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authorNeil Fortner <nfortne2@hdfgroup.org>2009-02-27 17:01:00 (GMT)
committerNeil Fortner <nfortne2@hdfgroup.org>2009-02-27 17:01:00 (GMT)
commitef425724f749705c76b43c17f8da5d2aa066cb00 (patch)
treef9e36f23d301725e5d447dcc970c15d3997d2632
parentd75cd486e1394f023f0cc5d8ddfec63f96b8763b (diff)
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[svn-r16523] Purpose: Fix bugs related to H5Dset_extent and fill values
Description: In some situations it was possible for the fill value to not be written to parts of a chunked dataset, particularly when extending and/or shrinking. Prior to the fix for the chunk cache (1015) these bugs would have been exceedingly rare. Tested: jam, smirom, linew (h5committest)
-rw-r--r--release_docs/RELEASE.txt2
-rw-r--r--src/H5Dchunk.c518
-rw-r--r--src/H5Dmpio.c18
-rw-r--r--src/H5Dpkg.h3
-rw-r--r--test/set_extent.c67
5 files changed, 362 insertions, 246 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 1476952..33dc13d 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -142,6 +142,8 @@ Bug Fixes since HDF5-1.8.0 release
Library
-------
+ - Fixed various bugs that could prevent the fill value from being written
+ in certain rare cases. (NAF - 2009/02/26)
- Fixed a bug that prevented more than one dataset chunk from being cached
at a time. (NAF - 2009/02/12)
- Fixed an assertion failure caused by opening an attribute multiple times
diff --git a/src/H5Dchunk.c b/src/H5Dchunk.c
index 87aed7b..bbe57a0 100644
--- a/src/H5Dchunk.c
+++ b/src/H5Dchunk.c
@@ -75,14 +75,21 @@
/* Local Typedefs */
/******************/
+/* Stack of chunks to remove during a "prune" iteration */
+typedef struct H5D_chunk_prune_stack_t {
+ H5D_chunk_rec_t rec; /* Chunk record */
+ struct H5D_chunk_prune_stack_t *next; /* Next chunk in stack */
+} H5D_chunk_prune_stack_t;
+
/* Callback info for iteration to prune chunks */
typedef struct H5D_chunk_it_ud1_t {
H5D_chunk_common_ud_t common; /* Common info for B-tree user data (must be first) */
const H5D_chk_idx_info_t *idx_info; /* Chunked index info */
const H5D_io_info_t *io_info; /* I/O info for dataset operation */
const hsize_t *dims; /* New dataset dimensions */
+ const hbool_t *shrunk_dims; /* Dimensions which have been shrunk */
const hsize_t *down_chunks; /* "down" size of number of chunks in each dimension */
- H5SL_t *outside; /* Skip list to hold chunks outside the new dimensions */
+ H5D_chunk_prune_stack_t *rm_stack; /* Stack of chunks outside the new dimensions */
H5S_t *chunk_space; /* Dataspace for a chunk */
uint32_t elmts_per_chunk;/* Elements in chunk */
hsize_t *hyper_start; /* Starting location of hyperslab */
@@ -90,18 +97,6 @@ typedef struct H5D_chunk_it_ud1_t {
hbool_t fb_info_init; /* Whether the fill value buffer has been initialized */
} H5D_chunk_it_ud1_t;
-/* Skip list node for storing chunks to remove during a "prune" iteration */
-typedef struct H5D_chunk_sl_ck_t {
- hsize_t index; /* Index of chunk to remove (must be first) */
- H5D_chunk_rec_t rec; /* Chunk record */
-} H5D_chunk_sl_ck_t;
-
-/* Skip list callback info when destroying list & removing chunks during "prune" */
-typedef struct H5D_chunk_sl_rm_t {
- const H5D_chk_idx_info_t *idx_info; /* I/O info for dataset operation */
- const H5O_layout_t *mesg; /* Layout message */
-} H5D_chunk_sl_rm_t;
-
/* Callback info for iteration to obtain chunk address and the index of the chunk for all chunks in the B-tree. */
typedef struct H5D_chunk_id_ud2_t {
/* down */
@@ -245,7 +240,7 @@ H5FL_DEFINE(H5D_chunk_info_t);
H5FL_BLK_DEFINE_STATIC(chunk);
/* Declare a free list to manage H5D_chunk_sl_ck_t objects */
-H5FL_DEFINE_STATIC(H5D_chunk_sl_ck_t);
+H5FL_DEFINE_STATIC(H5D_chunk_prune_stack_t);
@@ -1340,13 +1335,13 @@ done:
*
*-------------------------------------------------------------------------
*/
-hbool_t
-H5D_chunk_cacheable(const H5D_io_info_t *io_info)
+htri_t
+H5D_chunk_cacheable(const H5D_io_info_t *io_info, haddr_t caddr, hbool_t write_op)
{
const H5D_t *dataset = io_info->dset;
- hbool_t ret_value;
+ htri_t ret_value = FAIL;
- FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5D_chunk_cacheable)
+ FUNC_ENTER_NOAPI_NOINIT(H5D_chunk_cacheable)
HDassert(io_info);
HDassert(dataset);
@@ -1365,20 +1360,38 @@ H5D_chunk_cacheable(const H5D_io_info_t *io_info)
ret_value = FALSE;
else {
#endif /* H5_HAVE_PARALLEL */
- /* If the chunk is too large to keep in the cache and if the address
- * for the chunk has been defined, then don't load the chunk into the
+ /* If the chunk is too large to keep in the cache and if we don't
+ * need to write the fill value, then don't load the chunk into the
* cache, just write the data to it directly.
*/
H5_CHECK_OVERFLOW(dataset->shared->layout.u.chunk.size, uint32_t, size_t);
- if((size_t)dataset->shared->layout.u.chunk.size > dataset->shared->cache.chunk.nbytes_max)
- ret_value = FALSE;
- else
+ if((size_t)dataset->shared->layout.u.chunk.size > dataset->shared->cache.chunk.nbytes_max) {
+ if(write_op && !H5F_addr_defined(caddr)) {
+ const H5O_fill_t *fill = &(dataset->shared->dcpl_cache.fill); /* Fill value info */
+ H5D_fill_value_t fill_status; /* Fill value status */
+
+ /* Revtrieve the fill value status */
+ if(H5P_is_fill_value_defined(fill, &fill_status) < 0)
+ HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't tell if fill value defined")
+
+ /* If the fill value needs to be written then we will need
+ * to use the cache to write the fill value */
+ if(fill->fill_time == H5D_FILL_TIME_ALLOC ||
+ (fill->fill_time == H5D_FILL_TIME_IFSET
+ && fill_status == H5D_FILL_VALUE_USER_DEFINED))
+ ret_value = TRUE;
+ else
+ ret_value = FALSE;
+ } else
+ ret_value = FALSE;
+ } else
ret_value = TRUE;
#ifdef H5_HAVE_PARALLEL
} /* end else */
#endif /* H5_HAVE_PARALLEL */
} /* end else */
+done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_chunk_cacheable() */
@@ -1510,6 +1523,7 @@ H5D_chunk_read(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
H5D_io_info_t *chk_io_info; /* Pointer to I/O info object for this chunk */
void *chunk; /* Pointer to locked chunk buffer */
H5D_chunk_ud_t udata; /* B-tree pass-through */
+ htri_t cacheable; /* Whether the chunk is cacheable */
/* Get the actual chunk information from the skip list node */
chunk_info = H5D_CHUNK_GET_NODE_INFO(fm, chunk_node);
@@ -1522,7 +1536,9 @@ H5D_chunk_read(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
if(H5F_addr_defined(udata.addr) || H5D_chunk_in_cache(io_info->dset, chunk_info->coords, chunk_info->index)
|| !skip_missing_chunks) {
/* Load the chunk into cache and lock it. */
- if(H5D_chunk_cacheable(io_info)) {
+ if((cacheable = H5D_chunk_cacheable(io_info, udata.addr, FALSE)) < 0)
+ HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't tell if chunk is cacheable")
+ if(cacheable) {
/* Pass in chunk's coordinates in a union. */
io_info->store->chunk.offset = chunk_info->coords;
io_info->store->chunk.index = chunk_info->index;
@@ -1641,6 +1657,7 @@ H5D_chunk_write(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
H5D_io_info_t *chk_io_info; /* Pointer to I/O info object for this chunk */
void *chunk; /* Pointer to locked chunk buffer */
H5D_chunk_ud_t udata; /* B-tree pass-through */
+ htri_t cacheable; /* Whether the chunk is cacheable */
/* Get the actual chunk information from the skip list node */
chunk_info = H5D_CHUNK_GET_NODE_INFO(fm, chunk_node);
@@ -1649,7 +1666,9 @@ H5D_chunk_write(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
* simply allocate space instead of load the chunk. */
if(H5D_chunk_get_info(io_info->dset, io_info->dxpl_id, chunk_info->coords, &udata) < 0)
HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error looking up chunk address")
- if(H5D_chunk_cacheable(io_info)) {
+ if((cacheable = H5D_chunk_cacheable(io_info, udata.addr, TRUE)) < 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 */
/* Pass in chunk's coordinates in a union. */
@@ -3195,10 +3214,10 @@ done:
/*-------------------------------------------------------------------------
- * Function: H5D_chunk_prune_cb
+ * Function: H5D_chunk_prune_fill
*
- * Purpose: Search for chunks that are no longer inside the pruned
- * dataset's extent
+ * Purpose: Write the fill value to the parts of the chunk that are no
+ * longer part of the dataspace
*
* Return: Non-negative on success/Negative on failure
*
@@ -3207,201 +3226,186 @@ done:
*
*-------------------------------------------------------------------------
*/
-/* ARGSUSED */
-static int
-H5D_chunk_prune_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
+static herr_t
+H5D_chunk_prune_fill(const H5D_chunk_rec_t *chunk_rec, H5D_chunk_it_ud1_t *udata)
{
- H5D_chunk_it_ud1_t *udata = (H5D_chunk_it_ud1_t *)_udata; /* User data */
- H5D_chunk_sl_ck_t *sl_node = NULL; /* Skip list node for chunk to remove */
- unsigned rank; /* Current # of dimensions */
- hbool_t should_delete = FALSE; /* Whether the chunk should be deleted */
- hbool_t needs_fill = FALSE; /* Whether the chunk overlaps the new extent and needs fill valiues */
- unsigned u; /* Local index variable */
- int ret_value = H5_ITER_CONT; /* Return value */
-
- FUNC_ENTER_NOAPI_NOINIT(H5D_chunk_prune_cb)
-
- /* Figure out what chunks are no longer in use for the specified extent and release them */
- rank = udata->common.mesg->u.chunk.ndims - 1;
- for(u = 0; u < rank; u++)
- /* The chunk record points to a chunk of storage that contains the
- * beginning of the logical address space represented by UDATA.
- */
- if(chunk_rec->offset[u] >= udata->dims[u]) {
- /* Indicate that the chunk will be deleted */
- should_delete = TRUE;
-
- /* Break out of loop, we know the chunk is outside the current dimensions */
- break;
- } /* end if */
- /* Check for chunk that overlaps new extent and will need fill values */
- else if((chunk_rec->offset[u] + udata->common.mesg->u.chunk.dim[u]) > udata->dims[u])
- /* Indicate that the chunk needs filling */
- /* (but continue in loop, since it could be outside the extent in
- * another dimension -QAK)
- */
- needs_fill = TRUE;
-
- /* Check for chunk to delete */
- if(should_delete) {
- /* Allocate space for the shared structure */
- if(NULL == (sl_node = H5FL_MALLOC(H5D_chunk_sl_ck_t)))
- HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, H5_ITER_ERROR, "memory allocation failed for shared B-tree info")
-
- /* Calculate the index of this chunk */
- if(H5V_chunk_index(rank, chunk_rec->offset, udata->common.mesg->u.chunk.dim, udata->down_chunks, &sl_node->index) < 0)
- HGOTO_ERROR(H5E_IO, H5E_BADRANGE, H5_ITER_ERROR, "can't get chunk index")
+ const H5D_io_info_t *io_info = udata->io_info; /* Local pointer to I/O info */
+ H5D_t *dset = io_info->dset; /* Local pointer to the dataset info */
+ const H5O_layout_t *layout = &(dset->shared->layout); /* Dataset's layout */
+ unsigned rank = udata->common.mesg->u.chunk.ndims - 1; /* Dataset rank */
+ H5S_sel_iter_t chunk_iter; /* Memory selection iteration info */
+ hssize_t sel_nelmts; /* Number of elements in selection */
+ hsize_t count[H5O_LAYOUT_NDIMS]; /* Element count of hyperslab */
+ void *chunk; /* The file chunk */
+ unsigned idx_hint; /* Which chunk we're dealing with */
+ H5D_chunk_ud_t chk_udata; /* User data for locking chunk */
+ uint32_t bytes_accessed; /* Bytes accessed in chunk */
+ unsigned u; /* Local index variable */
+ herr_t ret_value = SUCCEED; /* Return value */
- /* Store the key for the chunk */
- sl_node->rec = *chunk_rec;
+ FUNC_ENTER_NOAPI_NOINIT(H5D_chunk_prune_fill)
- /* Insert the chunk description in the skip list */
- if(H5SL_insert(udata->outside, sl_node, &sl_node->index) < 0)
- HGOTO_ERROR(H5E_IO, H5E_CANTINSERT, H5_ITER_ERROR, "can't insert chunk into skip list")
+ /* Initialize the fill value buffer, if necessary */
+ if(!udata->fb_info_init) {
+ H5_CHECK_OVERFLOW(udata->elmts_per_chunk, uint32_t, size_t);
+ if(H5D_fill_init(&udata->fb_info, NULL, FALSE, NULL, NULL, NULL, NULL,
+ &dset->shared->dcpl_cache.fill,
+ dset->shared->type, dset->shared->type_id, (size_t)udata->elmts_per_chunk,
+ io_info->dxpl_cache->max_temp_buf, io_info->dxpl_id) < 0)
+ HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't initialize fill buffer info")
+ udata->fb_info_init = TRUE;
} /* end if */
- /* Check for chunk that overlaps the new dataset dimensions and needs filling */
- else if(needs_fill) {
- const H5D_io_info_t *io_info = udata->io_info; /* Local pointer to I/O info */
- H5D_t *dset = io_info->dset; /* Local pointer to the dataset info */
- const H5O_layout_t *layout = &(dset->shared->layout); /* Dataset's layout */
- H5S_sel_iter_t chunk_iter; /* Memory selection iteration info */
- hssize_t sel_nelmts; /* Number of elements in selection */
- hsize_t count[H5O_LAYOUT_NDIMS]; /* Element count of hyperslab */
- void *chunk; /* The file chunk */
- unsigned idx_hint; /* Which chunk we're dealing with */
- H5D_chunk_ud_t chk_udata; /* User data for locking chunk */
- uint32_t bytes_accessed; /* Bytes accessed in chunk */
-
- /* Initialize the fill value buffer, if necessary */
- if(!udata->fb_info_init) {
- H5_CHECK_OVERFLOW(udata->elmts_per_chunk, uint32_t, size_t);
- if(H5D_fill_init(&udata->fb_info, NULL, FALSE, NULL, NULL, NULL, NULL,
- &dset->shared->dcpl_cache.fill,
- dset->shared->type, dset->shared->type_id, (size_t)udata->elmts_per_chunk,
- io_info->dxpl_cache->max_temp_buf, io_info->dxpl_id) < 0)
- HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, H5_ITER_ERROR, "can't initialize fill buffer info")
- udata->fb_info_init = TRUE;
- } /* end if */
- /* Compute the # of elements to leave with existing value, in each dimension */
- for(u = 0; u < rank; u++) {
- count[u] = MIN(layout->u.chunk.dim[u], (udata->dims[u] - chunk_rec->offset[u]));
- HDassert(count[u] > 0);
- } /* end for */
+ /* Compute the # of elements to leave with existing value, in each dimension */
+ for(u = 0; u < rank; u++) {
+ count[u] = MIN(layout->u.chunk.dim[u], (udata->dims[u] - chunk_rec->offset[u]));
+ HDassert(count[u] > 0);
+ } /* end for */
- /* Select all elements in chunk, to begin with */
- if(H5S_select_all(udata->chunk_space, TRUE) < 0)
- HGOTO_ERROR(H5E_DATASET, H5E_CANTSELECT, H5_ITER_ERROR, "unable to select space")
+ /* Select all elements in chunk, to begin with */
+ if(H5S_select_all(udata->chunk_space, TRUE) < 0)
+ HGOTO_ERROR(H5E_DATASET, H5E_CANTSELECT, FAIL, "unable to select space")
- /* "Subtract out" the elements to keep */
- if(H5S_select_hyperslab(udata->chunk_space, H5S_SELECT_NOTB, udata->hyper_start, NULL, count, NULL) < 0)
- HGOTO_ERROR(H5E_DATASET, H5E_CANTSELECT, H5_ITER_ERROR, "unable to select hyperslab")
+ /* "Subtract out" the elements to keep */
+ if(H5S_select_hyperslab(udata->chunk_space, H5S_SELECT_NOTB, udata->hyper_start, NULL, count, NULL) < 0)
+ HGOTO_ERROR(H5E_DATASET, H5E_CANTSELECT, FAIL, "unable to select hyperslab")
- /* Calculate the index of this chunk */
- if(H5V_chunk_index(rank, chunk_rec->offset, layout->u.chunk.dim, udata->down_chunks, &io_info->store->chunk.index) < 0)
- HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, H5_ITER_ERROR, "can't get chunk index")
+ /* Calculate the index of this chunk */
+ if(H5V_chunk_index(rank, chunk_rec->offset, layout->u.chunk.dim, udata->down_chunks,
+ &io_info->store->chunk.index) < 0)
+ HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, H5_ITER_ERROR, "can't get chunk index")
- /* Lock the chunk into the cache, to get a pointer to the chunk buffer */
- /* (Casting away const OK -QAK) */
- io_info->store->chunk.offset = (hsize_t *)chunk_rec->offset;
- chk_udata.common.mesg = layout;
- chk_udata.common.offset = chunk_rec->offset;
- chk_udata.nbytes = chunk_rec->nbytes;
- chk_udata.filter_mask = chunk_rec->filter_mask;
- chk_udata.addr = chunk_rec->chunk_addr;
- if(NULL == (chunk = (void *)H5D_chunk_lock(udata->io_info, &chk_udata, FALSE, &idx_hint)))
- HGOTO_ERROR(H5E_DATASET, H5E_READERROR, H5_ITER_ERROR, "unable to lock raw data chunk")
-
-
- /* Fill the selection in the memory buffer */
- /* Use the size of the elements in the chunk directly instead of */
- /* relying on the fill.size, which might be set to 0 if there is */
- /* no fill-value defined for the dataset -QAK */
-
- /* Get the number of elements in the selection */
- sel_nelmts = H5S_GET_SELECT_NPOINTS(udata->chunk_space);
- HDassert(sel_nelmts >= 0);
- H5_CHECK_OVERFLOW(sel_nelmts, hssize_t, size_t);
-
- /* Check for VL datatype & non-default fill value */
- if(udata->fb_info.has_vlen_fill_type)
- /* Re-fill the buffer to use for this I/O operation */
- if(H5D_fill_refill_vl(&udata->fb_info, (size_t)sel_nelmts, io_info->dxpl_id) < 0)
- HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, H5_ITER_ERROR, "can't refill fill value buffer")
-
- /* Create a selection iterator for scattering the elements to memory buffer */
- if(H5S_select_iter_init(&chunk_iter, udata->chunk_space, layout->u.chunk.dim[rank]) < 0)
- HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, H5_ITER_ERROR, "unable to initialize chunk selection information")
-
- /* Scatter the data into memory */
- if(H5D_scatter_mem(udata->fb_info.fill_buf, udata->chunk_space, &chunk_iter, (size_t)sel_nelmts, io_info->dxpl_cache, chunk/*out*/) < 0) {
- H5S_SELECT_ITER_RELEASE(&chunk_iter);
- HGOTO_ERROR(H5E_DATASET, H5E_READERROR, H5_ITER_ERROR, "scatter failed")
- } /* end if */
+ /* Lock the chunk into the cache, to get a pointer to the chunk buffer */
+ /* (Casting away const OK -QAK) */
+ io_info->store->chunk.offset = (hsize_t *)chunk_rec->offset;
+ chk_udata.common.mesg = layout;
+ chk_udata.common.offset = chunk_rec->offset;
+ chk_udata.nbytes = chunk_rec->nbytes;
+ chk_udata.filter_mask = chunk_rec->filter_mask;
+ chk_udata.addr = chunk_rec->chunk_addr;
+ if(NULL == (chunk = (void *)H5D_chunk_lock(udata->io_info, &chk_udata, FALSE, &idx_hint)))
+ HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "unable to lock raw data chunk")
+
+
+ /* Fill the selection in the memory buffer */
+ /* Use the size of the elements in the chunk directly instead of */
+ /* relying on the fill.size, which might be set to 0 if there is */
+ /* no fill-value defined for the dataset -QAK */
+
+ /* Get the number of elements in the selection */
+ sel_nelmts = H5S_GET_SELECT_NPOINTS(udata->chunk_space);
+ HDassert(sel_nelmts >= 0);
+ H5_CHECK_OVERFLOW(sel_nelmts, hssize_t, size_t);
+
+ /* Check for VL datatype & non-default fill value */
+ if(udata->fb_info.has_vlen_fill_type)
+ /* Re-fill the buffer to use for this I/O operation */
+ if(H5D_fill_refill_vl(&udata->fb_info, (size_t)sel_nelmts, io_info->dxpl_id) < 0)
+ HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "can't refill fill value buffer")
+
+ /* Create a selection iterator for scattering the elements to memory buffer */
+ if(H5S_select_iter_init(&chunk_iter, udata->chunk_space, layout->u.chunk.dim[rank]) < 0)
+ HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize chunk selection information")
+
+ /* Scatter the data into memory */
+ if(H5D_scatter_mem(udata->fb_info.fill_buf, udata->chunk_space, &chunk_iter, (size_t)sel_nelmts, io_info->dxpl_cache, chunk/*out*/) < 0) {
+ H5S_SELECT_ITER_RELEASE(&chunk_iter);
+ HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "scatter failed")
+ } /* end if */
- /* Release the selection iterator */
- if(H5S_SELECT_ITER_RELEASE(&chunk_iter) < 0)
- HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, H5_ITER_ERROR, "Can't release selection iterator")
+ /* Release the selection iterator */
+ if(H5S_SELECT_ITER_RELEASE(&chunk_iter) < 0)
+ HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "Can't release selection iterator")
- /* The number of bytes accessed in the chunk */
- /* (i.e. the bytes replaced with fill values) */
- H5_CHECK_OVERFLOW(sel_nelmts, hssize_t, uint32_t);
- bytes_accessed = (uint32_t)sel_nelmts * layout->u.chunk.dim[rank];
+ /* The number of bytes accessed in the chunk */
+ /* (i.e. the bytes replaced with fill values) */
+ H5_CHECK_OVERFLOW(sel_nelmts, hssize_t, uint32_t);
+ bytes_accessed = (uint32_t)sel_nelmts * layout->u.chunk.dim[rank];
- /* Release lock on chunk */
- if(H5D_chunk_unlock(io_info, TRUE, idx_hint, chunk, bytes_accessed) < 0)
- HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, H5_ITER_ERROR, "unable to unlock raw data chunk")
- } /* end else-if */
+ /* Release lock on chunk */
+ if(H5D_chunk_unlock(io_info, TRUE, idx_hint, chunk, bytes_accessed) < 0)
+ HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "unable to unlock raw data chunk")
done:
- if(ret_value != H5_ITER_CONT && sl_node)
- (void)H5FL_FREE(H5D_chunk_sl_ck_t, sl_node);
-
FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5D_chunk_prune_cb() */
+} /* H5D_chunk_prune_fill */
/*-------------------------------------------------------------------------
- * Function: H5D_chunk_prune_sl_rm_cb
+ * Function: H5D_chunk_prune_cb
*
- * Purpose: Destroy a skip list node for "pruning" chunks, also removes
- * the chunk from the index.
+ * Purpose: Search for chunks that are no longer inside the pruned
+ * dataset's extent
*
* Return: Non-negative on success/Negative on failure
*
- * Programmer: Quincey Koziol, koziol@hdfgroup.org
- * May 3, 2007
+ * Programmer: Pedro Vicente, pvn@ncsa.uiuc.edu
+ * March 26, 2002
*
*-------------------------------------------------------------------------
*/
-static herr_t
-H5D_chunk_prune_sl_rm_cb(void *item, void UNUSED *key, void *op_data)
+/* ARGSUSED */
+static int
+H5D_chunk_prune_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
{
- H5D_chunk_sl_ck_t *sl_node = (H5D_chunk_sl_ck_t *)item; /* Temporary pointer to chunk to remove */
- H5D_chunk_sl_rm_t *rm_info = (H5D_chunk_sl_rm_t *)op_data; /* Information needed for removing chunk from B-tree */
- H5D_chunk_common_ud_t idx_udata; /* User data for index removal routine */
- herr_t ret_value = H5_ITER_CONT; /* Return value */
+ H5D_chunk_it_ud1_t *udata = (H5D_chunk_it_ud1_t *)_udata; /* User data */
+ H5D_chunk_prune_stack_t *stack_node = NULL; /* Stack node for chunk to remove */
+ unsigned rank; /* Current # of dimensions */
+ hbool_t should_delete = FALSE; /* Whether the chunk should be deleted */
+ hbool_t needs_fill = FALSE; /* Whether the chunk overlaps the new extent and needs fill valiues */
+ unsigned u; /* Local index variable */
+ int ret_value = H5_ITER_CONT; /* Return value */
- FUNC_ENTER_NOAPI_NOINIT(H5D_chunk_prune_sl_rm_cb)
+ FUNC_ENTER_NOAPI_NOINIT(H5D_chunk_prune_cb)
- /* Sanity checks */
- HDassert(sl_node);
- HDassert(rm_info);
+ /* Figure out what chunks are no longer in use for the specified extent and release them */
+ rank = udata->common.mesg->u.chunk.ndims - 1;
+ for(u = 0; u < rank; u++)
+ /* The chunk record points to a chunk of storage that contains the
+ * beginning of the logical address space represented by UDATA.
+ */
+ if(udata->shrunk_dims[u]) {
+ if(chunk_rec->offset[u] >= udata->dims[u]) {
+ /* Indicate that the chunk will be deleted */
+ should_delete = TRUE;
- /* Initialize the user data for the index callback */
- idx_udata.mesg = rm_info->mesg;
- idx_udata.offset = sl_node->rec.offset;
+ /* Break out of loop, we know the chunk is outside the current dimensions */
+ break;
+ } /* end if */
+ /* Check for chunk that overlaps new extent and will need fill values */
+ else if((chunk_rec->offset[u] + udata->common.mesg->u.chunk.dim[u]) > udata->dims[u])
+ /* Indicate that the chunk needs filling */
+ /* (but continue in loop, since it could be outside the extent in
+ * another dimension -QAK)
+ */
+ needs_fill = TRUE;
+ } /* end if */
- /* Remove */
- if((rm_info->idx_info->layout->u.chunk.ops->remove)(rm_info->idx_info, &idx_udata) < 0)
- HGOTO_ERROR(H5E_DATASET, H5E_CANTDELETE, H5_ITER_ERROR, "unable to remove chunk entry from index")
+ /* Check for chunk to delete */
+ if(should_delete) {
+ /* Allocate space for the removal stack node */
+ if(NULL == (stack_node = H5FL_MALLOC(H5D_chunk_prune_stack_t)))
+ HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, H5_ITER_ERROR, "memory allocation failed for removal stack node")
-done:
- (void)H5FL_FREE(H5D_chunk_sl_ck_t, sl_node);
+ /* Store the record for the chunk */
+ stack_node->rec = *chunk_rec;
+ /* Push the chunk description onto the stack */
+ stack_node->next = udata->rm_stack;
+ udata->rm_stack = stack_node;
+ } /* end if */
+ /* Check for chunk that overlaps the new dataset dimensions and needs filling */
+ else if(needs_fill)
+ /* Write the fill value */
+ if(H5D_chunk_prune_fill(chunk_rec, udata) < 0)
+ HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, H5_ITER_ERROR, "unable to write fill value")
+
+done:
+ /* It is currently impossible to fail after the stack node has been
+ * malloc'ed. No need to free it here on failure. */
FUNC_LEAVE_NOAPI(ret_value)
-} /* H5D_chunk_prune_sl_rm_cb() */
+} /* end H5D_chunk_prune_cb() */
/*-------------------------------------------------------------------------
@@ -3515,9 +3519,13 @@ H5D_chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id, const hsize_t *old_dims)
const H5D_rdcc_t *rdcc = &(dset->shared->cache.chunk); /*raw data chunk cache */
H5D_rdcc_ent_t *ent = NULL, *next = NULL; /* Cache entries */
hsize_t curr_dims[H5O_LAYOUT_NDIMS]; /* Current dataspace dimensions */
+ hbool_t shrunk_dims[H5O_LAYOUT_NDIMS]; /* Dimensions which have shrunk */
H5D_chunk_it_ud1_t udata; /* Chunk index iterator user data */
hbool_t udata_init = FALSE; /* Whether the chunk index iterator user data has been initialized */
- H5D_chunk_sl_rm_t rm_info; /* User data for skip list destroy callback */
+ hbool_t needs_fill; /* Whether we need to write the fill value */
+ H5D_chunk_prune_stack_t *fill_stack = NULL; /* Stack of chunks to fill */
+ H5D_chunk_prune_stack_t *tmp_stack; /* Temporary stack node pointer */
+ H5D_chunk_common_ud_t idx_udata; /* User data for index removal routine */
H5S_t *chunk_space = NULL; /* Dataspace for a chunk */
hsize_t chunk_dims[H5O_LAYOUT_NDIMS]; /* Chunk dimensions */
hsize_t chunks[H5O_LAYOUT_NDIMS]; /* Current number of chunks in each dimension */
@@ -3535,6 +3543,10 @@ H5D_chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id, const hsize_t *old_dims)
HDassert(layout->u.chunk.ndims > 0 && layout->u.chunk.ndims <= H5O_LAYOUT_NDIMS);
HDassert(dxpl_cache);
+ /* set the removal stack pointer in udata to NULL, so if the function fails
+ * early it will not try to free the nonexistent stack */
+ udata.rm_stack = NULL;
+
/* Fill the DXPL cache values for later use */
if(H5D_get_dxpl_cache(dxpl_id, &dxpl_cache) < 0)
HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't fill dxpl cache")
@@ -3545,35 +3557,17 @@ H5D_chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id, const hsize_t *old_dims)
HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get dataset dimensions")
curr_dims[rank] = layout->u.chunk.dim[rank];
- /*-------------------------------------------------------------------------
- * Figure out what chunks are no longer in use for the specified extent
- * and release them from the linked list raw data cache
- *-------------------------------------------------------------------------
- */
- for(ent = rdcc->head; ent; ent = next) {
- /* Get pointer to next extry in cache, in case this one is evicted */
- next = ent->next;
-
- /* Check for chunk offset outside of new dimensions */
- for(u = 0; u < rank; u++)
- if((hsize_t)ent->offset[u] >= curr_dims[u]) {
- /* Evict the entry from the cache, but do not flush it to disk */
- if(H5D_chunk_cache_evict(dset, dxpl_id, dxpl_cache, ent, FALSE) < 0)
- HGOTO_ERROR(H5E_DATASET, H5E_CANTREMOVE, FAIL, "unable to evict chunk")
-
- /* Break out of loop, chunk is evicted */
- break;
- } /* end if */
- } /* end for */
-
/* Round up to the next integer # of chunks, to accomodate partial chunks */
+ /* Use current dims because the indices have already been updated! -NAF */
/* (also compute the number of elements per chunk) */
/* (also copy the chunk dimensions into 'hsize_t' array for creating dataspace) */
+ /* (also compute the dimensions which have been shrunk) */
elmts_per_chunk = 1;
for(u = 0; u < rank; u++) {
- chunks[u] = ((old_dims[u] + layout->u.chunk.dim[u]) - 1) / layout->u.chunk.dim[u];
+ chunks[u] = ((curr_dims[u] + layout->u.chunk.dim[u]) - 1) / layout->u.chunk.dim[u];
elmts_per_chunk *= layout->u.chunk.dim[u];
chunk_dims[u] = layout->u.chunk.dim[u];
+ shrunk_dims[u] = curr_dims[u] < old_dims[u];
} /* end for */
/* Get the "down" sizes for each dimension */
@@ -3603,26 +3597,90 @@ H5D_chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id, const hsize_t *old_dims)
udata.io_info = &chk_io_info;
udata.idx_info = &idx_info;
udata.dims = curr_dims;
+ udata.shrunk_dims = shrunk_dims;
udata.down_chunks = down_chunks;
udata.elmts_per_chunk = elmts_per_chunk;
udata.chunk_space = chunk_space;
udata.hyper_start = hyper_start;
udata_init = TRUE;
- /* Initialize the skip list that will hold the chunks outside the dimensions */
- if(NULL == (udata.outside = H5SL_create(H5SL_TYPE_HSIZE, 0.5, (size_t)H5D_CHUNK_DEFAULT_SKIPLIST_HEIGHT)))
- HGOTO_ERROR(H5E_IO, H5E_CANTCREATE, FAIL, "can't create skip list for chunks outside new dimensions")
+ /*-------------------------------------------------------------------------
+ * Figure out what chunks are no longer in use for the specified extent
+ * and release them from the linked list raw data cache
+ *-------------------------------------------------------------------------
+ */
+ for(ent = rdcc->head; ent; ent = next) {
+ /* Get pointer to next extry in cache, in case this one is evicted */
+ next = ent->next;
+
+ needs_fill = FALSE;
+
+ /* Check for chunk offset outside of new dimensions */
+ for(u = 0; u < rank; u++) {
+ if((hsize_t)ent->offset[u] >= curr_dims[u]) {
+ /* Evict the entry from the cache, but do not flush it to disk */
+ if(H5D_chunk_cache_evict(dset, dxpl_id, dxpl_cache, ent, FALSE) < 0)
+ HGOTO_ERROR(H5E_DATASET, H5E_CANTREMOVE, FAIL, "unable to evict chunk")
+
+ /* We don't need to write the fill value */
+ needs_fill = FALSE;
+
+ /* Break out of loop, chunk is evicted */
+ break;
+ } else if(!H5F_addr_defined(ent->chunk_addr) && shrunk_dims[u]
+ && (ent->offset[u] + chunk_dims[u]) > curr_dims[u])
+ /* We need to write the fill value to the unused parts of chunk */
+ needs_fill = TRUE;
+ } /* end for */
+
+ if(needs_fill) {
+ /* Allocate space for the stack node */
+ if(NULL == (tmp_stack = H5FL_MALLOC(H5D_chunk_prune_stack_t)))
+ HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, H5_ITER_ERROR, "memory allocation failed for stack node")
+
+ /* Set up chunk record for fill routine */
+ tmp_stack->rec.nbytes = ent->chunk_size;
+ HDmemcpy(tmp_stack->rec.offset, ent->offset, sizeof(tmp_stack->rec.offset));
+ tmp_stack->rec.filter_mask = 0; /* Since the chunk is already in cache this doesn't matter */
+ tmp_stack->rec.chunk_addr = ent->chunk_addr;
+
+ /* Push the chunk description onto the stack */
+ tmp_stack->next = fill_stack;
+ fill_stack = tmp_stack;
+ } /* end if */
+ } /* end for */
+
+ /* Traverse the stack of chunks to be filled, filling each. We will free
+ * the nodes later in the "done" section. */
+ tmp_stack = fill_stack;
+ while(tmp_stack) {
+ /* Write the fill value */
+ if(H5D_chunk_prune_fill(&(tmp_stack->rec), &udata) < 0)
+ HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, H5_ITER_ERROR, "unable to write fill value")
+
+ /* Advance the stack pointer */
+ tmp_stack = tmp_stack->next;
+ } /* end while */
/* Iterate over the chunks */
if((dset->shared->layout.u.chunk.ops->iterate)(&idx_info, H5D_chunk_prune_cb, &udata) < 0)
HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "unable to retrieve prune chunks from index")
- /* Set up user data for skip list callback */
- rm_info.idx_info = &idx_info;
- rm_info.mesg = layout;
+ /* Traverse the stack of chunks to be deleted, removing each. We will free
+ * the nodes later in the "done" section. */
+ idx_udata.mesg = layout;
+ tmp_stack = udata.rm_stack;
+ while(tmp_stack) {
+ /* Update the offset in idx_udata */
+ idx_udata.offset = tmp_stack->rec.offset;
- /* Destroy the skip list, deleting the chunks in the callback */
- H5SL_destroy(udata.outside, H5D_chunk_prune_sl_rm_cb, &rm_info);
+ /* Remove the chunk from disk */
+ if((layout->u.chunk.ops->remove)(&idx_info, &idx_udata) < 0)
+ HGOTO_ERROR(H5E_DATASET, H5E_CANTDELETE, H5_ITER_ERROR, "unable to remove chunk entry from index")
+
+ /* Advance the stack pointer */
+ tmp_stack = tmp_stack->next;
+ } /* end while */
/* Reset any cached chunk info for this dataset */
H5D_chunk_cinfo_cache_reset(&dset->shared->cache.chunk.last);
@@ -3636,6 +3694,24 @@ done:
HDONE_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "Can't release fill buffer info")
} /* end if */
+ /* Free stack of filled chunks */
+ tmp_stack = fill_stack;
+ while(tmp_stack) {
+ /* Free the stack node and advance the stack pointer */
+ tmp_stack = tmp_stack->next;
+ (void)H5FL_FREE(H5D_chunk_prune_stack_t, fill_stack);
+ fill_stack = tmp_stack;
+ } /* end while */
+
+ /* Free stack of removed chunks */
+ tmp_stack = udata.rm_stack;
+ while(tmp_stack) {
+ /* Free the stack node and advance the stack pointer */
+ tmp_stack = tmp_stack->next;
+ (void)H5FL_FREE(H5D_chunk_prune_stack_t, udata.rm_stack);
+ udata.rm_stack = tmp_stack;
+ } /* end while */
+
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_chunk_prune_by_extent() */
@@ -4563,7 +4639,7 @@ H5D_nonexistent_readvv(const H5D_io_info_t *io_info,
size = mem_len_arr[u];
/* Compute offset in memory */
- buf = (unsigned char *)io_info->u.rbuf + mem_offset_arr[v];
+ buf = (unsigned char *)io_info->u.rbuf + mem_offset_arr[u];
/* Initialize the fill value buffer */
if(H5D_fill_init(&fb_info, buf, FALSE,
diff --git a/src/H5Dmpio.c b/src/H5Dmpio.c
index 19be413..8757ba7 100644
--- a/src/H5Dmpio.c
+++ b/src/H5Dmpio.c
@@ -1209,6 +1209,7 @@ if(H5DEBUG(D))
void *chunk; /* Pointer to the data chunk in cache */
uint32_t accessed_bytes; /* Total accessed size in a chunk */
unsigned idx_hint = 0; /* Cache index hint */
+ htri_t cacheable; /* Whether the chunk is cacheable */
/* Switch to independent I/O */
if(last_xfer_mode != H5FD_MPIO_INDEPENDENT) {
@@ -1224,7 +1225,10 @@ if(H5DEBUG(D))
HGOTO_ERROR(H5E_STORAGE, H5E_CANTGET, FAIL, "couldn't get chunk info from skipped list")
/* Load the chunk into cache and lock it. */
- if(H5D_chunk_cacheable(io_info)) {
+ 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 */
@@ -1439,17 +1443,21 @@ if(H5DEBUG(D)) {
/* Independent I/O */
if(make_ind) {
- void *chunk; /* Pointer to the data chunk in cache */
+ 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 */
- unsigned idx_hint = 0; /* Cache index hint */
+ uint32_t accessed_bytes = 0; /* Total accessed size in a chunk */
+ unsigned idx_hint = 0; /* Cache index hint */
+ 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")
/* Load the chunk into cache and lock it. */
- if(H5D_chunk_cacheable(io_info)) {
+ 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 */
diff --git a/src/H5Dpkg.h b/src/H5Dpkg.h
index 3aa425b..7c94906 100644
--- a/src/H5Dpkg.h
+++ b/src/H5Dpkg.h
@@ -572,7 +572,8 @@ H5_DLL herr_t H5D_contig_copy(H5F_t *f_src, const H5O_layout_t *layout_src, H5F_
H5O_layout_t *layout_dst, H5T_t *src_dtype, H5O_copy_t *cpy_info, hid_t dxpl_id);
/* Functions that operate on chunked dataset storage */
-H5_DLL hbool_t H5D_chunk_cacheable(const H5D_io_info_t *io_info);
+H5_DLL htri_t H5D_chunk_cacheable(const H5D_io_info_t *io_info, haddr_t caddr,
+ hbool_t write_op);
H5_DLL herr_t H5D_chunk_cinfo_cache_reset(H5D_chunk_cached_t *last);
H5_DLL herr_t H5D_chunk_create(H5D_t *dset /*in,out*/, hid_t dxpl_id);
H5_DLL herr_t H5D_chunk_init(H5F_t *f, hid_t dapl_id, hid_t dxpl_id, const H5D_t *dset);
diff --git a/test/set_extent.c b/test/set_extent.c
index 1b6918a..b4e61b4 100644
--- a/test/set_extent.c
+++ b/test/set_extent.c
@@ -46,12 +46,12 @@ const char *FILENAME[] = {
#define RANK1 1
#define RANK2 2
#define RANK3 3
-#define DIM0 4
-#define DIM1 4
-#define DIM2 4
-#define DIMS0 2
-#define DIMS1 2
-#define DIMS2 2
+#define DIM0 5
+#define DIM1 5
+#define DIM2 5
+#define DIMS0 3
+#define DIMS1 3
+#define DIMS2 3
#define DIME0 7
#define DIME1 7
#define DIME2 7
@@ -89,6 +89,7 @@ int main( void )
hid_t fapl; /* file access property list */
hid_t fapl2; /* file access property list w/latest format set */
hbool_t new_format; /* Whether to use the latest file format */
+ hbool_t chunk_cache; /* Whether to enable chunk caching */
int nerrors = 0;
h5_reset();
@@ -97,6 +98,9 @@ int main( void )
/* Copy the file access property list */
if((fapl2 = H5Pcopy(fapl)) < 0) TEST_ERROR
+ /* Disable chunk caching on fapl2 */
+ if(H5Pset_cache(fapl2, 521, 0, 0, 0.) < 0) TEST_ERROR
+
/* Set the "use the latest version of the format" bounds for creating objects in the file */
if(H5Pset_libver_bounds(fapl2, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0) TEST_ERROR
@@ -104,19 +108,44 @@ int main( void )
for(new_format = FALSE; new_format <= TRUE; new_format++) {
hid_t my_fapl;
- /* Set the FAPL for the type of format */
- if(new_format) {
- puts("Testing with new file format:");
- my_fapl = fapl2;
- } /* end if */
- else {
- puts("Testing with old file format:");
- my_fapl = fapl;
- } /* end else */
-
- nerrors += do_ranks( my_fapl ) < 0 ? 1 : 0;
- nerrors += test_external( my_fapl ) < 0 ? 1 : 0;
- nerrors += do_layouts( my_fapl ) < 0 ? 1 : 0;
+ /* Test chunked datasets with and without chunk cache */
+ for(chunk_cache = FALSE; chunk_cache <= TRUE; chunk_cache++) {
+ /* Output message about the type of format */
+ if(new_format)
+ printf("Testing with new file format");
+ else
+ printf("Testing with old file format");
+
+ /* Set the FAPL for the chunk cache settings */
+ if(chunk_cache) {
+ puts(" and chunk cache enabled:");
+ my_fapl = fapl;
+ } /* end if */
+ else {
+ puts(" and chunk cache disabled:");
+ my_fapl = fapl2;
+ } /* end else */
+
+ /* Set the FAPL for the type of format */
+ if(new_format) {
+ /* Set the "use the latest version of the format" bounds for
+ * creating objects in the file */
+ if(H5Pset_libver_bounds(my_fapl, H5F_LIBVER_LATEST,
+ H5F_LIBVER_LATEST) < 0) TEST_ERROR
+ } /* end if */
+ else
+ /* Set the "use the earliest version of the format" bounds for
+ * creating objects in the file */
+ if(H5Pset_libver_bounds(my_fapl, H5F_LIBVER_EARLIEST,
+ H5F_LIBVER_LATEST) < 0) TEST_ERROR
+
+ /* Tests which use chunked datasets */
+ nerrors += do_ranks( my_fapl ) < 0 ? 1 : 0;
+ } /* end for */
+
+ /* Tests which do not use chunked datasets */
+ nerrors += test_external( fapl ) < 0 ? 1 : 0;
+ nerrors += do_layouts( fapl ) < 0 ? 1 : 0;
} /* end for */
/* Close 2nd FAPL */