SimGrid (3.27.1) NOT RELEASED YET (v3.28 expected June 21. 2021, 03:32 UTC)
New features:
- - New plugin: Producer-Consumer with monitor. Just requires to include the
- include/simgrid/plugins/ProducerConsumer.hpp header to be used. See the
+ - New plugin: Producer-Consumer with monitor. Just requires to include the
+ include/simgrid/plugins/ProducerConsumer.hpp header to be used. See the
associated example (examples/cpp/plugin-prodcons).
S4U:
- The default SMPI compiler flags are no more taken from the environment.
They can be explicitly set through cmake parameters SMPI_C_FLAGS,
SMPI_CXX_FLAGS, or SMPI_Fortran_FLAGS.
-
+ - New options:
+ --cfg=smpi/finalization-barrier: which can be used to add
+ a barrier inside MPI_Finalize. This can help for some codes which cleanup
+ data attached to a process, but still used in other SMPI processes.
+ --cfg=smpi/errors-are-fatal: True by default, behaves like if MPI_ERRORS_RETURN
+ is active when set to false, to keep going after a small error
+ --cfg=smpi/pedantic: True by default. Do not report some harmless MPI errors
+ which may or may not be problematic in the end.
LUA:
- Lua platform files are deprecated. Their support will be dropped after v3.31.
+Simix:
+ - Legacy functions deprecated in this release: SIMIX_get_clock(), SIMIX_run().
+
+Models:
+ - Changed internal implementation of bandwidth factors in network models.
+ Models affected: CM02, LV08 (default), SMPI, IB.
+ Configuration affected: "network/bandwidth-factors" and "smpi/bw-factors".
+ Bandwidth factors are applied to communications to describe that users
+ cannot use 100% of the available bandwidth. For example, the default network model,
+ LV08, applies a factor of 0.97 to the bandwidth. In older versions, this
+ behavior was implemented by limiting the bandwidth available in the LMM
+ system for this flow. This may give the false impression that there is
+ bandwidth available for other flows due to its underutilization, especially
+ for the dynamic bandwidth factors used in SMPI models.
+ To avoid this, we have modified the implementation so that each flow uses the
+ maximum physical bandwidth according to the LMM system.
+ However, the actual throughput of the flow seen by the user is defined by
+ the physical bandwidth multiplied by the bandwidth factor.
+ This change impacts on the simulation results for all network models on
+ which we have bandwidth factors configured.
+ *****************************************
+ *DO NOT MIX 3.28 RESULTS WITH OLDER ONES*
+ *****************************************
+ This change may impact on the timing of your simulation results.
+ Take care when comparing simulations from different SimGrid's
+ versions. Sorry for the inconvenience.
+
XBT:
- xbt_assert is not disabled anymore, even when built with enable_debug=off.
- FG#47: Complete and fix tests from teshuite/s4u/activity-lifecycle
- FG#64: Configuring smpi/IB-penalty-factors
- FG#67: Running computation concurrently with MPI_Iallreduce
- - FG#68: Tutorial misleading users of pre-v3.26 versions of SimGrid
+ - FG#69: Tutorial misleading users of pre-v3.26 versions of SimGrid
+ - FG#71: Segmentation fault on invalid gw_src/gw_dst
- GH#322: Issue when an actor kills his host vm
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