summaryrefslogtreecommitdiffstats
path: root/src/H5Dchunk.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/H5Dchunk.c')
-rw-r--r--src/H5Dchunk.c28
1 files changed, 21 insertions, 7 deletions
diff --git a/src/H5Dchunk.c b/src/H5Dchunk.c
index f335a25..f1e5d7b 100644
--- a/src/H5Dchunk.c
+++ b/src/H5Dchunk.c
@@ -3149,11 +3149,14 @@ H5D__chunk_hash_val(const H5D_shared_t *shared, const hsize_t *scaled)
herr_t
H5D__chunk_lookup(const H5D_t *dset, const hsize_t *scaled, H5D_chunk_ud_t *udata)
{
- H5D_rdcc_ent_t * ent = NULL; /* Cache entry */
- H5O_storage_chunk_t *sc = &(dset->shared->layout.storage.u.chunk);
- unsigned idx = 0; /* Index of chunk in cache, if present */
- hbool_t found = FALSE; /* In cache? */
- herr_t ret_value = SUCCEED; /* Return value */
+ H5D_rdcc_ent_t * ent = NULL; /* Cache entry */
+ H5O_storage_chunk_t *sc = &(dset->shared->layout.storage.u.chunk);
+ unsigned idx = 0; /* Index of chunk in cache, if present */
+ hbool_t found = FALSE; /* In cache? */
+#ifdef H5_HAVE_PARALLEL
+ hbool_t reenable_coll_md_reads = FALSE;
+#endif
+ herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_PACKAGE
@@ -3224,8 +3227,13 @@ H5D__chunk_lookup(const H5D_t *dset, const hsize_t *scaled, H5D_chunk_ud_t *udat
* highly unlikely that users would read the same chunks from all
* processes.
*/
- if (H5F_HAS_FEATURE(idx_info.f, H5FD_FEAT_HAS_MPI))
- H5CX_set_coll_metadata_read(FALSE);
+ if (H5F_HAS_FEATURE(idx_info.f, H5FD_FEAT_HAS_MPI)) {
+ hbool_t do_coll_md_reads = H5CX_get_coll_metadata_read();
+ if (do_coll_md_reads) {
+ H5CX_set_coll_metadata_read(FALSE);
+ reenable_coll_md_reads = TRUE;
+ }
+ }
#endif /* H5_HAVE_PARALLEL */
/* Go get the chunk information */
@@ -3268,6 +3276,12 @@ H5D__chunk_lookup(const H5D_t *dset, const hsize_t *scaled, H5D_chunk_ud_t *udat
} /* end else */
done:
+#ifdef H5_HAVE_PARALLEL
+ /* Re-enable collective metadata reads if we disabled them */
+ if (reenable_coll_md_reads)
+ H5CX_set_coll_metadata_read(TRUE);
+#endif /* H5_HAVE_PARALLEL */
+
FUNC_LEAVE_NOAPI(ret_value)
} /* H5D__chunk_lookup() */