Re: [OMPI users] custom sparse collective non-reproducible deadlock, MPI_Sendrecv, MPI_Isend/MPI_Irecv or MPI_Send/MPI_Recv question

Hi All, Update to the original posting: METHOD4 also resulted in a deadlock on system HPC2 after 5h of run with 32 MPI tasks; also, "const int scale=1;" was missing in the code snippet posted above. --Evghenii > Message: 2 > Date: Sun, 18 Sep 2011 02:06:33 + > Fro

[OMPI users] custom sparse collective non-reproducible deadlock, MPI_Sendrecv, MPI_Isend/MPI_Irecv or MPI_Send/MPI_Recv question

Hi All, My MPI program's basic task consists of regularly establishing point-to-point communication with other procs via MPI_Alltoall, and then to communicate data. I tested it on two HPC clusters with 32-256 MPI tasks. One of the systems (HPC1) this custom collective runs flawlessly, while on