----------------------------------------------------------------------------
-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++.
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.
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.
+ 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.
+ 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.
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.
