1 SimGrid (3.23) NOT RELEASED (Release Target: June 21. 2019, 15:54 UTC)
7 - #326: Valgrind-detected error for join() when energy plugin is activated
9 ----------------------------------------------------------------------------
11 SimGrid (3.22) April 1. 2019
13 The Easter Chrismas Release (this one is somewhat late).
16 - We are excited to introduce the SimGrid/S4U interface to your neighborhood
17 - Not complete yet: asynchronous activities (amongst others) are still missing
18 - Still ongoing: the interface may change in the future. We need more
19 testers! Please report any glitches.
20 - No new project using Java should start now. Please switch to Python.
23 - Some of the internal cleanups may lead to speed improvements:
24 - The hard limitation on the amount of simulated actors with
25 Java+Mac was removed. Now, the available memory is the only limit.
26 - Our refcounting was tidyied, leading to 10% speedups in some cases.
27 - We are still working on making our code robust to the actor kills
28 and hosts' churn. Things are improving, but it's not perfect yet.
29 - Replaced our own code to display a backtrace (that was forking addr2line)
30 with the Boost.Stacktrace library.
31 You won't see your backtraces without this optional dependency.
32 - Bump cmake dependency to 3.5 (provided by Ubuntu 16.04).
33 - Stop setting random seed with srand() at initialization.
36 - In <host> and <peer>, 'availability_file' is now 'speed_file'.
37 XML file version remains 4.2 since old files are still compatible.
40 - Process termination which was broken at version 3.21 has been repaired.
41 - Expose host load plugin: loadInit, getCurrentLoad, getComputedFlops, getAvgLoad
42 - Hide the examples into examples/deprecated. New users should use Python.
45 - Drop MSG_process_create_from_stdfunc() from the API.
46 This C++ function was a pimple in the C API, made necessary at some
47 point by the Java bindings. This is fixed now.
48 - Hide the examples into examples/deprecated. New users should use S4U.
49 - MSG_process_create and MSG_process_attach now crash if the host used
50 to run this process is off.
51 - Fix the protype of MSG_process_on_exit()
52 Now use (int,void*) callbacks instead of (void*,void*) ones.
53 The implementation was ways too messy to actually work, I guess.
56 - Change the way SMPI_SAMPLE_* macros work to avoid invalidating cache
57 too often and provide more accurate timings.
58 - Add -gdb, -lldb, and -vgdb shortcuts to help debug MPI codes with smpirun
59 - MPI_Alltoallw support
60 - Partial MPI nonblocking collectives implementation: MPI_Ibcast, MPI_Ibarrier,
61 MPI_Iallgather, MPI_Iallgatherv, MPI_Ialltoall, MPI_Ialltoallv, MPI_Igather,
62 MPI_Igatherv, MPI_Iscatter, MPI_Iscatterv, MPI_Ialltoallw.
63 - MPI_Request_get_status, MPI_Status_set_cancelled, MPI_Status_set_elements
65 - Basic implementation of generalized requests (SMPI doesn't
66 allow MPI_THREAD_MULTIPLE) : MPI_Grequest_complete, MPI_Grequest_start
69 - Drop sg_cmdline. Please use xbt_cmdline instead.
70 - Drop the C xbt_os_mutex_t; Use the C++11 std::mutex.
71 - Drop the C xbt_os_sem_t; Use the C++ xbt::OsSemaphore.
72 OsSemaphore is implemented in a portable way with C++11 threads.
73 This should allow much more threads to be created at the same time,
74 allowing Mac and Java users to simulate many more actors.
75 - Implement the 'thread' factory with std::thread instead of xbt ones.
76 It is not possible to set the stack size with threads anymore, but
77 -fsplit-stack is the way to go nowadays when using threads.
78 - Drop the xbt_os_thread_t module (now unused)
79 - Drop xbt_ex_display(), use simgrid::xbt::log_exception() instead.
80 - Drop xbt_str_join_array().
81 - Drop cunit, use Catch2 instead.
84 - Many cleanups in the kernel::activity namespace. This was long
85 overdue, and shall open the path to many future endeavors.
88 - #132: Java: a process can not shut down its own host
89 - #220: S4U: detached send causes exception if sender terminates soon after sending
90 - #261: Document the parameters of parallel execution's constructor
91 - #300: [s4u] BarrierPtr is missing
92 - #314: SMPI args internal cleanup
93 - #316: Fix a bug related to the CPU utilization of multi-core VM
94 - #318: Invalid trace file when using option --cfg=tracing/smpi/display-sizes:yes
95 - #324: S4U: Attempting to create an actor on turned off host segfaults instead of throwing
96 - #325: Turning off a host has different behavior on sleeping actors and computing actors
98 ----------------------------------------------------------------------------
100 SimGrid (3.21) October 3. 2018
102 The Restarting Documentation (TRD) Release.
105 - Convert the user manual to Sphinx for improved usability.
106 Unstable version now hosted on https://simgrid.frama.io/simgrid
107 Many glitches remain; stay tuned.
108 - Restrict the Doxygen reference API to the installed header files.
109 (documenting all internals this way is overkill + doxygen scales badly)
110 - New tutorial on S4U (highly inspired from the old MSG one, but with
111 a git repository to fork as a starting point, and a docker image)
112 - Started but not finished a SMPI tutorial inspired from the JLPC'14 one.
113 - The Developper manual is still to be converted (not compiled until then)
114 - Some parts are still missing in this conversion (such as the
115 platform and deployment sections) while others were blindly converted
116 and would need more love (such as the configuration flags).
117 Things will certainly further improve in the future releases.
120 - Fully reimplement auto_restart mechanism that was utterly broken
121 (fix #22, #131 and #281 that were all very related)
122 - Implement semaphores (fix #303 and #291)
123 - When creating an actor from a function and its parameters,
124 move-only parameters are not allowed anymore, as it would prevent
125 the actor to be restartable if its parameters are consumed on run.
126 - s4u::Io: IOs go asynchronous as activities. New methods in s4u::Storage:
127 - io_init(sg_size_t, s4u::Io::OpType) to create a READ or WRITE asynchronous
128 IO operations that can be started, waited for, or canceled as a regular
130 - read_async(sg_size_t) and write_async(sg_size_t) which are wrappers on
134 - Rename 'power' and 'power_used' variables into 'speed' and 'speed_used'
135 - New host variable: 'core_count'
138 - Remove xbt_os_thread_specific features
139 - Remove portability wrapper to condition variables
140 - Remove xbt_os_thread_yield()
143 - MPICH collective selector now mimics MPICH 3.3b
144 - OpenMPI collective selector now mimics OpenMPI 3.1.2 (default "tuned" setting)
145 - MPI_Init(NULL,NULL) is now allowed
146 - smpi/wtime option now injects time in gettimeofday or clock_gettime calls
147 - Command-line arguments should now be handled properly in Fortran simulations
148 - MPI Attributes and related callbacks should work in Fortran
149 - Apps using C + Fortran should now work
150 - MPI_* calls now check for non MPI_SUCCESS return values and emit warnings
151 - Support MPI_Error_String
154 - Due to an internal bug, Msg.run() must now be your last line.
155 We hope to fix it in a future release, and we are sorry for the inconvenience.
158 - #22: Process autorestart seem to only work with CAS01 cpus
159 - #56: Feature request: dynamic SMPI replay
160 - #93: simgrid should not eat --help
161 - #111: How to change the loopback link characteristics?
162 - #116: Platform cluster radical
163 - #117: Platform cluster/host order
164 - #129: Replay_multiple on steroid
165 - #131: Java : autostart does not work
166 - #143: Setting a breakpoint at a given time
167 - #235: Network energy models should be integrated
168 - #264: Add ptask L07 resource tracing
169 - #271: Dynamic and manual replay of SMPI traces
170 - #279: Breakpoints option uses time deltas instead of absolute time
171 - #281: Daemonized actor no longer daemonized after an auto-restart
172 - #282: TIT convertor erase traces when using absolute path in the trace list file
173 - #285: segfault when a s4u actor kills itself with msg process tracing activated
174 - #286: Pajé traces are not exposing the number of cores
175 - #287: Command-line parsing should stop when encountering '--'
176 - #288: MPI_Init(NULL, NULL)
177 - #289: Improve documentation of Actor::on_destruction and this_actor::on_exit()
178 - #290: Method to check if a mailbox has a message ready to be consumed
179 - #291: [s4u] semaphores do not seem available yet
180 - #294: Alltoall collective implementation of mpich
181 - #295: Starting a Host as OFF is not supported
182 - #296: DTD too permissive
183 - #299: Add a s4u barrier example
185 ----------------------------------------------------------------------------
187 SimGrid (3.20) Released June 24. 2018
189 The proxy snake_case() release.
192 - The whole API is now using snake_case() instead of mixing it with camelCase.
193 Compatibility wrappers in place for one year.
194 - We took the opportunity to increase the consistency of the API.
195 Please report any remaining glitches.
196 - New function simgrid::s4u::Host::get_actor_count:
197 Returns the number of actors running on a specific host.
200 - SMPI is now tested with ~45 proxy apps from various sources, with none or
201 only minor patching needed: check https://github.com/simgrid/SMPI-proxy-apps
202 - Replay: The replay file has been re-written in C++.
203 - Replay: Tags used for messages sent via MPI_Send / MPI_Recv are now
204 supported. They are stored in the trace and used when replayed.
205 - Basic support of MPI_Cancel. Robustness not guaranteed.
206 - Support of MPI_Win_allocate_shared, MPI_Win_shared_query, MPI_Comm_split_type
207 (only for MPI_COMM_TYPE_SHARED).
208 - New option: smpi/privatize-libs, to add external shared libs to be privatized
209 by SMPI. They will be copied locally and loaded separately by each process.
210 Example --cfg=smpi/privatize-libs:"libgfortran.so.3;libscalapack.so".
211 - Tracing: add tracing for MPI_Start, Startall, Testall, Testany
212 - Interception of getopt, getopt_long and getopt_long_only calls to avoid issues
213 with internal index optind with multiple processes. Only works if MPI_Init has
215 - Fortran: SMPI builds a mpi.mod file which should allow use of "use mpi"
216 syntax without preprocessing tricks.
219 - Change --cfg=tracing/msg/vm to --cfg=tracing/vm as virtual machine
220 behavior tracing is no longer limited to MSG
221 - TIT (Time Independent Traces): We finally support tags. Unfortunately,
222 this means that traces now need to be updated or re-obtained; both Irecv
223 and Isend lines in your traces have now in total 5 mandatory fields:
224 <rankid> <command> <to/from rankid> <tag> <size>
225 To update your traces, it suffices to add a 0 for the tag here.
226 - TIT now also supports waiting for a distinct request via MPI_Wait.
227 Wait/Test now wait for a specific request, not just the last one that was
228 issued. This unfortunately means another update, because we need to
229 identify which request you want to wait for. We do this via the
230 triplet (sender, receiver, tag), which needs to be added:
231 <rankid> <command> <sender> <receiver> <tag>
232 - Actions are now in lower case (e.g., "allReduce" becomes "allreduce").
233 New script simgrid_convert_TI_traces.py: upgrade your TI traces.
236 - The deprecation of MSG is ongoing (but this should not impact you).
237 Many MSG functions are now simple wrappers on the C API of S4U. If
238 you wish to convert your code to S4U, find the S4U counterparts of
239 your MSG calls in src/msg/msg_legacy.cpp.
240 - MSG can still be used, but won't evolve anymore.
243 - Allow to run the Link energy plugin from the command line with
244 --cfg=plugin:link_energy
245 - Rename Energy plugin into host_energy
246 - Rename Load plugin into host_load
249 - Add parameter --cfg=simix/breakpoint to raise a SIGTRAP at given time.
250 - kill simix::onDeadlock() that was somewhat dupplicating s4u::on_deadlock()
251 - Improve performance when handling timeouts of simix synchros.
254 - Config: the C API is now deprecated (will be removed in 3.23), and
255 the C++ API has been slightly improved.
258 - Fix several build issues on OSX.
259 - Move simgrid_config.h to simgrid/config.h (old header still working)
262 - #143: Setting a breakpoint at a given time
263 - #150: Inconsistent event names in SMPI replay
264 - #258: daemonized actors hang after all non-daemonized actors have completed
265 - #267: Linker error on unit_tmgr
266 - #269: SMPI: tracing of MPI_Wait/all/any broken
267 - SMPI: Fix various crashes with combined use of MPI_PROC_NULL and MPI_IGNORE_STATUS
269 ----------------------------------------------------------------------------
271 SimGrid (3.19.1) Released March 22 2018
273 The Fixed ABI Release.
275 As you may know, we are currently refactoring SimGrid in deep.
276 Upcoming SimGrid4 will be really different from SimGrid3: modular,
277 standard and extensible vs. layered, homegrown and rigid. C++ vs. C.
279 Our goal is to smooth this transition, with backward compatibility
280 and automatic update paths, while still progressing toward SimGrid4.
282 SimGrid remains open during works: The last pure SimGrid3 release was
283 v3.12 while all subsequent versions are usable alpha versions of
284 SimGrid4: Existing interfaces remain unchanged, but the new S4U
285 interface is budding and the internals are deeply reorganized.
287 Since 2015, we work hard to reduce the changes to public APIs. When
288 we need to rename a public library symbol in S4U, we let your
289 compiler issue an explicative warning when you use the deprecated
290 function. These messages remain for four releases, i.e. for one full
291 year, before turning into an error. Starting with v3.15, your can
292 also adapt to API changes with the SIMGRID_VERSION macro, that is
293 defined to 31500 for v3.15, to 31901 for v3.19.1 and so on.
295 Starting with this v3.19.1, our commitment to reduce the changes to
296 the public interfaces is extended from the API to the ABI: a program
297 using only MSG or SimDag and compiled against a given version of
298 simgrid can probably be used with a later version of SimGrid without
299 recompilation. We will do our best... but don't expect too much of
300 it, that's a really difficult goal during such profund refactoring.
302 The difference between v3.19 and v3.19.1 is that the former was
303 accidentally breaking the ABI of MSG, while the later is restoring
306 S4U and kernel APIs will still evolve until SimGrid4, with one-year
307 deprecation warnings as currently. In fact, cleaning up these
308 interfaces and converting them to snake_case() is one release goal of
309 v3.20. But don't worry, we are working to smooth this upgrade path.
311 In summary, new projects should start with S4U to benefit of the
312 future, but old MSG projects should still be usable with no change.
314 ----------------------------------------------------------------------------
316 SimGrid (3.19) Released March 20 2018
318 The Moscovitly-cold Spring release.
320 SMPI user-visible improvements:
321 - Support of MPI_Type_create_subarray
322 - Unimplemented MPI calls now abort (instead of issuing a warning)
323 Some harmless calls around errhandlers still only issue a warning.
324 - MPI_Sendrecv was behaving badly when MPI_PROC_NULL was sender or receiver.
325 - Starting MPI ranks (or even MSG/S4U actors) once the simulation started
326 is now possible (mmap privatization was refactored to this end).
327 Adding new SMPI instances should also be technically doable now.
329 SMPI internal cleanups:
330 - Removed index notion from SMPI -- no more "getPid() - 1"!
331 In tracing files, actors are called rank-<PROCESS-ID> but these are
332 NOT the real ranks (tracing several communicators is not supported yet).
333 - Deprecate smpi_process_index() (will be removed in 3.22)
334 - Better testing on classical proxy apps, through an external project:
335 https://github.com/simgrid/SMPI-proxy-apps/
338 - Use a graphical TOC to make it easier to find the documentation you need
339 - Revamp the MSG tutorial
342 - Fix MSG_task_get_remaining_work_ratio(): return 1.0 for unstarted tasks.
343 - Remove parameter of MSG_process_killall().
344 Resetting the PID was bogus anyway (several actors could have the same PID).
347 - Execution->setHost() can be called after start(), to migrate it.
348 - Comm::test_any() is now implemented.
349 - s4u::Actor now has onCreation() and onDestruction() signals.
350 - Install some kernel header files for the users' plugins and more.
351 Warning, their API is really not stable yet.
352 include/simgrid/kernel/resource/{Action,Resource,Model}.hpp
353 include/simgrid/kernel/routing/*Zone.hpp
356 - SD_task_dependency_add(): remove unused parameters 'name' and 'data'.
358 Build System and other cleanups:
359 - Remove unused run-time parameter "tracing/onelink-only".
360 - SimGrid now works with intel compilers (MC still buggy)
361 - Remove XBT_LOG_CONNECT, it should be useless nowadays.
362 - tesh kills subprocesses on timeout (but not on windows)
365 - Rename FULLDUPLEX into SPLITDUPLEX (old name still accepted)
368 - #194: Feature request: simgrid::s4u::Comm::test_any()
369 - #245: migrating an actor does not migrate its execution
370 - #253: Feature Request: expose clusters as objects
371 - #254: Something seems wrong with s4u::Actor::kill(aid_t)
372 - #255: Tesh broken on Windows
373 - #256: Modernize FindSimGrid.cmake
374 - #257: Fix (ab)use of CMake install
376 ----------------------------------------------------------------------------
378 SimGrid (3.18) Released December 24 2017
380 The "Ho Ho Ho! SimGrid 4 beta is coming to town" release.
382 MSG IS NOW DEPRECATED. Please use S4U for new projects.
383 - Support for MSG should not be removed from SimGrid before 2020,
384 but future evolutions will be limited to the integration of
385 user-provided patches.
388 - s4u::onDeadlock() signal, run before stopping the simulation.
389 - s4u::Exec: asynchronous executions (abstraction of background
391 - s4u::Host->getLoad() returns the achieved speed in flops/s
394 - Link::name() is deprecated and will be removed in v3.21, use
395 Link::getCname() instead.
396 - Mailbox::getName() changed to return a std::string, use
397 Mailbox::getCname() instead to get a char*.
398 - Storage::getName() changed to return a std::string, use
399 Storage::getCname() instead to get a char*.
400 - s4u::allStorages() becomes s4u::getStorageList(whereTo)
401 to have both allocation and deallocation of the map in user space.
404 - Forbid the use of MSG_task_get_flops_amount() on parallel tasks:
405 The amount of flops remaining to do is a vector, not a scalar.
406 - Introduce MSG_task_get_remaining_work_ratio(), which does what its
407 name implies on both sequential and parallel tasks.
408 - Both changes fix GitHub's #223 using PR #237 as a basis.
409 Thanks Michael Mercier.
410 - Most examples were converted to S4U and hidden elsewhere at tests.
411 Rationale: we still want MSG to work; we want newcomers to use S4U.
414 - LMM stuff moved to its own namespace: simgrid::kernel::lmm.
415 - Renamed LMM classes (e.g. s_lmm_system_t -> System).
418 - Switch to the faster dlopen privatization mechanism by default
419 - Documentation improvments
422 - Live migration is getting moved to a plugin. Dirty page tracking is
423 the first part of this plugin. This imply that VM migration is now
424 only possible if one this function is called:
425 - C/MSG: MSG_vm_live_migration_plugin_init()
426 - C/C++: sg_vm_live_migration_plugin_init()
427 - Java: Msg.liveMigrationInit()
428 For C and C++, "simgrid/plugins/live_migration.h" also has to be
432 - Define class simgrid::xbt::Path to manage file names.
433 - Removed unused functions:
434 - xbt/file.h: xbt_basename(), xbt_dirname(), xbt_getline()
435 - xbt/graph.h: xbt_graph_edge_get_length(), xbt_graph_edge_set_length,
436 xbt_graph_export_graphviz()
437 - xbt/str.h: xbt_str_join()
438 - Remove unused datatypes:
439 - xbt/heap.h: use std::priority_queue or boost::heap instead
440 - xbt/swag.h: use boost::intrusive::list instead
443 - New link_energy plugin for the consumption of the links.
444 - All of the operations on files and storage contents have been
445 packaged into a plugin (src/plugins/file_system). The current
446 public interface can be found in
447 include/simgrid/plugins/file_system.h
448 To use these functions you now have to initialize the plugin by
449 calling MSG_storage_file_system_init() just after calling
450 MSG_init() or sg_storage_file_system_init() just after creating
454 - Remove the undocumented/untested tag <include>
457 - Remove viva specific tracing as the tool is no longer maintained
460 - #248: Kill of finished processes leads to segfault
461 - #240: xbt_cond_wait_timeout should gracefully return for C apps
462 - #239: please implement signal s4u::onDeadlock()
463 - #230: segfaults when exit() without run()
464 - #225: s4u::Actor::kill() doesn not really kill victims in a join()
465 - #223: MSG_task_get_flops_amount() not working with parallel tasks
466 - #222: Actor::kill() doesn't really kill and segfaults
467 - #221: odd LMM warning when killing an actor
468 - #120: Memory leak when the processes are forcefully killed
470 ----------------------------------------------------------------------------
472 SimGrid (3.17) Released October 8 2017
474 The Drained Leaks release: (almost) no known leaks despite the tests.
476 Even very long simulations will preserve your memory: our testsuite
477 stresses SimGrid for over 45mn on fast machines for a coverage of
478 over 80%, and there is only one single known leak, of about 4kb.
482 - Comm.detach(): start and forget about asynchronous emission. A cleanup
483 handler may be given to free resources if the comm cannot be completed.
484 - this_actor::send(mailbox) is now mailbox->put()
485 - New: simgrid::s4u::Comm::wait_all()
486 - New: Host.execute() for remote executions.
489 - Unused option network/sender-gap is removed.
492 - Deprecate MSG_task_isend_with_matching(): This unused feature
493 really complicates our internals. Will be removed in v3.20.
496 - Improved context termination. It is now possible to free resources, even
497 when a process is forcibly killed.
498 - ContextBoost: add support for Boost versions above 1.61.
501 - Bring back run-time option --cfg=exception/cutpath to remove exception
503 - Removed unused functions:
504 - xbt/str.h: xbt_str_split_str(), xbt_str_subst(), xbt_str_ltrim(),
505 xbt_str_rtrim(), xbt_str_trim().
506 - xbt/xbt_os_thread.h: xbt_os_thread_cancel(), xbt_os_thread_detach().
509 - Removed header files obsolete since SimGrid 3.12:
510 msg/datatypes.h, msg/msg.h, simdag/datatypes.h, simdag/simdag.h.
512 - #3: SD_exit should be made optional
513 - #120: Memory leak when the processes are forcefully killed
514 - #159: Threading test regression in Actor refcounting
515 - #170: simgrid::s4u::Comm::wait_any() returns too many comms
516 - #185: simgrid::s4u::Engine::instance()->shutdown() segfaults
517 - #186: Actor::killAll() segfaults if some process is blocked on wait()
518 - #191: VM migration and pstate
519 - #192: Updating the energy consumptions of all hosts crashes with VMs
520 - #195: All actors have PID=0 in the logs
521 - #204: Sometimes segfault with thread contexts and mmap privatization
522 - #222: Actor::kill() doesn't really kill and segfaults
523 - #225: Actor::kill() doesn't really kill when victims are doing a join()
525 ----------------------------------------------------------------------------
527 SimGrid (3.16) Released June 22. 2017.
529 The Blooming Spring Release: developments are budding.
532 - FreeBSD: Disable SMPI mmap privatization, switch automatically to dlopen.
533 - Mac, BSD: dlopen+thread broken, switch automatically to raw contexts.
534 - Java JAR file should be finally fully working on Mac OSX too.
536 XML platforms: Switch to platform v4.1 format.
537 * This is (mainly) a backward compatible change: v4 are valid v4.1 files
538 - <zone> can be used as a synonym for the now deprecated <as>
539 - <zoneRoute> can be used as a synonym for the now deprecated <asroute>
540 - <bypassZoneRoute> an be used as a synonym for the now deprecated <bypassAsRoute>
541 - <actor> can be used as a synonym for the now deprecated <process>
542 - state_file and avail_file periodicity is now easier to express
543 (check the documentation) the old behavior should still work.
544 * Storage: not backward compatible, but it seems that nobody ever used it
545 - Remove attribute 'content_type' of <storage_type>: was never used
546 - Make attribute 'model' of <storage_type> optional: for future usage
547 - Remove Bconnection model property: was never (in)validated. Replaced by
548 the maximum of the read and write bandwidth as a resource constraint.
551 - New and Backwards Compatibility break:
552 SD_simulate_with_update (double how_long, xbt_dynar_t changed_tasks_dynar)
553 When one wants to get the list of tasks whose states have changed during a
554 simulation round, s/he has to allocate and free a dynar and use it as
555 argument to this function. The former SD_simulate (double how_long)
559 - Allow multicore VMs, with the correct sharing (unless you overcommit)
560 BUG: vCPU overcommitting still leads to buggy sharing, though. WIP.
563 - New function to update the consumption of all hosts at once.
564 - Fix the model for multi-core hosts, linear in the amount of busy
565 cores with an abnormality for pIdle (see paper).
566 BUG: Still not satisfactory for ptask on mono-cores.
569 - The netzone are now available from the MSG API.
570 The old names still work, but are now deprecated.
573 - New algorithm to privatize globals: dlopen, with dynamic loading tricks
574 - New option: smpi/keep-temps to not cleanup temp files
575 - New option: smpi/shared-malloc-blocksize . Relevant only when global shared
576 mallocs mode is used, allows to change the size of the fake file used
577 (default 1MB), to potentially limit the number of mappings for large runs.
578 - Support for sparse privatized malloc with SMPI_PARTIAL_SHARED_MALLOC()
579 - Fortran ifort and flang compilers support
580 - New RMA calls supported (experimental):
581 - MPI_Win_allocate, MPI_Win_create_dynamic, MPI_Win_attach
582 - MPI_Win_detach, MPI_Win_set_info, MPI_Win_get_info
583 - MPI_Win_lock_all, MPI_Win_unlock_all, MPI_Win_flush
584 - MPI_Win_flush_local, MPI_Win_flush_all, MPI_Win_flush_local_all
585 - MPI_Op_commutative, MPI_Fetch_and_Op, MPI_Compare_and_swap
586 - MPI_Rput, MPI_Rget, MPI_Raccumulate, MPI_Rget_accumulate
589 - New: this_actor::isMaestro() returns whether we are in kernel mode.
590 - Behind the scene, ActivityImpl are now automatically refcounted.
591 Removing this nasty bottleneck will greatly simplify our internals.
594 - Replay: New function xbt_replay_action_get():
595 Retrieve the function previously associated to an event type.
596 - DROPPED FUNCTION: xbt_str_varsubst()
597 - DROPPED MODULE: strbuff. We don't need it anymore.
598 - DROPPED MODULE: matrix. We don't need it anymore.
599 - DROPPED MODULE: lib. We don't need it anymore.
601 -- Thu Jun 22 22:48:12 CEST 2017 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
603 SimGrid (3.15) Released March 22. 2017
605 The Spring Release: continuous integration servers become green
606 We fixed even the transient bugs on all target architectures:
607 Linux (CentOS, Debian, Ubuntu, Fedora), Mac OSX (Mavericks, El Capitan)
608 Windows, FreeBSD, NetBSD.
610 - Rename NetCards to NetPoints.
611 This was intended to help NS3 users, but that's not a netcard.
612 That's a point in the routing algorithm, let's avoid wrong simplifications.
615 - New: MSG_process_yield(). Stop and yield to other processes.
616 - New: MSG_process_daemon(). Daemon processes are automatically killed
617 when the last non-daemon process terminates
618 - New: MSG_process_ref/unref(). Fiddle with the process refcounting.
619 - Renamed MSG_energy_plugin_init() -> MSG_host_energy_plugin_init()
620 to make room for the upcoming network energy plugin.
621 - Drop MSG_host_get_current_power_peak: duplicates MSG_host_get_speed
624 - Ensure that an actor can kill itself with Process::exit()
625 - Kill the obscure NativeException. Nobody want to survive the issues
626 it denotes, so use JniException that is a RuntimeException (not to
627 be caught explicitly).
628 - Partial bug fix in initialization. SimGrid flags on command line were
629 consumed at C level but stayed in the original Java String[] args.
630 This could mess users' args[i] if SG flags were not put at the end of
632 The SimGrid flags are now removed from the Java arguments. However,
633 the number of arguments REMAINS UNCHANGED. It is then UNSAFE to test
634 if args.length is greater than the number of YOUR OWN ARGUMENTS.
635 It might be if you have --log or --cfg flags in the command line.
636 - Fix numerous memleaks all around the place. In particular, around VMs.
640 - s4u::onPlatformCreated: right before the simulation starts
641 - s4u::onSimulationEnd: right after the main simulation loop
642 - s4u::onTimeAdvance: right after a clock change (time is discrete)
643 - s4u::Host::onSpeedChange: when the pstate is changed, or when an
644 event from the availability_file changes the avail speed.
645 - Links are now usable from s4u
646 - New: Engine::hostList() and Engine::hostCount(). Still clumsy.
647 - New: Actor::suspend(), Actor::resume(), and Actor::migrate(new_host)
648 - New examples: The conversion of MSG examples to S4U has begun
649 - Actors: create, kill, migration, and suspend
650 - Applications: master-worker and token-ring
651 - Action replay: communications and storage
652 - Drop Host::getPstateSpeedCurrent() which duplicates Host::speed()
655 - Backwards Compatibility breaks
656 - The SD_route_get_list and SD_route_get_size functions have been removed.
657 They are replaced by the unique
658 void sg_host_route(sg_host_t src, sg_host_t dst, xbt_dynar_t links)
659 The route from src to dst is built in the links dynar whose size can
660 be obtained with xbt_dynar_length.
661 - The SD_route_bandwidth and SD_route_latency functions have been replaced by
662 sg_host_route_bandwidth and sg_host_route_latency.
663 Macros ensure the backwards compatibility, but you should fix your code
666 - Major C++ rewrite ongoing (SMPI used to be C compiled in C++).
667 This can break codes using SMPI internals (from private.h instead of the public smpi.h).
668 - Bump our claim of support from MPI 1.1 to MPI 2.2.
669 We don't support 100% of it, but it should be enough. Contact us if not.
670 - MPI_Win_lock/unlock, MPI_Get_accumulate support added (as for all RMA, implementation is
671 naive and probably inaccurate)
672 - New algorithm for SMPI_SHARED_MALLOC: global, where all blocks are
673 mapped onto a unique small file using some system magic.
674 - Bugfix: smpirun was sometimes misusing hostfile when wrongly terminated
675 - Fortran: cleanups, fixes, support of user-added operations
676 - RMA: MPI_Accumulate are applied in correct order.
677 - RMA: MPI_Win_{complete/post} shouldn't miss messages anymore.
678 - Better support for MPI_IN_PLACE
679 - Support for MPI_Win attrs and keyvals.
680 - Support MPI_Comm_group_create, MPI_Type_size_x
681 - MPI ops should be properly applied to all allowed types
682 - Replace implementation of MPI_Bcast "scatter followed by rdb allgather"
683 algorithm by a non failing one from mpich.
686 - Kill the fifo data container: we don't use it anymore.
689 - A <cluster> can now be created with different speed values to represent pstates.
690 see examples/platforms/energy_cluster.xml for an example.
692 SimGrid (3.14.159) Released December 28. 2016
694 The previous release was only a crude approximation of a Pi release;
695 this one should be a bit better.
697 - Revert a last minute change that broke on Mac OSX.
698 - Fix the changelog and NEWS files.
699 - Improve the documentation, in particular of the routing module.
700 - Integrate some patches flying around in Debian.
702 SimGrid (3.14) Released December 24. 2016
705 * The whole documentation was reworked and reorganized. There is
706 still much room for improvement here, but we're on it.
709 * We now need python3 for our testing infrastructure.
710 * Model checking needs libevent
713 * Now works on FreeBSD
716 * Privatization now works on FreeBSD
718 * Privatization is now activated by default in smpirun
719 You can turn it off with -no-privatize if something goes wrong.
721 * Call-location tracing for SMPI.
722 You can add the exact location (filename / linenumber) of an MPI call to
723 your trace files and slow down or speed up the simulation between two
724 consecutive calls by using an adjustment file (see the documentation).
726 * Fixed computation of timings for MPI_Send, MPI_Recv & possibly also others
727 We've found a bug that prevented SMPI to account for MPI_Send, MPI_Recv
728 and others (in some cases) in a correct way. That is, the smpi/os, smpi/or
729 values were ignored in some cases. The timings of these functions can now
730 be significantly different.
732 * smpi/cpu-threshold:-1 should become smpi/simulate-computation:no
733 smpi/running-power is renamed to smpi/host-speed
735 * smpi/grow-injected-times option to enable or disable multiplication of the
736 timings injected in MPI_Iprobe, or MPI_Test. Enabled by default, which can
737 make simulation less precise (but also much faster).
739 * smpirun script should be (much) faster for large deployments.
741 * SMPI tracing: fixed issue with poor matching of send/receives.
743 * Replay: Fix broken waitall
745 New functions and features
746 * MSG_parallel_task_execute_with_timeout, to timeout computations.
748 Dropped / renamed functions and features
749 * msg_mailbox_t and associated functions. Use s4u::Mailbox instead.
750 - MSG_mailbox_is_empty() -> Mailbox::empty()
751 - MSG_mailbox_front() -> Mailbox::front()
752 - MSG_mailbox_get_by_alias() -> simgrid::s4u::Mailbox::byName(name)
753 - MSG_mailbox_get_task_ext() -> MSG_task_receive_ext()
754 - MSG_mailbox_get_task_ext_bounded -> MSG_task_receive_ext_bounded
755 - MSG_host_(get/set)_params -> MSG_vm_(get/set)_params
756 * Don't pass the free_f parameter to property related functions:
757 - MSG_host_set_property_value()
758 - MSG_as_router_set_property_value()
759 - MSG_storage_set_property_value()
760 * VM properties. Since msg_vm_t are msg_host_t, just use
761 MSG_host_get_property_value() and friends
762 * VM I/O related things:
763 - Ignored parameter of vm_create: core_nb, disk_path and disk_size.
764 - Unimplemented save/restore methods
765 * MSG_as_router_get_property_value() was redundant with
766 MSG_environment_as_get_property_value().
767 - Removed MSG_as_router_*propert*() functions
768 - Added MSG_environment_as_set_property_value() for consistency
769 * xbt heterogeneous dictionnaries (created with xbt_dict_new()).
770 Well, they are still there for now, but deprecated with a warning.
771 Please switch to xbt_dict_new_homogeneous() before this is removed
773 * Task affinity. Its intended behavior (that was very badly tested
774 and probably not really working) was deceiving what most users
775 would have hoped here.
776 * xbt_os_sem_get_value: unused internally, deprecated on OS X El Capitan
777 * Option network/coordinates is now useless and should be dropped.
780 * Added option storage/max_file_descriptors to allow more than 1024 files opened
783 * Added option maxmin/concurrency_limit to allow more than 100 processes per host
784 * Added Dragonfly topology support
787 * Add Exa- and Peta- units such as EiB, EB, Eib, Eb for size, and
788 EiBps, EBps, Eibps, Ebps for bandwidth.
789 They may become useful to some lucky ones.
792 * New functions: msg.Comm.waitAll() and msg.Comm.waitAny()
793 * ex/app_tokenring: new example, very similar to the MSG Token Ring
794 * ex/async_waitAll: new example, on asynchronous communications
797 * Memory usage should be decreased for simulations with a large number
798 of processes. This also helps for SMPI.
800 SimGrid (3.13) stable; urgency=low
802 The Half Release, a.k.a. the Zealous Easter Trim.
804 - We removed half of the lines, that were mostly experimental cruft.
805 v3.12 lasted 286000 lines of code, v3.13 is only 142000 lines
806 (not counting blanks and comments -- according to openhub.net)
807 - The internals are now compiled in C++ (and will soon be clean C++)
808 - We removed 75 klines of XML, 12 klines of Java, 5 klines of cmake,
809 59 klines of C, etc. We added only 29 klines of C++ in replacement.
811 * Backwards Compatibility breaks
812 - Removed Lua simulation bindings (switch to C or Java for that).
813 Lua can still be used to describe platforms
814 - Removed Java kernel plug-ins.
815 Will be reintroduced after the ongoing major internals reorg.
817 - the following functions were removed.
818 They were too specific and should be reimplemented in a generic
819 way, with filter function.
820 - MSG_task_listen_from_host
821 - MSG_mailbox_get_count_host_waiting_tasks
822 - MSG_mailbox_put_with_timeout was removed.
823 Please use MSG_task_send_with_timeout instead.
825 - the SD_application_reinit function was removed. It has been a noop for a while.
826 - The ACCESS_MODE of SD_workstation has been removed. This feature was not really usable and should soon be
827 replaced by a more flexible mechanism.
828 - The following functions thus do not exist anymore
829 - SD_workstation_get_access_mode
830 - SD_workstation_set_access_mode
831 - SD_workstation_get_current_task
832 - Basic estimation functions have been removed but can easily be replaced
833 - SD_route_get_communication_time => SG_route_get_latency() + amount / SD_route_get_bandwidth()
834 - SD_workstation_get_computation_time => amount / sg_host_speed()
836 - VM.setBound(int load) is now VM.setBound(double bound) to meet the MSG semantics.
837 Use VM.getSpeed()*load/100 for the legacy behavior.
839 - option enable_tracing was removed. It was not doing anything for a while.
840 - In the ModelChecker:
841 - the model-checker now ptraces the model-checked process which means
842 you cannot use a debugger on the latter anymore (we might make this
843 optional in the feature);
844 - removed soft-dirty page tracking;
845 - remove model-checked side snapshot management,
846 MC_snapshot() and MC_compare_snapshot();
847 - keep the MC_cut() function as a stub (it was not really working
848 in the previous release).
851 * All options are consistently in kebab-case. Old names are kept as alias.
854 * Switch to platform v4 format.
855 - Rename from 'power' to 'speed' the attributes describing the amount of
856 flops that a <host>, <peer>, <cluster> or <cabinet> can deliver per second.
857 - In <trace_connect>, attribute kind="POWER" is now kind="SPEED".
858 - In <host> and <link>, attributes availability and state are gone.
859 It was redundant with state and availability traces, and with peak values.
860 - In <cluster>, attributes availability_file and state_file are gone.
861 It was too complex and unused.
862 - Kill <gpu>. Was not doing anything.
863 - The DOCTYPE points to the right URL:
864 http://simgrid.gforge.inria.fr/simgrid/simgrid.dtd
865 (the file at this address now documents the changelog since its v1)
866 - A warning is emitted for unit-less values (they are still accepted).
867 - speed. Default: 'f' or 'flops'. Also defined:
868 'Yf', 'Zf', 'Ef', 'Pf', 'Tf', 'Gf', 'Mf', 'kf'
869 'yottaflops', 'zettaflops', 'exaflops', 'petaflops', 'teraflops', 'gigaflops', 'megaflops', 'kiloflops'
870 - bandwidth. Default: 'Bps' bytes per second (or 'bps' for bits but 1 Bps = 8 bps)
871 Also defined in bytes: 'TiBps', 'GiBps', 'MiBps', 'KiBps', 'TBps', 'GBps', 'MBps', 'kBps', 'Bps'
872 And the same in bits: 'Tibps', 'Gibps', 'Mibps', 'Kibps', 'Tbps', 'Gbps', 'Mbps', 'kbps', 'bps'
873 - latency. Default: 's' second. Also defined:
874 'w' week, 'd' day, 'h' hour, 'm' minute, 'ms' millisecond, 'us' microsecond, 'ns' nanosecond, 'ps' picosecond
876 * bin/simgrid_update_xml can upgrade your files automatically (won't convert unit-less values)
877 tools/sg_xml_unit_converter.py may help (but it's just a warning and will probably ever be).
880 * s4u::Host is now the preferred public interface to the Host features.
881 sg_host_* functions are C bindings to the exact same behavior
882 MSG_host_* and SD_workstation_* are #define to the sg_host_* ones
885 * The examples were completely reorganized (in C and Java), for your browsing pleasure.
886 * Kill all deprecated functions (the ones you had when declaring MSG_DEPRECATED).
887 They were deprecated since a few years, and probably did not even compile anymore.
890 * The API has been profoundly modified to directly use the core objects instead of redefining its own.
891 SD_Workstation_t and SD_link_t are now sg_host_t and sg_link_t respectively.
892 Some functions have also been renamed for consistency. Backward compatibility is maintained, but users are
893 encouraged to update their codes. A list of the modified functions can be found at the end of
894 include/simgrid/simdag.h
897 * simgrid::simix::kernelImmediate() is the closure callback. It ensures that
898 the lambda or closure passed as a parameter will run in kernel mode.
899 All the callback functions should be rewritten to that interface at some point.
902 * Reorganizing and cleaning the internals all around the place.
905 * Remove old default barrier/bcast buggy algorithms (see #18407)
906 * Various bug fixes to handle more codes
907 * Remove the need for the --foreground option of smpirun (it is still
908 accepted for backward compatibility).
911 * Kill the setset data container: MC don't use it anymore.
912 * Kill the queue data container: it made more sense with GRAS.
913 * Kill the xbt_peer_t data type: it's useless without GRAS.
914 * Kill rm_cb feature of config sets: it was never useful.
915 * Kill graphxml parsing feature. It was not used.
916 * Kill the deprecated code protected by XBT_USE_DEPRECATED
918 - xbt_dynar_sort_strings(), when the content is char*
919 - xbt_str_parse_int / xbt_str_parse_double, wrapping strtol/strtod
920 They throw exceptions on invalid input;
921 * C++ support for declaring CLI flags (simgrid::config::Flag);
922 * class for abstracting different signal backends (simgrid::xbt::signal).
923 with no external dependencies (we need very simple signals).
926 * refactoring and cleanup of the code;
927 * ongoing process to cleanly separate the model-checking algorithms
928 from the code model-checking support.
930 -- Wed Apr 27 21:00:53 CEST 2016 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
932 SimGrid (3.12) stable; urgency=low
934 The Facelift Release.
937 * Require g++ v4.7 at least to not speak prehistorical C++.
938 * Require Boost 1.48 (for signal2 component).
939 * Java must be version 7 at least when activated.
940 * Builds on Windows again (including Java bindings).
941 * Tracing is now always enabled (no way to turn it out)
942 * Remove GTNetS. It was not working anyway.
943 * Various cleanups in the cmake scripts.
944 * Move headers around to sort them out on installed systems:
945 - instr/instr.h -> simgrid/instr.h
946 - instr/jedule/* -> simgrid/jedule
947 - simdag/datatypes.h was removed
948 - simdag/simdag.h -> simgrid/simdag.h
949 - msg/datatypes.h was removed
950 - msg/msg.h -> simgrid/msg.h
953 * Interface improvement:
954 - Rename MSG_host_is_avail(h) to MSG_host_is_on(h)
955 - Sanitize the interface in MSG_task_ module:
956 - Merge two functions that were close enough but misleading:
957 set_compute_duration(t) -> set_flops_amount(t)
958 get_remaining_computation(t) -> get_flops_amount(t)
959 - set_data_size(t) -> set_bytes_amount(t)
960 get_data_size(t) -> get_bytes_amount(t)
961 - Massive cleanups in the functions related to the energy
962 - MSG_host_get_pstate_number() -> MSG_host_get_nb_pstates()
963 - New: MSG_host_get_pstate()
965 - msg/energy/onoff: switching hosts on and off
967 * Interface improvement:
968 - Rename Host.isAvail() to Host.isOn()
969 - Rename Process.currentProcess() to Process.getCurrentProcess()
970 - Rename Task.setDataSize() to Task.setBytesAmount()
971 - Merge Task.getRemainingDuration() and Task.getComputeDuration() into Task.getFlopsAmount()
973 - #18874: Actually allows the GC to reclaim tasks
977 - SIMIX_process_throw: raises an exception in a remote process
978 * Refactoring: Separate sub-modules
979 - libsmx: the public interface, as libc in a real system
980 - popping: the strange dance that converts a user request into a kernel handling
981 - smx_context_*: the virtualization mechanisms that embed the user code
982 - smx_*: the handling of each simcalls
984 - simcall_host_set_power_peak_at -> simcall_host_set_pstate
985 * Rename smx_action_t into smx_synchro_t, making explicit that these
986 things are used to synchronize processes with their environment.
987 For example, a communication is a sort of synchronization involving
988 the communicating processes (that may block until the exchange) and
989 the platform. The same can be said from computations, etc.
991 - #18888: segfault when a process ends before its kill_time
995 - 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.
996 - MPI_Keyval*, MPI_Attr* functions, as well as MPI_Comm_attr*, MPI_Type_attr* variants (C only, no Fortran support yet)
997 - MPI_Type_set_name, MPI_Type_get_name
998 - MPI_*_c2f and MPI_*_f2c functions
999 - MPI_Info_* functions (beware, get_nthkey may not follow the insertion order)
1000 - MPI_Pack, MPI_Unpack and MPI_Pack_size functions
1001 - Activate a lot of new tests from the mpich 3 testsuite
1003 - Constant times can be injected inside MPI_Wtime and MPI_Test through options smpi/wtime and smpi/test
1004 - InfiniBand network model added: Based on the works of Jerome Vienne
1005 http://mescal.imag.fr/membres/jean-marc.vincent/index.html/PhD/Vienne.pdf
1006 - When smpi/display_timing is set, also display global simulation time and application times
1007 - Have smpirun, smpicc and friends display the simgrid git hash version on --git-version
1008 * Collective communications
1009 - 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
1010 - 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/).
1011 - Support for Rabenseifner Reduce/Allreduce algorithms (https://fs.hlrs.de/projects/par/mpi//myreduce.html)
1013 - Replay now uses algorithms from wanted collective selector
1014 - Replay can be used with SMP-aware algorithms
1015 - Memory occupation of replay should now be contained (temporary buffers allocated in collective algorithms should be shared between processes)
1016 - 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.
1018 - [#17799]: have mpi_group_range_incl and mpi_group_range_excl better test some corner cases
1019 - Correctly use loopback on fat-tree clusters
1020 - Asynchronous small messages shouldn't trigger deadlocks anymore
1021 * Energy/DVFS cleanup and improvement
1022 - smpi_set_host_power_peak_at() -> smpi_set_host_pstate()
1023 - new: smpi_get_host_pstate()
1026 - "Full" network optimization flag was broken since Surf++
1027 - Better handling of precision flags in maxmin
1028 - Fix bug causing sometimes "Impossible" errors
1029 - Properly pass cluster properties to included hosts
1030 * Improvement of the Energy plugin.
1031 - Always update the consumption before returning that value
1032 - New property: watt_off to denote the dissipation when the host is off
1033 - New functions getWattMinAt and getWattMaxAt to retrieve the
1034 dissipation of pstates that we are not currently at.
1035 * Java: class NetworkLink renamed to Link
1036 * New function: simcall_process_get_kill_time()
1037 * Massive rename s/workstation/host/
1038 - That's intrusive, but that's good for the project consistency. Sorry.
1039 - Change config option "workstation/model" into "host/model"
1042 - Add a xbt_heap_update function, to avoid costly xbt_heap_remove+xbt_heap_insert use
1043 - Add a xbt wrapper for simcall_mutex_trylock (asked in [#17878])
1044 - Add two new log appenders: rollfile and splitfile. Patch by Fabien Chaix.
1045 - xbt_dirname and xbt_basename for non-POSIX systems
1047 * The model checker now runs as a separate process.
1048 * The model checker runs must now be launched with the new simgrid-mc program.
1049 * Record/Replay: the MC can display a textual representation of a path in the
1050 execution graph. It can then be replayed outside of the model checker.
1052 -- Mon Oct 12 06:02:41 CEST 2015 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1054 SimGrid (3.11) stable; urgency=low
1059 * Normalizing pointers addresses tool for better diff between logs
1062 * Add cloud examples using new VMs
1063 - examples/msg/cloud/two_tasks_vm.tesh
1064 - examples/msg/cloud/simple_vm.tesh
1065 - examples/java/cloud/cloud.tesh
1066 - examples/java/cloud/migration/migration.tesh
1067 * Add java surf examples:
1068 - examples/java/surfPlugin/surf_plugin.tesh
1069 - examples/java/reservationSurfPlugin/reservation_surf_plugin.tes
1070 - examples/java/surfCpuModel/surf_cpu_model.tesh
1071 * Add SMPI+MSG example:
1072 - examples/smpi/smpi_msg_masterslave/
1077 - msg task destroy cancel test
1078 - msg_host on/off test
1079 * Move all tests in testsuite to teshsuite (adding tesh files)
1080 * Restructure teshsuites
1081 - one folder for each kind of test
1082 * Restructure AddTests.cmake
1084 - structure the order of tests (with sections)
1087 * Add virtual machine
1088 - creation of a VM on a PM
1089 - migration of a VM from a PM to another PM
1091 - MSG_process_join(msg_process_t process, double timeout)
1092 - msg_bar_t MSG_barrier_init(unsigned int count)
1093 - int MSG_barrier_wait(msg_bar_t barrier)
1094 - void MSG_barrier_destroy(msg_bar_t barrier)
1095 - msg_as_t MSG_environment_as_get_by_name(const char * name)
1096 * New option "msg/debug_multiple_use" to help debugging when a task is used
1099 - Improvements and finalization of MSG_storage, MSG_file APIs and their
1101 - Increase code coverage in test suites
1105 * Protect context stacks against stack overflow. The number of protected memory
1106 pages allocated on the top of each stack (1 by default) can be configured
1107 with the new command line option --cfg=contexts/guard_size:<value>.
1108 * Simcalls are now generated by a python script that
1109 - generates files included by SimGrid
1110 - checks that all the functions exist, and proposes prototypes
1112 - remove sem_destroy, file_set_data, comm_destroy, vm_set_state,
1113 host_set_data, host_get_data
1115 - simcall_process_join(smx_process_t process, double timeout)
1116 * Fix bug where sleeping processing could not be suspended.
1119 * Translate surf models from C to C++
1120 - Generic classes for all models: Model, Resource, Action
1121 - A generic interface for each kind of model (CPU, Network, Storage
1122 Workstation, WorkstationVM)
1124 * Translate surf routings from C to C++
1125 * Add callbacks using sigc++ or boost::signals2
1126 - Add callback functions for resource creation/destruction
1127 - Add callback functions for action state change
1128 - Handle Energy as a plugin
1129 * Replace swag by boost::intrusive
1130 * Add new routing models for clusters. For documentation, see
1131 http://simgrid.gforge.inria.fr/simgrid/latest/doc/platform.html#pf_cluster
1132 - tori, with topology="TORUS" and topo_parameters="ndim1,ndim2,...,ndimn"
1133 parameters for cluster tag
1134 - Fat trees, with topology="FAT_TREE" and
1135 topo_parameters="h;m1,...,mh;w1,...,wh;p1,...,ph" parameters for cluster tag
1136 - see examples/platforms/torus_cluster.xml and
1137 examples/platforms/fat_tree_cluster.xml
1138 * More documentation
1141 * Hostfiles support host:nb_processes construct to deploy several processes on
1143 * Collective communication algorithms should not crash if used with
1144 improper number of nodes and report the error.
1145 * SMPI now partially supports MPI_Topologies: MPI_Cart_create, MPI_Cart_shift,
1146 MPI_Cart_rank, MPI_Cart_get, MPI_Cart_coords, MPI_Cartdim_get,
1147 MPI_Dims_create, MPI_Cart_sub are supported.
1148 * New interface to use SMPI programmatically (still depends on MSG for
1149 some parts, see examples/smpi/smpi_msg_masterslave):
1150 - SMPI_app_instance_register(const char *name, xbt_main_func_t code,
1154 * Global variables privatization in MPI executables is now performed at runtime
1155 with the option smpi/privatize_global_variables (default:no).
1156 Limitations: Linux/BSD only, with mmap enabled. Global variables inside
1157 dynamic libraries loaded by the application are not privatized (static
1158 linking with these libraries is advised in this case)
1161 * Options defined in XML work correctly now.
1164 * New cmake option, enable_lib_in_jar, to control whether native libraries are
1165 copied into simgrid.jar or not (ON by default). Use this option if you want
1166 to reduce the size of the installed simgrid.jar, *and* the native libraries
1167 are kept installed elsewhere.
1168 * Surf binding with SWIG (code generated in maintainer mode only):
1169 - plugin to handle callbacks
1170 - CPU model only for the moment
1173 * Supernovae build mode is definitively removed. It was used to improve
1174 inlining and inter-module optimizations. It is nowadays superseded by
1175 link-time optimizations commonly available in compilers.
1176 * Update ns-3 find lib. Bindings for ns-3 should work again now.
1177 * Add boost dependency for surf++
1178 * Add new macro for tests
1179 - ADD_TESH(name <tesh_args>)
1180 - ADD_TESH_FACTORIES(name "thread;ucontext;raw" <tesh_args>)
1184 - xbt_bar_t XBT_barrier_init(unsigned int count)
1185 - int XBT_barrier_wait(xbt_bar_t barrier)
1186 - void XBT_barrier_destroy(xbt_bar_t barrier)
1187 * Make the xbt_os_time module public
1189 -- Sat May 31 22:39:38 CEST 2014 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1191 SimGrid (3.10) stable; urgency=low
1193 The Clean Diaper Release, a.k.a. SimGrid is leak-free.
1196 * Reintegrate Java to the main archive as desynchronizing these
1197 package is not acceptable anymore (Java is now considered stable)
1198 * Add explicit synchronization facilities through semaphores
1199 * Bug fix: Task.setDataSize() only changed the C world, not the value
1200 cached in the Java world
1203 * Dramatically change the way files are handled. API and internals changed, but
1204 this part of MSG was not considered as production grade either.
1205 * Add explicit synchronization facilities through semaphores
1206 * Add a new function MSG_host_get_process_list()
1207 * Preliminary DVFS support (see examples/msg/energy/ for details)
1210 * SMPI is now included directly in the libsimgrid as the windows
1211 linker doesn't force us on splitting it anymore.
1212 * Improvements of the SMPI replay tool:
1213 - Most of the collective communications are now rooted in the same process as
1214 in the original application.
1215 - Traces now rely on the same MPI data type as the application (MPI_BYTE was
1216 used until now). Multiple data types can now be used in a trace.
1217 - The replay tool now supports traces produce either by TAU or a modified
1219 - Bug Fix: the compute part of the reduce action is now taken into account.
1220 - Gatherv collective is now supported
1221 - SimGrid (SMPI for now) can generate replay traces as well. Option -trace-ti
1222 of smpirun outputs time independent traces for the current run. One file
1223 is created per process. If too many processes are simulated, this behavior
1224 can be changed to one file for all processes by using the
1225 tracing/smpi/format/ti_one_file flag
1226 * smpirun generates the host file if needed (with given host count and platform)
1227 * Integration of more than 100 STAR-MPI, MPICH, OpenMPI collective algorithms
1228 - allows to select one in particular with --cfg=smpi/coll_name:algorithm
1229 - allows to use the decision logic of OpenMPI(1.7) or MPICH(3.0.4) by setting
1230 --cfg=smpi/coll_selector:(mpich/ompi)
1231 * Support for new functions: MPI_Issend, MPI_Ssend, Commutative operations in
1233 * Add a --cfg:tracing/smpi/internals option, to trace internal communications
1234 happening inside a collective SMPI call.
1235 * Fix the behavior of complex data types handling.
1236 * Make MPI_Wtime another synchronization point to take computations into
1238 * Replace MPICH-1 test suite by the one from MPICH 3.0.4. Can be built using
1239 enable_smpi_MPICH3_testsuite flag in cmake. Run with ctest.
1240 * Add all missing Fortran bindings, SMPI should work with Fortran 90
1241 (no privatization of global variables yet)
1242 * Preliminary DVFS support (see examples/smpi/energy/ for details)
1245 * Verification of liveness properties is now available for SMPI applications
1246 (in addition to MSG applications)
1247 * Bugged examples using SMPI in examples/smpi/mc/
1248 * Add --cfg=model-check/visited option. Allows the verification of infinite
1249 programs. Detection of loops in the execution thanks to the system state
1250 comparison and reduction of the state space to explore. Can be combined with
1251 DPOR for safety properties.
1254 * Allow to change SimGrid configuration (see --help) within the code
1255 thanks to SD_config() as it can be done in MSG.
1256 * Add a new function SD_task_set_amount() upon user request.
1259 * Handle units for values (10ms, 10kiloflops, 10Bps, 1GB, ...)
1260 * Remove rule based routing (no more PCRE dependency)
1261 * Add a limiter_link option to cluster tag, to specify a maximum reachable
1262 bandwidth in fullduplex mode when it is less than twice the nominal bandwidth.
1263 * Add a loopback_bw and loopback_lat options to cluster tag.
1264 * Fix the peer tag that could not be mixed with other AS within a Vivaldi
1265 routing. Now peers are encapsulated in an AS and have their own private
1266 router but this is transparent.
1269 * Our own implementation of getline is renamed xbt_getline, and gets
1270 used even if the OS provide a getline(). This should reduce the
1271 configuration complexity by using the same code on all platforms.
1272 * New type: xbt_cfg_elm_boolean.
1273 * Allow to use yes/no for boolean configuration options in the command line.
1274 * Allow to disable SimGrid cleanups at exit from command line option.
1275 There are situations where one may want a simulation to end with an exit.
1276 Unfortunately, calling exit may cause SimGrid to segfault, which is quite
1277 annoying when scripting around the simulator. Adding a
1278 --cfg=clean_atexit:no allows to circumvent this issue.
1281 * Lots of memory leaks were corrected in this release.
1282 There is no known memory leaks anymore, in all of our 600+ tests.
1283 * New command line option --version, to get SimGrid version information.
1284 Packagers may want to add extra words to SIMGRID_VERSION_EXTRA defined in
1286 * Supernovae builds are deprecated, and expected to be removed in the next
1289 -- Sun Nov 17 00:26:44 CET 2013 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1291 SimGrid (3.9) stable; urgency=low
1293 The Grasgory release: GRAS is really dead now.
1295 * Complete overhaul of the internal host structures scheme.
1298 * If you use GRAS, you should stay at SimGrid 3.5 (at most) since it
1299 was considered as experimental and badly maintained since then.
1300 * Keeping it was thus a trap to our potential users, that could take
1301 it instead of MSG or SMPI by mistake despite is pity state.
1302 * GRAS seems to have very few users (if any), and no one volunteered
1303 to maintain it further. It also induces a lot of XBT code (for
1304 portability sake), that must be maintained too.
1305 * For all these reasons, we killed GRAS. If someone wants to revive it
1306 in the future, don't cry, our git history still remembers of GRAS.
1309 * Major overhaul. Merge our documentation again as time proved that
1310 splitting it was really not helping our users.
1311 * Further improve the developer documentation to help newcomers
1312 hacking on SimGrid itself. The user documentation (and in
1313 particular, the beginner documentation) is still in a sorry state.
1316 * Now works on Windows too!
1317 * Much more extensive test suite, from MPICH
1320 * Add a new loader (SD_PTG_dotload) that creates a parallel task graph
1321 (i.e., a DAG whose nodes are parallel tasks) from a dot file. Creates a
1322 dynar of SD_TASK_COMP_PAR_AMDAHL and SD_TASK_COMM_MXN_1D_BLOCK tasks.
1323 * Bug fix: let task be scheduled when the last dependency to be solved is
1324 a control dependency.
1325 * Remove SD_load_environment_script function.
1326 Use the C sg_platf function if you want to declare a platform
1330 * New function: MSG_process_get_number()
1331 * Old function documented: MSG_config()
1332 * Remove MSG_load_platform_script function
1333 Use the C sg_platf function if you want to declare a platform
1337 * Change the default value of the TCP_gamma constant (maximal size of TCP
1338 congestion window) to a more realistic 4MiB value. If you notice changes in
1339 your simulation results, you can fall back to the previous 20k tiny window
1340 by adding --cfg=network/TCP_gamma:20000 on command line.
1341 * (Hopefully) fix a bug wrt periodic availability and state traces
1342 * Bug fix: use default values at start when first event in availability/state
1343 trace is not at time 0.
1346 * remove the "new_" part of function name sg_platf_new_trace_connect
1347 (resulting in sg_platf_trace_connect), since it does not create
1351 * Kill synchronized dynars, and xbt_dynar_dopar(). We cannot think of a
1352 use case where it's really mandatory, and maintaining it was a pain in
1354 * New: xbt_fifo_search(), search an item with a user-provided
1355 comparison function instead of dumb pointer comparison.
1358 * Fix the lua deployment:
1359 Use `simgrid.init_application()` before deployment instead of
1360 `simgrid.msg_register_application()` after.
1363 * Transfer the tracing files into the corresponding modules.
1365 -- Tue Feb 5 11:31:43 CET 2013 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1367 SimGrid (3.8.1) stable; urgency=low
1369 The "we are told that some people want to also *install* the simgrid
1372 * Add missing file "tesh.1" to the archive.
1374 -- Sat Oct 27 16:12:11 CEST 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1376 SimGrid (3.8) stable; urgency=low
1378 The Psssshiiiit release: SimGrid jumps into the Cloud.
1381 * Add an experimental interface to manipulate VMs. They are mainly
1382 process groups with very few intrinsic semantic, but they should
1383 allow you to build the semantic you want easily.
1384 * New function: MSG_host_set_property_value()
1385 * New function: MSG_process_on_exit(). To clean memory in all cases.
1386 * Bug fixes that made the host (and link) failures unusable.
1387 * Add a way to auto-restart process when the host in which they are
1388 executing comes back (ON_FAILURE="RESTART" on deployment file,
1389 MSG_process_auto_restart_set).
1390 * Use the "msg_" prefix for all datatypes (instead of m_, msg_ and MSG_),
1391 please stop using the old ones, they are DEPRECATED.
1393 * Deprecate functions MSG_global_init() / MSG_global_init_args()
1394 Please use MSG_init() instead. (reducing the amount of entry
1395 points in the library helps us).
1396 * Make it impossible to link against the wrong version of the lib
1397 * Deprecate MSG_clean(). No need to call it anymore.
1398 * Function MSG_get_host_number() is not deprecated anymore.
1401 * Split the doc into a user guide and a reference guide.
1402 * Start a developper guide to help people hacking on SimGrid.
1405 * Enable tracing by default. This modules rocks you should use it.
1406 * Remove option custom_flags. Now use environment variables CFLAGS
1408 * Use default cmake things to detect lua instead of home grown ones.
1409 * New option "enable_mallocators" to disable mallocators, for debugging
1410 purpose ("on" by default).
1413 * Bug fixes around the resource failures: don't let the processes
1414 survive the host they are running onto.
1415 * Add an interface to auto-restart processes when the host in which they are
1416 executing comes back.
1417 * Ensures that SIMIX_clean is called automatically. It's not part of
1418 the public interface anymore (bindings should be updated).
1421 * Bug fix for when SD_Simulate is called with a positive value: be careful
1422 when comparing doubles. Sometimes they are different for non significant
1424 * New types of typed tasks. SD_TASK_COMP_PAR_AMDAHL represents a
1425 parallel task whose initial work is distributed among host according
1426 to the Amdahl's law. Such tasks are created with a parameter alpha
1427 that corresponds to the non-parallelizable part of the computation.
1428 SD_TASK_COMM_PAR_MXN_1D_BLOCK represents a complex data redistribution
1429 between two sets of workstations assuming a 1D block distribution (each
1430 workstation owns a similar share of data) on both sides.
1432 These tasks can be scheduled with SD_task_schedulel or SD_task_schedulev.
1433 Data redistribution will be automatically scheduled once parent and child
1434 are both scheduled. The filling of computation_amount and
1435 communication_amount structures is now done seamlessly thanks to the chosen
1437 * New function SD_workstation_dump to display various information
1438 * New function SD_task_set_rate to throttle the bandwidth allowed to be used
1439 by a SD_TASK_COMM_E2E typed task. This rate depends on both the nominal
1440 bandwidth on the route onto which the task is scheduled and the amount of
1442 To divide the nominal bandwidth by 2, the rate then has to be:
1443 rate = bandwidth/(2*amount)
1444 * Compute tasks that have failed can now be rescheduled and executed again
1445 (from their beginning)
1446 * Increasing source code coverage (src/simdag is now covered at 95.8%
1450 * Re-implement time-independent trace replay using SMPI (at the
1451 smpi_smp_* level) instead of MSG. This should replace
1452 examples/msg/actions/actions.c
1453 * Implement support of MPI Datatypes (vectors, hvectors, indexed,
1454 hindexed and structs)
1455 * Implement the exchange of non-contiguous data.
1456 [Khalid Hasanov & Jean-Noel Quintin] Thanks for the patch, guys.
1457 * Correct behavior of smpi/sender_gap and set its default value to 0
1458 * Add option to asynchronously send small messages to allow better
1459 simulation of pt2pt communications. --cfg=smpi/async_small_threshold:value
1460 specifies the size in bytes under which messages will be asynchronously sent.
1461 * Add support of MPI_Iprobe, MPI_Probe, MPI_Testall, MPI_Wtick functions
1462 * SMPI now handles more MPI specific values in input. Closes [#14389] and [#14388]
1465 * New C interface to define a platform: XML is now optional.
1466 For more info, please check include/simgrid/platf.h.
1467 * New interface to define random platforms from the C:
1468 For more info, please check include/simgrid/platf_generator.h and
1469 examples/msg/masterslave/masterslave_platfgen.c
1470 * Export a sg_cmdline dynar containing all the arguments we got from
1474 * Two new tracing options for adding comments to trace file so you
1475 can track your experiments (see --help-tracing for details).
1476 * New option to generate a impoverished trace file (--cfg=tracing/basic:1)
1477 * Adding the SimGrid version that generated the trace file as a comment.
1478 * Instrumenting other MSG functions (MSG_task_isend_with_matching and MSG_task_dsend)
1479 * Fix to avoid key clashes on Paje links
1480 * Other minor fixes related to the Paje specification
1483 * Functions xbt_dict_hash() and xbt_dict_hash_ext() are made public,
1484 and renamed to xbt_str_hash() and xbt_str_hash_ext().
1485 * New function: xbt_os_timer_resume() to restart a timer w/o resetting it.
1486 * Greatly improve the robustness of mmalloc to user errors (such as
1487 using an area after freeing it, or freeing it twice)
1489 -- Thu Oct 25 17:30:06 CEST 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1491 SimGrid-java (3.8.1) stable; urgency=low
1493 * New module: org.simgrid.trace.Trace (SimGrid trace bindings)
1494 Warning: all methods are visible, but only some of them are
1495 implemented so far. Check the source (src/jtrace.c)
1496 for further information.
1497 * New module: org.simgrid.msg.File (SimGrid File management functions)
1498 * New Module: org.simgrid.msg.VM (SimGrid interface to mimick IAAS clouds)
1499 * Change the meaning of Process.restart: now restart the process from
1500 the begining, like MSG_process_restart in C.
1501 * Add Process.setAutoRestart: handling of process restart when failed
1503 * Add Process.getProperty, Host.getProperty, Host.getProperty: allows
1504 you to retrieve the properties of the processes/hosts
1505 * Deprecate Msg.clean(): you can just forget about it now.
1506 * New function Process.getCount(), that only works when compiling
1507 with the not yet released version 3.9 of the C library.
1509 * New context factory based on Coroutines. It mandates a modified JVM
1510 but then, the simulations run about five times faster, and there is
1511 no limit to the amount of processes (beside of the available memory).
1513 -- 2012-12-04 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1515 SimGrid (3.7.1) stable; urgency=low
1518 * Restore the prototype of MSG_process_create_with_environment() to
1519 the pre-3.7 situation by removing the kill_time argument.
1520 * Add a MSG_process_set_kill_time() function instead.
1523 * Fix weird behaviors when dealing with parallel tasks.
1526 * Simgrid is now built as a dll.
1527 * Simgrid-java now works on Windows.
1528 * Simgrid-Java is now included into Windows package.
1531 * First pre-build package for MacOSX.
1534 * Fix compilation when using MSG_USE_DEPRECATED.
1535 * Fix some compilation issues on Macs and Windows.
1536 * Reduce the number of failing tests on exotic systems, like Debian/Hurd.
1537 * Environment variables CFLAGS and LDFLAGS are now honored by cmake.
1539 We discovered that the Lua console is broken, but we are missing the
1540 manpower to fix it right now. The problem existed in 3.7 too, so we
1541 are not blocking the release for that. Sorry if you depended on this
1542 feature, any help would be really welcome.
1544 -- Thu Jun 7 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1547 SimGrid-java (3.7.1) stable; urgency=low
1549 The "Java aint got to be bloated and slow" release
1552 * Various internal cleanups and performance improvement
1553 Simulations are expected to run up to twice faster or so
1554 * Make Process.kill(process) an instance method, not a static one
1555 * User processes are not java.lang.Thread subclasses.
1556 This breaks the compatibility (sorry), but previous API was
1557 brain-dead, making it impossible to have non-trivial
1558 initializations in the process constructor.
1559 * Require a full constructor per Process sub-class.
1560 Kinda breaks the compatibility (sorry), but this allows a much more
1561 efficient way to launch the processes at simulation startup.
1562 * Do not embeed our version of semaphores, java 1.5 can be considered
1563 as sufficiently prevalent for us to not dupplicate its features.
1567 * Add examples for almost every part of the API
1568 We spotted and fixed a lot of bugs in the process
1570 * New module: asynchronous communication API
1571 * New function: Process.sleep()
1572 It takes milliseconds as argument, just as java.lang.Thread.sleep()
1573 * New module: org.simgrid.msg.Mutex (SimGrid mutexes)
1574 * New module: org.simgrid.msg.RngStream (RngStreams random generators)
1576 -- 2012-06-12 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1578 SimGrid (3.7) stable; urgency=low
1580 The "spring cleanups (before the next Big Project kicks in)" release.
1583 * We can specify the SMPI latency/bandwidth factor with command line
1584 add --cfg=smpi/bw_factor:"threshold0:value0;...;thresholdN:valueN"
1585 or add --cfg=smpi/lat_factor:"threshold0:value0;...;thresholdN:valueN"
1586 You can also use the "config tag" from platform file by adding this line
1587 <prop id="smpi/bw_factor" value="threshold0:value0;...;thresholdN:valueN"></prop>
1588 (see "example/platforms/tag_config.xml" to use "config tag").
1589 Note that the command line supersedes the platform file configuration.
1590 * Change the correction factors used in LMM model, according to
1591 the latest experiments described in INRIA RR-7821.
1592 Accuracy should be improved this way.
1593 * Use the partial invalidation optimization by default for the
1594 network too. Should produce the exact same results, only faster.
1595 * Major cleanup in surf to merge models and split some optimization
1596 mechanisms from the core of the models. As a result you can now
1597 specify which model to use (e.g., --cfg=network/model:LV08
1598 --cfg=cpu/model:Cas01) and which optimization mode to use
1599 (e.g., --cfg=network/optim:lazy --cfg=cpu/optim:TI).
1600 Incompatible combinations should err at initialization. See
1601 --help-models for the list of all models and optimization modes.
1602 * The CLM03 workstation model was dropped for simplicity because it
1603 used the deprecated CM02 network model. Use default instead.
1604 * Rename the TCP_gamma configuration option to network/TCP_gamma
1605 * Rename the coordinates configuration option to
1606 network/coordinates, and document it
1607 * Use now crosstraffic keyword instead of the terribly misleading
1608 fullduplex keyword. It is activated by default now in the current
1609 default model, use --cfg=network/crosstraffic:0 to turn it off.
1610 * Ongoing refactoring the model parsing to make XML files optional
1611 See include/simgrid/platf.h for details (still to be completed)
1614 * Major overhaul of the documentation. Almost instructive now :/
1615 * Deprecate the use of m_channel_t mechanism like MSG_task_{get,put}
1616 functions and friends. This interface was considered as
1617 deprecated since over 2 years, it's time to inform our users that it is.
1618 Switch to MSG_task_{send,recv} instead, or compile SimGrid command line
1619 'cmake -Dcustom_flags="-DMSG_USE_DEPRECATED" .' if you really need to
1620 use these (crappy) functions in your code.
1621 These functions will be removed soon. Stop using them now.
1622 * Deprecate MSG_get_host_{table,number}
1623 Implement MSG_hosts_as_dynar() instead.
1624 * Implement MSG_processes_as_dynar() (Closes gforge #13642)
1625 * Remove the public field msg_host_t->name. Use MSG_host_get_name()
1628 * Stabilize the parallel execution mode of user contexts
1629 * Introduce configuration variables to control parallel execution:
1630 - contexts/synchro: Synchronization mode to use when running
1631 contexts in parallel (either futex, posix or busy_wait)
1632 - contexts/parallel_threshold: Minimal number of user contexts
1633 that must be part of a scheduling round to switch to parallel
1634 execution mode (raw contexts only)
1635 * Fix bugs that prevented to use suspend/resume along with
1636 synchronization structures.
1637 * Fix bugs in process termination that lead to invalid memory access
1638 in very specific conditions.
1641 * Introduce a parallel mode for the models (controlled by surf/nthreads
1642 configuration item). In our tests, running the models in parallel
1643 never lead to any speedups because they are so fast that the gain
1644 of computing each model in parallel does not amortizes the
1645 synchronization costs, even when ultra fast futexes are used.
1646 This is released anyway because YMMV.
1649 * Performance boost by using a swag internally to compute the set of
1650 tasks that are finished and should constitute the return value of
1654 * Enable it by default now that it is considered rather stable.
1657 * Documentation of the tracing functions.
1658 * Performance gains when tracing categorized/uncategorized resource
1659 utilization by avoiding calls to get route when updating resource
1660 variables. LMM constraints are being used instead.
1661 * API changed to set task categories. Use MSG_task_set_category instead
1662 of TRACE_msg_set_task_category, and SD_task_set_category instead
1663 of TRACE_sd_set_task_category. They only work if ENABLE_TRACING is ON.
1664 * Bugfix for graphicator, routes not correctly obtained, memory leaks
1665 * Examples for link user variables added (see at examples/msg/tracing/)
1666 * Deprecated function TRACE_msg_set_process_category completely removed
1667 * Trace header updated according to the latest Paje file format
1668 * Tracing network lazy updates, no longer obligate users to use full updates
1669 * --cfg=tracing/platform:1 also registers power/bandwidth variables
1670 * Experimental: let user code declare/set/push/pop application states for hosts
1671 * API changed to allow the manual creation of graph configuration files
1672 for Triva. See TRACE_get_node_types() and TRACE_get_edge_types().
1675 * Improve the API of Lua MSG bindings, using the Lua spirit.
1676 * Each simulated process now lives in its own Lua world (globals are
1677 automatically duplicated). It helps writing simulators. Will allow
1678 to run Splay programs within SimGrid in the future.
1679 * Add a Chord example in Lua, equivalent to the MSG one.
1682 * Start the implementation of a solution to express temporal
1683 properties, not only local assertions. This is still an
1684 experimental work in progress, stay clear from it to be safe.
1688 - Add new runtime parameters --help-logs and --help-log-categories
1689 to display information about supported logging parameters and
1691 - Old deprecated parameters --{gras,surf,msg,simix,xbt}-log=...
1692 don't exists anymore.
1693 * Mallocators: allow value NULL for the reset function.
1695 - New function xbt_dict_new_homogeneous(void(*)(void*)) to
1696 create homogeneous dictionaries, where all the elements share the
1697 same free function. Non homogeneous dictionaries will be
1698 deprecated in the next release.
1699 - Dicts of scalar elements (xbt_dicti_*) are deprecated.
1700 - Multi-level dictionaries are deprecated.
1702 - new function xbt_dynar_search_or_negative() that is useful when
1703 you have less than 2 million elements in your dynar and don't
1704 want of the extra complexity of catching exceptions when the
1705 element is not found.
1707 - Make xbt_os_thread module (for thread portability) public.
1708 Documentation is still to come, sorry.
1710 - Cleanups and simplifications to make it maintainable again.
1711 - Exotic features (such as memalign and valloc) were removed.
1712 - The metadata were extended and improved so that the
1713 model-checker becomes able to explore and inspect the heaps.
1714 - This may induce a performance drop when enable_model-checking is
1715 ON in cmake (even if it's not used in the simulation), but it is
1716 necessary at this point to get MC working.
1718 Turn model-checking OFF if simulation performance matters to you.
1719 Not enabling it at runtime is not enough, disable it in cmake.
1721 -- Tue May 15 11:30:19 UTC 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1724 SimGrid (3.6.2) stable; urgency=low
1726 The "Not coding new stuff allows to polish old things" release.
1729 * New bindings to the NS3 packet level simulator (experimental)
1730 * Use the raw (efficient) execution contexts instead of the sysv
1731 (portable) ones when possible.
1732 * libpcre is now mandatory in any cases since not using it led to
1733 severe performance loss and possibly other issues
1734 * Update the XML platforms:
1735 - G5K: include the latest machine in Nancy
1736 - GridPP and LCG: new platforms
1737 * Documentation was partially updated, at least (more to come)
1739 Bug fixes, cosmetics and small improvements
1740 * Free terminated processes before the end of the simulation to avoid
1741 exhausting the memory of users having very dynamic amount of
1743 * Bug fix and cosmetics about canceling non-running tasks
1744 * Bug fix about the dot loader's issues when using libcgraph
1747 * Create an installer for windows with nsis (amd64 and win32)
1748 - Add an hello world project to illustrate simgrid project creation.
1749 - Embed libpcre into the Simgrid installer to avoid
1750 its compilation burden
1751 * The raw execution contexts should work on Apple now
1752 * Port to Windows 64 bits
1753 - Sysv contexts now have an implementation for this arch
1754 - GRAS communication features now support this arch
1755 * Drop support for borland compiler on windows
1756 - this code was not maintained, and we kinda depend on gcc nowadays
1757 * Fix portability issues on kfreebsd/gnu: build error about semaphores
1758 * Fix portability issue on unstable ubuntu: linker became picky on
1761 -- Wed Oct 5 15:51:01 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1763 SimGrid (3.6.1) stable; urgency=low
1765 The "Oops, we broke Macs too" release
1768 * Fixed contexts detection so that raw ones are used when possible
1769 * On Mac, do not use Posix Ucontexts with gcc v4.[1-5] since this
1770 leads to a strange error, with user code segfaulting sometimes when
1771 the generated code is not perfectly aligned (which is not
1772 controllable from the user side, depends on the amount of code)
1775 * New macro: CATCH_ANONYMOUS, which is like CATCH(e) but without argument.
1777 -- Mon Jun 27 13:59:03 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1779 SimGrid-java (3.6) unstable; urgency=low
1782 * Split of every thing from simgrid v3.5 into a separate package.
1784 -- 2011-10-05 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1786 SimGrid (3.6) stable; urgency=medium
1788 The Summer Release, also known as the "OMG! They Killed Kenny!" version
1791 * Bindings now constitute their own package, separated from the main one.
1792 Rationale: reduce our maintenance nightmare by reducing the module coupling
1793 They will soon be released on their own on gforge.
1795 svn co svn://scm.gforge.inria.fr/svn/simgrid/contrib/trunk/simgrid-java
1796 svn co svn://scm.gforge.inria.fr/svn/simgrid/contrib/trunk/simgrid-ruby
1798 GRAS: It is not considered as stable anymore, but experimental. Sorry.
1799 * It's not quite deprecated for now because we have no replacement,
1800 but it may soon become the case.
1803 * New MPI functions supported: MPI_Comm_disconnect, MPI_Comm_get_name
1804 * Fortran: New user-level cache variable to store the rank of the running
1805 process. This improves performance by an order of magnitude.
1806 * C: New coccinelle script to automatically locate and modify global and
1807 local static variables.
1808 * Improved SMPI network model with a sender-side gap to account for multiple
1812 * New function MSG_comm_get_status(). MSG_comm_test() and MSG_comm_testany()
1813 only say if a communication is finished, no matter whether it succeeded or
1814 failed. You can call MSG_comm_get_status() to know the status of a finished
1816 * New function MSG_task_dsend() to send a task and detach it. When a
1817 communication is detached, you are never notified of its success or failure
1818 and the memory is released automatically once it is finished. This function
1819 is useful when you don't care about the end nor the success of a
1821 * Change the prototypes of action replay. Sorry for inconvenience,
1822 but this is really more efficient this way (and to adapt your code,
1823 you just have to fix the initialization, that shouldn't be too long)
1824 * Kill the braindead MSG_task_refcount_dec() function. I guess nobody
1825 ever managed to do anything useful with it.
1826 * New function MSG_comm_testany(). Similarly to MSG_comm_waitany(), it
1827 takes a dynar of communications. It returns immediately and gives the
1828 index of a finished communication (if any).
1829 * New example: a basic implementation of the Chord P2P algorithm.
1832 * New model for multi-core CPUs. You can now use the core attribute to
1833 precise the number of cores of a host. This is a basic model. Every
1834 process running on the host receives at most the power provided in
1835 the DTD (throughput<=power). Total throughput of process cannot exceed
1837 * New peer tag. This peer tag creates a tiny AS comprising a host and a
1838 router linked by an up-link and a down-link (possibly asymmetrical).
1839 This kind of pattern allows to easily build last-mile model style platforms.
1840 Aggregating such patterns in a rule-based AS is thus the technique of
1841 choice for modeling large peer-to-peer/volunteer computing/cloud platforms.
1842 * New model for Vivaldi routing. We transformed the Vivaldi network model
1843 into a Vivaldi routing model (based on the rule-based model). This allows to
1844 combine Vivaldi based latencies with last-mile platforms.
1847 * Added a check for NaN of IEEE754 infinite in the double entries of
1849 * Introduce a new context factory "raw", highly inspirated from the
1850 ucontext factory, but using manually crafted functions in assembly to
1851 do the work in an efficient manner.
1852 * Allow to change the used context factory at run time, not only at
1853 compilation time. Use --cfg=contexts/factory:raw for maximal speed.
1854 * Add an option --cfg=contexts/stacksize:N to set the stack size of the user
1855 contexts at runtime (only with raw contexts or ucontexts).
1856 * Completely rewrote this module to allow parallel execution of user
1857 processes. Use --cfg=contexts/nthreads:N to execute user processes
1858 with N parallel threads (the default is 1, meaning no parallelism).
1859 * Allow to decide dynamically between sequential and parallel modes.
1860 When nthreads > 1, you can use --cfg=contexts/threshold:P to run the user
1861 processes in parallel only when their number is greater than or equal to P
1863 * Added a check for NaN of IEEE754 infinite in the double entries of
1867 * New command line option: if you pass --cfg=verbose-exit:0, SimGrid
1868 won't output the state of processes when interrupted with Ctrl-C
1869 * Add a new function xbt_dynar_to_array that transforms a dynar into a
1870 NULL-terminated array. This may solve backward compatibility issues
1871 due to the change to return type of SD_simulate. See also:
1872 http://lists.gforge.inria.fr/pipermail/simgrid-user/2010-December/002206.html
1873 * Add new macros with variable number of arguments.
1874 - in xbt/log.h: XBT_DEBUG, XBT_VERB, XBT_INFO, etc.
1875 - in xbt/asserts.h: xbt_assert
1876 - in xbt/cunit.h: xbt_test_{add,fail,assert,log}
1877 - in xbt/ex.h: THROWF and RETHROWF.
1878 Define XBT_USE_DEPRECATED if you want to use the old numbered macros like
1880 * Change xbt_die() to accept a format string with arguments, just like printf.
1881 * New data structure: xbt_lib_t, like a dict but more general and with better
1885 * New configuration options
1886 Options triva/categorized and triva/uncategorized can be used to generate
1887 graph configuration files for Triva visualization tool.
1888 * Configuration option tracing/platform is renamed to tracing/categorized
1889 * XBT logging makes tracing error checks easier, new root log hierarchy: instr
1890 * New TRACE_user_link_variable interface:
1891 User provides the name of the link and the tracing variable to attach to it
1892 * the declaration of tracing categories must be done after the environment
1894 * simpler tracing interface, just one way to declare categories
1895 TRACE_category or TRACE_category_with_color, it is up to you
1896 * links in the trace file are again identified by their names
1897 * trace contains the full platform hierarchy exactly as declared using the ASes
1898 * Options tracing/msg/[task|process]:1 groups the process by hosts
1899 for both cases, tasks and processes must have names that are unique during the simulation
1900 these options generate traces that are suited to gantt-charts, such as the space-time view of Paje
1901 * The experimental option tracing/msg/volume is deprecated
1902 its functionality may be reincorporated if needed
1904 The tracing generates a trace file with unordered timestamped events,
1905 because of the way the core simulator (surf) works. A script available
1906 at the tools directory (fix-paje-trace.sh) can be used to put the events
1907 in order. We have changed the tracing so it can generate ordered timestamped
1908 events in the final trace, but depending on the simulator (and how much time
1909 is simulated) that can lead to a huge memory utilization. It is deactivated
1910 by default, but it can be activated using the --cfg=tracing/buffer:1 switch.
1912 Build Infrastructure
1913 * Define a SIMGRID_VERSION macro in simgrid_config.h.
1914 - We are trying hard to keep the API stable, but it may happen that
1915 some things change (we're a research project after all, not a
1916 nuclear plant operating system). If such things should happen, you
1917 could rely on that macro to adapt.
1918 - current value: 30600 for 3.06.00, aka 3.6
1919 * Define macro MAKE_SIMGRID_VERSION(major, minor, patch) to help building
1920 a number that can be compared with SIMGRID_VERSION.
1921 * Add a build option -Denable_debug (set to ON by default): when set to OFF,
1922 assertions and verbose/debug logging events are disabled at compile time.
1924 -- Tue Jun 21 08:57:43 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1926 SimGrid (3.5) stable; urgency=medium
1929 * New feature to any SimGrid-based simulator: Model-Checking
1930 Check SIN#1 for more details.
1933 * New Model SMPI (three-interval linear regression for correction factors)
1934 See RR-7426, available at http://hal.inria.fr/inria-00527150
1935 * Ability to use FORTRAN MPI code (through f2c, automatically privatized)
1936 * New MPI functions supported: MPI_Get_count(), MPI_Comm_split()
1937 * New: RAM folding (see RR-7426 and examples/smpi/NAS/DT-folding)
1938 * New: execution sampling (see RR-7426 and examples/smpi/NAS/EP-sampling)
1939 * See also src/smpi/README
1944 - Tracing API changes: TRACE_start and TRACE_end should not be called
1945 by user-code. They are automatically called by simulators created
1946 with SimDAG, MSG and SMPI if the toolkit is compiled with
1947 tracing_enabled=ON. Categories declaration and utilization remain the
1948 same for MSG and SimDag.
1949 - A function was added to the tracing API to declare categories with
1951 - TRACE_category_with_color (char *category, char *color)
1952 where color must be in the following format
1953 "%f %f %f", red, green, blue
1954 and red, green, blue are float values in the interval [0, 1]
1955 - User can specify NULL as color parameter, or continue calling
1956 TRACE_category (cat)
1957 On that case, the tracing system will define random colors
1958 - The following command-line options are supported:
1959 --cfg=tracing/filename:msg.trace
1960 --cfg=tracing:1 (activate tracing, needed to use others)
1961 --cfg=tracing/platform:1 (categorized resource use)
1962 --cfg=tracing/uncategorized:1 (uncategorized resource use)
1963 --cfg=tracing/msg/task:1 (task creation)
1964 --cfg=tracing/msg/process:1 (process creation, migration)
1965 --cfg=tracing/msg/volume:1 (volume of MSG send/recv)
1966 --cfg=tracing/smpi:1 (SMPI interface tracing)
1967 --cfg=tracing/simdag:1 (allow SimDAG tasks receive categories)
1968 - examples of examples/msg/tracing updated
1970 - DAXLoader and DOTLoader functions can generate tasks with categories
1971 - A new function to attribute a category to SD tasks:
1972 TRACE_sd_set_task_category (SD_task_t task, char *category)
1973 * Tracing the MPI interface implemented by SMPI
1974 - Collective operations are traced with states
1975 - Point-to-Point operations are traced with states/links
1976 - Tracing activated by a parameter "-trace filename" passed
1977 to smpirun during execution (considering that simgrid
1978 is compiled with tracing enabled)
1979 - To run the simulation with gdb, the simulator
1980 accepts --cfg=tracing/smpi:1 to trace SMPI
1981 - tesh files to check if smpi tracing is ok
1982 - See examples/smpi/NAS/DT-trace
1983 * GTNetS tracing re-worked
1984 - adaptation to the tracing system of GTNets to cope
1985 with modifications regarding the fullduplex mode
1986 - new tesh files to check if gtnets tracing is ok
1989 * Asynchronous communications through the functions:
1990 MSG_task_isend/irecv and MSG_comm_test/wait/waitall
1991 * New function: MSG_load_platform_script()
1992 to make possible using a lua script instead of XML files to set up platforms
1993 * New function: MSG_set_function
1994 to associate functions to processes, used when bypassing the parser
1995 * New functions: MSG_task_set_name(), MSG_task_set_compute_duration()
1997 Platforms: Add some more examples in examples/platforms
1998 * Grid'5000: see www.grid5000.fr
1999 * *_30000_hosts.xml: various huge files [mainly scalability testing]
2002 * Change the XML format. This is a very important modification. SimGrid
2003 3.5 introduces a new hierarchical format based on the notion of
2004 Autonomous Systems. Compatibility with old format is ensured
2005 through the perl script provided in the install bin directory
2006 bin/simgrid_update_xml.
2007 It is now possible to build platforms with specific routing
2008 mechanism (Full/Dijkstra/DijkstraCache/Floyd) and to easily
2009 connect several platforms together. We will try to provide soon
2010 set of realistic platforms exploiting these properties (have a
2011 look at examples/platforms/ for the moment).
2012 * Take the opportunity of the XML format change to be a good XML citizen:
2013 rename link:ctn to link_ctn and similar changes (also dealt with by
2015 * Add a new routing scheme (rule-based) using regular expressions. It
2016 enables to have an extremely low memory footprint when the
2017 underlying routing is simple and can be compactly described. You
2018 need to have libpcre4-dev (perl regular expressions) installed if
2019 you want to use this routing scheme.
2020 * Revive the cluster TAG and allow to easily and efficiently (both in
2021 term of memory and speed) connect clusters together. Have a look
2022 at teshsuite/simdag/platforms/ to see how this can be done. With
2023 this tag, you can create clusters with thousands of tasks at no
2024 cost (have a look at examples/platforms/).
2025 Note: clusters are implemented as ASes, so there is no need for an
2026 enclosing AS tag if you have only one cluster in your platform.
2027 * Add new generic functions in the public interface that allows the user
2028 to call SURF 'create_resource' methods from your code (same
2029 functionality as the XML bypass mechanism but with a much lighter
2031 * Add a new model (enabled through command line --cfg=network/model:SMPI)
2032 that uses a piecewise linear approximation to produce better
2033 results when exchanging small messages.
2034 * Add a new parameter to handle correctly full duplex link and account
2035 for interferences between uplink and downlink communications
2036 (activate with --cfg=fullduplex:1).
2039 * Rename the SD_READY (all dependencies are satisfied and task is
2040 scheduled) state in SD_RUNNABLE and define a new SD_SCHEDULABLE (all
2041 dependencies are satisfied) state.
2042 This prevents a confusion between the notion of "ready to schedule"
2043 (SD_SCHEDULABLE) used in DAG scheduling and that of "ready to be
2044 simulated" (SD_RUNNABLE) used by the simulation kernel.
2045 * Change the way a task is considered as ready. Instead of removing
2046 dependencies when a task is done, a counter is decreased. This way,
2047 it is always possible to reach ancestors thanks to the
2048 SD_taks_get_parents function (even after the end of the simulation.)
2049 * Change the return type of SD_Simulate from (SD_task_t*) into
2050 xbt_dynar_t. This function was in handling a dynar internally and
2051 converted it into a NULL terminated array for historical reasons.
2052 * New function SD_dotload(char*) to load a DAG described in dot
2053 format. This loader and the corresponding examples require the
2054 installation of the graphviz library.
2055 * Fix a bug in the management of tasks of size 0 in the surf network
2056 models. This problem was only visible with SIMDAG and you should
2057 thus disregard results produced with earlier versions if you
2058 relied on this feature (some tasks were blocked because of this).
2059 * Fix a bunch of stuff that prevented to use classical models with SIMDAG
2060 even though your applications were doing only point-to-point
2061 communications and sequential computations. Now you can really use any
2062 model you want (of course, if you create real parallel tasks, which are
2063 not implemented in most models beside ptaskL07, this will abort).
2064 * Add an example that schedules a DAX on an heterogeneous platform
2065 using a Min-Min strategy.
2066 * New function SD_workstation_get_current_task() that returns the kind
2067 of task currently running on a workstation in the sequential access
2069 * Raise some warnings when unexecuted tasks remains at the end of the
2070 simulation. This is usually caused by cycles in the DAG.
2073 * New function: SIMIX_process_set_function() called by MSG_set_function
2074 * Change the underlying waiting queue in semaphores so that a process
2075 can wait on several of them simultaneously (as in waitany).
2076 * Fix the way to handle tokens in semaphores so that all access patterns
2077 work: {acquire, acquire_timeout, waitany} / {release, release_forever}.
2078 * kill the dirty pimple SIMIX_message_sizes_output()
2079 Please use (proper) visualization instead
2082 * New data container: setset (set of sets of elements)
2083 * New module: mmalloc (mapped malloc, allowing to have several
2084 independent segments of malloc)
2085 * New function: xbt_dict_cursor_set_data()
2086 * New functions: xbt_dynar_sort(), xbt_dynar_compare()
2087 * New function: xbt_dynar_is_empty()
2088 * New function: xbt_fifo_get_last_item()
2089 * Fix xbt_dynar_shrink(): use the right element size.
2090 * Fix xbt_dynar_set*(): allow index larger than current size and memset 0
2091 uninitialized areas during expand.
2092 * Fix semaphores: previous implementation was severely broken.
2093 * Use library init/fini functions for our initialization.
2094 - you can use logs and other feature as soon as you want in your
2095 code (even before the xbt_init / MSG_init)
2096 - xbt_exit is now a no-op and produce a warning when used.
2099 * Port GRAS to new SIMIX mechanisms. This allows gras users to
2100 benefit from the latest improvement to the simulation kernel.
2101 * Kill measurement sockets for now. If you rely on them, sorry. This
2102 release is not for you. This feature will be reintroduced in the
2103 future, but we cannot delay the release any further.
2104 * New function: gras_msgtype_get_name().
2105 * Implement gras_agent_spawn in RL too (the prototype changed a bit)
2106 * Fix (at last) the pmm example: it should not randomly fail anymore.
2108 Build chain: bug fixes and overall polishing
2109 * Cmake is now stable enough. Hence, we killed the autotools.
2110 * Port to windows ( TM :)
2111 * Fix the 'make install' target.
2112 No need to use 'make install-simgrid' anymore
2113 * Introduce a 'make dist' target compiling a *source* archive
2114 'make package' compiles a binary archive
2115 * Compile java files only on need
2116 * Add --cd and --setenv command line options to tesh
2117 * Out of source builds are not fully supported yet, but we are close
2118 * Enable supernovae and optimization flags by default for our users
2121 * Add layer to set up environment directly from lua, without XML.
2122 * The effect of gras_stub_generator can be achieved through
2123 lua too (check examples/gras/console/ping_generator.lua)
2125 -- Wed, 01 Dec 2010 22:09:23 +0100 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
2127 SimGrid (3.4.1) stable; urgency=low
2129 The "Polishing easter eggs is probably a good idea" release.
2130 This is a bug fixes release only.
2134 * Fix a bug preventing the tasks from begin garbage collected.
2137 * Fix a bug occuring when a host involved in a communication fails.
2138 This was not detected properly by the other peer involved in the
2139 communication. Now, it's reported as a network error.
2142 * Warn the user about loop dependencies in data flow of DAX files
2143 * Obey the control-flow dependencies of DAX files
2146 * Add option "enable_smpi" allowing to not compile SMPI.
2147 Probably useful for the (Mac) users experiencing a build error here
2148 * Improve the detection of lua5.1 and ruby1.8
2150 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Tus, 04 May 2010 28 16:11:16 +0100
2152 SimGrid (3.4) stable; urgency=low
2154 The "Easter in Cargese" release. Also known as (major changes):
2156 * the "se habla Java, Ruby 話せます, fala-se Lua (and deaf-friendly)"
2157 ~> bindings were greatly improved
2158 ~> new tracing infrastructure for better visualization introduced
2160 * the "Welcome to configury modernity" release.
2161 ~> we switched from autotools to cmake, and improved our cdash
2164 A more detailled list of changes follow (full detail in svn log).
2166 Java Bindings: Various Cleanups
2167 * (install java-gcj-compat-dev on debian-like to use them)
2168 * Remove put/get: no need to export deprecated interface in Java
2169 Use send/receive instead.
2170 * Cleanup the examples and add a README per directory
2171 * Remove example autoDestination (that's the only way to go now)
2172 * Remove example explicitDestination (was a plain copy of basic)
2173 * Make JniException a runtime exception, so that there is no need to
2174 declare the fact that you may encounter such a beast. I guess that
2175 nobody will ever want to survive such error.
2176 * Create specific errors for each MSG case of failure:
2177 host failure, transfer failure, timeout, task cancelled
2178 * Cleanup the exceptions that may get thrown by each function
2179 * Other internal cleanups in Java bindings. Performance still bad :/
2180 Ruby and Lua Bindings: create them
2181 * (install ruby1.8-dev/liblua5.1-0-dev on debian-like to use them)
2182 * That's new and great, you should try them out.
2183 Same functionalities than Java bindings, only even less polished
2185 * Kill the useless "rate" argument of SD_task_get_execution_time()
2186 Everyone used to provide -1 as a value, it was not used, and the
2187 semantic of a possible use wasn't even clear.
2188 * SD_SCHED_NO_COST: Constant to use as cost in SD_task_schedule()
2189 either as comm costs or compute costs to mean that there is no
2190 such thing for that specific task.
2191 * Add a SD_task_set_name() function
2192 * Fix SD_task_unschedule() on typed tasks
2193 * Fix SD_task_get_execution_time() to return seconds, not flop*sec
2194 * In DAX loader, accept useless 'level' attributes to <job> since
2195 LIGO DAGs have them (seem to be to ease graphical representation).
2197 * Add an example masterslave_mailbox.c using send/receive and not
2198 the deprecated put/get interface.
2199 * Kill the MSG_paje_output() function. It's a noop since 2 years.
2200 * Kill MSG_WARNING and MSG_FATAL return codes: they were not used
2202 * Rename MSG_TIMEOUT_FAILURE into MSG_TIMEOUT for sake of logic
2203 (declare MSG_USE_DEPRECATED to still have the old name)
2204 * Add a MSG_task_set_data() function
2205 * About trace replay (see examples/msg/actions):
2207 - Allow to work with splitted trace files for each process
2208 Give the specific trace file as argument of each process,
2209 and call MSG_action_trace_run(NULL)
2210 You can still have one merged file for all processes.
2211 - Fix implementation of collective operations
2212 * Allow task_execute() on 0-sized tasks (closes #10063)
2214 * This is the first release of SimGrid where SMPI is not considered
2215 beta anymore (even if some corners should still be improved)
2216 * Port over the new SIMIX_network submodule (internal refactoring)
2217 * Basic support to log events as with SMPE (use --cfg=SMPE:1)
2218 * Implement more missing elements of the standard:
2220 - MPI_MAXLOC MPI_MINLOC + all associated datatype MPI_DOUBLE_INT,
2222 - MPI_Address() MPI_Get_count() MPI_Type_free() MPI_Type_extent()
2223 MPI_Scan() MPI_Get_processor_name()
2224 - Added implementation of missing case for Alltoall (warning: it's
2225 *not* the bruck variant from OpenMPI; based on Alltoallv instead)
2226 - SMPI_MPI_Gather() SMPI_MPI_Gatherv() SMPI_MPI_Scatterv()
2227 SMPI_MPI_Reduce_scatter() SMPI_MPI_Allgather()
2228 SMPI_MPI_Allgatherv()
2229 * Bug fixes include:
2230 - MPI_Waitsome() was broken
2231 - Allow relative includes in smpicc
2232 - Command line cfg argument 'reference_speed' was ignored...
2233 - Some functions did not properly lead to auto-benching of user code
2234 - smpicc passes -O2 by default (just like openmpi one)
2236 * add SIMIX_action_suspend() and SIMIX_action_resume() functions
2237 * Bug fixes about timeouts during communications
2238 * add SIMIX_message_sizes_output() as a pimple to write to file the
2239 amount of messages per size. Use gnuplot to get histogram.
2240 Pimple because that's the only user-visible function of simix,
2241 defined directly in xbt.h (irk, sorry)
2243 - Add a SIMIX_sem_get_capacity() function
2244 - Fix interactions with processe resume/suspende
2245 - release_forever() was stupidly broken
2246 - Fix SIMIX_display_process_status() for processes in a semaphore
2247 - Make SIMIX_sem_block_onto() user-visible
2248 * Refactoring context stuff:
2249 - Use pseudo-OOP for better modularity
2250 - reimplement SIMIX_process_kill() without process_schedule() so
2251 that the latter can take as invariant that it is called from
2253 - Merge context_start into context_new for sake of simplicity
2255 * Add a Vivaldi network model, coded live during SUD'10 ;)
2256 * Rename configuration variables to start a hierarchy:
2257 o cpu_model -> cpu/model
2258 o network_model -> network/model
2259 o workstation_model -> workstation/model
2260 * New configuration variables:
2261 o network/bandwidth_factor: correction to bandwith
2262 o network/latency_factor: correction to latency
2263 o netwotk/weight_S: correction to the weight of competing streams
2264 * Add a long description to the models, that users can see with such
2265 argument on the command line: --cfg=cpu/model:help
2266 * --help-models display the long description of all known models
2268 * config: add the ability to set a default value after registration
2269 Does not override any previously set value (e.g. from cmd line)
2270 * dict: allow to have integer key and data.
2271 When so, you need to use the following functions
2272 void xbt_dicti_set(xbt_dict_t dict, uintptr_t key, uintptr_t data);
2273 uintptr_t xbt_dicti_get(xbt_dict_t dict, uintptr_t key);
2274 void xbt_dicti_remove(xbt_dict_t dict, uintptr_t key);
2275 In contrary to regular dicts, the key is not malloced before copy.
2276 Mixing scalar and regular elements in the same dict is not tested
2278 * Allow to use xbt_dynar_shrink() to expend the dynar instead
2279 Tracing for Visualization:
2280 * SimGrid is now instrumented in order to generate a trace file for
2281 visualization analysis: to use it, need to compile SimGrid with the
2282 "tracing" option enabled, and instrument the program using SimGrid with
2283 TRACE_start, TRACE_category, TRACE_msg_set_task_category and TRACE_end
2284 (among other functions).
2285 * The instrumentation only traces the platform utilization for now
2286 * Documentation to use the tracing functions and how to analyze the
2287 traces with the Triva tool is written.
2288 * More information about: SimGrid FAQ (in the section Tracing Simulations
2291 * We moved to cmake as default build system. Autotools support will
2292 be dropped soon. Check the FAQ for more info about how to use it.
2293 * Greatly improved our cdash/ctest interactions
2294 Check http://cdash.inria.fr/CDash/index.php?project=Simgrid
2295 * Added memory checking tests with valgrind; lot of memleak fixing.
2296 This may be the first release of simgrid with so few memory issues
2297 * Added code coverage tests.
2298 Our coverage is still improvable, but at least we see it on cdash.
2300 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Wed, 28 Apr 2010 28 17:11:16 +0100
2302 SimGrid (3.3.4) stable; urgency=low
2304 The "Desktop Grid needs love too" release (also called Xmas release).
2306 Models improvements:
2307 * Major speedup in the maxmin system solving by using lazy evaluation
2308 Instead of solving completely the maxmin system at each iteration,
2309 only invalidate (and recompute) the modified parts.
2310 This new feature is enabled in default models but you can try to
2311 turn it on with "--cfg:maxmin-selective-update=1" for other models.
2312 * Cas01 IMproved as default CPU model
2313 This CPU model is the same Cas01 model, but it uses the
2314 maxmin-selective-update flag and a heap structure to manage
2315 actions on SURF kernel.
2316 It reduces the complexity to find the next action to finish and,
2317 consequently, it's faster than the old Cas01.
2318 This is the new default CPU model (Cas01).
2319 * Rename the old Cas01 model to Cas01_fullupdate
2320 Keep the old cpu model Cas01 with the new name of Cas01_fullupdate.
2321 Use "--cfg=cpu_model:Cas01_fullupdate" to use the old default CPU model.
2322 * CpuTI (CPU Trace Integration)
2323 A new CPU model whose objective is simulate faster when using
2324 availability trace files.
2325 Instead of using a full featured, over engineered maxmin system for
2326 CPU modeling, this model does the pre-integration of traces files
2327 to calculate the amount of CPU power available, and so, executes
2328 faster than the old CPU models.
2329 Use "--cfg=cpu_model:CpuTI" to change to this CPU model.
2330 * Use LV08 as default network model since it gives better accuracy
2331 for small messages and shouldn't change things for big ones.
2332 Use --cfg=network_model:CM02 to get the previous behavior.
2335 ******************************************
2336 *DO NOT MIX 3.3.4 RESULTS WITH OLDER ONES*
2337 ******************************************
2338 * The new CPU model may changes simulations!
2339 The point is that events occurring at the exact same timestamp
2340 are not scheduled in the same order with the old and new
2341 version. This may be enough to completely change the execution
2342 of simulations in some cases.
2343 * The new network model will change simulations!
2344 This new model is more realistic than the previous one, so you
2345 should consider redoing your old experiments with this model.
2346 Sorry for the inconvenience.
2349 * Introduce the supernovae compilation mode
2350 When compiled that way, the whole SimGrid (or almost) is put in a
2351 single compilation unit and compiled in one shoot.
2352 This is to help gcc which has difficulties to inline stuff from one
2354 The speedup seem to be above 15%, althrough more tests are needed on
2355 amd64 to confirm that gain.
2358 * Port of MSG's mailbox on top of SIMIX network
2359 The put/get mechanism was greatly simplified on the way.
2362 * New SIMIX network module. Provides:
2363 - Mailbox: rendez-vous mechanism to find with who you want to speak
2364 - Synchronous send/recv: easier and hopefully faster since the
2365 logic is handled in the maestro process directly now
2366 - Asynchronous send/recv: you dreamt of it? It's here now
2367 Too bad that nobody cared enough to propagate the change to MSG.
2368 * Add semaphores as SIMIX synchronization mechanism.
2371 * new function SD_daxload(char*) to load a DAX file
2372 (see http://vtcpc.isi.edu/pegasus/index.php/WorkflowGenerator)
2373 * Introduce typed tasks. Specify its kind and cost at creation.
2374 At scheduling, just give where it should be placed, and the cost
2375 for each involved resource is automatically computed.
2376 Existing constructors so far (more to come of course):
2377 - SD_task_create_comm_e2e() for end-to-end communication
2378 - SD_task_create_comp_seq() for sequential computation
2379 Use SD_task_schedulev() / SD_task_schedulel() to schedule them.
2380 * new function SD_task_dump() for debuging display
2381 * new function SD_task_dotty(task,FILE*) writing to file the info
2382 about the task in dotty format
2383 * SD_task_dependency_exists() can now cope with having one of its
2384 arguments NULL. If so, it tests whether the other argument has any
2386 * Add getters on list of preceding/following tasks:
2387 SD_task_get_parents(task) and SD_task_get_children(task)
2388 * Add getters on amount of workstations and list:
2389 SD_task_get_workstation_count(t) and SD_task_get_workstation_list(t)
2390 * Add getter on task kind: SD_task_get_kind(task)
2391 * Update the start_time and finish_time of tasks on completion/failure
2392 * Bugfix: Remove task from state swags when destroyed
2395 * New function: void gras_cpu_burn(double flops) -- a simple CPU burner
2398 * New function: xbt_dynar_dopar(dynar,fun) to map a function over the
2399 dynar with one separate thread per value of the dynar.
2400 * Change the prototype of xbt_thread_create(), sorry.
2401 Added a boolean parameter indicating whether we want to join this
2402 thread (used in SG only for now)
2403 * Implement xbt_thread_join and xbt_thread_yield in SG also.
2406 * GTNetS wrappers should now be usable again (and betterly tested too)
2407 * Fix a major regression from 3.2 where the timeout provided to
2408 MSG_task_put_with_timeout() was used as absolute time before which
2409 the comm should be done.
2410 * Start to fix the <cluster> tag.
2411 - Internal links should be good now (beside of the loopback, which
2412 use the private link instead)
2413 - paths to the external world is still rather broken
2414 - the <route:multi> tag is just broken. Actually that's brain-dead.
2415 We need sth like <route:multi src="myCluster" dst="$*-${myCluster}">
2416 to make it less stupid
2417 ** Check your platform with teshsuite/simdag/platforms/flatifier **
2418 * Fix a source-level compatibility glitch from 3.2: after defining
2419 MSG_USE_DEPRECATED, you can use the old name
2420 MSG_task_put_with_time_out() for MSG_task_put_with_timeout()
2421 * Allow to compile from the SVN with automake 1.11
2422 * Fix some problems when using the "start_time" tag in deployment XMLs.
2423 * Fix #8569: XBT/synchro.h has redundant declarations
2424 * Fix #8563: MSG return values and exceptions
2425 Introduce a MSG_TIMEOUT_FAILURE return code and use it consistently.
2426 * Integrate patch #8636: Obey DESTDIR when installing documentation.
2427 Thanks to Robson Peixoto.
2428 * Fix a vicious bug in dictionaries inducing that some elements were
2429 not freed on xbt_dict_free()
2431 Portability report of this version:
2432 * Main portability targets:
2433 - linux (ubuntu (804/810/910) /debian (4/5/testing) /fedora (core11))
2434 on (amd64/i386/ia64)
2435 - mac leopard on i386
2436 Known problems: http://cdash.inria.fr/CDash/index.php?project=Simgrid
2437 but nothing critical.
2438 * Other platforms: windows, AIX and others were not tested for this release
2440 Timing report of this version:
2441 * Lazy evaluation brings arbitrary speedup (ie, speedup depending on
2442 scenario parameters). From 8h to a few seconds in desktop grid settings.
2443 * Supernovae brings about 25% speedup on i386.
2445 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 24 Dec 2009 19:07:39 +0100
2447 SimGrid (3.3.3) stable; urgency=low
2449 The "Need for Speed" release.
2451 The timings done to validate the 3.3.2 were faulty.
2452 Instead of being 5% faster, it was 15% slower (compared to 3.3.1).
2454 The problem was a conversion from a manually handled vector to
2455 xbt_dynar_t on the critical path.
2456 xbt_dynar_foreach calls functions, inducing stack management crap.
2458 We inlined these functions and xbt_dynar_foreach is now breath taking.
2459 We also inlined xbt_swag_belong on the way.
2461 Here are some approximate speedup measurements (on master/slaves
2462 simulations lasting between 10s and 20s each):
2463 3.3.1 -> 3.3.2: about same performance
2464 3.3.2 -> 3.3.3: 40% speedup
2465 3.3.1 -> 3.3.3: 40% speedup
2466 3.3.1 with inline patch -> 3.3.3: 30% speedup
2468 Our reading is that the refactoring which occurred in 3.3.2 made us
2469 suffer much more from the xbt_dynar_foreach low performance, but
2470 once we solved this, this refactoring proved to be very performance
2471 effective. From the 40% speedup, somehow, 10% are due to the
2472 inlining and 30% to the refactoring.
2474 That's a pitty that gcc cannot inline functions placed in other files
2475 alone. We have to choose between:
2476 - break the encapsulation (by putting private data structures and
2477 accessors in headers files to help gcc)
2478 - live with low performance
2479 - switch to a decent compiler such as icc (not quite possible).
2481 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 20 Aug 2009 21:21:33 +0200
2483 SimGrid (3.3.2) stable; urgency=low
2485 The "Simplicity does not preceed complexity, but follows it" release.
2487 The main contributors of this release were (lexical order):
2488 Silas De Munck, Stéphane Genaud, Martin Quinson, Cristian Rosa.
2491 * Extract the routing logic into its own object.
2492 (was dupplicated in network.c and workstation_LV07.c;
2493 Allows to implement other ways of storing that info)
2494 => kill now useless network_card concept
2495 - Use dynar to represent routes (instead of void** + int*)
2496 - kill link_set (use surf_network_model->resource_set instead)
2497 - Add a command-line option to choose the routing schema to use
2498 - Add three new models:
2499 * Floyd (shortest path computed at initialization)
2500 * Dijikstra (shortest path recomputed all the time)
2501 * Cached Dijikstra (shortest path computed on need)
2502 All these models where contributed by Silas De Munck, and are
2503 described in his ICCS09 paper.
2505 * Simplify model declaration
2506 (less redirections, less function to write when defining a model)
2507 - Factorize stuff between models:
2510 surf_model_resource_set(model)
2511 surf_model_resource_by_name(model, name)
2512 - Unify the types of models in s_surf_model_t (using an union)
2513 - Embeed fields of common_public directly into s_surf_model_t
2514 - Rename model methods:
2515 action_free ~> action_unref
2516 action_change_state ~> action_state_set
2517 action_get_state ~> action_state_get
2518 - Change model methods into functions:
2519 (model)->common_public->action_use ~> surf_action_ref
2521 * Implement a generic resource; use it as ancestor to specific ones
2522 (allows to kill duplicated code in models)
2523 Drawback: timer command don't need no name nor properties;
2524 workstation_CLM03 don't need no properties
2525 (but I guess we can live with those few bytes wasted)
2527 * Improve the action object model
2528 - implement a constructor avoiding dupplicated code about field
2529 initialization in generic_action part.
2531 * Kill the SDP model: it has an external dependency, is deprecated
2532 in flavor of modern lmm models, and didn't compile since a while
2535 * Relocation of the context module from XBT to SIMIX.
2536 (the context were decoupled from the simix processes, duplicating a lot of code)
2537 => a lot of code was factorized
2538 - less overhead is introduced during scheduling
2539 - simpler API for the context factory
2540 - the logic for process creation,destruction and manipulation was simplified
2541 * Simplification of the s_smx_process_t data structure.
2542 => accesing the simix level data associated to a process is faster now,
2543 and the code is a lot more readable.
2546 * Implement some more MPI primitives:
2547 MPI_Bcast, MPI_Waitany, MPI_Waitall, MPI_Reduce, MPI_Allreduce, MPI_Scatter, MPI_Sendrecv, MPI_Alltoall
2548 -implementation: Bcast: flat or 2-ary tree (default),
2549 Barrier: 4-ary tree,
2551 Allreduce: Reduce then Bcast
2552 Alltoall: "basic_linear" if data per proc < 3Kb, "otherwise pairwise".
2553 Not yet implemented: "Bruck" for data per proc < 200b and comm size > 12
2554 Alltoallv: flat tree, like ompi
2556 * Add support for optimized collectives (Bcast is now binomial by default)
2557 * Port smpirun and smpicc to OS X
2560 * Kill SD_link_get_properties: hard to maintain and makes very little sense
2561 Shout out if you used it.
2564 * Display the list of still queued messages in SG mode when existing
2568 * Add xbt_set_get_by_name_or_null() [Silas De Munck]
2569 * Add xbt_graph_node_get_outedges() [Silas De Munck]
2570 * Add xbt_str_from_file(FILE*)
2571 * Add xbt_dict_get_key achieving a linear reverse search
2572 * Remove the context module
2574 Portability report of this version:
2575 * Main portability targets:
2576 - Linux(debian)/x86/context
2577 - Linux(debian)/x86/pthreads
2578 - Linux(debian)/amd64/context
2579 - Linux(debian)/amd64/pthreads
2580 On these, we still have the eratic breakages of gras/pmm and
2581 amok/saturate_sg reported in previous version. We still think
2582 that the tests are the cause of the fault, not the tested code.
2584 - Mac OSX Leopard/x86/context
2585 Still false negative in tesh autotesting.
2586 Smpi still fails, but this time because readlink does not accept -f
2587 Everything seems to work properly beside of that.
2590 - AIX version 5.3 (only tested contexts this time)
2591 Smpi still fails there because mktemp is not installed.
2592 Everything seems to work properly beside of that.
2594 I managed to compile it for the first time, but several breakages.
2595 Won't delay the release for this exotic platform.
2597 * Windows: it's still lagging behind. If you want to help, please
2600 Timing report of this version:
2601 This version seem to be more than 5% faster than 3.3.1 (on linux
2602 64bits with contextes). The gain is less than expected, we are
2603 investigating this for next release.
2605 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Wed, 19 Aug 2009 17:07:12 +0200
2607 SimGrid (3.3.1) stable; urgency=low
2610 * Implement a --cfg-help to show existing configuration variables
2611 * Build chain do not require doxygen in maintainer mode
2614 * fix a bug on struct sizeof computation, which prevented the
2615 exchange of arrays of structs in some conditions
2616 - added a regression test about this in datadesc_usage
2617 * Allow the exchange of 0-long dynamic vectors.
2618 - for that, use -1 as indicator of dynamic size instead of 0
2619 - This implied to change any size from unsigned long to long,
2620 reducing a bit communication abilities, but I guess that with
2621 64bits being quite common, this is more than enough.
2622 - This also induce a protocol change, thus bumping network protocol
2623 version from 0 to 1 (if we have external users, we have to get
2624 clean on that point too ;)
2625 - added two regression tests about this in datadesc_usage
2626 * Be more verbose when propagating local exceptions
2627 This helps debugging.
2628 * Display the status of simulated processes when receiving SIGINT in
2632 * Allow to control the simulation from a trace file.
2633 New functions MSG_action_register() and MSG_action_trace_run()
2634 The first one allows to associate a function execution to each
2635 kind of action while the second one parses a trace file and
2636 triggers the corresponding actions within the system.
2637 For now, only a toy example is provided in examples/msg/actions
2638 * Add an exemple of process migration in examples/msg/migration
2639 * Fix a bug in task exchange which broke MSG_task_get_sender()
2640 Add a teshsuite regression test for that.
2641 [Bug: if MSG_task_get_sender() is called after sender exit,
2643 * Fix a bug which prevented suspend/resume to work properly
2644 * Display the status of simulated processes when receiving SIGINT
2645 This fixes a regression of v3.3. due to the introduction of SIMIX
2646 * Bug fixing in failure management:
2647 - trace could not start by a failure at time 0
2648 - failure during communications were not working
2651 * Add SIMIX_process_set_name() to change the name of the current
2652 process in the log messages.
2653 * Store smx_hosts in a dict since we only retrieve them by name
2654 * Move the configuration infrastructure to surf
2657 * Move the configuration infrastructure to surf
2660 * Massive internal cleanups:
2661 - Store internal structures on processes instead of hosts (allows
2662 to have more than one process per host, in addition of being more
2664 - Cleanup the initialization/finalization process
2665 - Kill a whole bunch of unneeded synchronization:
2666 processes run in exclusive manner within the simulator
2667 - Move queues from global tables to process data fields
2669 - now accept -platform and -hostfile arguments
2670 - Pass the right rank value to processes according to the hostfile
2671 * Compile the examples by default, and use them as regression tests
2672 * Implement MPI_Wtime()
2673 * Change the reference speed to a command line option
2676 * TCP_gamma can now be specified as command line option using
2677 --cfg=TCP_gamma:10000000.0
2678 * Change the --surf-path cmd line option into --cfg=path:
2681 * Also include strbuff from xbt.h public header
2682 * xbt_ex_display(): do not free the exception after displaying
2683 This allows to do more with the given exception afterward.
2684 Users should call xbt_ex_free() themselves.
2688 Portability report of this version:
2689 * Main portability targets:
2690 - Linux(debian)/x86/context
2691 - Linux(debian)/x86/pthreads
2692 - Linux(debian)/amd64/context
2693 - Linux(debian)/amd64/pthreads
2694 These targets fail about 1/10 of times on gras/pmm, but we believe
2695 that this is because of the test, not because of simgrid.
2696 amok/saturate_sg fails even more rarely, and the test may not be
2699 - Mac OSX Leopard/x86/context
2700 The test suite still spits tons of errors because some obscure
2701 force prevents us from removing the temporary directories
2702 arguing that they still contain some metadata I've never heard of.
2703 Smpi fails because seq is not installed.
2704 Everything seems to work properly beside of that.
2707 - AIX version 5.3 (both contexts and pthread)
2708 Smpi still fails there because mktemp is not installed.
2709 XML inclusions seems rosty on AIX.
2711 * Windows: it's still lagging behind. If you want to help, please
2714 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Sat, 27 Jun 2009 00:14:30 +0200
2716 SimGrid (3.3) stable; urgency=high
2720 * JAVA BINDINGS for MSG (you dreamt of them? We made them)
2721 [Malek Cherier & Mt]
2723 * Introduce the SIMIX module: factorize code between MSG and GRAS.
2726 Until now, GRAS were using MSG as an interface to SURF. It was
2727 quite difficult because both interface have several differences
2728 (MSG channels vs GRAS sockets were the most notable point).
2730 This also opens the gate to SMPI (which should occur soon) and speed
2731 up simulations by to 40% (even if it were not the main goal).
2733 **************************************
2734 *DO NOT MIX 3.2 RESULTS WITH 3.3 ONES* Simix may changes simulations!
2735 **************************************
2736 The point is that events occuring at the exact same timestamp are
2737 not scheduled in the same order with the old and new version. This
2738 may be enough to completely change the execution of simulations in
2739 some cases. Sorry for the inconvenience.
2741 * Cleanup and upgrade the XML format to push further scalability
2742 issues (check http://hal.inria.fr/inria-00256883/ for more info)
2744 * Improve the testing infrastructure with tesh. Now a very large part of
2745 the code is tested not only by being run but also by checking that the
2746 output match an expected output [Mt].
2748 * Move on to FleXML v1.7 for the embeeded XML parsers. This version
2749 is really less memory-demanding, which should allow you to use
2750 larger files in SimGrid [AL].
2752 * Inform valgrind about our contextes, so that it becomes usable
2753 with the default (and more effecient) version of SimGrid
2754 [contributed by Sékou Diakite, many thanks]
2757 * Introduce a listener thread in charge of receiving incoming
2758 messages from the network. It allows to overlap communication and
2759 computation but most notably, it removes some stupid deadlocks due
2760 to the fact that so far, a process could not send and receive at
2761 the same time. This made most non trivial communication schema
2763 * Convert the PIDs from long int to int to match the MSG ones (and
2764 linux ones too) [Mt]
2765 * New function: gras_agent_spawn() to launch a new process on
2766 current host. Only working in simulation for now. [Mt]
2767 * New function: gras_os_hostport() returning a constant form (ie,
2768 not needing to be freed) of "gras_os_hostname():gras_os_myport()"
2771 * Make the backtrace of exceptions more human readable [Mt]
2772 * New module: xbt/str [Mt]
2773 a ton of string utility functions (split, join, printf to a newly
2774 allocated buffer, trim, etc)
2775 * New module: xbt/hash [Mt]
2776 SHA1 hashing algorithm (more to come if needed)
2777 * New module: xbt/synchro [Mt]
2778 synchronization tools (mutex and conditions) working the same way
2779 in simulation and in real life (mainly useful for GRAS, but not
2781 * New module: xbt/queue [Mt]
2782 classical producer/consumer synchronization scheme
2783 * xbt_dynar_new_sync() creates a synchronized dynar. All access
2784 (using the classical functions will get serialized) [Mt]
2785 * Make dictionary internal table dynamic. No need to specify its size
2786 anymore; functions xbt_dict_new_ext() and xbt_dict_hashsize_set()
2788 * Make sure the log channels are organized as a tree under windows
2789 (because of ANSI C compatibility issue, any channel were child of
2790 root directly) [Mt].
2793 * Cleaned many thing in surf and fixed a few bugs [AL].
2794 * Add a nice command line configuration mechanism to compose models [AL].
2795 * Add a new model for parallel tasks (ptask_L07) that is less buggy than
2796 the previous one (KCCFLN05). It relies on something that looks like
2797 a max-min sharing mechanism but cannot be written as such. A new solver
2798 was thus designed [AL].
2799 * Add a new solver to lmm. Based on Lagrange optimization and
2800 gradient-based descent, it enables to efficiently maximise systems s.a
2802 sum f_i(x_i) s.t Ax<= b with A_{i,j}>=0 and f_i a concave function.
2804 This solver enables to propose two new network models for TCP Reno and
2805 TCP Vegas based on Low's work. These models still need to be fully
2806 tested though [Pedro Velho].
2809 * Bug fix in SD_simulate. Now the time bound given as argument is
2811 * Use the new parallel task model (ptask_L07) as default.
2812 * Use the SURF command line configuration mechanism.
2813 * 0-size tasks (for synchronization) should now work.
2815 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Sun Apr 12 05:20:36 CEST 2009
2817 SimGrid (3.2) stable; urgency=high
2821 We still experience issues on this platform, but we believe that at
2822 least MSG is usable.
2824 GRAS API BREAKAGE (for simplification purpose, sorry):
2825 * the gras_msgtype_by_name is not used anymore. Instead of
2826 gras_msg_send(toserver, gras_msgtype_by_name("request"), &request);
2827 you can write (and must)
2828 gras_msg_send(toserver, "request", &request);
2829 - If you still want to pass a gras_msgtype_t to the function (to cache
2830 the type and avoid the lookup time), use the gras_msg_send_() variant.
2831 - Impacted functions:
2832 gras_cb_register, gras_cb_unregister, gras_msg_send, gras_msg_wait,
2833 gras_msg_rpccall, gras_msg_rpc_async_call, gras_msg_wait_ext
2834 * The callbacks are now expected to return 0 when everything went well
2835 (just like the main() function)
2837 GRAS new features and improvements:
2838 * New module mechanism where user code can use per process globals [Mt]
2839 This is similar to gras_userdata_*() functions, but for libraries. It
2840 factorize some code developped over and over in the examples and AMOK.
2841 It has still to be documented and used (only amok/peermanagement is
2843 * Fix a vicious bug in the TCP buffering mechanism which leaded to message
2844 loss when they were small enough to fit into the buffer and sent quickly
2845 enough so that they can all get received in one shoot.
2846 * gras_datadesc_by_name and gras_msgtype_by_name: now raise an exception
2847 if not found. Use the *_or_null() variant for the old semantic.
2848 * In gras_msg_handle, do not discard messages without callback.
2849 They are probably messages to be explicitly awaited later (ie, proofs of
2850 mis-synchronization in userland since they are sent before being awaited)
2851 No big deal usually.
2852 * gras_socket_meas_send/recv: semantic changed!
2853 The numerical arguments used to be (1) the total amount of data to send
2854 and (2) msg_size. This was changed to (1) msg_size and (2) amount of
2855 messages. This was need for the fool willing to send more than MAXINT
2856 bytes on quite fat pipes.
2859 * Do really rename the hostmanagement module to peermanagement. [Mt]
2860 Ie, rename functions from amok_hm_* to amok_pm_*. This breaks the API,
2861 but this is rather new and this was documented in the module
2862 documentation (poor excuses, I admit)
2863 * Bandwidth measurement semantic changed! This follows the changes to
2864 gras_socket_meas_send/recv explained above.
2867 * A sequential mode has been added to the workstations. When a workstation
2868 is in sequential mode, it can execute only one task, and the other tasks
2869 are waiting in a FIFO. [Christophe Thiery]
2872 * The KCCFLN05 workstation model now handles parallel tasks. It is the
2873 model for SIMDAG. [Christophe Thiery]
2874 * Bug fix in the maxmin solver: Some values were close to 0 instead of
2875 equal to 0, which caused some bad behaviors in
2876 saturated_constraint_set_update. I now use a threshold mechanism like in
2880 * When running manually src/testall, you select specific units [Mt]
2881 testall is the result of our cunit mechanism, and should replace all
2882 the scripty thingy around since bash don't run easily on billware.
2884 * A mallocator system has been added. [Christophe Thiery]
2885 Mallocators allow you to recycle your unused objects instead of freeing them
2886 and allocating new ones.
2888 Documentation update:
2889 * FAQ reworking + New FAQs:
2890 - "Valgrind spits tons of errors!" [Mt]
2891 - "How to repport bugs" [Mt]
2892 - "Cross-compiling a Windows DLL of SimGrid from Linux" [Mt]
2893 - "What is the difference between MSG, SimDag, and GRAS?" [Mt]
2894 - Communication time measurement within MSG [AL]
2895 - I experience weird communication times when I change the latency [AL]
2896 * GRAS tutorial [Mt]
2898 - an introduction to the framework and to the used communication model
2899 - an initiatic tour introducing the most proheminent features:
2901 . Lesson 0: Installing GRAS
2902 . Lesson 1: Setting up your own project
2903 o Part 2: Message passing
2904 . Lesson 2: Exchanging simple messages
2905 . Lesson 3: Passing arguments to the processes (in SG)
2906 . Lesson 4: Attaching callbacks to messages
2907 . Lesson 5: Using globals in processes
2908 . Lesson 6: Logging information properly
2909 . Lesson 7: Using internal timers
2910 . Lesson 8: Handling errors through exceptions
2911 . Lesson 9: Exchanging simple data
2912 . Lesson 10: Remote Procedure Calling (RPC)
2913 . Lesson 11: Explicitely waiting for messages
2914 . Recapping of message passing features in GRAS
2915 - A HOWTO section containing:
2916 o HOWTO design a GRAS application
2917 More are due, of course. They will come latter. In the meanwhile, you can
2918 check the examples which are still here.
2920 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri Mar 16 21:11:46 CET 2007
2922 SimGrid (3.1) stable; urgency=high
2926 There was a stack corruption somewhere, visible only when optimizing
2927 with these versions. [Vince]
2930 * This is a NEW module! SimDAG (SD for short) is a revival of the old SG
2931 module that enabled to play with Directed Acyclic Graphs. It is built
2932 directly on top of SURF and provides an API rather close to the old
2933 SG. Some old codes using SG are currently under rewrite to check that
2934 all needful functions are provided. [Christophe Thiery]
2937 * Complete rewrite of the KCCFLN05 workstation model. It is now an
2938 extension of the classical CLM03 model that gracefully handles
2939 failures. This is now the default model for MSG and GRAS. It doesn't
2940 handle parallel tasks yet though. [AL]
2941 * Bug fix: Weights were not correctly set in the network part.
2942 WARNING: This may have resulted in incorrect results with simulations
2943 where there are more than one flow on a given link. [AL]
2946 * After a (long ?) discussion on simgrid-devel, we have decided that the
2947 convention we had on units was stupid. That is why it has been decided
2948 to move from (MBits, MFlops, seconds) to (Bits, Flops, seconds).
2949 WARNING: This means that all previous platform files will not work as
2950 such with this version! A warning is issued to ask users to update
2952 A conversion script can be found in the contrib module of the CVS, under
2953 the name contrib/platform_generation/surfxml_update.pl [MQ]
2956 * Bug fix: Processes were started in reverse order, wrt deployment file.
2957 WARNING: if your code relies on this bug, please fix it. [AL]
2958 * Bug fix: Add a test in MSG_task_execute to stop whenever a task is
2959 being executed on two different locations. [AL]
2960 * Bug fix: Failures are now better supported thanks to Derrick's tests
2961 (there was many failure situations I hadn't thought of and that weren't
2962 correctly handled). [AL]
2963 * New function: MSG_host_is_avail indicates you whether a given m_host_t
2967 * New! a real RPC mechanism, as it ought to be since too long. [MQ]
2968 Exception occurring on server-side are propagated back to client (!).
2970 API CHANGE: the callback changed their prototype. Change:
2971 int my_handler(gras_socket_t expeditor, void *payload_data) {
2973 int my_handler(gras_msg_cb_ctx_t ctx , void *payload_data) {
2974 gras_socket_t expeditor=gras_msg_cb_ctx_from(ctx);
2976 * New! function: gras_msg_handleall to deal with all messages arriving
2977 within a given period.
2978 * New! function: gras_socket_server_range to get a server socket in a
2979 range of port numbers (ease to avoid port number conflicts) [MQ]
2980 * New! gras processes display their backtrace when they get a SIGUSR1
2981 or when Ctrl-C is pressed. Use Ctrl-C Ctrl-C to exit.
2982 Sweet to debug RL processes [MQ]
2986 - Do not force experiment sizes to be expressed in kb, or it becomes
2987 impossible to measure the latency this way (needs one byte-long tests)
2988 WARNING: this changes the amok_bw_* function semantic. [MQ]
2989 - Implements the link saturation stuff. [MQ]
2990 * Peer management module:
2991 New! module factorizing code that we wrote over and over [MQ].
2994 * New module: cunit (my jUnit implementation in ansi C) [MQ]
2995 - Test units are placed directly into the library code, they get extracted
2996 automatically and placed into the src/testall binary.
2997 - Convert most of the XBT tests to this system.
2998 * New functions: xbt_dynar_getfirst_as() and xbt_dynar_getlast_as() [MQ]
2999 * XML parsing: rewrote parts of flexml to enable multiple xml parsers to
3000 live in the same C code. This required to change a little bit the API
3001 of surfxml parsing but shouldn't be an issue for end-users. [AL]
3002 * New module: sparse graph structure with basic algorithms (this is work
3003 in progress and the API is not considered to be frozen yet). [AL]
3004 * Display more information on backtraces: source line & function names are
3005 now displayed just like valgrind does (rely on addr2line tool) [MQ]
3006 * New function: xbt_backtrace_display(). Sweet while debuging [MQ]
3007 * Reworked a little bit some #include statements to load only required
3008 headers. Some user code that relied on SimGrid to include stdlib or
3009 stdio may need to include it by themselves. [AL]
3010 * Fixed xbt/log.h. A missing SG_BEGIN_DECL prevented compilation with
3012 * Renamed xbt_host_t into xbt_peer_t since it betterly describes what I
3013 meant. This breaks the API of AMOK and of xbt/config. Sorry about this,
3014 but I guess that almost nobody used those parts. [MQ]
3016 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 14 Jul 2006 01:32:27 +0200
3018 SimGrid (3.0.1) stable; urgency=low
3021 * Unfortunately, I had missed 5 misnamed functions:
3022 xbt_fifo_item_t xbt_fifo_newitem(void);
3023 void xbt_fifo_freeitem(xbt_fifo_item_t);
3024 xbt_fifo_item_t xbt_fifo_getFirstItem(xbt_fifo_t l);
3025 xbt_fifo_item_t xbt_fifo_getNextItem(xbt_fifo_item_t i);
3026 xbt_fifo_item_t xbt_fifo_getPrevItem(xbt_fifo_item_t i);
3027 They're now deprecated. Please use their new versions:
3028 xbt_fifo_item_t xbt_fifo_new_item(void);
3029 void xbt_fifo_free_item(xbt_fifo_item_t);
3030 xbt_fifo_item_t xbt_fifo_get_first_item(xbt_fifo_t l);
3031 xbt_fifo_item_t xbt_fifo_get_next_item(xbt_fifo_item_t i);
3032 xbt_fifo_item_t xbt_fifo_get_prev_item(xbt_fifo_item_t i);
3034 * Bugfix: really disconnect fifo items which are remove_item()ed [AL]
3035 * Documentation: xbt_log module unmercifully reworked [MQ]
3036 * Bugfix: there was a problem with the ending of contexts with
3037 the pthread backend. It caused some weird deadlock or behavior
3038 depending on the pthread implementation. [AL]
3039 * Bugfix: get the exceptions raised in the simulator repport where
3040 and why they come from when they are not catched in time [AL, MQ]
3043 * Bugfix: Do repport the error when two non-connected hosts try to
3044 exchange data (Thanks to Flavien for stumbling into this one) [AL]
3047 * Add additionnal checkings on communications. Assert that two
3048 communicating hosts are connected by a set of links... [AL]
3051 * Add additionnal checkings on channel values in communication [AL]
3052 * New: MSG_task_get_source to see on which host a task was generated [HC]
3053 * New: int MSG_task_probe_from_host(int channel, m_host_t host): returns
3054 the number of tasks waiting to be received on channel and sent
3056 * New: MSG_error_t MSG_task_get_from_host(m_task_t * task, int channel, m_host_t host);
3057 waits for the first task coming from a given host.. [AL]
3059 GRAS new functionnalities: [MQ]
3060 * Enhance the parsing macro to allow the size of multidimentional objects
3061 to be given thru annotations.
3062 * New example (and documentation): Matrix Multiplication a la RPC
3063 (as when I was young!) and fix a bunch of bugs found on the way.
3065 GRAS performance improvements: [MQ]
3067 * Reduce the amount of cbps creation/destruction by making it static to
3068 datadesc_send/recv() and using a (newly created) cbps_reset (based on
3071 * Change libdata to a set so that we can search for stuff by ID (and thus
3072 reduce the insane amount of dict lookups)
3075 * Actually implement gras_datadesc_copy() so that we don't have to mimick
3076 RL communication on top of SG since it's so uneffective.
3077 It may also be used for inter-thread communication in RL, one day.
3078 * Use gras_datadesc_copy() to exchange messages on top of SG
3080 - improve message exchange performance on top of SG
3081 - deprecate transport_plugin_sg.c:gras_trp_sg_chunk_send() & recv()
3082 * Don't exchange on the network the size of the used part of buffer,
3083 instead, specify the possible buffer size to read().
3085 - reduces the amount of read/write calls (one pair per exchange)
3086 - reduces the amount of exchanged data (the size)
3087 - allows to retrieve all arrived data on receiver side, if we don't need
3088 it right now (subsequent read will peek the buffer)
3089 - allows the receiver to proceed with the begining of the stream before
3090 everything is arrived
3091 - make it possible to build an iov transport (using readv/writev)
3093 - take care of the data with non-stable storage (like stacked data),
3095 * If possible, TCP send uses vector I/O (when writev() is here)
3096 - Don't use it for receive since we send data sizes and data on the
3097 same stream, so we wouldn't be able to chain large amount of chunks
3098 before having to flush the stuff to read the size.
3099 * Rework the transport plugin mechanism to simplify it and reduce the
3100 amount of pointer dereferencement when searching for the right function
3103 * I guess that now, we do almost as few system calls as possible while
3104 doing as few data copy as possible.
3106 To improve it further, we could try to send all the sizes first and then
3107 all the data (to use iov on receiving size), but it's only a partial
3108 solution: when you have 2 dimensional data, the sizes of the second
3109 dimension is data of the first dimension, so you need 3 streams.
3111 I'm not sure the potential performance gains justify the coding burden.
3113 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 21 Oct 2005 14:42:20 +0200
3115 SimGrid (3.00) stable; urgency=high
3118 * New! Give the possibility to hijack the surf parser and thus bypass
3119 MSG_create_environment and MSG_launch_application. Have a look at
3120 examples/msg/msg_test_surfxml_bypassed.c to see how it can be done.
3122 -- Arnaud Legrand <simgrid-devel@lists.gforge.inria.fr> Sat, 20 Aug 2005 23:25:25 -0700
3124 SimGrid (2.96) unstable; urgency=low
3129 * New! Exception handling with setjmp or such (code from OSSP ex) [MQ]
3130 This deprecates the xbt_error_t mechanisms.
3131 It modifies (simplifies) all XBT and GRAS API.
3132 MSG API keeps unchanged (exceptions raised by XBT are catched from
3133 within MSG and masked with existing error handling facilities)
3136 * New! Add a FATPIPE model. [AL]
3137 * New! Add a parallel task model. [AL]
3138 * New! Add automatically a loopback interface (in the default
3139 network model) if none was precised.
3142 * Bugfix: MSG_process_resume now works with the current running process.
3144 * New! Add MSG_parallel_task_create and MSG_parallel_task_execute. [AL]
3145 * Modification of MSG_task_get_compute_duration. Once a task has been
3146 processed, the value returned by this function is now equal to 0. [AL]
3147 * New! Add double MSG_task_get_remaining_computation(m_task_t task) and
3148 MSG_error_t MSG_task_cancel(m_task_t task). Add a state
3149 (MSG_TASK_CANCELLED) to MSG_error_t corresponding to the cancelation
3150 of a m_task. For now, MSG_task_cancel only works with computation
3152 * New! Add double MSG_get_host_speed(m_host_t h) that returns the speed
3153 of the processor (in Mflop/s) regardless of the current load on the
3155 * API Change: use proper naming convention for MSG_getClock and
3156 MSG_process_isSuspended: MSG_get_clock and MSG_process_is_suspended.
3158 * New! Add void MSG_task_set_priority(m_task_t task, double priority).
3159 This function changes the priority of a computation task. This priority
3160 doesn't affect the transfer rate. A priority of 2 will make a task
3161 receive two times more cpu power than the other ones. This function
3162 has been added to suit the needs of Nguyen The Loc and hasn't been that
3163 much tested yet. So if it fails, please report it and send me your code.
3165 * API Change: removed all functions and types that were marked "deprecated"
3166 since many months. Renamed MSG_global_init_args to MSG_global_init.
3168 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Mon, 8 Aug 2005 17:58:47 -0700
3170 SimGrid (2.95) unstable; urgency=low
3173 * Steal some nice code to GNU pth to fix context detection and usage [AL]
3174 * Cleanup in the xbt_config API; add configuration callbacks. [MQ]
3175 * Cleanup in the initialization API: the unused "defaultlog" is dead. [MQ]
3178 * Bugfix: Allow absolute paths for platform description files [MQ]
3179 * Bugfix: do free the variables after use. Leads to drastic performance
3181 * Implement max_duration (ie, timeouts) on resources [AL]
3184 * Implement MSG_config to configure MSG at runtime. xbt_cfg test on a real
3186 * Implement MSG_channel_select_from() to help GRAS now that SURF provide
3187 the needed support (timeouts) [AL]
3190 * Implement measurement sockets. You can now get the bandwidth between two
3191 hosts thanks to AMOK (see below). [MQ]
3192 * gras_datadesc_dynar() builds a dynar type descriptor, allowing to send
3193 dynar over the network (yeah) [MQ]
3194 * Real (even if simplistic) implementation of gras_os_myname() on RL [MQ]
3195 * simple/static token-ring example. [Alexandre Colucci and MQ]
3196 * Use MSG_channel_select_from() and remove the *slow* hack we had to put
3197 in place before [MQ]
3200 * Differentiate the types "char[22]" and "unsigned char[22]" in automatic
3201 type parsing. "short" and "long" modifiers were also ignored; other
3202 modifier (such as reference level) are still ignored. [MQ]
3203 * Embeed the buffer size within the buffer itself on SG. [MQ]
3204 That way, send() are atomic and cannot get intermixed anymore (at least
3205 the ones which are less than 100k; bigger messages still have the issue)
3206 * Array size pushed by the field, not by the field type (or each
3207 and every long int will push stuff to the cbps) [MQ]
3208 * use select() to sleep since it allows to portably sleep less than one
3211 GRAS (minor cleanups)
3212 * <project>.Makefile.local (generated from gras_stub_generator) |MQ]:
3215 * Type Callbacks now receive the gras_datadesc_type_t they work on as argument.
3216 * type category 'ignored' killed as it was never used and were difficult
3218 * whether a type can cycle or not is now a flag, leaving room for more
3219 flags (as "ignored", if we feel the need one day ;)
3220 * Rename raw sockets to measurement sockets since "raw" has another
3221 meaning in networking community.
3224 * Advanced Metacomputing Overlay Kit introduction. It is based over GRAS
3225 and offers features not belonging to GRAS but that most applications
3226 need. One day, it may be a set of plugins loadable at runtime.
3227 * New module: bandwidth
3228 bandwidth measurement between arbitrary nodes running this module. [MQ]
3230 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 30 Jun 2005 16:29:20 -0700
3232 SimGrid (2.94) unstable; urgency=low
3234 The first beta release of SimGrid 3 !
3238 * Update the main page and the FAQ. Adding references to gforge.
3241 * Add a gras_os_getpid function.
3244 * Add MSG_task_get_compute_duration() and MSG_task_get_data_size()
3245 * Extend the logs so that they also print PID, hostname, date, ... if
3247 * Convert the MSG example to the use of xbt_logs instead of PRINT_MESSAGE,
3248 and kill the old version which were in testsuite/
3249 * Rewrite tools/MSG_visualization/colorize.pl for using with logs instead
3253 * Add xbt_os_time(). As the rest of xbt/portability, this is not public
3254 for users. Instead, each programming environment (GRAS, MSG,...) use it
3255 when needed to provide such a feature to users.
3256 Don't shortcut the mechanism or you will also shortcut the virtualization
3257 you need on the simulator.
3261 * Cleanups in configury with regard to compile optimization/warning flags.
3262 Also add -fno-loop-optimize to any powerpc since it's the optimization
3263 killing gcc (< 3.4.0).
3264 * Doxygen cleanups: move MSG examples, kill the second Doxygen phase
3265 needed by MSG examples complications
3266 * Borrow configury beautifications from PHP
3269 * Bugfix: XBT_LOG_NEW_DEFAULT_CATEGORY now compiles without compiler
3270 warning (thanks loris for stumbling into this one).
3271 * Bugfix: stop loading private headers (gras_config.h) from the public
3275 * Change SIMGRID_INSTALL_PATH to GRAS_ROOT in Makefiles generated for user.
3276 * Rename gras_get_my_fqdn to gras_os_myname and implement it in the simulator
3277 RL would imply a DNS resolver, which is *hard* to do in a portable way
3278 (and therefore delayed).
3279 * Implement a real timer mechanism and use it in timing macros. This allows
3280 to avoid rounding errors and get a 0.000005 sec precision in timing
3281 macros. While I was at it, various cleanups:
3282 - allow to declare more than one timed section per file (fix a stupid bug)
3283 - move some private declaration to the right place
3284 - merge conditional execution and timing macros into emulation module
3285 - document the module
3286 - make sure the module cleanups its mess on gras_exit
3287 * Documentation improvements:
3288 - (new) how to compile applications using GRAS
3289 - (new) emulation support (timing macros)
3291 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 13 May 2005 10:49:31 +0200
3293 SimGrid (2.93) unstable; urgency=low
3295 Alpha 4 on the path to SimGrid 3 (aka the "neuf-trois" version)
3298 - Use Paje properly where used. Still to be sanitized properly.
3299 - Portability fix: Add an implementation of the contexts using pthread
3303 - Add xbt_procname(): returns the name of the current process.
3304 Use it to show the current process's name in all logging.
3306 - fix detection of older flex version and the reaction, since we do
3307 depend on modern ones (we use lex_destroy)
3308 - Better separation of SG and RL in the libs: remove all simulation code
3309 from libgras. As a result, this lib is now only 200k when stripped.
3310 Some of the xbt modules may also be duplicated (two sets and such) and
3311 should be cleaned/killed before SG3.
3312 - Insist on using xlC on AIX because of weird problems involving gcc there.
3313 - Cleanup the make remote stuff. This is now done by scripts
3314 tools/graspe-{master,slave} (GRAS Platform Expender). This is still
3315 mainly for our private use, but we're working on changing them to user
3318 - Bugfix: flush the socket on close only if there is some *output*.
3319 - Bugfix: flush idempotent when there's nothing to send (don't send size=0)
3321 - Add MSG_task_get_name. The task names are mainly for debugging purpose,
3324 -- SimGrid team <simgrid2-users@listes.ens-lyon.fr> Fri, 4 Mar 2005 14:32:37 -0800
3326 SimGrid (2.92) unstable; urgency=low
3328 Alpha 3 on the path to SimGrid 3
3332 - New! First try of benchmarking macros.
3333 - New! First try so that gras_stub_generator generate deployment and
3334 remote compilation helpers.
3336 - Bugfix: Initialization fix in msg_test.
3340 - Bugfix: applied patch to lexer so that it doesn't need a huge heap.
3342 - Bugfix: let dicts work with NULL content (_foreach didn't) and cleanups
3344 - API Change: gras_os_sleep to take the amount of seconds as a double.
3345 Accepting an int was error prone since it was the only location where
3346 seconds were coded as such. It leaded to damn rounding errors.
3347 - Bugfix: Hard to belive that timers ever worked before this.
3349 -- SimGrid team <simgrid2-users@listes.ens-lyon.fr> Wed, 23 Feb 2005 22:09:21 +0100
3351 SimGrid (2.91) unstable; urgency=low
3353 Alpha 2 on the path to SimGrid 3
3357 - Bug fix in the lmm_solver.
3359 - New! Interface to Paje (see http://www-id.imag.fr/Logiciels/paje/)
3360 through the function MSG_paje_output.
3361 - New! Introducing two new functions MSG_process_kill() and MSG_process_killall().
3362 - It is possible to bound the rate of a communication in MSG with
3363 MSG_task_put_bounded() (was already in the previous version but I had forgotten
3364 to write it in the changelog).
3365 - Bug fix to let GRAS run on top of MSG until we move it directly on top
3370 - Various cleanups to the autotools stuff
3371 - Begin to move Gras examples to examples/gras/
3372 - Let make distcheck work again (yeah!)
3374 - documentation overhauled using doxygen.
3375 gtk-doc-tools is dead in SimGrid now.
3376 - Automatically extract all existing logging categories, and add the list
3377 to the documentation (long standing one, to say the less)
3379 - Cleanup the known architecture table. Reorder the entries to group what
3380 should be, and use a more consistent naming scheme.
3381 (some of the test dataset are still to be regenerated)
3382 - New! Allow library to register globals on each process just as userdata
3384 This is implemented using a xbt_dict and not a xbt_set, so we loose the
3385 lookup time (for now).
3386 Use it in msg and trp.
3387 This cleans a lot the internals and helps enforcing privacy of the
3388 headers between the gras components.
3389 - New! Add a timer mechanism, not unlike cron(8) and at(1).
3390 - Bugfix: gras_os_time was delirious in RL.
3391 - Bugfix: gras_trp_select/RL don't run into the wall when asked to select
3393 - Reenable GRAS now that it works.
3395 -- Arnaud Legrand <Arnaud.Legrand@imag.fr> Mon, 14 Feb 2005 14:02:13 -0800
3397 SimGrid (2.90) unstable; urgency=low
3399 Alpha 1 on the path to SimGrid 3
3401 * It is a long time since the last release of SimGrid. I'm sorry about
3402 that but as I had told you, I was rewriting a lot of things. I apologize
3403 to those who had been reporting bugs to me and that I had not answered.
3404 If your bug is still in the new version, please tell me. Here is a
3405 summary of the main changes.
3407 * REVOLUTION 1: The SimGrid project has merged with the GRAS project
3408 lead by Martin Quinson. As a consequence SimGrid gains a lot in
3409 portability, speed, and a lot more but you'll figure it out later.
3410 SimGrid now comprises 3 different projects: MSG, GRAS and SMPI.
3411 I wanted to release the new MSG as soon as possible and I have
3412 broken GRAS, which is the reason why, for now, only MSG is fully
3413 functional. A laconic description of these projects is available
3414 in the documentation.
3416 * REVOLUTION 2: I have removed SG and I am now using a new simulation
3417 kernel optimized for our needs (called SURF but only the developers
3418 should use it). Hence, MSG is now roughly 30 times faster and I think
3419 that by rewriting a little bit MSG, I could event speed it up a little
3420 bit more. Beside the gain in speed, it is also much easier to encode a
3421 new platform model with SURF than it was with SG. More to come...
3423 * REVOLUTION 3: I have tried to change a little as possible the API of
3424 MSG but a few things really had to disappear. The main differences
3425 with the previous version are:
3426 1) no more m_links_t and the corresponding functions. Platforms are
3427 directly read from a XML description and cannot be hard-coded
3428 anymore. The same format is used for application deployment
3429 description. The new format is described in the documentation.
3430 Have a look in tools/platform_generation. There is a tiny script
3431 that converts from the old platform format to the new one. Concerning
3432 the application deployment format, parsing the old one is tricky.
3433 I think most of you should however be able to convert your files. If
3434 it is really an issue, I can write a C code that does the conversion.
3436 2) the toolbox tbx does not exist anymore. We now have a library
3437 with much more data-structures but without the hash-tables (we have
3438 dictionaries that are much faster).
3440 -- Arnaud Legrand <Arnaud.Legrand@imag.fr> Mon, 31 Jan 2005 10:45:53 -0800
3442 *****************************************************************************
3443 * Follows the old GRAS changelog. It does not follow the same syntax, but I *
3444 * don't feel like converting the oldies. (Mt) *
3445 *****************************************************************************
3448 Version 2.90: "the long awaited one"
3449 - Finished rewriting and debugging MSG. Rewrote the documentation.
3450 - disable GRAS for now since it needs to be ported to the newest SG
3453 - Finish the port to windows (using mingw32 for cross-compile)
3456 - Main loop and datastructures of SURF. A cpu resource object is
3457 functional. Surf can thus be used to create cpu's with variable
3458 performance on which you can execute some actions.
3460 2004-11-15 Martin Quinson
3461 - Port to ARM. Simply added the alignment and size descriptions. Should
3462 work, but the ARM machines are so slow that I didn't had the opportunity
3463 to 'make check' over there yet.
3465 2004-11-15 Arnaud Legrand
3466 - Trace manager now written. It uses a heap structure and is therefore
3467 expected to be efficient. It may however be speeded up (particularly
3468 when many events occur at the same date) by using red and black
3469 trees. One day maybe...
3470 - Max-min linear system solver written. It uses a sparse matrix
3471 structure taking advantage of its expected use. Most operations are
3472 O(1) and free/calloc are called as few as possible. The computation of
3473 the minimum could however be improved by using a red and black tree
3476 2004-11-03 Arnaud Legrand
3477 - Rename every gras_* function that was in xbt/ to its xbt_
3479 - Add a heap and a doubly-linked list to xbt
3480 - Added a dichotomy to the dictionaries. make check works as well before
3481 so I assume that the patch is correct. I do not know however if things
3482 run effectively faster than before now. :)
3484 Inclusion of the SimGrid tree in the GRAS one. The archive is renamed to
3485 SimGrid, and the version number is bumped to 2.x
3487 2004-10-29 Martin Quinson
3488 - Introduction of the remote errors.
3489 They are the result of a RMI/RPC on the remote machine.
3490 ErrCodes being scalar values, you can't get the host on which those
3491 errors did happen. Extending the error mechanism as in Gnome is possible.
3492 No idea yet whether it is a good idea.
3494 2004-10-28 Martin Quinson
3495 - Interface revolution: the Starred Structure Eradication.
3496 I used to do typedef struct {} toto_t; and then handle *toto_t.
3497 Arnaud (and Oli) didn't like it, and I surrendered. Now, you have:
3498 - ???_t is a valid type (builded with typedef)
3499 - s_toto_t is a structure (access to fields with .)
3500 - s_toto is a structure needing 'struct' keyword to be used
3501 - e_toto_t is an enum
3502 - toto_t is an 'object' (struct*)
3504 typedef struct s_toto {} s_toto_t, *toto_t;
3505 typedef enum {} e_toto_t;
3506 Moreover, only toto_t (and e_toto_t) are public. The rest (mainly
3507 s_toto_t) is private.
3509 - While I was at it, all gras_<obj>_free() functions want a gras_<obj>_t*
3510 so that it can set the variable to NULL. It was so for dicts and sets,
3511 it changed for dynars.
3513 - Fix a bunch of memleaks in dict_remove
3514 - Fix a bug in sg/server_socket opening: it failed all the time.
3516 2004-10-07 Martin Quinson
3517 - Speed up dynar lookup operation a bit.
3519 gras_dynar_get is dead.
3521 Now, you can choose between gras_dynar_get_cpy (the old gras_dynar_get
3522 but should be avoided for efficiency reasons) and gras_dynar_get_ptr
3523 (which gives you the address of the stored data).
3525 gras_dynar_get_as is an helpful macro which allows you to retrieve a
3526 copy of the data using an affectation to do the job and not a memcpy.
3528 int toto = gras_dynar_get_as(dyn,0,int); rewrites itself to
3529 int toto = *(int*)gras_dynar_get_ptr(dyn,0);
3531 It does not really speedup the dynar test because they are
3532 setting elements all the time (and look them seldom). But the dict does
3533 far more lookup than setting.
3535 So, this brings the dict_crash test from ~33s to ~25s (200000 elms).
3537 2004-10-05 Martin Quinson
3538 - Allow to (en/dis)able the cycle detection at run time.
3540 Whether we should check for cycle or not is now a property of each
3541 datatype. When you think there may be some cycle, use datadesc_cycle_set.
3542 datadesc_cycle_unset allow to remove this property when previously set.
3544 Note that the cycle detection is off by default since it impacts the
3545 performance. Watch the data you feed GRAS with ;)
3547 This property is hereditary. Any element embedded in a structure having it
3548 set have it set for the time of this data exchange.
3550 You should set it both on sender and receiver side. If you don't set it on
3551 sender side, it will enter an endless loop. If you forget on receiver
3552 side, the cycles won't be recreated after communication.
3554 - Header reorganization.
3555 Kill gras_private.h, each submodule must load the headers it needs.
3557 2004-10-04 Martin Quinson
3558 - Interface revolution: do not try to survive to malloc failure.
3560 Now, gras_malloc and friends call gras_abort() on failure.
3561 As a conclusion, malloc_error is not a valid error anymore, and all
3562 functions for which it was the only gras_error_t return value are
3563 changed. They now return void, or there result directly.
3564 This simplify the API a lot.
3566 2004-09-29 Martin Quinson
3567 - Re-enable raw sockets.
3568 Created by gras_socket_{client,server}_ext;
3569 Used with gras_raw_{send,recv}
3572 It should allow to kill the last bits of gras first version soon.
3574 This is not completely satisfactory yet (duplicate code with
3575 chunk_{send,recv}; a bit out of the plugin mechanism), but it should
3578 - Simplify transport plugin (internal) interface by not passing any
3579 argument to _server and _client, but embedding them in the socket
3582 2004-09-28 Martin Quinson
3583 - Finish the port to AIX.
3584 autoconf was my problem (segfault within the malloc replacement
3585 function. No idea why)
3587 2004-09-16 Martin Quinson
3588 - Fix some size_t madness on 64bit architectures.
3590 2004-09-08 Martin Quinson
3591 - Reduce the number of system headers loaded, overload some more system
3592 calls (such as malloc to cast the result of the system one, and work
3594 - Fix and reintroduce the config support
3596 2004-09-07 Martin Quinson
3597 - Source code reorganization to allow Arnaud to surf all over there.
3598 - Allow to document the logging categories.
3599 - Remove all uppercase from logging categories and useless cleanup in names.
3601 2004-08-18 Martin Quinson
3602 Version 0.6.2 (protocol not changed; API changed)
3603 - Interface cleanup: gras_msgtype_by_name returns the type (instead of a
3604 gras_error_t), and NULL when not found. Functions expecting a msgtype
3605 as argument (msg_wait; msg_send) deal with NULL argument by providing a
3606 hopefully usefull message.
3607 - Portability to prehistoric sparcs again
3609 2004-08-17 Martin Quinson
3610 Version 0.6.1 (protocol not changed; ABI not changed)
3611 - prealloc some buffers to speed things up
3613 2004-08-11 Martin Quinson
3614 Version 0.6 (protocol not changed; ABI expended)
3615 - The parsing macro can deal with the references, provided that you add
3616 the relevant annotations (using GRAS_ANNOTE(size,field_name))
3618 2004-08-09 Martin Quinson
3619 Version 0.5 (protocol not changed; ABI changed)
3620 - Allow to off turn the cycle detection code in data exchange at
3621 compilation time. It should be at run time, but I'm short of time (and
3622 the config stuff is still broken). That way, we keep dict out of the
3623 critical path, which is good because the performance is poor:
3624 - search not dichotomial yet
3625 - dynar give no way to access their content and memcpy everytime
3626 - In composed data description (struct, ref and so on), stop foolness of
3627 keeping the subtype's ID, but store the type itself. This keeps sets out
3628 of the critical path, which is good since they rely on dynar and
3629 dictionnaries. The only loose of that is that we cannot detect the
3630 redeclaration of a structure/union with another content (but I'm not sure
3631 the code detected well this error before anyway). We still can detect
3632 the redefinition discrepancy for the other types.
3633 - Use a whole bunch of optimisation flags (plus -fno-strict-aliasing since
3634 it breaks the code because of type-punning used all over the place).
3635 This breaks on all non-gcc architectures (for now).
3637 All those changes (plus the buffer of last time) allow me to gain 2 order
3638 of magnitude on cruel tests consisting of 800000 array of integers on two
3639 level of a hierarchical structure (200 secondes -> 4 secondes)
3642 - the selector of reference must now return the type it points to, not
3643 the ID of this type.
3645 2004-08-06 Martin Quinson
3646 Version 0.4 (protocol changed; ABI not changed)
3647 - Allow to pass --gras-log argument to processes in simulation mode. Really.
3648 - New debugging level: trace (under debug) to see effect of GRAS_IN/OUT
3649 - Implement a buffer transport, and use it by default (it relies on tcp in
3650 real life and on sg in simulation).
3651 That's a bit hackish since I had a new field to the structure to store
3652 its data without interfering with the subtype ones. Inheritance
3653 is tricky in C. And that's a kind of reverse inheritance with one class
3654 derivating two classes. Or maybe a game with java interfaces. Anyway,
3655 that's damn hard in C (at least).
3656 Moreover, I got tired while trying to ensure plugin separation and
3657 genericity in SG mode. MSG wants me to do weird things, so let's go for
3658 cruel hacks (temporarily of course ;).
3659 See comment in transport_private.h:71
3660 - do not include all the _interface headers in private but in the files
3661 which really need them (to cut the compilation time when they are
3664 2004-07-26 Martin Quinson
3665 Version 0.3 (protocol not changed; ABI changed)
3666 - Major overhault of the datadesc interface to simplify it:
3667 - shorted the function names:
3668 s/gras_datadesc_declare_struct/gras_datadesc_struct/ and so on
3669 - add a trivial way to push/pop integers into the cbps without malloc.
3670 This allows to make really generic sub_type description, which simply
3671 pop their size of the stack.
3672 - add a function gras_datadesc_ref_pop_arr() which does what users want
3673 most of the time: Declare a dynamic array (which pops its size of the
3674 stack) and declare a reference to it. Poor name, but anyway.
3675 - kill the post-send callback, add a post-receive one
3677 2004-07-23 Martin Quinson
3678 Version 0.2 (protocol changed; ABI changed)
3679 - add some testing for cpbs in the test cases, and fix some more bugs.
3680 This invalidate again the little64 data file, since I cannot regenerate
3682 - remove an awfull optimization in the logging stuff, allowing me to:
3683 - understand it again
3684 - learn gcc how to check that the argument match the provided format
3685 - fix all errors revealed by gcc after that
3686 - internal keys of dict are not \0 terminated. Deal with it properly in
3687 loggings instead of segfaulting when the user want to see the logs :-/
3689 2004-07-22 Martin Quinson
3690 - Fix some stupid bug preventing cbps (callback postit) from working
3692 2004-07-21 Martin Quinson
3693 - Some documentation cleanups
3694 - remove the useless last argument of msgtype_declare
3695 - rename the Virtu functions to fit into the 'os' namespace
3696 - move headers src/include -> src/include/gras/ and stop fooling with
3697 gras -> . symbolic link
3698 - make distcheck is now successful
3700 2004-07-19 Martin Quinson
3702 - Build shared library also
3703 - Install html doc to the right location
3704 - stop removing maintainer files in make clean
3705 - build tests only on make check
3707 2004-07-13 Martin Quinson
3709 - No major issue in previous version => change versioning schema
3710 - Re-enable little64 convertion test now that Abdou kindly regenerated the
3711 corresponding dataset.
3713 2004-07-11 Martin Quinson
3715 - Get it working with any kind of structure (we can compute the padding
3716 bytes remotely for all the architectures I have access to)
3717 - Implement the structure parsing macro (still not quite robust/complete)
3718 - Improvement to the remote testing toysuite
3720 2004-07-10 Martin Quinson
3721 [autoconf mechanism]
3722 - get ride of a bunch of deprecated macros
3723 - actually run the test for two-compliment, not only compile it :-/
3724 - test whether the structures get packed (and bail out if yes. Damn.
3725 Alignment is a serious matter)
3726 - test whether the structures get compacted (but respecting the alignment
3727 constraints of each types)
3728 - test whether the array fields of structures can straddle alignment boundaries
3730 - Damnit, double are bigger than float (typo in creation of 'double' datadesc)
3731 (took me 2 hours to find that bug, looking at the wrong place)
3732 - Add gras_datadesc_declare_{union,struct}_close(). They must be used
3733 before sending/receiving and are used to compute the offsets of fields
3734 - Given that padding size depend even on compiler options, keep track of
3735 alignment and aligned_size only for the current architecture. Not a big
3736 deal since we send structure fields one after the other (seems
3738 - Add the datastructure used for IEEE paper by the PBIO guys to the test
3739 program, let it work on linux/gcc/little32. portability todo.
3741 2004-07-08 Martin Quinson
3742 - import and improve remote compilation support from FAST
3743 - make sure make check works on half a dozen of machines out there
3745 2004-07-07 Martin Quinson
3746 Let's say it's version 0.0.3 ;)
3747 - Implement conversions (yuhu!)
3748 - Let it work on solaris (beside conversion, of course)
3749 - Stupid me, using rand() to generate the conversion datatests in not wise.
3751 2004-07-06 Martin Quinson
3752 - Let make dist work, since I'm gonna need it to compile on remote hosts
3753 - Let Tests/datadesc_usage write the architecture on which the file was
3754 generated as first byte.
3755 - Add PowerPC (being also IRIX64), SPARC (also power4) and ALPHA
3756 architecture descriptions.
3757 - Add datadesc_usage.{i386,ppc,sparc} files being the result of execution
3758 on those architectures.
3759 - Optimization: send/recv array of scalar in one shoot
3761 2004-07-05 Martin Quinson
3762 - YEAH! GRAS/SG and GRAS/RL are both able to run the ping example !
3764 - Plug a whole bunch of memleaks
3765 - each process now have to call gras_{init,exit}. One day, their log
3766 settings will be separated
3767 - Continue the code factorisation between SG, RL and common in Transport.
3769 2004-07-04 Martin Quinson
3771 - Redistribution between SG and RL.
3772 We wanna have to accept in SG, so move accepted related parts of RL in
3773 the common part. (more precisely, the dynar of all known sockets is no
3774 more a static in transport.c, but part of the process_data)
3776 [gras_stub_generator]
3777 - Bug fix: Do call gras_process_init from gras_init (wasnt called in RL).
3779 2004-07-03 Martin Quinson
3780 - Create a new log channel tbx containing dict, set, log, dynar (to shut
3781 them all up in one shot)
3783 - Fix the ugly case of reference to dynamic array.
3784 - New (semi-public) function gras_datadesc_size to allow the messaging
3785 layer to malloc the needed space for the buffer.
3787 - gras_socket_close now expect the socket to close (and not its address to
3788 put NULL in it after it). This is because the socket passed to handlers
3789 is one of their argument (=> not writable).
3791 - propagate the interface cleanup from last week in datadesc, ie remove a
3792 superfluous level of indirection. User pass adress of variable
3793 containing data (both when sending and receiving), and not of a variable
3794 being a pointer to the data. Let's say that I like it better ;)
3795 The price for that is constructs like "int msg=*(int*)payload" in
3796 handlers, but it's a fine price, IMHO.
3798 - Let it work in RL (yuhu)
3800 2004-06-21 Martin Quinson
3802 - porting SG plugin and SG select to new standards (works almost).
3803 - plug memleaks and fix bugs around.
3806 - cleanup the prototype of data recv and force users to specify when they
3807 want to handle references to objects. Test case working even for cycles.
3808 - plug memleaks. Valgrind is perfectly ok with this.
3810 2004-06-12 Martin Quinson
3812 - cleanup the separation between plugin and main code in plugin creation
3814 2004-06-11 Martin Quinson
3816 - Reput hook for raw sockets, needed for BW experiments
3817 - kill a few lines of dead code
3818 [Data description] Interface cleanup
3819 - gras_datadesc_by_name returns the searched type or NULL.
3820 That way, no variable is needed to use a type desc once, which makes
3822 - gras_datadesc_declare_[struct|union]_append_name is removed. The last
3823 two parameters were strings (field name, type name), leading to
3825 [Dicos] Interface cleanup
3826 - gras_dico_retrieve -> gras_dico_get ; gras_dico_insert -> gras_dico_set
3827 This is consistant with the dynar API.
3829 2004-04-21 Martin Quinson
3831 - Porting to new standards.
3833 - interface cleanup.
3834 There is no bag anymore, no need to take extra provision to mask the
3835 pointers behind "ID".
3836 Better splitup of functions between files create/exchange/convert.
3837 This is still a bit artificial since convert and receive are so
3838 interleaved, but anyway.
3840 - add a queued message list to procdata (the ones not matching criteria
3842 - factorize some more code between SG and RL wrt procdata
3844 - use gras_exit in example to track memleaks
3845 - get rid of gs_example now that GS is properly integrated into gras
3846 - update run_test to integrate the latest tests (datadesc)
3848 - rename WARNINGn macros to WARNn since it prooved error-prone
3850 2004-04-19 Martin Quinson
3852 - register init/exit functions within gras module mechanism
3853 - send/receive function.
3854 Convertion is not implemented, but short-cutted if not needed.
3855 struct/array elements are sent one by one (instead of block-wise), but
3856 nobody really cares (yet). Get a prototype before optimizing.
3857 - tests (using a file socket) for DD send/receive on:
3858 - base types: int, float
3859 - array: fixed size, string (ie ref to dynamic string)
3860 - structure: homogeneous, heterogeneous
3861 - chained list, graph with cycle
3862 Believe it or not, valgrind is not too unhappy with the results. The
3863 cycle happily segfaults, but the others are ok. And I'm sick of pointers
3867 - Bugfix when using a filename explicitely (instead of '-')
3869 2004-04-09 Martin Quinson
3871 - factorize more code between RL and SG in socket creation
3872 - Complete the implementation and tests of:
3874 o file (only in RL, and mainly for debugging)
3876 I lost 3 days to design a portable address resolver, and then decided
3877 that the prototype mainly have to run on my box.
3878 Addressing portability too early may be like optimizing too early :-/
3880 - use gras_init in the Tests instead of the crappy parse_log_opt
3881 (the latter function is removed)
3882 [Conditional execution]
3883 - New functions: gras_if_RL/gras_if_SG (basic support for this)
3884 [Code reorganisation]
3885 - Get rid of libgrasutils.a since it makes more trouble than it solves.
3886 Build examples against the RL library, since there is no way to disable
3887 its creation for now.
3889 For information, the beginning of coding on GRAS was back in june
3890 2003. I guess that every line has been rewritten at least twice since