X-Git-Url: http://bilbo.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/460c1afae0329ce01f6c3e7f9131ffe845be0cb4..2b47959f389e1fad5f0c1682095754ef8723027b:/ChangeLog

diff --git a/ChangeLog b/ChangeLog
index 0e36dac86b..d0f8191fb5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,8 +2,8 @@ SimGrid (3.30.1) NOT RELEASED YET (v3.31 expected March 20. 2022, 15:33 UTC)
 
 MC:
  - Rework the internals, for simpler and modern code. This shall unlock many future improvements.
- - You can now define plugins onto SafetyChecker (a simple DFS explorer), using the declared signals.
-   See CommunicationDeterminism for an example.
+ - You can now define plugins onto the DFS explorer (previously called SafetyChecker), using the 
+   declared signals. See CommunicationDeterminism for an example.
  - Support mutex, semaphore and barrier in DPOR reduction
  - Seems to work on Arm64 architectures too.
  - Display a nice error message when ptrace is not usable.
@@ -21,9 +21,14 @@ SMPI:
 
 S4U:
  - New signal: Engine::on_simulation_start_cb()
+ - Introduce a new execution mode with this_actor::thread_execute(). This simulate 
+   the execution of a certain amount of flops by multiple threads ran by a host. Each
+   thread executes the same number of flops, given as argument. An example of this new
+   function can be found in examples/cpp/exec-threads.
  - Reimplementation of barriers natively. 
    Previously, they were implemented on top of s4u::Mutex and s4u::ConditionVariable. 
    The new version should be faster (and can be used in the model-checker).
+ - Actor::get_restart_count(): Returns the number of reboots that this actor did.
 
 MSG:
  - MSG_barrier_destroy now expects a non-const msg_barrier parameter.
@@ -32,7 +37,26 @@ New plugin: the Chaos Monkey (killing actors at any time)
  - Along with the new simgrid-monkey script, it tests whether your simulation 
    resists resource failures at any possible timestamp in your simulation. 
  - It is mostly intended to test the simgrid core in extreme conditions, 
-   but users may find it interesting too.
+   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.
+   - 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=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).
+   - ATTENTION: this model requires Eigen3 library. If you install SimGrid
+     from source, please see the "Installing from source" section:
+     https://simgrid.org/doc/latest/Installing_SimGrid.html#installing-from-the-source.
+     No action is required if you use pre-compiled packages.
 
 XBT:
  - Drop xbt_dynar_shrink().