IntelMPI Starvation issue

IntelMPI Starvation issue

Looks like there is a starvation issue when using "wild" permanent recv requests, i.e. recv requests created with  MPI_Recv_init(...,...,..,MPI_ANY_SOURCE, ... It appears to me that this requests are more likely matched with send operations of low ranked peers, resulting in a possible starvation for higher ranked peers, especially in large jobs. At least, this is what I also observed with ITCA.

I observed this with intel-mpi/64/4.0.3/008

Could some Intel developer check or comment on this?


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Hi Lars,

I'm going to close this thread, as it is a duplicate of

James Tullos
Technical Consulting Engineer
Intel® Cluster Tools

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