changelog update

[simgrid.git] / ChangeLog

diff --git a/ChangeLog b/ChangeLog
index 909594f..38c6130 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,54 @@
 ----------------------------------------------------------------------------
 
 ----------------------------------------------------------------------------
 

-SimGrid (3.27.1) NOT RELEASED YET (v3.28 expected June 21. 2021, 03:32 UTC)
+SimGrid (3.28.1) NOT RELEASED YET (v3.29 expected September 22. 2021, 19:21 UTC)
+
+New features:
+ - Non-linear resource sharing: allows to dynamically change the resource
+   capacity. Users can change this capacity by setting a callback which will
+   be called when SimGrid is sharing the resource between the active
+   activities. An activity can be a task running, a read/write IO operation or a
+   communication flow.
+   - Callback signature: double (double capacity, int n_activities): given the
+     current resource's capacity and number of activities running on it,
+     returns the new capacity.
+   - Note that this callback is in the critical path of the system solve and
+   should not take long to execute.
+   - Examples:
+     - Disk: examples/cpp/io-degradation
+     - Link: examples/cpp/network-nonlinear
+     - CPU: examples/cpp/exec-cpu-nonlinear
+ - Dynamic factors for CPU and disk: similarly to dynamic network factors,
+ allows the user to set a callback which can affect the progress of activities
+ (multiplicative factor applied when updating the amount of work remaining).
+   - Example: examples/cpp/exec-cpu-factors
+
+S4U:
+ - New: s4u::Disk::set_sharing_policy() and s4u::Host::set_sharing_policy().
+   Allows the configuration of non-linear resource sharing for hosts and
+   disks.
+
+SMPI:
+ - TI Tracing/Replay:
+     - Multiple fixes to ensure reproducibility of tracing
+     - scan/excan can now be replayed
+     - wait action now uses ranks and not pid, as the other ones.
+     - smpi/init and smpi/finalization-barrier are now valid for replays.
+
+Documentation:
+  * New section "Release Notes" documenting recent and current developments.
+  * New section "Modeling I/O: the realistic way" presenting how to properly
+  model disks in SimGrid.
+
+Fixed bugs (FG#.. -> FramaGit bugs; FG!.. -> FG merge requests)
+ (FG: issues on Framagit; GF: issues on GForge; GH: issues on GitHub)
+ - FG#78: Multiple fixes for SMPI replay:
+    - TI tracing of allotallv/w was outputting wrong values
+    - MPI_LOGICAL in fortran is actually 32 bits wide, and not 8.
+----------------------------------------------------------------------------
+
+SimGrid (3.28) July 14. 2021
+
+The Victoriadagarna Release.

 
 New features:
  - C++ platform interface: Users can now describe their platform directly in C++.
 
 New features:
  - C++ platform interface: Users can now describe their platform directly in C++.


@@ -27,6 +75,7 @@ S4U:
    parameter by reference, instead of a pointer.
  - Fixed a bug where Activity::wait_for() killed the activity on timeout.
    Explicitly cancel the activity to get back to previous behavior.
    parameter by reference, instead of a pointer.
  - Fixed a bug where Activity::wait_for() killed the activity on timeout.
    Explicitly cancel the activity to get back to previous behavior.

+ - New: Link::set_concurrency_limit() to limit the amount of concurrent flows.

 
 SMPI:
  - The default SMPI compiler flags are no more taken from the environment.
 
 SMPI:
  - The default SMPI compiler flags are no more taken from the environment.


@@ -83,6 +132,17 @@ Models:
    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.
    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.

+ - Dynamic network factors: users can configure a callback to define
+   the network factors dynamically. This API is available at
+   simgrid::kernel::resource::NetworkModelIntf.
+   - Users have access to complete information about the current communication
+     to decide which factor to apply. This includes: message size, source and
+     destination hosts, links and zones traversed.
+   - Dynamic factors for both latency and bandwidth.
+   - For more details, see the example in (examples/cpp/network-factors).
+ - Plugin host_energy: the "watt_off" and "watt_per_state" host properties,
+   deprecated since version 3.24, are no longer supported. Instead, use
+   "wattage_off" and "wattage_per_state".

 
 XBT:
  - xbt_assert is not disabled anymore, even when built with enable_debug=off.
 
 XBT:
  - xbt_assert is not disabled anymore, even when built with enable_debug=off.


@@ -90,6 +150,9 @@ XBT:
 Documentation:
  - New tutorial: Model-checking and formal assessment
  - New sections: "Demystifying the routing" and "C++ platforms"
 Documentation:
  - New tutorial: Model-checking and formal assessment
  - New sections: "Demystifying the routing" and "C++ platforms"

+ - Update and improve the part on visualization in MPI and Algo tutorials.
+ - Improve the section on routing: how to define it, how it's used internally
+ - Fix many issues, broken links and missing references in doxygen and Sphinx

 
 LUA:
  - Lua platform files are deprecated. Their support will be dropped after v3.31.
 
 LUA:
  - Lua platform files are deprecated. Their support will be dropped after v3.31.