msm: semaphore to limit CPUs + better split strategy (up to 25% perf boost on 96cores)#403
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msm: semaphore to limit CPUs + better split strategy (up to 25% perf boost on 96cores)#403
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yelhousni
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May 17, 2023
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yelhousni
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I get the logic of the split heuristics and the semaphore when NbTasks < NumCPU and it look good to me — but that's all ^^
I guess the PR might need an additional review of the code?
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This PR fixes #269 by introducing a semaphore when the MSM has a
NbTasksparameter smaller than available CPUs.Additionally, it revisits the heuristic to decide if it's worth it to split a msm into 2 (parallelization) and this result in some noticeable gains on our reference machine (aws hpc w/ 96 cores);