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.
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.
- 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().
