SimGrid (3.32.1) not released yet (target december 22)
General:
+ - SimGrid now requires a compiler with C++17 support for public headers too.
+ Sibling projects should upgrade their FindSimGrid.cmake
- Remove the MSG API: its EOL was scheduled for 2020.
- Remove the Java bindings: they were limited to the MSG interface.
- On Windows, you now need to install WSL2 as the native builds are now disabled.
It was not really working anyway.
- Support for 32bits architecture is not tested anymore on our CI infrastructure.
It may break in the future, but we think that nobody's using SimGrid on 32 bits.
- - Remove the surf module. It was replaced by the kernel/models module, and that
+ - Remove the surf module. It was replaced by the kernel/models module, and that
refactoring took almost 10 years to properly complete.
S4U:
Comm::set_payload_size() to change the size of the simulated data.
- New function: Engine::flatify_platform(), to get a fully detailed vision of the
configured platform.
+ - Full simDAG integration: Activity::start() actually starts only when all dependencies
+ are fullfiled. If it cannot be started right away, it will start as soon as it becomes
+ possible.
+ - Allow to set a concurrency limit on disks and hosts, as it was already the case for links.
+ - Rename Link::get_usage() to Link::get_load() for consistency with Host::
+
+New plugin: Operation
+ - Operations are designed to represent workflows, i.e, graphs of repeatable Activities.
+ - Documentation: https://simgrid.frama.io/simgrid/Plugins.html#operation
+ - Examples: examples/cpp/operation-*
+
+New plugin: Battery
+ - Enable the management of batteries on hosts.
+ - Documentation: https://simgrid.frama.io/simgrid/Plugins.html#battery
+ - Examples: examples/cpp/battery-*
Kernel:
- - optimize an internal datastructure, leading to a potentially big
- performance gain (in particular with many detached comms)
+ - optimize an internal datastructure (use a set instead of a list for ongoing activities),
+ leading to a potentially big performance gain, in particular with many detached comms.
MPI:
- New option smpi/barrier-collectives to add a barrier to some collectives
to detect dangerous code that /may/ work on some MPI implems.
+ - New function SMPI_app_instance_start() to easily start a MPI instance in your S4U simulation.
Models:
- Write the section of the manual about models, at least.
with the default host model, as it should.
- Rename option "surf/precision" to "precision/timing" for clarity.
- Rename option "maxmin/precision" to "precision/work-amount" for clarity.
+ - New function: Engine::flatify_platform() to debug your platform.
sthread:
- Implement pthread_join in MC mode.
- Implement semaphore functions in sthread.
+ - Add an intricated way to verify the access to non-reentrant data structures
+ It requires code annotation, as shown in examples/sthread/stdobject/stdobject.cpp
+
+Model checking:
+ - Synchronize the MBI tests with upstream.
+ - Show the full actor bactraces when replaying a MC trace (with model-check/replay)
+ and the status of all actors on deadlocks in MC mode.
+ - The safety/stateless aspects of the MC are now enabled by default in all simgrid builds.
+ Liveness and stateful aspects are still controled by the enabling_model-checking
+ configuration option.
+ - Stateless model-checking is now usable on any system, including Mac OSX and ARM processors.
XBT:
- simgrid::xbt::cmdline and simgrid::xbt::binary_name are gone.
Important user-visible changes:
- SimGrid now requires a compiler with C++14 support.
- Sibling projects should upgrade their FindSimgrid.cmake
+ Sibling projects should upgrade their FindSimGrid.cmake
- Surf precision default value is now 1e-9, instead of 1e-5. This was changed as
several users had difficulties to understand issues when using high bandwidth or
small latency events. The new value was already the default for SMPI and
