IntelMPI Starvation issue

IntelMPI Starvation issue

Hi!
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?

Thanks

2 posts / 0 new
Last post
For more complete information about compiler optimizations, see our Optimization Notice.

Hi Lars,

I'm going to close this thread, as it is a duplicate of http://software.intel.com/en-us/forums/topic/394242

Sincerely,
James Tullos
Technical Consulting Engineer
Intel® Cluster Tools

Leave a Comment

Please sign in to add a comment. Not a member? Join today