-SimGrid (3.3-cvs) unstable; urgency=low
+SimGrid (3.3.4) unstable; urgency=low
+
+ The "Desktop Grid needs love too" release.
+
+ Models improvements:
+ * Major speedup in the maxmin system solving by using lazy evaluation
+ Instead of solving completely the maxmin system at each iteration,
+ only invalidate (and recompute) the modified parts.
+ This new feature is enabled in default models but you can try to
+ turn it on with "--cfg:maxmin-selective-update=1" for other models.
+ * Cas01 IMproved as default CPU model
+ This CPU model is the same Cas01 model, but it uses the
+ maxmin-selective-update flag and a heap structure to manage
+ actions on SURF kernel.
+ It reduces the complexity to find the next action to finish and,
+ consequently, it's faster than the old Cas01.
+ This is the new default CPU model (Cas01).
+ * Rename the old Cas01 model to Cas01_fullupdate
+ Keep the old cpu model Cas01 with the new name of Cas01_fullupdate.
+ Use "--cfg=cpu_model:Cas01_fullupdate" to use the old default CPU model.
+ * CpuTI (CPU Trace Integration)
+ A new CPU model whose objective is simulate faster when using
+ availability trace files.
+ Instead of using a full featured, over engineered maxmin system for
+ CPU modeling, this model does the pre-integration of traces files
+ to calculate the amount of CPU power available, and so, executes
+ faster than the old CPU models.
+ Use "--cfg=cpu_model:CpuTI" to change to this CPU model.
+ * Use LV08 as default network model since it gives better accuracy
+ for small messages and shouldn't change things for big ones.
+ Use --cfg=network_model:CM02 to get the previous behavior.
+
+
+ ******************************************
+ *DO NOT MIX 3.3.4 RESULTS WITH OLDER ONES*
+ ******************************************
+ * The new CPU model may changes simulations!
+ The point is that events occurring at the exact same timestamp
+ are not scheduled in the same order with the old and new
+ version. This may be enough to completely change the execution
+ of simulations in some cases.
+ * The new network model will change simulations!
+ This new model is more realistic than the previous one, so you
+ should consider redoing your old experiments with this model.
+ Sorry for the inconvenience.
+
+ MSG:
+ * Port of MSG's mailbox on top of SIMIX network
+ The put/get mechanism was greatly simplified thanks to the new SIMIX module.
+
+ SIMIX:
+ * New SIMIX network module
+ It provides a rendez-vous point (aka mailbox) based send/recv API to perform
+ synchronous communication.
+
+ SimDag:
+ * new function SD_daxload(char*) to load a DAX file
+ (see http://vtcpc.isi.edu/pegasus/index.php/WorkflowGenerator)
+ * Introduce typed tasks. Specify its kind and cost at creation.
+ At scheduling, just give where it should be placed, and the cost
+ for each involved resource is automatically computed.
+ Existing constructors so far (more to come of course):
+ - SD_task_create_comm_e2e() for end-to-end communication
+ - SD_task_create_comp_seq() for sequential computation
+ Use SD_task_schedulev() / SD_task_schedulel() to schedule them.
+ * new function SD_task_dump() for debuging display
+ * new function SD_task_dotty(task,FILE*) writing to file the info
+ about the task in dotty format
+ * SD_task_dependency_exists() can now cope with having one of its
+ arguments NULL. If so, it tests whether the other argument has any
+ dependency.
+ * Add getters on list of preceding/following tasks:
+ SD_task_get_parents(task) and SD_task_get_children(task)
+ * Add getters on amount of workstations and list:
+ SD_task_get_workstation_count(t) and SD_task_get_workstation_list(t)
+ * Add getter on task kind: SD_task_get_kind(task)
+ * Update the start_time and finish_time of tasks on completion/failure
+ * Bugfix: Remove task from state swags when destroyed
+
+
+ Bug fixes:
+ * GTNetS wrappers should now be usable again (and betterly tested too)
+ * Fix a major regression from 3.2 where the timeout provided to
+ MSG_task_put_with_timeout() was used as absolute time before which
+ the comm should be done.
+ * Fix a source-level compatibility glitch from 3.2: after defining
+ MSG_USE_DEPRECATED, you can use the old name
+ MSG_task_put_with_time_out() for MSG_task_put_with_timeout()
+ * Allow to compile from the SVN with automake 1.11
+ * Fix some problems when using the "start_time" tag in deployment XMLs.
+
+ -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
+
+SimGrid (3.3.3) stable; urgency=low
+
+ The "Need for Speed" release.
+
+ The timings done to validate the 3.3.2 were faulty.
+ Instead of being 5% faster, it was 15% slower (compared to 3.3.1).
+
+ The problem was a conversion from a manually handled vector to
+ xbt_dynar_t on the critical path.
+ xbt_dynar_foreach calls functions, inducing stack management crap.
+
+ We inlined these functions and xbt_dynar_foreach is now breath taking.
+ We also inlined xbt_swag_belong on the way.
+
+ Here are some approximate speedup measurements (on master/slaves
+ simulations lasting between 10s and 20s each):
+ 3.3.1 -> 3.3.2: about same performance
+ 3.3.2 -> 3.3.3: 40% speedup
+ 3.3.1 -> 3.3.3: 40% speedup
+ 3.3.1 with inline patch -> 3.3.3: 30% speedup
+
+ Our reading is that the refactoring which occurred in 3.3.2 made us
+ suffer much more from the xbt_dynar_foreach low performance, but
+ once we solved this, this refactoring proved to be very performance
+ effective. From the 40% speedup, somehow, 10% are due to the
+ inlining and 30% to the refactoring.
+
+ That's a pitty that gcc cannot inline functions placed in other files
+ alone. We have to choose between:
+ - break the encapsulation (by putting private data structures and
+ accessors in headers files to help gcc)
+ - live with low performance
+ - switch to a decent compiler such as icc (not quite possible).
+
+ -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Thu, 20 Aug 2009 21:21:33 +0200
+
+SimGrid (3.3.2) stable; urgency=low
+
+ The "Simplicity does not preceed complexity, but follows it" release.
+
+ The main contributors of this release were (lexical order):
+ Silas De Munck, Stéphane Genaud, Martin Quinson, Cristian Rosa.
+
+ SURF:
+ * Extract the routing logic into its own object.
+ (was dupplicated in network.c and workstation_LV07.c;
+ Allows to implement other ways of storing that info)
+ => kill now useless network_card concept
+ - Use dynar to represent routes (instead of void** + int*)
+ - kill link_set (use surf_network_model->resource_set instead)
+ - Add a command-line option to choose the routing schema to use
+ - Add three new models:
+ * Floyd (shortest path computed at initialization)
+ * Dijikstra (shortest path recomputed all the time)
+ * Cached Dijikstra (shortest path computed on need)
+ All these models where contributed by Silas De Munck, and are
+ described in his ICCS09 paper.
+
+ * Simplify model declaration
+ (less redirections, less function to write when defining a model)
+ - Factorize stuff between models:
+ - model_init/exit
+ - Set of resources:
+ surf_model_resource_set(model)
+ surf_model_resource_by_name(model, name)
+ - Unify the types of models in s_surf_model_t (using an union)
+ - Embeed fields of common_public directly into s_surf_model_t
+ - Rename model methods:
+ action_free ~> action_unref
+ action_change_state ~> action_state_set
+ action_get_state ~> action_state_get
+ - Change model methods into functions :
+ (model)->common_public->action_use ~> surf_action_ref
+
+ * Implement a generic resource; use it as ancestor to specific ones
+ (allows to kill duplicated code in models)
+ Drawback: timer command don't need no name nor properties;
+ workstation_CLM03 don't need no properties
+ (but I guess we can live with those few bytes wasted)
+
+ * Improve the action object model
+ - implement a constructor avoiding dupplicated code about field
+ initialization in generic_action part.
+
+ * Kill the SDP model: it has an external dependency, is deprecated
+ in flavor of modern lmm models, and didn't compile since a while
+
+ SIMIX:
+ * Relocation of the context module from XBT to SIMIX.
+ (the context were decoupled from the simix processes, duplicating a lot of code)
+ => a lot of code was factorized
+ - less overhead is introduced during scheduling
+ - simpler API for the context factory
+ - the logic for process creation,destruction and manipulation was simplified
+ * Simplification of the s_smx_process_t data structure.
+ => accesing the simix level data associated to a process is faster now,
+ and the code is a lot more readable.
+
+ SMPI:
+ * Implement some more MPI primitives:
+ MPI_Bcast, MPI_Waitany, MPI_Waitall, MPI_Reduce, MPI_Allreduce, MPI_Scatter, MPI_Sendrecv, MPI_Alltoall
+ -implementation: Bcast: flat or 2-ary tree (default),
+ Barrier: 4-ary tree,
+ Reduce: flat tree
+ Allreduce: Reduce then Bcast
+ Alltoall: "basic_linear" if data per proc < 3Kb, "otherwise pairwise".
+ Not yet implemented: "Bruck" for data per proc < 200b and comm size > 12
+ Alltoallv: flat tree, like ompi
+ Scatter: flat tree
+ * Add support for optimized collectives (Bcast is now binomial by default)
+ * Port smpirun and smpicc to OS X
+
+ SimDag:
+ * Kill SD_link_get_properties: hard to maintain and makes very little sense
+ Shout out if you used it.
+
+ GRAS:
+ * Display the list of still queued messages in SG mode when existing
+ the process.
+
+ XBT:
+ * Add xbt_set_get_by_name_or_null() [Silas De Munck]
+ * Add xbt_graph_node_get_outedges() [Silas De Munck]
+ * Add xbt_str_from_file(FILE*)
+ * Add xbt_dict_get_key achieving a linear reverse search
+ * Remove the context module
+
+ Portability report of this version:
+ * Main portability targets:
+ - Linux(debian)/x86/context
+ - Linux(debian)/x86/pthreads
+ - Linux(debian)/amd64/context
+ - Linux(debian)/amd64/pthreads
+ On these, we still have the eratic breakages of gras/pmm and
+ amok/saturate_sg reported in previous version. We still think
+ that the tests are the cause of the fault, not the tested code.
+
+ - Mac OSX Leopard/x86/context
+ Still false negative in tesh autotesting.
+ Smpi still fails, but this time because readlink does not accept -f
+ Everything seems to work properly beside of that.
+
+ * Exotic platforms:
+ - AIX version 5.3 (only tested contexts this time)
+ Smpi still fails there because mktemp is not installed.
+ Everything seems to work properly beside of that.
+ - OpenSolaris 11
+ I managed to compile it for the first time, but several breakages.
+ Won't delay the release for this exotic platform.
+
+ * Windows: it's still lagging behind. If you want to help, please
+ stand up.
+
+ Timing report of this version:
+ This version seem to be more than 5% faster than 3.3.1 (on linux
+ 64bits with contextes). The gain is less than expected, we are
+ investigating this for next release.
+
+ -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Wed, 19 Aug 2009 17:07:12 +0200
+
+SimGrid (3.3.1) stable; urgency=low
+
+ OVERALL CHANGES:
+ * Implement a --cfg-help to show existing configuration variables
+ * Build chain do not require doxygen in maintainer mode
+
+ GRAS:
+ * fix a bug on struct sizeof computation, which prevented the
+ exchange of arrays of structs in some conditions
+ - added a regression test about this in datadesc_usage
+ * Allow the exchange of 0-long dynamic vectors.
+ - for that, use -1 as indicator of dynamic size instead of 0
+ - This implied to change any size from unsigned long to long,
+ reducing a bit communication abilities, but I guess that with
+ 64bits being quite common, this is more than enough.
+ - This also induce a protocol change, thus bumping network protocol
+ version from 0 to 1 (if we have external users, we have to get
+ clean on that point too ;)
+ - added two regression tests about this in datadesc_usage
+ * Be more verbose when propagating local exceptions
+ This helps debugging.
+ * Display the status of simulated processes when receiving SIGINT in
+ simulation mode
+
+ MSG:
+ * Allow to control the simulation from a trace file.
+ New functions MSG_action_register() and MSG_action_trace_run()
+ The first one allows to associate a function execution to each
+ kind of action while the second one parses a trace file and
+ triggers the corresponding actions within the system.
+ For now, only a toy example is provided in examples/msg/actions
+ * Add an exemple of process migration in examples/msg/migration
+ * Fix a bug in task exchange which broke MSG_task_get_sender()
+ Add a teshsuite regression test for that.
+ [Bug: if MSG_task_get_sender() is called after sender exit,
+ bad things happen]
+ * Fix a bug which prevented suspend/resume to work properly
+ * Display the status of simulated processes when receiving SIGINT
+ This fixes a regression of v3.3. due to the introduction of SIMIX
+ * Bug fixing in failure management:
+ - trace could not start by a failure at time 0
+ - failure during communications were not working
+
+ SIMIX:
+ * Add SIMIX_process_set_name() to change the name of the current
+ process in the log messages.
+ * Store smx_hosts in a dict since we only retrieve them by name
+ * Move the configuration infrastructure to surf
+
+ SIMDAG:
+ * Move the configuration infrastructure to surf
+
+ SMPI:
+ * Massive internal cleanups:
+ - Store internal structures on processes instead of hosts (allows
+ to have more than one process per host, in addition of being more
+ logical)
+ - Cleanup the initialization/finalization process
+ - Kill a whole bunch of unneeded synchronization:
+ processes run in exclusive manner within the simulator
+ - Move queues from global tables to process data fields
+ * Improve smpirun:
+ - now accept -platform and -hostfile arguments
+ - Pass the right rank value to processes according to the hostfile
+ * Compile the examples by default, and use them as regression tests
+ * Implement MPI_Wtime()
+ * Change the reference speed to a command line option
+
+ SURF:
+ * TCP_gamma can now be specified as command line option using
+ --cfg=TCP_gamma:10000000.0
+ * Change the --surf-path cmd line option into --cfg=path:
+
+ XBT:
+ * Also include strbuff from xbt.h public header
+ * xbt_ex_display(): do not free the exception after displaying
+ This allows to do more with the given exception afterward.
+ Users should call xbt_ex_free() themselves.
+
+
+
+ Portability report of this version:
+ * Main portability targets:
+ - Linux(debian)/x86/context
+ - Linux(debian)/x86/pthreads
+ - Linux(debian)/amd64/context
+ - Linux(debian)/amd64/pthreads
+ These targets fail about 1/10 of times on gras/pmm, but we believe
+ that this is because of the test, not because of simgrid.
+ amok/saturate_sg fails even more rarely, and the test may not be
+ the problem.
+
+ - Mac OSX Leopard/x86/context
+ The test suite still spits tons of errors because some obscure
+ force prevents us from removing the temporary directories
+ arguing that they still contain some metadata I've never heard of.
+ Smpi fails because seq is not installed.
+ Everything seems to work properly beside of that.
+
+ * Exotic platforms:
+ - AIX version 5.3 (both contexts and pthread)
+ Smpi still fails there because mktemp is not installed.
+ XML inclusions seems rosty on AIX.
+
+ * Windows: it's still lagging behind. If you want to help, please
+ stand up.
+
+ -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Sat, 27 Jun 2009 00:14:30 +0200
+
+SimGrid (3.3) stable; urgency=high
OVERALL CHANGES:
not scheduled in the same order with the old and new version. This
may be enough to completely change the execution of simulations in
some cases. Sorry for the inconvenience.
-
+
+ * Cleanup and upgrade the XML format to push further scalability
+ issues (check http://hal.inria.fr/inria-00256883/ for more info)
+
* Improve the testing infrastructure with tesh. Now a very large part of
the code is tested not only by being run but also by checking that the
output match an expected output [Mt].
* Move on to FleXML v1.7 for the embeeded XML parsers. This version
is really less memory-demanding, which should allow you to use
larger files in SimGrid [AL].
+
+ * Inform valgrind about our contextes, so that it becomes usable
+ with the default (and more effecient) version of SimGrid
+ [contributed by Sékou Diakite, many thanks]
GRAS:
+ * Introduce a listener thread in charge of receiving incomming
+ messages from the network. It allows to overlap communication and
+ computation but most notably, it removes some stupid deadlocks due
+ to the fact that so far, a process could not send and receive at
+ the same time. This made most non trivial communication schema
+ impossible.
* Convert the PIDs from long int to int to match the MSG ones (and
linux ones too) [Mt]
* New function: gras_agent_spawn() to launch a new process on
* New module: xbt/str [Mt]
a ton of string utility functions (split, join, printf to a newly
allocated buffer, trim, etc)
+ * New module: xbt/hash [Mt]
+ SHA1 hashing algorithm (more to come if needed)
* New module: xbt/synchro [Mt]
synchronization tools (mutex and conditions) working the same way
in simulation and in real life (mainly useful for GRAS, but not
* Use the SURF command line configuration mechanism.
* 0-size tasks (for synchronization) should now work.
- --
+ -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Sun Apr 12 05:20:36 CEST 2009
-SimGrid (3.2) unstable; urgency=low
+SimGrid (3.2) stable; urgency=high
OVERALL CHANGES:
* Port to windows.
-- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri Mar 16 21:11:46 CET 2007
-SimGrid (3.1) unstable; urgency=low
+SimGrid (3.1) stable; urgency=high
General:
* Port to gcc 4.x
-- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 14 Jul 2006 01:32:27 +0200
-SimGrid (3.0.1) unstable; urgency=low
+SimGrid (3.0.1) stable; urgency=low
XBT:
* Unfortunately, I had missed 5 misnamed functions:
-- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr> Fri, 21 Oct 2005 14:42:20 +0200
-SimGrid (3.00) stable; urgency=low
+SimGrid (3.00) stable; urgency=high
SURF:
* New! Give the possibility to hijack the surf parser and thus bypass
- Get rid of libgrasutils.a since it makes more trouble than it solves.
Build examples against the RL library, since there is no way to disable
its creation for now.
+
+For information, the beginning of coding on GRAS was back in june
+2003. I guess that every line has been rewritten at least twice since
+then.
