-SimGrid (3.30.1) NOT RELEASED YET (v3.31 expected March 20. 2022, 15:33 UTC)
+SimGrid (3.31.1) NOT RELEASED YET (v3.32 expected June 21. 2022, 09:13 UTC)
+
+S4U:
+ - Added the xbt_enforce macro. This has the same syntax as xbt_assert. The only difference is that an AssertionError
+ exception is thrown if the condition is not satisfied, instead of calling abort().
+
+Python:
+ - Added the following bindings / examples:
+ - Comm (now 100% covers the C++ interface):
+ - Comm.dst_data_size, Comm.mailbox, Comm.sender, Comm.start_time, Comm.finish_time
+ - Comm.state_str [examples: examples/python/comm-failure/, examples/python/comm-host2host/]
+ - Comm.remaining [examples: examples/python/comm-host2host/, examples/python/comm-suspend/]
+ - Comm.set_payload_size [example: examples/python/comm-host2host/]
+ - Comm.set_rate [example: examples/python/comm-throttling/]
+ - Comm.sendto, Comm.sendto_init, Comm.sendto_async [example: examples/python/comm-host2host/]
+ - Comm.start, Comm.suspend, Comm.resume [example: examples/python/comm-host2host/]
+ - Comm.test_any [example: examples/python/comm-testany/]
+ - Comm.wait_until [example: examples/python/comm-waituntil/]
+ - Engine:
+ - Engine.host_by_name [example: examples/python/comm-host2host/]
+ - Engine.mailbox_by_name_or_create [example: examples/python/comm-pingpong/]
+ - Engine.set_config
+ - Mailbox: Mailbox.ready [example: examples/python/comm-ready/]
+ - Ptask [example: examples/python/exec-ptask/]:
+ - this_actor.exec_init
+ - this_actor.parallel_execute
+ - Exec.suspend
+ - Exec.wait_for
+ - Added an AssertionError exception that may be thrown in case of error. For instance, creating tow hosts with the
+ same name will now throw this exception instead of killing the interpreter.
+
+Platform description & visualization:
+ - More robust sanity checks for platforms, to reject unallowed topologies with
+ a proper error message.
+ - One new C++ platform example, supernode.cpp. A Python script (supernode.py)
+ demonstrates how we can generate a nice graphical representation of the
+ platform.
+
+General:
+ - SimGrid now requires a compiler with C++17 support.
+ - Modified the host_by_name functions:
+ - Now, they return only hosts, not VMs, and in a much more efficient way.
+ - If one wants to find a VM by name, he now needs to know the host on
+ which it runs and call vm_by_name (or manually iterate over the list of hosts)
+
+Tools:
+ - Enhancements to the graphicator tool:
+ - Allow to dump the platform topology as a CSV file representing the edges
+ of the graph (in addition to the DOT format).
+ - Fix graphicator for "cluster" topologies (e.g. fat-tree, dragonfly).
+
+Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
+ (FG: issues on Framagit; GH: issues on GitHub)
+ - FG#105: "Variable penalty should not be negative!" with in-flight messages and bandwidth profiles
+ - FG#109: Application time reported by --cfg=smpi/display-timing:yes is wrong
+ - FG!109: Trigger new engine solve upon host events such as host on/off
+ - FG#110: Wait_any does not trigger new model solve when host events occur
+ - FG#111: Wrong execution time in rare cases when using multicore
+
+----------------------------------------------------------------------------
+
+S4U:
+ - kill signal Comm::on_completion that was not working anyway.
+ - Expose signals Activity::on_suspend and Activity::on_resume
+
+SimGrid (3.31) March 22. 2022.
The ненасильство release. We stand against war.
Against the agression by a sick system that forces peoples to take arms against each other.
-
MC:
- Rework the internals, for simpler and modern code. This shall unlock many future improvements.
- You can now define plugins onto the DFS explorer (previously called SafetyChecker), using the
- tracing: ensure that we dump the TI traces continuously during execution and
not just at the end, reducing memory cost and performance hit.
- Update OpenMPI collectives selection logic to match current one (4.1.2)
+ - Add a coherence check for collective operation order and root/MPI_Op
+ coherence. Potentially costly so not activated unless smpi:pendantic is set
+ or -analyze is given.
S4U:
- New signal: Engine::on_simulation_start_cb()
but some users may find it interesting too.
Models:
- - New model for parallel task: ptask_BMF.
- - More realistic sharing of heterogeneous resources compared to ptask_L07.
+ - New solver for parallel task: BMF.
+ - More realistic sharing of heterogeneous resources compared to the fair
+ bottleneck solver used by ptask_L07.
- Implement the BMF (Bottleneck max fairness) fairness.
- Improved resource sharing for parallel tasks with sub-flows (parallel
communications between same source and destination inside the ptask).
- Parameters:
- - "--cfg=host/model:ptask_BMF": enable the model.
+ - "--cfg=host/model:ptask_L07 --cfg=host/solver:bmf": enable the ptask
+ model with BMF solver.
- "--cfg=bmf/max-iterations: <N>": maximum number of iterations performed
by BMF solver (default: 1000).
- - "--cfg=bmf/selective-update:<true/false>": enable/disable the
- selective-update optimization. Only invalidates and recomputes modified
- parts of inequations system. May speed up simulation if sparse resource
- utilization (default: false).
+ - "--cfg=bmf/precision: <N>": numerical precision used when computing
+ resource sharing (default: 1e-12).
- This model requires Eigen3 library. Make sure Eigen3 is installed to use BMF.
General:
We wish that every user ask one question about SimGrid to celebrate.
On Mattermost, Stack Overflow or using the issues tracker.
-
New modeling features:
- Non-linear resource sharing, modeling resources whose performance heavily degrades with contention:
- The total capacity may be updated dynamically through a callback
