Describe the bug
Running a large problem where the number of shared nodes exceeds the capacity of MPI_TAG a 16-bit signed integer, we have an overflow problem in the MPI_TAG.
Abort(671723268) on node 3 (rank 3 in comm 0): Fatal error in PMPI_Isend: Invalid tag, error stack:
PMPI_Isend(148): MPI_Isend(buf=0x7fff7328ea78, count=1, MPI_DOUBLE, dest=5, tag=524547, MPI_COMM_WORLD, request=0xc54a70fc) failed
PMPI_Isend(95).: Invalid tag, value is 524547
To Reproduce
Run a problem where the number of domain shared nodes exceed 32,768.
Expected behavior
Pass MPI_TAG without an overflow
Runtime environment (please complete the following information):
Frontera
Additional context
How can we alter this prototype code to avoid MPI_TAG overflows? At the moment, the node id or particle id is used as the MPI_TAG.
Describe the bug Running a large problem where the number of shared nodes exceeds the capacity of MPI_TAG a 16-bit signed integer, we have an overflow problem in the MPI_TAG.
To Reproduce Run a problem where the number of domain shared nodes exceed 32,768.
Expected behavior Pass
MPI_TAGwithout an overflowRuntime environment (please complete the following information):
Additional context How can we alter this prototype code to avoid
MPI_TAGoverflows? At the moment, the node id or particle id is used as theMPI_TAG.