diff options
Diffstat (limited to 'src/H5FDmpio.c')
| -rw-r--r-- | src/H5FDmpio.c | 67 |
1 files changed, 50 insertions, 17 deletions
diff --git a/src/H5FDmpio.c b/src/H5FDmpio.c index 585aa47..5c48a10 100644 --- a/src/H5FDmpio.c +++ b/src/H5FDmpio.c @@ -1070,6 +1070,12 @@ H5FD_mpio_get_eof(H5FD_t *_file) * * Robb Matzke, 1999-08-06 * Modified to work with the virtual file layer. + * + * Quincey Koziol, 2002-05-14 + * Only call MPI_Get_count if we can use MPI_BYTE for the MPI type + * for the I/O transfer. Someday we might include code to decode + * the MPI type used for more complicated transfers and call + * MPI_Get_count all the time. *------------------------------------------------------------------------- */ static herr_t @@ -1191,24 +1197,37 @@ H5FD_mpio_read(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t dxpl_id, haddr_t add * Many systems don't support MPI_Get_count so we need to do a * configure thingy to fix this. */ - /* How many bytes were actually read? */ - if (MPI_SUCCESS != MPI_Get_count(&mpi_stat, MPI_BYTE, &bytes_read)) - HRETURN_ERROR(H5E_INTERNAL, H5E_MPI, FAIL, "MPI_Get_count failed"); + /* Calling MPI_Get_count with "MPI_BYTE" is only valid when we actually + * had the 'buf_type' set to MPI_BYTE -QAK + */ + if(use_types_this_time) { + /* Figure out the mapping from the MPI 'buf_type' to bytes, someday... + * If this gets fixed (and MPI_Get_count() is reliable), the + * kludge below where the 'bytes_read' value from MPI_Get_count() is + * overwritten with the 'size_i' parameter can be removed. -QAK + */ + } /* end if */ + else { + /* How many bytes were actually read? */ + if (MPI_SUCCESS != MPI_Get_count(&mpi_stat, MPI_BYTE, &bytes_read)) + HRETURN_ERROR(H5E_INTERNAL, H5E_MPI, FAIL, "MPI_Get_count failed"); + } /* end else */ #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'c']) fprintf(stdout, "In H5FD_mpio_read after Get_count size_i=%d bytes_read=%d\n", size_i, bytes_read ); #endif -#endif /*Robb's kludge*/ -#if 1 +#endif /* H5_HAVE_MPI_GET_COUNT */ + /* * KLUGE rky 1998-02-02 * MPI_Get_count incorrectly returns negative count; fake a complete * read. */ bytes_read = size_i; -#endif + + /* Check for read failure */ if (bytes_read<0 || bytes_read>size_i) HRETURN_ERROR(H5E_IO, H5E_READERROR, FAIL, "file read failed"); @@ -1228,11 +1247,6 @@ H5FD_mpio_read(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t dxpl_id, haddr_t add } } -#ifdef NO - /* Forget the EOF value (see H5FD_mpio_get_eof()) --rpm 1999-08-06 */ - file->eof = HADDR_UNDEF; -#endif - #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'t']) fprintf(stdout, "Leaving H5FD_mpio_read\n" ); @@ -1334,6 +1348,12 @@ H5FD_mpio_read(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t dxpl_id, haddr_t add * * Quincey Koziol, 2002-05-10 * Removed allsame code, keying off the type parameter instead. + * + * Quincey Koziol, 2002-05-14 + * Only call MPI_Get_count if we can use MPI_BYTE for the MPI type + * for the I/O transfer. Someday we might include code to decode + * the MPI type used for more complicated transfers and call + * MPI_Get_count all the time. *------------------------------------------------------------------------- */ static herr_t @@ -1474,24 +1494,37 @@ H5FD_mpio_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, * Many systems don't support MPI_Get_count so we need to do a * configure thingy to fix this. */ - /* How many bytes were actually written? */ - if (MPI_SUCCESS!= MPI_Get_count(&mpi_stat, MPI_BYTE, &bytes_written)) - HGOTO_ERROR(H5E_INTERNAL, H5E_MPI, FAIL, "MPI_Get_count failed"); + /* Calling MPI_Get_count with "MPI_BYTE" is only valid when we actually + * had the 'buf_type' set to MPI_BYTE -QAK + */ + if(use_types_this_time) { + /* Figure out the mapping from the MPI 'buf_type' to bytes, someday... + * If this gets fixed (and MPI_Get_count() is reliable), the + * kludge below where the 'bytes_written' value from MPI_Get_count() is + * overwritten with the 'size_i' parameter can be removed. -QAK + */ + } /* end if */ + else { + /* How many bytes were actually written? */ + if (MPI_SUCCESS!= MPI_Get_count(&mpi_stat, MPI_BYTE, &bytes_written)) + HGOTO_ERROR(H5E_INTERNAL, H5E_MPI, FAIL, "MPI_Get_count failed"); + } /* end else */ #ifdef H5FDmpio_DEBUG if (H5FD_mpio_Debug[(int)'c']) fprintf(stdout, "In H5FD_mpio_write after Get_count size_i=%d bytes_written=%d\n", size_i, bytes_written ); #endif -#endif /*Robb's kludge*/ -#if 1 +#endif /* H5_HAVE_MPI_GET_COUNT */ + /* * KLUGE rky, 1998-02-02 * MPI_Get_count incorrectly returns negative count; fake a complete * write. */ bytes_written = size_i; -#endif + + /* Check for write failure */ if (bytes_written<0 || bytes_written>size_i) HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "file write failed"); |