1 SimGrid (3.30.1) NOT RELEASED YET (v3.31 expected March 20. 2022, 15:33 UTC)
4 - Rework the internals, for simpler and modern code. This shall unlock many future improvements.
5 - You can now define plugins onto the DFS explorer (previously called SafetyChecker), using the
6 declared signals. See CommunicationDeterminism for an example.
7 - Support mutex, semaphore and barrier in DPOR reduction
8 - Seems to work on Arm64 architectures too.
9 - Display a nice error message when ptrace is not usable.
10 - New test suite, imported from the MPI Bugs Initiative (MBI). Not all MBI generators are integrated yet.
11 - Remove the ISP test suite: it's not free software, and it's superseeded by MBI.
14 - fix for FG#100 by ensuring small asynchronous messages never overtake larger
15 ones, conforming to the standard.
16 - replay: fix waitall behaviour to avoid forgetting requests and leaking
18 - tracing: ensure that we dump the TI traces continuously during execution and
19 not just at the end, reducing memory cost and performance hit.
20 - Update OpenMPI collectives selection logic to match current one (4.1.2)
23 - New signal: Engine::on_simulation_start_cb()
24 - Introduce a new execution mode with this_actor::thread_execute(). This simulate
25 the execution of a certain amount of flops by multiple threads ran by a host. Each
26 thread executes the same number of flops, given as argument. An example of this new
27 function can be found in examples/cpp/exec-threads.
28 - Reimplementation of barriers natively.
29 Previously, they were implemented on top of s4u::Mutex and s4u::ConditionVariable.
30 The new version should be faster (and can be used in the model-checker).
31 - Actor::get_restart_count(): Returns the number of reboots that this actor did.
34 - MSG_barrier_destroy now expects a non-const msg_barrier parameter.
36 New plugin: the Chaos Monkey (killing actors at any time)
37 - Along with the new simgrid-monkey script, it tests whether your simulation
38 resists resource failures at any possible timestamp in your simulation.
39 - It is mostly intended to test the simgrid core in extreme conditions,
40 but some users may find it interesting too.
43 - New model for parallel task: ptask_BMF.
44 - More realistic sharing of heterogeneous resources compared to ptask_L07.
45 - Implement the BMF (Bottleneck max fairness) fairness.
46 - Improved resource sharing for parallel tasks with sub-flows (parallel
47 communications between same source and destination inside the ptask).
49 - "--cfg=host/model:ptask_BMF": enable the model.
50 - "--cfg=bmf/max-iterations: <N>" - maximum number of iterations performed
51 by BMF solver (default: 1000).
52 - "--cfg=bmf/selective-update:<true/false>" - enable/disable the
53 selective-update optimization. Only invalidates and recomputes modified
54 parts of inequations system. May speed up simulation if sparse resource
55 utilization (default: false).
56 - ATTENTION: this model requires Eigen3 library. If you install SimGrid
57 from source, please see the "Installing from source" section:
58 https://simgrid.org/doc/latest/Installing_SimGrid.html#installing-from-the-source.
59 No action is required if you use pre-compiled packages.
62 - Modifications of the Profile mechanism, with some impact on users
63 - Addition of a new (S4U) method to init profiles from generic functions to improve versatility
64 - Fix initial behaviour of state_profiles
65 - Modify periodicity to behave like a period, and not like a loop delay
68 - Drop xbt_dynar_shrink().
71 - Made the following bindings static (previously member functions):
72 - Actor: Actor.kill_all(), Actor.by_pid()
73 - Host: Host.by_name(), Host.current(), Host.on_creation_cb()
74 - Mailbox: Mailbox.by_name()
75 - Added the following bindings:
76 - this_actor.warning()
77 - Mailbox.put_init() [example: examples/python/comm-waitallfor/]
78 - Comm.detach() [example: examples/python/comm-waitallfor/]
79 - Comm.wait_for() [example: examples/python/comm-waitfor/]
81 - Comm.wait_all_for() [example: examples/python/comm-waitallfor/]
82 - Mutex [example: examples/python/synchro-mutex/]
85 - Remove target "make uninstall" which was incomplete and no longer maintained.
87 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
88 (FG: issues on Framagit; GH: issues on GitHub)
89 - FG#57: Mc SimGrid should test whether ptrace is usable
90 - FG#87: Smpi scripts fail with spaces in paths
91 - FG#100: [SMPI] Order of the message matching is not guaranteed
92 - FG#101: LGPL 2.1 is deprecated license
93 - FG#104: "make uninstall" not up-to-date
94 - GH#151: Missing mutexes for DPOR.
96 ----------------------------------------------------------------------------
98 SimGrid (3.30) January 30. 2022.
100 The Sunday Bloody Sunday release.
102 Main user-visible changes:
103 - The SimDag API for the simulation of the scheduling of Directed Acyclic
104 Graphs has been dropped. It was marked as deprecated for a couple of years.
105 We finally complete the implementation of what has been called SimDag++
106 internally, i.e., porting the different features of SimDag on top of S4U.
107 The new way to simulate the execution of dependent activities directly by
108 maestro (without any other actor) is details in the examples/cpp/dag-* series
110 - The removal of SimDag led us to also remove the export to Jedule files that
111 was tightly coupled to SimDag. The instrumentation of DAG simulation is still
112 possible through the regular instrumentation API based on the Paje format.
113 - We also dropped the old and clumsy Lua bindings to create platforms in a
114 programmatic way. It can be done in C++ in a much cleaner way now, which
115 motivates this suppression.
118 - Introduce on_X_cb() functions for all signals, to attach a new
119 callback to the signal X. The signal variables are now hidden and
120 only these functions should be used.
121 Rationale: this enables the usual deprecation scheme where functions
122 remain for 4 releases if we need to modify the signals, while the
123 current code with the signal variables directly visible prevents any
125 - New function: Engine::run_until(date), to split the simulation.
126 - New signal: Activity::on_veto, to detect when an activity fails to start.
127 - Signal change: Comm::on_start(Comm&, bool) has been replaced by
128 Comm::on_send and Comm::recv. These two signals respectively correspond to
129 when the sending or receiving side of a Comm is ready. They are raised at
130 the same locations as the former Comm::on_start signal.
131 - New function: Engine::track_vetoed_activities() to interrupt run()
132 when an activity fails to start, and to keep track of such activities.
133 Please see the corresponding example for more info.
134 - New functions: s4u::Comm::{sendto_init, set_source, set_destination} to enable
135 the use of vetoers with direct host-to-host communications. Both source and
136 destination have to set for a comm to start. Each call to these setters check
137 if all vetoes are satisfied. When it is the case, the comm starts. A use case of
138 these functions is given in examples/cpp/dag-scheduling.
139 - New functions: {Exec, Io}::update_priority allow you to modify the priority of
140 these kinds of activities during their execution. Behavior is detailed in
141 examples/cpp/io-priority/.
144 - Dynamic costs for MPI operations: New API to allow users to dynamically
145 change injected costs for MPI_Recv, MPI_Send and MPI_Isend operations.
146 Alternative for smpi/or, smpi/os and smpi/ois configuration options.
147 - Fix some issues with the replay mechanism.
150 - Function xbt::Extendable::get_data() is now templated with the type of the
151 pointee. Untyped function is deprecated. Use get_data<void>() if you still
152 want to retrieve void*.
155 - New section: "SimGrid MPI calibration of a Grid5000 cluster"
156 presenting how to properly calibrate MPI communications in SimGrid.
157 - Complete and reword the platform section, which is now completed.
160 - Thread contexts are used by default with Python bindings. Other kinds of
161 contexts revealed unstable, specially starting with pybind11 v2.8.0.
163 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
164 (FG: issues on Framagit; GH: issues on GitHub)
165 - FG#95: Wrong computation time for multicore execution after pstate change
166 - FG#97: Wrong computation time for ptask+multicore+pstates
167 - FG#98: SMPI offline simulation is inconsistent with the online simulation
168 (deadlocks / message truncation)
169 - FG#99: Weird segfault when not sealing an host
171 ----------------------------------------------------------------------------
173 SimGrid (3.29) October 7. 2021
175 The "Ask a stupid question" release.
177 We wish that every user ask one question about SimGrid to celebrate.
178 On Mattermost, Stack Overflow or using the issues tracker.
181 New modeling features:
182 - Non-linear resource sharing, modeling resources whose performance heavily degrades with contention:
183 - The total capacity may be updated dynamically through a callback
184 and depends mainly on the number of concurrent flows.
185 - Examples (both cpp and python): io-degradation, network-nonlinear, exec-cpu-nonlinear
187 - Dynamic factors: model variability in the speed of activities
188 - Each action can now have a factor that affects its progression.
189 This multiplicative factor is applied when updating the amount of work
190 remaining, thereby an activity with factor=0.5 only uses half of the
191 instantaneous power/bandwidth it is allocated and will appear twice
192 slower than what it actually consumes.
193 - This can be used to model a overhead (e.g., there is a 20 bytes
194 header in a 480 bytes TCP packet so the factor 0.9583) but the novelty
195 is this factor can now easily be adjusted depending on activity's and
196 resources characteristics.
197 - This existed for network (e.g., the effective bandwidth depends
198 on the message in SMPI piecewise-linear network model) but it is now
199 more general (the factor may depend on the source and destination and
200 thus account to different behaviors for intra-node communications and
201 extra-node communications) and is available for CPUs (e.g., if you
202 want to model an affinity as in the "Unrelated Machines" problem in
203 scheduling) and disks (e.g., if you want to model a stochastic
205 - For that, resources can be provided with a callback that computes
206 the activity factor when creating the action.
207 - Example: examples/cpp/exec-cpu-factors
208 - The same mechanism is also available for the latency, which
209 allows to easily introduce complex variability patterns.
212 - Added support to programmatic platform creation in Python.
213 Example: examples/python/clusters-multicpu
216 - Disk and Host now have a set_sharing_policy() too, for non-linear sharing.
217 This can only be set through the API, not through XML files.
221 - Multiple fixes to ensure reproducibility of tracing
222 - scan/excan can now be replayed
223 - wait action now uses ranks and not pid, as the other ones.
224 - smpi/init and smpi/finalization-barrier are now valid for replays.
225 - exit() is now intercepted by SMPI to avoid premature shutdown of
226 simulation. First non 0 return codes is returned as simulation return
230 * New section "Release Notes" documenting recent and current developments.
231 * New section "Modeling I/O: the realistic way" presenting how to properly model disks in SimGrid.
232 * Improvements in API Reference for C++ and Python interfaces.
235 - Make wifi creation compatible with ns-3 version 3.34 too.
237 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
238 (FG: issues on Framagit; GH: issues on GitHub)
239 - FG#77: Search feature of doc is broken (update sphinx theme version)
240 - FG#78: Multiple fixes for SMPI replay:
241 - TI tracing of allotallv/w was outputting wrong values
242 - MPI_LOGICAL in fortran is actually 32 bits wide, and not 8.
244 ----------------------------------------------------------------------------
246 SimGrid (3.28) July 14. 2021
248 The Victoriadagarna Release.
251 - C++ platform interface: Users can now describe their platform directly in C++.
252 This provides greatly flexibility and performance improvement for complex
253 platforms. Main features:
254 - Fat-Tree/DragonFly/Torus composing: allows you to create clusters of
255 "zones", instead of single hosts. This feature enables the description
256 of clusters with complex hosts, composed of several CPUs, GPUs, etc.
257 - StarZone: new zone with a Star-like topology. The routes are defined
258 as a set of links used to communicate from node to everybody (node<->ALL).
259 - Split-Duplex links: auxiliary method to create split-duplex links in
260 the platform, easing its utilisation. It automatically creates both UP
261 and DOWN links (similarly as done in XML).
262 - Please refer to the documentation and the examples included:
263 e.g. examples/cpp/clusters-multicpu/ and examples/platforms/*.cpp.
264 - New plugin: Producer-Consumer with monitor. Just requires to include the
265 include/simgrid/plugins/ProducerConsumer.hpp header to be used. See the
266 associated example (examples/cpp/plugin-prodcons).
269 - New: s4u::Comm::wait_all_for() (like s4u::Comm::wait_all, but with a timeout),
270 s4u::Io::wait_any(), s4u::Io::wait_any_for().
271 - Methods test_all/test_any/wait_all/wait_any in s4u now take their vector
272 parameter by reference, instead of a pointer.
273 - Fixed a bug where Activity::wait_for() killed the activity on timeout.
274 Explicitly cancel the activity to get back to previous behavior.
275 - New: Link::set_concurrency_limit() to limit the amount of concurrent flows.
278 - The default SMPI compiler flags are no more taken from the environment.
279 They can be explicitly set through cmake parameters SMPI_C_FLAGS,
280 SMPI_CXX_FLAGS, or SMPI_Fortran_FLAGS.
282 --cfg=smpi/finalization-barrier: which can be used to add
283 a barrier inside MPI_Finalize. This can help for some codes which cleanup
284 data attached to a process, but still used in other SMPI processes.
285 --cfg=smpi/errors-are-fatal: True by default, behaves like if MPI_ERRORS_RETURN
286 is active when set to false, to keep going after a small error
287 --cfg=smpi/pedantic: True by default. Do not report some harmless MPI errors
288 which may or may not be problematic in the end.
290 - fix behaviour, as maximum iteration count could be ignored
291 - add SMPI_SAMPLE_LOCAL_TAG and SMPI_SAMPLE_GLOBAL_TAG macros, to allow user to
292 use sampling when the same kernel is called with a different set of parameters
293 which have an impact on the timing.
294 - realloc is now intercepted, to be coherent, as malloc/calloc/free were already.
295 It should now work with smpi/auto-shared-malloc-thresh.
296 - Improve error handling and reporting in multiple places
297 - Improve correctness checks on the MPI code.(MPI_Op and MPI_Datatype
298 validity checks, truncated messages are now an error, return errors
299 when explicitely deleted handles are reused, ...)
300 - RMA: multiple fixes and stability improvements.
301 - analysis (-analyze flag in smpirun):
302 - SMPI can now report buffer leaks as well as MPI handles leaks,
303 if code was compiled without SMPI_NO_OVERRIDE_MALLOC.
304 - if -trace-call-location is used when compiling, SMPI can report
305 origin of leaked handles/buffers
306 - group leaks by type/origin in output message if possible
307 - New implemented MPI calls: MPI_Comm_test_inter
310 - Changed internal implementation of bandwidth factors in network models.
311 Models affected: CM02, LV08 (default), SMPI, IB.
312 Configuration affected: "network/bandwidth-factors" and "smpi/bw-factors".
313 Bandwidth factors are applied to communications to describe that users
314 cannot use 100% of the available bandwidth. For example, the default network model,
315 LV08, applies a factor of 0.97 to the bandwidth. In older versions, this
316 behavior was implemented by limiting the bandwidth available in the LMM
317 system for this flow. This may give the false impression that there is
318 bandwidth available for other flows due to its underutilization, especially
319 for the dynamic bandwidth factors used in SMPI models.
320 To avoid this, we have modified the implementation so that each flow uses the
321 maximum physical bandwidth according to the LMM system.
322 However, the actual throughput of the flow seen by the user is defined by
323 the physical bandwidth multiplied by the bandwidth factor.
324 This change impacts on the simulation results for all network models on
325 which we have bandwidth factors configured.
326 *****************************************
327 *DO NOT MIX 3.28 RESULTS WITH OLDER ONES*
328 *****************************************
329 This change may impact on the timing of your simulation results.
330 Take care when comparing simulations from different SimGrid's
331 versions. Sorry for the inconvenience.
332 - Dynamic network factors: users can configure a callback to define
333 the network factors dynamically. This API is available at
334 simgrid::kernel::resource::NetworkModelIntf.
335 - Users have access to complete information about the current communication
336 to decide which factor to apply. This includes: message size, source and
337 destination hosts, links and zones traversed.
338 - Dynamic factors for both latency and bandwidth.
339 - For more details, see the example in (examples/cpp/network-factors).
340 - Plugin host_energy: the "watt_off" and "watt_per_state" host properties,
341 deprecated since version 3.24, are no longer supported. Instead, use
342 "wattage_off" and "wattage_per_state".
345 - xbt_assert is not disabled anymore, even when built with enable_debug=off.
348 - New tutorial: Model-checking and formal assessment
349 - New sections: "Demystifying the routing" and "C++ platforms"
350 - Update and improve the part on visualization in MPI and Algo tutorials.
351 - Improve the section on routing: how to define it, how it's used internally
352 - Fix many issues, broken links and missing references in doxygen and Sphinx
355 - Lua platform files are deprecated. Their support will be dropped after v3.31.
358 - Legacy functions deprecated in this release: SIMIX_get_clock(), SIMIX_run().
360 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
361 (FG: issues on Framagit; GH: issues on GitHub)
362 - FG#47: Complete and fix tests from teshuite/s4u/activity-lifecycle
363 - FG#64: Configuring smpi/IB-penalty-factors
364 - FG#67: Running computation concurrently with MPI_Iallreduce
365 - FG#69: Tutorial misleading users of pre-v3.26 versions of SimGrid
366 - FG#71: Segmentation fault on invalid gw_src/gw_dst
367 - GH#322: Issue when an actor kills his host vm
369 ----------------------------------------------------------------------------
371 SimGrid (3.27) March 29. 2021
373 The Ragnar Release (anniversary of the siege of Paris by Vikings in 845)
375 Main user-visible changes:
376 - All functions marked as deprecated for one year were removed.
377 - Removed all that was related to the "Storage" type in all APIs and bindings.
378 "Disks" have been introduced more than a year ago to replace them for the better.
379 It's time to finish this replacement.
380 - SMPI ABI breaks from previous version: MPI global handles (predefined datatypes,
381 ops, COMM_WORLD) are now defined differently, and can be used in initializers,
382 avoiding "initializer element is not constant" errors with some codes. Please be
383 careful to recompile your MPI codes if switching to this new SimGrid version.
384 - Network model ns-3 now requires version ns-3.28 or higher.
385 - Removed some option aliases that were deprecated since v3.23 (June 2019)
386 - 'verbose-exit' is now 'debug/verbose-exit'
387 - 'simix/breakpoint' is now 'debug/breakpoint'
388 - 'clean-atexit' is now 'debug/clean-atexit'
391 - New functions: Comm::sendto_{init,async} to initiate a communication
392 on between two (possibly remote) hosts.
393 - Define new template functions Mailbox::get_unique(), returning a std::unique_ptr.
394 - Functions Mailbox::get() and Mailbox::get_async() are now templated with the
395 type of the pointee. Untyped functions are deprecated. Use Mailbox::get<void>()
396 or Mailbox::get_async<void>() if you really want to play with void*.
397 - Unify the interface of Activity::on_{start/activity}
398 - New function: Comm::get_dst_data()
399 - New function: Comm::set_payload_size() to set the amount of bytes to simulate.
402 - ptask should now work better with multicore hosts (FG#37).
403 - Internal cleanups and refactoring around activities, to prepare for SimDAG++.
404 - Internal cleanups and refactoring around models, to prepare for programmatic
406 - Modernize our tests of the performance models
410 - New section: Configuring the logs from the command line.
411 - New section: Programming API of logs.
412 - New section: Getting realistic results
413 - New section: Examples of SMPI Usage
414 - New part: SimGrid's Internals, with a section on Design goals
415 - Move back to the classical Breathe tool chain, and fix many small glitches.
418 - Handle leak checking: SMPI will now display a message if MPI handles are still
419 present at the end of a simulation. Option smpi/list-leaks:n will display the n
420 first leaked pointers and their types.
421 - smpi/display-allocs option : Display Memory allocations analysis, with hints
422 about the largest allocations. This only works for allocations with malloc/calloc
423 and not compiled with SMPI_NO_OVERRIDE_MALLOC
424 - "-analyze" option in smpirun will activate smpi/display-allocs and smpi/display-timing
425 - New implemented MPI calls: MPI_File_set_size, MPI_Aint_add, MPI_Aint_diff,
426 MPI_Type_get_extent_x, MPI_Type_get_true_extent_x, MPI_Status_set_elements_x
427 - Support for MPI C++ datatypes (MPI_CXX_BOOL, MPI_CXX_FLOAT_COMPLEX,
428 MPI_CXX_DOUBLE_COMPLEX, MPI_CXX_LONG_DOUBLE_COMPLEX)
429 - Replay now opens and parses the trace file only once for all ranks when possible.
431 - better handling of MPI_PROC_NULL
432 - MPI_Group_incl was broken in some cases
433 - PAPI tracing now fixed
434 - MPI_Errhandlers are properly handled for MPI_COMM_WORLD
435 - SMPI will now fail properly when receive size < sent size, instead of
436 just setting MPI_ERR_TRUNCATE and keep going.
437 - Proxy Apps ( https://framagit.org/simgrid/SMPI-proxy-apps ):
438 - Remove useless build patches and split build/run patches on the page
439 - Build in parallel when possible
440 - Test on yum-based systems
441 - New nightly tested Proxy-apps:
442 - OpenMPI mpi-test-suite
443 - Coral MCB, LSMS, Qbox, CLOMP
444 - ECP/Mantevo Cloverleaf3D, Ember
445 - Codevault bhtree_mpi
448 - Only initialize the Dwarf parser when needed, saving 10 seconds in most cases.
449 - Start to overhaul the implementation to modernize it (still ongoing).
452 - Drop simgrid::xbt::demangle(). Please use boost::core::demangle() instead.
453 - Drop xbt_dynar_cursor_rm(), xbt_dynar_search_or_negative(),
454 xbt_str_split_quoted(), xbt_str_split_quoted_in_place().
455 - Deprecate xbt_dynar_to_array().
456 - When an exception occurs in kernel mode, display both the actor and kernel stacks.
458 C binding and interface:
459 - Rename (lowercase) functions sg_actor_get_PID, sg_actor_get_PPID, sg_actor_by_PID.
460 - Constness requirement has been lowered for parameter argv of sg_actor_start()
461 and sg_actor_create() It's now (char* const*). The previous version is still
462 available as sg_actor_start_() and sg_actor_create_().
464 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
465 (FG: issues on Framagit; GH: issues on GitHub)
466 - FG#37: Parallel tasks are limited to 1 core per host
467 - FG#62: Running "smpirun -replay" on large networks
468 - FG!46: Fix a few potential memory leaks in SMPI colls
469 - GH#343: Wrong consumed energy when an exec timeouts
471 ----------------------------------------------------------------------------
473 SimGrid (3.26) December 15. 2020
475 The Release release (the French lockdown was eased today).
477 Important user-visible changes:
478 - SimGrid now requires a compiler with C++14 support.
479 Sibling projects should upgrade their FindSimgrid.cmake
480 - Surf precision default value is now 1e-9, instead of 1e-5. This was changed as
481 several users had difficulties to understand issues when using high bandwidth or
482 small latency events. The new value was already the default for SMPI and
483 should not cause too much performance hit. It can change some simulation
484 timings if simulation was skipping a lot of small events (which was actually
485 an issue per see). The old value can be restored with --cfg=surf/precision:1e-5.
486 - On some network models (L07, CM02, LV08), an implicit loopback link is created
487 for local communication. Default bandwidth was 500MBps and latency was 15µs,
488 which was rather bad. Default values have been changed to 10GBps and 0 latency.
489 Options network/loopback-lat and network/loopback-bw have been added to adapt
490 these values if needed. Network and routing models already providing separate
491 loopbacks (clusters and such) are not impacted by this change.
492 - SMPI now adds 16 bytes of header to each message sent, in order to simulate
493 metadata that are added to each MPI message by MPI libraries (tag,
494 src/dest, and communicator information). This may change simulation times
495 for very small message sizes, but should be more realistic.
498 - New routing 'WiFi' that makes it easier to specify a wifi network zone.
499 - New plugins: wifi_energy and link_load. See the associated examples.
500 - New examples: wifi networks, and communication suspend.
503 - LTO is now enabled for Intel/clang compilers.
504 - LTO behavior on GCC can be parameterized using LTO_EXTRA_FLAG in cmake.
505 Setting it to "auto" will use all available cores, while setting it to n will
506 use n cores to speedup link step (usage: cmake -DLTO_EXTRA_FLAG=4).
507 - Remove obsolete runtime option 'contexts/parallel-threshold'.
508 - Runtime option 'tracing/msg/process' renamed to 'tracing/actor'. The old name
509 has been kept for compatibility.
510 - Finally remove obsolete snake_case() aliases for runtime options.
511 - Further improve the documentation.
514 - the on_exit() of each actor is also executed when the simulation deadlocks.
515 - New functions: s4u::Activity:: suspend(), resume() and is_suspended()
516 An example is provided for s4u::Comm but it should work with Exec and Io.
519 - Update proxy apps coverage of new ECP apps: 60+ apps now tested nightly on
520 https://framagit.org/simgrid/SMPI-proxy-apps
521 - MPI/IO: supports names starting with "./"
522 - Fortran: many MPI/IO bindings, support for MPI_UB/LB, C MPI_INT/FLOAT/DOUBLE
524 - smpicc/cxx/ff/f90 now will actually perform definition checks at link time. When
525 building shared libraries, this may cause issues, so environment variable
526 SMPI_NO_UNDEFINED_CHECK can be added to disable this.
527 - most temporary files should now be created in /tmp dir (or equivalent).
528 If this one does not allow execution of code (noexec flag), this may cause issues.
529 Please use another tmp directory (using TMPDIR or equivalent system variable)
533 - A large refactoring is ongoing, but this should be transparent for users so far.
536 - Drop xbt_str_split().
538 C binding and interface:
539 - The return type of the sg_actor_on_exit() callbacks is now 'void'
540 (int value was previously ignored)
541 - Many C functions were renamed to follow a common naming style
542 (sg_object_get_something and sg_object_set_something). As usual, the deprecated
543 names are kept until version 3.30.
544 - Many MSG tests were converted to the new S4U's interface in C, that
545 was extended for that.
547 Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
548 (FG: issues on Framagit; GF: issues on GForge; GH: issues on GitHub)
549 - FG#41: Add sg_actor_create C interface
550 - FG#43: xbt::random needs some care
551 - FG#48: The Impossible Did Happen (yet again)
552 - FG#50: Suspending an actor executed at the current timestamp fails
553 - FG#52: Zero-seconds timeout : "That's in the past already"
554 - FG#53: Crash while using ns-3 network model
555 - FG#54: How to suspend a comm?
556 - FG!22: Stochastic Profiles
557 - FG!24: Documentation and fix for xbt/random
558 - FG!35: Add a modeling hint for parallel links in doc
559 - FG!36: [xbt/random] Read/Write the state of the RNG
560 - FG!42: Link cumulated load plugin
561 - FG!44: Test condition variable wait_until+notify_all
562 - GF#18137: Allow different stack sizes?
563 - GH#128: Parallelization of simulation with --cfg=contexts/nthreads
564 - GH#139: Allow pthread creation in SMPI
565 - GH#336: Packet-level simulation using SMPI?
566 - GH#345: Error in the LMM while migrating a VM
567 - GH#346: [SMPI] error while loading shared libraries: libsimgrid.so
568 - GH#352: pip install / python setup.py install fail to find pybind11
569 - GH!337: Fix link_energy plugin for wifi platforms
570 - GH!339: Add Mailbox set_receiver method to python binding
571 - GH!344: Cast hugepages macros parameters to int64
573 ----------------------------------------------------------------------------
575 SimGrid (3.25) February 2. 2020 (aka 02 02 2020)
577 The Palindrom Day Release.
579 Important user-visible changes:
580 - Improve the Python usability (stability and documentation).
581 - A nasty synchronization bug was ironed out, see also below.
582 - Python's doc was organized as a separate tree, now integrated with C++.
583 - C bindings of S4U were not part of the doc.
584 - The C++ doc was also improved as methods are now split by theme.
585 - Further deprecate MSG: you now have to pass -Denable_msg=ON to cmake.
586 - This is mandatory to use the Java bindings.
587 - OFF by default; The plan is to completely remove MSG by 2020Q4 or 2021Q1.
588 - SimDAG++: Automatic dependencies on S4U activities (experimental)
589 - Some features are already implemented but not all of them
590 - Cannot block an activity until it's scheduled on a resource
591 - No heterogeneous wait_any() that would mix Exec/Comm/Io activities.
592 - See examples/s4u/{io,exec,comm}-dependent for what's already there.
595 - Upgrade documented Java dependency to Java 8 (earlier versions don't work).
596 - Drop support for Viva/Triva (old visualization tools), hence removed
597 TRACE_get_node_types() and TRACE_get_edge_types() functions.
600 - Require pybind11 version 2.4.
601 - Greatly improve locking during context switches with Python.
602 - Declaring Python callbacks to this_actor::on_exit is now working.
603 - No more tests are failing currently, even on win32.
606 - Actor: Merge signals on_migration_start/end into on_host_change
607 - Actor: Rename migrate() into set_host()
608 - Disk: Allow users to get the read and write nominal bandwidth values
609 - Exec: Implement wait_for(timeout)
610 - Io: Implement wait_for(timeout)
613 - Parse errors now raise a simgrid::ParseError that you may want to catch.
616 - In simgrid::kernel::resource::Model, the methods next_occuring_event*() have
617 been renamed to fix a spelling error. As usual, the previous definitions are
618 kept with a deprecation warning. However, to avoid runtime errors, it is now
619 forbidden to override these deprecated methods in a derived class. Please use
620 the new names immediately if you need to override them.
623 - Remove unused parameter 'free_ctn' for xbt_dict_set() and xbt_dict_set_ext().
624 - Drop unused functions for dicts and dynars: xbt_dict_cursor_get_elm,
625 xbt_dict_get, xbt_dict_get_elm, xbt_dict_get_ext, xbt_dict_get_key,
626 xbt_dict_remove, xbt_dict_reset, xbt_dynar_compare, xbt_dynar_dump,
627 xbt_dynar_foreach_ptr, xbt_dynar_free_data, xbt_dynar_free_voidp,
628 xbt_dynar_init, xbt_dynar_insert_at_as, xbt_dynar_merge,
629 xbt_dynar_remove_n_at, xbt_dynar_replace, xbt_dynar_search, xbt_dynar_set.
630 - New module: random, providing classical random numbers generators.
633 - New option : "smpi/auto-shared-malloc-thresh" which sets a value for
634 allocations' size above which they are considered "shared" by default (as if
635 they were performed through SMPI_SHARED_MALLOC macros).
636 Default = 0 = disabled feature.
637 Note : malloc, calloc and free are now overridden by smpicc/cxx by default.
638 This can cause some troubles if codes are already overriding these. If this
639 is the case, defining SMPI_NO_OVERRIDE_MALLOC in the compilation flags can
640 help, but will make this feature unusable.
641 - Input check is now performed much more consistently and outputs precise
642 warnings for each error found
643 - New supported calls : MPI_File_set_view, MPI_File_get_view
644 - MPI I/O now only supports disks, as storage is discontinued.
645 - MPI I/O allows opening files without specifying absolute path
646 - Note : SMPI configuration options are now initialized by smpi_init_options()
647 call, which should be called if SMPI is not being used through smpirun.
649 Fixed bugs (FG#.. -> framagit bugs; FG!.. -> framagit merge requests):
650 - FG#9: Python bindings crashing
651 - FG#39: Missing s4u::Comm::wait_any_for example
652 - FG#42: Add support for ThreadSanitizer (TSan)
653 - FG!19: Removing RngStream
654 - FG!20: A module for RNG calls
655 - FG!21: Choice between ad-hoc and standard distributions implementations
657 - FG!25: Fix link in Mutex doc
658 - FG!26: Fix links in SMPI interface doc
659 - GH#31: [MC] please provide an option to make MPI_Send asynchronous
660 - GH#305: Unscheduled tasks are still excuted
661 - GH#313: smpirun: manual outdated w.r.t. --help
662 - GH#321: [S4U] Get task remaining work ratio
663 - GH#323: Crash when an actor turn off his physical host
664 - GH#335: Missing links on dragonfly example svg
665 - https://lists.gforge.inria.fr/pipermail/simgrid-user/2019-November/004653.html:
666 MPI_Cart_sub was not working properly. Kudos to Jonathan Borne for the report.
668 ----------------------------------------------------------------------------
670 SimGrid (3.24) October 9. 2019
672 The Clean Disk Release.
675 - Introduce a s4u::Disk interface to manage the newly introduced <disk>
676 tag. s4u::Disk is called to supplant s4u::Storage in a near future. It
677 thus becomes the default resource to execute I/O operations. Examples
678 and the file system plugin have been modified to use disks instead of
679 storage elements. Storage can still be used but is doomed to disappear.
680 Users are thus adviced to update their simulators accordingly.
681 - Barrier::wait returns SG_BARRIER_SERIAL_THREAD for (only) one actor
682 for consistency with pthread_barrier_wait()
683 - Host::get_englobing_zone() returns the englobing netzone
684 - Actor::on_destruction is now called in the destructor
685 Actor::on_termination new signal called when the actor terminates
687 - Global signals are now part of the Engine:
688 - on_platform_creation: after config settings, before the XML parsing
689 - on_platform_created: right after the XML parsing
690 - on_time_advance: each time the clock advances
691 - on_simulation_end: after simulation, before cleanups
692 - on_deadlock: as the name implies.
694 - sg_{actor,host,link}_{data,data_set}() now all exist.
695 Use them to attach user data to the object and retrieve it.
698 - Introduce an experimental Wifi model. It sounds reasonable
699 according to the state of the art, but it still has to be properly
700 validated, at least against ns-3 if not against reality.
701 - Improved the usability of ns-3. Several bugs were ironed out.
702 - host_energy: Wattage was expressed as 'idle:oneCore:allCores'.
703 It is now expressed as 'idle:epsilon:allCores' to properly model the
704 consumption of non-whole tasks on mono-core hosts. More info in the doc.
707 - convert a new set of functions to the S4U C interface and move the old MSG
708 versions to legacy (MSG_process_self*, MSG_process_{un}ref, ...)
711 - Fortran bindings for DVFS have been removed.
712 - Add support for MPI_Irsend, MPI_Rsend, MPI_Rsend_init, MPI_Bsend,
713 MPI_Ibsend, MPI_Bsend_init, MPI_Buffer_attach, MPI_Buffer_detach
714 - SMPI can now be selected by cmake's find_module(MPI) with
715 MPI_C_COMPILER, MPI_CXX_COMPILER, MPI_Fortran_COMPILER variables.
716 - Add support for MPI Errhandlers in Comm, File or Win. Default errhandler is now
717 MPI_ERRORS_ARE_FATAL, so codes which were sending warnings may start failing.
718 - trace-call-location can be used with TI traces, and replayed, and is compatible
719 with smpi/comp-adjustment-file.
720 - sleep events are now correctly traced/replayed.
721 - Default for trace-call-location is now to use file names and not full paths.
722 To revert to previous behavior (in case of collision of filenames), option
723 "smpi/trace-call-use-absolute-path" can be set to yes.
726 - Use the included xxHash as an hash implem when C++14 is usable.
727 - Option model-checker/hash was removed. This is always activated now.
728 - New option smpi/buffering controls the MPI buffering in MC mode.
729 - MPI calls now MC_assert() that no MPI_ERR_* code is returned.
730 This is useful to check for MPI compliance.
733 - New section on plugins: how to define a new one, and existing ones.
736 - xbt_mutex_t and xbt_cond_t are now marked as deprecated, a new C interface
737 on S4U is already available to replace them by sg_mutex_t and sg_cond_t.
740 - Introduce the <disk> tag as a replacement of the <storage>, <storage_type>,
741 and <mount> tags. The rationale is finish to decouple what should be handle
742 by SimGrid kernel (i.e., resources and activities) from plugins built in
743 user space (e.g., the file system plugin). This new tag currently accepts
744 only three attributes (id, read_bw, and write_bw). All the other information
745 that was declared with the storage related tags now has to be expressed as
746 properties. An example of platform using this new tag is available at
747 examples/platforms/hosts_with_disks.xml
750 - 'expect signal' can now accept more than one potential signal.
752 Fixed bugs (FG#.. -> framagit bugs; FG!.. -> framagit merge requests):
753 - FG#28: add sg_actor_self (and other wrappers on this_actor methods)
754 - FG#29 and FG#33: provide a new C API to mutexes and condition variables
755 - FG#30: convert MSG_process_{un}ref to sg_actor_{un}ref
756 - FG#31: per-actor data
757 - FG#34: SG_BARRIER_SERIAL_THREAD?
758 - FG#35: model-checker does not like buster-produced binaries
759 - FG!13: MC: complete workaround in the error msg seen on modern systems
760 - FG!15: execute_flops now logs compute
761 - FG!16: Fix the ns-3 bindings when several flows are simultaneously finishing
762 - FG!17: ns-3: unblock the right number of communications + others issues
763 - FG!18: Improving the performance of the ns-3 bindings
764 - GH#189: Energy consumption of parallel tasks
765 - GH#219: Error in the throughput of TCP transfer
766 - GH!330: Minor polishing of English: Configuring_Simgrid
767 - GH!331: Fix a doc error about actors (Tutorial_algorithms)
768 - GH!332: Add '-O0' flag for: cmake -DCMAKE_BUILD_TYPE=Debug
769 - GH!334: Rework energy plugin, again
771 ----------------------------------------------------------------------------
773 SimGrid (3.23.2) July 8. 2019
776 - Nicer introduction page.
777 - Migrate the "Deploy your application" page to the new doc.
778 - Move Java as a subtree of MSG.
781 - Rename simgrid::TimeoutError to simgrid::TimeoutException.
784 - Drop xbt_dynar_sort_strings().
787 - Really fix FG#26: Turning off a link should raise NetworkFailureException
788 - FG#27: Wrong exception thrown to wait_any when link is turned off
789 - GH#328: Java: Canceling multiple tasks in a single vm/host
791 ----------------------------------------------------------------------------
793 SimGrid (3.23) June 25. 2019
795 The Exotic Solstice Release.
798 - SunOS and Haiku OS support. Because exotic platforms are fun.
799 - Stop setting random seed with srand48() at initialization.
800 - Use addr2line as a fallback for stacktraces when backtrace is not available.
801 - Build option -Denable_documentation is now OFF by default.
802 - Network model 'NS3' was renamed into 'ns-3'.
805 - Simgrid can now hopefully be installed with pip.
808 - wait_any can now be used for asynchronous executions too.
811 - New log appenders: stdout and stderr. Use stdout for xbt_help.
812 - Drop xbt_dict_dump.
815 - 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
816 - MPI/IO is now supported over the Storage API (no files are written or read, storage is simulated). Supported calls are all synchronous ones.
817 - MPI interface is now const correct for input parameters
818 - MPI_Ireduce, MPI_Iallreduce, MPI_Iscan, MPI_Iexscan, MPI_Ireduce_scatter, MPI_Ireduce_scatter_block support
819 - Fortran bindings for async collectives.
820 - MPI_Comm_get_name, MPI_Comm_set_name, MPI_Count support.
823 - Remove option 'model-check/record': Paths are recorded in any cases now.
824 - Remove option 'model-check/sparse-checkpoint': Checkpoints are now
825 always sparse. That's an immense gain in memory, and can even be
826 faster because of cache effects. So there is no need to clutter the
827 code to allow the user to go for the unefficient mode.
830 - Remove the lagrange-based models (Reno/Reno2/Vegas). The regular
831 models proved to be more accurate than these old experiments.
833 Fixed bugs (FG=FramaGit; GH=GitHub -- Please prefer framagit for new bugs)
834 - FG#1: Broken link in error messages
835 - FG#2: missing installation documentation
836 - FG#3: missing documentation in smpirun
837 - FG#6: Python bindings not available on PyPI
838 - FG#7: simple cmake call requires doxygen
839 - FG#8: make python bindings an optional dependency
840 - FG#10: Can not use MSG_process_set_data from SMPI any more
841 - FG#11: Auto-restart actors forget their on_exit behavior
842 - FG#12: -Denable_lto=OFF doesn't disable LTO
843 - FG#13: Installs unstripped file 'bin/graphicator'
844 - FG#14: Installs the empty directory 'doc/simgrid/html'
845 - FG#15: Setting -Denable_python=OFF doesn't disable the search for pybind11
846 - FG#17: Dead link in doc (pls_ns3)
847 - FG#20: 'tesh --help' should return 0
848 - FG#21: Documentation link on http://simgrid.org/ broken
849 - FG#22: Debian installation instruction are broken
850 - FG#26: Turning off a link should raise NetworkFailureException exceptions
851 - GH#133: Java: a process can run on a VM even if its host is off
852 - GH#320: Stacktrace: Avoid the backtrace variant of Boost.Stacktrace?
853 - GH#326: Valgrind-detected error for join() when energy plugin is activated
855 ----------------------------------------------------------------------------
857 SimGrid (3.22) April 1. 2019
859 The Easter Christmas Release (this one is somewhat late).
862 - We are excited to introduce the SimGrid/S4U interface to your neighborhood
863 - Not complete yet: asynchronous activities (amongst others) are still missing
864 - Still ongoing: the interface may change in the future. We need more
865 testers! Please report any glitches.
866 - No new project using Java should start now. Please switch to Python.
869 - Some of the internal cleanups may lead to speed improvements:
870 - The hard limitation on the amount of simulated actors with
871 Java+Mac was removed. Now, the available memory is the only limit.
872 - Our refcounting was tidyied, leading to 10% speedups in some cases.
873 - We are still working on making our code robust to the actor kills
874 and hosts' churn. Things are improving, but it's not perfect yet.
875 - Replaced our own code to display a backtrace (that was forking addr2line)
876 with the Boost.Stacktrace library.
877 You won't see your backtraces without this optional dependency.
878 - Bump cmake dependency to 3.5 (provided by Ubuntu 16.04).
879 - Stop setting random seed with srand() at initialization.
882 - In <host> and <peer>, 'availability_file' is now 'speed_file'.
883 XML file version remains 4.2 since old files are still compatible.
886 - Process termination which was broken at version 3.21 has been repaired.
887 - Expose host load plugin: loadInit, getCurrentLoad, getComputedFlops, getAvgLoad
888 - Hide the examples into examples/deprecated. New users should use Python.
891 - Drop MSG_process_create_from_stdfunc() from the API.
892 This C++ function was a pimple in the C API, made necessary at some
893 point by the Java bindings. This is fixed now.
894 - Hide the examples into examples/deprecated. New users should use S4U.
895 - MSG_process_create and MSG_process_attach now crash if the host used
896 to run this process is off.
897 - Fix the protype of MSG_process_on_exit()
898 Now use (int,void*) callbacks instead of (void*,void*) ones.
899 The implementation was ways too messy to actually work, I guess.
902 - Change the way SMPI_SAMPLE_* macros work to avoid invalidating cache
903 too often and provide more accurate timings.
904 - Add -gdb, -lldb, and -vgdb shortcuts to help debug MPI codes with smpirun
905 - MPI_Alltoallw support
906 - Partial MPI nonblocking collectives implementation: MPI_Ibcast, MPI_Ibarrier,
907 MPI_Iallgather, MPI_Iallgatherv, MPI_Ialltoall, MPI_Ialltoallv, MPI_Igather,
908 MPI_Igatherv, MPI_Iscatter, MPI_Iscatterv, MPI_Ialltoallw.
909 - MPI_Request_get_status, MPI_Status_set_cancelled, MPI_Status_set_elements
911 - Basic implementation of generalized requests (SMPI doesn't
912 allow MPI_THREAD_MULTIPLE) : MPI_Grequest_complete, MPI_Grequest_start
915 - Drop sg_cmdline. Please use xbt_cmdline instead.
916 - Drop the C xbt_os_mutex_t; Use the C++11 std::mutex.
917 - Drop the C xbt_os_sem_t; Use the C++ xbt::OsSemaphore.
918 OsSemaphore is implemented in a portable way with C++11 threads.
919 This should allow much more threads to be created at the same time,
920 allowing Mac and Java users to simulate many more actors.
921 - Implement the 'thread' factory with std::thread instead of xbt ones.
922 It is not possible to set the stack size with threads anymore, but
923 -fsplit-stack is the way to go nowadays when using threads.
924 - Drop the xbt_os_thread_t module (now unused)
925 - Drop xbt_ex_display(), use simgrid::xbt::log_exception() instead.
926 - Drop xbt_str_join_array().
927 - Drop cunit, use Catch2 instead.
930 - Many cleanups in the kernel::activity namespace. This was long
931 overdue, and shall open the path to many future endeavors.
934 - #132: Java: a process can not shut down its own host
935 - #220: S4U: detached send causes exception if sender terminates soon after sending
936 - #261: Document the parameters of parallel execution's constructor
937 - #300: [s4u] BarrierPtr is missing
938 - #314: SMPI args internal cleanup
939 - #316: Fix a bug related to the CPU utilization of multi-core VM
940 - #318: Invalid trace file when using option --cfg=tracing/smpi/display-sizes:yes
941 - #324: S4U: Attempting to create an actor on turned off host segfaults instead of throwing
942 - #325: Turning off a host has different behavior on sleeping actors and computing actors
944 ----------------------------------------------------------------------------
946 SimGrid (3.21) October 3. 2018
948 The Restarting Documentation (TRD) Release.
951 - Convert the user manual to Sphinx for improved usability.
952 Unstable version now hosted on https://simgrid.frama.io/simgrid
953 Many glitches remain; stay tuned.
954 - Restrict the Doxygen reference API to the installed header files.
955 (documenting all internals this way is overkill + doxygen scales badly)
956 - New tutorial on S4U (highly inspired from the old MSG one, but with
957 a git repository to fork as a starting point, and a docker image)
958 - Started but not finished an SMPI tutorial inspired from the JLPC'14 one.
959 - The Developper manual is still to be converted (not compiled until then)
960 - Some parts are still missing in this conversion (such as the
961 platform and deployment sections) while others were blindly converted
962 and would need more love (such as the configuration flags).
963 Things will certainly further improve in the future releases.
966 - Fully reimplement auto_restart mechanism that was utterly broken
967 (fix #22, #131 and #281 that were all very related)
968 - Implement semaphores (fix #303 and #291)
969 - When creating an actor from a function and its parameters,
970 move-only parameters are not allowed anymore, as it would prevent
971 the actor to be restartable if its parameters are consumed on run.
972 - s4u::Io: IOs go asynchronous as activities. New methods in s4u::Storage:
973 - io_init(sg_size_t, s4u::Io::OpType) to create a READ or WRITE asynchronous
974 IO operations that can be started, waited for, or canceled as a regular
976 - read_async(sg_size_t) and write_async(sg_size_t) which are wrappers on
980 - Rename 'power' and 'power_used' variables into 'speed' and 'speed_used'
981 - New host variable: 'core_count'
984 - Remove xbt_os_thread_specific features
985 - Remove portability wrapper to condition variables
986 - Remove xbt_os_thread_yield()
989 - MPICH collective selector now mimics MPICH 3.3b
990 - OpenMPI collective selector now mimics OpenMPI 3.1.2 (default "tuned" setting)
991 - MPI_Init(NULL,NULL) is now allowed
992 - smpi/wtime option now injects time in gettimeofday or clock_gettime calls
993 - Command-line arguments should now be handled properly in Fortran simulations
994 - MPI Attributes and related callbacks should work in Fortran
995 - Apps using C + Fortran should now work
996 - MPI_* calls now check for non MPI_SUCCESS return values and emit warnings
997 - Support MPI_Error_String
1000 - Due to an internal bug, Msg.run() must now be your last line.
1001 We hope to fix it in a future release, and we are sorry for the inconvenience.
1004 - #22: Process autorestart seem to only work with CAS01 cpus
1005 - #56: Feature request: dynamic SMPI replay
1006 - #93: simgrid should not eat --help
1007 - #111: How to change the loopback link characteristics?
1008 - #116: Platform cluster radical
1009 - #117: Platform cluster/host order
1010 - #129: Replay_multiple on steroid
1011 - #131: Java : autostart does not work
1012 - #143: Setting a breakpoint at a given time
1013 - #235: Network energy models should be integrated
1014 - #264: Add ptask L07 resource tracing
1015 - #271: Dynamic and manual replay of SMPI traces
1016 - #279: Breakpoints option uses time deltas instead of absolute time
1017 - #281: Daemonized actor no longer daemonized after an auto-restart
1018 - #282: TIT convertor erase traces when using absolute path in the trace list file
1019 - #285: segfault when a s4u actor kills itself with msg process tracing activated
1020 - #286: Pajé traces are not exposing the number of cores
1021 - #287: Command-line parsing should stop when encountering '--'
1022 - #288: MPI_Init(NULL, NULL)
1023 - #289: Improve documentation of Actor::on_destruction and this_actor::on_exit()
1024 - #290: Method to check if a mailbox has a message ready to be consumed
1025 - #291: [s4u] semaphores do not seem available yet
1026 - #294: Alltoall collective implementation of mpich
1027 - #295: Starting a Host as OFF is not supported
1028 - #296: DTD too permissive
1029 - #299: Add a s4u barrier example
1031 ----------------------------------------------------------------------------
1033 SimGrid (3.20) Released June 24. 2018
1035 The proxy snake_case() release.
1038 - The whole API is now using snake_case() instead of mixing it with camelCase.
1039 Compatibility wrappers in place for one year.
1040 - We took the opportunity to increase the consistency of the API.
1041 Please report any remaining glitches.
1042 - New function simgrid::s4u::Host::get_actor_count:
1043 Returns the number of actors running on a specific host.
1046 - SMPI is now tested with ~45 proxy apps from various sources, with none or
1047 only minor patching needed: check https://github.com/simgrid/SMPI-proxy-apps
1048 - Replay: The replay file has been re-written in C++.
1049 - Replay: Tags used for messages sent via MPI_Send / MPI_Recv are now
1050 supported. They are stored in the trace and used when replayed.
1051 - Basic support of MPI_Cancel. Robustness not guaranteed.
1052 - Support of MPI_Win_allocate_shared, MPI_Win_shared_query, MPI_Comm_split_type
1053 (only for MPI_COMM_TYPE_SHARED).
1054 - New option: smpi/privatize-libs, to add external shared libs to be privatized
1055 by SMPI. They will be copied locally and loaded separately by each process.
1056 Example --cfg=smpi/privatize-libs:"libgfortran.so.3;libscalapack.so".
1057 - Tracing: add tracing for MPI_Start, Startall, Testall, Testany
1058 - Interception of getopt, getopt_long and getopt_long_only calls to avoid issues
1059 with internal index optind with multiple processes. Only works if MPI_Init has
1060 already been called.
1061 - Fortran: SMPI builds a mpi.mod file which should allow use of "use mpi"
1062 syntax without preprocessing tricks.
1065 - Change --cfg=tracing/msg/vm to --cfg=tracing/vm as virtual machine
1066 behavior tracing is no longer limited to MSG
1067 - TIT (Time Independent Traces): We finally support tags. Unfortunately,
1068 this means that traces now need to be updated or re-obtained; both Irecv
1069 and Isend lines in your traces have now in total 5 mandatory fields:
1070 <rankid> <command> <to/from rankid> <tag> <size>
1071 To update your traces, it suffices to add a 0 for the tag here.
1072 - TIT now also supports waiting for a distinct request via MPI_Wait.
1073 Wait/Test now wait for a specific request, not just the last one that was
1074 issued. This unfortunately means another update, because we need to
1075 identify which request you want to wait for. We do this via the
1076 triplet (sender, receiver, tag), which needs to be added:
1077 <rankid> <command> <sender> <receiver> <tag>
1078 - Actions are now in lower case (e.g., "allReduce" becomes "allreduce").
1079 New script simgrid_convert_TI_traces.py: upgrade your TI traces.
1082 - The deprecation of MSG is ongoing (but this should not impact you).
1083 Many MSG functions are now simple wrappers on the C API of S4U. If
1084 you wish to convert your code to S4U, find the S4U counterparts of
1085 your MSG calls in src/msg/msg_legacy.cpp.
1086 - MSG can still be used, but won't evolve anymore.
1089 - Allow to run the Link energy plugin from the command line with
1090 --cfg=plugin:link_energy
1091 - Rename Energy plugin into host_energy
1092 - Rename Load plugin into host_load
1095 - Add parameter --cfg=simix/breakpoint to raise a SIGTRAP at given time.
1096 - kill simix::onDeadlock() that was somewhat dupplicating s4u::on_deadlock()
1097 - Improve performance when handling timeouts of simix synchros.
1100 - Config: the C API is now deprecated (will be removed in 3.23), and
1101 the C++ API has been slightly improved.
1104 - Fix several build issues on OSX.
1105 - Move simgrid_config.h to simgrid/config.h (old header still working)
1108 - #143: Setting a breakpoint at a given time
1109 - #150: Inconsistent event names in SMPI replay
1110 - #258: daemonized actors hang after all non-daemonized actors have completed
1111 - #267: Linker error on unit_tmgr
1112 - #269: SMPI: tracing of MPI_Wait/all/any broken
1113 - SMPI: Fix various crashes with combined use of MPI_PROC_NULL and MPI_IGNORE_STATUS
1115 ----------------------------------------------------------------------------
1117 SimGrid (3.19.1) Released March 22 2018
1119 The Fixed ABI Release.
1121 As you may know, we are currently refactoring SimGrid in deep.
1122 Upcoming SimGrid4 will be really different from SimGrid3: modular,
1123 standard and extensible vs. layered, homegrown and rigid. C++ vs. C.
1125 Our goal is to smooth this transition, with backward compatibility
1126 and automatic update paths, while still progressing toward SimGrid4.
1128 SimGrid remains open during works: The last pure SimGrid3 release was
1129 v3.12 while all subsequent versions are usable alpha versions of
1130 SimGrid4: Existing interfaces remain unchanged, but the new S4U
1131 interface is budding and the internals are deeply reorganized.
1133 Since 2015, we work hard to reduce the changes to public APIs. When
1134 we need to rename a public library symbol in S4U, we let your
1135 compiler issue an explicative warning when you use the deprecated
1136 function. These messages remain for four releases, i.e. for one full
1137 year, before turning into an error. Starting with v3.15, your can
1138 also adapt to API changes with the SIMGRID_VERSION macro, that is
1139 defined to 31500 for v3.15, to 31901 for v3.19.1 and so on.
1141 Starting with this v3.19.1, our commitment to reduce the changes to
1142 the public interfaces is extended from the API to the ABI: a program
1143 using only MSG or SimDag and compiled against a given version of
1144 simgrid can probably be used with a later version of SimGrid without
1145 recompilation. We will do our best... but don't expect too much of
1146 it, that's a really difficult goal during such profund refactoring.
1148 The difference between v3.19 and v3.19.1 is that the former was
1149 accidentally breaking the ABI of MSG, while the later is restoring
1152 S4U and kernel APIs will still evolve until SimGrid4, with one-year
1153 deprecation warnings as currently. In fact, cleaning up these
1154 interfaces and converting them to snake_case() is one release goal of
1155 v3.20. But don't worry, we are working to smooth this upgrade path.
1157 In summary, new projects should start with S4U to benefit of the
1158 future, but old MSG projects should still be usable with no change.
1160 ----------------------------------------------------------------------------
1162 SimGrid (3.19) Released March 20 2018
1164 The Moscovitly-cold Spring release.
1166 SMPI user-visible improvements:
1167 - Support of MPI_Type_create_subarray
1168 - Unimplemented MPI calls now abort (instead of issuing a warning)
1169 Some harmless calls around errhandlers still only issue a warning.
1170 - MPI_Sendrecv was behaving badly when MPI_PROC_NULL was sender or receiver.
1171 - Starting MPI ranks (or even MSG/S4U actors) once the simulation started
1172 is now possible (mmap privatization was refactored to this end).
1173 Adding new SMPI instances should also be technically doable now.
1175 SMPI internal cleanups:
1176 - Removed index notion from SMPI -- no more "getPid() - 1"!
1177 In tracing files, actors are called rank-<PROCESS-ID> but these are
1178 NOT the real ranks (tracing several communicators is not supported yet).
1179 - Deprecate smpi_process_index() (will be removed in 3.22)
1180 - Better testing on classical proxy apps, through an external project:
1181 https://github.com/simgrid/SMPI-proxy-apps/
1184 - Use a graphical TOC to make it easier to find the documentation you need
1185 - Revamp the MSG tutorial
1188 - Fix MSG_task_get_remaining_work_ratio(): return 1.0 for unstarted tasks.
1189 - Remove parameter of MSG_process_killall().
1190 Resetting the PID was bogus anyway (several actors could have the same PID).
1193 - Execution->setHost() can be called after start(), to migrate it.
1194 - Comm::test_any() is now implemented.
1195 - s4u::Actor now has onCreation() and onDestruction() signals.
1196 - Install some kernel header files for the users' plugins and more.
1197 Warning, their API is really not stable yet.
1198 include/simgrid/kernel/resource/{Action,Resource,Model}.hpp
1199 include/simgrid/kernel/routing/*Zone.hpp
1202 - SD_task_dependency_add(): remove unused parameters 'name' and 'data'.
1204 Build System and other cleanups:
1205 - Remove unused run-time parameter "tracing/onelink-only".
1206 - SimGrid now works with intel compilers (MC still buggy)
1207 - Remove XBT_LOG_CONNECT, it should be useless nowadays.
1208 - tesh kills subprocesses on timeout (but not on windows)
1211 - Rename FULLDUPLEX into SPLITDUPLEX (old name still accepted)
1214 - #194: Feature request: simgrid::s4u::Comm::test_any()
1215 - #245: migrating an actor does not migrate its execution
1216 - #253: Feature Request: expose clusters as objects
1217 - #254: Something seems wrong with s4u::Actor::kill(aid_t)
1218 - #255: Tesh broken on Windows
1219 - #256: Modernize FindSimGrid.cmake
1220 - #257: Fix (ab)use of CMake install
1222 ----------------------------------------------------------------------------
1224 SimGrid (3.18) Released December 24 2017
1226 The "Ho Ho Ho! SimGrid 4 beta is coming to town" release.
1228 MSG IS NOW DEPRECATED. Please use S4U for new projects.
1229 - Support for MSG should not be removed from SimGrid before 2020,
1230 but future evolutions will be limited to the integration of
1231 user-provided patches.
1234 - s4u::onDeadlock() signal, run before stopping the simulation.
1235 - s4u::Exec: asynchronous executions (abstraction of background
1237 - s4u::Host->getLoad() returns the achieved speed in flops/s
1240 - Link::name() is deprecated and will be removed in v3.21, use
1241 Link::getCname() instead.
1242 - Mailbox::getName() changed to return a std::string, use
1243 Mailbox::getCname() instead to get a char*.
1244 - Storage::getName() changed to return a std::string, use
1245 Storage::getCname() instead to get a char*.
1246 - s4u::allStorages() becomes s4u::getStorageList(whereTo)
1247 to have both allocation and deallocation of the map in user space.
1250 - Forbid the use of MSG_task_get_flops_amount() on parallel tasks:
1251 The amount of flops remaining to do is a vector, not a scalar.
1252 - Introduce MSG_task_get_remaining_work_ratio(), which does what its
1253 name implies on both sequential and parallel tasks.
1254 - Both changes fix GitHub's #223 using PR #237 as a basis.
1255 Thanks Michael Mercier.
1256 - Most examples were converted to S4U and hidden elsewhere at tests.
1257 Rationale: we still want MSG to work; we want newcomers to use S4U.
1260 - LMM stuff moved to its own namespace: simgrid::kernel::lmm.
1261 - Renamed LMM classes (e.g. s_lmm_system_t -> System).
1264 - Switch to the faster dlopen privatization mechanism by default
1265 - Documentation improvments
1268 - Live migration is getting moved to a plugin. Dirty page tracking is
1269 the first part of this plugin. This imply that VM migration is now
1270 only possible if one this function is called:
1271 - C/MSG: MSG_vm_live_migration_plugin_init()
1272 - C/C++: sg_vm_live_migration_plugin_init()
1273 - Java: Msg.liveMigrationInit()
1274 For C and C++, "simgrid/plugins/live_migration.h" also has to be
1278 - Define class simgrid::xbt::Path to manage file names.
1279 - Removed unused functions:
1280 - xbt/file.h: xbt_basename(), xbt_dirname(), xbt_getline()
1281 - xbt/graph.h: xbt_graph_edge_get_length(), xbt_graph_edge_set_length,
1282 xbt_graph_export_graphviz()
1283 - xbt/str.h: xbt_str_join()
1284 - Remove unused datatypes:
1285 - xbt/heap.h: use std::priority_queue or boost::heap instead
1286 - xbt/swag.h: use boost::intrusive::list instead
1289 - New link_energy plugin for the consumption of the links.
1290 - All of the operations on files and storage contents have been
1291 packaged into a plugin (src/plugins/file_system). The current
1292 public interface can be found in
1293 include/simgrid/plugins/file_system.h
1294 To use these functions you now have to initialize the plugin by
1295 calling MSG_storage_file_system_init() just after calling
1296 MSG_init() or sg_storage_file_system_init() just after creating
1300 - Remove the undocumented/untested tag <include>
1303 - Remove viva specific tracing as the tool is no longer maintained
1306 - #248: Kill of finished processes leads to segfault
1307 - #240: xbt_cond_wait_timeout should gracefully return for C apps
1308 - #239: please implement signal s4u::onDeadlock()
1309 - #230: segfaults when exit() without run()
1310 - #225: s4u::Actor::kill() doesn not really kill victims in a join()
1311 - #223: MSG_task_get_flops_amount() not working with parallel tasks
1312 - #222: Actor::kill() doesn't really kill and segfaults
1313 - #221: odd LMM warning when killing an actor
1314 - #120: Memory leak when the processes are forcefully killed
1316 ----------------------------------------------------------------------------
1318 SimGrid (3.17) Released October 8 2017
1320 The Drained Leaks release: (almost) no known leaks despite the tests.
1322 Even very long simulations will preserve your memory: our testsuite
1323 stresses SimGrid for over 45mn on fast machines for a coverage of
1324 over 80%, and there is only one single known leak, of about 4kb.
1328 - Comm.detach(): start and forget about asynchronous emission. A cleanup
1329 handler may be given to free resources if the comm cannot be completed.
1330 - this_actor::send(mailbox) is now mailbox->put()
1331 - New: simgrid::s4u::Comm::wait_all()
1332 - New: Host.execute() for remote executions.
1335 - Unused option network/sender-gap is removed.
1338 - Deprecate MSG_task_isend_with_matching(): This unused feature
1339 really complicates our internals. Will be removed in v3.20.
1342 - Improved context termination. It is now possible to free resources, even
1343 when a process is forcibly killed.
1344 - ContextBoost: add support for Boost versions above 1.61.
1347 - Bring back run-time option --cfg=exception/cutpath to remove exception
1349 - Removed unused functions:
1350 - xbt/str.h: xbt_str_split_str(), xbt_str_subst(), xbt_str_ltrim(),
1351 xbt_str_rtrim(), xbt_str_trim().
1352 - xbt/xbt_os_thread.h: xbt_os_thread_cancel(), xbt_os_thread_detach().
1355 - Removed header files obsolete since SimGrid 3.12:
1356 msg/datatypes.h, msg/msg.h, simdag/datatypes.h, simdag/simdag.h.
1358 - #3: SD_exit should be made optional
1359 - #120: Memory leak when the processes are forcefully killed
1360 - #159: Threading test regression in Actor refcounting
1361 - #170: simgrid::s4u::Comm::wait_any() returns too many comms
1362 - #185: simgrid::s4u::Engine::instance()->shutdown() segfaults
1363 - #186: Actor::killAll() segfaults if some process is blocked on wait()
1364 - #191: VM migration and pstate
1365 - #192: Updating the energy consumptions of all hosts crashes with VMs
1366 - #195: All actors have PID=0 in the logs
1367 - #204: Sometimes segfault with thread contexts and mmap privatization
1368 - #222: Actor::kill() doesn't really kill and segfaults
1369 - #225: Actor::kill() doesn't really kill when victims are doing a join()
1371 ----------------------------------------------------------------------------
1373 SimGrid (3.16) Released June 22. 2017.
1375 The Blooming Spring Release: developments are budding.
1378 - FreeBSD: Disable SMPI mmap privatization, switch automatically to dlopen.
1379 - Mac, BSD: dlopen+thread broken, switch automatically to raw contexts.
1380 - Java JAR file should be finally fully working on Mac OSX too.
1382 XML platforms: Switch to platform v4.1 format.
1383 * This is (mainly) a backward compatible change: v4 are valid v4.1 files
1384 - <zone> can be used as a synonym for the now deprecated <as>
1385 - <zoneRoute> can be used as a synonym for the now deprecated <asroute>
1386 - <bypassZoneRoute> can be used as a synonym for the now deprecated <bypassAsRoute>
1387 - <actor> can be used as a synonym for the now deprecated <process>
1388 - state_file and avail_file periodicity is now easier to express
1389 (check the documentation) the old behavior should still work.
1390 * Storage: not backward compatible, but it seems that nobody ever used it
1391 - Remove attribute 'content_type' of <storage_type>: was never used
1392 - Make attribute 'model' of <storage_type> optional: for future usage
1393 - Remove Bconnection model property: was never (in)validated. Replaced by
1394 the maximum of the read and write bandwidth as a resource constraint.
1397 - New and Backwards Compatibility break:
1398 SD_simulate_with_update (double how_long, xbt_dynar_t changed_tasks_dynar)
1399 When one wants to get the list of tasks whose states have changed during a
1400 simulation round, s/he has to allocate and free a dynar and use it as
1401 argument to this function. The former SD_simulate (double how_long)
1405 - Allow multicore VMs, with the correct sharing (unless you overcommit)
1406 BUG: vCPU overcommitting still leads to buggy sharing, though. WIP.
1409 - New function to update the consumption of all hosts at once.
1410 - Fix the model for multi-core hosts, linear in the amount of busy
1411 cores with an abnormality for pIdle (see paper).
1412 BUG: Still not satisfactory for ptask on mono-cores.
1415 - The netzone are now available from the MSG API.
1416 The old names still work, but are now deprecated.
1419 - New algorithm to privatize globals: dlopen, with dynamic loading tricks
1420 - New option: smpi/keep-temps to not cleanup temp files
1421 - New option: smpi/shared-malloc-blocksize . Relevant only when global shared
1422 mallocs mode is used, allows to change the size of the fake file used
1423 (default 1MB), to potentially limit the number of mappings for large runs.
1424 - Support for sparse privatized malloc with SMPI_PARTIAL_SHARED_MALLOC()
1425 - Fortran ifort and flang compilers support
1426 - New RMA calls supported (experimental):
1427 - MPI_Win_allocate, MPI_Win_create_dynamic, MPI_Win_attach
1428 - MPI_Win_detach, MPI_Win_set_info, MPI_Win_get_info
1429 - MPI_Win_lock_all, MPI_Win_unlock_all, MPI_Win_flush
1430 - MPI_Win_flush_local, MPI_Win_flush_all, MPI_Win_flush_local_all
1431 - MPI_Op_commutative, MPI_Fetch_and_Op, MPI_Compare_and_swap
1432 - MPI_Rput, MPI_Rget, MPI_Raccumulate, MPI_Rget_accumulate
1435 - New: this_actor::isMaestro() returns whether we are in kernel mode.
1436 - Behind the scene, ActivityImpl are now automatically refcounted.
1437 Removing this nasty bottleneck will greatly simplify our internals.
1440 - Replay: New function xbt_replay_action_get():
1441 Retrieve the function previously associated to an event type.
1442 - DROPPED FUNCTION: xbt_str_varsubst()
1443 - DROPPED MODULE: strbuff. We don't need it anymore.
1444 - DROPPED MODULE: matrix. We don't need it anymore.
1445 - DROPPED MODULE: lib. We don't need it anymore.
1447 -- Thu Jun 22 22:48:12 CEST 2017 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1449 SimGrid (3.15) Released March 22. 2017
1451 The Spring Release: continuous integration servers become green
1452 We fixed even the transient bugs on all target architectures:
1453 Linux (CentOS, Debian, Ubuntu, Fedora), Mac OSX (Mavericks, El Capitan)
1454 Windows, FreeBSD, NetBSD.
1456 - Rename NetCards to NetPoints.
1457 This was intended to help NS3 users, but that's not a netcard.
1458 That's a point in the routing algorithm, let's avoid wrong simplifications.
1461 - New: MSG_process_yield(). Stop and yield to other processes.
1462 - New: MSG_process_daemon(). Daemon processes are automatically killed
1463 when the last non-daemon process terminates
1464 - New: MSG_process_ref/unref(). Fiddle with the process refcounting.
1465 - Renamed MSG_energy_plugin_init() -> MSG_host_energy_plugin_init()
1466 to make room for the upcoming network energy plugin.
1467 - Drop MSG_host_get_current_power_peak: duplicates MSG_host_get_speed
1470 - Ensure that an actor can kill itself with Process::exit()
1471 - Kill the obscure NativeException. Nobody want to survive the issues
1472 it denotes, so use JniException that is a RuntimeException (not to
1473 be caught explicitly).
1474 - Partial bug fix in initialization. SimGrid flags on command line were
1475 consumed at C level but stayed in the original Java String[] args.
1476 This could mess users' args[i] if SG flags were not put at the end of
1478 The SimGrid flags are now removed from the Java arguments. However,
1479 the number of arguments REMAINS UNCHANGED. It is then UNSAFE to test
1480 if args.length is greater than the number of YOUR OWN ARGUMENTS.
1481 It might be if you have --log or --cfg flags in the command line.
1482 - Fix numerous memleaks all around the place. In particular, around VMs.
1486 - s4u::onPlatformCreated: right before the simulation starts
1487 - s4u::onSimulationEnd: right after the main simulation loop
1488 - s4u::onTimeAdvance: right after a clock change (time is discrete)
1489 - s4u::Host::onSpeedChange: when the pstate is changed, or when an
1490 event from the availability_file changes the avail speed.
1491 - Links are now usable from s4u
1492 - New: Engine::hostList() and Engine::hostCount(). Still clumsy.
1493 - New: Actor::suspend(), Actor::resume(), and Actor::migrate(new_host)
1494 - New examples: The conversion of MSG examples to S4U has begun
1495 - Actors: create, kill, migration, and suspend
1496 - Applications: master-worker and token-ring
1497 - Action replay: communications and storage
1498 - Drop Host::getPstateSpeedCurrent() which duplicates Host::speed()
1501 - Backwards Compatibility breaks
1502 - The SD_route_get_list and SD_route_get_size functions have been removed.
1503 They are replaced by the unique
1504 void sg_host_route(sg_host_t src, sg_host_t dst, xbt_dynar_t links)
1505 The route from src to dst is built in the links dynar whose size can
1506 be obtained with xbt_dynar_length.
1507 - The SD_route_bandwidth and SD_route_latency functions have been replaced by
1508 sg_host_route_bandwidth and sg_host_route_latency.
1509 Macros ensure the backwards compatibility, but you should fix your code
1512 - Major C++ rewrite ongoing (SMPI used to be C compiled in C++).
1513 This can break codes using SMPI internals (from private.h instead of the public smpi.h).
1514 - Bump our claim of support from MPI 1.1 to MPI 2.2.
1515 We don't support 100% of it, but it should be enough. Contact us if not.
1516 - MPI_Win_lock/unlock, MPI_Get_accumulate support added (as for all RMA, implementation is
1517 naive and probably inaccurate)
1518 - New algorithm for SMPI_SHARED_MALLOC: global, where all blocks are
1519 mapped onto a unique small file using some system magic.
1520 - Bugfix: smpirun was sometimes misusing hostfile when wrongly terminated
1521 - Fortran: cleanups, fixes, support of user-added operations
1522 - RMA: MPI_Accumulate are applied in correct order.
1523 - RMA: MPI_Win_{complete/post} shouldn't miss messages anymore.
1524 - Better support for MPI_IN_PLACE
1525 - Support for MPI_Win attrs and keyvals.
1526 - Support MPI_Comm_group_create, MPI_Type_size_x
1527 - MPI ops should be properly applied to all allowed types
1528 - Replace implementation of MPI_Bcast "scatter followed by rdb allgather"
1529 algorithm by a non failing one from mpich.
1532 - Kill the fifo data container: we don't use it anymore.
1535 - A <cluster> can now be created with different speed values to represent pstates.
1536 see examples/platforms/energy_cluster.xml for an example.
1538 SimGrid (3.14.159) Released December 28. 2016
1540 The previous release was only a crude approximation of a Pi release;
1541 this one should be a bit better.
1543 - Revert a last minute change that broke on Mac OSX.
1544 - Fix the changelog and NEWS files.
1545 - Improve the documentation, in particular of the routing module.
1546 - Integrate some patches flying around in Debian.
1548 SimGrid (3.14) Released December 24. 2016
1551 * The whole documentation was reworked and reorganized. There is
1552 still much room for improvement here, but we're on it.
1555 * We now need python3 for our testing infrastructure.
1556 * Model checking needs libevent
1559 * Now works on FreeBSD
1562 * Privatization now works on FreeBSD
1564 * Privatization is now activated by default in smpirun
1565 You can turn it off with -no-privatize if something goes wrong.
1567 * Call-location tracing for SMPI.
1568 You can add the exact location (filename / linenumber) of an MPI call to
1569 your trace files and slow down or speed up the simulation between two
1570 consecutive calls by using an adjustment file (see the documentation).
1572 * Fixed computation of timings for MPI_Send, MPI_Recv & possibly also others
1573 We've found a bug that prevented SMPI to account for MPI_Send, MPI_Recv
1574 and others (in some cases) in a correct way. That is, the smpi/os, smpi/or
1575 values were ignored in some cases. The timings of these functions can now
1576 be significantly different.
1578 * smpi/cpu-threshold:-1 should become smpi/simulate-computation:no
1579 smpi/running-power is renamed to smpi/host-speed
1581 * smpi/grow-injected-times option to enable or disable multiplication of the
1582 timings injected in MPI_Iprobe, or MPI_Test. Enabled by default, which can
1583 make simulation less precise (but also much faster).
1585 * smpirun script should be (much) faster for large deployments.
1587 * SMPI tracing: fixed issue with poor matching of send/receives.
1589 * Replay: Fix broken waitall
1591 New functions and features
1592 * MSG_parallel_task_execute_with_timeout, to timeout computations.
1594 Dropped / renamed functions and features
1595 * msg_mailbox_t and associated functions. Use s4u::Mailbox instead.
1596 - MSG_mailbox_is_empty() -> Mailbox::empty()
1597 - MSG_mailbox_front() -> Mailbox::front()
1598 - MSG_mailbox_get_by_alias() -> simgrid::s4u::Mailbox::byName(name)
1599 - MSG_mailbox_get_task_ext() -> MSG_task_receive_ext()
1600 - MSG_mailbox_get_task_ext_bounded -> MSG_task_receive_ext_bounded
1601 - MSG_host_(get/set)_params -> MSG_vm_(get/set)_params
1602 * Don't pass the free_f parameter to property related functions:
1603 - MSG_host_set_property_value()
1604 - MSG_as_router_set_property_value()
1605 - MSG_storage_set_property_value()
1606 * VM properties. Since msg_vm_t are msg_host_t, just use
1607 MSG_host_get_property_value() and friends
1608 * VM I/O related things:
1609 - Ignored parameter of vm_create: core_nb, disk_path and disk_size.
1610 - Unimplemented save/restore methods
1611 * MSG_as_router_get_property_value() was redundant with
1612 MSG_environment_as_get_property_value().
1613 - Removed MSG_as_router_*propert*() functions
1614 - Added MSG_environment_as_set_property_value() for consistency
1615 * xbt heterogeneous dictionaries (created with xbt_dict_new()).
1616 Well, they are still there for now, but deprecated with a warning.
1617 Please switch to xbt_dict_new_homogeneous() before this is removed
1619 * Task affinity. Its intended behavior (that was very badly tested
1620 and probably not really working) was deceiving what most users
1621 would have hoped here.
1622 * xbt_os_sem_get_value: unused internally, deprecated on OS X El Capitan
1623 * Option network/coordinates is now useless and should be dropped.
1626 * Added option storage/max_file_descriptors to allow more than 1024 files opened
1629 * Added option maxmin/concurrency_limit to allow more than 100 processes per host
1630 * Added Dragonfly topology support
1633 * Add Exa- and Peta- units such as EiB, EB, Eib, Eb for size, and
1634 EiBps, EBps, Eibps, Ebps for bandwidth.
1635 They may become useful to some lucky ones.
1638 * New functions: msg.Comm.waitAll() and msg.Comm.waitAny()
1639 * ex/app_tokenring: new example, very similar to the MSG Token Ring
1640 * ex/async_waitAll: new example, on asynchronous communications
1643 * Memory usage should be decreased for simulations with a large number
1644 of processes. This also helps for SMPI.
1646 SimGrid (3.13) stable; urgency=low
1648 The Half Release, a.k.a. the Zealous Easter Trim.
1650 - We removed half of the lines, that were mostly experimental cruft.
1651 v3.12 lasted 286000 lines of code, v3.13 is only 142000 lines
1652 (not counting blanks and comments -- according to openhub.net)
1653 - The internals are now compiled in C++ (and will soon be clean C++)
1654 - We removed 75 klines of XML, 12 klines of Java, 5 klines of cmake,
1655 59 klines of C, etc. We added only 29 klines of C++ in replacement.
1657 * Backwards Compatibility breaks
1658 - Removed Lua simulation bindings (switch to C or Java for that).
1659 Lua can still be used to describe platforms
1660 - Removed Java kernel plug-ins.
1661 Will be reintroduced after the ongoing major internals reorg.
1663 - the following functions were removed.
1664 They were too specific and should be reimplemented in a generic
1665 way, with filter function.
1666 - MSG_task_listen_from_host
1667 - MSG_mailbox_get_count_host_waiting_tasks
1668 - MSG_mailbox_put_with_timeout was removed.
1669 Please use MSG_task_send_with_timeout instead.
1671 - the SD_application_reinit function was removed. It has been a noop for a while.
1672 - The ACCESS_MODE of SD_workstation has been removed. This feature was not really usable and should soon be
1673 replaced by a more flexible mechanism.
1674 - The following functions thus do not exist anymore
1675 - SD_workstation_get_access_mode
1676 - SD_workstation_set_access_mode
1677 - SD_workstation_get_current_task
1678 - Basic estimation functions have been removed but can easily be replaced
1679 - SD_route_get_communication_time => SG_route_get_latency() + amount / SD_route_get_bandwidth()
1680 - SD_workstation_get_computation_time => amount / sg_host_speed()
1682 - VM.setBound(int load) is now VM.setBound(double bound) to meet the MSG semantics.
1683 Use VM.getSpeed()*load/100 for the legacy behavior.
1685 - option enable_tracing was removed. It was not doing anything for a while.
1686 - In the ModelChecker:
1687 - the model-checker now ptraces the model-checked process which means
1688 you cannot use a debugger on the latter anymore (we might make this
1689 optional in the feature);
1690 - removed soft-dirty page tracking;
1691 - remove model-checked side snapshot management,
1692 MC_snapshot() and MC_compare_snapshot();
1693 - keep the MC_cut() function as a stub (it was not really working
1694 in the previous release).
1697 * All options are consistently in kebab-case. Old names are kept as alias.
1700 * Switch to platform v4 format.
1701 - Rename from 'power' to 'speed' the attributes describing the amount of
1702 flops that a <host>, <peer>, <cluster> or <cabinet> can deliver per second.
1703 - In <trace_connect>, attribute kind="POWER" is now kind="SPEED".
1704 - In <host> and <link>, attributes availability and state are gone.
1705 It was redundant with state and availability traces, and with peak values.
1706 - In <cluster>, attributes availability_file and state_file are gone.
1707 It was too complex and unused.
1708 - Kill <gpu>. Was not doing anything.
1709 - The DOCTYPE points to the right URL:
1710 http://simgrid.gforge.inria.fr/simgrid/simgrid.dtd
1711 (the file at this address now documents the changelog since its v1)
1712 - A warning is emitted for unit-less values (they are still accepted).
1713 - speed. Default: 'f' or 'flops'. Also defined:
1714 'Yf', 'Zf', 'Ef', 'Pf', 'Tf', 'Gf', 'Mf', 'kf'
1715 'yottaflops', 'zettaflops', 'exaflops', 'petaflops', 'teraflops', 'gigaflops', 'megaflops', 'kiloflops'
1716 - bandwidth. Default: 'Bps' bytes per second (or 'bps' for bits but 1 Bps = 8 bps)
1717 Also defined in bytes: 'TiBps', 'GiBps', 'MiBps', 'KiBps', 'TBps', 'GBps', 'MBps', 'kBps', 'Bps'
1718 And the same in bits: 'Tibps', 'Gibps', 'Mibps', 'Kibps', 'Tbps', 'Gbps', 'Mbps', 'kbps', 'bps'
1719 - latency. Default: 's' second. Also defined:
1720 'w' week, 'd' day, 'h' hour, 'm' minute, 'ms' millisecond, 'us' microsecond, 'ns' nanosecond, 'ps' picosecond
1722 * bin/simgrid_update_xml can upgrade your files automatically (won't convert unit-less values)
1723 tools/sg_xml_unit_converter.py may help (but it's just a warning and will probably ever be).
1726 * s4u::Host is now the preferred public interface to the Host features.
1727 sg_host_* functions are C bindings to the exact same behavior
1728 MSG_host_* and SD_workstation_* are #define to the sg_host_* ones
1731 * The examples were completely reorganized (in C and Java), for your browsing pleasure.
1732 * Kill all deprecated functions (the ones you had when declaring MSG_DEPRECATED).
1733 They were deprecated since a few years, and probably did not even compile anymore.
1736 * The API has been profoundly modified to directly use the core objects instead of redefining its own.
1737 SD_Workstation_t and SD_link_t are now sg_host_t and sg_link_t respectively.
1738 Some functions have also been renamed for consistency. Backward compatibility is maintained, but users are
1739 encouraged to update their codes. A list of the modified functions can be found at the end of
1740 include/simgrid/simdag.h
1743 * simgrid::simix::kernelImmediate() is the closure callback. It ensures that
1744 the lambda or closure passed as a parameter will run in kernel mode.
1745 All the callback functions should be rewritten to that interface at some point.
1748 * Reorganizing and cleaning the internals all around the place.
1751 * Remove old default barrier/bcast buggy algorithms (see #18407)
1752 * Various bug fixes to handle more codes
1753 * Remove the need for the --foreground option of smpirun (it is still
1754 accepted for backward compatibility).
1757 * Kill the setset data container: MC don't use it anymore.
1758 * Kill the queue data container: it made more sense with GRAS.
1759 * Kill the xbt_peer_t data type: it's useless without GRAS.
1760 * Kill rm_cb feature of config sets: it was never useful.
1761 * Kill graphxml parsing feature. It was not used.
1762 * Kill the deprecated code protected by XBT_USE_DEPRECATED
1764 - xbt_dynar_sort_strings(), when the content is char*
1765 - xbt_str_parse_int / xbt_str_parse_double, wrapping strtol/strtod
1766 They throw exceptions on invalid input;
1767 * C++ support for declaring CLI flags (simgrid::config::Flag);
1768 * class for abstracting different signal backends (simgrid::xbt::signal).
1769 with no external dependencies (we need very simple signals).
1772 * refactoring and cleanup of the code;
1773 * ongoing process to cleanly separate the model-checking algorithms
1774 from the code model-checking support.
1776 -- Wed Apr 27 21:00:53 CEST 2016 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1778 SimGrid (3.12) stable; urgency=low
1780 The Facelift Release.
1783 * Require g++ v4.7 at least to not speak prehistorical C++.
1784 * Require Boost 1.48 (for signal2 component).
1785 * Java must be version 7 at least when activated.
1786 * Builds on Windows again (including Java bindings).
1787 * Tracing is now always enabled (no way to turn it out)
1788 * Remove GTNetS. It was not working anyway.
1789 * Various cleanups in the cmake scripts.
1790 * Move headers around to sort them out on installed systems:
1791 - instr/instr.h -> simgrid/instr.h
1792 - instr/jedule/* -> simgrid/jedule
1793 - simdag/datatypes.h was removed
1794 - simdag/simdag.h -> simgrid/simdag.h
1795 - msg/datatypes.h was removed
1796 - msg/msg.h -> simgrid/msg.h
1799 * Interface improvement:
1800 - Rename MSG_host_is_avail(h) to MSG_host_is_on(h)
1801 - Sanitize the interface in MSG_task_ module:
1802 - Merge two functions that were close enough but misleading:
1803 set_compute_duration(t) -> set_flops_amount(t)
1804 get_remaining_computation(t) -> get_flops_amount(t)
1805 - set_data_size(t) -> set_bytes_amount(t)
1806 get_data_size(t) -> get_bytes_amount(t)
1807 - Massive cleanups in the functions related to the energy
1808 - MSG_host_get_pstate_number() -> MSG_host_get_nb_pstates()
1809 - New: MSG_host_get_pstate()
1811 - msg/energy/onoff: switching hosts on and off
1813 * Interface improvement:
1814 - Rename Host.isAvail() to Host.isOn()
1815 - Rename Process.currentProcess() to Process.getCurrentProcess()
1816 - Rename Task.setDataSize() to Task.setBytesAmount()
1817 - Merge Task.getRemainingDuration() and Task.getComputeDuration() into Task.getFlopsAmount()
1819 - #18874: Actually allows the GC to reclaim tasks
1823 - SIMIX_process_throw: raises an exception in a remote process
1824 * Refactoring: Separate sub-modules
1825 - libsmx: the public interface, as libc in a real system
1826 - popping: the strange dance that converts a user request into a kernel handling
1827 - smx_context_*: the virtualization mechanisms that embed the user code
1828 - smx_*: the handling of each simcalls
1829 * Interface cleanup:
1830 - simcall_host_set_power_peak_at -> simcall_host_set_pstate
1831 * Rename smx_action_t into smx_synchro_t, making explicit that these
1832 things are used to synchronize processes with their environment.
1833 For example, a communication is a sort of synchronization involving
1834 the communicating processes (that may block until the exchange) and
1835 the platform. The same can be said from computations, etc.
1837 - #18888: segfault when a process ends before its kill_time
1841 - 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.
1842 - MPI_Keyval*, MPI_Attr* functions, as well as MPI_Comm_attr*, MPI_Type_attr* variants (C only, no Fortran support yet)
1843 - MPI_Type_set_name, MPI_Type_get_name
1844 - MPI_*_c2f and MPI_*_f2c functions
1845 - MPI_Info_* functions (beware, get_nthkey may not follow the insertion order)
1846 - MPI_Pack, MPI_Unpack and MPI_Pack_size functions
1847 - Activate a lot of new tests from the mpich 3 testsuite
1849 - Constant times can be injected inside MPI_Wtime and MPI_Test through options smpi/wtime and smpi/test
1850 - InfiniBand network model added: Based on the works of Jerome Vienne
1851 http://mescal.imag.fr/membres/jean-marc.vincent/index.html/PhD/Vienne.pdf
1852 - When smpi/display_timing is set, also display global simulation time and application times
1853 - Have smpirun, smpicc and friends display the simgrid git hash version on --git-version
1854 * Collective communications
1855 - 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
1856 - 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/).
1857 - Support for Rabenseifner Reduce/Allreduce algorithms (https://fs.hlrs.de/projects/par/mpi//myreduce.html)
1859 - Replay now uses algorithms from wanted collective selector
1860 - Replay can be used with SMP-aware algorithms
1861 - Memory occupation of replay should now be contained (temporary buffers allocated in collective algorithms should be shared between processes)
1862 - 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.
1864 - [#17799]: have mpi_group_range_incl and mpi_group_range_excl better test some corner cases
1865 - Correctly use loopback on fat-tree clusters
1866 - Asynchronous small messages shouldn't trigger deadlocks anymore
1867 * Energy/DVFS cleanup and improvement
1868 - smpi_set_host_power_peak_at() -> smpi_set_host_pstate()
1869 - new: smpi_get_host_pstate()
1872 - "Full" network optimization flag was broken since Surf++
1873 - Better handling of precision flags in maxmin
1874 - Fix bug causing sometimes "Impossible" errors
1875 - Properly pass cluster properties to included hosts
1876 * Improvement of the Energy plugin.
1877 - Always update the consumption before returning that value
1878 - New property: watt_off to denote the dissipation when the host is off
1879 - New functions getWattMinAt and getWattMaxAt to retrieve the
1880 dissipation of pstates that we are not currently at.
1881 * Java: class NetworkLink renamed to Link
1882 * New function: simcall_process_get_kill_time()
1883 * Massive rename s/workstation/host/
1884 - That's intrusive, but that's good for the project consistency. Sorry.
1885 - Change config option "workstation/model" into "host/model"
1888 - Add a xbt_heap_update function, to avoid costly xbt_heap_remove+xbt_heap_insert use
1889 - Add a xbt wrapper for simcall_mutex_trylock (asked in [#17878])
1890 - Add two new log appenders: rollfile and splitfile. Patch by Fabien Chaix.
1891 - xbt_dirname and xbt_basename for non-POSIX systems
1893 * The model checker now runs as a separate process.
1894 * The model checker runs must now be launched with the new simgrid-mc program.
1895 * Record/Replay: the MC can display a textual representation of a path in the
1896 execution graph. It can then be replayed outside of the model checker.
1898 -- Mon Oct 12 06:02:41 CEST 2015 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1900 SimGrid (3.11) stable; urgency=low
1905 * Normalizing pointers addresses tool for better diff between logs
1908 * Add cloud examples using new VMs
1909 - examples/msg/cloud/two_tasks_vm.tesh
1910 - examples/msg/cloud/simple_vm.tesh
1911 - examples/java/cloud/cloud.tesh
1912 - examples/java/cloud/migration/migration.tesh
1913 * Add java surf examples:
1914 - examples/java/surfPlugin/surf_plugin.tesh
1915 - examples/java/reservationSurfPlugin/reservation_surf_plugin.tes
1916 - examples/java/surfCpuModel/surf_cpu_model.tesh
1917 * Add SMPI+MSG example:
1918 - examples/smpi/smpi_msg_masterslave/
1923 - msg task destroy cancel test
1924 - msg_host on/off test
1925 * Move all tests in testsuite to teshsuite (adding tesh files)
1926 * Restructure teshsuites
1927 - one folder for each kind of test
1928 * Restructure AddTests.cmake
1930 - structure the order of tests (with sections)
1933 * Add virtual machine
1934 - creation of a VM on a PM
1935 - migration of a VM from a PM to another PM
1937 - MSG_process_join(msg_process_t process, double timeout)
1938 - msg_bar_t MSG_barrier_init(unsigned int count)
1939 - int MSG_barrier_wait(msg_bar_t barrier)
1940 - void MSG_barrier_destroy(msg_bar_t barrier)
1941 - msg_as_t MSG_environment_as_get_by_name(const char * name)
1942 * New option "msg/debug_multiple_use" to help debugging when a task is used
1945 - Improvements and finalization of MSG_storage, MSG_file APIs and their
1947 - Increase code coverage in test suites
1951 * Protect context stacks against stack overflow. The number of protected memory
1952 pages allocated on the top of each stack (1 by default) can be configured
1953 with the new command line option --cfg=contexts/guard_size:<value>.
1954 * Simcalls are now generated by a python script that
1955 - generates files included by SimGrid
1956 - checks that all the functions exist, and proposes prototypes
1958 - remove sem_destroy, file_set_data, comm_destroy, vm_set_state,
1959 host_set_data, host_get_data
1961 - simcall_process_join(smx_process_t process, double timeout)
1962 * Fix bug where sleeping processing could not be suspended.
1965 * Translate surf models from C to C++
1966 - Generic classes for all models: Model, Resource, Action
1967 - A generic interface for each kind of model (CPU, Network, Storage
1968 Workstation, WorkstationVM)
1970 * Translate surf routings from C to C++
1971 * Add callbacks using sigc++ or boost::signals2
1972 - Add callback functions for resource creation/destruction
1973 - Add callback functions for action state change
1974 - Handle Energy as a plugin
1975 * Replace swag by boost::intrusive
1976 * Add new routing models for clusters. For documentation, see
1977 http://simgrid.gforge.inria.fr/simgrid/latest/doc/platform.html#pf_cluster
1978 - tori, with topology="TORUS" and topo_parameters="ndim1,ndim2,...,ndimn"
1979 parameters for cluster tag
1980 - Fat trees, with topology="FAT_TREE" and
1981 topo_parameters="h;m1,...,mh;w1,...,wh;p1,...,ph" parameters for cluster tag
1982 - see examples/platforms/torus_cluster.xml and
1983 examples/platforms/fat_tree_cluster.xml
1984 * More documentation
1987 * Hostfiles support host:nb_processes construct to deploy several processes on
1989 * Collective communication algorithms should not crash if used with
1990 improper number of nodes and report the error.
1991 * SMPI now partially supports MPI_Topologies: MPI_Cart_create, MPI_Cart_shift,
1992 MPI_Cart_rank, MPI_Cart_get, MPI_Cart_coords, MPI_Cartdim_get,
1993 MPI_Dims_create, MPI_Cart_sub are supported.
1994 * New interface to use SMPI programmatically (still depends on MSG for
1995 some parts, see examples/smpi/smpi_msg_masterslave):
1996 - SMPI_app_instance_register(const char *name, xbt_main_func_t code,
2000 * Global variables privatization in MPI executables is now performed at runtime
2001 with the option smpi/privatize_global_variables (default:no).
2002 Limitations: Linux/BSD only, with mmap enabled. Global variables inside
2003 dynamic libraries loaded by the application are not privatized (static
2004 linking with these libraries is advised in this case)
2007 * Options defined in XML work correctly now.
2010 * New cmake option, enable_lib_in_jar, to control whether native libraries are
2011 copied into simgrid.jar or not (ON by default). Use this option if you want
2012 to reduce the size of the installed simgrid.jar, *and* the native libraries
2013 are kept installed elsewhere.
2014 * Surf binding with SWIG (code generated in maintainer mode only):
2015 - plugin to handle callbacks
2016 - CPU model only for the moment
2019 * Supernovae build mode is definitively removed. It was used to improve
2020 inlining and inter-module optimizations. It is nowadays superseded by
2021 link-time optimizations commonly available in compilers.
2022 * Update ns-3 find lib. Bindings for ns-3 should work again now.
2023 * Add boost dependency for surf++
2024 * Add new macro for tests
2025 - ADD_TESH(name <tesh_args>)
2026 - ADD_TESH_FACTORIES(name "thread;ucontext;raw" <tesh_args>)
2030 - xbt_bar_t XBT_barrier_init(unsigned int count)
2031 - int XBT_barrier_wait(xbt_bar_t barrier)
2032 - void XBT_barrier_destroy(xbt_bar_t barrier)
2033 * Make the xbt_os_time module public
2035 -- Sat May 31 22:39:38 CEST 2014 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2037 SimGrid (3.10) stable; urgency=low
2039 The Clean Diaper Release, a.k.a. SimGrid is leak-free.
2042 * Reintegrate Java to the main archive as desynchronizing these
2043 package is not acceptable anymore (Java is now considered stable)
2044 * Add explicit synchronization facilities through semaphores
2045 * Bug fix: Task.setDataSize() only changed the C world, not the value
2046 cached in the Java world
2049 * Dramatically change the way files are handled. API and internals changed, but
2050 this part of MSG was not considered as production grade either.
2051 * Add explicit synchronization facilities through semaphores
2052 * Add a new function MSG_host_get_process_list()
2053 * Preliminary DVFS support (see examples/msg/energy/ for details)
2056 * SMPI is now included directly in the libsimgrid as the windows
2057 linker doesn't force us on splitting it anymore.
2058 * Improvements of the SMPI replay tool:
2059 - Most of the collective communications are now rooted in the same process as
2060 in the original application.
2061 - Traces now rely on the same MPI data type as the application (MPI_BYTE was
2062 used until now). Multiple data types can now be used in a trace.
2063 - The replay tool now supports traces produce either by TAU or a modified
2065 - Bug Fix: the compute part of the reduce action is now taken into account.
2066 - Gatherv collective is now supported
2067 - SimGrid (SMPI for now) can generate replay traces as well. Option -trace-ti
2068 of smpirun outputs time independent traces for the current run. One file
2069 is created per process. If too many processes are simulated, this behavior
2070 can be changed to one file for all processes by using the
2071 tracing/smpi/format/ti_one_file flag
2072 * smpirun generates the host file if needed (with given host count and platform)
2073 * Integration of more than 100 STAR-MPI, MPICH, OpenMPI collective algorithms
2074 - allows to select one in particular with --cfg=smpi/coll_name:algorithm
2075 - allows to use the decision logic of OpenMPI(1.7) or MPICH(3.0.4) by setting
2076 --cfg=smpi/coll_selector:(mpich/ompi)
2077 * Support for new functions: MPI_Issend, MPI_Ssend, Commutative operations in
2079 * Add a --cfg:tracing/smpi/internals option, to trace internal communications
2080 happening inside a collective SMPI call.
2081 * Fix the behavior of complex data types handling.
2082 * Make MPI_Wtime another synchronization point to take computations into
2084 * Replace MPICH-1 test suite by the one from MPICH 3.0.4. Can be built using
2085 enable_smpi_MPICH3_testsuite flag in cmake. Run with ctest.
2086 * Add all missing Fortran bindings, SMPI should work with Fortran 90
2087 (no privatization of global variables yet)
2088 * Preliminary DVFS support (see examples/smpi/energy/ for details)
2091 * Verification of liveness properties is now available for SMPI applications
2092 (in addition to MSG applications)
2093 * Bugged examples using SMPI in examples/smpi/mc/
2094 * Add --cfg=model-check/visited option. Allows the verification of infinite
2095 programs. Detection of loops in the execution thanks to the system state
2096 comparison and reduction of the state space to explore. Can be combined with
2097 DPOR for safety properties.
2100 * Allow to change SimGrid configuration (see --help) within the code
2101 thanks to SD_config() as it can be done in MSG.
2102 * Add a new function SD_task_set_amount() upon user request.
2105 * Handle units for values (10ms, 10kiloflops, 10Bps, 1GB, ...)
2106 * Remove rule based routing (no more PCRE dependency)
2107 * Add a limiter_link option to cluster tag, to specify a maximum reachable
2108 bandwidth in fullduplex mode when it is less than twice the nominal bandwidth.
2109 * Add a loopback_bw and loopback_lat options to cluster tag.
2110 * Fix the peer tag that could not be mixed with other AS within a Vivaldi
2111 routing. Now peers are encapsulated in an AS and have their own private
2112 router but this is transparent.
2115 * Our own implementation of getline is renamed xbt_getline, and gets
2116 used even if the OS provide a getline(). This should reduce the
2117 configuration complexity by using the same code on all platforms.
2118 * New type: xbt_cfg_elm_boolean.
2119 * Allow to use yes/no for boolean configuration options in the command line.
2120 * Allow to disable SimGrid cleanups at exit from command line option.
2121 There are situations where one may want a simulation to end with an exit.
2122 Unfortunately, calling exit may cause SimGrid to segfault, which is quite
2123 annoying when scripting around the simulator. Adding a
2124 --cfg=clean_atexit:no allows to circumvent this issue.
2127 * Lots of memory leaks were corrected in this release.
2128 There is no known memory leaks anymore, in all of our 600+ tests.
2129 * New command line option --version, to get SimGrid version information.
2130 Packagers may want to add extra words to SIMGRID_VERSION_EXTRA defined in
2132 * Supernovae builds are deprecated, and expected to be removed in the next
2135 -- Sun Nov 17 00:26:44 CET 2013 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2137 SimGrid (3.9) stable; urgency=low
2139 The Grasgory release: GRAS is really dead now.
2141 * Complete overhaul of the internal host structures scheme.
2144 * If you use GRAS, you should stay at SimGrid 3.5 (at most) since it
2145 was considered as experimental and badly maintained since then.
2146 * Keeping it was thus a trap to our potential users, that could take
2147 it instead of MSG or SMPI by mistake despite is pity state.
2148 * GRAS seems to have very few users (if any), and no one volunteered
2149 to maintain it further. It also induces a lot of XBT code (for
2150 portability sake), that must be maintained too.
2151 * For all these reasons, we killed GRAS. If someone wants to revive it
2152 in the future, don't cry, our git history still remembers of GRAS.
2155 * Major overhaul. Merge our documentation again as time proved that
2156 splitting it was really not helping our users.
2157 * Further improve the developer documentation to help newcomers
2158 hacking on SimGrid itself. The user documentation (and in
2159 particular, the beginner documentation) is still in a sorry state.
2162 * Now works on Windows too!
2163 * Much more extensive test suite, from MPICH
2166 * Add a new loader (SD_PTG_dotload) that creates a parallel task graph
2167 (i.e., a DAG whose nodes are parallel tasks) from a dot file. Creates a
2168 dynar of SD_TASK_COMP_PAR_AMDAHL and SD_TASK_COMM_MXN_1D_BLOCK tasks.
2169 * Bug fix: let task be scheduled when the last dependency to be solved is
2170 a control dependency.
2171 * Remove SD_load_environment_script function.
2172 Use the C sg_platf function if you want to declare a platform
2176 * New function: MSG_process_get_number()
2177 * Old function documented: MSG_config()
2178 * Remove MSG_load_platform_script function
2179 Use the C sg_platf function if you want to declare a platform
2183 * Change the default value of the TCP_gamma constant (maximal size of TCP
2184 congestion window) to a more realistic 4MiB value. If you notice changes in
2185 your simulation results, you can fall back to the previous 20k tiny window
2186 by adding --cfg=network/TCP_gamma:20000 on command line.
2187 * (Hopefully) fix a bug wrt periodic availability and state traces
2188 * Bug fix: use default values at start when first event in availability/state
2189 trace is not at time 0.
2192 * remove the "new_" part of function name sg_platf_new_trace_connect
2193 (resulting in sg_platf_trace_connect), since it does not create
2197 * Kill synchronized dynars, and xbt_dynar_dopar(). We cannot think of a
2198 use case where it's really mandatory, and maintaining it was a pain in
2200 * New: xbt_fifo_search(), search an item with a user-provided
2201 comparison function instead of dumb pointer comparison.
2204 * Fix the lua deployment:
2205 Use `simgrid.init_application()` before deployment instead of
2206 `simgrid.msg_register_application()` after.
2209 * Transfer the tracing files into the corresponding modules.
2211 -- Tue Feb 5 11:31:43 CET 2013 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2213 SimGrid (3.8.1) stable; urgency=low
2215 The "we are told that some people want to also *install* the simgrid
2218 * Add missing file "tesh.1" to the archive.
2220 -- Sat Oct 27 16:12:11 CEST 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2222 SimGrid (3.8) stable; urgency=low
2224 The Psssshiiiit release: SimGrid jumps into the Cloud.
2227 * Add an experimental interface to manipulate VMs. They are mainly
2228 process groups with very few intrinsic semantic, but they should
2229 allow you to build the semantic you want easily.
2230 * New function: MSG_host_set_property_value()
2231 * New function: MSG_process_on_exit(). To clean memory in all cases.
2232 * Bug fixes that made the host (and link) failures unusable.
2233 * Add a way to auto-restart process when the host in which they are
2234 executing comes back (ON_FAILURE="RESTART" on deployment file,
2235 MSG_process_auto_restart_set).
2236 * Use the "msg_" prefix for all datatypes (instead of m_, msg_ and MSG_),
2237 please stop using the old ones, they are DEPRECATED.
2239 * Deprecate functions MSG_global_init() / MSG_global_init_args()
2240 Please use MSG_init() instead. (reducing the amount of entry
2241 points in the library helps us).
2242 * Make it impossible to link against the wrong version of the lib
2243 * Deprecate MSG_clean(). No need to call it anymore.
2244 * Function MSG_get_host_number() is not deprecated anymore.
2247 * Split the doc into a user guide and a reference guide.
2248 * Start a developper guide to help people hacking on SimGrid.
2251 * Enable tracing by default. This modules rocks you should use it.
2252 * Remove option custom_flags. Now use environment variables CFLAGS
2254 * Use default cmake things to detect lua instead of home grown ones.
2255 * New option "enable_mallocators" to disable mallocators, for debugging
2256 purpose ("on" by default).
2259 * Bug fixes around the resource failures: don't let the processes
2260 survive the host they are running onto.
2261 * Add an interface to auto-restart processes when the host in which they are
2262 executing comes back.
2263 * Ensures that SIMIX_clean is called automatically. It's not part of
2264 the public interface anymore (bindings should be updated).
2267 * Bug fix for when SD_Simulate is called with a positive value: be careful
2268 when comparing doubles. Sometimes they are different for non significant
2270 * New types of typed tasks. SD_TASK_COMP_PAR_AMDAHL represents a
2271 parallel task whose initial work is distributed among host according
2272 to the Amdahl's law. Such tasks are created with a parameter alpha
2273 that corresponds to the non-parallelizable part of the computation.
2274 SD_TASK_COMM_PAR_MXN_1D_BLOCK represents a complex data redistribution
2275 between two sets of workstations assuming a 1D block distribution (each
2276 workstation owns a similar share of data) on both sides.
2278 These tasks can be scheduled with SD_task_schedulel or SD_task_schedulev.
2279 Data redistribution will be automatically scheduled once parent and child
2280 are both scheduled. The filling of computation_amount and
2281 communication_amount structures is now done seamlessly thanks to the chosen
2283 * New function SD_workstation_dump to display various information
2284 * New function SD_task_set_rate to throttle the bandwidth allowed to be used
2285 by a SD_TASK_COMM_E2E typed task. This rate depends on both the nominal
2286 bandwidth on the route onto which the task is scheduled and the amount of
2288 To divide the nominal bandwidth by 2, the rate then has to be:
2289 rate = bandwidth/(2*amount)
2290 * Compute tasks that have failed can now be rescheduled and executed again
2291 (from their beginning)
2292 * Increasing source code coverage (src/simdag is now covered at 95.8%
2296 * Re-implement time-independent trace replay using SMPI (at the
2297 smpi_smp_* level) instead of MSG. This should replace
2298 examples/msg/actions/actions.c
2299 * Implement support of MPI Datatypes (vectors, hvectors, indexed,
2300 hindexed and structs)
2301 * Implement the exchange of non-contiguous data.
2302 [Khalid Hasanov & Jean-Noel Quintin] Thanks for the patch, guys.
2303 * Correct behavior of smpi/sender_gap and set its default value to 0
2304 * Add option to asynchronously send small messages to allow better
2305 simulation of pt2pt communications. --cfg=smpi/async_small_threshold:value
2306 specifies the size in bytes under which messages will be asynchronously sent.
2307 * Add support of MPI_Iprobe, MPI_Probe, MPI_Testall, MPI_Wtick functions
2308 * SMPI now handles more MPI specific values in input. Closes [#14389] and [#14388]
2311 * New C interface to define a platform: XML is now optional.
2312 For more info, please check include/simgrid/platf.h.
2313 * New interface to define random platforms from the C:
2314 For more info, please check include/simgrid/platf_generator.h and
2315 examples/msg/masterslave/masterslave_platfgen.c
2316 * Export a sg_cmdline dynar containing all the arguments we got from
2320 * Two new tracing options for adding comments to trace file so you
2321 can track your experiments (see --help-tracing for details).
2322 * New option to generate an impoverished trace file (--cfg=tracing/basic:1)
2323 * Adding the SimGrid version that generated the trace file as a comment.
2324 * Instrumenting other MSG functions (MSG_task_isend_with_matching and MSG_task_dsend)
2325 * Fix to avoid key clashes on Paje links
2326 * Other minor fixes related to the Paje specification
2329 * Functions xbt_dict_hash() and xbt_dict_hash_ext() are made public,
2330 and renamed to xbt_str_hash() and xbt_str_hash_ext().
2331 * New function: xbt_os_timer_resume() to restart a timer w/o resetting it.
2332 * Greatly improve the robustness of mmalloc to user errors (such as
2333 using an area after freeing it, or freeing it twice)
2335 -- Thu Oct 25 17:30:06 CEST 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2337 SimGrid-java (3.8.1) stable; urgency=low
2339 * New module: org.simgrid.trace.Trace (SimGrid trace bindings)
2340 Warning: all methods are visible, but only some of them are
2341 implemented so far. Check the source (src/jtrace.c)
2342 for further information.
2343 * New module: org.simgrid.msg.File (SimGrid File management functions)
2344 * New Module: org.simgrid.msg.VM (SimGrid interface to mimick IAAS clouds)
2345 * Change the meaning of Process.restart: now restart the process from
2346 the beginning, like MSG_process_restart in C.
2347 * Add Process.setAutoRestart: handling of process restart when failed
2349 * Add Process.getProperty, Host.getProperty, Host.getProperty: allows
2350 you to retrieve the properties of the processes/hosts
2351 * Deprecate Msg.clean(): you can just forget about it now.
2352 * New function Process.getCount(), that only works when compiling
2353 with the not yet released version 3.9 of the C library.
2355 * New context factory based on Coroutines. It mandates a modified JVM
2356 but then, the simulations run about five times faster, and there is
2357 no limit to the amount of processes (beside of the available memory).
2359 -- 2012-12-04 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2361 SimGrid (3.7.1) stable; urgency=low
2364 * Restore the prototype of MSG_process_create_with_environment() to
2365 the pre-3.7 situation by removing the kill_time argument.
2366 * Add a MSG_process_set_kill_time() function instead.
2369 * Fix weird behaviors when dealing with parallel tasks.
2372 * Simgrid is now built as a dll.
2373 * Simgrid-java now works on Windows.
2374 * Simgrid-Java is now included into Windows package.
2377 * First pre-build package for MacOSX.
2380 * Fix compilation when using MSG_USE_DEPRECATED.
2381 * Fix some compilation issues on Macs and Windows.
2382 * Reduce the number of failing tests on exotic systems, like Debian/Hurd.
2383 * Environment variables CFLAGS and LDFLAGS are now honored by cmake.
2385 We discovered that the Lua console is broken, but we are missing the
2386 manpower to fix it right now. The problem existed in 3.7 too, so we
2387 are not blocking the release for that. Sorry if you depended on this
2388 feature, any help would be really welcome.
2390 -- Thu Jun 7 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2393 SimGrid-java (3.7.1) stable; urgency=low
2395 The "Java aint got to be bloated and slow" release
2398 * Various internal cleanups and performance improvement
2399 Simulations are expected to run up to twice faster or so
2400 * Make Process.kill(process) an instance method, not a static one
2401 * User processes are not java.lang.Thread subclasses.
2402 This breaks the compatibility (sorry), but previous API was
2403 brain-dead, making it impossible to have non-trivial
2404 initializations in the process constructor.
2405 * Require a full constructor per Process sub-class.
2406 Kinda breaks the compatibility (sorry), but this allows a much more
2407 efficient way to launch the processes at simulation startup.
2408 * Do not embeed our version of semaphores, java 1.5 can be considered
2409 as sufficiently prevalent for us to not dupplicate its features.
2413 * Add examples for almost every part of the API
2414 We spotted and fixed a lot of bugs in the process
2416 * New module: asynchronous communication API
2417 * New function: Process.sleep()
2418 It takes milliseconds as argument, just as java.lang.Thread.sleep()
2419 * New module: org.simgrid.msg.Mutex (SimGrid mutexes)
2420 * New module: org.simgrid.msg.RngStream (RngStreams random generators)
2422 -- 2012-06-12 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2424 SimGrid (3.7) stable; urgency=low
2426 The "spring cleanups (before the next Big Project kicks in)" release.
2429 * We can specify the SMPI latency/bandwidth factor with command line
2430 add --cfg=smpi/bw_factor:"threshold0:value0;...;thresholdN:valueN"
2431 or add --cfg=smpi/lat_factor:"threshold0:value0;...;thresholdN:valueN"
2432 You can also use the "config tag" from platform file by adding this line
2433 <prop id="smpi/bw_factor" value="threshold0:value0;...;thresholdN:valueN"></prop>
2434 (see "example/platforms/tag_config.xml" to use "config tag").
2435 Note that the command line supersedes the platform file configuration.
2436 * Change the correction factors used in LMM model, according to
2437 the latest experiments described in INRIA RR-7821.
2438 Accuracy should be improved this way.
2439 * Use the partial invalidation optimization by default for the
2440 network too. Should produce the exact same results, only faster.
2441 * Major cleanup in surf to merge models and split some optimization
2442 mechanisms from the core of the models. As a result you can now
2443 specify which model to use (e.g., --cfg=network/model:LV08
2444 --cfg=cpu/model:Cas01) and which optimization mode to use
2445 (e.g., --cfg=network/optim:lazy --cfg=cpu/optim:TI).
2446 Incompatible combinations should err at initialization. See
2447 --help-models for the list of all models and optimization modes.
2448 * The CLM03 workstation model was dropped for simplicity because it
2449 used the deprecated CM02 network model. Use default instead.
2450 * Rename the TCP_gamma configuration option to network/TCP_gamma
2451 * Rename the coordinates configuration option to
2452 network/coordinates, and document it
2453 * Use now crosstraffic keyword instead of the terribly misleading
2454 fullduplex keyword. It is activated by default now in the current
2455 default model, use --cfg=network/crosstraffic:0 to turn it off.
2456 * Ongoing refactoring the model parsing to make XML files optional
2457 See include/simgrid/platf.h for details (still to be completed)
2460 * Major overhaul of the documentation. Almost instructive now :/
2461 * Deprecate the use of m_channel_t mechanism like MSG_task_{get,put}
2462 functions and friends. This interface was considered as
2463 deprecated since over 2 years, it's time to inform our users that it is.
2464 Switch to MSG_task_{send,recv} instead, or compile SimGrid command line
2465 'cmake -Dcustom_flags="-DMSG_USE_DEPRECATED" .' if you really need to
2466 use these (crappy) functions in your code.
2467 These functions will be removed soon. Stop using them now.
2468 * Deprecate MSG_get_host_{table,number}
2469 Implement MSG_hosts_as_dynar() instead.
2470 * Implement MSG_processes_as_dynar() (Closes gforge #13642)
2471 * Remove the public field msg_host_t->name. Use MSG_host_get_name()
2474 * Stabilize the parallel execution mode of user contexts
2475 * Introduce configuration variables to control parallel execution:
2476 - contexts/synchro: Synchronization mode to use when running
2477 contexts in parallel (either futex, posix or busy_wait)
2478 - contexts/parallel_threshold: Minimal number of user contexts
2479 that must be part of a scheduling round to switch to parallel
2480 execution mode (raw contexts only)
2481 * Fix bugs that prevented to use suspend/resume along with
2482 synchronization structures.
2483 * Fix bugs in process termination that lead to invalid memory access
2484 in very specific conditions.
2487 * Introduce a parallel mode for the models (controlled by surf/nthreads
2488 configuration item). In our tests, running the models in parallel
2489 never lead to any speedups because they are so fast that the gain
2490 of computing each model in parallel does not amortizes the
2491 synchronization costs, even when ultra fast futexes are used.
2492 This is released anyway because YMMV.
2495 * Performance boost by using a swag internally to compute the set of
2496 tasks that are finished and should constitute the return value of
2500 * Enable it by default now that it is considered rather stable.
2503 * Documentation of the tracing functions.
2504 * Performance gains when tracing categorized/uncategorized resource
2505 utilization by avoiding calls to get route when updating resource
2506 variables. LMM constraints are being used instead.
2507 * API changed to set task categories. Use MSG_task_set_category instead
2508 of TRACE_msg_set_task_category, and SD_task_set_category instead
2509 of TRACE_sd_set_task_category. They only work if ENABLE_TRACING is ON.
2510 * Bugfix for graphicator, routes not correctly obtained, memory leaks
2511 * Examples for link user variables added (see at examples/msg/tracing/)
2512 * Deprecated function TRACE_msg_set_process_category completely removed
2513 * Trace header updated according to the latest Paje file format
2514 * Tracing network lazy updates, no longer obligate users to use full updates
2515 * --cfg=tracing/platform:1 also registers power/bandwidth variables
2516 * Experimental: let user code declare/set/push/pop application states for hosts
2517 * API changed to allow the manual creation of graph configuration files
2518 for Triva. See TRACE_get_node_types() and TRACE_get_edge_types().
2521 * Improve the API of Lua MSG bindings, using the Lua spirit.
2522 * Each simulated process now lives in its own Lua world (globals are
2523 automatically duplicated). It helps writing simulators. Will allow
2524 to run Splay programs within SimGrid in the future.
2525 * Add a Chord example in Lua, equivalent to the MSG one.
2528 * Start the implementation of a solution to express temporal
2529 properties, not only local assertions. This is still an
2530 experimental work in progress, stay clear from it to be safe.
2534 - Add new runtime parameters --help-logs and --help-log-categories
2535 to display information about supported logging parameters and
2537 - Old deprecated parameters --{gras,surf,msg,simix,xbt}-log=...
2538 don't exists anymore.
2539 * Mallocators: allow value NULL for the reset function.
2541 - New function xbt_dict_new_homogeneous(void(*)(void*)) to
2542 create homogeneous dictionaries, where all the elements share the
2543 same free function. Non homogeneous dictionaries will be
2544 deprecated in the next release.
2545 - Dicts of scalar elements (xbt_dicti_*) are deprecated.
2546 - Multi-level dictionaries are deprecated.
2548 - new function xbt_dynar_search_or_negative() that is useful when
2549 you have less than 2 million elements in your dynar and don't
2550 want of the extra complexity of catching exceptions when the
2551 element is not found.
2553 - Make xbt_os_thread module (for thread portability) public.
2554 Documentation is still to come, sorry.
2556 - Cleanups and simplifications to make it maintainable again.
2557 - Exotic features (such as memalign and valloc) were removed.
2558 - The metadata were extended and improved so that the
2559 model-checker becomes able to explore and inspect the heaps.
2560 - This may induce a performance drop when enable_model-checking is
2561 ON in cmake (even if it's not used in the simulation), but it is
2562 necessary at this point to get MC working.
2564 Turn model-checking OFF if simulation performance matters to you.
2565 Not enabling it at runtime is not enough, disable it in cmake.
2567 -- Tue May 15 11:30:19 UTC 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2570 SimGrid (3.6.2) stable; urgency=low
2572 The "Not coding new stuff allows to polish old things" release.
2575 * New bindings to the NS3 packet level simulator (experimental)
2576 * Use the raw (efficient) execution contexts instead of the sysv
2577 (portable) ones when possible.
2578 * libpcre is now mandatory in any cases since not using it led to
2579 severe performance loss and possibly other issues
2580 * Update the XML platforms:
2581 - G5K: include the latest machine in Nancy
2582 - GridPP and LCG: new platforms
2583 * Documentation was partially updated, at least (more to come)
2585 Bug fixes, cosmetics and small improvements
2586 * Free terminated processes before the end of the simulation to avoid
2587 exhausting the memory of users having very dynamic amount of
2589 * Bug fix and cosmetics about canceling non-running tasks
2590 * Bug fix about the dot loader's issues when using libcgraph
2593 * Create an installer for windows with nsis (amd64 and win32)
2594 - Add an hello world project to illustrate simgrid project creation.
2595 - Embed libpcre into the Simgrid installer to avoid
2596 its compilation burden
2597 * The raw execution contexts should work on Apple now
2598 * Port to Windows 64 bits
2599 - Sysv contexts now have an implementation for this arch
2600 - GRAS communication features now support this arch
2601 * Drop support for borland compiler on windows
2602 - this code was not maintained, and we kinda depend on gcc nowadays
2603 * Fix portability issues on kfreebsd/gnu: build error about semaphores
2604 * Fix portability issue on unstable ubuntu: linker became picky on
2607 -- Wed Oct 5 15:51:01 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2609 SimGrid (3.6.1) stable; urgency=low
2611 The "Oops, we broke Macs too" release
2614 * Fixed contexts detection so that raw ones are used when possible
2615 * On Mac, do not use Posix Ucontexts with gcc v4.[1-5] since this
2616 leads to a strange error, with user code segfaulting sometimes when
2617 the generated code is not perfectly aligned (which is not
2618 controllable from the user side, depends on the amount of code)
2621 * New macro: CATCH_ANONYMOUS, which is like CATCH(e) but without argument.
2623 -- Mon Jun 27 13:59:03 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2625 SimGrid-java (3.6) unstable; urgency=low
2628 * Split of every thing from simgrid v3.5 into a separate package.
2630 -- 2011-10-05 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2632 SimGrid (3.6) stable; urgency=medium
2634 The Summer Release, also known as the "OMG! They Killed Kenny!" version
2637 * Bindings now constitute their own package, separated from the main one.
2638 Rationale: reduce our maintenance nightmare by reducing the module coupling
2639 They will soon be released on their own on gforge.
2641 svn co svn://scm.gforge.inria.fr/svn/simgrid/contrib/trunk/simgrid-java
2642 svn co svn://scm.gforge.inria.fr/svn/simgrid/contrib/trunk/simgrid-ruby
2644 GRAS: It is not considered as stable anymore, but experimental. Sorry.
2645 * It's not quite deprecated for now because we have no replacement,
2646 but it may soon become the case.
2649 * New MPI functions supported: MPI_Comm_disconnect, MPI_Comm_get_name
2650 * Fortran: New user-level cache variable to store the rank of the running
2651 process. This improves performance by an order of magnitude.
2652 * C: New coccinelle script to automatically locate and modify global and
2653 local static variables.
2654 * Improved SMPI network model with a sender-side gap to account for multiple
2658 * New function MSG_comm_get_status(). MSG_comm_test() and MSG_comm_testany()
2659 only say if a communication is finished, no matter whether it succeeded or
2660 failed. You can call MSG_comm_get_status() to know the status of a finished
2662 * New function MSG_task_dsend() to send a task and detach it. When a
2663 communication is detached, you are never notified of its success or failure
2664 and the memory is released automatically once it is finished. This function
2665 is useful when you don't care about the end nor the success of a
2667 * Change the prototypes of action replay. Sorry for inconvenience,
2668 but this is really more efficient this way (and to adapt your code,
2669 you just have to fix the initialization, that shouldn't be too long)
2670 * Kill the braindead MSG_task_refcount_dec() function. I guess nobody
2671 ever managed to do anything useful with it.
2672 * New function MSG_comm_testany(). Similarly to MSG_comm_waitany(), it
2673 takes a dynar of communications. It returns immediately and gives the
2674 index of a finished communication (if any).
2675 * New example: a basic implementation of the Chord P2P algorithm.
2678 * New model for multi-core CPUs. You can now use the core attribute to
2679 precise the number of cores of a host. This is a basic model. Every
2680 process running on the host receives at most the power provided in
2681 the DTD (throughput<=power). Total throughput of process cannot exceed
2683 * New peer tag. This peer tag creates a tiny AS comprising a host and a
2684 router linked by an up-link and a down-link (possibly asymmetrical).
2685 This kind of pattern allows to easily build last-mile model style platforms.
2686 Aggregating such patterns in a rule-based AS is thus the technique of
2687 choice for modeling large peer-to-peer/volunteer computing/cloud platforms.
2688 * New model for Vivaldi routing. We transformed the Vivaldi network model
2689 into a Vivaldi routing model (based on the rule-based model). This allows to
2690 combine Vivaldi based latencies with last-mile platforms.
2693 * Added a check for NaN of IEEE754 infinite in the double entries of
2695 * Introduce a new context factory "raw", highly inspirated from the
2696 ucontext factory, but using manually crafted functions in assembly to
2697 do the work in an efficient manner.
2698 * Allow to change the used context factory at run time, not only at
2699 compilation time. Use --cfg=contexts/factory:raw for maximal speed.
2700 * Add an option --cfg=contexts/stacksize:N to set the stack size of the user
2701 contexts at runtime (only with raw contexts or ucontexts).
2702 * Completely rewrote this module to allow parallel execution of user
2703 processes. Use --cfg=contexts/nthreads:N to execute user processes
2704 with N parallel threads (the default is 1, meaning no parallelism).
2705 * Allow to decide dynamically between sequential and parallel modes.
2706 When nthreads > 1, you can use --cfg=contexts/threshold:P to run the user
2707 processes in parallel only when their number is greater than or equal to P
2709 * Added a check for NaN of IEEE754 infinite in the double entries of
2713 * New command line option: if you pass --cfg=verbose-exit:0, SimGrid
2714 won't output the state of processes when interrupted with Ctrl-C
2715 * Add a new function xbt_dynar_to_array that transforms a dynar into a
2716 NULL-terminated array. This may solve backward compatibility issues
2717 due to the change to return type of SD_simulate. See also:
2718 http://lists.gforge.inria.fr/pipermail/simgrid-user/2010-December/002206.html
2719 * Add new macros with variable number of arguments.
2720 - in xbt/log.h: XBT_DEBUG, XBT_VERB, XBT_INFO, etc.
2721 - in xbt/asserts.h: xbt_assert
2722 - in xbt/cunit.h: xbt_test_{add,fail,assert,log}
2723 - in xbt/ex.h: THROWF and RETHROWF.
2724 Define XBT_USE_DEPRECATED if you want to use the old numbered macros like
2726 * Change xbt_die() to accept a format string with arguments, just like printf.
2727 * New data structure: xbt_lib_t, like a dict but more general and with better
2731 * New configuration options
2732 Options triva/categorized and triva/uncategorized can be used to generate
2733 graph configuration files for Triva visualization tool.
2734 * Configuration option tracing/platform is renamed to tracing/categorized
2735 * XBT logging makes tracing error checks easier, new root log hierarchy: instr
2736 * New TRACE_user_link_variable interface:
2737 User provides the name of the link and the tracing variable to attach to it
2738 * the declaration of tracing categories must be done after the environment
2740 * simpler tracing interface, just one way to declare categories
2741 TRACE_category or TRACE_category_with_color, it is up to you
2742 * links in the trace file are again identified by their names
2743 * trace contains the full platform hierarchy exactly as declared using the ASes
2744 * Options tracing/msg/[task|process]:1 groups the process by hosts
2745 for both cases, tasks and processes must have names that are unique during the simulation
2746 these options generate traces that are suited to gantt-charts, such as the space-time view of Paje
2747 * The experimental option tracing/msg/volume is deprecated
2748 its functionality may be reincorporated if needed
2750 The tracing generates a trace file with unordered timestamped events,
2751 because of the way the core simulator (surf) works. A script available
2752 at the tools directory (fix-paje-trace.sh) can be used to put the events
2753 in order. We have changed the tracing so it can generate ordered timestamped
2754 events in the final trace, but depending on the simulator (and how much time
2755 is simulated) that can lead to a huge memory utilization. It is deactivated
2756 by default, but it can be activated using the --cfg=tracing/buffer:1 switch.
2758 Build Infrastructure
2759 * Define a SIMGRID_VERSION macro in simgrid_config.h.
2760 - We are trying hard to keep the API stable, but it may happen that
2761 some things change (we're a research project after all, not a
2762 nuclear plant operating system). If such things should happen, you
2763 could rely on that macro to adapt.
2764 - current value: 30600 for 3.06.00, aka 3.6
2765 * Define macro MAKE_SIMGRID_VERSION(major, minor, patch) to help building
2766 a number that can be compared with SIMGRID_VERSION.
2767 * Add a build option -Denable_debug (set to ON by default): when set to OFF,
2768 assertions and verbose/debug logging events are disabled at compile time.
2770 -- Tue Jun 21 08:57:43 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2772 SimGrid (3.5) stable; urgency=medium
2775 * New feature to any SimGrid-based simulator: Model-Checking
2776 Check SIN#1 for more details.
2779 * New Model SMPI (three-interval linear regression for correction factors)
2780 See RR-7426, available at http://hal.inria.fr/inria-00527150
2781 * Ability to use FORTRAN MPI code (through f2c, automatically privatized)
2782 * New MPI functions supported: MPI_Get_count(), MPI_Comm_split()
2783 * New: RAM folding (see RR-7426 and examples/smpi/NAS/DT-folding)
2784 * New: execution sampling (see RR-7426 and examples/smpi/NAS/EP-sampling)
2785 * See also src/smpi/README
2790 - Tracing API changes: TRACE_start and TRACE_end should not be called
2791 by user-code. They are automatically called by simulators created
2792 with SimDAG, MSG and SMPI if the toolkit is compiled with
2793 tracing_enabled=ON. Categories declaration and utilization remain the
2794 same for MSG and SimDag.
2795 - A function was added to the tracing API to declare categories with
2797 - TRACE_category_with_color (char *category, char *color)
2798 where color must be in the following format
2799 "%f %f %f", red, green, blue
2800 and red, green, blue are float values in the interval [0, 1]
2801 - User can specify NULL as color parameter, or continue calling
2802 TRACE_category (cat)
2803 On that case, the tracing system will define random colors
2804 - The following command-line options are supported:
2805 --cfg=tracing/filename:msg.trace
2806 --cfg=tracing:1 (activate tracing, needed to use others)
2807 --cfg=tracing/platform:1 (categorized resource use)
2808 --cfg=tracing/uncategorized:1 (uncategorized resource use)
2809 --cfg=tracing/msg/task:1 (task creation)
2810 --cfg=tracing/msg/process:1 (process creation, migration)
2811 --cfg=tracing/msg/volume:1 (volume of MSG send/recv)
2812 --cfg=tracing/smpi:1 (SMPI interface tracing)
2813 --cfg=tracing/simdag:1 (allow SimDAG tasks receive categories)
2814 - examples of examples/msg/tracing updated
2816 - DAXLoader and DOTLoader functions can generate tasks with categories
2817 - A new function to attribute a category to SD tasks:
2818 TRACE_sd_set_task_category (SD_task_t task, char *category)
2819 * Tracing the MPI interface implemented by SMPI
2820 - Collective operations are traced with states
2821 - Point-to-Point operations are traced with states/links
2822 - Tracing activated by a parameter "-trace filename" passed
2823 to smpirun during execution (considering that simgrid
2824 is compiled with tracing enabled)
2825 - To run the simulation with gdb, the simulator
2826 accepts --cfg=tracing/smpi:1 to trace SMPI
2827 - tesh files to check if smpi tracing is ok
2828 - See examples/smpi/NAS/DT-trace
2829 * GTNetS tracing re-worked
2830 - adaptation to the tracing system of GTNets to cope
2831 with modifications regarding the fullduplex mode
2832 - new tesh files to check if gtnets tracing is ok
2835 * Asynchronous communications through the functions:
2836 MSG_task_isend/irecv and MSG_comm_test/wait/waitall
2837 * New function: MSG_load_platform_script()
2838 to make possible using a lua script instead of XML files to set up platforms
2839 * New function: MSG_set_function
2840 to associate functions to processes, used when bypassing the parser
2841 * New functions: MSG_task_set_name(), MSG_task_set_compute_duration()
2843 Platforms: Add some more examples in examples/platforms
2844 * Grid'5000: see www.grid5000.fr
2845 * *_30000_hosts.xml: various huge files [mainly scalability testing]
2848 * Change the XML format. This is a very important modification. SimGrid
2849 3.5 introduces a new hierarchical format based on the notion of
2850 Autonomous Systems. Compatibility with old format is ensured
2851 through the perl script provided in the install bin directory
2852 bin/simgrid_update_xml.
2853 It is now possible to build platforms with specific routing
2854 mechanism (Full/Dijkstra/DijkstraCache/Floyd) and to easily
2855 connect several platforms together. We will try to provide soon
2856 set of realistic platforms exploiting these properties (have a
2857 look at examples/platforms/ for the moment).
2858 * Take the opportunity of the XML format change to be a good XML citizen:
2859 rename link:ctn to link_ctn and similar changes (also dealt with by
2861 * Add a new routing scheme (rule-based) using regular expressions. It
2862 enables to have an extremely low memory footprint when the
2863 underlying routing is simple and can be compactly described. You
2864 need to have libpcre4-dev (perl regular expressions) installed if
2865 you want to use this routing scheme.
2866 * Revive the cluster TAG and allow to easily and efficiently (both in
2867 term of memory and speed) connect clusters together. Have a look
2868 at teshsuite/simdag/platforms/ to see how this can be done. With
2869 this tag, you can create clusters with thousands of tasks at no
2870 cost (have a look at examples/platforms/).
2871 Note: clusters are implemented as ASes, so there is no need for an
2872 enclosing AS tag if you have only one cluster in your platform.
2873 * Add new generic functions in the public interface that allows the user
2874 to call SURF 'create_resource' methods from your code (same
2875 functionality as the XML bypass mechanism but with a much lighter
2877 * Add a new model (enabled through command line --cfg=network/model:SMPI)
2878 that uses a piecewise linear approximation to produce better
2879 results when exchanging small messages.
2880 * Add a new parameter to handle correctly full duplex link and account
2881 for interferences between uplink and downlink communications
2882 (activate with --cfg=fullduplex:1).
2885 * Rename the SD_READY (all dependencies are satisfied and task is
2886 scheduled) state in SD_RUNNABLE and define a new SD_SCHEDULABLE (all
2887 dependencies are satisfied) state.
2888 This prevents a confusion between the notion of "ready to schedule"
2889 (SD_SCHEDULABLE) used in DAG scheduling and that of "ready to be
2890 simulated" (SD_RUNNABLE) used by the simulation kernel.
2891 * Change the way a task is considered as ready. Instead of removing
2892 dependencies when a task is done, a counter is decreased. This way,
2893 it is always possible to reach ancestors thanks to the
2894 SD_taks_get_parents function (even after the end of the simulation.)
2895 * Change the return type of SD_Simulate from (SD_task_t*) into
2896 xbt_dynar_t. This function was in handling a dynar internally and
2897 converted it into a NULL terminated array for historical reasons.
2898 * New function SD_dotload(char*) to load a DAG described in dot
2899 format. This loader and the corresponding examples require the
2900 installation of the graphviz library.
2901 * Fix a bug in the management of tasks of size 0 in the surf network
2902 models. This problem was only visible with SIMDAG and you should
2903 thus disregard results produced with earlier versions if you
2904 relied on this feature (some tasks were blocked because of this).
2905 * Fix a bunch of stuff that prevented to use classical models with SIMDAG
2906 even though your applications were doing only point-to-point
2907 communications and sequential computations. Now you can really use any
2908 model you want (of course, if you create real parallel tasks, which are
2909 not implemented in most models beside ptaskL07, this will abort).
2910 * Add an example that schedules a DAX on an heterogeneous platform
2911 using a Min-Min strategy.
2912 * New function SD_workstation_get_current_task() that returns the kind
2913 of task currently running on a workstation in the sequential access
2915 * Raise some warnings when unexecuted tasks remains at the end of the
2916 simulation. This is usually caused by cycles in the DAG.
2919 * New function: SIMIX_process_set_function() called by MSG_set_function
2920 * Change the underlying waiting queue in semaphores so that a process
2921 can wait on several of them simultaneously (as in waitany).
2922 * Fix the way to handle tokens in semaphores so that all access patterns
2923 work: {acquire, acquire_timeout, waitany} / {release, release_forever}.
2924 * kill the dirty pimple SIMIX_message_sizes_output()
2925 Please use (proper) visualization instead
2928 * New data container: setset (set of sets of elements)
2929 * New module: mmalloc (mapped malloc, allowing to have several
2930 independent segments of malloc)
2931 * New function: xbt_dict_cursor_set_data()
2932 * New functions: xbt_dynar_sort(), xbt_dynar_compare()
2933 * New function: xbt_dynar_is_empty()
2934 * New function: xbt_fifo_get_last_item()
2935 * Fix xbt_dynar_shrink(): use the right element size.
2936 * Fix xbt_dynar_set*(): allow index larger than current size and memset 0
2937 uninitialized areas during expand.
2938 * Fix semaphores: previous implementation was severely broken.
2939 * Use library init/fini functions for our initialization.
2940 - you can use logs and other feature as soon as you want in your
2941 code (even before the xbt_init / MSG_init)
2942 - xbt_exit is now a no-op and produce a warning when used.
2945 * Port GRAS to new SIMIX mechanisms. This allows gras users to
2946 benefit from the latest improvement to the simulation kernel.
2947 * Kill measurement sockets for now. If you rely on them, sorry. This
2948 release is not for you. This feature will be reintroduced in the
2949 future, but we cannot delay the release any further.
2950 * New function: gras_msgtype_get_name().
2951 * Implement gras_agent_spawn in RL too (the prototype changed a bit)
2952 * Fix (at last) the pmm example: it should not randomly fail anymore.
2954 Build chain: bug fixes and overall polishing
2955 * Cmake is now stable enough. Hence, we killed the autotools.
2956 * Port to windows ( TM :)
2957 * Fix the 'make install' target.
2958 No need to use 'make install-simgrid' anymore
2959 * Introduce a 'make dist' target compiling a *source* archive
2960 'make package' compiles a binary archive
2961 * Compile java files only on need
2962 * Add --cd and --setenv command line options to tesh
2963 * Out of source builds are not fully supported yet, but we are close
2964 * Enable supernovae and optimization flags by default for our users
2967 * Add layer to set up environment directly from lua, without XML.
2968 * The effect of gras_stub_generator can be achieved through
2969 lua too (check examples/gras/console/ping_generator.lua)
2971 -- Wed, 01 Dec 2010 22:09:23 +0100 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2973 SimGrid (3.4.1) stable; urgency=low
2975 The "Polishing easter eggs is probably a good idea" release.
2976 This is a bug fixes release only.
2980 * Fix a bug preventing the tasks from begin garbage collected.
2983 * Fix a bug occurring when a host involved in a communication fails.
2984 This was not detected properly by the other peer involved in the
2985 communication. Now, it's reported as a network error.
2988 * Warn the user about loop dependencies in data flow of DAX files
2989 * Obey the control-flow dependencies of DAX files
2992 * Add option "enable_smpi" allowing to not compile SMPI.
2993 Probably useful for the (Mac) users experiencing a build error here
2994 * Improve the detection of lua5.1 and ruby1.8
2996 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Tus, 04 May 2010 28 16:11:16 +0100
2998 SimGrid (3.4) stable; urgency=low
3000 The "Easter in Cargese" release. Also known as (major changes):
3002 * the "se habla Java, Ruby 話せます, fala-se Lua (and deaf-friendly)"
3003 ~> bindings were greatly improved
3004 ~> new tracing infrastructure for better visualization introduced
3006 * the "Welcome to configury modernity" release.
3007 ~> we switched from autotools to cmake, and improved our cdash
3010 A more detailled list of changes follow (full detail in svn log).
3012 Java Bindings: Various Cleanups
3013 * (install java-gcj-compat-dev on debian-like to use them)
3014 * Remove put/get: no need to export deprecated interface in Java
3015 Use send/receive instead.
3016 * Cleanup the examples and add a README per directory
3017 * Remove example autoDestination (that's the only way to go now)
3018 * Remove example explicitDestination (was a plain copy of basic)
3019 * Make JniException a runtime exception, so that there is no need to
3020 declare the fact that you may encounter such a beast. I guess that
3021 nobody will ever want to survive such error.
3022 * Create specific errors for each MSG case of failure:
3023 host failure, transfer failure, timeout, task cancelled
3024 * Cleanup the exceptions that may get thrown by each function
3025 * Other internal cleanups in Java bindings. Performance still bad :/
3026 Ruby and Lua Bindings: create them
3027 * (install ruby1.8-dev/liblua5.1-0-dev on debian-like to use them)
3028 * That's new and great, you should try them out.
3029 Same functionalities than Java bindings, only even less polished
3031 * Kill the useless "rate" argument of SD_task_get_execution_time()
3032 Everyone used to provide -1 as a value, it was not used, and the
3033 semantic of a possible use wasn't even clear.
3034 * SD_SCHED_NO_COST: Constant to use as cost in SD_task_schedule()
3035 either as comm costs or compute costs to mean that there is no
3036 such thing for that specific task.
3037 * Add a SD_task_set_name() function
3038 * Fix SD_task_unschedule() on typed tasks
3039 * Fix SD_task_get_execution_time() to return seconds, not flop*sec
3040 * In DAX loader, accept useless 'level' attributes to <job> since
3041 LIGO DAGs have them (seem to be to ease graphical representation).
3043 * Add an example masterslave_mailbox.c using send/receive and not
3044 the deprecated put/get interface.
3045 * Kill the MSG_paje_output() function. It's a noop since 2 years.
3046 * Kill MSG_WARNING and MSG_FATAL return codes: they were not used
3048 * Rename MSG_TIMEOUT_FAILURE into MSG_TIMEOUT for sake of logic
3049 (declare MSG_USE_DEPRECATED to still have the old name)
3050 * Add a MSG_task_set_data() function
3051 * About trace replay (see examples/msg/actions):
3053 - Allow to work with splitted trace files for each process
3054 Give the specific trace file as argument of each process,
3055 and call MSG_action_trace_run(NULL)
3056 You can still have one merged file for all processes.
3057 - Fix implementation of collective operations
3058 * Allow task_execute() on 0-sized tasks (closes #10063)
3060 * This is the first release of SimGrid where SMPI is not considered
3061 beta anymore (even if some corners should still be improved)
3062 * Port over the new SIMIX_network submodule (internal refactoring)
3063 * Basic support to log events as with SMPE (use --cfg=SMPE:1)
3064 * Implement more missing elements of the standard:
3066 - MPI_MAXLOC MPI_MINLOC + all associated datatype MPI_DOUBLE_INT,
3068 - MPI_Address() MPI_Get_count() MPI_Type_free() MPI_Type_extent()
3069 MPI_Scan() MPI_Get_processor_name()
3070 - Added implementation of missing case for Alltoall (warning: it's
3071 *not* the bruck variant from OpenMPI; based on Alltoallv instead)
3072 - SMPI_MPI_Gather() SMPI_MPI_Gatherv() SMPI_MPI_Scatterv()
3073 SMPI_MPI_Reduce_scatter() SMPI_MPI_Allgather()
3074 SMPI_MPI_Allgatherv()
3075 * Bug fixes include:
3076 - MPI_Waitsome() was broken
3077 - Allow relative includes in smpicc
3078 - Command line cfg argument 'reference_speed' was ignored...
3079 - Some functions did not properly lead to auto-benching of user code
3080 - smpicc passes -O2 by default (just like openmpi one)
3082 * add SIMIX_action_suspend() and SIMIX_action_resume() functions
3083 * Bug fixes about timeouts during communications
3084 * add SIMIX_message_sizes_output() as a pimple to write to file the
3085 amount of messages per size. Use gnuplot to get histogram.
3086 Pimple because that's the only user-visible function of simix,
3087 defined directly in xbt.h (irk, sorry)
3089 - Add a SIMIX_sem_get_capacity() function
3090 - Fix interactions with processe resume/suspende
3091 - release_forever() was stupidly broken
3092 - Fix SIMIX_display_process_status() for processes in a semaphore
3093 - Make SIMIX_sem_block_onto() user-visible
3094 * Refactoring context stuff:
3095 - Use pseudo-OOP for better modularity
3096 - reimplement SIMIX_process_kill() without process_schedule() so
3097 that the latter can take as invariant that it is called from
3099 - Merge context_start into context_new for sake of simplicity
3101 * Add a Vivaldi network model, coded live during SUD'10 ;)
3102 * Rename configuration variables to start a hierarchy:
3103 o cpu_model -> cpu/model
3104 o network_model -> network/model
3105 o workstation_model -> workstation/model
3106 * New configuration variables:
3107 o network/bandwidth_factor: correction to bandwidth
3108 o network/latency_factor: correction to latency
3109 o netwotk/weight_S: correction to the weight of competing streams
3110 * Add a long description to the models, that users can see with such
3111 argument on the command line: --cfg=cpu/model:help
3112 * --help-models display the long description of all known models
3114 * config: add the ability to set a default value after registration
3115 Does not override any previously set value (e.g. from cmd line)
3116 * dict: allow to have integer key and data.
3117 When so, you need to use the following functions
3118 void xbt_dicti_set(xbt_dict_t dict, uintptr_t key, uintptr_t data);
3119 uintptr_t xbt_dicti_get(xbt_dict_t dict, uintptr_t key);
3120 void xbt_dicti_remove(xbt_dict_t dict, uintptr_t key);
3121 In contrary to regular dicts, the key is not malloced before copy.
3122 Mixing scalar and regular elements in the same dict is not tested
3124 * Allow to use xbt_dynar_shrink() to expend the dynar instead
3125 Tracing for Visualization:
3126 * SimGrid is now instrumented in order to generate a trace file for
3127 visualization analysis: to use it, need to compile SimGrid with the
3128 "tracing" option enabled, and instrument the program using SimGrid with
3129 TRACE_start, TRACE_category, TRACE_msg_set_task_category and TRACE_end
3130 (among other functions).
3131 * The instrumentation only traces the platform utilization for now
3132 * Documentation to use the tracing functions and how to analyze the
3133 traces with the Triva tool is written.
3134 * More information about: SimGrid FAQ (in the section Tracing Simulations
3137 * We moved to cmake as default build system. Autotools support will
3138 be dropped soon. Check the FAQ for more info about how to use it.
3139 * Greatly improved our cdash/ctest interactions
3140 Check http://cdash.inria.fr/CDash/index.php?project=Simgrid
3141 * Added memory checking tests with valgrind; lot of memleak fixing.
3142 This may be the first release of simgrid with so few memory issues
3143 * Added code coverage tests.
3144 Our coverage is still improvable, but at least we see it on cdash.
3146 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Wed, 28 Apr 2010 28 17:11:16 +0100
3148 SimGrid (3.3.4) stable; urgency=low
3150 The "Desktop Grid needs love too" release (also called Xmas release).
3152 Models improvements:
3153 * Major speedup in the maxmin system solving by using lazy evaluation
3154 Instead of solving completely the maxmin system at each iteration,
3155 only invalidate (and recompute) the modified parts.
3156 This new feature is enabled in default models but you can try to
3157 turn it on with "--cfg:maxmin-selective-update=1" for other models.
3158 * Cas01 IMproved as default CPU model
3159 This CPU model is the same Cas01 model, but it uses the
3160 maxmin-selective-update flag and a heap structure to manage
3161 actions on SURF kernel.
3162 It reduces the complexity to find the next action to finish and,
3163 consequently, it's faster than the old Cas01.
3164 This is the new default CPU model (Cas01).
3165 * Rename the old Cas01 model to Cas01_fullupdate
3166 Keep the old cpu model Cas01 with the new name of Cas01_fullupdate.
3167 Use "--cfg=cpu_model:Cas01_fullupdate" to use the old default CPU model.
3168 * CpuTI (CPU Trace Integration)
3169 A new CPU model whose objective is simulate faster when using
3170 availability trace files.
3171 Instead of using a full featured, over engineered maxmin system for
3172 CPU modeling, this model does the pre-integration of traces files
3173 to calculate the amount of CPU power available, and so, executes
3174 faster than the old CPU models.
3175 Use "--cfg=cpu_model:CpuTI" to change to this CPU model.
3176 * Use LV08 as default network model since it gives better accuracy
3177 for small messages and shouldn't change things for big ones.
3178 Use --cfg=network_model:CM02 to get the previous behavior.
3181 ******************************************
3182 *DO NOT MIX 3.3.4 RESULTS WITH OLDER ONES*
3183 ******************************************
3184 * The new CPU model may changes simulations!
3185 The point is that events occurring at the exact same timestamp
3186 are not scheduled in the same order with the old and new
3187 version. This may be enough to completely change the execution
3188 of simulations in some cases.
3189 * The new network model will change simulations!
3190 This new model is more realistic than the previous one, so you
3191 should consider redoing your old experiments with this model.
3192 Sorry for the inconvenience.
3195 * Introduce the supernovae compilation mode
3196 When compiled that way, the whole SimGrid (or almost) is put in a
3197 single compilation unit and compiled in one shoot.
3198 This is to help gcc which has difficulties to inline stuff from one
3200 The speedup seem to be above 15%, althrough more tests are needed on
3201 amd64 to confirm that gain.
3204 * Port of MSG's mailbox on top of SIMIX network
3205 The put/get mechanism was greatly simplified on the way.
3208 * New SIMIX network module. Provides:
3209 - Mailbox: rendez-vous mechanism to find with who you want to speak
3210 - Synchronous send/recv: easier and hopefully faster since the
3211 logic is handled in the maestro process directly now
3212 - Asynchronous send/recv: you dreamt of it? It's here now
3213 Too bad that nobody cared enough to propagate the change to MSG.
3214 * Add semaphores as SIMIX synchronization mechanism.
3217 * new function SD_daxload(char*) to load a DAX file
3218 (see http://vtcpc.isi.edu/pegasus/index.php/WorkflowGenerator)
3219 * Introduce typed tasks. Specify its kind and cost at creation.
3220 At scheduling, just give where it should be placed, and the cost
3221 for each involved resource is automatically computed.
3222 Existing constructors so far (more to come of course):
3223 - SD_task_create_comm_e2e() for end-to-end communication
3224 - SD_task_create_comp_seq() for sequential computation
3225 Use SD_task_schedulev() / SD_task_schedulel() to schedule them.
3226 * new function SD_task_dump() for debugging display
3227 * new function SD_task_dotty(task,FILE*) writing to file the info
3228 about the task in dotty format
3229 * SD_task_dependency_exists() can now cope with having one of its
3230 arguments NULL. If so, it tests whether the other argument has any
3232 * Add getters on list of preceding/following tasks:
3233 SD_task_get_parents(task) and SD_task_get_children(task)
3234 * Add getters on amount of workstations and list:
3235 SD_task_get_workstation_count(t) and SD_task_get_workstation_list(t)
3236 * Add getter on task kind: SD_task_get_kind(task)
3237 * Update the start_time and finish_time of tasks on completion/failure
3238 * Bugfix: Remove task from state swags when destroyed
3241 * New function: void gras_cpu_burn(double flops) -- a simple CPU burner
3244 * New function: xbt_dynar_dopar(dynar,fun) to map a function over the
3245 dynar with one separate thread per value of the dynar.
3246 * Change the prototype of xbt_thread_create(), sorry.
3247 Added a boolean parameter indicating whether we want to join this
3248 thread (used in SG only for now)
3249 * Implement xbt_thread_join and xbt_thread_yield in SG also.
3252 * GTNetS wrappers should now be usable again (and betterly tested too)
3253 * Fix a major regression from 3.2 where the timeout provided to
3254 MSG_task_put_with_timeout() was used as absolute time before which
3255 the comm should be done.
3256 * Start to fix the <cluster> tag.
3257 - Internal links should be good now (beside of the loopback, which
3258 use the private link instead)
3259 - paths to the external world is still rather broken
3260 - the <route:multi> tag is just broken. Actually that's brain-dead.
3261 We need sth like <route:multi src="myCluster" dst="$*-${myCluster}">
3262 to make it less stupid
3263 ** Check your platform with teshsuite/simdag/platforms/flatifier **
3264 * Fix a source-level compatibility glitch from 3.2: after defining
3265 MSG_USE_DEPRECATED, you can use the old name
3266 MSG_task_put_with_time_out() for MSG_task_put_with_timeout()
3267 * Allow to compile from the SVN with automake 1.11
3268 * Fix some problems when using the "start_time" tag in deployment XMLs.
3269 * Fix #8569: XBT/synchro.h has redundant declarations
3270 * Fix #8563: MSG return values and exceptions
3271 Introduce a MSG_TIMEOUT_FAILURE return code and use it consistently.
3272 * Integrate patch #8636: Obey DESTDIR when installing documentation.
3273 Thanks to Robson Peixoto.
3274 * Fix a vicious bug in dictionaries inducing that some elements were
3275 not freed on xbt_dict_free()
3277 Portability report of this version:
3278 * Main portability targets:
3279 - linux (ubuntu (804/810/910) /debian (4/5/testing) /fedora (core11))
3280 on (amd64/i386/ia64)
3281 - mac leopard on i386
3282 Known problems: http://cdash.inria.fr/CDash/index.php?project=Simgrid
3283 but nothing critical.
3284 * Other platforms: windows, AIX and others were not tested for this release
3286 Timing report of this version:
3287 * Lazy evaluation brings arbitrary speedup (ie, speedup depending on
3288 scenario parameters). From 8h to a few seconds in desktop grid settings.
3289 * Supernovae brings about 25% speedup on i386.
3291 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 24 Dec 2009 19:07:39 +0100
3293 SimGrid (3.3.3) stable; urgency=low
3295 The "Need for Speed" release.
3297 The timings done to validate the 3.3.2 were faulty.
3298 Instead of being 5% faster, it was 15% slower (compared to 3.3.1).
3300 The problem was a conversion from a manually handled vector to
3301 xbt_dynar_t on the critical path.
3302 xbt_dynar_foreach calls functions, inducing stack management crap.
3304 We inlined these functions and xbt_dynar_foreach is now breath taking.
3305 We also inlined xbt_swag_belong on the way.
3307 Here are some approximate speedup measurements (on master/slaves
3308 simulations lasting between 10s and 20s each):
3309 3.3.1 -> 3.3.2: about same performance
3310 3.3.2 -> 3.3.3: 40% speedup
3311 3.3.1 -> 3.3.3: 40% speedup
3312 3.3.1 with inline patch -> 3.3.3: 30% speedup
3314 Our reading is that the refactoring which occurred in 3.3.2 made us
3315 suffer much more from the xbt_dynar_foreach low performance, but
3316 once we solved this, this refactoring proved to be very performance
3317 effective. From the 40% speedup, somehow, 10% are due to the
3318 inlining and 30% to the refactoring.
3320 That's a pitty that gcc cannot inline functions placed in other files
3321 alone. We have to choose between:
3322 - break the encapsulation (by putting private data structures and
3323 accessors in headers files to help gcc)
3324 - live with low performance
3325 - switch to a decent compiler such as icc (not quite possible).
3327 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 20 Aug 2009 21:21:33 +0200
3329 SimGrid (3.3.2) stable; urgency=low
3331 The "Simplicity does not preceed complexity, but follows it" release.
3333 The main contributors of this release were (lexical order):
3334 Silas De Munck, Stéphane Genaud, Martin Quinson, Cristian Rosa.
3337 * Extract the routing logic into its own object.
3338 (was dupplicated in network.c and workstation_LV07.c;
3339 Allows to implement other ways of storing that info)
3340 => kill now useless network_card concept
3341 - Use dynar to represent routes (instead of void** + int*)
3342 - kill link_set (use surf_network_model->resource_set instead)
3343 - Add a command-line option to choose the routing schema to use
3344 - Add three new models:
3345 * Floyd (shortest path computed at initialization)
3346 * Dijikstra (shortest path recomputed all the time)
3347 * Cached Dijikstra (shortest path computed on need)
3348 All these models where contributed by Silas De Munck, and are
3349 described in his ICCS09 paper.
3351 * Simplify model declaration
3352 (less redirections, less function to write when defining a model)
3353 - Factorize stuff between models:
3356 surf_model_resource_set(model)
3357 surf_model_resource_by_name(model, name)
3358 - Unify the types of models in s_surf_model_t (using an union)
3359 - Embeed fields of common_public directly into s_surf_model_t
3360 - Rename model methods:
3361 action_free ~> action_unref
3362 action_change_state ~> action_state_set
3363 action_get_state ~> action_state_get
3364 - Change model methods into functions:
3365 (model)->common_public->action_use ~> surf_action_ref
3367 * Implement a generic resource; use it as ancestor to specific ones
3368 (allows to kill duplicated code in models)
3369 Drawback: timer command don't need no name nor properties;
3370 workstation_CLM03 don't need no properties
3371 (but I guess we can live with those few bytes wasted)
3373 * Improve the action object model
3374 - implement a constructor avoiding dupplicated code about field
3375 initialization in generic_action part.
3377 * Kill the SDP model: it has an external dependency, is deprecated
3378 in flavor of modern lmm models, and didn't compile since a while
3381 * Relocation of the context module from XBT to SIMIX.
3382 (the context were decoupled from the simix processes, duplicating a lot of code)
3383 => a lot of code was factorized
3384 - less overhead is introduced during scheduling
3385 - simpler API for the context factory
3386 - the logic for process creation,destruction and manipulation was simplified
3387 * Simplification of the s_smx_process_t data structure.
3388 => accesing the simix level data associated to a process is faster now,
3389 and the code is a lot more readable.
3392 * Implement some more MPI primitives:
3393 MPI_Bcast, MPI_Waitany, MPI_Waitall, MPI_Reduce, MPI_Allreduce, MPI_Scatter, MPI_Sendrecv, MPI_Alltoall
3394 -implementation: Bcast: flat or 2-ary tree (default),
3395 Barrier: 4-ary tree,
3397 Allreduce: Reduce then Bcast
3398 Alltoall: "basic_linear" if data per proc < 3Kb, "otherwise pairwise".
3399 Not yet implemented: "Bruck" for data per proc < 200b and comm size > 12
3400 Alltoallv: flat tree, like ompi
3402 * Add support for optimized collectives (Bcast is now binomial by default)
3403 * Port smpirun and smpicc to OS X
3406 * Kill SD_link_get_properties: hard to maintain and makes very little sense
3407 Shout out if you used it.
3410 * Display the list of still queued messages in SG mode when existing
3414 * Add xbt_set_get_by_name_or_null() [Silas De Munck]
3415 * Add xbt_graph_node_get_outedges() [Silas De Munck]
3416 * Add xbt_str_from_file(FILE*)
3417 * Add xbt_dict_get_key achieving a linear reverse search
3418 * Remove the context module
3420 Portability report of this version:
3421 * Main portability targets:
3422 - Linux(debian)/x86/context
3423 - Linux(debian)/x86/pthreads
3424 - Linux(debian)/amd64/context
3425 - Linux(debian)/amd64/pthreads
3426 On these, we still have the eratic breakages of gras/pmm and
3427 amok/saturate_sg reported in previous version. We still think
3428 that the tests are the cause of the fault, not the tested code.
3430 - Mac OSX Leopard/x86/context
3431 Still false negative in tesh autotesting.
3432 Smpi still fails, but this time because readlink does not accept -f
3433 Everything seems to work properly beside of that.
3436 - AIX version 5.3 (only tested contexts this time)
3437 Smpi still fails there because mktemp is not installed.
3438 Everything seems to work properly beside of that.
3440 I managed to compile it for the first time, but several breakages.
3441 Won't delay the release for this exotic platform.
3443 * Windows: it's still lagging behind. If you want to help, please
3446 Timing report of this version:
3447 This version seem to be more than 5% faster than 3.3.1 (on linux
3448 64bits with contextes). The gain is less than expected, we are
3449 investigating this for next release.
3451 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Wed, 19 Aug 2009 17:07:12 +0200
3453 SimGrid (3.3.1) stable; urgency=low
3456 * Implement a --cfg-help to show existing configuration variables
3457 * Build chain do not require doxygen in maintainer mode
3460 * fix a bug on struct sizeof computation, which prevented the
3461 exchange of arrays of structs in some conditions
3462 - added a regression test about this in datadesc_usage
3463 * Allow the exchange of 0-long dynamic vectors.
3464 - for that, use -1 as indicator of dynamic size instead of 0
3465 - This implied to change any size from unsigned long to long,
3466 reducing a bit communication abilities, but I guess that with
3467 64bits being quite common, this is more than enough.
3468 - This also induce a protocol change, thus bumping network protocol
3469 version from 0 to 1 (if we have external users, we have to get
3470 clean on that point too ;)
3471 - added two regression tests about this in datadesc_usage
3472 * Be more verbose when propagating local exceptions
3473 This helps debugging.
3474 * Display the status of simulated processes when receiving SIGINT in
3478 * Allow to control the simulation from a trace file.
3479 New functions MSG_action_register() and MSG_action_trace_run()
3480 The first one allows to associate a function execution to each
3481 kind of action while the second one parses a trace file and
3482 triggers the corresponding actions within the system.
3483 For now, only a toy example is provided in examples/msg/actions
3484 * Add an example of process migration in examples/msg/migration
3485 * Fix a bug in task exchange which broke MSG_task_get_sender()
3486 Add a teshsuite regression test for that.
3487 [Bug: if MSG_task_get_sender() is called after sender exit,
3489 * Fix a bug which prevented suspend/resume to work properly
3490 * Display the status of simulated processes when receiving SIGINT
3491 This fixes a regression of v3.3. due to the introduction of SIMIX
3492 * Bug fixing in failure management:
3493 - trace could not start by a failure at time 0
3494 - failure during communications were not working
3497 * Add SIMIX_process_set_name() to change the name of the current
3498 process in the log messages.
3499 * Store smx_hosts in a dict since we only retrieve them by name
3500 * Move the configuration infrastructure to surf
3503 * Move the configuration infrastructure to surf
3506 * Massive internal cleanups:
3507 - Store internal structures on processes instead of hosts (allows
3508 to have more than one process per host, in addition of being more
3510 - Cleanup the initialization/finalization process
3511 - Kill a whole bunch of unneeded synchronization:
3512 processes run in exclusive manner within the simulator
3513 - Move queues from global tables to process data fields
3515 - now accept -platform and -hostfile arguments
3516 - Pass the right rank value to processes according to the hostfile
3517 * Compile the examples by default, and use them as regression tests
3518 * Implement MPI_Wtime()
3519 * Change the reference speed to a command line option
3522 * TCP_gamma can now be specified as command line option using
3523 --cfg=TCP_gamma:10000000.0
3524 * Change the --surf-path cmd line option into --cfg=path:
3527 * Also include strbuff from xbt.h public header
3528 * xbt_ex_display(): do not free the exception after displaying
3529 This allows to do more with the given exception afterward.
3530 Users should call xbt_ex_free() themselves.
3534 Portability report of this version:
3535 * Main portability targets:
3536 - Linux(debian)/x86/context
3537 - Linux(debian)/x86/pthreads
3538 - Linux(debian)/amd64/context
3539 - Linux(debian)/amd64/pthreads
3540 These targets fail about 1/10 of times on gras/pmm, but we believe
3541 that this is because of the test, not because of simgrid.
3542 amok/saturate_sg fails even more rarely, and the test may not be
3545 - Mac OSX Leopard/x86/context
3546 The test suite still spits tons of errors because some obscure
3547 force prevents us from removing the temporary directories
3548 arguing that they still contain some metadata I've never heard of.
3549 Smpi fails because seq is not installed.
3550 Everything seems to work properly beside of that.
3553 - AIX version 5.3 (both contexts and pthread)
3554 Smpi still fails there because mktemp is not installed.
3555 XML inclusions seems rosty on AIX.
3557 * Windows: it's still lagging behind. If you want to help, please
3560 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Sat, 27 Jun 2009 00:14:30 +0200
3562 SimGrid (3.3) stable; urgency=high
3566 * JAVA BINDINGS for MSG (you dreamt of them? We made them)
3567 [Malek Cherier & Mt]
3569 * Introduce the SIMIX module: factorize code between MSG and GRAS.
3572 Until now, GRAS were using MSG as an interface to SURF. It was
3573 quite difficult because both interface have several differences
3574 (MSG channels vs GRAS sockets were the most notable point).
3576 This also opens the gate to SMPI (which should occur soon) and speed
3577 up simulations by to 40% (even if it were not the main goal).
3579 **************************************
3580 *DO NOT MIX 3.2 RESULTS WITH 3.3 ONES* Simix may changes simulations!
3581 **************************************
3582 The point is that events occurring at the exact same timestamp are
3583 not scheduled in the same order with the old and new version. This
3584 may be enough to completely change the execution of simulations in
3585 some cases. Sorry for the inconvenience.
3587 * Cleanup and upgrade the XML format to push further scalability
3588 issues (check http://hal.inria.fr/inria-00256883/ for more info)
3590 * Improve the testing infrastructure with tesh. Now a very large part of
3591 the code is tested not only by being run but also by checking that the
3592 output match an expected output [Mt].
3594 * Move on to FleXML v1.7 for the embeeded XML parsers. This version
3595 is really less memory-demanding, which should allow you to use
3596 larger files in SimGrid [AL].
3598 * Inform valgrind about our contextes, so that it becomes usable
3599 with the default (and more effecient) version of SimGrid
3600 [contributed by Sékou Diakite, many thanks]
3603 * Introduce a listener thread in charge of receiving incoming
3604 messages from the network. It allows to overlap communication and
3605 computation but most notably, it removes some stupid deadlocks due
3606 to the fact that so far, a process could not send and receive at
3607 the same time. This made most non trivial communication schema
3609 * Convert the PIDs from long int to int to match the MSG ones (and
3610 linux ones too) [Mt]
3611 * New function: gras_agent_spawn() to launch a new process on
3612 current host. Only working in simulation for now. [Mt]
3613 * New function: gras_os_hostport() returning a constant form (ie,
3614 not needing to be freed) of "gras_os_hostname():gras_os_myport()"
3617 * Make the backtrace of exceptions more human readable [Mt]
3618 * New module: xbt/str [Mt]
3619 a ton of string utility functions (split, join, printf to a newly
3620 allocated buffer, trim, etc)
3621 * New module: xbt/hash [Mt]
3622 SHA1 hashing algorithm (more to come if needed)
3623 * New module: xbt/synchro [Mt]
3624 synchronization tools (mutex and conditions) working the same way
3625 in simulation and in real life (mainly useful for GRAS, but not
3627 * New module: xbt/queue [Mt]
3628 classical producer/consumer synchronization scheme
3629 * xbt_dynar_new_sync() creates a synchronized dynar. All access
3630 (using the classical functions will get serialized) [Mt]
3631 * Make dictionary internal table dynamic. No need to specify its size
3632 anymore; functions xbt_dict_new_ext() and xbt_dict_hashsize_set()
3634 * Make sure the log channels are organized as a tree under windows
3635 (because of ANSI C compatibility issue, any channel were child of
3636 root directly) [Mt].
3639 * Cleaned many thing in surf and fixed a few bugs [AL].
3640 * Add a nice command line configuration mechanism to compose models [AL].
3641 * Add a new model for parallel tasks (ptask_L07) that is less buggy than
3642 the previous one (KCCFLN05). It relies on something that looks like
3643 a max-min sharing mechanism but cannot be written as such. A new solver
3644 was thus designed [AL].
3645 * Add a new solver to lmm. Based on Lagrange optimization and
3646 gradient-based descent, it enables to efficiently maximise systems s.a
3648 sum f_i(x_i) s.t Ax<= b with A_{i,j}>=0 and f_i a concave function.
3650 This solver enables to propose two new network models for TCP Reno and
3651 TCP Vegas based on Low's work. These models still need to be fully
3652 tested though [Pedro Velho].
3655 * Bug fix in SD_simulate. Now the time bound given as argument is
3657 * Use the new parallel task model (ptask_L07) as default.
3658 * Use the SURF command line configuration mechanism.
3659 * 0-size tasks (for synchronization) should now work.
3661 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Sun Apr 12 05:20:36 CEST 2009
3663 SimGrid (3.2) stable; urgency=high
3667 We still experience issues on this platform, but we believe that at
3668 least MSG is usable.
3670 GRAS API BREAKAGE (for simplification purpose, sorry):
3671 * the gras_msgtype_by_name is not used anymore. Instead of
3672 gras_msg_send(toserver, gras_msgtype_by_name("request"), &request);
3673 you can write (and must)
3674 gras_msg_send(toserver, "request", &request);
3675 - If you still want to pass a gras_msgtype_t to the function (to cache
3676 the type and avoid the lookup time), use the gras_msg_send_() variant.
3677 - Impacted functions:
3678 gras_cb_register, gras_cb_unregister, gras_msg_send, gras_msg_wait,
3679 gras_msg_rpccall, gras_msg_rpc_async_call, gras_msg_wait_ext
3680 * The callbacks are now expected to return 0 when everything went well
3681 (just like the main() function)
3683 GRAS new features and improvements:
3684 * New module mechanism where user code can use per process globals [Mt]
3685 This is similar to gras_userdata_*() functions, but for libraries. It
3686 factorize some code developped over and over in the examples and AMOK.
3687 It has still to be documented and used (only amok/peermanagement is
3689 * Fix a vicious bug in the TCP buffering mechanism which leaded to message
3690 loss when they were small enough to fit into the buffer and sent quickly
3691 enough so that they can all get received in one shoot.
3692 * gras_datadesc_by_name and gras_msgtype_by_name: now raise an exception
3693 if not found. Use the *_or_null() variant for the old semantic.
3694 * In gras_msg_handle, do not discard messages without callback.
3695 They are probably messages to be explicitly awaited later (ie, proofs of
3696 mis-synchronization in userland since they are sent before being awaited)
3697 No big deal usually.
3698 * gras_socket_meas_send/recv: semantic changed!
3699 The numerical arguments used to be (1) the total amount of data to send
3700 and (2) msg_size. This was changed to (1) msg_size and (2) amount of
3701 messages. This was need for the fool willing to send more than MAXINT
3702 bytes on quite fat pipes.
3705 * Do really rename the hostmanagement module to peermanagement. [Mt]
3706 Ie, rename functions from amok_hm_* to amok_pm_*. This breaks the API,
3707 but this is rather new and this was documented in the module
3708 documentation (poor excuses, I admit)
3709 * Bandwidth measurement semantic changed! This follows the changes to
3710 gras_socket_meas_send/recv explained above.
3713 * A sequential mode has been added to the workstations. When a workstation
3714 is in sequential mode, it can execute only one task, and the other tasks
3715 are waiting in a FIFO. [Christophe Thiery]
3718 * The KCCFLN05 workstation model now handles parallel tasks. It is the
3719 model for SIMDAG. [Christophe Thiery]
3720 * Bug fix in the maxmin solver: Some values were close to 0 instead of
3721 equal to 0, which caused some bad behaviors in
3722 saturated_constraint_set_update. I now use a threshold mechanism like in
3726 * When running manually src/testall, you select specific units [Mt]
3727 testall is the result of our cunit mechanism, and should replace all
3728 the scripty thingy around since bash don't run easily on billware.
3730 * A mallocator system has been added. [Christophe Thiery]
3731 Mallocators allow you to recycle your unused objects instead of freeing them
3732 and allocating new ones.
3734 Documentation update:
3735 * FAQ reworking + New FAQs:
3736 - "Valgrind spits tons of errors!" [Mt]
3737 - "How to repport bugs" [Mt]
3738 - "Cross-compiling a Windows DLL of SimGrid from Linux" [Mt]
3739 - "What is the difference between MSG, SimDag, and GRAS?" [Mt]
3740 - Communication time measurement within MSG [AL]
3741 - I experience weird communication times when I change the latency [AL]
3742 * GRAS tutorial [Mt]
3744 - an introduction to the framework and to the used communication model
3745 - an initiatic tour introducing the most proheminent features:
3747 . Lesson 0: Installing GRAS
3748 . Lesson 1: Setting up your own project
3749 o Part 2: Message passing
3750 . Lesson 2: Exchanging simple messages
3751 . Lesson 3: Passing arguments to the processes (in SG)
3752 . Lesson 4: Attaching callbacks to messages
3753 . Lesson 5: Using globals in processes
3754 . Lesson 6: Logging information properly
3755 . Lesson 7: Using internal timers
3756 . Lesson 8: Handling errors through exceptions
3757 . Lesson 9: Exchanging simple data
3758 . Lesson 10: Remote Procedure Calling (RPC)
3759 . Lesson 11: Explicitly waiting for messages
3760 . Recapping of message passing features in GRAS
3761 - A HOWTO section containing:
3762 o HOWTO design a GRAS application
3763 More are due, of course. They will come latter. In the meanwhile, you can
3764 check the examples which are still here.
3766 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri Mar 16 21:11:46 CET 2007
3768 SimGrid (3.1) stable; urgency=high
3772 There was a stack corruption somewhere, visible only when optimizing
3773 with these versions. [Vince]
3776 * This is a NEW module! SimDAG (SD for short) is a revival of the old SG
3777 module that enabled to play with Directed Acyclic Graphs. It is built
3778 directly on top of SURF and provides an API rather close to the old
3779 SG. Some old codes using SG are currently under rewrite to check that
3780 all needful functions are provided. [Christophe Thiery]
3783 * Complete rewrite of the KCCFLN05 workstation model. It is now an
3784 extension of the classical CLM03 model that gracefully handles
3785 failures. This is now the default model for MSG and GRAS. It doesn't
3786 handle parallel tasks yet though. [AL]
3787 * Bug fix: Weights were not correctly set in the network part.
3788 WARNING: This may have resulted in incorrect results with simulations
3789 where there are more than one flow on a given link. [AL]
3792 * After a (long ?) discussion on simgrid-devel, we have decided that the
3793 convention we had on units was stupid. That is why it has been decided
3794 to move from (MBits, MFlops, seconds) to (Bits, Flops, seconds).
3795 WARNING: This means that all previous platform files will not work as
3796 such with this version! A warning is issued to ask users to update
3798 A conversion script can be found in the contrib module of the CVS, under
3799 the name contrib/platform_generation/surfxml_update.pl [MQ]
3802 * Bug fix: Processes were started in reverse order, wrt deployment file.
3803 WARNING: if your code relies on this bug, please fix it. [AL]
3804 * Bug fix: Add a test in MSG_task_execute to stop whenever a task is
3805 being executed on two different locations. [AL]
3806 * Bug fix: Failures are now better supported thanks to Derrick's tests
3807 (there was many failure situations I hadn't thought of and that weren't
3808 correctly handled). [AL]
3809 * New function: MSG_host_is_avail indicates you whether a given m_host_t
3813 * New! a real RPC mechanism, as it ought to be since too long. [MQ]
3814 Exception occurring on server-side are propagated back to client (!).
3816 API CHANGE: the callback changed their prototype. Change:
3817 int my_handler(gras_socket_t expeditor, void *payload_data) {
3819 int my_handler(gras_msg_cb_ctx_t ctx , void *payload_data) {
3820 gras_socket_t expeditor=gras_msg_cb_ctx_from(ctx);
3822 * New! function: gras_msg_handleall to deal with all messages arriving
3823 within a given period.
3824 * New! function: gras_socket_server_range to get a server socket in a
3825 range of port numbers (ease to avoid port number conflicts) [MQ]
3826 * New! gras processes display their backtrace when they get a SIGUSR1
3827 or when Ctrl-C is pressed. Use Ctrl-C Ctrl-C to exit.
3828 Sweet to debug RL processes [MQ]
3832 - Do not force experiment sizes to be expressed in kb, or it becomes
3833 impossible to measure the latency this way (needs one byte-long tests)
3834 WARNING: this changes the amok_bw_* function semantic. [MQ]
3835 - Implements the link saturation stuff. [MQ]
3836 * Peer management module:
3837 New! module factorizing code that we wrote over and over [MQ].
3840 * New module: cunit (my jUnit implementation in ansi C) [MQ]
3841 - Test units are placed directly into the library code, they get extracted
3842 automatically and placed into the src/testall binary.
3843 - Convert most of the XBT tests to this system.
3844 * New functions: xbt_dynar_getfirst_as() and xbt_dynar_getlast_as() [MQ]
3845 * XML parsing: rewrote parts of flexml to enable multiple xml parsers to
3846 live in the same C code. This required to change a little bit the API
3847 of surfxml parsing but shouldn't be an issue for end-users. [AL]
3848 * New module: sparse graph structure with basic algorithms (this is work
3849 in progress and the API is not considered to be frozen yet). [AL]
3850 * Display more information on backtraces: source line & function names are
3851 now displayed just like valgrind does (rely on addr2line tool) [MQ]
3852 * New function: xbt_backtrace_display(). Sweet while debugging [MQ]
3853 * Reworked a little bit some #include statements to load only required
3854 headers. Some user code that relied on SimGrid to include stdlib or
3855 stdio may need to include it by themselves. [AL]
3856 * Fixed xbt/log.h. A missing SG_BEGIN_DECL prevented compilation with
3858 * Renamed xbt_host_t into xbt_peer_t since it betterly describes what I
3859 meant. This breaks the API of AMOK and of xbt/config. Sorry about this,
3860 but I guess that almost nobody used those parts. [MQ]
3862 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 14 Jul 2006 01:32:27 +0200
3864 SimGrid (3.0.1) stable; urgency=low
3867 * Unfortunately, I had missed 5 misnamed functions:
3868 xbt_fifo_item_t xbt_fifo_newitem(void);
3869 void xbt_fifo_freeitem(xbt_fifo_item_t);
3870 xbt_fifo_item_t xbt_fifo_getFirstItem(xbt_fifo_t l);
3871 xbt_fifo_item_t xbt_fifo_getNextItem(xbt_fifo_item_t i);
3872 xbt_fifo_item_t xbt_fifo_getPrevItem(xbt_fifo_item_t i);
3873 They're now deprecated. Please use their new versions:
3874 xbt_fifo_item_t xbt_fifo_new_item(void);
3875 void xbt_fifo_free_item(xbt_fifo_item_t);
3876 xbt_fifo_item_t xbt_fifo_get_first_item(xbt_fifo_t l);
3877 xbt_fifo_item_t xbt_fifo_get_next_item(xbt_fifo_item_t i);
3878 xbt_fifo_item_t xbt_fifo_get_prev_item(xbt_fifo_item_t i);
3880 * Bugfix: really disconnect fifo items which are remove_item()ed [AL]
3881 * Documentation: xbt_log module unmercifully reworked [MQ]
3882 * Bugfix: there was a problem with the ending of contexts with
3883 the pthread backend. It caused some weird deadlock or behavior
3884 depending on the pthread implementation. [AL]
3885 * Bugfix: get the exceptions raised in the simulator repport where
3886 and why they come from when they are not caught in time [AL, MQ]
3889 * Bugfix: Do repport the error when two non-connected hosts try to
3890 exchange data (Thanks to Flavien for stumbling into this one) [AL]
3893 * Add additionnal checkings on communications. Assert that two
3894 communicating hosts are connected by a set of links... [AL]
3897 * Add additionnal checkings on channel values in communication [AL]
3898 * New: MSG_task_get_source to see on which host a task was generated [HC]
3899 * New: int MSG_task_probe_from_host(int channel, m_host_t host): returns
3900 the number of tasks waiting to be received on channel and sent
3902 * New: MSG_error_t MSG_task_get_from_host(m_task_t * task, int channel, m_host_t host);
3903 waits for the first task coming from a given host.. [AL]
3905 GRAS new functionnalities: [MQ]
3906 * Enhance the parsing macro to allow the size of multidimentional objects
3907 to be given thru annotations.
3908 * New example (and documentation): Matrix Multiplication a la RPC
3909 (as when I was young!) and fix a bunch of bugs found on the way.
3911 GRAS performance improvements: [MQ]
3913 * Reduce the amount of cbps creation/destruction by making it static to
3914 datadesc_send/recv() and using a (newly created) cbps_reset (based on
3917 * Change libdata to a set so that we can search for stuff by ID (and thus
3918 reduce the insane amount of dict lookups)
3921 * Actually implement gras_datadesc_copy() so that we don't have to mimick
3922 RL communication on top of SG since it's so uneffective.
3923 It may also be used for inter-thread communication in RL, one day.
3924 * Use gras_datadesc_copy() to exchange messages on top of SG
3926 - improve message exchange performance on top of SG
3927 - deprecate transport_plugin_sg.c:gras_trp_sg_chunk_send() & recv()
3928 * Don't exchange on the network the size of the used part of buffer,
3929 instead, specify the possible buffer size to read().
3931 - reduces the amount of read/write calls (one pair per exchange)
3932 - reduces the amount of exchanged data (the size)
3933 - allows to retrieve all arrived data on receiver side, if we don't need
3934 it right now (subsequent read will peek the buffer)
3935 - allows the receiver to proceed with the beginning of the stream before
3936 everything is arrived
3937 - make it possible to build an iov transport (using readv/writev)
3939 - take care of the data with non-stable storage (like stacked data),
3941 * If possible, TCP send uses vector I/O (when writev() is here)
3942 - Don't use it for receive since we send data sizes and data on the
3943 same stream, so we wouldn't be able to chain large amount of chunks
3944 before having to flush the stuff to read the size.
3945 * Rework the transport plugin mechanism to simplify it and reduce the
3946 amount of pointer dereferencement when searching for the right function
3949 * I guess that now, we do almost as few system calls as possible while
3950 doing as few data copy as possible.
3952 To improve it further, we could try to send all the sizes first and then
3953 all the data (to use iov on receiving size), but it's only a partial
3954 solution: when you have 2 dimensional data, the sizes of the second
3955 dimension is data of the first dimension, so you need 3 streams.
3957 I'm not sure the potential performance gains justify the coding burden.
3959 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 21 Oct 2005 14:42:20 +0200
3961 SimGrid (3.00) stable; urgency=high
3964 * New! Give the possibility to hijack the surf parser and thus bypass
3965 MSG_create_environment and MSG_launch_application. Have a look at
3966 examples/msg/msg_test_surfxml_bypassed.c to see how it can be done.
3968 -- Arnaud Legrand <simgrid-devel@lists.gforge.inria.fr> Sat, 20 Aug 2005 23:25:25 -0700
3970 SimGrid (2.96) unstable; urgency=low
3975 * New! Exception handling with setjmp or such (code from OSSP ex) [MQ]
3976 This deprecates the xbt_error_t mechanisms.
3977 It modifies (simplifies) all XBT and GRAS API.
3978 MSG API keeps unchanged (exceptions raised by XBT are caught from
3979 within MSG and masked with existing error handling facilities)
3982 * New! Add a FATPIPE model. [AL]
3983 * New! Add a parallel task model. [AL]
3984 * New! Add automatically a loopback interface (in the default
3985 network model) if none was precised.
3988 * Bugfix: MSG_process_resume now works with the current running process.
3990 * New! Add MSG_parallel_task_create and MSG_parallel_task_execute. [AL]
3991 * Modification of MSG_task_get_compute_duration. Once a task has been
3992 processed, the value returned by this function is now equal to 0. [AL]
3993 * New! Add double MSG_task_get_remaining_computation(m_task_t task) and
3994 MSG_error_t MSG_task_cancel(m_task_t task). Add a state
3995 (MSG_TASK_CANCELLED) to MSG_error_t corresponding to the cancelation
3996 of a m_task. For now, MSG_task_cancel only works with computation
3998 * New! Add double MSG_get_host_speed(m_host_t h) that returns the speed
3999 of the processor (in Mflop/s) regardless of the current load on the
4001 * API Change: use proper naming convention for MSG_getClock and
4002 MSG_process_isSuspended: MSG_get_clock and MSG_process_is_suspended.
4004 * New! Add void MSG_task_set_priority(m_task_t task, double priority).
4005 This function changes the priority of a computation task. This priority
4006 doesn't affect the transfer rate. A priority of 2 will make a task
4007 receive two times more cpu power than the other ones. This function
4008 has been added to suit the needs of Nguyen The Loc and hasn't been that
4009 much tested yet. So if it fails, please report it and send me your code.
4011 * API Change: removed all functions and types that were marked "deprecated"
4012 since many months. Renamed MSG_global_init_args to MSG_global_init.
4014 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Mon, 8 Aug 2005 17:58:47 -0700
4016 SimGrid (2.95) unstable; urgency=low
4019 * Steal some nice code to GNU pth to fix context detection and usage [AL]
4020 * Cleanup in the xbt_config API; add configuration callbacks. [MQ]
4021 * Cleanup in the initialization API: the unused "defaultlog" is dead. [MQ]
4024 * Bugfix: Allow absolute paths for platform description files [MQ]
4025 * Bugfix: do free the variables after use. Leads to drastic performance
4027 * Implement max_duration (ie, timeouts) on resources [AL]
4030 * Implement MSG_config to configure MSG at runtime. xbt_cfg test on a real
4032 * Implement MSG_channel_select_from() to help GRAS now that SURF provide
4033 the needed support (timeouts) [AL]
4036 * Implement measurement sockets. You can now get the bandwidth between two
4037 hosts thanks to AMOK (see below). [MQ]
4038 * gras_datadesc_dynar() builds a dynar type descriptor, allowing to send
4039 dynar over the network (yeah) [MQ]
4040 * Real (even if simplistic) implementation of gras_os_myname() on RL [MQ]
4041 * simple/static token-ring example. [Alexandre Colucci and MQ]
4042 * Use MSG_channel_select_from() and remove the *slow* hack we had to put
4043 in place before [MQ]
4046 * Differentiate the types "char[22]" and "unsigned char[22]" in automatic
4047 type parsing. "short" and "long" modifiers were also ignored; other
4048 modifier (such as reference level) are still ignored. [MQ]
4049 * Embeed the buffer size within the buffer itself on SG. [MQ]
4050 That way, send() are atomic and cannot get intermixed anymore (at least
4051 the ones which are less than 100k; bigger messages still have the issue)
4052 * Array size pushed by the field, not by the field type (or each
4053 and every long int will push stuff to the cbps) [MQ]
4054 * use select() to sleep since it allows to portably sleep less than one
4057 GRAS (minor cleanups)
4058 * <project>.Makefile.local (generated from gras_stub_generator) |MQ]:
4061 * Type Callbacks now receive the gras_datadesc_type_t they work on as argument.
4062 * type category 'ignored' killed as it was never used and were difficult
4064 * whether a type can cycle or not is now a flag, leaving room for more
4065 flags (as "ignored", if we feel the need one day ;)
4066 * Rename raw sockets to measurement sockets since "raw" has another
4067 meaning in networking community.
4070 * Advanced Metacomputing Overlay Kit introduction. It is based over GRAS
4071 and offers features not belonging to GRAS but that most applications
4072 need. One day, it may be a set of plugins loadable at runtime.
4073 * New module: bandwidth
4074 bandwidth measurement between arbitrary nodes running this module. [MQ]
4076 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 30 Jun 2005 16:29:20 -0700
4078 SimGrid (2.94) unstable; urgency=low
4080 The first beta release of SimGrid 3 !
4084 * Update the main page and the FAQ. Adding references to gforge.
4087 * Add a gras_os_getpid function.
4090 * Add MSG_task_get_compute_duration() and MSG_task_get_data_size()
4091 * Extend the logs so that they also print PID, hostname, date, ... if
4093 * Convert the MSG example to the use of xbt_logs instead of PRINT_MESSAGE,
4094 and kill the old version which were in testsuite/
4095 * Rewrite tools/MSG_visualization/colorize.pl for using with logs instead
4099 * Add xbt_os_time(). As the rest of xbt/portability, this is not public
4100 for users. Instead, each programming environment (GRAS, MSG,...) use it
4101 when needed to provide such a feature to users.
4102 Don't shortcut the mechanism or you will also shortcut the virtualization
4103 you need on the simulator.
4107 * Cleanups in configury with regard to compile optimization/warning flags.
4108 Also add -fno-loop-optimize to any powerpc since it's the optimization
4109 killing gcc (< 3.4.0).
4110 * Doxygen cleanups: move MSG examples, kill the second Doxygen phase
4111 needed by MSG examples complications
4112 * Borrow configury beautifications from PHP
4115 * Bugfix: XBT_LOG_NEW_DEFAULT_CATEGORY now compiles without compiler
4116 warning (thanks loris for stumbling into this one).
4117 * Bugfix: stop loading private headers (gras_config.h) from the public
4121 * Change SIMGRID_INSTALL_PATH to GRAS_ROOT in Makefiles generated for user.
4122 * Rename gras_get_my_fqdn to gras_os_myname and implement it in the simulator
4123 RL would imply a DNS resolver, which is *hard* to do in a portable way
4124 (and therefore delayed).
4125 * Implement a real timer mechanism and use it in timing macros. This allows
4126 to avoid rounding errors and get a 0.000005 sec precision in timing
4127 macros. While I was at it, various cleanups:
4128 - allow to declare more than one timed section per file (fix a stupid bug)
4129 - move some private declaration to the right place
4130 - merge conditional execution and timing macros into emulation module
4131 - document the module
4132 - make sure the module cleanups its mess on gras_exit
4133 * Documentation improvements:
4134 - (new) how to compile applications using GRAS
4135 - (new) emulation support (timing macros)
4137 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 13 May 2005 10:49:31 +0200
4139 SimGrid (2.93) unstable; urgency=low
4141 Alpha 4 on the path to SimGrid 3 (aka the "neuf-trois" version)
4144 - Use Paje properly where used. Still to be sanitized properly.
4145 - Portability fix: Add an implementation of the contexts using pthread
4149 - Add xbt_procname(): returns the name of the current process.
4150 Use it to show the current process's name in all logging.
4152 - fix detection of older flex version and the reaction, since we do
4153 depend on modern ones (we use lex_destroy)
4154 - Better separation of SG and RL in the libs: remove all simulation code
4155 from libgras. As a result, this lib is now only 200k when stripped.
4156 Some of the xbt modules may also be duplicated (two sets and such) and
4157 should be cleaned/killed before SG3.
4158 - Insist on using xlC on AIX because of weird problems involving gcc there.
4159 - Cleanup the make remote stuff. This is now done by scripts
4160 tools/graspe-{master,slave} (GRAS Platform Expender). This is still
4161 mainly for our private use, but we're working on changing them to user
4164 - Bugfix: flush the socket on close only if there is some *output*.
4165 - Bugfix: flush idempotent when there's nothing to send (don't send size=0)
4167 - Add MSG_task_get_name. The task names are mainly for debugging purpose,
4170 -- SimGrid team <simgrid2-users@listes.ens-lyon.fr> Fri, 4 Mar 2005 14:32:37 -0800
4172 SimGrid (2.92) unstable; urgency=low
4174 Alpha 3 on the path to SimGrid 3
4178 - New! First try of benchmarking macros.
4179 - New! First try so that gras_stub_generator generate deployment and
4180 remote compilation helpers.
4182 - Bugfix: Initialization fix in msg_test.
4186 - Bugfix: applied patch to lexer so that it doesn't need a huge heap.
4188 - Bugfix: let dicts work with NULL content (_foreach didn't) and cleanups
4190 - API Change: gras_os_sleep to take the amount of seconds as a double.
4191 Accepting an int was error prone since it was the only location where
4192 seconds were coded as such. It leaded to damn rounding errors.
4193 - Bugfix: Hard to belive that timers ever worked before this.
4195 -- SimGrid team <simgrid2-users@listes.ens-lyon.fr> Wed, 23 Feb 2005 22:09:21 +0100
4197 SimGrid (2.91) unstable; urgency=low
4199 Alpha 2 on the path to SimGrid 3
4203 - Bug fix in the lmm_solver.
4205 - New! Interface to Paje (see http://www-id.imag.fr/Logiciels/paje/)
4206 through the function MSG_paje_output.
4207 - New! Introducing two new functions MSG_process_kill() and MSG_process_killall().
4208 - It is possible to bound the rate of a communication in MSG with
4209 MSG_task_put_bounded() (was already in the previous version but I had forgotten
4210 to write it in the changelog).
4211 - Bug fix to let GRAS run on top of MSG until we move it directly on top
4216 - Various cleanups to the autotools stuff
4217 - Begin to move Gras examples to examples/gras/
4218 - Let make distcheck work again (yeah!)
4220 - documentation overhauled using doxygen.
4221 gtk-doc-tools is dead in SimGrid now.
4222 - Automatically extract all existing logging categories, and add the list
4223 to the documentation (long standing one, to say the less)
4225 - Cleanup the known architecture table. Reorder the entries to group what
4226 should be, and use a more consistent naming scheme.
4227 (some of the test dataset are still to be regenerated)
4228 - New! Allow library to register globals on each process just as userdata
4230 This is implemented using a xbt_dict and not a xbt_set, so we loose the
4231 lookup time (for now).
4232 Use it in msg and trp.
4233 This cleans a lot the internals and helps enforcing privacy of the
4234 headers between the gras components.
4235 - New! Add a timer mechanism, not unlike cron(8) and at(1).
4236 - Bugfix: gras_os_time was delirious in RL.
4237 - Bugfix: gras_trp_select/RL don't run into the wall when asked to select
4239 - Reenable GRAS now that it works.
4241 -- Arnaud Legrand <Arnaud.Legrand@imag.fr> Mon, 14 Feb 2005 14:02:13 -0800
4243 SimGrid (2.90) unstable; urgency=low
4245 Alpha 1 on the path to SimGrid 3
4247 * It is a long time since the last release of SimGrid. I'm sorry about
4248 that but as I had told you, I was rewriting a lot of things. I apologize
4249 to those who had been reporting bugs to me and that I had not answered.
4250 If your bug is still in the new version, please tell me. Here is a
4251 summary of the main changes.
4253 * REVOLUTION 1: The SimGrid project has merged with the GRAS project
4254 lead by Martin Quinson. As a consequence SimGrid gains a lot in
4255 portability, speed, and a lot more but you'll figure it out later.
4256 SimGrid now comprises 3 different projects: MSG, GRAS and SMPI.
4257 I wanted to release the new MSG as soon as possible and I have
4258 broken GRAS, which is the reason why, for now, only MSG is fully
4259 functional. A laconic description of these projects is available
4260 in the documentation.
4262 * REVOLUTION 2: I have removed SG and I am now using a new simulation
4263 kernel optimized for our needs (called SURF but only the developers
4264 should use it). Hence, MSG is now roughly 30 times faster and I think
4265 that by rewriting a little bit MSG, I could event speed it up a little
4266 bit more. Beside the gain in speed, it is also much easier to encode a
4267 new platform model with SURF than it was with SG. More to come...
4269 * REVOLUTION 3: I have tried to change a little as possible the API of
4270 MSG but a few things really had to disappear. The main differences
4271 with the previous version are:
4272 1) no more m_links_t and the corresponding functions. Platforms are
4273 directly read from an XML description and cannot be hard-coded
4274 anymore. The same format is used for application deployment
4275 description. The new format is described in the documentation.
4276 Have a look in tools/platform_generation. There is a tiny script
4277 that converts from the old platform format to the new one. Concerning
4278 the application deployment format, parsing the old one is tricky.
4279 I think most of you should however be able to convert your files. If
4280 it is really an issue, I can write a C code that does the conversion.
4282 2) the toolbox tbx does not exist anymore. We now have a library
4283 with much more data-structures but without the hash-tables (we have
4284 dictionaries that are much faster).
4286 -- Arnaud Legrand <Arnaud.Legrand@imag.fr> Mon, 31 Jan 2005 10:45:53 -0800
4288 *****************************************************************************
4289 * Follows the old GRAS changelog. It does not follow the same syntax, but I *
4290 * don't feel like converting the oldies. (Mt) *
4291 *****************************************************************************
4294 Version 2.90: "the long awaited one"
4295 - Finished rewriting and debugging MSG. Rewrote the documentation.
4296 - disable GRAS for now since it needs to be ported to the newest SG
4299 - Finish the port to windows (using mingw32 for cross-compile)
4302 - Main loop and datastructures of SURF. A cpu resource object is
4303 functional. Surf can thus be used to create cpu's with variable
4304 performance on which you can execute some actions.
4306 2004-11-15 Martin Quinson
4307 - Port to ARM. Simply added the alignment and size descriptions. Should
4308 work, but the ARM machines are so slow that I didn't had the opportunity
4309 to 'make check' over there yet.
4311 2004-11-15 Arnaud Legrand
4312 - Trace manager now written. It uses a heap structure and is therefore
4313 expected to be efficient. It may however be speeded up (particularly
4314 when many events occur at the same date) by using red and black
4315 trees. One day maybe...
4316 - Max-min linear system solver written. It uses a sparse matrix
4317 structure taking advantage of its expected use. Most operations are
4318 O(1) and free/calloc are called as few as possible. The computation of
4319 the minimum could however be improved by using a red and black tree
4322 2004-11-03 Arnaud Legrand
4323 - Rename every gras_* function that was in xbt/ to its xbt_
4325 - Add a heap and a doubly-linked list to xbt
4326 - Added a dichotomy to the dictionaries. make check works as well before
4327 so I assume that the patch is correct. I do not know however if things
4328 run effectively faster than before now. :)
4330 Inclusion of the SimGrid tree in the GRAS one. The archive is renamed to
4331 SimGrid, and the version number is bumped to 2.x
4333 2004-10-29 Martin Quinson
4334 - Introduction of the remote errors.
4335 They are the result of a RMI/RPC on the remote machine.
4336 ErrCodes being scalar values, you can't get the host on which those
4337 errors did happen. Extending the error mechanism as in Gnome is possible.
4338 No idea yet whether it is a good idea.
4340 2004-10-28 Martin Quinson
4341 - Interface revolution: the Starred Structure Eradication.
4342 I used to do typedef struct {} toto_t; and then handle *toto_t.
4343 Arnaud (and Oli) didn't like it, and I surrendered. Now, you have:
4344 - ???_t is a valid type (builded with typedef)
4345 - s_toto_t is a structure (access to fields with .)
4346 - s_toto is a structure needing 'struct' keyword to be used
4347 - e_toto_t is an enum
4348 - toto_t is an 'object' (struct*)
4350 typedef struct s_toto {} s_toto_t, *toto_t;
4351 typedef enum {} e_toto_t;
4352 Moreover, only toto_t (and e_toto_t) are public. The rest (mainly
4353 s_toto_t) is private.
4355 - While I was at it, all gras_<obj>_free() functions want a gras_<obj>_t*
4356 so that it can set the variable to NULL. It was so for dicts and sets,
4357 it changed for dynars.
4359 - Fix a bunch of memleaks in dict_remove
4360 - Fix a bug in sg/server_socket opening: it failed all the time.
4362 2004-10-07 Martin Quinson
4363 - Speed up dynar lookup operation a bit.
4365 gras_dynar_get is dead.
4367 Now, you can choose between gras_dynar_get_cpy (the old gras_dynar_get
4368 but should be avoided for efficiency reasons) and gras_dynar_get_ptr
4369 (which gives you the address of the stored data).
4371 gras_dynar_get_as is an helpful macro which allows you to retrieve a
4372 copy of the data using an affectation to do the job and not a memcpy.
4374 int toto = gras_dynar_get_as(dyn,0,int); rewrites itself to
4375 int toto = *(int*)gras_dynar_get_ptr(dyn,0);
4377 It does not really speedup the dynar test because they are
4378 setting elements all the time (and look them seldom). But the dict does
4379 far more lookup than setting.
4381 So, this brings the dict_crash test from ~33s to ~25s (200000 elms).
4383 2004-10-05 Martin Quinson
4384 - Allow to (en/dis)able the cycle detection at run time.
4386 Whether we should check for cycle or not is now a property of each
4387 datatype. When you think there may be some cycle, use datadesc_cycle_set.
4388 datadesc_cycle_unset allow to remove this property when previously set.
4390 Note that the cycle detection is off by default since it impacts the
4391 performance. Watch the data you feed GRAS with ;)
4393 This property is hereditary. Any element embedded in a structure having it
4394 set have it set for the time of this data exchange.
4396 You should set it both on sender and receiver side. If you don't set it on
4397 sender side, it will enter an endless loop. If you forget on receiver
4398 side, the cycles won't be recreated after communication.
4400 - Header reorganization.
4401 Kill gras_private.h, each submodule must load the headers it needs.
4403 2004-10-04 Martin Quinson
4404 - Interface revolution: do not try to survive to malloc failure.
4406 Now, gras_malloc and friends call gras_abort() on failure.
4407 As a conclusion, malloc_error is not a valid error anymore, and all
4408 functions for which it was the only gras_error_t return value are
4409 changed. They now return void, or there result directly.
4410 This simplify the API a lot.
4412 2004-09-29 Martin Quinson
4413 - Re-enable raw sockets.
4414 Created by gras_socket_{client,server}_ext;
4415 Used with gras_raw_{send,recv}
4418 It should allow to kill the last bits of gras first version soon.
4420 This is not completely satisfactory yet (duplicate code with
4421 chunk_{send,recv}; a bit out of the plugin mechanism), but it should
4424 - Simplify transport plugin (internal) interface by not passing any
4425 argument to _server and _client, but embedding them in the socket
4428 2004-09-28 Martin Quinson
4429 - Finish the port to AIX.
4430 autoconf was my problem (segfault within the malloc replacement
4431 function. No idea why)
4433 2004-09-16 Martin Quinson
4434 - Fix some size_t madness on 64bit architectures.
4436 2004-09-08 Martin Quinson
4437 - Reduce the number of system headers loaded, overload some more system
4438 calls (such as malloc to cast the result of the system one, and work
4440 - Fix and reintroduce the config support
4442 2004-09-07 Martin Quinson
4443 - Source code reorganization to allow Arnaud to surf all over there.
4444 - Allow to document the logging categories.
4445 - Remove all uppercase from logging categories and useless cleanup in names.
4447 2004-08-18 Martin Quinson
4448 Version 0.6.2 (protocol not changed; API changed)
4449 - Interface cleanup: gras_msgtype_by_name returns the type (instead of a
4450 gras_error_t), and NULL when not found. Functions expecting a msgtype
4451 as argument (msg_wait; msg_send) deal with NULL argument by providing a
4452 hopefully usefull message.
4453 - Portability to prehistoric sparcs again
4455 2004-08-17 Martin Quinson
4456 Version 0.6.1 (protocol not changed; ABI not changed)
4457 - prealloc some buffers to speed things up
4459 2004-08-11 Martin Quinson
4460 Version 0.6 (protocol not changed; ABI expended)
4461 - The parsing macro can deal with the references, provided that you add
4462 the relevant annotations (using GRAS_ANNOTE(size,field_name))
4464 2004-08-09 Martin Quinson
4465 Version 0.5 (protocol not changed; ABI changed)
4466 - Allow to off turn the cycle detection code in data exchange at
4467 compilation time. It should be at run time, but I'm short of time (and
4468 the config stuff is still broken). That way, we keep dict out of the
4469 critical path, which is good because the performance is poor:
4470 - search not dichotomial yet
4471 - dynar give no way to access their content and memcpy everytime
4472 - In composed data description (struct, ref and so on), stop foolness of
4473 keeping the subtype's ID, but store the type itself. This keeps sets out
4474 of the critical path, which is good since they rely on dynar and
4475 dictionaries. The only loose of that is that we cannot detect the
4476 redeclaration of a structure/union with another content (but I'm not sure
4477 the code detected well this error before anyway). We still can detect
4478 the redefinition discrepancy for the other types.
4479 - Use a whole bunch of optimisation flags (plus -fno-strict-aliasing since
4480 it breaks the code because of type-punning used all over the place).
4481 This breaks on all non-gcc architectures (for now).
4483 All those changes (plus the buffer of last time) allow me to gain 2 order
4484 of magnitude on cruel tests consisting of 800000 array of integers on two
4485 level of a hierarchical structure (200 secondes -> 4 secondes)
4488 - the selector of reference must now return the type it points to, not
4489 the ID of this type.
4491 2004-08-06 Martin Quinson
4492 Version 0.4 (protocol changed; ABI not changed)
4493 - Allow to pass --gras-log argument to processes in simulation mode. Really.
4494 - New debugging level: trace (under debug) to see effect of GRAS_IN/OUT
4495 - Implement a buffer transport, and use it by default (it relies on tcp in
4496 real life and on sg in simulation).
4497 That's a bit hackish since I had a new field to the structure to store
4498 its data without interfering with the subtype ones. Inheritance
4499 is tricky in C. And that's a kind of reverse inheritance with one class
4500 derivating two classes. Or maybe a game with java interfaces. Anyway,
4501 that's damn hard in C (at least).
4502 Moreover, I got tired while trying to ensure plugin separation and
4503 genericity in SG mode. MSG wants me to do weird things, so let's go for
4504 cruel hacks (temporarily of course ;).
4505 See comment in transport_private.h:71
4506 - do not include all the _interface headers in private but in the files
4507 which really need them (to cut the compilation time when they are
4510 2004-07-26 Martin Quinson
4511 Version 0.3 (protocol not changed; ABI changed)
4512 - Major overhault of the datadesc interface to simplify it:
4513 - shorted the function names:
4514 s/gras_datadesc_declare_struct/gras_datadesc_struct/ and so on
4515 - add a trivial way to push/pop integers into the cbps without malloc.
4516 This allows to make really generic sub_type description, which simply
4517 pop their size of the stack.
4518 - add a function gras_datadesc_ref_pop_arr() which does what users want
4519 most of the time: Declare a dynamic array (which pops its size of the
4520 stack) and declare a reference to it. Poor name, but anyway.
4521 - kill the post-send callback, add a post-receive one
4523 2004-07-23 Martin Quinson
4524 Version 0.2 (protocol changed; ABI changed)
4525 - add some testing for cpbs in the test cases, and fix some more bugs.
4526 This invalidate again the little64 data file, since I cannot regenerate
4528 - remove an awfull optimization in the logging stuff, allowing me to:
4529 - understand it again
4530 - learn gcc how to check that the argument match the provided format
4531 - fix all errors revealed by gcc after that
4532 - internal keys of dict are not \0 terminated. Deal with it properly in
4533 loggings instead of segfaulting when the user want to see the logs :-/
4535 2004-07-22 Martin Quinson
4536 - Fix some stupid bug preventing cbps (callback postit) from working
4538 2004-07-21 Martin Quinson
4539 - Some documentation cleanups
4540 - remove the useless last argument of msgtype_declare
4541 - rename the Virtu functions to fit into the 'os' namespace
4542 - move headers src/include -> src/include/gras/ and stop fooling with
4543 gras -> . symbolic link
4544 - make distcheck is now successful
4546 2004-07-19 Martin Quinson
4548 - Build shared library also
4549 - Install html doc to the right location
4550 - stop removing maintainer files in make clean
4551 - build tests only on make check
4553 2004-07-13 Martin Quinson
4555 - No major issue in previous version => change versioning schema
4556 - Re-enable little64 convertion test now that Abdou kindly regenerated the
4557 corresponding dataset.
4559 2004-07-11 Martin Quinson
4561 - Get it working with any kind of structure (we can compute the padding
4562 bytes remotely for all the architectures I have access to)
4563 - Implement the structure parsing macro (still not quite robust/complete)
4564 - Improvement to the remote testing toysuite
4566 2004-07-10 Martin Quinson
4567 [autoconf mechanism]
4568 - get ride of a bunch of deprecated macros
4569 - actually run the test for two-compliment, not only compile it :-/
4570 - test whether the structures get packed (and bail out if yes. Damn.
4571 Alignment is a serious matter)
4572 - test whether the structures get compacted (but respecting the alignment
4573 constraints of each types)
4574 - test whether the array fields of structures can straddle alignment boundaries
4576 - Damnit, double are bigger than float (typo in creation of 'double' datadesc)
4577 (took me 2 hours to find that bug, looking at the wrong place)
4578 - Add gras_datadesc_declare_{union,struct}_close(). They must be used
4579 before sending/receiving and are used to compute the offsets of fields
4580 - Given that padding size depend even on compiler options, keep track of
4581 alignment and aligned_size only for the current architecture. Not a big
4582 deal since we send structure fields one after the other (seems
4584 - Add the datastructure used for IEEE paper by the PBIO guys to the test
4585 program, let it work on linux/gcc/little32. portability todo.
4587 2004-07-08 Martin Quinson
4588 - import and improve remote compilation support from FAST
4589 - make sure make check works on half a dozen of machines out there
4591 2004-07-07 Martin Quinson
4592 Let's say it's version 0.0.3 ;)
4593 - Implement conversions (yuhu!)
4594 - Let it work on solaris (beside conversion, of course)
4595 - Stupid me, using rand() to generate the conversion datatests in not wise.
4597 2004-07-06 Martin Quinson
4598 - Let make dist work, since I'm gonna need it to compile on remote hosts
4599 - Let Tests/datadesc_usage write the architecture on which the file was
4600 generated as first byte.
4601 - Add PowerPC (being also IRIX64), SPARC (also power4) and ALPHA
4602 architecture descriptions.
4603 - Add datadesc_usage.{i386,ppc,sparc} files being the result of execution
4604 on those architectures.
4605 - Optimization: send/recv array of scalar in one shoot
4607 2004-07-05 Martin Quinson
4608 - YEAH! GRAS/SG and GRAS/RL are both able to run the ping example !
4610 - Plug a whole bunch of memleaks
4611 - each process now have to call gras_{init,exit}. One day, their log
4612 settings will be separated
4613 - Continue the code factorisation between SG, RL and common in Transport.
4615 2004-07-04 Martin Quinson
4617 - Redistribution between SG and RL.
4618 We wanna have to accept in SG, so move accepted related parts of RL in
4619 the common part. (more precisely, the dynar of all known sockets is no
4620 more a static in transport.c, but part of the process_data)
4622 [gras_stub_generator]
4623 - Bug fix: Do call gras_process_init from gras_init (wasnt called in RL).
4625 2004-07-03 Martin Quinson
4626 - Create a new log channel tbx containing dict, set, log, dynar (to shut
4627 them all up in one shot)
4629 - Fix the ugly case of reference to dynamic array.
4630 - New (semi-public) function gras_datadesc_size to allow the messaging
4631 layer to malloc the needed space for the buffer.
4633 - gras_socket_close now expect the socket to close (and not its address to
4634 put NULL in it after it). This is because the socket passed to handlers
4635 is one of their argument (=> not writable).
4637 - propagate the interface cleanup from last week in datadesc, ie remove a
4638 superfluous level of indirection. User pass adress of variable
4639 containing data (both when sending and receiving), and not of a variable
4640 being a pointer to the data. Let's say that I like it better ;)
4641 The price for that is constructs like "int msg=*(int*)payload" in
4642 handlers, but it's a fine price, IMHO.
4644 - Let it work in RL (yuhu)
4646 2004-06-21 Martin Quinson
4648 - porting SG plugin and SG select to new standards (works almost).
4649 - plug memleaks and fix bugs around.
4652 - cleanup the prototype of data recv and force users to specify when they
4653 want to handle references to objects. Test case working even for cycles.
4654 - plug memleaks. Valgrind is perfectly ok with this.
4656 2004-06-12 Martin Quinson
4658 - cleanup the separation between plugin and main code in plugin creation
4660 2004-06-11 Martin Quinson
4662 - Reput hook for raw sockets, needed for BW experiments
4663 - kill a few lines of dead code
4664 [Data description] Interface cleanup
4665 - gras_datadesc_by_name returns the searched type or NULL.
4666 That way, no variable is needed to use a type desc once, which makes
4668 - gras_datadesc_declare_[struct|union]_append_name is removed. The last
4669 two parameters were strings (field name, type name), leading to
4671 [Dicos] Interface cleanup
4672 - gras_dico_retrieve -> gras_dico_get ; gras_dico_insert -> gras_dico_set
4673 This is consistant with the dynar API.
4675 2004-04-21 Martin Quinson
4677 - Porting to new standards.
4679 - interface cleanup.
4680 There is no bag anymore, no need to take extra provision to mask the
4681 pointers behind "ID".
4682 Better splitup of functions between files create/exchange/convert.
4683 This is still a bit artificial since convert and receive are so
4684 interleaved, but anyway.
4686 - add a queued message list to procdata (the ones not matching criteria
4688 - factorize some more code between SG and RL wrt procdata
4690 - use gras_exit in example to track memleaks
4691 - get rid of gs_example now that GS is properly integrated into gras
4692 - update run_test to integrate the latest tests (datadesc)
4694 - rename WARNINGn macros to WARNn since it prooved error-prone
4696 2004-04-19 Martin Quinson
4698 - register init/exit functions within gras module mechanism
4699 - send/receive function.
4700 Convertion is not implemented, but short-cutted if not needed.
4701 struct/array elements are sent one by one (instead of block-wise), but
4702 nobody really cares (yet). Get a prototype before optimizing.
4703 - tests (using a file socket) for DD send/receive on:
4704 - base types: int, float
4705 - array: fixed size, string (ie ref to dynamic string)
4706 - structure: homogeneous, heterogeneous
4707 - chained list, graph with cycle
4708 Believe it or not, valgrind is not too unhappy with the results. The
4709 cycle happily segfaults, but the others are ok. And I'm sick of pointers
4713 - Bugfix when using a filename explicitly (instead of '-')
4715 2004-04-09 Martin Quinson
4717 - factorize more code between RL and SG in socket creation
4718 - Complete the implementation and tests of:
4720 o file (only in RL, and mainly for debugging)
4722 I lost 3 days to design a portable address resolver, and then decided
4723 that the prototype mainly have to run on my box.
4724 Addressing portability too early may be like optimizing too early :-/
4726 - use gras_init in the Tests instead of the crappy parse_log_opt
4727 (the latter function is removed)
4728 [Conditional execution]
4729 - New functions: gras_if_RL/gras_if_SG (basic support for this)
4730 [Code reorganisation]
4731 - Get rid of libgrasutils.a since it makes more trouble than it solves.
4732 Build examples against the RL library, since there is no way to disable
4733 its creation for now.
4735 For information, the beginning of coding on GRAS was back in june
4736 2003. I guess that every line has been rewritten at least twice since