SimGrid (3.29.1) NOT RELEASED YET (v3.30 expected December 21. 2021, 15:59 UTC)
+Main user-visible changes:
+ - The SimDag API for the simulation of the scheduling of Directed Acyclic
+ Graphs has been dropped. It was marked as deprecated for a couple of years.
+ We finally complete the implementation of what has been called SimDag++
+ internally, i.e., porting the different features of SimDag on top of S4U.
+ The new way to simulate the execution of dependent activities directly by
+ maestro (without any other actor) is details in the examples/cpp/dag-* series
+ of examples.
+ - The removal of SimDag led us to also remove the export to Jedule files that
+ was tightly coupled to SimDag. The instrumentation of DAG simulation is still
+ possible through the regular instrumentation API based on the Paje format.
+
S4U:
- New function: Engine::run_until(date), to split the simulation.
- New signal: Activity::on_veto, to detect when an activity fails to start.
- New function: Engine::track_vetoed_activities() to interrupt run()
when an activity fails to start, and to keep track of such activities.
Please see the corresponding example for more info.
+ - Introduce on_X_cb() functions for all signals, to attach a new
+ callback to the signal X. The signal variables are now hidden and
+ only these functions should be used.
+ Rational: this enables the usual deprecation schema where functions
+ remain for 4 releases when we need to modify the signals, while the
+ current code with the signal variables directly visible prevent any
+ smooth transition.
SMPI:
- Dynamic costs for MPI operations: New API to allow users to dynamically
Documentation:
- New section: "SimGrid MPI calibration of a Grid5000 cluster"
presenting how to properly calibrate MPI communications in SimGrid.
+ - Complete and reword the platform section, which is now completed.
Python:
- Thread contexts are used by default with Python bindings. Other kinds of
(FG: issues on Framagit; GF: issues on GForge; GH: issues on GitHub)
- FG#95: Wrong computation time for multicore execution after pstate change
- FG#97: Wrong computation time for ptask+multicore+pstates
+ - FG#99: Weird segfault when not sealing an host
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SimGrid (3.29) October 7. 2021
