diff options
Diffstat (limited to 'src/H5Fistore.c')
| -rw-r--r-- | src/H5Fistore.c | 65 |
1 files changed, 39 insertions, 26 deletions
diff --git a/src/H5Fistore.c b/src/H5Fistore.c index 1d7feeb..a0f7497 100644 --- a/src/H5Fistore.c +++ b/src/H5Fistore.c @@ -2411,6 +2411,10 @@ done: * Quincey Koziol, 2002-05-16 * Rewrote algorithm to allocate & write blocks without using * lock/unlock code. + * + * Quincey Koziol, 2002-05-17 + * Added feature to avoid writing fill-values if user has indicated + * that they should never be written. *------------------------------------------------------------------------- */ #ifdef H5_HAVE_PARALLEL @@ -2422,6 +2426,7 @@ H5F_istore_allocate(H5F_t *f, hid_t dxpl_id, const H5O_layout_t *layout, hsize_t chunk_size; /* Size of chunk in bytes */ H5O_pline_t pline; /* I/O pipeline information */ H5O_fill_t fill; /* Fill value information */ + H5D_fill_time_t fill_time; /* When to write fill values */ H5F_istore_ud1_t udata; /* B-tree pass-through for creating chunk */ void *chunk=NULL; /* Chunk buffer for writing fill values */ H5P_genplist_t *dx_plist; /* Data xfer property list */ @@ -2429,7 +2434,7 @@ H5F_istore_allocate(H5F_t *f, hid_t dxpl_id, const H5O_layout_t *layout, int mpi_rank; /* This process's rank */ int mpi_size; /* Total # of processes */ int mpi_round=0; /* Current process responsible for I/O */ - unsigned chunk_allocated=0; /* Flag to indicate that chunk was actually allocated */ + unsigned blocks_written=0; /* Flag to indicate that chunk was actually written */ int carry; /* Flag to indicate that chunk increment carrys to higher dimension (sorta) */ int i; /* Local index variable */ unsigned u; /* Local index variable */ @@ -2452,6 +2457,8 @@ H5F_istore_allocate(H5F_t *f, hid_t dxpl_id, const H5O_layout_t *layout, HGOTO_ERROR(H5E_STORAGE, H5E_CANTGET, FAIL, "can't get fill value"); if(H5P_get(dc_plist, H5D_CRT_DATA_PIPELINE_NAME, &pline) < 0) HGOTO_ERROR(H5E_STORAGE, H5E_CANTGET, FAIL, "can't get data pipeline"); + if(H5P_get(dc_plist, H5D_CRT_FILL_TIME_NAME, &fill_time) < 0) + HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't retrieve fill time"); /* Get necessary properties from dataset transfer property list */ if (TRUE!=H5P_isa_class(dxpl_id,H5P_DATASET_XFER) || NULL == (dx_plist = H5I_object(dxpl_id))) @@ -2472,23 +2479,26 @@ H5F_istore_allocate(H5F_t *f, hid_t dxpl_id, const H5O_layout_t *layout, chunk_size *= layout->dim[u]; } /* end for */ - /* Allocate chunk buffer for processes to use when writing fill values */ - if (NULL==(chunk = H5F_istore_chunk_alloc(chunk_size))) - HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for chunk"); + /* Check if fill values should be written to blocks */ + if(fill_time != H5D_FILL_TIME_NEVER) { + /* Allocate chunk buffer for processes to use when writing fill values */ + if (NULL==(chunk = H5F_istore_chunk_alloc(chunk_size))) + HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for chunk"); - /* Fill the chunk with the proper values */ - if(fill.buf) { - /* - * Replicate the fill value throughout the chunk. - */ - assert(0==chunk_size % fill.size); - H5V_array_fill(chunk, fill.buf, fill.size, chunk_size/fill.size); - } else { - /* - * No fill value was specified, assume all zeros. - */ - HDmemset (chunk, 0, chunk_size); - } /* end else */ + /* Fill the chunk with the proper values */ + if(fill.buf) { + /* + * Replicate the fill value throughout the chunk. + */ + assert(0==chunk_size % fill.size); + H5V_array_fill(chunk, fill.buf, fill.size, chunk_size/fill.size); + } else { + /* + * No fill value was specified, assume all zeros. + */ + HDmemset (chunk, 0, chunk_size); + } /* end else */ + } /* end if */ /* Retrieve up MPI parameters */ if ((mpi_rank=H5FD_mpio_mpi_rank(f->shared->lf))<0) @@ -2513,15 +2523,18 @@ H5F_istore_allocate(H5F_t *f, hid_t dxpl_id, const H5O_layout_t *layout, if (H5B_insert(f, H5B_ISTORE, layout->addr, split_ratios, &udata)<0) HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "unable to allocate chunk"); - /* Round-robin write the chunks out from only one process */ - if(mpi_round==mpi_rank) { - if (H5F_block_write(f, H5FD_MEM_DRAW, udata.addr, udata.key.nbytes, dxpl_id, chunk)<0) - HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "unable to write raw data to file"); + /* Check if fill values should be written to blocks */ + if(fill_time != H5D_FILL_TIME_NEVER) { + /* Round-robin write the chunks out from only one process */ + if(mpi_round==mpi_rank) { + if (H5F_block_write(f, H5FD_MEM_DRAW, udata.addr, udata.key.nbytes, dxpl_id, chunk)<0) + HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "unable to write raw data to file"); + } /* end if */ + mpi_round=(++mpi_round)%mpi_size; + + /* Indicate that blocks are being written */ + blocks_written=1; } /* end if */ - mpi_round=(++mpi_round)%mpi_size; - - /* Indicate that a chunk was allocated */ - chunk_allocated=1; } /* end if */ /* Increment indices */ @@ -2536,7 +2549,7 @@ H5F_istore_allocate(H5F_t *f, hid_t dxpl_id, const H5O_layout_t *layout, } /* end while */ /* Only need to block at the barrier if we actually allocated a chunk */ - if(chunk_allocated) { + if(blocks_written) { /* Wait at barrier to avoid race conditions where some processes are * still writing out chunks and other processes race ahead to read * them in, getting bogus data. |