I was able to reproduce with my own test (https://github.com/jeffhammond/HPCInfo/blob/master/mpi/bugs/iprobe-overflow.c) with Intel MPI 2019, so I will report that bug to the Intel MPI team. It should be easy enough for them to figure out if this bug is from MPICH or not.2139000000 iterations, 627.143272 seconds
2140000000 iterations, 627.436206 seconds
2141000000 iterations, 627.729135 seconds
2142000000 iterations, 628.022049 seconds
2143000000 iterations, 628.315015 seconds
2144000000 iterations, 628.608066 seconds
2145000000 iterations, 628.901065 seconds
2146000000 iterations, 629.193992 seconds
2147000000 iterations, 629.488107 seconds
Abort(738833413) on node 0 (rank 0 in comm 0): Fatal error in PMPI_Iprobe: Invalid communicator, error stack:
PMPI_Iprobe(123): MPI_Iprobe(src=MPI_ANY_SOURCE, tag=MPI_ANY_TAG, MPI_COMM_WORLD, flag=0x7ffdf75a396c, status=0x7ffdf75a3970) failed
PMPI_Iprobe(90).: Invalid communicator
Jeff, who works for Intel but knows more about MPICH than Intel MPIOn Mon, Jan 21, 2019 at 11:19 AM Joachim Protze via discuss <discuss@mpich.org> wrote:Hi all,
we detected the behavior with IntelMPI 2019 (which is based on MPICH
3.3). Reproducing it with MPICH-3.3 was not yet successful. But I fear,
that our built of MPICH just not uses the necessary code path / build flags.
When calling MPI_Iprobe with the same communicator for ~2^31 times
(which can take 10-30 minutes), the execution stops with:
Abort(201962501) on node 0 (rank 0 in comm 0): Fatal error in
PMPI_Iprobe: Invalid communicator, error stack:
PMPI_Iprobe(123): MPI_Iprobe(src=MPI_ANY_SOURCE, tag=MPI_ANY_TAG,
MPI_COMM_WORLD, flag=0x7ffd925056c0, status=0x7ffd92505694) failed
PMPI_Iprobe(90).: Invalid communicator
From my understanding of the referenced MPICH code lines, I guess, that
the ref-count for MPI_COMM_WORLD overflows, which triggers this error
message.
Best
Joachim
--
Dipl.-Inf. Joachim Protze
IT Center
Group: High Performance Computing
Division: Computational Science and Engineering
RWTH Aachen University
Seffenter Weg 23
D 52074 Aachen (Germany)
Tel: +49 241 80- 24765
Fax: +49 241 80-624765
protze@itc.rwth-aachen.de
www.itc.rwth-aachen.de
_______________________________________________
discuss mailing list discuss@mpich.org
To manage subscription options or unsubscribe:
https://lists.mpich.org/mailman/listinfo/discuss
--