SimGrid (3.28.1) NOT RELEASED YET (v3.29 expected September 22. 2021, 19:21 UTC)
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
+ - Non-linear resource sharing modeling resources whose performance drops with contention.
+ - The total capacity may be updated dynamically through a callback
+ and depends on the idle capacity and the number of concurrent flows.
- 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).
+ - Dynamic factors: model variability in the speed of activities
+ - The factor of activities can be updated dynamically through a callback
+ and depends on (TODO: unsure)
+ - (activities with factor=0.5 need twice the instantaneous speed for the same progression)
+ - This can model variation in the progression speed over time,
+ or the tasks' CPU affinity, related the "Unrelated Machines" problem in scheduling,
+ or TODO: speak of debiasing?
+ - This existed for network, and now for CPU and disk too.
+ - For that, resources can take a callback that computes the activity factor
+ (multiplicative factor applied when updating the amount of work remaining).
- Example: examples/cpp/exec-cpu-factors
Python:
