[svn-r6387] Purpose:

    Bug Fix

Description:
    Metadata cache in parallel I/O can cause hangs in applications which
    perform independent I/O on chunked datasets, because the metadata cache
    can attempt to flush out dirty metadata from only a single process, instead
    of collectively from all processes.

Solution:
    Pass a dataset transfer property list down from every API function which
    could possibly trigger metadata I/O.

    Then, split the metadata cache into two sets of entries to allow dirty
    metadata to be set aside when a hash table collision occurs during
    independent I/O.

Platforms tested:
    Tested h5committest {arabica (fortran), eirene (fortran, C++)
        modi4 (parallel, fortran)}

    FreeBSD 4.7 (sleipnir) serial & parallel

Misc. update:
    Updated release_docs/RELEASE

1 files changed, 6 insertions, 6 deletions

diff --git a/src/H5MF.c b/src/H5MF.c
index 12fd240..4fcb23f 100644
--- a/src/H5MF.c
+++ b/src/H5MF.c
@@ -57,7 +57,7 @@ static int             interface_initialize_g = 0;
  *-------------------------------------------------------------------------
  */
 haddr_t
-H5MF_alloc(H5F_t *f, H5FD_mem_t type, hsize_t size)
+H5MF_alloc(H5F_t *f, H5FD_mem_t type, hid_t dxpl_id, hsize_t size)
 {
     haddr_t	ret_value;
     
@@ -72,7 +72,7 @@ H5MF_alloc(H5F_t *f, H5FD_mem_t type, hsize_t size)
 	HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, HADDR_UNDEF, "file is read-only");
 
     /* Allocate space from the virtual file layer */
-    if (HADDR_UNDEF==(ret_value=H5FD_alloc(f->shared->lf, type, size)))
+    if (HADDR_UNDEF==(ret_value=H5FD_alloc(f->shared->lf, type, dxpl_id, size)))
 	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, HADDR_UNDEF, "file allocation failed");
 
     /* Convert absolute file address to relative file address */
@@ -107,7 +107,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5MF_xfree(H5F_t *f, H5FD_mem_t type, haddr_t addr, hsize_t size)
+H5MF_xfree(H5F_t *f, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, hsize_t size)
 {
     herr_t      ret_value=SUCCEED;       /* Return value */
 
@@ -123,7 +123,7 @@ H5MF_xfree(H5F_t *f, H5FD_mem_t type, haddr_t addr, hsize_t size)
     addr += f->shared->base_addr;
 
     /* Allow virtual file layer to free block */
-    if (H5FD_free(f->shared->lf, type, addr, size)<0) {
+    if (H5FD_free(f->shared->lf, type, dxpl_id, addr, size)<0) {
 #ifdef H5MF_DEBUG
 	if (H5DEBUG(MF)) {
 	    fprintf(H5DEBUG(MF),
@@ -174,7 +174,7 @@ done:
  *-------------------------------------------------------------------------
  */
 haddr_t
-H5MF_realloc(H5F_t *f, H5FD_mem_t type, haddr_t old_addr, hsize_t old_size,
+H5MF_realloc(H5F_t *f, H5FD_mem_t type, hid_t dxpl_id, haddr_t old_addr, hsize_t old_size,
 	     hsize_t new_size)
 {
     haddr_t	ret_value;
@@ -185,7 +185,7 @@ H5MF_realloc(H5F_t *f, H5FD_mem_t type, haddr_t old_addr, hsize_t old_size,
     old_addr += f->shared->base_addr;
 
     /* Reallocate memory from the virtual file layer */
-    ret_value = H5FD_realloc(f->shared->lf, type, old_addr, old_size,
+    ret_value = H5FD_realloc(f->shared->lf, type, dxpl_id, old_addr, old_size,
 			     new_size);
     if (HADDR_UNDEF==ret_value)
 	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, HADDR_UNDEF, "unable to allocate new file memory");