X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/7129abc5fe14ea134a324c934c9da748fe6544a6..bdd17c447432a0a638682a1e301b990e401fa5f1:/ChangeLog

diff --git a/ChangeLog b/ChangeLog
index 893664d9bc..e90432e99a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -6,13 +6,22 @@ S4U:
  - New function NetZone::add_route(host1, host2, links) when you don't need gateways
    Also add a variant with s4u::Link, when you don't want to specify the directions
    on symmetric routes.
- - Introduce a Mailbox::get_async() with no payload parameter. You can use the new 
+ - Introduce a Mailbox::get_async() with no payload parameter. You can use the new
    Comm::get_payload() once the communication is over to retrieve the payload.
+ - Implement recursive mutexes. Simply pass true to the constructor to get one.
+ - Introduce a new MessageQueue abstraction and associated Mess simulated object.
+   The behavior of a MessageQueue is similar to that of a Mailbox, but intended for
+   control messages that do not incur any simulated cost. Information is automagically
+   transported over thin air between producer and consumer. See examples/cpp/mess-wait
 
 SMPI:
  - New SMPI_app_instance_join(): wait for the completion of a started MPI instance
  - MPI_UNIVERSE_SIZE now initialized to the total amount of hosts in the platform
 
+sthread:
+ - Implement recursive pthreads.
+ - Many bug fixes.
+
 Python:
  - Make the host_load plugin available from Python. See examples/python/plugin-host-load
  - Mailbox::get_async() does not return a pair anymore. Use comm.get_payload() instead.
@@ -27,10 +36,17 @@ C API:
 Plugins:
  - Revamp the battery plugin: rewrite completely the API, for a better usability.
    The examples were updated accordingly.
- - Revamp of the Photovoltaic plugin: now called SolarPanel and complete rewrite of the API 
+ - Revamp of the Photovoltaic plugin: now called SolarPanel and complete rewrite of the API
  - Add chiller plugin: enable the management of chillers consuming electrical energy
    to compensate heat generated by hosts.
 
+Kernel:
+ - optimize an internal data structure (replace boost::circular_buffer_space_optimized by
+   std::deque to store pending and unmatched Comms in Mailboxes). It is actually a revert
+   to what was used a few years back. The boost structure had a lower memory footprint than
+   deques, but it appeared that their "space_optimized" character was generating a huge lot
+   of refcount changes on the stored Comms.
+
 ----------------------------------------------------------------------------
 
 SimGrid (3.34) June 26. 2023