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
+New modeling features:
+ - Non-linear resource sharing for decay models:
+ - The total capacity may depend on the number of concurrent usages
+ - For that, resources can take a callback that computes the capacity
+ depending on the idle capacity and the number of concurrent usages
+ - Examples (both cpp and python): io-degradation, network-nonlinear, 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).
Python:
- Added support to programmatic platform creation in Python.
- - Several new methods were added to Python interface. For more details, see
- the corresponding documentation.
- - New python examples:
- - Clusters: examples/python/clusters-multicpu
- - Disk: examples/python/io-degradation
- - CPU: examples/python/exec-cpu-nonlienar
- - Link: examples/python/network-nonlinear
+ Example: examples/python/clusters-multicpu
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.
+ - Disk and Host now have a set_sharing_policy() too, for non-linear sharing.
+ This can only be set through the API, not through XML files.
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.
+ - 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.
+ * New section "Modeling I/O: the realistic way" presenting how to properly model disks in SimGrid.
* Improvements in API Reference for C++ and Python interfaces.
ns-3 model:
