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-rw-r--r--src/H5Faccum.c206
1 files changed, 150 insertions, 56 deletions
diff --git a/src/H5Faccum.c b/src/H5Faccum.c
index 05f6910..8e5ea4a 100644
--- a/src/H5Faccum.c
+++ b/src/H5Faccum.c
@@ -40,6 +40,7 @@
#include "H5Eprivate.h" /* Error handling */
#include "H5Fpkg.h" /* File access */
#include "H5FDprivate.h" /* File drivers */
+#include "H5Vprivate.h" /* Vectors and arrays */
/****************/
@@ -49,12 +50,19 @@
/* Metadata accumulator controls */
#define H5F_ACCUM_THROTTLE 8
#define H5F_ACCUM_THRESHOLD 2048
+#define H5F_ACCUM_MAX_SIZE (1024 *1024) /* Max. accum. buf size (max. I/Os will be 1/2 this size) */
/******************/
/* Local Typedefs */
/******************/
+/* Enumerated type to indicate how data will be added to accumulator */
+typedef enum {
+ H5F_ACCUM_PREPEND, /* Data will be prepended to accumulator */
+ H5F_ACCUM_APPEND /* Data will be appended to accumulator */
+} H5F_accum_adjust_t;
+
/********************/
/* Package Typedefs */
@@ -112,7 +120,8 @@ H5F_accum_read(const H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, haddr_t addr,
HDassert(buf);
/* Check if this information is in the metadata accumulator */
- if((f->shared->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) && type != H5FD_MEM_DRAW) {
+ if((f->shared->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) && type != H5FD_MEM_DRAW
+ && size < H5F_ACCUM_MAX_SIZE) {
/* Current read overlaps with metadata accumulator */
if(H5F_addr_overlap(addr, size, f->shared->accum.loc, f->shared->accum.size)) {
unsigned char *read_buf = (unsigned char *)buf; /* Pointer to the buffer being read in */
@@ -195,12 +204,17 @@ H5F_accum_read(const H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, haddr_t addr,
/* Cache the new piece of metadata */
/* Check if we need to resize the buffer */
if(size > f->shared->accum.alloc_size) {
+ size_t new_size; /* New size of accumulator */
+
+ /* Adjust the buffer size to be a power of 2 that is large enough to hold data */
+ new_size = (size_t)1 << (1 + H5V_log2_gen(size - 1));
+
/* Grow the metadata accumulator buffer */
- if(NULL == (f->shared->accum.buf = H5FL_BLK_REALLOC(meta_accum, f->shared->accum.buf, size)))
+ if(NULL == (f->shared->accum.buf = H5FL_BLK_REALLOC(meta_accum, f->shared->accum.buf, new_size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate metadata accumulator buffer")
/* Note the new buffer size */
- f->shared->accum.alloc_size = size;
+ f->shared->accum.alloc_size = new_size;
} /* end if */
else {
/* Check if we should shrink the accumulator buffer */
@@ -246,6 +260,111 @@ done:
/*-------------------------------------------------------------------------
+ * Function: H5F_accum_adjust
+ *
+ * Purpose: Adjust accumulator size, if necessary
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@hdfgroup.org
+ * Jun 11 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5F_accum_adjust(H5F_meta_accum_t *accum, H5FD_t *lf, hid_t dxpl_id,
+ H5F_accum_adjust_t adjust, size_t size)
+{
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_NOAPI_NOINIT(H5F_accum_adjust)
+
+ HDassert(accum);
+ HDassert(lf);
+ HDassert(size > 0);
+ HDassert(size <= H5F_ACCUM_MAX_SIZE);
+
+ /* Check if we need more buffer space */
+ if((size + accum->size) > accum->alloc_size) {
+ size_t new_size; /* New size of accumulator */
+
+ /* Adjust the buffer size to be a power of 2 that is large enough to hold data */
+ new_size = (size_t)1 << (1 + H5V_log2_gen((size + accum->size) - 1));
+
+ /* Check for accumulator getting too big */
+ if(new_size > H5F_ACCUM_MAX_SIZE) {
+ size_t shrink_size; /* Amount to shrink accumulator by */
+ size_t remnant_size; /* Amount left in accumulator */
+
+ /* Cap the accumulator's growth, leaving some room */
+
+ /* Determine the amounts to work with */
+ if(size > (H5F_ACCUM_MAX_SIZE / 2)) {
+ new_size = H5F_ACCUM_MAX_SIZE;
+ shrink_size = accum->size;
+ remnant_size = 0;
+ } /* end if */
+ else {
+ new_size = (H5F_ACCUM_MAX_SIZE / 2);
+ shrink_size = (H5F_ACCUM_MAX_SIZE / 2);
+ remnant_size = accum->size - shrink_size;
+ } /* end else */
+
+ /* Check if we need to flush accumulator data to file */
+ if(accum->dirty) {
+ /* Check whether to accumulator will be prepended or appended */
+ if(H5F_ACCUM_PREPEND == adjust) {
+ /* Write out upper part of the existing metadata accumulator, with dispatch to driver */
+ if(H5FD_write(lf, dxpl_id, H5FD_MEM_DEFAULT, (accum->loc + remnant_size), shrink_size, (accum->buf + remnant_size)) < 0)
+ HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
+ } /* end if */
+ else {
+ /* Sanity check */
+ HDassert(H5F_ACCUM_APPEND == adjust);
+
+ /* Write out lower part of the existing metadata accumulator, with dispatch to driver */
+ if(H5FD_write(lf, dxpl_id, H5FD_MEM_DEFAULT, accum->loc, shrink_size, accum->buf) < 0)
+ HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
+
+ /* Move remnant of accumulator down */
+ HDmemmove(accum->buf, (accum->buf + shrink_size), remnant_size);
+
+ /* Adjust accumulator's location */
+ accum->loc += shrink_size;
+ } /* end else */
+
+ /* Reset accumulator dirty flag (in case of error) */
+ accum->dirty = FALSE;
+ } /* end if */
+
+ /* Trim the accumulator's use of its buffer */
+ accum->size = remnant_size;
+ } /* end if */
+
+ /* Check for accumulator needing to be reallocated */
+ if(new_size > accum->alloc_size) {
+ unsigned char *new_buf; /* New buffer to hold the accumulated metadata */
+
+ /* Reallocate the metadata accumulator buffer */
+ if(NULL == (new_buf = H5FL_BLK_REALLOC(meta_accum, accum->buf, new_size)))
+ HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate metadata accumulator buffer")
+
+ /* Update accumulator info */
+ accum->buf = new_buf;
+ accum->alloc_size = new_size;
+#ifdef H5_CLEAR_MEMORY
+HDmemset(accum->buf + accum->size, 0, (accum->alloc_size - (accum->size + size)));
+#endif /* H5_CLEAR_MEMORY */
+ } /* end if */
+ } /* end if */
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5F_accum_adjust() */
+
+
+/*-------------------------------------------------------------------------
* Function: H5F_accum_write
*
* Purpose: Attempts to read some data from the metadata accumulator for
@@ -273,23 +392,15 @@ H5F_accum_write(const H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, haddr_t addr,
HDassert(buf);
/* Check for accumulating metadata */
- if((f->shared->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) && type != H5FD_MEM_DRAW) {
+ if((f->shared->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) && type != H5FD_MEM_DRAW
+ && size < H5F_ACCUM_MAX_SIZE) {
/* Check if there is already metadata in the accumulator */
if(f->shared->accum.size > 0) {
/* Check if the new metadata adjoins the beginning of the current accumulator */
if((addr + size) == f->shared->accum.loc) {
- /* Check if we need more buffer space */
- if((size + f->shared->accum.size) > f->shared->accum.alloc_size) {
- /* Adjust the buffer size, by doubling it */
- f->shared->accum.alloc_size = MAX(f->shared->accum.alloc_size * 2, size + f->shared->accum.size);
-
- /* Reallocate the metadata accumulator buffer */
- if(NULL == (f->shared->accum.buf = H5FL_BLK_REALLOC(meta_accum, f->shared->accum.buf, f->shared->accum.alloc_size)))
- HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate metadata accumulator buffer")
-#ifdef H5_CLEAR_MEMORY
-HDmemset(f->shared->accum.buf + f->shared->accum.size, 0, (f->shared->accum.alloc_size - (f->shared->accum.size + size)));
-#endif /* H5_CLEAR_MEMORY */
- } /* end if */
+ /* Check if we need to adjust accumulator size */
+ if(H5F_accum_adjust(&f->shared->accum, f->shared->lf, dxpl_id, H5F_ACCUM_PREPEND, size) < 0)
+ HGOTO_ERROR(H5E_IO, H5E_CANTRESIZE, FAIL, "can't adjust metadata accumulator")
/* Move the existing metadata to the proper location */
HDmemmove(f->shared->accum.buf + size, f->shared->accum.buf, f->shared->accum.size);
@@ -306,18 +417,9 @@ HDmemset(f->shared->accum.buf + f->shared->accum.size, 0, (f->shared->accum.allo
} /* end if */
/* Check if the new metadata adjoins the end of the current accumulator */
else if(addr == (f->shared->accum.loc + f->shared->accum.size)) {
- /* Check if we need more buffer space */
- if((size + f->shared->accum.size) > f->shared->accum.alloc_size) {
- /* Adjust the buffer size, by doubling it */
- f->shared->accum.alloc_size = MAX(f->shared->accum.alloc_size * 2, size + f->shared->accum.size);
-
- /* Reallocate the metadata accumulator buffer */
- if(NULL == (f->shared->accum.buf = H5FL_BLK_REALLOC(meta_accum, f->shared->accum.buf, f->shared->accum.alloc_size)))
- HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate metadata accumulator buffer")
-#ifdef H5_CLEAR_MEMORY
-HDmemset(f->shared->accum.buf + f->shared->accum.size + size, 0, (f->shared->accum.alloc_size - (f->shared->accum.size + size)));
-#endif /* H5_CLEAR_MEMORY */
- } /* end if */
+ /* Check if we need to adjust accumulator size */
+ if(H5F_accum_adjust(&f->shared->accum, f->shared->lf, dxpl_id, H5F_ACCUM_APPEND, size) < 0)
+ HGOTO_ERROR(H5E_IO, H5E_CANTRESIZE, FAIL, "can't adjust metadata accumulator")
/* Copy the new metadata to the end */
HDmemcpy(f->shared->accum.buf + f->shared->accum.size, buf, size);
@@ -347,18 +449,9 @@ HDmemset(f->shared->accum.buf + f->shared->accum.size + size, 0, (f->shared->acc
/* Calculate the new accumulator size, based on the amount of overlap */
H5_ASSIGN_OVERFLOW(new_size, (f->shared->accum.loc - addr) + f->shared->accum.size, hsize_t, size_t);
- /* Check if we need more buffer space */
- if(new_size > f->shared->accum.alloc_size) {
- /* Adjust the buffer size, by doubling it */
- f->shared->accum.alloc_size = MAX(f->shared->accum.alloc_size + 2, new_size);
-
- /* Reallocate the metadata accumulator buffer */
- if(NULL == (f->shared->accum.buf = H5FL_BLK_REALLOC(meta_accum, f->shared->accum.buf, f->shared->accum.alloc_size)))
- HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate metadata accumulator buffer")
-#ifdef H5_CLEAR_MEMORY
-HDmemset(f->shared->accum.buf + f->shared->accum.size, 0, (f->shared->accum.alloc_size - f->shared->accum.size));
-#endif /* H5_CLEAR_MEMORY */
- } /* end if */
+ /* Check if we need to adjust accumulator size */
+ if(H5F_accum_adjust(&f->shared->accum, f->shared->lf, dxpl_id, H5F_ACCUM_PREPEND, (new_size - f->shared->accum.size)) < 0)
+ HGOTO_ERROR(H5E_IO, H5E_CANTRESIZE, FAIL, "can't adjust metadata accumulator")
/* Calculate the proper offset of the existing metadata */
H5_ASSIGN_OVERFLOW(old_offset, (addr + size) - f->shared->accum.loc, hsize_t, size_t);
@@ -381,18 +474,9 @@ HDmemset(f->shared->accum.buf + f->shared->accum.size, 0, (f->shared->accum.allo
/* Calculate the new accumulator size, based on the amount of overlap */
H5_ASSIGN_OVERFLOW(new_size, (addr - f->shared->accum.loc) + size, hsize_t, size_t);
- /* Check if we need more buffer space */
- if(new_size > f->shared->accum.alloc_size) {
- /* Adjust the buffer size, by doubling it */
- f->shared->accum.alloc_size = MAX(f->shared->accum.alloc_size * 2, new_size);
-
- /* Reallocate the metadata accumulator buffer */
- if(NULL == (f->shared->accum.buf = H5FL_BLK_REALLOC(meta_accum, f->shared->accum.buf, f->shared->accum.alloc_size)))
- HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate metadata accumulator buffer")
-#ifdef H5_CLEAR_MEMORY
-HDmemset(f->shared->accum.buf + f->shared->accum.size, 0, (f->shared->accum.alloc_size - f->shared->accum.size));
-#endif /* H5_CLEAR_MEMORY */
- } /* end if */
+ /* Check if we need to adjust accumulator size */
+ if(H5F_accum_adjust(&f->shared->accum, f->shared->lf, dxpl_id, H5F_ACCUM_APPEND, (new_size - f->shared->accum.size)) < 0)
+ HGOTO_ERROR(H5E_IO, H5E_CANTRESIZE, FAIL, "can't adjust metadata accumulator")
/* Copy the new metadata to the end */
HDmemcpy(f->shared->accum.buf + (addr - f->shared->accum.loc), buf, size);
@@ -421,12 +505,17 @@ HDmemset(f->shared->accum.buf + f->shared->accum.size, 0, (f->shared->accum.allo
/* Cache the new piece of metadata */
/* Check if we need to resize the buffer */
if(size > f->shared->accum.alloc_size) {
+ size_t new_size; /* New size of accumulator */
+
+ /* Adjust the buffer size to be a power of 2 that is large enough to hold data */
+ new_size = (size_t)1 << (1 + H5V_log2_gen(size - 1));
+
/* Grow the metadata accumulator buffer */
- if(NULL == (f->shared->accum.buf = H5FL_BLK_REALLOC(meta_accum, f->shared->accum.buf, size)))
+ if(NULL == (f->shared->accum.buf = H5FL_BLK_REALLOC(meta_accum, f->shared->accum.buf, new_size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate metadata accumulator buffer")
/* Note the new buffer size */
- f->shared->accum.alloc_size = size;
+ f->shared->accum.alloc_size = new_size;
#ifdef H5_CLEAR_MEMORY
{
size_t clear_size = MAX(f->shared->accum.size, size);
@@ -462,12 +551,17 @@ HDmemset(f->shared->accum.buf + clear_size, 0, (f->shared->accum.alloc_size - cl
else {
/* Check if we need to reallocate the buffer */
if(size > f->shared->accum.alloc_size) {
+ size_t new_size; /* New size of accumulator */
+
+ /* Adjust the buffer size to be a power of 2 that is large enough to hold data */
+ new_size = (size_t)1 << (1 + H5V_log2_gen(size - 1));
+
/* Reallocate the metadata accumulator buffer */
- if(NULL == (f->shared->accum.buf = H5FL_BLK_REALLOC(meta_accum, f->shared->accum.buf, size)))
+ if(NULL == (f->shared->accum.buf = H5FL_BLK_REALLOC(meta_accum, f->shared->accum.buf, new_size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate metadata accumulator buffer")
/* Note the new buffer size */
- f->shared->accum.alloc_size = size;
+ f->shared->accum.alloc_size = new_size;
} /* end if */
/* Update the metadata accumulator information */