https://community.intel.com/t5/Intel-MPI-Library/IntelMPI-Starvation-issue/m-p/933837#M2593 <P>Hi,</P> <P>l observed an starvation issue in intel-mpi/64/4.0.3/008 when using persistent "wild" recv request, i.e. setting up persistent recv requests with MPI_ANY_SOURCE. Examining several event traces with ITCA makes me assume that those recv requests are more likely matched with send operations from processes with lower ranks numbers. This would be suboptimal as it leads to starvation of higher ranked process in large MPI jobs.</P> <P>Is this the right place to post such issues?</P> Wed, 26 Jun 2013 08:32:38 GMT Lars_S_1 2013-06-26T08:32:38Z https://community.intel.com/t5/Intel-MPI-Library/IntelMPI-Starvation-issue/m-p/933837#M2593 <P>Hi,</P> <P>l observed an starvation issue in intel-mpi/64/4.0.3/008 when using persistent "wild" recv request, i.e. setting up persistent recv requests with MPI_ANY_SOURCE. Examining several event traces with ITCA makes me assume that those recv requests are more likely matched with send operations from processes with lower ranks numbers. This would be suboptimal as it leads to starvation of higher ranked process in large MPI jobs.</P> <P>Is this the right place to post such issues?</P> Wed, 26 Jun 2013 08:32:38 GMT https://community.intel.com/t5/Intel-MPI-Library/IntelMPI-Starvation-issue/m-p/933837#M2593 Lars_S_1 2013-06-26T08:32:38Z https://community.intel.com/t5/Intel-MPI-Library/IntelMPI-Starvation-issue/m-p/933838#M2594 <P>Hi Lars,</P> <P>Yes, this is an appropriate place to discuss this.&nbsp; Can you provide the trace file?&nbsp; Or do you have a sample code showing this behavior?</P> <P>Sincerely,<BR /> James Tullos<BR /> Technical Consulting Engineer<BR /> Intel® Cluster Tools</P> Tue, 09 Jul 2013 20:36:04 GMT https://community.intel.com/t5/Intel-MPI-Library/IntelMPI-Starvation-issue/m-p/933838#M2594 James_T_Intel 2013-07-09T20:36:04Z