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MPI_Win_unlock_all performance

luiceur
Beginner
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I have been running some performance tests(Intel 17 and 18) and I have noticed that MPI_Win_unlock_all performance is surprisingly excessive with even a small number MPI processes. I was wondering if I could know the reasons and if this is already known.

 

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ArthurRatz
Black Belt
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luiceur, try to use MPI_Win_fence(...) instead of MPI_Win_unlock_all, and then compute the execution time.

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