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author | Jonathan Kim <jkm@hdfgroup.org> | 2012-11-05 20:09:19 (GMT) |
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committer | Jonathan Kim <jkm@hdfgroup.org> | 2012-11-05 20:09:19 (GMT) |
commit | 51cf093853e2278dd890b6def1d9cf6806fcb8ae (patch) | |
tree | f3d65b05d433ea30f13b75d4cfff59b66888f143 /src/H5Dmpio.c | |
parent | 6bbeb4a437c8c49b6ba2e9785aad76d67fd9c683 (diff) | |
download | hdf5-51cf093853e2278dd890b6def1d9cf6806fcb8ae.zip hdf5-51cf093853e2278dd890b6def1d9cf6806fcb8ae.tar.gz hdf5-51cf093853e2278dd890b6def1d9cf6806fcb8ae.tar.bz2 |
[svn-r23011] Purpose:
HDFFV-8146 - Remove "multi-chunk IO without optimization" sub-feature from MPI I/O optimization for chunked dataset feature
Description:
The “multi-chunk IO without optimization” feature is removed and made the related xfer property (H5FD_MPIO_CHUNK_MULTI_IO) go directly to “multi-chunk-io” feature.
Also update/fix/cleanup testings (chunk collective IO and actual chunk opt mode) accordingly.
Merged from HDF5 trunk r22992.
Tested:
jam-pp (linux32-LE), koala (linux64-LE), ostrich (linuxppc64-BE), fred (mac64-LE), linew (solaris-BE), koala-pp, wallby-pp, cmake (jam-pp), Windows (32-LE cmake)
Diffstat (limited to 'src/H5Dmpio.c')
-rw-r--r-- | src/H5Dmpio.c | 302 |
1 files changed, 53 insertions, 249 deletions
diff --git a/src/H5Dmpio.c b/src/H5Dmpio.c index c2d964e..900ad6a 100644 --- a/src/H5Dmpio.c +++ b/src/H5Dmpio.c @@ -105,10 +105,9 @@ static herr_t H5D__chunk_collective_io(H5D_io_info_t *io_info, static herr_t H5D__multi_chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_info, H5D_chunk_map_t *fm, H5P_genplist_t *dx_plist); -static herr_t H5D__multi_chunk_collective_io_no_opt(H5D_io_info_t *io_info, - const H5D_type_info_t *type_info, H5D_chunk_map_t *fm, H5P_genplist_t *dx_plist); static herr_t H5D__link_chunk_collective_io(H5D_io_info_t *io_info, - const H5D_type_info_t *type_info, H5D_chunk_map_t *fm, int sum_chunk); + const H5D_type_info_t *type_info, H5D_chunk_map_t *fm, int sum_chunk, + H5P_genplist_t *dx_plist); static herr_t H5D__inter_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_info, const H5S_t *file_space, const H5S_t *mem_space); @@ -586,6 +585,12 @@ done: * Programmer: Muqun Yang * Monday, Feb. 13th, 2006 * + * Modification: + * - Refctore to remove multi-chunk-without-opimization feature and update for + * multi-chunk-io accordingly + * Programmer: Jonathan Kim + * Date: 2012-10-10 + * *------------------------------------------------------------------------- */ static herr_t @@ -594,8 +599,6 @@ H5D__chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_inf { H5P_genplist_t *dx_plist; /* Pointer to DXPL */ H5FD_mpio_chunk_opt_t chunk_opt_mode; - H5D_mpio_actual_chunk_opt_mode_t actual_chunk_opt_mode; - H5D_mpio_actual_io_mode_t actual_io_mode; int io_option = H5D_MULTI_CHUNK_IO_MORE_OPT; int sum_chunk = -1; #ifdef H5_HAVE_INSTRUMENTED_LIBRARY @@ -617,10 +620,12 @@ H5D__chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_inf /* Check the optional property list on what to do with collective chunk IO. */ chunk_opt_mode = (H5FD_mpio_chunk_opt_t)H5P_peek_unsigned(dx_plist, H5D_XFER_MPIO_CHUNK_OPT_HARD_NAME); - if(chunk_opt_mode == H5FD_MPIO_CHUNK_ONE_IO) + if(H5FD_MPIO_CHUNK_ONE_IO == chunk_opt_mode) io_option = H5D_ONE_LINK_CHUNK_IO; /*no opt*/ - else if(chunk_opt_mode == H5FD_MPIO_CHUNK_MULTI_IO) - io_option = H5D_MULTI_CHUNK_IO; /*no opt */ + /* direct request to multi-chunk-io */ + else if(H5FD_MPIO_CHUNK_MULTI_IO == chunk_opt_mode) + io_option = H5D_MULTI_CHUNK_IO; + /* via default path. branch by num threshold */ else { unsigned one_link_chunk_io_threshold; /* Threshhold to use single collective I/O for all chunks */ int mpi_size; /* Number of processes in MPI job */ @@ -649,7 +654,7 @@ H5D__chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_inf /*** Test collective chunk user-input optimization APIs. ***/ check_prop = H5Pexist(io_info->dxpl_id, H5D_XFER_COLL_CHUNK_LINK_HARD_NAME); if(check_prop > 0) { - if(io_option == H5D_ONE_LINK_CHUNK_IO) { + if(H5D_ONE_LINK_CHUNK_IO == io_option) { new_value = 0; if(H5Pset(io_info->dxpl_id, H5D_XFER_COLL_CHUNK_LINK_HARD_NAME, &new_value) < 0) HGOTO_ERROR(H5E_IO, H5E_CANTSET, FAIL, "unable to set property value") @@ -657,7 +662,7 @@ H5D__chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_inf } /* end if */ check_prop = H5Pexist(io_info->dxpl_id, H5D_XFER_COLL_CHUNK_MULTI_HARD_NAME); if(check_prop > 0) { - if(io_option == H5D_MULTI_CHUNK_IO) { + if(H5D_MULTI_CHUNK_IO == io_option) { new_value = 0; if(H5Pset(io_info->dxpl_id, H5D_XFER_COLL_CHUNK_MULTI_HARD_NAME, &new_value) < 0) HGOTO_ERROR(H5E_IO, H5E_CANTSET, FAIL, "unable to set property value") @@ -665,7 +670,7 @@ H5D__chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_inf } /* end if */ check_prop = H5Pexist(io_info->dxpl_id, H5D_XFER_COLL_CHUNK_LINK_NUM_TRUE_NAME); if(check_prop > 0) { - if(io_option == H5D_ONE_LINK_CHUNK_IO_MORE_OPT) { + if(H5D_ONE_LINK_CHUNK_IO_MORE_OPT == io_option) { new_value = 0; if(H5Pset(io_info->dxpl_id, H5D_XFER_COLL_CHUNK_LINK_NUM_TRUE_NAME, &new_value) < 0) HGOTO_ERROR(H5E_IO, H5E_CANTSET, FAIL, "unable to set property value") @@ -682,39 +687,16 @@ H5D__chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_inf #endif /* step 2: Go ahead to do IO.*/ - if(io_option == H5D_ONE_LINK_CHUNK_IO || io_option == H5D_ONE_LINK_CHUNK_IO_MORE_OPT) { - /* set the actual io mode properties to the correct values for link chunk io. - * Link chunk I/O does not break to independent, so we can set the actual_io mode - * as well as the optimisation mode. */ - actual_chunk_opt_mode = H5D_MPIO_LINK_CHUNK; - actual_io_mode = H5D_MPIO_CHUNK_COLLECTIVE; - - /* Set the actual chunk opt mode property. */ - if(H5P_set(dx_plist, H5D_MPIO_ACTUAL_CHUNK_OPT_MODE_NAME, &actual_chunk_opt_mode) < 0) - HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set actual chunk opt mode property") - - if(H5D__link_chunk_collective_io(io_info, type_info, fm, sum_chunk) < 0) + if(H5D_ONE_LINK_CHUNK_IO == io_option || H5D_ONE_LINK_CHUNK_IO_MORE_OPT == io_option) { + if(H5D__link_chunk_collective_io(io_info, type_info, fm, sum_chunk, dx_plist) < 0) HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't finish linked chunk MPI-IO") - - /* Set the actual io mode property. */ - if(H5P_set(dx_plist, H5D_MPIO_ACTUAL_IO_MODE_NAME, &actual_io_mode) < 0) - HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set actual io mode property") } /* end if */ - else - if(io_option == H5D_MULTI_CHUNK_IO) { - /* Set the actual chunk opt mode property */ - actual_chunk_opt_mode = H5D_MPIO_MULTI_CHUNK_NO_OPT; - if(H5P_set(dx_plist, H5D_MPIO_ACTUAL_CHUNK_OPT_MODE_NAME, &actual_chunk_opt_mode) < 0) - HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set actual chunk opt mode property") - - if(H5D__multi_chunk_collective_io_no_opt(io_info, type_info, fm, dx_plist) < 0) - HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't finish multiple chunk MPI-IO") + /* direct request to multi-chunk-io */ + else if(H5D_MULTI_CHUNK_IO == io_option) { + if(H5D__multi_chunk_collective_io(io_info, type_info, fm, dx_plist) < 0) + HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't finish optimized multiple chunk MPI-IO") } /* end if */ - else { /*multiple chunk IOs with opt */ - actual_chunk_opt_mode = H5D_MPIO_MULTI_CHUNK; - if(H5P_set(dx_plist, H5D_MPIO_ACTUAL_CHUNK_OPT_MODE_NAME, &actual_chunk_opt_mode) < 0) - HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set actual chunk opt mode property") - + else { /* multiple chunk IO via threshold */ if(H5D__multi_chunk_collective_io(io_info, type_info, fm, dx_plist) < 0) HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't finish optimized multiple chunk MPI-IO") } /* end else */ @@ -801,11 +783,16 @@ done: * Programmer: Muqun Yang * Monday, Feb. 13th, 2006 * + * Modification: + * - Set H5D_MPIO_ACTUAL_CHUNK_OPT_MODE_NAME and H5D_MPIO_ACTUAL_IO_MODE_NAME + * dxpl in this. + * Programmer: Jonathan Kim + * Date: 2012-10-10 *------------------------------------------------------------------------- */ static herr_t H5D__link_chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_info, - H5D_chunk_map_t *fm, int sum_chunk) + H5D_chunk_map_t *fm, int sum_chunk, H5P_genplist_t *dx_plist) { H5D_chunk_addr_info_t *chunk_addr_info_array = NULL; MPI_Datatype chunk_final_mtype; /* Final memory MPI datatype for all chunks with seletion */ @@ -824,10 +811,21 @@ H5D__link_chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *typ int *chunk_mpi_file_counts = NULL; /* Count of MPI file datatype for each chunk */ int *chunk_mpi_mem_counts = NULL; /* Count of MPI memory datatype for each chunk */ int mpi_code; /* MPI return code */ + H5D_mpio_actual_chunk_opt_mode_t actual_chunk_opt_mode = H5D_MPIO_LINK_CHUNK; + H5D_mpio_actual_io_mode_t actual_io_mode = H5D_MPIO_CHUNK_COLLECTIVE; herr_t ret_value = SUCCEED; FUNC_ENTER_STATIC + /* Set the actual-chunk-opt-mode property. */ + if(H5P_set(dx_plist, H5D_MPIO_ACTUAL_CHUNK_OPT_MODE_NAME, &actual_chunk_opt_mode) < 0) + HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set actual chunk opt mode property") + + /* Set the actual-io-mode property. + * Link chunk I/O does not break to independent, so can set right away */ + if(H5P_set(dx_plist, H5D_MPIO_ACTUAL_IO_MODE_NAME, &actual_io_mode) < 0) + HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set actual io mode property") + /* Get the sum # of chunks, if not already available */ if(sum_chunk < 0) { if(H5D__mpio_get_sum_chunk(io_info, fm, &sum_chunk) < 0) @@ -1075,6 +1073,12 @@ if(H5DEBUG(D)) * Programmer: Muqun Yang * Monday, Feb. 13th, 2006 * + * Modification: + * - Set H5D_MPIO_ACTUAL_CHUNK_OPT_MODE_NAME dxpl in this to go along with + * setting H5D_MPIO_ACTUAL_IO_MODE_NAME dxpl at the bottom. + * Programmer: Jonathan Kim + * Date: 2012-10-10 + * *------------------------------------------------------------------------- */ static herr_t @@ -1096,11 +1100,16 @@ H5D__multi_chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *ty int mpi_rank; #endif size_t u; /* Local index variable */ + H5D_mpio_actual_chunk_opt_mode_t actual_chunk_opt_mode = H5D_MPIO_MULTI_CHUNK; /* actual chunk optimization mode */ H5D_mpio_actual_io_mode_t actual_io_mode = H5D_MPIO_NO_COLLECTIVE; /* Local variable for tracking the I/O mode used. */ herr_t ret_value = SUCCEED; FUNC_ENTER_STATIC + /* Set the actual chunk opt mode property */ + if(H5P_set(dx_plist, H5D_MPIO_ACTUAL_CHUNK_OPT_MODE_NAME, &actual_chunk_opt_mode) < 0) + HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set actual chunk opt mode property") + #ifdef H5Dmpio_DEBUG mpi_rank = H5F_mpi_get_rank(io_info->dset->oloc.file); #endif @@ -1263,210 +1272,6 @@ done: } /* end H5D__multi_chunk_collective_io */ -/*------------------------------------------------------------------------- - * Function: H5D__multi_chunk_collective_io_no_opt - * - * Purpose: To do collective IO without any optimization per chunk base - * The internal independent IO inside HDF5 cannot handle - * non-contiguous(or with holes) storage efficiently. - * Under this case, the one independent IO call may consist of - * many small disk IOs. So we may use independent IO with derived datatype - * to replace the independent IO when we find this chunk is not good to - * do collective IO. However, according to our performance study, - * this approach may not overcome the overhead caused by MPI gather/scatter. - * So we decide to leave the original collective IO per chunk approach as - * an option for users. NO MPI gather/scatter calls are used. - * HDF5 will try to collective IO if possible. - * If users choose to use - * H5Pset_dxpl_mpio_chunk_opt(dxpl_id,H5FD_MPIO_OPT_MULTI_IO), - * this function will be called. - * The HDF5 library won't do any IO management but leave it to MPI-IO to figure - * out. - * - * Return: Non-negative on success/Negative on failure - * - * Programmer: Muqun Yang - * Monday, Feb. 13th, 2006 - * - *------------------------------------------------------------------------- - */ -static herr_t -H5D__multi_chunk_collective_io_no_opt(H5D_io_info_t *io_info, - const H5D_type_info_t *type_info, H5D_chunk_map_t *fm, H5P_genplist_t *dx_plist) -{ - H5SL_node_t *chunk_node; /* Current node in chunk skip list */ - H5D_io_info_t ctg_io_info; /* Contiguous I/O info object */ - H5D_storage_t ctg_store; /* Chunk storage information as contiguous dataset */ - H5D_io_info_t cpt_io_info; /* Compact I/O info object */ - H5D_storage_t cpt_store; /* Chunk storage information as compact dataset */ - hbool_t cpt_dirty; /* Temporary placeholder for compact storage "dirty" flag */ - int min_chunk = -1; /* Minimum # of chunks all processes will operate on */ - int count_chunk; /* How many chunks have we operated on? */ - H5D_storage_t store; /* union of EFL and chunk pointer in file space */ - H5D_mpio_actual_io_mode_t actual_io_mode = H5D_MPIO_NO_COLLECTIVE; /*Local variable for tracking the I/O modes used. */ - herr_t ret_value = SUCCEED; - - FUNC_ENTER_STATIC - -#ifdef H5D_DEBUG -if(H5DEBUG(D)) { - int mpi_rank; - - mpi_rank = H5F_mpi_get_rank(io_info->dset->oloc.file); - HDfprintf(H5DEBUG(D), "Rank %d: coming to multi_chunk_collective_io_no_opt\n", mpi_rank); -} -#endif - - /* Set up contiguous I/O info object */ - HDmemcpy(&ctg_io_info, io_info, sizeof(ctg_io_info)); - ctg_io_info.store = &ctg_store; - ctg_io_info.layout_ops = *H5D_LOPS_CONTIG; - - /* Initialize temporary contiguous storage info */ - ctg_store.contig.dset_size = (hsize_t)io_info->dset->shared->layout.u.chunk.size; - - /* Set up compact I/O info object */ - HDmemcpy(&cpt_io_info, io_info, sizeof(cpt_io_info)); - cpt_io_info.store = &cpt_store; - cpt_io_info.layout_ops = *H5D_LOPS_COMPACT; - - /* Initialize temporary compact storage info */ - cpt_store.compact.dirty = &cpt_dirty; - - /* Set dataset storage for I/O info */ - io_info->store = &store; - - /* Get the min. # of chunks */ - if(H5D__mpio_get_min_chunk(io_info, fm, &min_chunk) < 0) - HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get minimum number of chunk") - HDassert(min_chunk >= 0); - - /* Get first node in chunk skip list */ - chunk_node = H5SL_first(fm->sel_chunks); - count_chunk = 0; - - /* Iterate through chunks to be operated on */ - while(chunk_node) { - H5D_chunk_info_t *chunk_info; /* chunk information */ - H5D_chunk_ud_t udata; /* B-tree pass-through */ - hbool_t make_ind, make_coll; /* Flags to indicate that the MPI mode should change */ - - /* Get the actual chunk information from the skip list node */ - chunk_info = H5SL_item(chunk_node); - - /* Pass in chunk's coordinates in a union. */ - store.chunk.offset = chunk_info->coords; - store.chunk.index = chunk_info->index; - - /* Reset flags for changing parallel I/O mode */ - make_ind = make_coll = FALSE; - - count_chunk++; - - /* If the number of chunk is greater than minimum number of chunk, - * Do independent read. - */ - if(count_chunk > min_chunk) - /* Switch to independent I/O (permanently) */ - make_ind = TRUE; - - /* Retrieve the chunk's address */ - if(H5D__chunk_lookup(io_info->dset, io_info->dxpl_id, chunk_info->coords, - chunk_info->index, &udata) < 0) - HGOTO_ERROR(H5E_STORAGE, H5E_CANTGET, FAIL, "couldn't get chunk info from skipped list") - - /* Independent I/O */ - if(make_ind) { - void *chunk; /* Pointer to the data chunk in cache */ - H5D_io_info_t *chk_io_info; /* Pointer to I/O info object for this chunk */ - uint32_t accessed_bytes = 0; /* Total accessed size in a chunk */ - htri_t cacheable; /* Whether the chunk is cacheable */ - - /* Switch to independent I/O */ - if(H5D__ioinfo_xfer_mode(io_info, dx_plist, H5FD_MPIO_INDEPENDENT) < 0) - HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't switch to independent I/O") - - /* Update the local variable tracking the dxpl's actual io mode */ - actual_io_mode = actual_io_mode | H5D_MPIO_CHUNK_INDEPENDENT; - - /* Load the chunk into cache and lock it. */ - if((cacheable = H5D__chunk_cacheable(io_info, udata.addr, - io_info->op_type == H5D_IO_OP_WRITE)) < 0) - HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't tell if chunk is cacheable") - if(cacheable) { - hbool_t entire_chunk = TRUE; /* Whether whole chunk is selected */ - - /* Compute # of bytes accessed in chunk */ - accessed_bytes = chunk_info->chunk_points * type_info->src_type_size; - - /* Determine if we will access all the data in the chunk */ - if(((io_info->op_type == H5D_IO_OP_WRITE) && (accessed_bytes != ctg_store.contig.dset_size)) - || (io_info->op_type != H5D_IO_OP_WRITE)) - entire_chunk = FALSE; - - /* Lock the chunk into the cache */ - if(NULL == (chunk = H5D__chunk_lock(io_info, &udata, entire_chunk))) - HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "unable to read raw data chunk") - - /* Set up the storage buffer information for this chunk */ - cpt_store.compact.buf = chunk; - - /* Point I/O info at contiguous I/O info for this chunk */ - chk_io_info = &cpt_io_info; - } /* end if */ - else { - /* Set up the storage address information for this chunk */ - ctg_store.contig.dset_addr = udata.addr; - - /* No chunk cached */ - chunk = NULL; - - /* Point I/O info at temporary I/O info for this chunk */ - chk_io_info = &ctg_io_info; - } /* end else */ - - if(io_info->op_type == H5D_IO_OP_WRITE) { - if((io_info->io_ops.single_write)(chk_io_info, type_info, - (hsize_t)chunk_info->chunk_points, chunk_info->fspace, chunk_info->mspace) < 0) - HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "optimized write failed") - } /* end if */ - else { - if((io_info->io_ops.single_read)(chk_io_info, type_info, - (hsize_t)chunk_info->chunk_points, chunk_info->fspace, chunk_info->mspace) < 0) - HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "optimized read failed") - } /* end ese */ - - /* Release the cache lock on the chunk. */ - if(chunk) - if(H5D__chunk_unlock(io_info, &udata, (io_info->op_type == H5D_IO_OP_WRITE), chunk, accessed_bytes) < 0) - HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "unable to unlock raw data chunk") - } /* end if */ - else { /*collective I/O */ - /* Set up the storage address information for this chunk */ - ctg_store.contig.dset_addr = udata.addr; - - /* Update the local variable tracking the dxpl's actual io Mode. */ - actual_io_mode = actual_io_mode | H5D_MPIO_CHUNK_COLLECTIVE; - - if(H5D__inter_collective_io(&ctg_io_info, type_info, chunk_info->fspace, chunk_info->mspace) < 0) - HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL,"couldn't finish shared collective MPI-IO") - } /* end else */ - - if(make_coll) - if(H5D__ioinfo_xfer_mode(io_info, dx_plist, H5FD_MPIO_COLLECTIVE) < 0) - HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't switch to independent I/O") - - /* Get the next chunk node in the skip list */ - chunk_node = H5SL_next(chunk_node); - } /* end while */ - - /* Write the local value of actual io mode to the DXPL. */ - if(H5P_set(dx_plist, H5D_MPIO_ACTUAL_IO_MODE_NAME, &actual_io_mode) < 0) - HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set actual io mode property") - -done: - FUNC_LEAVE_NOAPI(ret_value) -} /* end H5D__multi_chunk_collective_io_no_opt */ /*------------------------------------------------------------------------- @@ -1794,7 +1599,6 @@ H5D__obtain_mpio_mode(H5D_io_info_t* io_info, H5D_chunk_map_t *fm, { int total_chunks; unsigned percent_nproc_per_chunk, threshold_nproc_per_chunk; - H5FD_mpio_chunk_opt_t chunk_opt_mode; uint8_t* io_mode_info = NULL; uint8_t* recv_io_mode_info = NULL; uint8_t* mergebuf = NULL; @@ -1827,8 +1631,8 @@ H5D__obtain_mpio_mode(H5D_io_info_t* io_info, H5D_chunk_map_t *fm, /* Setup parameters */ H5_ASSIGN_OVERFLOW(total_chunks, fm->layout->u.chunk.nchunks, hsize_t, int); percent_nproc_per_chunk = H5P_peek_unsigned(dx_plist, H5D_XFER_MPIO_CHUNK_OPT_RATIO_NAME); - chunk_opt_mode = (H5FD_mpio_chunk_opt_t)H5P_peek_unsigned(dx_plist, H5D_XFER_MPIO_CHUNK_OPT_HARD_NAME); - if((chunk_opt_mode == H5FD_MPIO_CHUNK_MULTI_IO) || (percent_nproc_per_chunk == 0)) { + /* if ratio is 0, perform collective io */ + if(0 == percent_nproc_per_chunk) { if(H5D__chunk_addrmap(io_info, chunk_addr) < 0) HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get chunk address"); for(ic = 0; ic < total_chunks; ic++) |