Which version of Open MPI are you running ? This reminds me of a bug in CMA that has already been fixed.
can you try again with mpirun --mca btl_vader_single_copy_mechanism none ... Cheers, Gilles On Fri, Apr 13, 2018 at 1:51 PM, Kaiming Ouyang <kouya...@ucr.edu> wrote: > Hi all, > I am trying to test the bandwidth of intra-MPI send and recv. The code is > attached here. When I give the input 2048 (namely each process will send and > receive 2GB data), the program reported: > Read 2147479552, expected 2147483648, errno = 95 > Read 2147479552, expected 2147483648, errno = 98 > Read 2147479552, expected 2147483648, errno = 98 > Read 2147479552, expected 2147483648, errno = 98 > > Does this mean Openmpi does not support the send and recv where data size is > larger than 2GB, or is there a bug in my code? Thank you. > > > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://lists.open-mpi.org/mailman/listinfo/users _______________________________________________ users mailing list users@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/users
