[OMPI users] Problems with computation-communication overlap in non-blocking mode

Dear all, I have a simple MPI program with two processes using non-blocking communication illustrated bellow: process 0: process 1: MPI_Isend MPI_Irecv compute stage compute stage MPI_Wait MPI_Wait Actual communication is performed by offloading it to another thre

Re: [OMPI users] OpenMPI job initializing problem

On 03/06/2014 04:52 PM, Beichuan Yan wrote: No, I did all these and none worked. I just found, with exact the same code, data and job settings, a job can really run one day while cannot the other day. It is NOT repeatable. I don't know what the problem is: hardware? OpenMPI? PBS Pro? Anyway,