is compiled with tracing enabled)
2828 - To run the simulation with gdb, the simulator
2829 accepts --cfg=tracing/smpi:1 to trace SMPI
2830 - tesh files to check if smpi tracing is ok
2831 - See examples/smpi/NAS/DT-trace
2832 * GTNetS tracing re-worked
2833 - adaptation to the tracing system of GTNets to cope
2834 with modifications regarding the fullduplex mode
2835 - new tesh files to check if gtnets tracing is ok
2838 * Asynchronous communications through the functions:
2839 MSG_task_isend/irecv and MSG_comm_test/wait/waitall
2840 * New function: MSG_load_platform_script()
2841 to make possible using a lua script instead of XML files to set up platforms
2842 * New function: MSG_set_function
2843 to associate functions to processes, used when bypassing the parser
2844 * New functions: MSG_task_set_name(), MSG_task_set_compute_duration()
2846 Platforms: Add some more examples in examples/platforms
2847 * Grid'5000: see www.grid5000.fr
2848 * *_30000_hosts.xml: various huge files [mainly scalability testing]
2851 * Change the XML format. This is a very important modification. SimGrid
2852 3.5 introduces a new hierarchical format based on the notion of
2853 Autonomous Systems. Compatibility with old format is ensured
2854 through the perl script provided in the install bin directory
2855 bin/simgrid_update_xml.
2856 It is now possible to build platforms with specific routing
2857 mechanism (Full/Dijkstra/DijkstraCache/Floyd) and to easily
2858 connect several platforms together. We will try to provide soon
2859 set of realistic platforms exploiting these properties (have a
2860 look at examples/platforms/ for the moment).
2861 * Take the opportunity of the XML format change to be a good XML citizen:
2862 rename link:ctn to link_ctn and similar changes (also dealt with by
2864 * Add a new routing scheme (rule-based) using regular expressions. It
2865 enables to have an extremely low memory footprint when the
2866 underlying routing is simple and can be compactly described. You
2867 need to have libpcre4-dev (perl regular expressions) installed if
2868 you want to use this routing scheme.
2869 * Revive the cluster TAG and allow to easily and efficiently (both in
2870 term of memory and speed) connect clusters together. Have a look
2871 at teshsuite/simdag/platforms/ to see how this can be done. With
2872 this tag, you can create clusters with thousands of tasks at no
2873 cost (have a look at examples/platforms/).
2874 Note: clusters are implemented as ASes, so there is no need for an
2875 enclosing AS tag if you have only one cluster in your platform.
2876 * Add new generic functions in the public interface that allows the user
2877 to call SURF 'create_resource' methods from your code (same
2878 functionality as the XML bypass mechanism but with a much lighter
2880 * Add a new model (enabled through command line --cfg=network/model:SMPI)
2881 that uses a piecewise linear approximation to produce better
2882 results when exchanging small messages.
2883 * Add a new parameter to handle correctly full duplex link and account
2884 for interferences between uplink and downlink communications
2885 (activate with --cfg=fullduplex:1).
2888 * Rename the SD_READY (all dependencies are satisfied and task is
2889 scheduled) state in SD_RUNNABLE and define a new SD_SCHEDULABLE (all
2890 dependencies are satisfied) state.
2891 This prevents a confusion between the notion of "ready to schedule"
2892 (SD_SCHEDULABLE) used in DAG scheduling and that of "ready to be
2893 simulated" (SD_RUNNABLE) used by the simulation kernel.
2894 * Change the way a task is considered as ready. Instead of removing
2895 dependencies when a task is done, a counter is decreased. This way,
2896 it is always possible to reach ancestors thanks to the
2897 SD_taks_get_parents function (even after the end of the simulation.)
2898 * Change the return type of SD_Simulate from (SD_task_t*) into
2899 xbt_dynar_t. This function was in handling a dynar internally and
2900 converted it into a NULL terminated array for historical reasons.
2901 * New function SD_dotload(char*) to load a DAG described in dot
2902 format. This loader and the corresponding examples require the
2903 installation of the graphviz library.
2904 * Fix a bug in the management of tasks of size 0 in the surf network
2905 models. This problem was only visible with SIMDAG and you should
2906 thus disregard results produced with earlier versions if you
2907 relied on this feature (some tasks were blocked because of this).
2908 * Fix a bunch of stuff that prevented to use classical models with SIMDAG
2909 even though your applications were doing only point-to-point
2910 communications and sequential computations. Now you can really use any
2911 model you want (of course, if you create real parallel tasks, which are
2912 not implemented in most models beside ptaskL07, this will abort).
2913 * Add an example that schedules a DAX on an heterogeneous platform
2914 using a Min-Min strategy.
2915 * New function SD_workstation_get_current_task() that returns the kind
2916 of task currently running on a workstation in the sequential access
2918 * Raise some warnings when unexecuted tasks remains at the end of the
2919 simulation. This is usually caused by cycles in the DAG.
2922 * New function: SIMIX_process_set_function() called by MSG_set_function
2923 * Change the underlying waiting queue in semaphores so that a process
2924 can wait on several of them simultaneously (as in waitany).
2925 * Fix the way to handle tokens in semaphores so that all access patterns
2926 work: {acquire, acquire_timeout, waitany} / {release, release_forever}.
2927 * kill the dirty pimple SIMIX_message_sizes_output()
2928 Please use (proper) visualization instead
2931 * New data container: setset (set of sets of elements)
2932 * New module: mmalloc (mapped malloc, allowing to have several
2933 independent segments of malloc)
2934 * New function: xbt_dict_cursor_set_data()
2935 * New functions: xbt_dynar_sort(), xbt_dynar_compare()
2936 * New function: xbt_dynar_is_empty()
2937 * New function: xbt_fifo_get_last_item()
2938 * Fix xbt_dynar_shrink(): use the right element size.
2939 * Fix xbt_dynar_set*(): allow index larger than current size and memset 0
2940 uninitialized areas during expand.
2941 * Fix semaphores: previous implementation was severely broken.
2942 * Use library init/fini functions for our initialization.
2943 - you can use logs and other feature as soon as you want in your
2944 code (even before the xbt_init / MSG_init)
2945 - xbt_exit is now a no-op and produce a warning when used.
2948 * Port GRAS to new SIMIX mechanisms. This allows gras users to
2949 benefit from the latest improvement to the simulation kernel.
2950 * Kill measurement sockets for now. If you rely on them, sorry. This
2951 release is not for you. This feature will be reintroduced in the
2952 future, but we cannot delay the release any further.
2953 * New function: gras_msgtype_get_name().
2954 * Implement gras_agent_spawn in RL too (the prototype changed a bit)
2955 * Fix (at last) the pmm example: it should not randomly fail anymore.
2957 Build chain: bug fixes and overall polishing
2958 * Cmake is now stable enough. Hence, we killed the autotools.
2959 * Port to windows ( TM :)
2960 * Fix the 'make install' target.
2961 No need to use 'make install-simgrid' anymore
2962 * Introduce a 'make dist' target compiling a *source* archive
2963 'make package' compiles a binary archive
2964 * Compile java files only on need
2965 * Add --cd and --setenv command line options to tesh
2966 * Out of source builds are not fully supported yet, but we are close
2967 * Enable supernovae and optimization flags by default for our users
2970 * Add layer to set up environment directly from lua, without XML.
2971 * The effect of gras_stub_generator can be achieved through
2972 lua too (check examples/gras/console/ping_generator.lua)
2974 -- Wed, 01 Dec 2010 22:09:23 +0100 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2976 SimGrid (3.4.1) stable; urgency=low
2978 The "Polishing easter eggs is probably a good idea" release.
2979 This is a bug fixes release only.
2983 * Fix a bug preventing the tasks from begin garbage collected.
2986 * Fix a bug occurring when a host involved in a communication fails.
2987 This was not detected properly by the other peer involved in the
2988 communication. Now, it's reported as a network error.
2991 * Warn the user about loop dependencies in data flow of DAX files
2992 * Obey the control-flow dependencies of DAX files
2995 * Add option "enable_smpi" allowing to not compile SMPI.
2996 Probably useful for the (Mac) users experiencing a build error here
2997 * Improve the detection of lua5.1 and ruby1.8
2999 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Tus, 04 May 2010 28 16:11:16 +0100
3001 SimGrid (3.4) stable; urgency=low
3003 The "Easter in Cargese" release. Also known as (major changes):
3005 * the "se habla Java, Ruby 話せます, fala-se Lua (and deaf-friendly)"
3006 ~> bindings were greatly improved
3007 ~> new tracing infrastructure for better visualization introduced
3009 * the "Welcome to configury modernity" release.
3010 ~> we switched from autotools to cmake, and improved our cdash
3013 A more detailled list of changes follow (full detail in svn log).
3015 Java Bindings: Various Cleanups
3016 * (install java-gcj-compat-dev on debian-like to use them)
3017 * Remove put/get: no need to export deprecated interface in Java
3018 Use send/receive instead.
3019 * Cleanup the examples and add a README per directory
3020 * Remove example autoDestination (that's the only way to go now)
3021 * Remove example explicitDestination (was a plain copy of basic)
3022 * Make JniException a runtime exception, so that there is no need to
3023 declare the fact that you may encounter such a beast. I guess that
3024 nobody will ever want to survive such error.
3025 * Create specific errors for each MSG case of failure:
3026 host failure, transfer failure, timeout, task cancelled
3027 * Cleanup the exceptions that may get thrown by each function
3028 * Other internal cleanups in Java bindings. Performance still bad :/
3029 Ruby and Lua Bindings: create them
3030 * (install ruby1.8-dev/liblua5.1-0-dev on debian-like to use them)
3031 * That's new and great, you should try them out.
3032 Same functionalities than Java bindings, only even less polished
3034 * Kill the useless "rate" argument of SD_task_get_execution_time()
3035 Everyone used to provide -1 as a value, it was not used, and the
3036 semantic of a possible use wasn't even clear.
3037 * SD_SCHED_NO_COST: Constant to use as cost in SD_task_schedule()
3038 either as comm costs or compute costs to mean that there is no
3039 such thing for that specific task.
3040 * Add a SD_task_set_name() function
3041 * Fix SD_task_unschedule() on typed tasks
3042 * Fix SD_task_get_execution_time() to return seconds, not flop*sec
3043 * In DAX loader, accept useless 'level' attributes to <job> since
3044 LIGO DAGs have them (seem to be to ease graphical representation).
3046 * Add an example masterslave_mailbox.c using send/receive and not
3047 the deprecated put/get interface.
3048 * Kill the MSG_paje_output() function. It's a noop since 2 years.
3049 * Kill MSG_WARNING and MSG_FATAL return codes: they were not used
3051 * Rename MSG_TIMEOUT_FAILURE into MSG_TIMEOUT for sake of logic
3052 (declare MSG_USE_DEPRECATED to still have the old name)
3053 * Add a MSG_task_set_data() function
3054 * About trace replay (see examples/msg/actions):
3056 - Allow to work with splitted trace files for each process
3057 Give the specific trace file as argument of each process,
3058 and call MSG_action_trace_run(NULL)
3059 You can still have one merged file for all processes.
3060 - Fix implementation of collective operations
3061 * Allow task_execute() on 0-sized tasks (closes #10063)
3063 * This is the first release of SimGrid where SMPI is not considered
3064 beta anymore (even if some corners should still be improved)
3065 * Port over the new SIMIX_network submodule (internal refactoring)
3066 * Basic support to log events as with SMPE (use --cfg=SMPE:1)
3067 * Implement more missing elements of the standard:
3069 - MPI_MAXLOC MPI_MINLOC + all associated datatype MPI_DOUBLE_INT,
3071 - MPI_Address() MPI_Get_count() MPI_Type_free() MPI_Type_extent()
3072 MPI_Scan() MPI_Get_processor_name()
3073 - Added implementation of missing case for Alltoall (warning: it's
3074 *not* the bruck variant from OpenMPI; based on Alltoallv instead)
3075 - SMPI_MPI_Gather() SMPI_MPI_Gatherv() SMPI_MPI_Scatterv()
3076 SMPI_MPI_Reduce_scatter() SMPI_MPI_Allgather()
3077 SMPI_MPI_Allgatherv()
3078 * Bug fixes include:
3079 - MPI_Waitsome() was broken
3080 - Allow relative includes in smpicc
3081 - Command line cfg argument 'reference_speed' was ignored...
3082 - Some functions did not properly lead to auto-benching of user code
3083 - smpicc passes -O2 by default (just like openmpi one)
3085 * add SIMIX_action_suspend() and SIMIX_action_resume() functions
3086 * Bug fixes about timeouts during communications
3087 * add SIMIX_message_sizes_output() as a pimple to write to file the
3088 amount of messages per size. Use gnuplot to get histogram.
3089 Pimple because that's the only user-visible function of simix,
3090 defined directly in xbt.h (irk, sorry)
3092 - Add a SIMIX_sem_get_capacity() function
3093 - Fix interactions with processe resume/suspende
3094 - release_forever() was stupidly broken
3095 - Fix SIMIX_display_process_status() for processes in a semaphore
3096 - Make SIMIX_sem_block_onto() user-visible
3097 * Refactoring context stuff:
3098 - Use pseudo-OOP for better modularity
3099 - reimplement SIMIX_process_kill() without process_schedule() so
3100 that the latter can take as invariant that it is called from
3102 - Merge context_start into context_new for sake of simplicity
3104 * Add a Vivaldi network model, coded live during SUD'10 ;)
3105 * Rename configuration variables to start a hierarchy:
3106 o cpu_model -> cpu/model
3107 o network_model -> network/model
3108 o workstation_model -> workstation/model
3109 * New configuration variables:
3110 o network/bandwidth_factor: correction to bandwidth
3111 o network/latency_factor: correction to latency
3112 o netwotk/weight_S: correction to the weight of competing streams
3113 * Add a long description to the models, that users can see with such
3114 argument on the command line: --cfg=cpu/model:help
3115 * --help-models display the long description of all known models
3117 * config: add the ability to set a default value after registration
3118 Does not override any previously set value (e.g. from cmd line)
3119 * dict: allow to have integer key and data.
3120 When so, you need to use the following functions
3121 void xbt_dicti_set(xbt_dict_t dict, uintptr_t key, uintptr_t data);
3122 uintptr_t xbt_dicti_get(xbt_dict_t dict, uintptr_t key);
3123 void xbt_dicti_remove(xbt_dict_t dict, uintptr_t key);
3124 In contrary to regular dicts, the key is not malloced before copy.
3125 Mixing scalar and regular elements in the same dict is not tested
3127 * Allow to use xbt_dynar_shrink() to expend the dynar instead
3128 Tracing for Visualization:
3129 * SimGrid is now instrumented in order to generate a trace file for
3130 visualization analysis: to use it, need to compile SimGrid with the
3131 "tracing" option enabled, and instrument the program using SimGrid with
3132 TRACE_start, TRACE_category, TRACE_msg_set_task_category and TRACE_end
3133 (among other functions).
3134 * The instrumentation only traces the platform utilization for now
3135 * Documentation to use the tracing functions and how to analyze the
3136 traces with the Triva tool is written.
3137 * More information about: SimGrid FAQ (in the section Tracing Simulations
3140 * We moved to cmake as default build system. Autotools support will
3141 be dropped soon. Check the FAQ for more info about how to use it.
3142 * Greatly improved our cdash/ctest interactions
3143 Check http://cdash.inria.fr/CDash/index.php?project=Simgrid
3144 * Added memory checking tests with valgrind; lot of memleak fixing.
3145 This may be the first release of simgrid with so few memory issues
3146 * Added code coverage tests.
3147 Our coverage is still improvable, but at least we see it on cdash.
3149 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Wed, 28 Apr 2010 28 17:11:16 +0100
3151 SimGrid (3.3.4) stable; urgency=low
3153 The "Desktop Grid needs love too" release (also called Xmas release).
3155 Models improvements:
3156 * Major speedup in the maxmin system solving by using lazy evaluation
3157 Instead of solving completely the maxmin system at each iteration,
3158 only invalidate (and recompute) the modified parts.
3159 This new feature is enabled in default models but you can try to
3160 turn it on with "--cfg:maxmin-selective-update=1" for other models.
3161 * Cas01 IMproved as default CPU model
3162 This CPU model is the same Cas01 model, but it uses the
3163 maxmin-selective-update flag and a heap structure to manage
3164 actions on SURF kernel.
3165 It reduces the complexity to find the next action to finish and,
3166 consequently, it's faster than the old Cas01.
3167 This is the new default CPU model (Cas01).
3168 * Rename the old Cas01 model to Cas01_fullupdate
3169 Keep the old cpu model Cas01 with the new name of Cas01_fullupdate.
3170 Use "--cfg=cpu_model:Cas01_fullupdate" to use the old default CPU model.
3171 * CpuTI (CPU Trace Integration)
3172 A new CPU model whose objective is simulate faster when using
3173 availability trace files.
3174 Instead of using a full featured, over engineered maxmin system for
3175 CPU modeling, this model does the pre-integration of traces files
3176 to calculate the amount of CPU power available, and so, executes
3177 faster than the old CPU models.
3178 Use "--cfg=cpu_model:CpuTI" to change to this CPU model.
3179 * Use LV08 as default network model since it gives better accuracy
3180 for small messages and shouldn't change things for big ones.
3181 Use --cfg=network_model:CM02 to get the previous behavior.
3184 ******************************************
3185 *DO NOT MIX 3.3.4 RESULTS WITH OLDER ONES*
3186 ******************************************
3187 * The new CPU model may changes simulations!
3188 The point is that events occurring at the exact same timestamp
3189 are not scheduled in the same order with the old and new
3190 version. This may be enough to completely change the execution
3191 of simulations in some cases.
3192 * The new network model will change simulations!
3193 This new model is more realistic than the previous one, so you
3194 should consider redoing your old experiments with this model.
3195 Sorry for the inconvenience.
3198 * Introduce the supernovae compilation mode
3199 When compiled that way, the whole SimGrid (or almost) is put in a
3200 single compilation unit and compiled in one shoot.
3201 This is to help gcc which has difficulties to inline stuff from one
3203 The speedup seem to be above 15%, althrough more tests are needed on
3204 amd64 to confirm that gain.
3207 * Port of MSG's mailbox on top of SIMIX network
3208 The put/get mechanism was greatly simplified on the way.
3211 * New SIMIX network module. Provides:
3212 - Mailbox: rendez-vous mechanism to find with who you want to speak
3213 - Synchronous send/recv: easier and hopefully faster since the
3214 logic is handled in the maestro process directly now
3215 - Asynchronous send/recv: you dreamt of it? It's here now
3216 Too bad that nobody cared enough to propagate the change to MSG.
3217 * Add semaphores as SIMIX synchronization mechanism.
3220 * new function SD_daxload(char*) to load a DAX file
3221 (see http://vtcpc.isi.edu/pegasus/index.php/WorkflowGenerator)
3222 * Introduce typed tasks. Specify its kind and cost at creation.
3223 At scheduling, just give where it should be placed, and the cost
3224 for each involved resource is automatically computed.
3225 Existing constructors so far (more to come of course):
3226 - SD_task_create_comm_e2e() for end-to-end communication
3227 - SD_task_create_comp_seq() for sequential computation
3228 Use SD_task_schedulev() / SD_task_schedulel() to schedule them.
3229 * new function SD_task_dump() for debugging display
3230 * new function SD_task_dotty(task,FILE*) writing to file the info
3231 about the task in dotty format
3232 * SD_task_dependency_exists() can now cope with having one of its
3233 arguments NULL. If so, it tests whether the other argument has any
3235 * Add getters on list of preceding/following tasks:
3236 SD_task_get_parents(task) and SD_task_get_children(task)
3237 * Add getters on amount of workstations and list:
3238 SD_task_get_workstation_count(t) and SD_task_get_workstation_list(t)
3239 * Add getter on task kind: SD_task_get_kind(task)
3240 * Update the start_time and finish_time of tasks on completion/failure
3241 * Bugfix: Remove task from state swags when destroyed
3244 * New function: void gras_cpu_burn(double flops) -- a simple CPU burner
3247 * New function: xbt_dynar_dopar(dynar,fun) to map a function over the
3248 dynar with one separate thread per value of the dynar.
3249 * Change the prototype of xbt_thread_create(), sorry.
3250 Added a boolean parameter indicating whether we want to join this
3251 thread (used in SG only for now)
3252 * Implement xbt_thread_join and xbt_thread_yield in SG also.
3255 * GTNetS wrappers should now be usable again (and betterly tested too)
3256 * Fix a major regression from 3.2 where the timeout provided to
3257 MSG_task_put_with_timeout() was used as absolute time before which
3258 the comm should be done.
3259 * Start to fix the <cluster> tag.
3260 - Internal links should be good now (beside of the loopback, which
3261 use the private link instead)
3262 - paths to the external world is still rather broken
3263 - the <route:multi> tag is just broken. Actually that's brain-dead.
3264 We need sth like <route:multi src="myCluster" dst="$*-${myCluster}">
3265 to make it less stupid
3266 ** Check your platform with teshsuite/simdag/platforms/flatifier **
3267 * Fix a source-level compatibility glitch from 3.2: after defining
3268 MSG_USE_DEPRECATED, you can use the old name
3269 MSG_task_put_with_time_out() for MSG_task_put_with_timeout()
3270 * Allow to compile from the SVN with automake 1.11
3271 * Fix some problems when using the "start_time" tag in deployment XMLs.
3272 * Fix #8569: XBT/synchro.h has redundant declarations
3273 * Fix #8563: MSG return values and exceptions
3274 Introduce a MSG_TIMEOUT_FAILURE return code and use it consistently.
3275 * Integrate patch #8636: Obey DESTDIR when installing documentation.
3276 Thanks to Robson Peixoto.
3277 * Fix a vicious bug in dictionaries inducing that some elements were
3278 not freed on xbt_dict_free()
3280 Portability report of this version:
3281 * Main portability targets:
3282 - linux (ubuntu (804/810/910) /debian (4/5/testing) /fedora (core11))
3283 on (amd64/i386/ia64)
3284 - mac leopard on i386
3285 Known problems: http://cdash.inria.fr/CDash/index.php?project=Simgrid
3286 but nothing critical.
3287 * Other platforms: windows, AIX and others were not tested for this release
3289 Timing report of this version:
3290 * Lazy evaluation brings arbitrary speedup (ie, speedup depending on
3291 scenario parameters). From 8h to a few seconds in desktop grid settings.
3292 * Supernovae brings about 25% speedup on i386.
3294 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 24 Dec 2009 19:07:39 +0100
3296 SimGrid (3.3.3) stable; urgency=low
3298 The "Need for Speed" release.
3300 The timings done to validate the 3.3.2 were faulty.
3301 Instead of being 5% faster, it was 15% slower (compared to 3.3.1).
3303 The problem was a conversion from a manually handled vector to
3304 xbt_dynar_t on the critical path.
3305 xbt_dynar_foreach calls functions, inducing stack management crap.
3307 We inlined these functions and xbt_dynar_foreach is now breath taking.
3308 We also inlined xbt_swag_belong on the way.
3310 Here are some approximate speedup measurements (on master/slaves
3311 simulations lasting between 10s and 20s each):
3312 3.3.1 -> 3.3.2: about same performance
3313 3.3.2 -> 3.3.3: 40% speedup
3314 3.3.1 -> 3.3.3: 40% speedup
3315 3.3.1 with inline patch -> 3.3.3: 30% speedup
3317 Our reading is that the refactoring which occurred in 3.3.2 made us
3318 suffer much more from the xbt_dynar_foreach low performance, but
3319 once we solved this, this refactoring proved to be very performance
3320 effective. From the 40% speedup, somehow, 10% are due to the
3321 inlining and 30% to the refactoring.
3323 That's a pitty that gcc cannot inline functions placed in other files
3324 alone. We have to choose between:
3325 - break the encapsulation (by putting private data structures and
3326 accessors in headers files to help gcc)
3327 - live with low performance
3328 - switch to a decent compiler such as icc (not quite possible).
3330 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 20 Aug 2009 21:21:33 +0200
3332 SimGrid (3.3.2) stable; urgency=low
3334 The "Simplicity does not preceed complexity, but follows it" release.
3336 The main contributors of this release were (lexical order):
3337 Silas De Munck, Stéphane Genaud, Martin Quinson, Cristian Rosa.
3340 * Extract the routing logic into its own object.
3341 (was dupplicated in network.c and workstation_LV07.c;
3342 Allows to implement other ways of storing that info)
3343 => kill now useless network_card concept
3344 - Use dynar to represent routes (instead of void** + int*)
3345 - kill link_set (use surf_network_model->resource_set instead)
3346 - Add a command-line option to choose the routing schema to use
3347 - Add three new models:
3348 * Floyd (shortest path computed at initialization)
3349 * Dijikstra (shortest path recomputed all the time)
3350 * Cached Dijikstra (shortest path computed on need)
3351 All these models where contributed by Silas De Munck, and are
3352 described in his ICCS09 paper.
3354 * Simplify model declaration
3355 (less redirections, less function to write when defining a model)
3356 - Factorize stuff between models:
3359 surf_model_resource_set(model)
3360 surf_model_resource_by_name(model, name)
3361 - Unify the types of models in s_surf_model_t (using an union)
3362 - Embeed fields of common_public directly into s_surf_model_t
3363 - Rename model methods:
3364 action_free ~> action_unref
3365 action_change_state ~> action_state_set
3366 action_get_state ~> action_state_get
3367 - Change model methods into functions:
3368 (model)->common_public->action_use ~> surf_action_ref
3370 * Implement a generic resource; use it as ancestor to specific ones
3371 (allows to kill duplicated code in models)
3372 Drawback: timer command don't need no name nor properties;
3373 workstation_CLM03 don't need no properties
3374 (but I guess we can live with those few bytes wasted)
3376 * Improve the action object model
3377 - implement a constructor avoiding dupplicated code about field
3378 initialization in generic_action part.
3380 * Kill the SDP model: it has an external dependency, is deprecated
3381 in flavor of modern lmm models, and didn't compile since a while
3384 * Relocation of the context module from XBT to SIMIX.
3385 (the context were decoupled from the simix processes, duplicating a lot of code)
3386 => a lot of code was factorized
3387 - less overhead is introduced during scheduling
3388 - simpler API for the context factory
3389 - the logic for process creation,destruction and manipulation was simplified
3390 * Simplification of the s_smx_process_t data structure.
3391 => accesing the simix level data associated to a process is faster now,
3392 and the code is a lot more readable.
3395 * Implement some more MPI primitives:
3396 MPI_Bcast, MPI_Waitany, MPI_Waitall, MPI_Reduce, MPI_Allreduce, MPI_Scatter, MPI_Sendrecv, MPI_Alltoall
3397 -implementation: Bcast: flat or 2-ary tree (default),
3398 Barrier: 4-ary tree,
3400 Allreduce: Reduce then Bcast
3401 Alltoall: "basic_linear" if data per proc < 3Kb, "otherwise pairwise".
3402 Not yet implemented: "Bruck" for data per proc < 200b and comm size > 12
3403 Alltoallv: flat tree, like ompi
3405 * Add support for optimized collectives (Bcast is now binomial by default)
3406 * Port smpirun and smpicc to OS X
3409 * Kill SD_link_get_properties: hard to maintain and makes very little sense
3410 Shout out if you used it.
3413 * Display the list of still queued messages in SG mode when existing
3417 * Add xbt_set_get_by_name_or_null() [Silas De Munck]
3418 * Add xbt_graph_node_get_outedges() [Silas De Munck]
3419 * Add xbt_str_from_file(FILE*)
3420 * Add xbt_dict_get_key achieving a linear reverse search
3421 * Remove the context module
3423 Portability report of this version:
3424 * Main portability targets:
3425 - Linux(debian)/x86/context
3426 - Linux(debian)/x86/pthreads
3427 - Linux(debian)/amd64/context
3428 - Linux(debian)/amd64/pthreads
3429 On these, we still have the eratic breakages of gras/pmm and
3430 amok/saturate_sg reported in previous version. We still think
3431 that the tests are the cause of the fault, not the tested code.
3433 - Mac OSX Leopard/x86/context
3434 Still false negative in tesh autotesting.
3435 Smpi still fails, but this time because readlink does not accept -f
3436 Everything seems to work properly beside of that.
3439 - AIX version 5.3 (only tested contexts this time)
3440 Smpi still fails there because mktemp is not installed.
3441 Everything seems to work properly beside of that.
3443 I managed to compile it for the first time, but several breakages.
3444 Won't delay the release for this exotic platform.
3446 * Windows: it's still lagging behind. If you want to help, please
3449 Timing report of this version:
3450 This version seem to be more than 5% faster than 3.3.1 (on linux
3451 64bits with contextes). The gain is less than expected, we are
3452 investigating this for next release.
3454 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Wed, 19 Aug 2009 17:07:12 +0200
3456 SimGrid (3.3.1) stable; urgency=low
3459 * Implement a --cfg-help to show existing configuration variables
3460 * Build chain do not require doxygen in maintainer mode
3463 * fix a bug on struct sizeof computation, which prevented the
3464 exchange of arrays of structs in some conditions
3465 - added a regression test about this in datadesc_usage
3466 * Allow the exchange of 0-long dynamic vectors.
3467 - for that, use -1 as indicator of dynamic size instead of 0
3468 - This implied to change any size from unsigned long to long,
3469 reducing a bit communication abilities, but I guess that with
3470 64bits being quite common, this is more than enough.
3471 - This also induce a protocol change, thus bumping network protocol
3472 version from 0 to 1 (if we have external users, we have to get
3473 clean on that point too ;)
3474 - added two regression tests about this in datadesc_usage
3475 * Be more verbose when propagating local exceptions
3476 This helps debugging.
3477 * Display the status of simulated processes when receiving SIGINT in
3481 * Allow to control the simulation from a trace file.
3482 New functions MSG_action_register() and MSG_action_trace_run()
3483 The first one allows to associate a function execution to each
3484 kind of action while the second one parses a trace file and
3485 triggers the corresponding actions within the system.
3486 For now, only a toy example is provided in examples/msg/actions
3487 * Add an example of process migration in examples/msg/migration
3488 * Fix a bug in task exchange which broke MSG_task_get_sender()
3489 Add a teshsuite regression test for that.
3490 [Bug: if MSG_task_get_sender() is called after sender exit,
3492 * Fix a bug which prevented suspend/resume to work properly
3493 * Display the status of simulated processes when receiving SIGINT
3494 This fixes a regression of v3.3. due to the introduction of SIMIX
3495 * Bug fixing in failure management:
3496 - trace could not start by a failure at time 0
3497 - failure during communications were not working
3500 * Add SIMIX_process_set_name() to change the name of the current
3501 process in the log messages.
3502 * Store smx_hosts in a dict since we only retrieve them by name
3503 * Move the configuration infrastructure to surf
3506 * Move the configuration infrastructure to surf
3509 * Massive internal cleanups:
3510 - Store internal structures on processes instead of hosts (allows
3511 to have more than one process per host, in addition of being more
3513 - Cleanup the initialization/finalization process
3514 - Kill a whole bunch of unneeded synchronization:
3515 processes run in exclusive manner within the simulator
3516 - Move queues from global tables to process data fields
3518 - now accept -platform and -hostfile arguments
3519 - Pass the right rank value to processes according to the hostfile
3520 * Compile the examples by default, and use them as regression tests
3521 * Implement MPI_Wtime()
3522 * Change the reference speed to a command line option
3525 * TCP_gamma can now be specified as command line option using
3526 --cfg=TCP_gamma:10000000.0
3527 * Change the --surf-path cmd line option into --cfg=path:
3530 * Also include strbuff from xbt.h public header
3531 * xbt_ex_display(): do not free the exception after displaying
3532 This allows to do more with the given exception afterward.
3533 Users should call xbt_ex_free() themselves.
3537 Portability report of this version:
3538 * Main portability targets:
3539 - Linux(debian)/x86/context
3540 - Linux(debian)/x86/pthreads
3541 - Linux(debian)/amd64/context
3542 - Linux(debian)/amd64/pthreads
3543 These targets fail about 1/10 of times on gras/pmm, but we believe
3544 that this is because of the test, not because of simgrid.
3545 amok/saturate_sg fails even more rarely, and the test may not be
3548 - Mac OSX Leopard/x86/context
3549 The test suite still spits tons of errors because some obscure
3550 force prevents us from removing the temporary directories
3551 arguing that they still contain some metadata I've never heard of.
3552 Smpi fails because seq is not installed.
3553 Everything seems to work properly beside of that.
3556 - AIX version 5.3 (both contexts and pthread)
3557 Smpi still fails there because mktemp is not installed.
3558 XML inclusions seems rosty on AIX.
3560 * Windows: it's still lagging behind. If you want to help, please
3563 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Sat, 27 Jun 2009 00:14:30 +0200
3565 SimGrid (3.3) stable; urgency=high
3569 * JAVA BINDINGS for MSG (you dreamt of them? We made them)
3570 [Malek Cherier & Mt]
3572 * Introduce the SIMIX module: factorize code between MSG and GRAS.
3575 Until now, GRAS were using MSG as an interface to SURF. It was
3576 quite difficult because both interface have several differences
3577 (MSG channels vs GRAS sockets were the most notable point).
3579 This also opens the gate to SMPI (which should occur soon) and speed
3580 up simulations by to 40% (even if it were not the main goal).
3582 **************************************
3583 *DO NOT MIX 3.2 RESULTS WITH 3.3 ONES* Simix may changes simulations!
3584 **************************************
3585 The point is that events occurring at the exact same timestamp are
3586 not scheduled in the same order with the old and new version. This
3587 may be enough to completely change the execution of simulations in
3588 some cases. Sorry for the inconvenience.
3590 * Cleanup and upgrade the XML format to push further scalability
3591 issues (check http://hal.inria.fr/inria-00256883/ for more info)
3593 * Improve the testing infrastructure with tesh. Now a very large part of
3594 the code is tested not only by being run but also by checking that the
3595 output match an expected output [Mt].
3597 * Move on to FleXML v1.7 for the embeeded XML parsers. This version
3598 is really less memory-demanding, which should allow you to use
3599 larger files in SimGrid [AL].
3601 * Inform valgrind about our contextes, so that it becomes usable
3602 with the default (and more effecient) version of SimGrid
3603 [contributed by Sékou Diakite, many thanks]
3606 * Introduce a listener thread in charge of receiving incoming
3607 messages from the network. It allows to overlap communication and
3608 computation but most notably, it removes some stupid deadlocks due
3609 to the fact that so far, a process could not send and receive at
3610 the same time. This made most non trivial communication schema
3612 * Convert the PIDs from long int to int to match the MSG ones (and
3613 linux ones too) [Mt]
3614 * New function: gras_agent_spawn() to launch a new process on
3615 current host. Only working in simulation for now. [Mt]
3616 * New function: gras_os_hostport() returning a constant form (ie,
3617 not needing to be freed) of "gras_os_hostname():gras_os_myport()"
3620 * Make the backtrace of exceptions more human readable [Mt]
3621 * New module: xbt/str [Mt]
3622 a ton of string utility functions (split, join, printf to a newly
3623 allocated buffer, trim, etc)
3624 * New module: xbt/hash [Mt]
3625 SHA1 hashing algorithm (more to come if needed)
3626 * New module: xbt/synchro [Mt]
3627 synchronization tools (mutex and conditions) working the same way
3628 in simulation and in real life (mainly useful for GRAS, but not
3630 * New module: xbt/queue [Mt]
3631 classical producer/consumer synchronization scheme
3632 * xbt_dynar_new_sync() creates a synchronized dynar. All access
3633 (using the classical functions will get serialized) [Mt]
3634 * Make dictionary internal table dynamic. No need to specify its size
3635 anymore; functions xbt_dict_new_ext() and xbt_dict_hashsize_set()
3637 * Make sure the log channels are organized as a tree under windows
3638 (because of ANSI C compatibility issue, any channel were child of
3639 root directly) [Mt].
3642 * Cleaned many thing in surf and fixed a few bugs [AL].
3643 * Add a nice command line configuration mechanism to compose models [AL].
3644 * Add a new model for parallel tasks (ptask_L07) that is less buggy than
3645 the previous one (KCCFLN05). It relies on something that looks like
3646 a max-min sharing mechanism but cannot be written as such. A new solver
3647 was thus designed [AL].
3648 * Add a new solver to lmm. Based on Lagrange optimization and
3649 gradient-based descent, it enables to efficiently maximise systems s.a
3651 sum f_i(x_i) s.t Ax<= b with A_{i,j}>=0 and f_i a concave function.
3653 This solver enables to propose two new network models for TCP Reno and
3654 TCP Vegas based on Low's work. These models still need to be fully
3655 tested though [Pedro Velho].
3658 * Bug fix in SD_simulate. Now the time bound given as argument is
3660 * Use the new parallel task model (ptask_L07) as default.
3661 * Use the SURF command line configuration mechanism.
3662 * 0-size tasks (for synchronization) should now work.
3664 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Sun Apr 12 05:20:36 CEST 2009
3666 SimGrid (3.2) stable; urgency=high
3670 We still experience issues on this platform, but we believe that at
3671 least MSG is usable.
3673 GRAS API BREAKAGE (for simplification purpose, sorry):
3674 * the gras_msgtype_by_name is not used anymore. Instead of
3675 gras_msg_send(toserver, gras_msgtype_by_name("request"), &request);
3676 you can write (and must)
3677 gras_msg_send(toserver, "request", &request);
3678 - If you still want to pass a gras_msgtype_t to the function (to cache
3679 the type and avoid the lookup time), use the gras_msg_send_() variant.
3680 - Impacted functions:
3681 gras_cb_register, gras_cb_unregister, gras_msg_send, gras_msg_wait,
3682 gras_msg_rpccall, gras_msg_rpc_async_call, gras_msg_wait_ext
3683 * The callbacks are now expected to return 0 when everything went well
3684 (just like the main() function)
3686 GRAS new features and improvements:
3687 * New module mechanism where user code can use per process globals [Mt]
3688 This is similar to gras_userdata_*() functions, but for libraries. It
3689 factorize some code developped over and over in the examples and AMOK.
3690 It has still to be documented and used (only amok/peermanagement is
3692 * Fix a vicious bug in the TCP buffering mechanism which leaded to message
3693 loss when they were small enough to fit into the buffer and sent quickly
3694 enough so that they can all get received in one shoot.
3695 * gras_datadesc_by_name and gras_msgtype_by_name: now raise an exception
3696 if not found. Use the *_or_null() variant for the old semantic.
3697 * In gras_msg_handle, do not discard messages without callback.
3698 They are probably messages to be explicitly awaited later (ie, proofs of
3699 mis-synchronization in userland since they are sent before being awaited)
3700 No big deal usually.
3701 * gras_socket_meas_send/recv: semantic changed!
3702 The numerical arguments used to be (1) the total amount of data to send
3703 and (2) msg_size. This was changed to (1) msg_size and (2) amount of
3704 messages. This was need for the fool willing to send more than MAXINT
3705 bytes on quite fat pipes.
3708 * Do really rename the hostmanagement module to peermanagement. [Mt]
3709 Ie, rename functions from amok_hm_* to amok_pm_*. This breaks the API,
3710 but this is rather new and this was documented in the module
3711 documentation (poor excuses, I admit)
3712 * Bandwidth measurement semantic changed! This follows the changes to
3713 gras_socket_meas_send/recv explained above.
3716 * A sequential mode has been added to the workstations. When a workstation
3717 is in sequential mode, it can execute only one task, and the other tasks
3718 are waiting in a FIFO. [Christophe Thiery]
3721 * The KCCFLN05 workstation model now handles parallel tasks. It is the
3722 model for SIMDAG. [Christophe Thiery]
3723 * Bug fix in the maxmin solver: Some values were close to 0 instead of
3724 equal to 0, which caused some bad behaviors in
3725 saturated_constraint_set_update. I now use a threshold mechanism like in
3729 * When running manually src/testall, you select specific units [Mt]
3730 testall is the result of our cunit mechanism, and should replace all
3731 the scripty thingy around since bash don't run easily on billware.
3733 * A mallocator system has been added. [Christophe Thiery]
3734 Mallocators allow you to recycle your unused objects instead of freeing them
3735 and allocating new ones.
3737 Documentation update:
3738 * FAQ reworking + New FAQs:
3739 - "Valgrind spits tons of errors!" [Mt]
3740 - "How to repport bugs" [Mt]
3741 - "Cross-compiling a Windows DLL of SimGrid from Linux" [Mt]
3742 - "What is the difference between MSG, SimDag, and GRAS?" [Mt]
3743 - Communication time measurement within MSG [AL]
3744 - I experience weird communication times when I change the latency [AL]
3745 * GRAS tutorial [Mt]
3747 - an introduction to the framework and to the used communication model
3748 - an initiatic tour introducing the most proheminent features:
3750 . Lesson 0: Installing GRAS
3751 . Lesson 1: Setting up your own project
3752 o Part 2: Message passing
3753 . Lesson 2: Exchanging simple messages
3754 . Lesson 3: Passing arguments to the processes (in SG)
3755 . Lesson 4: Attaching callbacks to messages
3756 . Lesson 5: Using globals in processes
3757 . Lesson 6: Logging information properly
3758 . Lesson 7: Using internal timers
3759 . Lesson 8: Handling errors through exceptions
3760 . Lesson 9: Exchanging simple data
3761 . Lesson 10: Remote Procedure Calling (RPC)
3762 . Lesson 11: Explicitly waiting for messages
3763 . Recapping of message passing features in GRAS
3764 - A HOWTO section containing:
3765 o HOWTO design a GRAS application
3766 More are due, of course. They will come latter. In the meanwhile, you can
3767 check the examples which are still here.
3769 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri Mar 16 21:11:46 CET 2007
3771 SimGrid (3.1) stable; urgency=high
3775 There was a stack corruption somewhere, visible only when optimizing
3776 with these versions. [Vince]
3779 * This is a NEW module! SimDAG (SD for short) is a revival of the old SG
3780 module that enabled to play with Directed Acyclic Graphs. It is built
3781 directly on top of SURF and provides an API rather close to the old
3782 SG. Some old codes using SG are currently under rewrite to check that
3783 all needful functions are provided. [Christophe Thiery]
3786 * Complete rewrite of the KCCFLN05 workstation model. It is now an
3787 extension of the classical CLM03 model that gracefully handles
3788 failures. This is now the default model for MSG and GRAS. It doesn't
3789 handle parallel tasks yet though. [AL]
3790 * Bug fix: Weights were not correctly set in the network part.
3791 WARNING: This may have resulted in incorrect results with simulations
3792 where there are more than one flow on a given link. [AL]
3795 * After a (long ?) discussion on simgrid-devel, we have decided that the
3796 convention we had on units was stupid. That is why it has been decided
3797 to move from (MBits, MFlops, seconds) to (Bits, Flops, seconds).
3798 WARNING: This means that all previous platform files will not work as
3799 such with this version! A warning is issued to ask users to update
3801 A conversion script can be found in the contrib module of the CVS, under
3802 the name contrib/platform_generation/surfxml_update.pl [MQ]
3805 * Bug fix: Processes were started in reverse order, wrt deployment file.
3806 WARNING: if your code relies on this bug, please fix it. [AL]
3807 * Bug fix: Add a test in MSG_task_execute to stop whenever a task is
3808 being executed on two different locations. [AL]
3809 * Bug fix: Failures are now better supported thanks to Derrick's tests
3810 (there was many failure situations I hadn't thought of and that weren't
3811 correctly handled). [AL]
3812 * New function: MSG_host_is_avail indicates you whether a given m_host_t
3816 * New! a real RPC mechanism, as it ought to be since too long. [MQ]
3817 Exception occurring on server-side are propagated back to client (!).
3819 API CHANGE: the callback changed their prototype. Change:
3820 int my_handler(gras_socket_t expeditor, void *payload_data) {
3822 int my_handler(gras_msg_cb_ctx_t ctx , void *payload_data) {
3823 gras_socket_t expeditor=gras_msg_cb_ctx_from(ctx);
3825 * New! function: gras_msg_handleall to deal with all messages arriving
3826 within a given period.
3827 * New! function: gras_socket_server_range to get a server socket in a
3828 range of port numbers (ease to avoid port number conflicts) [MQ]
3829 * New! gras processes display their backtrace when they get a SIGUSR1
3830 or when Ctrl-C is pressed. Use Ctrl-C Ctrl-C to exit.
3831 Sweet to debug RL processes [MQ]
3835 - Do not force experiment sizes to be expressed in kb, or it becomes
3836 impossible to measure the latency this way (needs one byte-long tests)
3837 WARNING: this changes the amok_bw_* function semantic. [MQ]
3838 - Implements the link saturation stuff. [MQ]
3839 * Peer management module:
3840 New! module factorizing code that we wrote over and over [MQ].
3843 * New module: cunit (my jUnit implementation in ansi C) [MQ]
3844 - Test units are placed directly into the library code, they get extracted
3845 automatically and placed into the src/testall binary.
3846 - Convert most of the XBT tests to this system.
3847 * New functions: xbt_dynar_getfirst_as() and xbt_dynar_getlast_as() [MQ]
3848 * XML parsing: rewrote parts of flexml to enable multiple xml parsers to
3849 live in the same C code. This required to change a little bit the API
3850 of surfxml parsing but shouldn't be an issue for end-users. [AL]
3851 * New module: sparse graph structure with basic algorithms (this is work
3852 in progress and the API is not considered to be frozen yet). [AL]
3853 * Display more information on backtraces: source line & function names are
3854 now displayed just like valgrind does (rely on addr2line tool) [MQ]
3855 * New function: xbt_backtrace_display(). Sweet while debugging [MQ]
3856 * Reworked a little bit some #include statements to load only required
3857 headers. Some user code that relied on SimGrid to include stdlib or
3858 stdio may need to include it by themselves. [AL]
3859 * Fixed xbt/log.h. A missing SG_BEGIN_DECL prevented compilation with
3861 * Renamed xbt_host_t into xbt_peer_t since it betterly describes what I
3862 meant. This breaks the API of AMOK and of xbt/config. Sorry about this,
3863 but I guess that almost nobody used those parts. [MQ]
3865 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 14 Jul 2006 01:32:27 +0200
3867 SimGrid (3.0.1) stable; urgency=low
3870 * Unfortunately, I had missed 5 misnamed functions:
3871 xbt_fifo_item_t xbt_fifo_newitem(void);
3872 void xbt_fifo_freeitem(xbt_fifo_item_t);
3873 xbt_fifo_item_t xbt_fifo_getFirstItem(xbt_fifo_t l);
3874 xbt_fifo_item_t xbt_fifo_getNextItem(xbt_fifo_item_t i);
3875 xbt_fifo_item_t xbt_fifo_getPrevItem(xbt_fifo_item_t i);
3876 They're now deprecated. Please use their new versions:
3877 xbt_fifo_item_t xbt_fifo_new_item(void);
3878 void xbt_fifo_free_item(xbt_fifo_item_t);
3879 xbt_fifo_item_t xbt_fifo_get_first_item(xbt_fifo_t l);
3880 xbt_fifo_item_t xbt_fifo_get_next_item(xbt_fifo_item_t i);
3881 xbt_fifo_item_t xbt_fifo_get_prev_item(xbt_fifo_item_t i);
3883 * Bugfix: really disconnect fifo items which are remove_item()ed [AL]
3884 * Documentation: xbt_log module unmercifully reworked [MQ]
3885 * Bugfix: there was a problem with the ending of contexts with
3886 the pthread backend. It caused some weird deadlock or behavior
3887 depending on the pthread implementation. [AL]
3888 * Bugfix: get the exceptions raised in the simulator repport where
3889 and why they come from when they are not caught in time [AL, MQ]
3892 * Bugfix: Do repport the error when two non-connected hosts try to
3893 exchange data (Thanks to Flavien for stumbling into this one) [AL]
3896 * Add additionnal checkings on communications. Assert that two
3897 communicating hosts are connected by a set of links... [AL]
3900 * Add additionnal checkings on channel values in communication [AL]
3901 * New: MSG_task_get_source to see on which host a task was generated [HC]
3902 * New: int MSG_task_probe_from_host(int channel, m_host_t host): returns
3903 the number of tasks waiting to be received on channel and sent
3905 * New: MSG_error_t MSG_task_get_from_host(m_task_t * task, int channel, m_host_t host);
3906 waits for the first task coming from a given host.. [AL]
3908 GRAS new functionnalities: [MQ]
3909 * Enhance the parsing macro to allow the size of multidimentional objects
3910 to be given thru annotations.
3911 * New example (and documentation): Matrix Multiplication a la RPC
3912 (as when I was young!) and fix a bunch of bugs found on the way.
3914 GRAS performance improvements: [MQ]
3916 * Reduce the amount of cbps creation/destruction by making it static to
3917 datadesc_send/recv() and using a (newly created) cbps_reset (based on
3920 * Change libdata to a set so that we can search for stuff by ID (and thus
3921 reduce the insane amount of dict lookups)
3924 * Actually implement gras_datadesc_copy() so that we don't have to mimick
3925 RL communication on top of SG since it's so uneffective.
3926 It may also be used for inter-thread communication in RL, one day.
3927 * Use gras_datadesc_copy() to exchange messages on top of SG
3929 - improve message exchange performance on top of SG
3930 - deprecate transport_plugin_sg.c:gras_trp_sg_chunk_send() & recv()
3931 * Don't exchange on the network the size of the used part of buffer,
3932 instead, specify the possible buffer size to read().
3934 - reduces the amount of read/write calls (one pair per exchange)
3935 - reduces the amount of exchanged data (the size)
3936 - allows to retrieve all arrived data on receiver side, if we don't need
3937 it right now (subsequent read will peek the buffer)
3938 - allows the receiver to proceed with the beginning of the stream before
3939 everything is arrived
3940 - make it possible to build an iov transport (using readv/writev)
3942 - take care of the data with non-stable storage (like stacked data),
3944 * If possible, TCP send uses vector I/O (when writev() is here)
3945 - Don't use it for receive since we send data sizes and data on the
3946 same stream, so we wouldn't be able to chain large amount of chunks
3947 before having to flush the stuff to read the size.
3948 * Rework the transport plugin mechanism to simplify it and reduce the
3949 amount of pointer dereferencement when searching for the right function
3952 * I guess that now, we do almost as few system calls as possible while
3953 doing as few data copy as possible.
3955 To improve it further, we could try to send all the sizes first and then
3956 all the data (to use iov on receiving size), but it's only a partial
3957 solution: when you have 2 dimensional data, the sizes of the second
3958 dimension is data of the first dimension, so you need 3 streams.
3960 I'm not sure the potential performance gains justify the coding burden.
3962 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 21 Oct 2005 14:42:20 +0200
3964 SimGrid (3.00) stable; urgency=high
3967 * New! Give the possibility to hijack the surf parser and thus bypass
3968 MSG_create_environment and MSG_launch_application. Have a look at
3969 examples/msg/msg_test_surfxml_bypassed.c to see how it can be done.
3971 -- Arnaud Legrand <simgrid-devel@lists.gforge.inria.fr> Sat, 20 Aug 2005 23:25:25 -0700
3973 SimGrid (2.96) unstable; urgency=low
3978 * New! Exception handling with setjmp or such (code from OSSP ex) [MQ]
3979 This deprecates the xbt_error_t mechanisms.
3980 It modifies (simplifies) all XBT and GRAS API.
3981 MSG API keeps unchanged (exceptions raised by XBT are caught from
3982 within MSG and masked with existing error handling facilities)
3985 * New! Add a FATPIPE model. [AL]
3986 * New! Add a parallel task model. [AL]
3987 * New! Add automatically a loopback interface (in the default
3988 network model) if none was precised.
3991 * Bugfix: MSG_process_resume now works with the current running process.
3993 * New! Add MSG_parallel_task_create and MSG_parallel_task_execute. [AL]
3994 * Modification of MSG_task_get_compute_duration. Once a task has been
3995 processed, the value returned by this function is now equal to 0. [AL]
3996 * New! Add double MSG_task_get_remaining_computation(m_task_t task) and
3997 MSG_error_t MSG_task_cancel(m_task_t task). Add a state
3998 (MSG_TASK_CANCELLED) to MSG_error_t corresponding to the cancelation
3999 of a m_task. For now, MSG_task_cancel only works with computation
4001 * New! Add double MSG_get_host_speed(m_host_t h) that returns the speed
4002 of the processor (in Mflop/s) regardless of the current load on the
4004 * API Change: use proper naming convention for MSG_getClock and
4005 MSG_process_isSuspended: MSG_get_clock and MSG_process_is_suspended.
4007 * New! Add void MSG_task_set_priority(m_task_t task, double priority).
4008 This function changes the priority of a computation task. This priority
4009 doesn't affect the transfer rate. A priority of 2 will make a task
4010 receive two times more cpu power than the other ones. This function
4011 has been added to suit the needs of Nguyen The Loc and hasn't been that
4012 much tested yet. So if it fails, please report it and send me your code.
4014 * API Change: removed all functions and types that were marked "deprecated"
4015 since many months. Renamed MSG_global_init_args to MSG_global_init.
4017 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Mon, 8 Aug 2005 17:58:47 -0700
4019 SimGrid (2.95) unstable; urgency=low
4022 * Steal some nice code to GNU pth to fix context detection and usage [AL]
4023 * Cleanup in the xbt_config API; add configuration callbacks. [MQ]
4024 * Cleanup in the initialization API: the unused "defaultlog" is dead. [MQ]
4027 * Bugfix: Allow absolute paths for platform description files [MQ]
4028 * Bugfix: do free the variables after use. Leads to drastic performance
4030 * Implement max_duration (ie, timeouts) on resources [AL]
4033 * Implement MSG_config to configure MSG at runtime. xbt_cfg test on a real
4035 * Implement MSG_channel_select_from() to help GRAS now that SURF provide
4036 the needed support (timeouts) [AL]
4039 * Implement measurement sockets. You can now get the bandwidth between two
4040 hosts thanks to AMOK (see below). [MQ]
4041 * gras_datadesc_dynar() builds a dynar type descriptor, allowing to send
4042 dynar over the network (yeah) [MQ]
4043 * Real (even if simplistic) implementation of gras_os_myname() on RL [MQ]
4044 * simple/static token-ring example. [Alexandre Colucci and MQ]
4045 * Use MSG_channel_select_from() and remove the *slow* hack we had to put
4046 in place before [MQ]
4049 * Differentiate the types "char[22]" and "unsigned char[22]" in automatic
4050 type parsing. "short" and "long" modifiers were also ignored; other
4051 modifier (such as reference level) are still ignored. [MQ]
4052 * Embeed the buffer size within the buffer itself on SG. [MQ]
4053 That way, send() are atomic and cannot get intermixed anymore (at least
4054 the ones which are less than 100k; bigger messages still have the issue)
4055 * Array size pushed by the field, not by the field type (or each
4056 and every long int will push stuff to the cbps) [MQ]
4057 * use select() to sleep since it allows to portably sleep less than one
4060 GRAS (minor cleanups)
4061 * <project>.Makefile.local (generated from gras_stub_generator) |MQ]:
4064 * Type Callbacks now receive the gras_datadesc_type_t they work on as argument.
4065 * type category 'ignored' killed as it was never used and were difficult
4067 * whether a type can cycle or not is now a flag, leaving room for more
4068 flags (as "ignored", if we feel the need one day ;)
4069 * Rename raw sockets to measurement sockets since "raw" has another
4070 meaning in networking community.
4073 * Advanced Metacomputing Overlay Kit introduction. It is based over GRAS
4074 and offers features not belonging to GRAS but that most applications
4075 need. One day, it may be a set of plugins loadable at runtime.
4076 * New module: bandwidth
4077 bandwidth measurement between arbitrary nodes running this module. [MQ]
4079 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 30 Jun 2005 16:29:20 -0700
4081 SimGrid (2.94) unstable; urgency=low
4083 The first beta release of SimGrid 3 !
4087 * Update the main page and the FAQ. Adding references to gforge.
4090 * Add a gras_os_getpid function.
4093 * Add MSG_task_get_compute_duration() and MSG_task_get_data_size()
4094 * Extend the logs so that they also print PID, hostname, date, ... if
4096 * Convert the MSG example to the use of xbt_logs instead of PRINT_MESSAGE,
4097 and kill the old version which were in testsuite/
4098 * Rewrite tools/MSG_visualization/colorize.pl for using with logs instead
4102 * Add xbt_os_time(). As the rest of xbt/portability, this is not public
4103 for users. Instead, each programming environment (GRAS, MSG,...) use it
4104 when needed to provide such a feature to users.
4105 Don't shortcut the mechanism or you will also shortcut the virtualization
4106 you need on the simulator.
4110 * Cleanups in configury with regard to compile optimization/warning flags.
4111 Also add -fno-loop-optimize to any powerpc since it's the optimization
4112 killing gcc (< 3.4.0).
4113 * Doxygen cleanups: move MSG examples, kill the second Doxygen phase
4114 needed by MSG examples complications
4115 * Borrow configury beautifications from PHP
4118 * Bugfix: XBT_LOG_NEW_DEFAULT_CATEGORY now compiles without compiler
4119 warning (thanks loris for stumbling into this one).
4120 * Bugfix: stop loading private headers (gras_config.h) from the public
4124 * Change SIMGRID_INSTALL_PATH to GRAS_ROOT in Makefiles generated for user.
4125 * Rename gras_get_my_fqdn to gras_os_myname and implement it in the simulator
4126 RL would imply a DNS resolver, which is *hard* to do in a portable way
4127 (and therefore delayed).
4128 * Implement a real timer mechanism and use it in timing macros. This allows
4129 to avoid rounding errors and get a 0.000005 sec precision in timing
4130 macros. While I was at it, various cleanups:
4131 - allow to declare more than one timed section per file (fix a stupid bug)
4132 - move some private declaration to the right place
4133 - merge conditional execution and timing macros into emulation module
4134 - document the module
4135 - make sure the module cleanups its mess on gras_exit
4136 * Documentation improvements:
4137 - (new) how to compile applications using GRAS
4138 - (new) emulation support (timing macros)
4140 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 13 May 2005 10:49:31 +0200
4142 SimGrid (2.93) unstable; urgency=low
4144 Alpha 4 on the path to SimGrid 3 (aka the "neuf-trois" version)
4147 - Use Paje properly where used. Still to be sanitized properly.
4148 - Portability fix: Add an implementation of the contexts using pthread
4152 - Add xbt_procname(): returns the name of the current process.
4153 Use it to show the current process's name in all logging.
4155 - fix detection of older flex version and the reaction, since we do
4156 depend on modern ones (we use lex_destroy)
4157 - Better separation of SG and RL in the libs: remove all simulation code
4158 from libgras. As a result, this lib is now only 200k when stripped.
4159 Some of the xbt modules may also be duplicated (two sets and such) and
4160 should be cleaned/killed before SG3.
4161 - Insist on using xlC on AIX because of weird problems involving gcc there.
4162 - Cleanup the make remote stuff. This is now done by scripts
4163 tools/graspe-{master,slave} (GRAS Platform Expender). This is still
4164 mainly for our private use, but we're working on changing them to user
4167 - Bugfix: flush the socket on close only if there is some *output*.
4168 - Bugfix: flush idempotent when there's nothing to send (don't send size=0)
4170 - Add MSG_task_get_name. The task names are mainly for debugging purpose,
4173 -- SimGrid team <simgrid2-users@listes.ens-lyon.fr> Fri, 4 Mar 2005 14:32:37 -0800
4175 SimGrid (2.92) unstable; urgency=low
4177 Alpha 3 on the path to SimGrid 3
4181 - New! First try of benchmarking macros.
4182 - New! First try so that gras_stub_generator generate deployment and
4183 remote compilation helpers.
4185 - Bugfix: Initialization fix in msg_test.
4189 - Bugfix: applied patch to lexer so that it doesn't need a huge heap.
4191 - Bugfix: let dicts work with NULL content (_foreach didn't) and cleanups
4193 - API Change: gras_os_sleep to take the amount of seconds as a double.
4194 Accepting an int was error prone since it was the only location where
4195 seconds were coded as such. It leaded to damn rounding errors.
4196 - Bugfix: Hard to belive that timers ever worked before this.
4198 -- SimGrid team <simgrid2-users@listes.ens-lyon.fr> Wed, 23 Feb 2005 22:09:21 +0100
4200 SimGrid (2.91) unstable; urgency=low
4202 Alpha 2 on the path to SimGrid 3
4206 - Bug fix in the lmm_solver.
4208 - New! Interface to Paje (see http://www-id.imag.fr/Logiciels/paje/)
4209 through the function MSG_paje_output.
4210 - New! Introducing two new functions MSG_process_kill() and MSG_process_killall().
4211 - It is possible to bound the rate of a communication in MSG with
4212 MSG_task_put_bounded() (was already in the previous version but I had forgotten
4213 to write it in the changelog).
4214 - Bug fix to let GRAS run on top of MSG until we move it directly on top
4219 - Various cleanups to the autotools stuff
4220 - Begin to move Gras examples to examples/gras/
4221 - Let make distcheck work again (yeah!)
4223 - documentation overhauled using doxygen.
4224 gtk-doc-tools is dead in SimGrid now.
4225 - Automatically extract all existing logging categories, and add the list
4226 to the documentation (long standing one, to say the less)
4228 - Cleanup the known architecture table. Reorder the entries to group what
4229 should be, and use a more consistent naming scheme.
4230 (some of the test dataset are still to be regenerated)
4231 - New! Allow library to register globals on each process just as userdata
4233 This is implemented using a xbt_dict and not a xbt_set, so we loose the
4234 lookup time (for now).
4235 Use it in msg and trp.
4236 This cleans a lot the internals and helps enforcing privacy of the
4237 headers between the gras components.
4238 - New! Add a timer mechanism, not unlike cron(8) and at(1).
4239 - Bugfix: gras_os_time was delirious in RL.
4240 - Bugfix: gras_trp_select/RL don't run into the wall when asked to select
4242 - Reenable GRAS now that it works.
4244 -- Arnaud Legrand <Arnaud.Legrand@imag.fr> Mon, 14 Feb 2005 14:02:13 -0800
4246 SimGrid (2.90) unstable; urgency=low
4248 Alpha 1 on the path to SimGrid 3
4250 * It is a long time since the last release of SimGrid. I'm sorry about
4251 that but as I had told you, I was rewriting a lot of things. I apologize
4252 to those who had been reporting bugs to me and that I had not answered.
4253 If your bug is still in the new version, please tell me. Here is a
4254 summary of the main changes.
4256 * REVOLUTION 1: The SimGrid project has merged with the GRAS project
4257 lead by Martin Quinson. As a consequence SimGrid gains a lot in
4258 portability, speed, and a lot more but you'll figure it out later.
4259 SimGrid now comprises 3 different projects: MSG, GRAS and SMPI.
4260 I wanted to release the new MSG as soon as possible and I have
4261 broken GRAS, which is the reason why, for now, only MSG is fully
4262 functional. A laconic description of these projects is available
4263 in the documentation.
4265 * REVOLUTION 2: I have removed SG and I am now using a new simulation
4266 kernel optimized for our needs (called SURF but only the developers
4267 should use it). Hence, MSG is now roughly 30 times faster and I think
4268 that by rewriting a little bit MSG, I could event speed it up a little
4269 bit more. Beside the gain in speed, it is also much easier to encode a
4270 new platform model with SURF than it was with SG. More to come...
4272 * REVOLUTION 3: I have tried to change a little as possible the API of
4273 MSG but a few things really had to disappear. The main differences
4274 with the previous version are:
4275 1) no more m_links_t and the corresponding functions. Platforms are
4276 directly read from an XML description and cannot be hard-coded
4277 anymore. The same format is used for application deployment
4278 description. The new format is described in the documentation.
4279 Have a look in tools/platform_generation. There is a tiny script
4280 that converts from the old platform format to the new one. Concerning
4281 the application deployment format, parsing the old one is tricky.
4282 I think most of you should however be able to convert your files. If
4283 it is really an issue, I can write a C code that does the conversion.
4285 2) the toolbox tbx does not exist anymore. We now have a library
4286 with much more data-structures but without the hash-tables (we have
4287 dictionaries that are much faster).
4289 -- Arnaud Legrand <Arnaud.Legrand@imag.fr> Mon, 31 Jan 2005 10:45:53 -0800
4291 *****************************************************************************
4292 * Follows the old GRAS changelog. It does not follow the same syntax, but I *
4293 * don't feel like converting the oldies. (Mt) *
4294 *****************************************************************************
4297 Version 2.90: "the long awaited one"
4298 - Finished rewriting and debugging MSG. Rewrote the documentation.
4299 - disable GRAS for now since it needs to be ported to the newest SG
4302 - Finish the port to windows (using mingw32 for cross-compile)
4305 - Main loop and datastructures of SURF. A cpu resource object is
4306 functional. Surf can thus be used to create cpu's with variable
4307 performance on which you can execute some actions.
4309 2004-11-15 Martin Quinson
4310 - Port to ARM. Simply added the alignment and size descriptions. Should
4311 work, but the ARM machines are so slow that I didn't had the opportunity
4312 to 'make check' over there yet.
4314 2004-11-15 Arnaud Legrand
4315 - Trace manager now written. It uses a heap structure and is therefore
4316 expected to be efficient. It may however be speeded up (particularly
4317 when many events occur at the same date) by using red and black
4318 trees. One day maybe...
4319 - Max-min linear system solver written. It uses a sparse matrix
4320 structure taking advantage of its expected use. Most operations are
4321 O(1) and free/calloc are called as few as possible. The computation of
4322 the minimum could however be improved by using a red and black tree
4325 2004-11-03 Arnaud Legrand
4326 - Rename every gras_* function that was in xbt/ to its xbt_
4328 - Add a heap and a doubly-linked list to xbt
4329 - Added a dichotomy to the dictionaries. make check works as well before
4330 so I assume that the patch is correct. I do not know however if things
4331 run effectively faster than before now. :)
4333 Inclusion of the SimGrid tree in the GRAS one. The archive is renamed to
4334 SimGrid, and the version number is bumped to 2.x
4336 2004-10-29 Martin Quinson
4337 - Introduction of the remote errors.
4338 They are the result of a RMI/RPC on the remote machine.
4339 ErrCodes being scalar values, you can't get the host on which those
4340 errors did happen. Extending the error mechanism as in Gnome is possible.
4341 No idea yet whether it is a good idea.
4343 2004-10-28 Martin Quinson
4344 - Interface revolution: the Starred Structure Eradication.
4345 I used to do typedef struct {} toto_t; and then handle *toto_t.
4346 Arnaud (and Oli) didn't like it, and I surrendered. Now, you have:
4347 - ???_t is a valid type (builded with typedef)
4348 - s_toto_t is a structure (access to fields with .)
4349 - s_toto is a structure needing 'struct' keyword to be used
4350 - e_toto_t is an enum
4351 - toto_t is an 'object' (struct*)
4353 typedef struct s_toto {} s_toto_t, *toto_t;
4354 typedef enum {} e_toto_t;
4355 Moreover, only toto_t (and e_toto_t) are public. The rest (mainly
4356 s_toto_t) is private.
4358 - While I was at it, all gras_<obj>_free() functions want a gras_<obj>_t*
4359 so that it can set the variable to NULL. It was so for dicts and sets,
4360 it changed for dynars.
4362 - Fix a bunch of memleaks in dict_remove
4363 - Fix a bug in sg/server_socket opening: it failed all the time.
4365 2004-10-07 Martin Quinson
4366 - Speed up dynar lookup operation a bit.
4368 gras_dynar_get is dead.
4370 Now, you can choose between gras_dynar_get_cpy (the old gras_dynar_get
4371 but should be avoided for efficiency reasons) and gras_dynar_get_ptr
4372 (which gives you the address of the stored data).
4374 gras_dynar_get_as is an helpful macro which allows you to retrieve a
4375 copy of the data using an affectation to do the job and not a memcpy.
4377 int toto = gras_dynar_get_as(dyn,0,int); rewrites itself to
4378 int toto = *(int*)gras_dynar_get_ptr(dyn,0);
4380 It does not really speedup the dynar test because they are
4381 setting elements all the time (and look them seldom). But the dict does
4382 far more lookup than setting.
4384 So, this brings the dict_crash test from ~33s to ~25s (200000 elms).
4386 2004-10-05 Martin Quinson
4387 - Allow to (en/dis)able the cycle detection at run time.
4389 Whether we should check for cycle or not is now a property of each
4390 datatype. When you think there may be some cycle, use datadesc_cycle_set.
4391 datadesc_cycle_unset allow to remove this property when previously set.
4393 Note that the cycle detection is off by default since it impacts the
4394 performance. Watch the data you feed GRAS with ;)
4396 This property is hereditary. Any element embedded in a structure having it
4397 set have it set for the time of this data exchange.
4399 You should set it both on sender and receiver side. If you don't set it on
4400 sender side, it will enter an endless loop. If you forget on receiver
4401 side, the cycles won't be recreated after communication.
4403 - Header reorganization.
4404 Kill gras_private.h, each submodule must load the headers it needs.
4406 2004-10-04 Martin Quinson
4407 - Interface revolution: do not try to survive to malloc failure.
4409 Now, gras_malloc and friends call gras_abort() on failure.
4410 As a conclusion, malloc_error is not a valid error anymore, and all
4411 functions for which it was the only gras_error_t return value are
4412 changed. They now return void, or there result directly.
4413 This simplify the API a lot.
4415 2004-09-29 Martin Quinson
4416 - Re-enable raw sockets.
4417 Created by gras_socket_{client,server}_ext;
4418 Used with gras_raw_{send,recv}
4421 It should allow to kill the last bits of gras first version soon.
4423 This is not completely satisfactory yet (duplicate code with
4424 chunk_{send,recv}; a bit out of the plugin mechanism), but it should
4427 - Simplify transport plugin (internal) interface by not passing any
4428 argument to _server and _client, but embedding them in the socket
4431 2004-09-28 Martin Quinson
4432 - Finish the port to AIX.
4433 autoconf was my problem (segfault within the malloc replacement
4434 function. No idea why)
4436 2004-09-16 Martin Quinson
4437 - Fix some size_t madness on 64bit architectures.
4439 2004-09-08 Martin Quinson
4440 - Reduce the number of system headers loaded, overload some more system
4441 calls (such as malloc to cast the result of the system one, and work
4443 - Fix and reintroduce the config support
4445 2004-09-07 Martin Quinson
4446 - Source code reorganization to allow Arnaud to surf all over there.
4447 - Allow to document the logging categories.
4448 - Remove all uppercase from logging categories and useless cleanup in names.
4450 2004-08-18 Martin Quinson
4451 Version 0.6.2 (protocol not changed; API changed)
4452 - Interface cleanup: gras_msgtype_by_name returns the type (instead of a
4453 gras_error_t), and NULL when not found. Functions expecting a msgtype
4454 as argument (msg_wait; msg_send) deal with NULL argument by providing a
4455 hopefully usefull message.
4456 - Portability to prehistoric sparcs again
4458 2004-08-17 Martin Quinson
4459 Version 0.6.1 (protocol not changed; ABI not changed)
4460 - prealloc some buffers to speed things up
4462 2004-08-11 Martin Quinson
4463 Version 0.6 (protocol not changed; ABI expended)
4464 - The parsing macro can deal with the references, provided that you add
4465 the relevant annotations (using GRAS_ANNOTE(size,field_name))
4467 2004-08-09 Martin Quinson
4468 Version 0.5 (protocol not changed; ABI changed)
4469 - Allow to off turn the cycle detection code in data exchange at
4470 compilation time. It should be at run time, but I'm short of time (and
4471 the config stuff is still broken). That way, we keep dict out of the
4472 critical path, which is good because the performance is poor:
4473 - search not dichotomial yet
4474 - dynar give no way to access their content and memcpy everytime
4475 - In composed data description (struct, ref and so on), stop foolness of
4476 keeping the subtype's ID, but store the type itself. This keeps sets out
4477 of the critical path, which is good since they rely on dynar and
4478 dictionaries. The only loose of that is that we cannot detect the
4479 redeclaration of a structure/union with another content (but I'm not sure
4480 the code detected well this error before anyway). We still can detect
4481 the redefinition discrepancy for the other types.
4482 - Use a whole bunch of optimisation flags (plus -fno-strict-aliasing since
4483 it breaks the code because of type-punning used all over the place).
4484 This breaks on all non-gcc architectures (for now).
4486 All those changes (plus the buffer of last time) allow me to gain 2 order
4487 of magnitude on cruel tests consisting of 800000 array of integers on two
4488 level of a hierarchical structure (200 secondes -> 4 secondes)
4491 - the selector of reference must now return the type it points to, not
4492 the ID of this type.
4494 2004-08-06 Martin Quinson
4495 Version 0.4 (protocol changed; ABI not changed)
4496 - Allow to pass --gras-log argument to processes in simulation mode. Really.
4497 - New debugging level: trace (under debug) to see effect of GRAS_IN/OUT
4498 - Implement a buffer transport, and use it by default (it relies on tcp in
4499 real life and on sg in simulation).
4500 That's a bit hackish since I had a new field to the structure to store
4501 its data without interfering with the subtype ones. Inheritance
4502 is tricky in C. And that's a kind of reverse inheritance with one class
4503 derivating two classes. Or maybe a game with java interfaces. Anyway,
4504 that's damn hard in C (at least).
4505 Moreover, I got tired while trying to ensure plugin separation and
4506 genericity in SG mode. MSG wants me to do weird things, so let's go for
4507 cruel hacks (temporarily of course ;).
4508 See comment in transport_private.h:71
4509 - do not include all the _interface headers in private but in the files
4510 which really need them (to cut the compilation time when they are
4513 2004-07-26 Martin Quinson
4514 Version 0.3 (protocol not changed; ABI changed)
4515 - Major overhault of the datadesc interface to simplify it:
4516 - shorted the function names:
4517 s/gras_datadesc_declare_struct/gras_datadesc_struct/ and so on
4518 - add a trivial way to push/pop integers into the cbps without malloc.
4519 This allows to make really generic sub_type description, which simply
4520 pop their size of the stack.
4521 - add a function gras_datadesc_ref_pop_arr() which does what users want
4522 most of the time: Declare a dynamic array (which pops its size of the
4523 stack) and declare a reference to it. Poor name, but anyway.
4524 - kill the post-send callback, add a post-receive one
4526 2004-07-23 Martin Quinson
4527 Version 0.2 (protocol changed; ABI changed)
4528 - add some testing for cpbs in the test cases, and fix some more bugs.
4529 This invalidate again the little64 data file, since I cannot regenerate
4531 - remove an awfull optimization in the logging stuff, allowing me to:
4532 - understand it again
4533 - learn gcc how to check that the argument match the provided format
4534 - fix all errors revealed by gcc after that
4535 - internal keys of dict are not \0 terminated. Deal with it properly in
4536 loggings instead of segfaulting when the user want to see the logs :-/
4538 2004-07-22 Martin Quinson
4539 - Fix some stupid bug preventing cbps (callback postit) from working
4541 2004-07-21 Martin Quinson
4542 - Some documentation cleanups
4543 - remove the useless last argument of msgtype_declare
4544 - rename the Virtu functions to fit into the 'os' namespace
4545 - move headers src/include -> src/include/gras/ and stop fooling with
4546 gras -> . symbolic link
4547 - make distcheck is now successful
4549 2004-07-19 Martin Quinson
4551 - Build shared library also
4552 - Install html doc to the right location
4553 - stop removing maintainer files in make clean
4554 - build tests only on make check
4556 2004-07-13 Martin Quinson
4558 - No major issue in previous version => change versioning schema
4559 - Re-enable little64 convertion test now that Abdou kindly regenerated the
4560 corresponding dataset.
4562 2004-07-11 Martin Quinson
4564 - Get it working with any kind of structure (we can compute the padding
4565 bytes remotely for all the architectures I have access to)
4566 - Implement the structure parsing macro (still not quite robust/complete)
4567 - Improvement to the remote testing toysuite
4569 2004-07-10 Martin Quinson
4570 [autoconf mechanism]
4571 - get ride of a bunch of deprecated macros
4572 - actually run the test for two-compliment, not only compile it :-/
4573 - test whether the structures get packed (and bail out if yes. Damn.
4574 Alignment is a serious matter)
4575 - test whether the structures get compacted (but respecting the alignment
4576 constraints of each types)
4577 - test whether the array fields of structures can straddle alignment boundaries
4579 - Damnit, double are bigger than float (typo in creation of 'double' datadesc)
4580 (took me 2 hours to find that bug, looking at the wrong place)
4581 - Add gras_datadesc_declare_{union,struct}_close(). They must be used
4582 before sending/receiving and are used to compute the offsets of fields
4583 - Given that padding size depend even on compiler options, keep track of
4584 alignment and aligned_size only for the current architecture. Not a big
4585 deal since we send structure fields one after the other (seems
4587 - Add the datastructure used for IEEE paper by the PBIO guys to the test
4588 program, let it work on linux/gcc/little32. portability todo.
4590 2004-07-08 Martin Quinson
4591 - import and improve remote compilation support from FAST
4592 - make sure make check works on half a dozen of machines out there
4594 2004-07-07 Martin Quinson
4595 Let's say it's version 0.0.3 ;)
4596 - Implement conversions (yuhu!)
4597 - Let it work on solaris (beside conversion, of course)
4598 - Stupid me, using rand() to generate the conversion datatests in not wise.
4600 2004-07-06 Martin Quinson
4601 - Let make dist work, since I'm gonna need it to compile on remote hosts
4602 - Let Tests/datadesc_usage write the architecture on which the file was
4603 generated as first byte.
4604 - Add PowerPC (being also IRIX64), SPARC (also power4) and ALPHA
4605 architecture descriptions.
4606 - Add datadesc_usage.{i386,ppc,sparc} files being the result of execution
4607 on those architectures.
4608 - Optimization: send/recv array of scalar in one shoot
4610 2004-07-05 Martin Quinson
4611 - YEAH! GRAS/SG and GRAS/RL are both able to run the ping example !
4613 - Plug a whole bunch of memleaks
4614 - each process now have to call gras_{init,exit}. One day, their log
4615 settings will be separated
4616 - Continue the code factorisation between SG, RL and common in Transport.
4618 2004-07-04 Martin Quinson
4620 - Redistribution between SG and RL.
4621 We wanna have to accept in SG, so move accepted related parts of RL in
4622 the common part. (more precisely, the dynar of all known sockets is no
4623 more a static in transport.c, but part of the process_data)
4625 [gras_stub_generator]
4626 - Bug fix: Do call gras_process_init from gras_init (wasnt called in RL).
4628 2004-07-03 Martin Quinson
4629 - Create a new log channel tbx containing dict, set, log, dynar (to shut
4630 them all up in one shot)
4632 - Fix the ugly case of reference to dynamic array.
4633 - New (semi-public) function gras_datadesc_size to allow the messaging
4634 layer to malloc the needed space for the buffer.
4636 - gras_socket_close now expect the socket to close (and not its address to
4637 put NULL in it after it). This is because the socket passed to handlers
4638 is one of their argument (=> not writable).
4640 - propagate the interface cleanup from last week in datadesc, ie remove a
4641 superfluous level of indirection. User pass adress of variable
4642 containing data (both when sending and receiving), and not of a variable
4643 being a pointer to the data. Let's say that I like it better ;)
4644 The price for that is constructs like "int msg=*(int*)payload" in
4645 handlers, but it's a fine price, IMHO.
4647 - Let it work in RL (yuhu)
4649 2004-06-21 Martin Quinson
4651 - porting SG plugin and SG select to new standards (works almost).
4652 - plug memleaks and fix bugs around.
4655 - cleanup the prototype of data recv and force users to specify when they
4656 want to handle references to objects. Test case working even for cycles.
4657 - plug memleaks. Valgrind is perfectly ok with this.
4659 2004-06-12 Martin Quinson
4661 - cleanup the separation between plugin and main code in plugin creation
4663 2004-06-11 Martin Quinson
4665 - Reput hook for raw sockets, needed for BW experiments
4666 - kill a few lines of dead code
4667 [Data description] Interface cleanup
4668 - gras_datadesc_by_name returns the searched type or NULL.
4669 That way, no variable is needed to use a type desc once, which makes
4671 - gras_datadesc_declare_[struct|union]_append_name is removed. The last
4672 two parameters were strings (field name, type name), leading to
4674 [Dicos] Interface cleanup
4675 - gras_dico_retrieve -> gras_dico_get ; gras_dico_insert -> gras_dico_set
4676 This is consistant with the dynar API.
4678 2004-04-21 Martin Quinson
4680 - Porting to new standards.
4682 - interface cleanup.
4683 There is no bag anymore, no need to take extra provision to mask the
4684 pointers behind "ID".
4685 Better splitup of functions between files create/exchange/convert.
4686 This is still a bit artificial since convert and receive are so
4687 interleaved, but anyway.
4689 - add a queued message list to procdata (the ones not matching criteria
4691 - factorize some more code between SG and RL wrt procdata
4693 - use gras_exit in example to track memleaks
4694 - get rid of gs_example now that GS is properly integrated into gras
4695 - update run_test to integrate the latest tests (datadesc)
4697 - rename WARNINGn macros to WARNn since it prooved error-prone
4699 2004-04-19 Martin Quinson
4701 - register init/exit functions within gras module mechanism
4702 - send/receive function.
4703 Convertion is not implemented, but short-cutted if not needed.
4704 struct/array elements are sent one by one (instead of block-wise), but
4705 nobody really cares (yet). Get a prototype before optimizing.
4706 - tests (using a file socket) for DD send/receive on:
4707 - base types: int, float
4708 - array: fixed size, string (ie ref to dynamic string)
4709 - structure: homogeneous, heterogeneous
4710 - chained list, graph with cycle
4711 Believe it or not, valgrind is not too unhappy with the results. The
4712 cycle happily segfaults, but the others are ok. And I'm sick of pointers
4716 - Bugfix when using a filename explicitly (instead of '-')
4718 2004-04-09 Martin Quinson
4720 - factorize more code between RL and SG in socket creation
4721 - Complete the implementation and tests of:
4723 o file (only in RL, and mainly for debugging)
4725 I lost 3 days to design a portable address resolver, and then decided
4726 that the prototype mainly have to run on my box.
4727 Addressing portability too early may be like optimizing too early :-/
4729 - use gras_init in the Tests instead of the crappy parse_log_opt
4730 (the latter function is removed)
4731 [Conditional execution]
4732 - New functions: gras_if_RL/gras_if_SG (basic support for this)
4733 [Code reorganisation]
4734 - Get rid of libgrasutils.a since it makes more trouble than it solves.
4735 Build examples against the RL library, since there is no way to disable
4736 its creation for now.
4738 For information, the beginning of coding on GRAS was back in june
4739 2003. I guess that every line has been rewritten at least twice since