1 SimGrid (3.12) NOT RELEASED; urgency=low
4 * Interface improvement:
5 - Rename MSG_host_is_avail(h) to MSG_host_is_on(h)
7 * Interface improvement:
8 - Rename Host.isAvail() to Host.isOn()
12 - SIMIX_process_throw: raises an exception in a remote process
13 * Refactoring: Separate submodules
14 - libsmx: the public interface, as libc in a real system
15 - popping: the strange dance that converts a user request into a kernel handling
16 - smx_context_*: the virtualization mechanisms that embeed the user code
17 - smx_*: the handling of each simcalls
18 * Rename smx_action_t into smx_synchro_t, making explicit that these
19 things are used to synchronize processes with their environment.
20 For example, a communication is a sort of synchronization involving
21 the communicating processes (that may block until the exchange) and
22 the platform. The same can be said from computations, etc.
26 - 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.
27 - MPI_Keyval*, MPI_Attr* functions, as well as MPI_Comm_attr*, MPI_Type_attr* variants (C only, no Fortran support yet)
28 - MPI_Type_set_name, MPI_Type_get_name
29 - MPI_*_c2f and MPI_*_f2c functions
30 - MPI_Info_* functions (beware, get_nthkey may not follow the insertion order)
31 - MPI_Pack, MPI_Unpack and MPI_Pack_size functions
32 - Activate a lot of new tests from the mpich 3 testsuite
34 - Constant times can be injected inside MPI_Wtime and MPI_Test through options smpi/wtime and smpi/test
35 - InfiniBand network model added : Based on the works of Jerome Vienne (http://mescal.imag.fr/membres/jean-marc.vincent/index.html/PhD/Vienne.pdf )
36 - When smpi/display_timing is set, also display global simulation time and application times
37 * Collective communications
38 - 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
39 - 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/).
40 - Support for Rabenseifner Reduce/Allreduce algorithms (https://fs.hlrs.de/projects/par/mpi//myreduce.html)
42 - Replay now uses algorithms from wanted collective selector
43 - Replay can be used with SMP-aware algorithms
44 - Memory occupation of replay should now be contained (temporary buffers allocated in collective algorithms should be shared between processes)
45 - 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.
47 - [#17799] : have mpi_group_range_incl and mpi_group_range_excl better test some corner cases
48 - Correctly use loopback on fat-tree clusters
49 - Asynchronous small messages shouldn't trigger deadlocks anymore
52 - "Full" network optimization flag was broken since Surf++
53 - Better handling of precision flags in maxmin
54 - Fix bug causing sometimes "Impossible" errors
57 - Add a xbt_heap_update function, to avoid costly xbt_heap_remove+xbt_heap_insert use
58 - Add a xbt wrapper for simcall_mutex_trylock (asked in [#17878])
59 - Add two new log appenders : rollfile and splitfile. Patch by Fabien Chaix.
62 -- $date Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
64 SimGrid (3.11) stable; urgency=low
69 * Normalizing pointers addresses tool for better diff between logs
72 * Add cloud examples using new VMs
73 - examples/msg/cloud/two_tasks_vm.tesh
74 - examples/msg/cloud/simple_vm.tesh
75 - examples/java/cloud/cloud.tesh
76 - examples/java/cloud/migration/migration.tesh
77 * Add java surf examples:
78 - examples/java/surfPlugin/surf_plugin.tesh
79 - examples/java/reservationSurfPlugin/reservation_surf_plugin.tes
80 - examples/java/surfCpuModel/surf_cpu_model.tesh
81 * Add SMPI+MSG example:
82 - examples/smpi/smpi_msg_masterslave/
87 - msg task destroy cancel test
88 - msg_host on/off test
89 * Move all tests in testsuite to teshsuite (adding tesh files)
90 * Restructure teshsuites
91 - one folder for each kind of test
92 * Restructure AddTests.cmake
94 - structure the order of tests (with sections)
98 - creation of a VM on a PM
99 - migration of a VM from a PM to another PM
101 - MSG_process_join(msg_process_t process, double timeout)
102 - msg_bar_t MSG_barrier_init(unsigned int count)
103 - int MSG_barrier_wait(msg_bar_t barrier)
104 - void MSG_barrier_destroy(msg_bar_t barrier)
105 - msg_as_t MSG_environment_as_get_by_name(const char * name)
106 * New option "msg/debug_multiple_use" to help debugging when a task is used
109 - Improvements and finalization of MSG_storage, MSG_file APIs and their
111 - Increase code coverage in test suites
115 * Protect context stacks against stack overflow. The number of protected memory
116 pages allocated on the top of each stack (1 by default) can be configured
117 with the new command line option --cfg=contexts/guard_size:<value>.
118 * Simcalls are now generated by a python script that
119 - generates files included by SimGrid
120 - checks that all the functions exist, and proposes prototypes
122 - remove sem_destroy, file_set_data, comm_destroy, vm_set_state,
123 host_set_data, host_get_data
125 - simcall_process_join(smx_process_t process, double timeout)
126 * Fix bug where sleeping processing could not be suspended.
129 * Translate surf models from C to C++
130 - Generic classes for all models: Model, Resource, Action
131 - A generic interface for each kind of model (CPU, Network, Storage
132 Workstation, WorkstationVM)
134 * Translate surf routings from C to C++
135 * Add callbacks using sigc++ or boost::signals2
136 - Add callback functions for resource creation/destruction
137 - Add callback functions for action state change
138 - Handle Energy as a plugin
139 * Replace swag by boost::intrusive
140 * Add new routing models for clusters. For documentation, see
141 http://simgrid.gforge.inria.fr/simgrid/latest/doc/platform.html#pf_cluster
142 - tori, with topology="TORUS" and topo_parameters="ndim1,ndim2,...,ndimn"
143 parameters for cluster tag
144 - Fat trees, with topology="FAT_TREE" and
145 topo_parameters="h;m1,...,mh;w1,...,wh;p1,...,ph" parameters for cluster tag
146 - see examples/platforms/torus_cluster.xml and
147 examples/platforms/fat_tree_cluster.xml
151 * Hostfiles support host:nb_processes construct to deploy several processes on
153 * Collective communication algorithms should not crash if used with
154 improper number of nodes and report the error.
155 * SMPI now partially supports MPI_Topologies : MPI_Cart_create, MPI_Cart_shift,
156 MPI_Cart_rank, MPI_Cart_get, MPI_Cart_coords, MPI_Cartdim_get,
157 MPI_Dims_create, MPI_Cart_sub are supported.
158 * New interface to use SMPI programmatically (still depends on MSG for
159 some parts, see examples/smpi/smpi_msg_masterslave) :
160 - SMPI_app_instance_register(const char *name, xbt_main_func_t code,
164 * Global variables privatization in MPI executables is now performed at runtime
165 with the option smpi/privatize_global_variables (default:no).
166 Limitations : Linux/BSD only, with mmap enabled. Global variables inside
167 dynamic libraries loaded by the application are not privatized (static
168 linking with these libraries is advised in this case)
171 * Options defined in XML work correctly now.
174 * New cmake option, enable_lib_in_jar, to control whether native libraries are
175 copied into simgrid.jar or not (ON by default). Use this option if you want
176 to reduce the size of the installed simgrid.jar, *and* the native libraries
177 are kept installed elsewhere.
178 * Surf binding with SWIG (code generated in maintainer mode only):
179 - plugin to handle callbacks
180 - CPU model only for the moment
183 * Supernovae build mode is definitively removed. It was used to improve
184 inlining and inter-module optimizations. It is nowadays superseded by
185 link-time optimizations commonly available in compilers.
186 * Update ns-3 find lib. Bindings for ns-3 should work again now.
187 * Add boost dependency for surf++
188 * Add new macro for tests
189 - ADD_TESH(name <tesh_args>)
190 - ADD_TESH_FACTORIES(name "thread;ucontext;raw" <tesh_args>)
194 - xbt_bar_t XBT_barrier_init(unsigned int count)
195 - int XBT_barrier_wait(xbt_bar_t barrier)
196 - void XBT_barrier_destroy(xbt_bar_t barrier)
197 * Make the xbt_os_time module public
199 -- Sat May 31 22:39:38 CEST 2014 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
201 SimGrid (3.10) stable; urgency=low
203 The Clean Diaper Release, a.k.a. SimGrid is leak-free.
206 * Reintegrate Java to the main archive as desynchronizing these
207 package is not acceptable anymore (Java is now considered stable)
208 * Add explicit synchronization facilities through semaphores
209 * Bug fix: Task.setDataSize() only changed the C world, not the value
210 cached in the Java world
213 * Dramatically change the way files are handled. API and internals changed, but
214 this part of MSG was not considered as production grade either.
215 * Add explicit synchronization facilities through semaphores
216 * Add a new function MSG_host_get_process_list()
217 * Preliminary DVFS support (see examples/msg/energy/ for details)
220 * SMPI is now included directly in the libsimgrid as the windows
221 linker doesn't force us on splitting it anymore.
222 * Improvements of the SMPI replay tool:
223 - Most of the collective communications are now rooted in the same process as
224 in the original application.
225 - Traces now rely on the same MPI data type as the application (MPI_BYTE was
226 used until now). Multiple data types can now be used in a trace.
227 - The replay tool now supports traces produce either by TAU or a modified
229 - Bug Fix: the compute part of the reduce action is now taken into account.
230 - Gatherv collective is now supported
231 - SimGrid (SMPI for now) can generate replay traces as well. Option -trace-ti
232 of smpirun outputs time independent traces for the current run. One file
233 is created per process. If too many processes are simulated, this behavior
234 can be changed to one file for all processes by using the
235 tracing/smpi/format/ti_one_file flag
236 * smpirun generates the host file if needed (with given host count and platform)
237 * Integration of more than 100 STAR-MPI, MPICH, OpenMPI collective algorithms
238 - allows to select one in particular with --cfg=smpi/coll_name:algorithm
239 - allows to use the decision logic of OpenMPI(1.7) or MPICH(3.0.4) by setting
240 --cfg=smpi/coll_selector:(mpich/ompi)
241 * Support for new functions : MPI_Issend, MPI_Ssend, Commutative operations in
243 * Add a --cfg:tracing/smpi/internals option, to trace internal communications
244 happening inside a collective SMPI call.
245 * Fix the behavior of complex data types handling.
246 * Make MPI_Wtime another synchronization point to take computations into
248 * Replace MPICH-1 test suite by the one from MPICH 3.0.4. Can be built using
249 enable_smpi_MPICH3_testsuite flag in cmake. Run with ctest.
250 * Add all missing Fortran bindings, SMPI should work with Fortran 90
251 (no privatization of global variables yet)
252 * Preliminary DVFS support (see examples/smpi/energy/ for details)
255 * Verification of liveness properties is now available for SMPI applications
256 (in addition to MSG applications)
257 * Bugged examples using SMPI in examples/smpi/mc/
258 * Add --cfg=model-check/visited option. Allows the verification of infinite
259 programs. Detection of loops in the execution thanks to the system state
260 comparison and reduction of the state space to explore. Can be combined with
261 DPOR for safety properties.
264 * Allow to change SimGrid configuration (see --help) within the code
265 thanks to SD_config() as it can be done in MSG.
266 * Add a new function SD_task_set_amount() upon user request.
269 * Handle units for values (10ms, 10kiloflops, 10Bps, 1GB, ...)
270 * Remove rule based routing (no more PCRE dependency)
271 * Add a limiter_link option to cluster tag, to specify a maximum reachable
272 bandwidth in fullduplex mode when it is less than twice the nominal bandwidth.
273 * Add a loopback_bw and loopback_lat options to cluster tag.
274 * Fix the peer tag that could not be mixed with other AS within a Vivaldi
275 routing. Now peers are encapsulated in an AS and have their own private
276 router but this is transparent.
279 * Our own implementation of getline is renamed xbt_getline, and gets
280 used even if the OS provide a getline(). This should reduce the
281 configuration complexity by using the same code on all platforms.
282 * New type: xbt_cfg_elm_boolean.
283 * Allow to use yes/no for boolean configuration options in the command line.
284 * Allow to disable SimGrid cleanups at exit from command line option.
285 There are situations where one may want a simulation to end with an exit.
286 Unfortunately, calling exit may cause SimGrid to segfault, which is quite
287 annoying when scripting around the simulator. Adding a
288 --cfg=clean_atexit:no allows to circumvent this issue.
291 * Lots of memory leaks were corrected in this release.
292 There is no known memory leaks anymore, in all of our 600+ tests.
293 * New command line option --version, to get SimGrid version information.
294 Packagers may want to add extra words to SIMGRID_VERSION_EXTRA defined in
296 * Supernovae builds are deprecated, and expected to be removed in the next
299 -- Sun Nov 17 00:26:44 CET 2013 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
301 SimGrid (3.9) stable; urgency=low
303 The Grasgory release: GRAS is really dead now.
305 * Complete overhaul of the internal host structures scheme.
308 * If you use GRAS, you should stay at SimGrid 3.5 (at most) since it
309 was considered as experimental and badly maintained since then.
310 * Keeping it was thus a trap to our potential users, that could take
311 it instead of MSG or SMPI by mistake despite is pity state.
312 * GRAS seems to have very few users (if any), and no one volunteered
313 to maintain it further. It also induces a lot of XBT code (for
314 portability sake), that must be maintained too.
315 * For all these reasons, we killed GRAS. If someone wants to revive it
316 in the future, don't cry, our git history still remembers of GRAS.
319 * Major overhaul. Merge our documentation again as time proved that
320 splitting it was really not helping our users.
321 * Further improve the developer documentation to help newcomers
322 hacking on SimGrid itself. The user documentation (and in
323 particular, the beginner documentation) is still in a sorry state.
326 * Now works on Windows too!
327 * Much more extensive test suite, from MPICH
330 * Add a new loader (SD_PTG_dotload) that creates a parallel task graph
331 (i.e., a DAG whose nodes are parallel tasks) from a dot file. Creates a
332 dynar of SD_TASK_COMP_PAR_AMDAHL and SD_TASK_COMM_MXN_1D_BLOCK tasks.
333 * Bug fix: let task be scheduled when the last dependency to be solved is
334 a control dependency.
335 * Remove SD_load_environment_script function.
336 Use the C sg_platf function if you want to declare a platform
340 * New function: MSG_process_get_number()
341 * Old function documented: MSG_config()
342 * Remove MSG_load_platform_script function
343 Use the C sg_platf function if you want to declare a platform
347 * Change the default value of the TCP_gamma constant (maximal size of TCP
348 congestion window) to a more realistic 4MiB value. If you notice changes in
349 your simulation results, you can fall back to the previous 20k tiny window
350 by adding --cfg=network/TCP_gamma:20000 on command line.
351 * (Hopefully) fix a bug wrt periodic availability and state traces
352 * Bug fix: use default values at start when first event in availability/state
353 trace is not at time 0.
356 * remove the "new_" part of function name sg_platf_new_trace_connect
357 (resulting in sg_platf_trace_connect), since it does not create
361 * Kill synchronized dynars, and xbt_dynar_dopar(). We cannot think of a
362 use case where it's really mandatory, and maintaining it was a pain in
364 * New: xbt_fifo_search(), search an item with a user-provided
365 comparison function instead of dumb pointer comparison.
368 * Fix the lua deployment:
369 Use `simgrid.init_application()` before deployment instead of
370 `simgrid.msg_register_application()` after.
373 * Transfer the tracing files into the corresponding modules.
375 -- Tue Feb 5 11:31:43 CET 2013 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
377 SimGrid (3.8.1) stable; urgency=low
379 The "we are told that some people want to also *install* the simgrid
382 * Add missing file "tesh.1" to the archive.
384 -- Sat Oct 27 16:12:11 CEST 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
386 SimGrid (3.8) stable; urgency=low
388 The Psssshiiiit release: SimGrid jumps into the Cloud.
391 * Add an experimental interface to manipulate VMs. They are mainly
392 process groups with very few intrinsic semantic, but they should
393 allow you to build the semantic you want easily.
394 * New function: MSG_host_set_property_value()
395 * New function: MSG_process_on_exit(). To clean memory in all cases.
396 * Bug fixes that made the host (and link) failures unusable.
397 * Add a way to auto-restart process when the host in which they are
398 executing comes back (ON_FAILURE="RESTART" on deployment file,
399 MSG_process_auto_restart_set).
400 * Use the "msg_" prefix for all datatypes (instead of m_, msg_ and MSG_),
401 please stop using the old ones, they are DEPRECATED.
403 * Deprecate functions MSG_global_init() / MSG_global_init_args()
404 Please use MSG_init() instead. (reducing the amount of entry
405 points in the library helps us).
406 * Make it impossible to link against the wrong version of the lib
407 * Deprecate MSG_clean(). No need to call it anymore.
408 * Function MSG_get_host_number() is not deprecated anymore.
411 * Split the doc into a user guide and a reference guide.
412 * Start a developper guide to help people hacking on SimGrid.
415 * Enable tracing by default. This modules rocks you should use it.
416 * Remove option custom_flags. Now use environment variables CFLAGS
418 * Use default cmake things to detect lua instead of home grown ones.
419 * New option "enable_mallocators" to disable mallocators, for debugging
420 purpose ("on" by default).
423 * Bug fixes around the resource failures: don't let the processes
424 survive the host they are running onto.
425 * Add an interface to auto-restart processes when the host in which they are
426 executing comes back.
427 * Ensures that SIMIX_clean is called automatically. It's not part of
428 the public interface anymore (bindings should be updated).
431 * Bug fix for when SD_Simulate is called with a positive value: be careful
432 when comparing doubles. Sometimes they are different for non significant
434 * New types of typed tasks. SD_TASK_COMP_PAR_AMDAHL represents a
435 parallel task whose initial work is distributed among host according
436 to the Amdahl's law. Such tasks are created with a parameter alpha
437 that corresponds to the non-parallelizable part of the computation.
438 SD_TASK_COMM_PAR_MXN_1D_BLOCK represents a complex data redistribution
439 between two sets of workstations assuming a 1D block distribution (each
440 workstation owns a similar share of data) on both sides.
442 These tasks can be scheduled with SD_task_schedulel or SD_task_schedulev.
443 Data redistribution will be automatically scheduled once parent and child
444 are both scheduled. The filling of computation_amount and
445 communication_amount structures is now done seamlessly thanks to the chosen
447 * New function SD_workstation_dump to display various information
448 * New function SD_task_set_rate to throttle the bandwidth allowed to be used
449 by a SD_TASK_COMM_E2E typed task. This rate depends on both the nominal
450 bandwidth on the route onto which the task is scheduled and the amount of
452 To divide the nominal bandwidth by 2, the rate then has to be :
453 rate = bandwidth/(2*amount)
454 * Compute tasks that have failed can now be rescheduled and executed again
455 (from their beginning)
456 * Increasing source code coverage (src/simdag is now covered at 95.8%
460 * Re-implement time-independent trace replay using SMPI (at the
461 smpi_smp_* level) instead of MSG. This should replace
462 examples/msg/actions/actions.c
463 * Implement support of MPI Datatypes (vectors, hvectors, indexed,
464 hindexed and structs)
465 * Implement the exchange of non-contiguous data.
466 [Khalid Hasanov & Jean-Noel Quintin] Thanks for the patch, guys.
467 * Correct behavior of smpi/sender_gap and set its default value to 0
468 * Add option to asynchronously send small messages to allow better
469 simulation of pt2pt communications. --cfg=smpi/async_small_threshold:value
470 specifies the size in bytes under which messages will be asynchronously sent.
471 * Add support of MPI_Iprobe, MPI_Probe, MPI_Testall, MPI_Wtick functions
472 * SMPI now handles more MPI specific values in input. Closes [#14389] and [#14388]
475 * New C interface to define a platform: XML is now optional.
476 For more info, please check include/simgrid/platf.h.
477 * New interface to define random platforms from the C:
478 For more info, please check include/simgrid/platf_generator.h and
479 examples/msg/masterslave/masterslave_platfgen.c
480 * Export a sg_cmdline dynar containing all the arguments we got from
484 * Two new tracing options for adding comments to trace file so you
485 can track your experiments (see --help-tracing for details).
486 * New option to generate a impoverished trace file (--cfg=tracing/basic:1)
487 * Adding the SimGrid version that generated the trace file as a comment.
488 * Instrumenting other MSG functions (MSG_task_isend_with_matching and MSG_task_dsend)
489 * Fix to avoid key clashes on Paje links
490 * Other minor fixes related to the Paje specification
493 * Functions xbt_dict_hash() and xbt_dict_hash_ext() are made public,
494 and renamed to xbt_str_hash() and xbt_str_hash_ext().
495 * New function: xbt_os_timer_resume() to restart a timer w/o resetting it.
496 * Greatly improve the robustness of mmalloc to user errors (such as
497 using an area after freeing it, or freeing it twice)
499 -- Thu Oct 25 17:30:06 CEST 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
501 SimGrid (3.7.1) stable; urgency=low
504 * Restore the prototype of MSG_process_create_with_environment() to
505 the pre-3.7 situation by removing the kill_time argument.
506 * Add a MSG_process_set_kill_time() function instead.
509 * Fix weird behaviors when dealing with parallel tasks.
512 * Simgrid is now built as a dll.
513 * Simgrid-java now works on Windows.
514 * Simgrid-Java is now included into Windows package.
517 * First pre-build package for MacOSX.
520 * Fix compilation when using MSG_USE_DEPRECATED.
521 * Fix some compilation issues on Macs and Windows.
522 * Reduce the number of failing tests on exotic systems, like Debian/Hurd.
523 * Environment variables CFLAGS and LDFLAGS are now honored by cmake.
525 We discovered that the Lua console is broken, but we are missing the
526 manpower to fix it right now. The problem existed in 3.7 too, so we
527 are not blocking the release for that. Sorry if you depended on this
528 feature, any help would be really welcome.
530 -- Thu Jun 7 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
532 SimGrid (3.7) stable; urgency=low
534 The "spring cleanups (before the next Big Project kicks in)" release.
537 * We can specify the SMPI latency/bandwidth factor with command line
538 add --cfg=smpi/bw_factor:"threshold0:value0;...;thresholdN:valueN"
539 or add --cfg=smpi/lat_factor:"threshold0:value0;...;thresholdN:valueN"
540 You can also use the "config tag" from platform file by adding this line
541 <prop id="smpi/bw_factor" value="threshold0:value0;...;thresholdN:valueN"></prop>
542 (see "example/platforms/tag_config.xml" to use "config tag").
543 Note that the command line supersedes the platform file configuration.
544 * Change the correction factors used in LMM model, according to
545 the latest experiments described in INRIA RR-7821.
546 Accuracy should be improved this way.
547 * Use the partial invalidation optimization by default for the
548 network too. Should produce the exact same results, only faster.
549 * Major cleanup in surf to merge models and split some optimization
550 mechanisms from the core of the models. As a result you can now
551 specify which model to use (e.g., --cfg=network/model:LV08
552 --cfg=cpu/model:Cas01) and which optimization mode to use
553 (e.g., --cfg=network/optim:lazy --cfg=cpu/optim:TI).
554 Incompatible combinations should err at initialization. See
555 --help-models for the list of all models and optimization modes.
556 * The CLM03 workstation model was dropped for simplicity because it
557 used the deprecated CM02 network model. Use default instead.
558 * Rename the TCP_gamma configuration option to network/TCP_gamma
559 * Rename the coordinates configuration option to
560 network/coordinates, and document it
561 * Use now crosstraffic keyword instead of the terribly misleading
562 fullduplex keyword. It is activated by default now in the current
563 default model, use --cfg=network/crosstraffic:0 to turn it off.
564 * Ongoing refactoring the model parsing to make XML files optional
565 See include/simgrid/platf.h for details (still to be completed)
568 * Major overhaul of the documentation. Almost instructive now :/
569 * Deprecate the use of m_channel_t mechanism like MSG_task_{get,put}
570 functions and friends. This interface was considered as
571 deprecated since over 2 years, it's time to inform our users that it is.
572 Switch to MSG_task_{send,recv} instead, or compile SimGrid command line
573 'cmake -Dcustom_flags="-DMSG_USE_DEPRECATED" .' if you really need to
574 use these (crappy) functions in your code.
575 These functions will be removed soon. Stop using them now.
576 * Deprecate MSG_get_host_{table,number}
577 Implement MSG_hosts_as_dynar() instead.
578 * Implement MSG_processes_as_dynar() (Closes gforge #13642)
579 * Remove the public field msg_host_t->name. Use MSG_host_get_name()
582 * Stabilize the parallel execution mode of user contexts
583 * Introduce configuration variables to control parallel execution:
584 - contexts/synchro: Synchronization mode to use when running
585 contexts in parallel (either futex, posix or busy_wait)
586 - contexts/parallel_threshold: Minimal number of user contexts
587 that must be part of a scheduling round to switch to parallel
588 execution mode (raw contexts only)
589 * Fix bugs that prevented to use suspend/resume along with
590 synchronization structures.
591 * Fix bugs in process termination that lead to invalid memory access
592 in very specific conditions.
595 * Introduce a parallel mode for the models (controlled by surf/nthreads
596 configuration item). In our tests, running the models in parallel
597 never lead to any speedups because they are so fast that the gain
598 of computing each model in parallel does not amortizes the
599 synchronization costs, even when ultra fast futexes are used.
600 This is released anyway because YMMV.
603 * Performance boost by using a swag internally to compute the set of
604 tasks that are finished and should constitute the return value of
608 * Enable it by default now that it is considered rather stable.
611 * Documentation of the tracing functions.
612 * Performance gains when tracing categorized/uncategorized resource
613 utilization by avoiding calls to get route when updating resource
614 variables. LMM constraints are being used instead.
615 * API changed to set task categories. Use MSG_task_set_category instead
616 of TRACE_msg_set_task_category, and SD_task_set_category instead
617 of TRACE_sd_set_task_category. They only work if ENABLE_TRACING is ON.
618 * Bugfix for graphicator, routes not correctly obtained, memory leaks
619 * Examples for link user variables added (see at examples/msg/tracing/)
620 * Deprecated function TRACE_msg_set_process_category completely removed
621 * Trace header updated according to the latest Paje file format
622 * Tracing network lazy updates, no longer obligate users to use full updates
623 * --cfg=tracing/platform:1 also registers power/bandwidth variables
624 * Experimental: let user code declare/set/push/pop application states for hosts
625 * API changed to allow the manual creation of graph configuration files
626 for Triva. See TRACE_get_node_types() and TRACE_get_edge_types().
629 * Improve the API of Lua MSG bindings, using the Lua spirit.
630 * Each simulated process now lives in its own Lua world (globals are
631 automatically duplicated). It helps writing simulators. Will allow
632 to run Splay programs within SimGrid in the future.
633 * Add a Chord example in Lua, equivalent to the MSG one.
636 * Start the implementation of a solution to express temporal
637 properties, not only local assertions. This is still an
638 experimental work in progress, stay clear from it to be safe.
642 - Add new runtime parameters --help-logs and --help-log-categories
643 to display informations about supported logging parameters and
645 - Old deprecated parameters --{gras,surf,msg,simix,xbt}-log=...
646 don't exists anymore.
647 * Mallocators: allow value NULL for the reset function.
649 - New function xbt_dict_new_homogeneous(void(*)(void*)) to
650 create homogeneous dictionaries, where all the elements share the
651 same free function. Non homogeneous dictionaries will be
652 deprecated in the next release.
653 - Dicts of scalar elements (xbt_dicti_*) are deprecated.
654 - Multi-level dictionaries are deprecated.
656 - new function xbt_dynar_search_or_negative() that is useful when
657 you have less than 2 million elements in your dynar and don't
658 want of the extra complexity of catching exceptions when the
659 element is not found.
661 - Make xbt_os_thread module (for thread portability) public.
662 Documentation is still to come, sorry.
664 - Cleanups and simplifications to make it maintainable again.
665 - Exotic features (such as memalign and valloc) were removed.
666 - The metadata were extended and improved so that the
667 model-checker becomes able to explore and inspect the heaps.
668 - This may induce a performance drop when enable_model-checking is
669 ON in cmake (even if it's not used in the simulation), but it is
670 necessary at this point to get MC working.
672 Turn model-checking OFF if simulation performance matters to you.
673 Not enabling it at runtime is not enough, disable it in cmake.
675 -- Tue May 15 11:30:19 UTC 2012 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
677 SimGrid (3.6.2) stable; urgency=low
679 The "Not coding new stuff allows to polish old things" release.
682 * New bindings to the NS3 packet level simulator (experimental)
683 * Use the raw (efficient) execution contexts instead of the sysv
684 (portable) ones when possible.
685 * libpcre is now mandatory in any cases since not using it led to
686 severe performance loss and possibly other issues
687 * Update the XML platforms:
688 - G5K: include the latest machine in Nancy
689 - GridPP and LCG: new platforms
690 * Documentation was partially updated, at least (more to come)
692 Bug fixes, cosmetics and small improvements
693 * Free terminated processes before the end of the simulation to avoid
694 exhausting the memory of users having very dynamic amount of
696 * Bug fix and cosmetics about canceling non-running tasks
697 * Bug fix about the dot loader's issues when using libcgraph
700 * Create an installer for windows with nsis (amd64 and win32)
701 - Add an hello world project to illustrate simgrid project creation.
702 - Embed libpcre into the Simgrid installer to avoid
703 its compilation burden
704 * The raw execution contexts should work on Apple now
705 * Port to Windows 64 bits
706 - Sysv contexts now have an implementation for this arch
707 - GRAS communication features now support this arch
708 * Drop support for borland compiler on windows
709 - this code was not maintained, and we kinda depend on gcc nowadays
710 * Fix portability issues on kfreebsd/gnu: build error about semaphores
711 * Fix portability issue on unstable ubuntu: linker became picky on
714 -- Wed Oct 5 15:51:01 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
716 SimGrid (3.6.1) stable; urgency=low
718 The "Oops, we broke Macs too" release
721 * Fixed contexts detection so that raw ones are used when possible
722 * On Mac, do not use Posix Ucontexts with gcc v4.[1-5] since this
723 leads to a strange error, with user code segfaulting sometimes when
724 the generated code is not perfectly aligned (which is not
725 controllable from the user side, depends on the amount of code)
728 * New macro: CATCH_ANONYMOUS, which is like CATCH(e) but without argument.
730 -- Mon Jun 27 13:59:03 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
732 SimGrid (3.6) stable; urgency=medium
734 The Summer Release, also known as the "OMG! They Killed Kenny!" version
737 * Bindings now constitute their own package, separated from the main one.
738 Rationale: reduce our maintenance nightmare by reducing the module coupling
739 They will soon be released on their own on gforge.
741 svn co svn://scm.gforge.inria.fr/svn/simgrid/contrib/trunk/simgrid-java
742 svn co svn://scm.gforge.inria.fr/svn/simgrid/contrib/trunk/simgrid-ruby
744 GRAS: It is not considered as stable anymore, but experimental. Sorry.
745 * It's not quite deprecated for now because we have no replacement,
746 but it may soon become the case.
749 * New MPI functions supported: MPI_Comm_disconnect, MPI_Comm_get_name
750 * Fortran: New user-level cache variable to store the rank of the running
751 process. This improves performance by an order of magnitude.
752 * C: New coccinelle script to automatically locate and modify global and
753 local static variables.
754 * Improved SMPI network model with a sender-side gap to account for multiple
758 * New function MSG_comm_get_status(). MSG_comm_test() and MSG_comm_testany()
759 only say if a communication is finished, no matter whether it succeeded or
760 failed. You can call MSG_comm_get_status() to know the status of a finished
762 * New function MSG_task_dsend() to send a task and detach it. When a
763 communication is detached, you are never notified of its success or failure
764 and the memory is released automatically once it is finished. This function
765 is useful when you don't care about the end nor the success of a
767 * Change the prototypes of action replay. Sorry for inconvenience,
768 but this is really more efficient this way (and to adapt your code,
769 you just have to fix the initialization, that shouldn't be too long)
770 * Kill the braindead MSG_task_refcount_dec() function. I guess nobody
771 ever managed to do anything useful with it.
772 * New function MSG_comm_testany(). Similarly to MSG_comm_waitany(), it
773 takes a dynar of communications. It returns immediately and gives the
774 index of a finished communication (if any).
775 * New example: a basic implementation of the Chord P2P algorithm.
778 * New model for multi-core CPUs. You can now use the core attribute to
779 precise the number of cores of a host. This is a basic model. Every
780 process running on the host receives at most the power provided in
781 the DTD (throughput<=power). Total throughput of process cannot exceed
783 * New peer tag. This peer tag creates a tiny AS comprising a host and a
784 router linked by an up-link and a down-link (possibly asymmetrical).
785 This kind of pattern allows to easily build last-mile model style platforms.
786 Aggregating such patterns in a rule-based AS is thus the technique of
787 choice for modeling large peer-to-peer/volunteer computing/cloud platforms.
788 * New model for Vivaldi routing. We transformed the Vivaldi network model
789 into a Vivaldi routing model (based on the rule-based model). This allows to
790 combine Vivaldi based latencies with last-mile platforms.
793 * Added a check for NaN of IEEE754 infinite in the double entries of
795 * Introduce a new context factory "raw", highly inspirated from the
796 ucontext factory, but using manually crafted functions in assembly to
797 do the work in an efficient manner.
798 * Allow to change the used context factory at run time, not only at
799 compilation time. Use --cfg=contexts/factory:raw for maximal speed.
800 * Add an option --cfg=contexts/stacksize:N to set the stack size of the user
801 contexts at runtime (only with raw contexts or ucontexts).
802 * Completely rewrote this module to allow parallel execution of user
803 processes. Use --cfg=contexts/nthreads:N to execute user processes
804 with N parallel threads (the default is 1, meaning no parallelism).
805 * Allow to decide dynamically between sequential and parallel modes.
806 When nthreads > 1, you can use --cfg=contexts/threshold:P to run the user
807 processes in parallel only when their number is greater than or equal to P
809 * Added a check for NaN of IEEE754 infinite in the double entries of
813 * New command line option: if you pass --cfg=verbose-exit:0, SimGrid
814 won't output the state of processes when interrupted with Ctrl-C
815 * Add a new function xbt_dynar_to_array that transforms a dynar into a
816 NULL-terminated array. This may solve backward compatibility issues
817 due to the change to return type of SD_simulate. See also:
818 http://lists.gforge.inria.fr/pipermail/simgrid-user/2010-December/002206.html
819 * Add new macros with variable number of arguments.
820 - in xbt/log.h: XBT_DEBUG, XBT_VERB, XBT_INFO, etc.
821 - in xbt/asserts.h: xbt_assert
822 - in xbt/cunit.h: xbt_test_{add,fail,assert,log}
823 - in xbt/ex.h: THROWF and RETHROWF.
824 Define XBT_USE_DEPRECATED if you want to use the old numbered macros like
826 * Change xbt_die() to accept a format string with arguments, just like printf.
827 * New data structure: xbt_lib_t, like a dict but more general and with better
831 * New configuration options
832 Options triva/categorized and triva/uncategorized can be used to generate
833 graph configuration files for Triva visualization tool.
834 * Configuration option tracing/platform is renamed to tracing/categorized
835 * XBT logging makes tracing error checks easier, new root log hierarchy: instr
836 * New TRACE_user_link_variable interface:
837 User provides the name of the link and the tracing variable to attach to it
838 * the declaration of tracing categories must be done after the environment
840 * simpler tracing interface, just one way to declare categories
841 TRACE_category or TRACE_category_with_color, it is up to you
842 * links in the trace file are again identified by their names
843 * trace contains the full platform hierarchy exactly as declared using the ASes
844 * Options tracing/msg/[task|process]:1 groups the process by hosts
845 for both cases, tasks and processes must have names that are unique during the simulation
846 these options generate traces that are suited to gantt-charts, such as the space-time view of Paje
847 * The experimental option tracing/msg/volume is deprecated
848 its functionality may be reincorporated if needed
850 The tracing generates a trace file with unordered timestamped events,
851 because of the way the core simulator (surf) works. A script available
852 at the tools directory (fix-paje-trace.sh) can be used to put the events
853 in order. We have changed the tracing so it can generate ordered timestamped
854 events in the final trace, but depending on the simulator (and how much time
855 is simulated) that can lead to a huge memory utilization. It is deactivated
856 by default, but it can be activated using the --cfg=tracing/buffer:1 switch.
859 * Define a SIMGRID_VERSION macro in simgrid_config.h.
860 - We are trying hard to keep the API stable, but it may happen that
861 some things change (we're a research project after all, not a
862 nuclear plant operating system). If such things should happen, you
863 could rely on that macro to adapt.
864 - current value: 30600 for 3.06.00, aka 3.6
865 * Define macro MAKE_SIMGRID_VERSION(major, minor, patch) to help building
866 a number that can be compared with SIMGRID_VERSION.
867 * Add a build option -Denable_debug (set to ON by default): when set to OFF,
868 assertions and verbose/debug logging events are disabled at compile time.
870 -- Tue Jun 21 08:57:43 CEST 2011 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
872 SimGrid (3.5) stable; urgency=medium
875 * New feature to any SimGrid-based simulator: Model-Checking
876 Check SIN#1 for more details.
879 * New Model SMPI (three-interval linear regression for correction factors)
880 See RR-7426, available at http://hal.inria.fr/inria-00527150
881 * Ability to use FORTRAN MPI code (through f2c, automatically privatized)
882 * New MPI functions supported: MPI_Get_count(), MPI_Comm_split()
883 * New: RAM folding (see RR-7426 and examples/smpi/NAS/DT-folding)
884 * New: execution sampling (see RR-7426 and examples/smpi/NAS/EP-sampling)
885 * See also src/smpi/README
890 - Tracing API changes: TRACE_start and TRACE_end should not be called
891 by user-code. They are automatically called by simulators created
892 with SimDAG, MSG and SMPI if the toolkit is compiled with
893 tracing_enabled=ON. Categories declaration and utilization remain the
894 same for MSG and SimDag.
895 - A function was added to the tracing API to declare categories with
897 - TRACE_category_with_color (char *category, char *color)
898 where color must be in the following format
899 "%f %f %f", red, green, blue
900 and red, green, blue are float values in the interval [0, 1]
901 - User can specify NULL as color parameter, or continue calling
903 On that case, the tracing system will define random colors
904 - The following command-line options are supported:
905 --cfg=tracing/filename:msg.trace
906 --cfg=tracing:1 (activate tracing, needed to use others)
907 --cfg=tracing/platform:1 (categorized resource use)
908 --cfg=tracing/uncategorized:1 (uncategorized resource use)
909 --cfg=tracing/msg/task:1 (task creation)
910 --cfg=tracing/msg/process:1 (process creation, migration)
911 --cfg=tracing/msg/volume:1 (volume of MSG send/recv)
912 --cfg=tracing/smpi:1 (SMPI interface tracing)
913 --cfg=tracing/simdag:1 (allow SimDAG tasks receive categories)
914 - examples of examples/msg/tracing updated
916 - DAXLoader and DOTLoader functions can generate tasks with categories
917 - A new function to attribute a category to SD tasks:
918 TRACE_sd_set_task_category (SD_task_t task, char *category)
919 * Tracing the MPI interface implemented by SMPI
920 - Collective operations are traced with states
921 - Point-to-Point operations are traced with states/links
922 - Tracing activated by a parameter "-trace filename" passed
923 to smpirun during execution (considering that simgrid
924 is compiled with tracing enabled)
925 - To run the simulation with gdb, the simulator
926 accepts --cfg=tracing/smpi:1 to trace SMPI
927 - tesh files to check if smpi tracing is ok
928 - See examples/smpi/NAS/DT-trace
929 * GTNetS tracing re-worked
930 - adaptation to the tracing system of GTNets to cope
931 with modifications regarding the fullduplex mode
932 - new tesh files to check if gtnets tracing is ok
935 * Asynchronous communications through the functions:
936 MSG_task_isend/irecv and MSG_comm_test/wait/waitall
937 * New function: MSG_load_platform_script()
938 to make possible using a lua script instead of XML files to set up platforms
939 * New function: MSG_set_function
940 to associate functions to processes, used when bypassing the parser
941 * New functions: MSG_task_set_name(), MSG_task_set_compute_duration()
943 Platforms: Add some more examples in examples/platforms
944 * Grid'5000: see www.grid5000.fr
945 * *_30000_hosts.xml: various huge files [mainly scalability testing]
948 * Change the XML format. This is a very important modification. SimGrid
949 3.5 introduces a new hierarchical format based on the notion of
950 Autonomous Systems. Compatibility with old format is ensured
951 through the perl script provided in the install bin directory
952 bin/simgrid_update_xml.
953 It is now possible to build platforms with specific routing
954 mechanism (Full/Dijkstra/DijkstraCache/Floyd) and to easily
955 connect several platforms together. We will try to provide soon
956 set of realistic platforms exploiting these properties (have a
957 look at examples/platforms/ for the moment).
958 * Take the opportunity of the XML format change to be a good XML citizen:
959 rename link:ctn to link_ctn and similar changes (also dealt with by
961 * Add a new routing scheme (rule-based) using regular expressions. It
962 enables to have an extremely low memory footprint when the
963 underlying routing is simple and can be compactly described. You
964 need to have libpcre4-dev (perl regular expressions) installed if
965 you want to use this routing scheme.
966 * Revive the cluster TAG and allow to easily and efficiently (both in
967 term of memory and speed) connect clusters together. Have a look
968 at teshsuite/simdag/platforms/ to see how this can be done. With
969 this tag, you can create clusters with thousands of tasks at no
970 cost (have a look at examples/platforms/).
971 Note: clusters are implemented as ASes, so there is no need for an
972 enclosing AS tag if you have only one cluster in your platform.
973 * Add new generic functions in the public interface that allows the user
974 to call SURF 'create_resource' methods from your code (same
975 functionality as the XML bypass mechanism but with a much lighter
977 * Add a new model (enabled through command line --cfg=network/model:SMPI)
978 that uses a piecewise linear approximation to produce better
979 results when exchanging small messages.
980 * Add a new parameter to handle correctly full duplex link and account
981 for interferences between uplink and downlink communications
982 (activate with --cfg=fullduplex:1).
985 * Rename the SD_READY (all dependencies are satisfied and task is
986 scheduled) state in SD_RUNNABLE and define a new SD_SCHEDULABLE (all
987 dependencies are satisfied) state.
988 This prevents a confusion between the notion of "ready to schedule"
989 (SD_SCHEDULABLE) used in DAG scheduling and that of "ready to be
990 simulated" (SD_RUNNABLE) used by the simulation kernel.
991 * Change the way a task is considered as ready. Instead of removing
992 dependencies when a task is done, a counter is decreased. This way,
993 it is always possible to reach ancestors thanks to the
994 SD_taks_get_parents function (even after the end of the simulation.)
995 * Change the return type of SD_Simulate from (SD_task_t*) into
996 xbt_dynar_t. This function was in handling a dynar internally and
997 converted it into a NULL terminated array for historical reasons.
998 * New function SD_dotload(char*) to load a DAG described in dot
999 format. This loader and the corresponding examples require the
1000 installation of the graphviz library.
1001 * Fix a bug in the management of tasks of size 0 in the surf network
1002 models. This problem was only visible with SIMDAG and you should
1003 thus disregard results produced with earlier versions if you
1004 relied on this feature (some tasks were blocked because of this).
1005 * Fix a bunch of stuff that prevented to use classical models with SIMDAG
1006 even though your applications were doing only point-to-point
1007 communications and sequential computations. Now you can really use any
1008 model you want (of course, if you create real parallel tasks, which are
1009 not implemented in most models beside ptaskL07, this will abort).
1010 * Add an example that schedules a DAX on an heterogeneous platform
1011 using a Min-Min strategy.
1012 * New function SD_workstation_get_current_task() that returns the kind
1013 of task currently running on a workstation in the sequential access
1015 * Raise some warnings when unexecuted tasks remains at the end of the
1016 simulation. This is usually caused by cycles in the DAG.
1019 * New function: SIMIX_process_set_function() called by MSG_set_function
1020 * Change the underlying waiting queue in semaphores so that a process
1021 can wait on several of them simultaneously (as in waitany).
1022 * Fix the way to handle tokens in semaphores so that all access patterns
1023 work: {acquire, acquire_timeout, waitany} / {release, release_forever}.
1024 * kill the dirty pimple SIMIX_message_sizes_output()
1025 Please use (proper) visualization instead
1028 * New data container: setset (set of sets of elements)
1029 * New module: mmalloc (mapped malloc, allowing to have several
1030 independent segments of malloc)
1031 * New function: xbt_dict_cursor_set_data()
1032 * New functions: xbt_dynar_sort(), xbt_dynar_compare()
1033 * New function: xbt_dynar_is_empty()
1034 * New function: xbt_fifo_get_last_item()
1035 * Fix xbt_dynar_shrink(): use the right element size.
1036 * Fix xbt_dynar_set*(): allow index larger than current size and memset 0
1037 uninitialized areas during expand.
1038 * Fix semaphores: previous implementation was severely broken.
1039 * Use library init/fini functions for our initialization.
1040 - you can use logs and other feature as soon as you want in your
1041 code (even before the xbt_init / MSG_init)
1042 - xbt_exit is now a no-op and produce a warning when used.
1045 * Port GRAS to new SIMIX mechanisms. This allows gras users to
1046 benefit from the latest improvement to the simulation kernel.
1047 * Kill measurement sockets for now. If you rely on them, sorry. This
1048 release is not for you. This feature will be reintroduced in the
1049 future, but we cannot delay the release any further.
1050 * New function: gras_msgtype_get_name().
1051 * Implement gras_agent_spawn in RL too (the prototype changed a bit)
1052 * Fix (at last) the pmm example: it should not randomly fail anymore.
1054 Build chain: bug fixes and overall polishing
1055 * Cmake is now stable enough. Hence, we killed the autotools.
1056 * Port to windows ( TM :)
1057 * Fix the 'make install' target.
1058 No need to use 'make install-simgrid' anymore
1059 * Introduce a 'make dist' target compiling a *source* archive
1060 'make package' compiles a binary archive
1061 * Compile java files only on need
1062 * Add --cd and --setenv command line options to tesh
1063 * Out of source builds are not fully supported yet, but we are close
1064 * Enable supernovae and optimization flags by default for our users
1067 * Add layer to set up environment directly from lua, without XML.
1068 * The effect of gras_stub_generator can be achieved through
1069 lua too (check examples/gras/console/ping_generator.lua)
1071 -- Wed, 01 Dec 2010 22:09:23 +0100 Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
1073 SimGrid (3.4.1) stable; urgency=low
1075 The "Polishing easter eggs is probably a good idea" release.
1076 This is a bug fixes release only.
1080 * Fix a bug preventing the tasks from begin garbage collected.
1083 * Fix a bug occuring when a host involved in a communication fails.
1084 This was not detected properly by the other peer involved in the
1085 communication. Now, it's reported as a network error.
1088 * Warn the user about loop dependencies in data flow of DAX files
1089 * Obey the control-flow dependencies of DAX files
1092 * Add option "enable_smpi" allowing to not compile SMPI.
1093 Probably useful for the (Mac) users experiencing a build error here
1094 * Improve the detection of lua5.1 and ruby1.8
1096 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Tus, 04 May 2010 28 16:11:16 +0100
1098 SimGrid (3.4) stable; urgency=low
1100 The "Easter in Cargese" release. Also known as (major changes):
1102 * the "se habla Java, Ruby 話せます, fala-se Lua (and deaf-friendly)"
1103 ~> bindings were greatly improved
1104 ~> new tracing infrastructure for better visualization introduced
1106 * the "Welcome to configury modernity" release.
1107 ~> we switched from autotools to cmake, and improved our cdash
1110 A more detailled list of changes follow (full detail in svn log).
1112 Java Bindings: Various Cleanups
1113 * (install java-gcj-compat-dev on debian-like to use them)
1114 * Remove put/get: no need to export deprecated interface in Java
1115 Use send/receive instead.
1116 * Cleanup the examples and add a README per directory
1117 * Remove example autoDestination (that's the only way to go now)
1118 * Remove example explicitDestination (was a plain copy of basic)
1119 * Make JniException a runtime exception, so that there is no need to
1120 declare the fact that you may encounter such a beast. I guess that
1121 nobody will ever want to survive such error.
1122 * Create specific errors for each MSG case of failure:
1123 host failure, transfer failure, timeout, task cancelled
1124 * Cleanup the exceptions that may get thrown by each function
1125 * Other internal cleanups in Java bindings. Performance still bad :/
1126 Ruby and Lua Bindings: create them
1127 * (install ruby1.8-dev/liblua5.1-0-dev on debian-like to use them)
1128 * That's new and great, you should try them out.
1129 Same functionalities than Java bindings, only even less polished
1131 * Kill the useless "rate" argument of SD_task_get_execution_time()
1132 Everyone used to provide -1 as a value, it was not used, and the
1133 semantic of a possible use wasn't even clear.
1134 * SD_SCHED_NO_COST: Constant to use as cost in SD_task_schedule()
1135 either as comm costs or compute costs to mean that there is no
1136 such thing for that specific task.
1137 * Add a SD_task_set_name() function
1138 * Fix SD_task_unschedule() on typed tasks
1139 * Fix SD_task_get_execution_time() to return seconds, not flop*sec
1140 * In DAX loader, accept useless 'level' attributes to <job> since
1141 LIGO DAGs have them (seem to be to ease graphical representation).
1143 * Add an example masterslave_mailbox.c using send/receive and not
1144 the deprecated put/get interface.
1145 * Kill the MSG_paje_output() function. It's a noop since 2 years.
1146 * Kill MSG_WARNING and MSG_FATAL return codes: they were not used
1148 * Rename MSG_TIMEOUT_FAILURE into MSG_TIMEOUT for sake of logic
1149 (declare MSG_USE_DEPRECATED to still have the old name)
1150 * Add a MSG_task_set_data() function
1151 * About trace replay (see examples/msg/actions):
1153 - Allow to work with splitted trace files for each process
1154 Give the specific trace file as argument of each process,
1155 and call MSG_action_trace_run(NULL)
1156 You can still have one merged file for all processes.
1157 - Fix implementation of collective operations
1158 * Allow task_execute() on 0-sized tasks (closes #10063)
1160 * This is the first release of SimGrid where SMPI is not considered
1161 beta anymore (even if some corners should still be improved)
1162 * Port over the new SIMIX_network submodule (internal refactoring)
1163 * Basic support to log events as with SMPE (use --cfg=SMPE:1)
1164 * Implement more missing elements of the standard:
1166 - MPI_MAXLOC MPI_MINLOC + all associated datatype MPI_DOUBLE_INT,
1168 - MPI_Address() MPI_Get_count() MPI_Type_free() MPI_Type_extent()
1169 MPI_Scan() MPI_Get_processor_name()
1170 - Added implementation of missing case for Alltoall (warning: it's
1171 *not* the bruck variant from OpenMPI; based on Alltoallv instead)
1172 - SMPI_MPI_Gather() SMPI_MPI_Gatherv() SMPI_MPI_Scatterv()
1173 SMPI_MPI_Reduce_scatter() SMPI_MPI_Allgather()
1174 SMPI_MPI_Allgatherv()
1175 * Bug fixes include:
1176 - MPI_Waitsome() was broken
1177 - Allow relative includes in smpicc
1178 - Command line cfg argument 'reference_speed' was ignored...
1179 - Some functions did not properly lead to auto-benching of user code
1180 - smpicc passes -O2 by default (just like openmpi one)
1182 * add SIMIX_action_suspend() and SIMIX_action_resume() functions
1183 * Bug fixes about timeouts during communications
1184 * add SIMIX_message_sizes_output() as a pimple to write to file the
1185 amount of messages per size. Use gnuplot to get histogram.
1186 Pimple because that's the only user-visible function of simix,
1187 defined directly in xbt.h (irk, sorry)
1189 - Add a SIMIX_sem_get_capacity() function
1190 - Fix interactions with processe resume/suspende
1191 - release_forever() was stupidly broken
1192 - Fix SIMIX_display_process_status() for processes in a semaphore
1193 - Make SIMIX_sem_block_onto() user-visible
1194 * Refactoring context stuff:
1195 - Use pseudo-OOP for better modularity
1196 - reimplement SIMIX_process_kill() without process_schedule() so
1197 that the latter can take as invariant that it is called from
1199 - Merge context_start into context_new for sake of simplicity
1201 * Add a Vivaldi network model, coded live during SUD'10 ;)
1202 * Rename configuration variables to start a hierarchy:
1203 o cpu_model -> cpu/model
1204 o network_model -> network/model
1205 o workstation_model -> workstation/model
1206 * New configuration variables:
1207 o network/bandwidth_factor: correction to bandwith
1208 o network/latency_factor: correction to latency
1209 o netwotk/weight_S: correction to the weight of competing streams
1210 * Add a long description to the models, that users can see with such
1211 argument on the command line: --cfg=cpu/model:help
1212 * --help-models display the long description of all known models
1214 * config: add the ability to set a default value after registration
1215 Does not override any previously set value (e.g. from cmd line)
1216 * dict: allow to have integer key and data.
1217 When so, you need to use the following functions
1218 void xbt_dicti_set(xbt_dict_t dict, uintptr_t key, uintptr_t data);
1219 uintptr_t xbt_dicti_get(xbt_dict_t dict, uintptr_t key);
1220 void xbt_dicti_remove(xbt_dict_t dict, uintptr_t key);
1221 In contrary to regular dicts, the key is not malloced before copy.
1222 Mixing scalar and regular elements in the same dict is not tested
1224 * Allow to use xbt_dynar_shrink() to expend the dynar instead
1225 Tracing for Visualization:
1226 * SimGrid is now instrumented in order to generate a trace file for
1227 visualization analysis: to use it, need to compile SimGrid with the
1228 "tracing" option enabled, and instrument the program using SimGrid with
1229 TRACE_start, TRACE_category, TRACE_msg_set_task_category and TRACE_end
1230 (among other functions).
1231 * The instrumentation only traces the platform utilization for now
1232 * Documentation to use the tracing functions and how to analyze the
1233 traces with the Triva tool is written.
1234 * More information about: SimGrid FAQ (in the section Tracing Simulations
1237 * We moved to cmake as default build system. Autotools support will
1238 be dropped soon. Check the FAQ for more info about how to use it.
1239 * Greatly improved our cdash/ctest interactions
1240 Check http://cdash.inria.fr/CDash/index.php?project=Simgrid
1241 * Added memory checking tests with valgrind; lot of memleak fixing.
1242 This may be the first release of simgrid with so few memory issues
1243 * Added code coverage tests.
1244 Our coverage is still improvable, but at least we see it on cdash.
1246 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Wed, 28 Apr 2010 28 17:11:16 +0100
1248 SimGrid (3.3.4) stable; urgency=low
1250 The "Desktop Grid needs love too" release (also called Xmas release).
1252 Models improvements:
1253 * Major speedup in the maxmin system solving by using lazy evaluation
1254 Instead of solving completely the maxmin system at each iteration,
1255 only invalidate (and recompute) the modified parts.
1256 This new feature is enabled in default models but you can try to
1257 turn it on with "--cfg:maxmin-selective-update=1" for other models.
1258 * Cas01 IMproved as default CPU model
1259 This CPU model is the same Cas01 model, but it uses the
1260 maxmin-selective-update flag and a heap structure to manage
1261 actions on SURF kernel.
1262 It reduces the complexity to find the next action to finish and,
1263 consequently, it's faster than the old Cas01.
1264 This is the new default CPU model (Cas01).
1265 * Rename the old Cas01 model to Cas01_fullupdate
1266 Keep the old cpu model Cas01 with the new name of Cas01_fullupdate.
1267 Use "--cfg=cpu_model:Cas01_fullupdate" to use the old default CPU model.
1268 * CpuTI (CPU Trace Integration)
1269 A new CPU model whose objective is simulate faster when using
1270 availability trace files.
1271 Instead of using a full featured, over engineered maxmin system for
1272 CPU modeling, this model does the pre-integration of traces files
1273 to calculate the amount of CPU power available, and so, executes
1274 faster than the old CPU models.
1275 Use "--cfg=cpu_model:CpuTI" to change to this CPU model.
1276 * Use LV08 as default network model since it gives better accuracy
1277 for small messages and shouldn't change things for big ones.
1278 Use --cfg=network_model:CM02 to get the previous behavior.
1281 ******************************************
1282 *DO NOT MIX 3.3.4 RESULTS WITH OLDER ONES*
1283 ******************************************
1284 * The new CPU model may changes simulations!
1285 The point is that events occurring at the exact same timestamp
1286 are not scheduled in the same order with the old and new
1287 version. This may be enough to completely change the execution
1288 of simulations in some cases.
1289 * The new network model will change simulations!
1290 This new model is more realistic than the previous one, so you
1291 should consider redoing your old experiments with this model.
1292 Sorry for the inconvenience.
1295 * Introduce the supernovae compilation mode
1296 When compiled that way, the whole SimGrid (or almost) is put in a
1297 single compilation unit and compiled in one shoot.
1298 This is to help gcc which has difficulties to inline stuff from one
1300 The speedup seem to be above 15%, althrough more tests are needed on
1301 amd64 to confirm that gain.
1304 * Port of MSG's mailbox on top of SIMIX network
1305 The put/get mechanism was greatly simplified on the way.
1308 * New SIMIX network module. Provides:
1309 - Mailbox: rendez-vous mecanism to find with who you want to speak
1310 - Synchronous send/recv: easier and hopefully faster since the
1311 logic is handled in the maestro process directly now
1312 - Asynchronous send/recv: you dreamt of it? It's here now
1313 Too bad that nobody cared enough to propagate the change to MSG.
1314 * Add semaphores as SIMIX synchronization mechanism.
1317 * new function SD_daxload(char*) to load a DAX file
1318 (see http://vtcpc.isi.edu/pegasus/index.php/WorkflowGenerator)
1319 * Introduce typed tasks. Specify its kind and cost at creation.
1320 At scheduling, just give where it should be placed, and the cost
1321 for each involved resource is automatically computed.
1322 Existing constructors so far (more to come of course):
1323 - SD_task_create_comm_e2e() for end-to-end communication
1324 - SD_task_create_comp_seq() for sequential computation
1325 Use SD_task_schedulev() / SD_task_schedulel() to schedule them.
1326 * new function SD_task_dump() for debuging display
1327 * new function SD_task_dotty(task,FILE*) writing to file the info
1328 about the task in dotty format
1329 * SD_task_dependency_exists() can now cope with having one of its
1330 arguments NULL. If so, it tests whether the other argument has any
1332 * Add getters on list of preceding/following tasks:
1333 SD_task_get_parents(task) and SD_task_get_children(task)
1334 * Add getters on amount of workstations and list:
1335 SD_task_get_workstation_count(t) and SD_task_get_workstation_list(t)
1336 * Add getter on task kind: SD_task_get_kind(task)
1337 * Update the start_time and finish_time of tasks on completion/failure
1338 * Bugfix: Remove task from state swags when destroyed
1341 * New function: void gras_cpu_burn(double flops) -- a simple CPU burner
1344 * New function: xbt_dynar_dopar(dynar,fun) to map a function over the
1345 dynar with one separate thread per value of the dynar.
1346 * Change the prototype of xbt_thread_create(), sorry.
1347 Added a boolean parameter indicating whether we want to join this
1348 thread (used in SG only for now)
1349 * Implement xbt_thread_join and xbt_thread_yield in SG also.
1352 * GTNetS wrappers should now be usable again (and betterly tested too)
1353 * Fix a major regression from 3.2 where the timeout provided to
1354 MSG_task_put_with_timeout() was used as absolute time before which
1355 the comm should be done.
1356 * Start to fix the <cluster> tag.
1357 - Internal links should be good now (beside of the loopback, which
1358 use the private link instead)
1359 - paths to the external world is still rather broken
1360 - the <route:multi> tag is just broken. Actually that's brain-dead.
1361 We need sth like <route:multi src="myCluster" dst="$*-${myCluster}">
1362 to make it less stupid
1363 ** Check your platform with teshsuite/simdag/platforms/flatifier **
1364 * Fix a source-level compatibility glitch from 3.2: after defining
1365 MSG_USE_DEPRECATED, you can use the old name
1366 MSG_task_put_with_time_out() for MSG_task_put_with_timeout()
1367 * Allow to compile from the SVN with automake 1.11
1368 * Fix some problems when using the "start_time" tag in deployment XMLs.
1369 * Fix #8569: XBT/synchro.h has redundant declarations
1370 * Fix #8563: MSG return values and exceptions
1371 Introduce a MSG_TIMEOUT_FAILURE return code and use it consistently.
1372 * Integrate patch #8636: Obey DESTDIR when installing documentation.
1373 Thanks to Robson Peixoto.
1374 * Fix a vicious bug in dictionaries inducing that some elements were
1375 not freed on xbt_dict_free()
1377 Portability report of this version:
1378 * Main portability targets:
1379 - linux (ubuntu (804/810/910) /debian (4/5/testing) /fedora (core11))
1380 on (amd64/i386/ia64)
1381 - mac leopard on i386
1382 Known problems: http://cdash.inria.fr/CDash/index.php?project=Simgrid
1383 but nothing critical.
1384 * Other platforms: windows, AIX and others were not tested for this release
1386 Timing report of this version:
1387 * Lazy evaluation brings arbitrary speedup (ie, speedup depending on
1388 scenario parameters). From 8h to a few seconds in desktop grid settings.
1389 * Supernovae brings about 25% speedup on i386.
1391 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 24 Dec 2009 19:07:39 +0100
1393 SimGrid (3.3.3) stable; urgency=low
1395 The "Need for Speed" release.
1397 The timings done to validate the 3.3.2 were faulty.
1398 Instead of being 5% faster, it was 15% slower (compared to 3.3.1).
1400 The problem was a conversion from a manually handled vector to
1401 xbt_dynar_t on the critical path.
1402 xbt_dynar_foreach calls functions, inducing stack management crap.
1404 We inlined these functions and xbt_dynar_foreach is now breath taking.
1405 We also inlined xbt_swag_belong on the way.
1407 Here are some approximate speedup measurements (on master/slaves
1408 simulations lasting between 10s and 20s each):
1409 3.3.1 -> 3.3.2: about same performance
1410 3.3.2 -> 3.3.3: 40% speedup
1411 3.3.1 -> 3.3.3: 40% speedup
1412 3.3.1 with inline patch -> 3.3.3: 30% speedup
1414 Our reading is that the refactoring which occurred in 3.3.2 made us
1415 suffer much more from the xbt_dynar_foreach low performance, but
1416 once we solved this, this refactoring proved to be very performance
1417 effective. From the 40% speedup, somehow, 10% are due to the
1418 inlining and 30% to the refactoring.
1420 That's a pitty that gcc cannot inline functions placed in other files
1421 alone. We have to choose between:
1422 - break the encapsulation (by putting private data structures and
1423 accessors in headers files to help gcc)
1424 - live with low performance
1425 - switch to a decent compiler such as icc (not quite possible).
1427 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 20 Aug 2009 21:21:33 +0200
1429 SimGrid (3.3.2) stable; urgency=low
1431 The "Simplicity does not preceed complexity, but follows it" release.
1433 The main contributors of this release were (lexical order):
1434 Silas De Munck, Stéphane Genaud, Martin Quinson, Cristian Rosa.
1437 * Extract the routing logic into its own object.
1438 (was dupplicated in network.c and workstation_LV07.c;
1439 Allows to implement other ways of storing that info)
1440 => kill now useless network_card concept
1441 - Use dynar to represent routes (instead of void** + int*)
1442 - kill link_set (use surf_network_model->resource_set instead)
1443 - Add a command-line option to choose the routing schema to use
1444 - Add three new models:
1445 * Floyd (shortest path computed at initialization)
1446 * Dijikstra (shortest path recomputed all the time)
1447 * Cached Dijikstra (shortest path computed on need)
1448 All these models where contributed by Silas De Munck, and are
1449 described in his ICCS09 paper.
1451 * Simplify model declaration
1452 (less redirections, less function to write when defining a model)
1453 - Factorize stuff between models:
1456 surf_model_resource_set(model)
1457 surf_model_resource_by_name(model, name)
1458 - Unify the types of models in s_surf_model_t (using an union)
1459 - Embeed fields of common_public directly into s_surf_model_t
1460 - Rename model methods:
1461 action_free ~> action_unref
1462 action_change_state ~> action_state_set
1463 action_get_state ~> action_state_get
1464 - Change model methods into functions :
1465 (model)->common_public->action_use ~> surf_action_ref
1467 * Implement a generic resource; use it as ancestor to specific ones
1468 (allows to kill duplicated code in models)
1469 Drawback: timer command don't need no name nor properties;
1470 workstation_CLM03 don't need no properties
1471 (but I guess we can live with those few bytes wasted)
1473 * Improve the action object model
1474 - implement a constructor avoiding dupplicated code about field
1475 initialization in generic_action part.
1477 * Kill the SDP model: it has an external dependency, is deprecated
1478 in flavor of modern lmm models, and didn't compile since a while
1481 * Relocation of the context module from XBT to SIMIX.
1482 (the context were decoupled from the simix processes, duplicating a lot of code)
1483 => a lot of code was factorized
1484 - less overhead is introduced during scheduling
1485 - simpler API for the context factory
1486 - the logic for process creation,destruction and manipulation was simplified
1487 * Simplification of the s_smx_process_t data structure.
1488 => accesing the simix level data associated to a process is faster now,
1489 and the code is a lot more readable.
1492 * Implement some more MPI primitives:
1493 MPI_Bcast, MPI_Waitany, MPI_Waitall, MPI_Reduce, MPI_Allreduce, MPI_Scatter, MPI_Sendrecv, MPI_Alltoall
1494 -implementation: Bcast: flat or 2-ary tree (default),
1495 Barrier: 4-ary tree,
1497 Allreduce: Reduce then Bcast
1498 Alltoall: "basic_linear" if data per proc < 3Kb, "otherwise pairwise".
1499 Not yet implemented: "Bruck" for data per proc < 200b and comm size > 12
1500 Alltoallv: flat tree, like ompi
1502 * Add support for optimized collectives (Bcast is now binomial by default)
1503 * Port smpirun and smpicc to OS X
1506 * Kill SD_link_get_properties: hard to maintain and makes very little sense
1507 Shout out if you used it.
1510 * Display the list of still queued messages in SG mode when existing
1514 * Add xbt_set_get_by_name_or_null() [Silas De Munck]
1515 * Add xbt_graph_node_get_outedges() [Silas De Munck]
1516 * Add xbt_str_from_file(FILE*)
1517 * Add xbt_dict_get_key achieving a linear reverse search
1518 * Remove the context module
1520 Portability report of this version:
1521 * Main portability targets:
1522 - Linux(debian)/x86/context
1523 - Linux(debian)/x86/pthreads
1524 - Linux(debian)/amd64/context
1525 - Linux(debian)/amd64/pthreads
1526 On these, we still have the eratic breakages of gras/pmm and
1527 amok/saturate_sg reported in previous version. We still think
1528 that the tests are the cause of the fault, not the tested code.
1530 - Mac OSX Leopard/x86/context
1531 Still false negative in tesh autotesting.
1532 Smpi still fails, but this time because readlink does not accept -f
1533 Everything seems to work properly beside of that.
1536 - AIX version 5.3 (only tested contexts this time)
1537 Smpi still fails there because mktemp is not installed.
1538 Everything seems to work properly beside of that.
1540 I managed to compile it for the first time, but several breakages.
1541 Won't delay the release for this exotic platform.
1543 * Windows: it's still lagging behind. If you want to help, please
1546 Timing report of this version:
1547 This version seem to be more than 5% faster than 3.3.1 (on linux
1548 64bits with contextes). The gain is less than expected, we are
1549 investigating this for next release.
1551 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Wed, 19 Aug 2009 17:07:12 +0200
1553 SimGrid (3.3.1) stable; urgency=low
1556 * Implement a --cfg-help to show existing configuration variables
1557 * Build chain do not require doxygen in maintainer mode
1560 * fix a bug on struct sizeof computation, which prevented the
1561 exchange of arrays of structs in some conditions
1562 - added a regression test about this in datadesc_usage
1563 * Allow the exchange of 0-long dynamic vectors.
1564 - for that, use -1 as indicator of dynamic size instead of 0
1565 - This implied to change any size from unsigned long to long,
1566 reducing a bit communication abilities, but I guess that with
1567 64bits being quite common, this is more than enough.
1568 - This also induce a protocol change, thus bumping network protocol
1569 version from 0 to 1 (if we have external users, we have to get
1570 clean on that point too ;)
1571 - added two regression tests about this in datadesc_usage
1572 * Be more verbose when propagating local exceptions
1573 This helps debugging.
1574 * Display the status of simulated processes when receiving SIGINT in
1578 * Allow to control the simulation from a trace file.
1579 New functions MSG_action_register() and MSG_action_trace_run()
1580 The first one allows to associate a function execution to each
1581 kind of action while the second one parses a trace file and
1582 triggers the corresponding actions within the system.
1583 For now, only a toy example is provided in examples/msg/actions
1584 * Add an exemple of process migration in examples/msg/migration
1585 * Fix a bug in task exchange which broke MSG_task_get_sender()
1586 Add a teshsuite regression test for that.
1587 [Bug: if MSG_task_get_sender() is called after sender exit,
1589 * Fix a bug which prevented suspend/resume to work properly
1590 * Display the status of simulated processes when receiving SIGINT
1591 This fixes a regression of v3.3. due to the introduction of SIMIX
1592 * Bug fixing in failure management:
1593 - trace could not start by a failure at time 0
1594 - failure during communications were not working
1597 * Add SIMIX_process_set_name() to change the name of the current
1598 process in the log messages.
1599 * Store smx_hosts in a dict since we only retrieve them by name
1600 * Move the configuration infrastructure to surf
1603 * Move the configuration infrastructure to surf
1606 * Massive internal cleanups:
1607 - Store internal structures on processes instead of hosts (allows
1608 to have more than one process per host, in addition of being more
1610 - Cleanup the initialization/finalization process
1611 - Kill a whole bunch of unneeded synchronization:
1612 processes run in exclusive manner within the simulator
1613 - Move queues from global tables to process data fields
1615 - now accept -platform and -hostfile arguments
1616 - Pass the right rank value to processes according to the hostfile
1617 * Compile the examples by default, and use them as regression tests
1618 * Implement MPI_Wtime()
1619 * Change the reference speed to a command line option
1622 * TCP_gamma can now be specified as command line option using
1623 --cfg=TCP_gamma:10000000.0
1624 * Change the --surf-path cmd line option into --cfg=path:
1627 * Also include strbuff from xbt.h public header
1628 * xbt_ex_display(): do not free the exception after displaying
1629 This allows to do more with the given exception afterward.
1630 Users should call xbt_ex_free() themselves.
1634 Portability report of this version:
1635 * Main portability targets:
1636 - Linux(debian)/x86/context
1637 - Linux(debian)/x86/pthreads
1638 - Linux(debian)/amd64/context
1639 - Linux(debian)/amd64/pthreads
1640 These targets fail about 1/10 of times on gras/pmm, but we believe
1641 that this is because of the test, not because of simgrid.
1642 amok/saturate_sg fails even more rarely, and the test may not be
1645 - Mac OSX Leopard/x86/context
1646 The test suite still spits tons of errors because some obscure
1647 force prevents us from removing the temporary directories
1648 arguing that they still contain some metadata I've never heard of.
1649 Smpi fails because seq is not installed.
1650 Everything seems to work properly beside of that.
1653 - AIX version 5.3 (both contexts and pthread)
1654 Smpi still fails there because mktemp is not installed.
1655 XML inclusions seems rosty on AIX.
1657 * Windows: it's still lagging behind. If you want to help, please
1660 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Sat, 27 Jun 2009 00:14:30 +0200
1662 SimGrid (3.3) stable; urgency=high
1666 * JAVA BINDINGS for MSG (you dreamt of them? We made them)
1667 [Malek Cherier & Mt]
1669 * Introduce the SIMIX module: factorize code between MSG and GRAS.
1672 Until now, GRAS were using MSG as an interface to SURF. It was
1673 quite difficult because both interface have several differences
1674 (MSG channels vs GRAS sockets were the most notable point).
1676 This also opens the gate to SMPI (which should occur soon) and speed
1677 up simulations by to 40% (even if it were not the main goal).
1679 **************************************
1680 *DO NOT MIX 3.2 RESULTS WITH 3.3 ONES* Simix may changes simulations!
1681 **************************************
1682 The point is that events occuring at the exact same timestamp are
1683 not scheduled in the same order with the old and new version. This
1684 may be enough to completely change the execution of simulations in
1685 some cases. Sorry for the inconvenience.
1687 * Cleanup and upgrade the XML format to push further scalability
1688 issues (check http://hal.inria.fr/inria-00256883/ for more info)
1690 * Improve the testing infrastructure with tesh. Now a very large part of
1691 the code is tested not only by being run but also by checking that the
1692 output match an expected output [Mt].
1694 * Move on to FleXML v1.7 for the embeeded XML parsers. This version
1695 is really less memory-demanding, which should allow you to use
1696 larger files in SimGrid [AL].
1698 * Inform valgrind about our contextes, so that it becomes usable
1699 with the default (and more effecient) version of SimGrid
1700 [contributed by Sékou Diakite, many thanks]
1703 * Introduce a listener thread in charge of receiving incoming
1704 messages from the network. It allows to overlap communication and
1705 computation but most notably, it removes some stupid deadlocks due
1706 to the fact that so far, a process could not send and receive at
1707 the same time. This made most non trivial communication schema
1709 * Convert the PIDs from long int to int to match the MSG ones (and
1710 linux ones too) [Mt]
1711 * New function: gras_agent_spawn() to launch a new process on
1712 current host. Only working in simulation for now. [Mt]
1713 * New function: gras_os_hostport() returning a constant form (ie,
1714 not needing to be freed) of "gras_os_hostname():gras_os_myport()"
1717 * Make the backtrace of exceptions more human readable [Mt]
1718 * New module: xbt/str [Mt]
1719 a ton of string utility functions (split, join, printf to a newly
1720 allocated buffer, trim, etc)
1721 * New module: xbt/hash [Mt]
1722 SHA1 hashing algorithm (more to come if needed)
1723 * New module: xbt/synchro [Mt]
1724 synchronization tools (mutex and conditions) working the same way
1725 in simulation and in real life (mainly useful for GRAS, but not
1727 * New module: xbt/queue [Mt]
1728 classical producer/consumer synchronization scheme
1729 * xbt_dynar_new_sync() creates a synchronized dynar. All access
1730 (using the classical functions will get serialized) [Mt]
1731 * Make dictionary internal table dynamic. No need to specify its size
1732 anymore; functions xbt_dict_new_ext() and xbt_dict_hashsize_set()
1734 * Make sure the log channels are organized as a tree under windows
1735 (because of ANSI C compatibility issue, any channel were child of
1736 root directly) [Mt].
1739 * Cleaned many thing in surf and fixed a few bugs [AL].
1740 * Add a nice command line configuration mechanism to compose models [AL].
1741 * Add a new model for parallel tasks (ptask_L07) that is less buggy than
1742 the previous one (KCCFLN05). It relies on something that looks like
1743 a max-min sharing mechanism but cannot be written as such. A new solver
1744 was thus designed [AL].
1745 * Add a new solver to lmm. Based on Lagrange optimization and
1746 gradient-based descent, it enables to efficiently maximise systems s.a
1748 sum f_i(x_i) s.t Ax<= b with A_{i,j}>=0 and f_i a concave function.
1750 This solver enables to propose two new network models for TCP Reno and
1751 TCP Vegas based on Low's work. These models still need to be fully
1752 tested though [Pedro Velho].
1755 * Bug fix in SD_simulate. Now the time bound given as argument is
1757 * Use the new parallel task model (ptask_L07) as default.
1758 * Use the SURF command line configuration mechanism.
1759 * 0-size tasks (for synchronization) should now work.
1761 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Sun Apr 12 05:20:36 CEST 2009
1763 SimGrid (3.2) stable; urgency=high
1767 We still experience issues on this platform, but we believe that at
1768 least MSG is usable.
1770 GRAS API BREAKAGE (for simplification purpose, sorry):
1771 * the gras_msgtype_by_name is not used anymore. Instead of
1772 gras_msg_send(toserver, gras_msgtype_by_name("request"), &request);
1773 you can write (and must)
1774 gras_msg_send(toserver, "request", &request);
1775 - If you still want to pass a gras_msgtype_t to the function (to cache
1776 the type and avoid the lookup time), use the gras_msg_send_() variant.
1777 - Impacted functions:
1778 gras_cb_register, gras_cb_unregister, gras_msg_send, gras_msg_wait,
1779 gras_msg_rpccall, gras_msg_rpc_async_call, gras_msg_wait_ext
1780 * The callbacks are now expected to return 0 when everything went well
1781 (just like the main() function)
1783 GRAS new features and improvements:
1784 * New module mecanism where user code can use per process globals [Mt]
1785 This is similar to gras_userdata_*() functions, but for libraries. It
1786 factorize some code developped over and over in the examples and AMOK.
1787 It has still to be documented and used (only amok/peermanagement is
1789 * Fix a vicious bug in the TCP buffering mecanism which leaded to message
1790 loss when they were small enough to fit into the buffer and sent quickly
1791 enough so that they can all get received in one shoot.
1792 * gras_datadesc_by_name and gras_msgtype_by_name: now raise an exception
1793 if not found. Use the *_or_null() variant for the old semantic.
1794 * In gras_msg_handle, do not discard messages without callback.
1795 They are probably messages to be explicitly awaited later (ie, proofs of
1796 mis-synchronization in userland since they are sent before being awaited)
1797 No big deal usually.
1798 * gras_socket_meas_send/recv: semantic changed!
1799 The numerical arguments used to be (1) the total amount of data to send
1800 and (2) msg_size. This was changed to (1) msg_size and (2) amount of
1801 messages. This was need for the fool willing to send more than MAXINT
1802 bytes on quite fat pipes.
1805 * Do really rename the hostmanagement module to peermanagement. [Mt]
1806 Ie, rename functions from amok_hm_* to amok_pm_*. This breaks the API,
1807 but this is rather new and this was documented in the module
1808 documentation (poor excuses, I admit)
1809 * Bandwidth measurement semantic changed! This follows the changes to
1810 gras_socket_meas_send/recv explained above.
1813 * A sequential mode has been added to the workstations. When a workstation
1814 is in sequential mode, it can execute only one task, and the other tasks
1815 are waiting in a FIFO. [Christophe Thiery]
1818 * The KCCFLN05 workstation model now handles parallel tasks. It is the
1819 model for SIMDAG. [Christophe Thiery]
1820 * Bug fix in the maxmin solver: Some values were close to 0 instead of
1821 equal to 0, which caused some bad behaviors in
1822 saturated_constraint_set_update. I now use a threshold mechanism like in
1826 * When running manually src/testall, you select specific units [Mt]
1827 testall is the result of our cunit mecanism, and should replace all
1828 the scripty thingy around since bash don't run easily on billware.
1830 * A mallocator system has been added. [Christophe Thiery]
1831 Mallocators allow you to recycle your unused objects instead of freeing them
1832 and allocating new ones.
1834 Documentation update:
1835 * FAQ reworking + New FAQs:
1836 - "Valgrind spits tons of errors!" [Mt]
1837 - "How to repport bugs" [Mt]
1838 - "Cross-compiling a Windows DLL of SimGrid from Linux" [Mt]
1839 - "What is the difference between MSG, SimDag, and GRAS?" [Mt]
1840 - Communication time measurement within MSG [AL]
1841 - I experience weird communication times when I change the latency [AL]
1842 * GRAS tutorial [Mt]
1844 - an introduction to the framework and to the used communication model
1845 - an initiatic tour introducing the most proheminent features:
1847 . Lesson 0: Installing GRAS
1848 . Lesson 1: Setting up your own project
1849 o Part 2: Message passing
1850 . Lesson 2: Exchanging simple messages
1851 . Lesson 3: Passing arguments to the processes (in SG)
1852 . Lesson 4: Attaching callbacks to messages
1853 . Lesson 5: Using globals in processes
1854 . Lesson 6: Logging informations properly
1855 . Lesson 7: Using internal timers
1856 . Lesson 8: Handling errors through exceptions
1857 . Lesson 9: Exchanging simple data
1858 . Lesson 10: Remote Procedure Calling (RPC)
1859 . Lesson 11: Explicitely waiting for messages
1860 . Recapping of message passing features in GRAS
1861 - A HOWTO section containing:
1862 o HOWTO design a GRAS application
1863 More are due, of course. They will come latter. In the meanwhile, you can
1864 check the examples which are still here.
1866 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri Mar 16 21:11:46 CET 2007
1868 SimGrid (3.1) stable; urgency=high
1872 There was a stack corruption somewhere, visible only when optimizing
1873 with these versions. [Vince]
1876 * This is a NEW module! SimDAG (SD for short) is a revival of the old SG
1877 module that enabled to play with Directed Acyclic Graphs. It is built
1878 directly on top of SURF and provides an API rather close to the old
1879 SG. Some old codes using SG are currently under rewrite to check that
1880 all needful functions are provided. [Christophe Thiery]
1883 * Complete rewrite of the KCCFLN05 workstation model. It is now an
1884 extension of the classical CLM03 model that gracefully handles
1885 failures. This is now the default model for MSG and GRAS. It doesn't
1886 handle parallel tasks yet though. [AL]
1887 * Bug fix: Weights were not correctly set in the network part.
1888 WARNING: This may have resulted in incorrect results with simulations
1889 where there are more than one flow on a given link. [AL]
1892 * After a (long ?) discussion on simgrid-devel, we have decided that the
1893 convention we had on units was stupid. That is why it has been decided
1894 to move from (MBits, MFlops, seconds) to (Bits, Flops, seconds).
1895 WARNING : This means that all previous platform files will not work as
1896 such with this version! A warning is issued to ask users to update
1898 A conversion script can be found in the contrib module of the CVS, under
1899 the name contrib/platform_generation/surfxml_update.pl [MQ]
1902 * Bug fix: Processes were started in reverse order, wrt deployment file.
1903 WARNING: if your code relies on this bug, please fix it. [AL]
1904 * Bug fix: Add a test in MSG_task_execute to stop whenever a task is
1905 being executed on two different locations. [AL]
1906 * Bug fix: Failures are now better supported thanks to Derrick's tests
1907 (there was many failure situations I hadn't thought of and that weren't
1908 correctly handled). [AL]
1909 * New function: MSG_host_is_avail indicates you whether a given m_host_t
1913 * New! a real RPC mecanism, as it ought to be since too long. [MQ]
1914 Exception occurring on server-side are propagated back to client (!).
1916 API CHANGE: the callback changed their prototype. Change:
1917 int my_handler(gras_socket_t expeditor, void *payload_data) {
1919 int my_handler(gras_msg_cb_ctx_t ctx , void *payload_data) {
1920 gras_socket_t expeditor=gras_msg_cb_ctx_from(ctx);
1922 * New! function: gras_msg_handleall to deal with all messages arriving
1923 within a given period.
1924 * New! function: gras_socket_server_range to get a server socket in a
1925 range of port numbers (ease to avoid port number conflicts) [MQ]
1926 * New! gras processes display their backtrace when they get a SIGUSR1
1927 or when Ctrl-C is pressed. Use Ctrl-C Ctrl-C to exit.
1928 Sweet to debug RL processes [MQ]
1932 - Do not force experiment sizes to be expressed in kb, or it becomes
1933 impossible to measure the latency this way (needs one byte-long tests)
1934 WARNING: this changes the amok_bw_* function semantic. [MQ]
1935 - Implements the link saturation stuff. [MQ]
1936 * Peer management module:
1937 New! module factorizing code that we wrote over and over [MQ].
1940 * New module: cunit (my jUnit implementation in ansi C) [MQ]
1941 - Test units are placed directly into the library code, they get extracted
1942 automatically and placed into the src/testall binary.
1943 - Convert most of the XBT tests to this system.
1944 * New functions: xbt_dynar_getfirst_as() and xbt_dynar_getlast_as() [MQ]
1945 * XML parsing: rewrote parts of flexml to enable multiple xml parsers to
1946 live in the same C code. This required to change a little bit the API
1947 of surfxml parsing but shouldn't be an issue for end-users. [AL]
1948 * New module: sparse graph structure with basic algorithms (this is work
1949 in progress and the API is not considered to be frozen yet). [AL]
1950 * Display more information on backtraces: source line & function names are
1951 now displayed just like valgrind does (rely on addr2line tool) [MQ]
1952 * New function: xbt_backtrace_display(). Sweet while debuging [MQ]
1953 * Reworked a little bit some #include statements to load only required
1954 headers. Some user code that relied on SimGrid to include stdlib or
1955 stdio may need to include it by themselves. [AL]
1956 * Fixed xbt/log.h. A missing SG_BEGIN_DECL prevented compilation with
1958 * Renamed xbt_host_t into xbt_peer_t since it betterly describes what I
1959 meant. This breaks the API of AMOK and of xbt/config. Sorry about this,
1960 but I guess that almost nobody used those parts. [MQ]
1962 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 14 Jul 2006 01:32:27 +0200
1964 SimGrid (3.0.1) stable; urgency=low
1967 * Unfortunately, I had missed 5 misnamed functions:
1968 xbt_fifo_item_t xbt_fifo_newitem(void);
1969 void xbt_fifo_freeitem(xbt_fifo_item_t);
1970 xbt_fifo_item_t xbt_fifo_getFirstItem(xbt_fifo_t l);
1971 xbt_fifo_item_t xbt_fifo_getNextItem(xbt_fifo_item_t i);
1972 xbt_fifo_item_t xbt_fifo_getPrevItem(xbt_fifo_item_t i);
1973 They're now deprecated. Please use their new versions:
1974 xbt_fifo_item_t xbt_fifo_new_item(void);
1975 void xbt_fifo_free_item(xbt_fifo_item_t);
1976 xbt_fifo_item_t xbt_fifo_get_first_item(xbt_fifo_t l);
1977 xbt_fifo_item_t xbt_fifo_get_next_item(xbt_fifo_item_t i);
1978 xbt_fifo_item_t xbt_fifo_get_prev_item(xbt_fifo_item_t i);
1980 * Bugfix: really disconnect fifo items which are remove_item()ed [AL]
1981 * Documentation: xbt_log module unmercifully reworked [MQ]
1982 * Bugfix: there was a problem with the ending of contexts with
1983 the pthread backend. It caused some weird deadlock or behavior
1984 depending on the pthread implementation. [AL]
1985 * Bugfix: get the exceptions raised in the simulator repport where
1986 and why they come from when they are not catched in time [AL, MQ]
1989 * Bugfix: Do repport the error when two non-connected hosts try to
1990 exchange data (Thanks to Flavien for stumbling into this one) [AL]
1993 * Add additionnal checkings on communications. Assert that two
1994 communicating hosts are connected by a set of links... [AL]
1997 * Add additionnal checkings on channel values in communication [AL]
1998 * New: MSG_task_get_source to see on which host a task was generated [HC]
1999 * New: int MSG_task_probe_from_host(int channel, m_host_t host): returns
2000 the number of tasks waiting to be received on channel and sent
2002 * New: MSG_error_t MSG_task_get_from_host(m_task_t * task, int channel, m_host_t host);
2003 waits for the first task coming from a given host.. [AL]
2005 GRAS new functionnalities: [MQ]
2006 * Enhance the parsing macro to allow the size of multidimentional objects
2007 to be given thru annotations.
2008 * New example (and documentation): Matrix Multiplication a la RPC
2009 (as when I was young!) and fix a bunch of bugs found on the way.
2011 GRAS performance improvements: [MQ]
2013 * Reduce the amount of cbps creation/destruction by making it static to
2014 datadesc_send/recv() and using a (newly created) cbps_reset (based on
2017 * Change libdata to a set so that we can search for stuff by ID (and thus
2018 reduce the insane amount of dict lookups)
2021 * Actually implement gras_datadesc_copy() so that we don't have to mimick
2022 RL communication on top of SG since it's so uneffective.
2023 It may also be used for inter-thread communication in RL, one day.
2024 * Use gras_datadesc_copy() to exchange messages on top of SG
2026 - improve message exchange performance on top of SG
2027 - deprecate transport_plugin_sg.c:gras_trp_sg_chunk_send() & recv()
2028 * Don't exchange on the network the size of the used part of buffer,
2029 instead, specify the possible buffer size to read().
2031 - reduces the amount of read/write calls (one pair per exchange)
2032 - reduces the amount of exchanged data (the size)
2033 - allows to retrieve all arrived data on receiver side, if we don't need
2034 it right now (subsequent read will peek the buffer)
2035 - allows the receiver to proceed with the begining of the stream before
2036 everything is arrived
2037 - make it possible to build an iov transport (using readv/writev)
2039 - take care of the data with non-stable storage (like stacked data),
2041 * If possible, TCP send uses vector I/O (when writev() is here)
2042 - Don't use it for receive since we send data sizes and data on the
2043 same stream, so we wouldn't be able to chain large amount of chunks
2044 before having to flush the stuff to read the size.
2045 * Rework the transport plugin mecanism to simplify it and reduce the
2046 amount of pointer dereferencement when searching for the right function
2049 * I guess that now, we do almost as few system calls as possible while
2050 doing as few data copy as possible.
2052 To improve it further, we could try to send all the sizes first and then
2053 all the data (to use iov on receiving size), but it's only a partial
2054 solution: when you have 2 dimensional data, the sizes of the second
2055 dimension is data of the first dimension, so you need 3 streams.
2057 I'm not sure the potential performance gains justify the coding burden.
2059 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 21 Oct 2005 14:42:20 +0200
2061 SimGrid (3.00) stable; urgency=high
2064 * New! Give the possibility to hijack the surf parser and thus bypass
2065 MSG_create_environment and MSG_launch_application. Have a look at
2066 examples/msg/msg_test_surfxml_bypassed.c to see how it can be done.
2068 -- Arnaud Legrand <simgrid-devel@lists.gforge.inria.fr> Sat, 20 Aug 2005 23:25:25 -0700
2070 SimGrid (2.96) unstable; urgency=low
2075 * New! Exception handling with setjmp or such (code from OSSP ex) [MQ]
2076 This deprecates the xbt_error_t mecanisms.
2077 It modifies (simplifies) all XBT and GRAS API.
2078 MSG API keeps unchanged (exceptions raised by XBT are catched from
2079 within MSG and masked with existing error handling facilities)
2082 * New! Add a FATPIPE model. [AL]
2083 * New! Add a parallel task model. [AL]
2084 * New! Add automatically a loopback interface (in the default
2085 network model) if none was precised.
2088 * Bugfix: MSG_process_resume now works with the current running process.
2090 * New! Add MSG_parallel_task_create and MSG_parallel_task_execute. [AL]
2091 * Modification of MSG_task_get_compute_duration. Once a task has been
2092 processed, the value returned by this function is now equal to 0. [AL]
2093 * New! Add double MSG_task_get_remaining_computation(m_task_t task) and
2094 MSG_error_t MSG_task_cancel(m_task_t task). Add a state
2095 (MSG_TASK_CANCELLED) to MSG_error_t corresponding to the cancelation
2096 of a m_task. For now, MSG_task_cancel only works with computation
2098 * New! Add double MSG_get_host_speed(m_host_t h) that returns the speed
2099 of the processor (in Mflop/s) regardless of the current load on the
2101 * API Change: use proper naming convention for MSG_getClock and
2102 MSG_process_isSuspended: MSG_get_clock and MSG_process_is_suspended.
2104 * New! Add void MSG_task_set_priority(m_task_t task, double priority).
2105 This function changes the priority of a computation task. This priority
2106 doesn't affect the transfer rate. A priority of 2 will make a task
2107 receive two times more cpu power than the other ones. This function
2108 has been added to suit the needs of Nguyen The Loc and hasn't been that
2109 much tested yet. So if it fails, please report it and send me your code.
2111 * API Change: removed all functions and types that were marked "deprecated"
2112 since many months. Renamed MSG_global_init_args to MSG_global_init.
2114 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Mon, 8 Aug 2005 17:58:47 -0700
2116 SimGrid (2.95) unstable; urgency=low
2119 * Steal some nice code to GNU pth to fix context detection and usage [AL]
2120 * Cleanup in the xbt_config API; add configuration callbacks. [MQ]
2121 * Cleanup in the initialization API: the unused "defaultlog" is dead. [MQ]
2124 * Bugfix: Allow absolute paths for platform description files [MQ]
2125 * Bugfix: do free the variables after use. Leads to drastic performance
2127 * Implement max_duration (ie, timeouts) on resources [AL]
2130 * Implement MSG_config to configure MSG at runtime. xbt_cfg test on a real
2132 * Implement MSG_channel_select_from() to help GRAS now that SURF provide
2133 the needed support (timeouts) [AL]
2136 * Implement measurement sockets. You can now get the bandwidth between two
2137 hosts thanks to AMOK (see below). [MQ]
2138 * gras_datadesc_dynar() builds a dynar type descriptor, allowing to send
2139 dynar over the network (yeah) [MQ]
2140 * Real (even if simplistic) implementation of gras_os_myname() on RL [MQ]
2141 * simple/static token-ring example. [Alexandre Colucci and MQ]
2142 * Use MSG_channel_select_from() and remove the *slow* hack we had to put
2143 in place before [MQ]
2146 * Differentiate the types "char[22]" and "unsigned char[22]" in automatic
2147 type parsing. "short" and "long" modifiers were also ignored; other
2148 modifier (such as reference level) are still ignored. [MQ]
2149 * Embeed the buffer size within the buffer itself on SG. [MQ]
2150 That way, send() are atomic and cannot get intermixed anymore (at least
2151 the ones which are less than 100k; bigger messages still have the issue)
2152 * Array size pushed by the field, not by the field type (or each
2153 and every long int will push stuff to the cbps) [MQ]
2154 * use select() to sleep since it allows to portably sleep less than one
2157 GRAS (minor cleanups)
2158 * <project>.Makefile.local (generated from gras_stub_generator) |MQ]:
2161 * Type Callbacks now receive the gras_datadesc_type_t they work on as argument.
2162 * type category 'ignored' killed as it was never used and were difficult
2164 * whether a type can cycle or not is now a flag, leaving room for more
2165 flags (as "ignored", if we feel the need one day ;)
2166 * Rename raw sockets to measurement sockets since "raw" has another
2167 meaning in networking community.
2170 * Advanced Metacomputing Overlay Kit introduction. It is based over GRAS
2171 and offers features not belonging to GRAS but that most applications
2172 need. One day, it may be a set of plugins loadable at runtime.
2173 * New module: bandwidth
2174 bandwidth measurement between arbitrary nodes running this module. [MQ]
2176 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 30 Jun 2005 16:29:20 -0700
2178 SimGrid (2.94) unstable; urgency=low
2180 The first beta release of SimGrid 3 !
2184 * Update the main page and the FAQ. Adding references to gforge.
2187 * Add a gras_os_getpid function.
2190 * Add MSG_task_get_compute_duration() and MSG_task_get_data_size()
2191 * Extend the logs so that they also print PID, hostname, date, ... if
2193 * Convert the MSG example to the use of xbt_logs instead of PRINT_MESSAGE,
2194 and kill the old version which were in testsuite/
2195 * Rewrite tools/MSG_visualization/colorize.pl for using with logs instead
2199 * Add xbt_os_time(). As the rest of xbt/portability, this is not public
2200 for users. Instead, each programming environment (GRAS, MSG,...) use it
2201 when needed to provide such a feature to users.
2202 Don't shortcut the mecanism or you will also shortcut the virtualization
2203 you need on the simulator.
2207 * Cleanups in configury with regard to compile optimization/warning flags.
2208 Also add -fno-loop-optimize to any powerpc since it's the optimization
2209 killing gcc (< 3.4.0).
2210 * Doxygen cleanups: move MSG examples, kill the second Doxygen phase
2211 needed by MSG examples complications
2212 * Borrow configury beautifications from PHP
2215 * Bugfix: XBT_LOG_NEW_DEFAULT_CATEGORY now compiles without compiler
2216 warning (thanks loris for stumbling into this one).
2217 * Bugfix: stop loading private headers (gras_config.h) from the public
2221 * Change SIMGRID_INSTALL_PATH to GRAS_ROOT in Makefiles generated for user.
2222 * Rename gras_get_my_fqdn to gras_os_myname and implement it in the simulator
2223 RL would imply a DNS resolver, which is *hard* to do in a portable way
2224 (and therefore delayed).
2225 * Implement a real timer mecanism and use it in timing macros. This allows
2226 to avoid rounding errors and get a 0.000005 sec precision in timing
2227 macros. While I was at it, various cleanups:
2228 - allow to declare more than one timed section per file (fix a stupid bug)
2229 - move some private declaration to the right place
2230 - merge conditional execution and timing macros into emulation module
2231 - document the module
2232 - make sure the module cleanups its mess on gras_exit
2233 * Documentation improvements:
2234 - (new) how to compile applications using GRAS
2235 - (new) emulation support (timing macros)
2237 -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 13 May 2005 10:49:31 +0200
2239 SimGrid (2.93) unstable; urgency=low
2241 Alpha 4 on the path to SimGrid 3 (aka the "neuf-trois" version)
2244 - Use Paje properly where used. Still to be sanitized properly.
2245 - Portability fix: Add an implementation of the contexts using pthread
2249 - Add xbt_procname(): returns the name of the current process.
2250 Use it to show the current process's name in all logging.
2252 - fix detection of older flex version and the reaction, since we do
2253 depend on modern ones (we use lex_destroy)
2254 - Better separation of SG and RL in the libs: remove all simulation code
2255 from libgras. As a result, this lib is now only 200k when stripped.
2256 Some of the xbt modules may also be duplicated (two sets and such) and
2257 should be cleaned/killed before SG3.
2258 - Insist on using xlC on AIX because of weird problems involving gcc there.
2259 - Cleanup the make remote stuff. This is now done by scripts
2260 tools/graspe-{master,slave} (GRAS Platform Expender). This is still
2261 mainly for our private use, but we're working on changing them to user
2264 - Bugfix: flush the socket on close only if there is some *output*.
2265 - Bugfix: flush idempotent when there's nothing to send (don't send size=0)
2267 - Add MSG_task_get_name. The task names are mainly for debugging purpose,
2270 -- SimGrid team <simgrid2-users@listes.ens-lyon.fr> Fri, 4 Mar 2005 14:32:37 -0800
2272 SimGrid (2.92) unstable; urgency=low
2274 Alpha 3 on the path to SimGrid 3
2278 - New! First try of benchmarking macros.
2279 - New! First try so that gras_stub_generator generate deployment and
2280 remote compilation helpers.
2282 - Bugfix: Initialization fix in msg_test.
2286 - Bugfix: applied patch to lexer so that it doesn't need a huge heap.
2288 - Bugfix: let dicts work with NULL content (_foreach didn't) and cleanups
2290 - API Change: gras_os_sleep to take the amount of seconds as a double.
2291 Accepting an int was error prone since it was the only location where
2292 seconds were coded as such. It leaded to damn rounding errors.
2293 - Bugfix: Hard to belive that timers ever worked before this.
2295 -- SimGrid team <simgrid2-users@listes.ens-lyon.fr> Wed, 23 Feb 2005 22:09:21 +0100
2297 SimGrid (2.91) unstable; urgency=low
2299 Alpha 2 on the path to SimGrid 3
2303 - Bug fix in the lmm_solver.
2305 - New! Interface to Paje (see http://www-id.imag.fr/Logiciels/paje/)
2306 through the function MSG_paje_output.
2307 - New! Introducing two new functions MSG_process_kill() and MSG_process_killall().
2308 - It is possible to bound the rate of a communication in MSG with
2309 MSG_task_put_bounded() (was already in the previous version but I had forgotten
2310 to write it in the changelog).
2311 - Bug fix to let GRAS run on top of MSG until we move it directly on top
2316 - Various cleanups to the autotools stuff
2317 - Begin to move Gras examples to examples/gras/
2318 - Let make distcheck work again (yeah!)
2320 - documentation overhauled using doxygen.
2321 gtk-doc-tools is dead in SimGrid now.
2322 - Automatically extract all existing logging categories, and add the list
2323 to the documentation (long standing one, to say the less)
2325 - Cleanup the known architecture table. Reorder the entries to group what
2326 should be, and use a more consistent naming scheme.
2327 (some of the test dataset are still to be regenerated)
2328 - New! Allow library to register globals on each process just as userdata
2330 This is implemented using a xbt_dict and not a xbt_set, so we loose the
2331 lookup time (for now).
2332 Use it in msg and trp.
2333 This cleans a lot the internals and helps enforcing privacy of the
2334 headers between the gras components.
2335 - New! Add a timer mechanism, not unlike cron(8) and at(1).
2336 - Bugfix: gras_os_time was delirious in RL.
2337 - Bugfix: gras_trp_select/RL don't run into the wall when asked to select
2339 - Reenable GRAS now that it works.
2341 -- Arnaud Legrand <Arnaud.Legrand@imag.fr> Mon, 14 Feb 2005 14:02:13 -0800
2343 SimGrid (2.90) unstable; urgency=low
2345 Alpha 1 on the path to SimGrid 3
2347 * It is a long time since the last release of SimGrid. I'm sorry about
2348 that but as I had told you, I was rewriting a lot of things. I apologize
2349 to those who had been reporting bugs to me and that I had not answered.
2350 If your bug is still in the new version, please tell me. Here is a
2351 summary of the main changes.
2353 * REVOLUTION 1: The SimGrid project has merged with the GRAS project
2354 lead by Martin Quinson. As a consequence SimGrid gains a lot in
2355 portability, speed, and a lot more but you'll figure it out later.
2356 SimGrid now comprises 3 different projects : MSG, GRAS and SMPI.
2357 I wanted to release the new MSG as soon as possible and I have
2358 broken GRAS, which is the reason why, for now, only MSG is fully
2359 functional. A laconic description of these projects is available
2360 in the documentation.
2362 * REVOLUTION 2: I have removed SG and I am now using a new simulation
2363 kernel optimized for our needs (called SURF but only the developers
2364 should use it). Hence, MSG is now roughly 30 times faster and I think
2365 that by rewriting a little bit MSG, I could event speed it up a little
2366 bit more. Beside the gain in speed, it is also much easier to encode a
2367 new platform model with SURF than it was with SG. More to come...
2369 * REVOLUTION 3: I have tried to change a little as possible the API of
2370 MSG but a few things really had to disappear. The main differences
2371 with the previous version are :
2372 1) no more m_links_t and the corresponding functions. Platforms are
2373 directly read from a XML description and cannot be hard-coded
2374 anymore. The same format is used for application deployment
2375 description. The new format is described in the documentation.
2376 Have a look in tools/platform_generation. There is a tiny script
2377 that converts from the old platform format to the new one. Concerning
2378 the application deployment format, parsing the old one is tricky.
2379 I think most of you should however be able to convert your files. If
2380 it is really an issue, I can write a C code that does the conversion.
2382 2) the toolbox tbx does not exist anymore. We now have a library
2383 with much more data-structures but without the hash-tables (we have
2384 dictionaries that are much faster).
2386 -- Arnaud Legrand <Arnaud.Legrand@imag.fr> Mon, 31 Jan 2005 10:45:53 -0800
2388 *****************************************************************************
2389 * Follows the old GRAS changelog. It does not follow the same syntax, but I *
2390 * don't feel like converting the oldies. (Mt) *
2391 *****************************************************************************
2394 Version 2.90: "the long awaited one"
2395 - Finished rewriting and debugging MSG. Rewrote the documentation.
2396 - disable GRAS for now since it needs to be ported to the newest SG
2399 - Finish the port to windows (using mingw32 for cross-compile)
2402 - Main loop and datastructures of SURF. A cpu resource object is
2403 functional. Surf can thus be used to create cpu's with variable
2404 performance on which you can execute some actions.
2406 2004-11-15 Martin Quinson
2407 - Port to ARM. Simply added the alignment and size descriptions. Should
2408 work, but the ARM machines are so slow that I didn't had the opportunity
2409 to 'make check' over there yet.
2411 2004-11-15 Arnaud Legrand
2412 - Trace manager now written. It uses a heap structure and is therefore
2413 expected to be efficient. It may however be speeded up (particularly
2414 when many events occur at the same date) by using red and black
2415 trees. One day maybe...
2416 - Max-min linear system solver written. It uses a sparse matrix
2417 structure taking advantage of its expected use. Most operations are
2418 O(1) and free/calloc are called as few as possible. The computation of
2419 the minimum could however be improved by using a red and black tree
2422 2004-11-03 Arnaud Legrand
2423 - Rename every gras_* function that was in xbt/ to its xbt_
2425 - Add a heap and a doubly-linked list to xbt
2426 - Added a dichotomy to the dictionaries. make check works as well before
2427 so I assume that the patch is correct. I do not know however if things
2428 run effectively faster than before now. :)
2430 Inclusion of the SimGrid tree in the GRAS one. The archive is renamed to
2431 SimGrid, and the version number is bumped to 2.x
2433 2004-10-29 Martin Quinson
2434 - Introduction of the remote errors.
2435 They are the result of a RMI/RPC on the remote machine.
2436 ErrCodes being scalar values, you can't get the host on which those
2437 errors did happen. Extending the error mechanism as in Gnome is possible.
2438 No idea yet whether it is a good idea.
2440 2004-10-28 Martin Quinson
2441 - Interface revolution: the Starred Structure Eradication.
2442 I used to do typedef struct {} toto_t; and then handle *toto_t.
2443 Arnaud (and Oli) didn't like it, and I surrendered. Now, you have:
2444 - ???_t is a valid type (builded with typedef)
2445 - s_toto_t is a structure (access to fields with .)
2446 - s_toto is a structure needing 'struct' keyword to be used
2447 - e_toto_t is an enum
2448 - toto_t is an 'object' (struct*)
2450 typedef struct s_toto {} s_toto_t, *toto_t;
2451 typedef enum {} e_toto_t;
2452 Moreover, only toto_t (and e_toto_t) are public. The rest (mainly
2453 s_toto_t) is private.
2455 - While I was at it, all gras_<obj>_free() functions want a gras_<obj>_t*
2456 so that it can set the variable to NULL. It was so for dicts and sets,
2457 it changed for dynars.
2459 - Fix a bunch of memleaks in dict_remove
2460 - Fix a bug in sg/server_socket opening: it failed all the time.
2462 2004-10-07 Martin Quinson
2463 - Speed up dynar lookup operation a bit.
2465 gras_dynar_get is dead.
2467 Now, you can choose between gras_dynar_get_cpy (the old gras_dynar_get
2468 but should be avoided for efficiency reasons) and gras_dynar_get_ptr
2469 (which gives you the address of the stored data).
2471 gras_dynar_get_as is an helpful macro which allows you to retrieve a
2472 copy of the data using an affectation to do the job and not a memcpy.
2474 int toto = gras_dynar_get_as(dyn,0,int); rewrites itself to
2475 int toto = *(int*)gras_dynar_get_ptr(dyn,0);
2477 It does not really speedup the dynar test because they are
2478 setting elements all the time (and look them seldom). But the dict does
2479 far more lookup than setting.
2481 So, this brings the dict_crash test from ~33s to ~25s (200000 elms).
2483 2004-10-05 Martin Quinson
2484 - Allow to (en/dis)able the cycle detection at run time.
2486 Whether we should check for cycle or not is now a property of each
2487 datatype. When you think there may be some cycle, use datadesc_cycle_set.
2488 datadesc_cycle_unset allow to remove this property when previously set.
2490 Note that the cycle detection is off by default since it impacts the
2491 performance. Watch the data you feed GRAS with ;)
2493 This property is hereditary. Any element embedded in a structure having it
2494 set have it set for the time of this data exchange.
2496 You should set it both on sender and receiver side. If you don't set it on
2497 sender side, it will enter an endless loop. If you forget on receiver
2498 side, the cycles won't be recreated after communication.
2500 - Header reorganization.
2501 Kill gras_private.h, each submodule must load the headers it needs.
2503 2004-10-04 Martin Quinson
2504 - Interface revolution: do not try to survive to malloc failure.
2506 Now, gras_malloc and friends call gras_abort() on failure.
2507 As a conclusion, malloc_error is not a valid error anymore, and all
2508 functions for which it was the only gras_error_t return value are
2509 changed. They now return void, or there result directly.
2510 This simplify the API a lot.
2512 2004-09-29 Martin Quinson
2513 - Re-enable raw sockets.
2514 Created by gras_socket_{client,server}_ext;
2515 Used with gras_raw_{send,recv}
2518 It should allow to kill the last bits of gras first version soon.
2520 This is not completely satisfactory yet (duplicate code with
2521 chunk_{send,recv}; a bit out of the plugin mechanism), but it should
2524 - Simplify transport plugin (internal) interface by not passing any
2525 argument to _server and _client, but embedding them in the socket
2528 2004-09-28 Martin Quinson
2529 - Finish the port to AIX.
2530 autoconf was my problem (segfault within the malloc replacement
2531 function. No idea why)
2533 2004-09-16 Martin Quinson
2534 - Fix some size_t madness on 64bit architectures.
2536 2004-09-08 Martin Quinson
2537 - Reduce the number of system headers loaded, overload some more system
2538 calls (such as malloc to cast the result of the system one, and work
2540 - Fix and reintroduce the config support
2542 2004-09-07 Martin Quinson
2543 - Source code reorganization to allow Arnaud to surf all over there.
2544 - Allow to document the logging categories.
2545 - Remove all uppercase from logging categories and useless cleanup in names.
2547 2004-08-18 Martin Quinson
2548 Version 0.6.2 (protocol not changed; API changed)
2549 - Interface cleanup: gras_msgtype_by_name returns the type (instead of a
2550 gras_error_t), and NULL when not found. Functions expecting a msgtype
2551 as argument (msg_wait; msg_send) deal with NULL argument by providing a
2552 hopefully usefull message.
2553 - Portability to prehistoric sparcs again
2555 2004-08-17 Martin Quinson
2556 Version 0.6.1 (protocol not changed; ABI not changed)
2557 - prealloc some buffers to speed things up
2559 2004-08-11 Martin Quinson
2560 Version 0.6 (protocol not changed; ABI expended)
2561 - The parsing macro can deal with the references, provided that you add
2562 the relevant annotations (using GRAS_ANNOTE(size,field_name))
2564 2004-08-09 Martin Quinson
2565 Version 0.5 (protocol not changed; ABI changed)
2566 - Allow to off turn the cycle detection code in data exchange at
2567 compilation time. It should be at run time, but I'm short of time (and
2568 the config stuff is still broken). That way, we keep dict out of the
2569 critical path, which is good because the performance is poor:
2570 - search not dichotomial yet
2571 - dynar give no way to access their content and memcpy everytime
2572 - In composed data description (struct, ref and so on), stop foolness of
2573 keeping the subtype's ID, but store the type itself. This keeps sets out
2574 of the critical path, which is good since they rely on dynar and
2575 dictionnaries. The only loose of that is that we cannot detect the
2576 redeclaration of a structure/union with another content (but I'm not sure
2577 the code detected well this error before anyway). We still can detect
2578 the redefinition discrepancy for the other types.
2579 - Use a whole bunch of optimisation flags (plus -fno-strict-aliasing since
2580 it breaks the code because of type-punning used all over the place).
2581 This breaks on all non-gcc architectures (for now).
2583 All those changes (plus the buffer of last time) allow me to gain 2 order
2584 of magnitude on cruel tests consisting of 800000 array of integers on two
2585 level of a hierarchical structure (200 secondes -> 4 secondes)
2588 - the selector of reference must now return the type it points to, not
2589 the ID of this type.
2591 2004-08-06 Martin Quinson
2592 Version 0.4 (protocol changed; ABI not changed)
2593 - Allow to pass --gras-log argument to processes in simulation mode. Really.
2594 - New debugging level: trace (under debug) to see effect of GRAS_IN/OUT
2595 - Implement a buffer transport, and use it by default (it relies on tcp in
2596 real life and on sg in simulation).
2597 That's a bit hackish since I had a new field to the structure to store
2598 its data without interfering with the subtype ones. Inheritance
2599 is tricky in C. And that's a kind of reverse inheritance with one class
2600 derivating two classes. Or maybe a game with java interfaces. Anyway,
2601 that's damn hard in C (at least).
2602 Moreover, I got tired while trying to ensure plugin separation and
2603 genericity in SG mode. MSG wants me to do weird things, so let's go for
2604 cruel hacks (temporarily of course ;).
2605 See comment in transport_private.h:71
2606 - do not include all the _interface headers in private but in the files
2607 which really need them (to cut the compilation time when they are
2610 2004-07-26 Martin Quinson
2611 Version 0.3 (protocol not changed; ABI changed)
2612 - Major overhault of the datadesc interface to simplify it:
2613 - shorted the function names:
2614 s/gras_datadesc_declare_struct/gras_datadesc_struct/ and so on
2615 - add a trivial way to push/pop integers into the cbps without malloc.
2616 This allows to make really generic sub_type description, which simply
2617 pop their size of the stack.
2618 - add a function gras_datadesc_ref_pop_arr() which does what users want
2619 most of the time: Declare a dynamic array (which pops its size of the
2620 stack) and declare a reference to it. Poor name, but anyway.
2621 - kill the post-send callback, add a post-receive one
2623 2004-07-23 Martin Quinson
2624 Version 0.2 (protocol changed; ABI changed)
2625 - add some testing for cpbs in the test cases, and fix some more bugs.
2626 This invalidate again the little64 data file, since I cannot regenerate
2628 - remove an awfull optimization in the logging stuff, allowing me to:
2629 - understand it again
2630 - learn gcc how to check that the argument match the provided format
2631 - fix all errors revealed by gcc after that
2632 - internal keys of dict are not \0 terminated. Deal with it properly in
2633 loggings instead of segfaulting when the user want to see the logs :-/
2635 2004-07-22 Martin Quinson
2636 - Fix some stupid bug preventing cbps (callback postit) from working
2638 2004-07-21 Martin Quinson
2639 - Some documentation cleanups
2640 - remove the useless last argument of msgtype_declare
2641 - rename the Virtu functions to fit into the 'os' namespace
2642 - move headers src/include -> src/include/gras/ and stop fooling with
2643 gras -> . symbolic link
2644 - make distcheck is now successful
2646 2004-07-19 Martin Quinson
2648 - Build shared library also
2649 - Install html doc to the right location
2650 - stop removing maintainer files in make clean
2651 - build tests only on make check
2653 2004-07-13 Martin Quinson
2655 - No major issue in previous version => change versionning schema
2656 - Re-enable little64 convertion test now that Abdou kindly regenerated the
2657 corresponding dataset.
2659 2004-07-11 Martin Quinson
2661 - Get it working with any kind of structure (we can compute the padding
2662 bytes remotely for all the architectures I have access to)
2663 - Implement the structure parsing macro (still not quite robust/complete)
2664 - Improvement to the remote testing toysuite
2666 2004-07-10 Martin Quinson
2667 [autoconf mechanism]
2668 - get ride of a bunch of deprecated macros
2669 - actually run the test for two-compliment, not only compile it :-/
2670 - test whether the structures get packed (and bail out if yes. Damn.
2671 Alignment is a serious matter)
2672 - test whether the structures get compacted (but respecting the alignment
2673 constraints of each types)
2674 - test whether the array fields of structures can straddle alignment boundaries
2676 - Damnit, double are bigger than float (typo in creation of 'double' datadesc)
2677 (took me 2 hours to find that bug, looking at the wrong place)
2678 - Add gras_datadesc_declare_{union,struct}_close(). They must be used
2679 before sending/receiving and are used to compute the offsets of fields
2680 - Given that padding size depend even on compiler options, keep track of
2681 alignment and aligned_size only for the current architecture. Not a big
2682 deal since we send structure fields one after the other (seems
2684 - Add the datastructure used for IEEE paper by the PBIO guys to the test
2685 program, let it work on linux/gcc/little32. portability todo.
2687 2004-07-08 Martin Quinson
2688 - import and improve remote compilation support from FAST
2689 - make sure make check works on half a dozen of machines out there
2691 2004-07-07 Martin Quinson
2692 Let's say it's version 0.0.3 ;)
2693 - Implement conversions (yuhu!)
2694 - Let it work on solaris (beside conversion, of course)
2695 - Stupid me, using rand() to generate the conversion datatests in not wise.
2697 2004-07-06 Martin Quinson
2698 - Let make dist work, since I'm gonna need it to compile on remote hosts
2699 - Let Tests/datadesc_usage write the architecture on which the file was
2700 generated as first byte.
2701 - Add PowerPC (being also IRIX64), SPARC (also power4) and ALPHA
2702 architecture descriptions.
2703 - Add datadesc_usage.{i386,ppc,sparc} files being the result of execution
2704 on those architectures.
2705 - Optimization: send/recv array of scalar in one shoot
2707 2004-07-05 Martin Quinson
2708 - YEAH! GRAS/SG and GRAS/RL are both able to run the ping example !
2710 - Plug a whole bunch of memleaks
2711 - each process now have to call gras_{init,exit}. One day, their log
2712 settings will be separated
2713 - Continue the code factorisation between SG, RL and common in Transport.
2715 2004-07-04 Martin Quinson
2717 - Redistribution between SG and RL.
2718 We wanna have to accept in SG, so move accepted related parts of RL in
2719 the common part. (more precisely, the dynar of all known sockets is no
2720 more a static in transport.c, but part of the process_data)
2722 [gras_stub_generator]
2723 - Bug fix: Do call gras_process_init from gras_init (wasnt called in RL).
2725 2004-07-03 Martin Quinson
2726 - Create a new log channel tbx containing dict, set, log, dynar (to shut
2727 them all up in one shot)
2729 - Fix the ugly case of reference to dynamic array.
2730 - New (semi-public) function gras_datadesc_size to allow the messaging
2731 layer to malloc the needed space for the buffer.
2733 - gras_socket_close now expect the socket to close (and not its address to
2734 put NULL in it after it). This is because the socket passed to handlers
2735 is one of their argument (=> not writable).
2737 - propagate the interface cleanup from last week in datadesc, ie remove a
2738 superfluous level of indirection. User pass adress of variable
2739 containing data (both when sending and receiving), and not of a variable
2740 being a pointer to the data. Let's say that I like it better ;)
2741 The price for that is constructs like "int msg=*(int*)payload" in
2742 handlers, but it's a fine price, IMHO.
2744 - Let it work in RL (yuhu)
2746 2004-06-21 Martin Quinson
2748 - porting SG plugin and SG select to new standards (works almost).
2749 - plug memleaks and fix bugs around.
2752 - cleanup the prototype of data recv and force users to specify when they
2753 want to handle references to objects. Test case working even for cycles.
2754 - plug memleaks. Valgrind is perfectly ok with this.
2756 2004-06-12 Martin Quinson
2758 - cleanup the separation between plugin and main code in plugin creation
2760 2004-06-11 Martin Quinson
2762 - Reput hook for raw sockets, needed for BW experiments
2763 - kill a few lines of dead code
2764 [Data description] Interface cleanup
2765 - gras_datadesc_by_name returns the searched type or NULL.
2766 That way, no variable is needed to use a type desc once, which makes
2768 - gras_datadesc_declare_[struct|union]_append_name is removed. The last
2769 two parameters were strings (field name, type name), leading to
2771 [Dicos] Interface cleanup
2772 - gras_dico_retrieve -> gras_dico_get ; gras_dico_insert -> gras_dico_set
2773 This is consistant with the dynar API.
2775 2004-04-21 Martin Quinson
2777 - Porting to new standards.
2779 - interface cleanup.
2780 There is no bag anymore, no need to take extra provision to mask the
2781 pointers behind "ID".
2782 Better splitup of functions between files create/exchange/convert.
2783 This is still a bit artificial since convert and receive are so
2784 interleaved, but anyway.
2786 - add a queued message list to procdata (the ones not matching criteria
2788 - factorize some more code between SG and RL wrt procdata
2790 - use gras_exit in example to track memleaks
2791 - get rid of gs_example now that GS is properly integrated into gras
2792 - update run_test to integrate the latest tests (datadesc)
2794 - rename WARNINGn macros to WARNn since it prooved error-prone
2796 2004-04-19 Martin Quinson
2798 - register init/exit functions within gras module mechanism
2799 - send/receive function.
2800 Convertion is not implemented, but short-cutted if not needed.
2801 struct/array elements are sent one by one (instead of block-wise), but
2802 nobody really cares (yet). Get a prototype before optimizing.
2803 - tests (using a file socket) for DD send/receive on:
2804 - base types: int, float
2805 - array: fixed size, string (ie ref to dynamic string)
2806 - structure: homogeneous, heterogeneous
2807 - chained list, graph with cycle
2808 Believe it or not, valgrind is not too unhappy with the results. The
2809 cycle happily segfaults, but the others are ok. And I'm sick of pointers
2813 - Bugfix when using a filename explicitely (instead of '-')
2815 2004-04-09 Martin Quinson
2817 - factorize more code between RL and SG in socket creation
2818 - Complete the implementation and tests of:
2820 o file (only in RL, and mainly for debugging)
2822 I lost 3 days to design a portable address resolver, and then decided
2823 that the prototype mainly have to run on my box.
2824 Addressing portability too early may be like optimizing too early :-/
2826 - use gras_init in the Tests instead of the crappy parse_log_opt
2827 (the latter function is removed)
2828 [Conditional execution]
2829 - New functions: gras_if_RL/gras_if_SG (basic support for this)
2830 [Code reorganisation]
2831 - Get rid of libgrasutils.a since it makes more trouble than it solves.
2832 Build examples against the RL library, since there is no way to disable
2833 its creation for now.
2835 For information, the beginning of coding on GRAS was back in june
2836 2003. I guess that every line has been rewritten at least twice since