diff options
Diffstat (limited to 'tools/h5diff/ph5diff_main.c')
| -rw-r--r-- | tools/h5diff/ph5diff_main.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/tools/h5diff/ph5diff_main.c b/tools/h5diff/ph5diff_main.c index 81d64ea..cd252b9 100644 --- a/tools/h5diff/ph5diff_main.c +++ b/tools/h5diff/ph5diff_main.c @@ -186,10 +186,16 @@ ph5diff_worker(int nID) memset(outBuff, 0, OUTBUFF_SIZE); outBuffOffset = 0; - MPI_Send(&nfound, 1, MPI_LONG_LONG, 0, MPI_TAG_TOK_RETURN, MPI_COMM_WORLD); + /* Since the data type of diff value is hsize_t which can + * be arbitary large such that there is no MPI type that + * matches it, the value is passed between processes as + * an array of bytes in order to be portable. But this + * may not work in non-homogeneous MPI environments. + */ + MPI_Send(&nfound, sizeof(nfound), MPI_BYTE, 0, MPI_TAG_TOK_RETURN, MPI_COMM_WORLD); } else - MPI_Send(&nfound, 1, MPI_LONG_LONG, 0, MPI_TAG_DONE, MPI_COMM_WORLD); + MPI_Send(&nfound, sizeof(nfound), MPI_BYTE, 0, MPI_TAG_DONE, MPI_COMM_WORLD); } else if(Status.MPI_TAG == MPI_TAG_END) |