[svn-r25033] Purpose:

    Merged r24993 from the trunk.
    Adds core VFD write tracking functionality. When enabled, the core VFD
    will track dirty regions of the file and only write out the changed
    regions. The new H5Pget/set_core_write_tracking() API call controls this
    feature. A new "core_paged" VFD target was added to the check-vfd target
    in test/Makefile.am that runs all tests with the new write tracking
    functionality.

Tested on:
    32-bit LE linux (jam)
    64-bit LE linux (koala)
    64-bit BE linux (ostrich)

    Each platform was tested with HDF5_DRIVER set to "core" and "core_paged".
    Jam was also tested with the standard sec2 driver.

1 files changed, 13 insertions, 0 deletions

diff --git a/test/vfd.c b/test/vfd.c
index b85c054..4ece2ba 100644
--- a/test/vfd.c
+++ b/test/vfd.c
@@ -28,6 +28,7 @@
 #define FAMILY_SIZE2    (5*KB)
 #define MULTI_SIZE      128
 #define CORE_INCREMENT  (4*KB)
+#define CORE_PAGE_SIZE  (1024 * 1024)
 #define DSET1_NAME   "dset1"
 #define DSET1_DIM1   1024
 #define DSET1_DIM2   32
@@ -376,6 +377,8 @@ test_core(void)
     char        filename[1024];
     void        *fhandle=NULL;
     hsize_t     file_size;
+    hbool_t     use_write_tracking;
+    size_t      write_tracking_page_size;
     int    *points = NULL, *check = NULL, *p1, *p2;
     hid_t  dset1=-1, space1=-1;
     hsize_t  dims1[2];
@@ -387,6 +390,8 @@ test_core(void)
     fapl = h5_fileaccess();
     if(H5Pset_fapl_core(fapl, (size_t)CORE_INCREMENT, TRUE) < 0)
         TEST_ERROR;
+    if(H5Pset_core_write_tracking(fapl, TRUE, CORE_PAGE_SIZE) < 0)
+        TEST_ERROR;
     h5_fixname(FILENAME[1], fapl, filename, sizeof filename);
 
     if((file=H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT, fapl)) < 0)
@@ -400,6 +405,14 @@ test_core(void)
     if(H5FD_CORE != H5Pget_driver(access_fapl))
         TEST_ERROR;
 
+    /* Check that the backing store write tracking info was saved */
+    if(H5Pget_core_write_tracking(fapl, &use_write_tracking, &write_tracking_page_size) < 0)
+        TEST_ERROR;
+    if(TRUE != use_write_tracking)
+        TEST_ERROR;
+    if(CORE_PAGE_SIZE != write_tracking_page_size)
+        TEST_ERROR;
+
     /* ...and close the property list */
     if (H5Pclose(access_fapl) < 0)
         TEST_ERROR;