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hdf5/src/H5Faccum.c
Quincey Koziol c36d2eeae7 Switch shared file struct name from 'H5F_file_t' to 'H5F_shared_t', to match 
naming convention for shared structs in rest of library data structures.
2019-08-22 13:28:20 -05:00

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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5Faccum.c
* Jan 10 2008
* Quincey Koziol <koziol@hdfgroup.org>
*
* Purpose: File metadata "accumulator" routines. (Used to
* cache small metadata I/Os and group them into a
* single larger I/O)
*
*-------------------------------------------------------------------------
*/
/****************/
/* Module Setup */
/****************/
#include "H5Fmodule.h" /* This source code file is part of the H5F module */
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fpkg.h" /* File access */
#include "H5FDprivate.h" /* File drivers */
#include "H5MMprivate.h" /* Memory management */
#include "H5VMprivate.h" /* Vectors and arrays */
/****************/
/* Local Macros */
/****************/
/* 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 */
/********************/
/********************/
/* Local Prototypes */
/********************/
/*********************/
/* Package Variables */
/*********************/
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/* Declare a PQ free list to manage the metadata accumulator buffer */
H5FL_BLK_DEFINE_STATIC(meta_accum);
/*-------------------------------------------------------------------------
* Function: H5F__accum_read
*
* Purpose: Attempts to read some data from the metadata accumulator for
* a file into a buffer.
*
* Note: We can't change (or add to) the metadata accumulator, because
* this might be a speculative read and could possibly read raw
* data into the metadata accumulator.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Jan 10 2008
*
*-------------------------------------------------------------------------
*/
herr_t
H5F__accum_read(H5F_shared_t *f_sh, H5FD_mem_t map_type, haddr_t addr,
size_t size, void *buf/*out*/)
{
H5FD_t *file; /* File driver pointer */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_PACKAGE
/* Sanity checks */
HDassert(f_sh);
HDassert(buf);
/* Translate to file driver I/O info object */
file = f_sh->lf;
/* Check if this information is in the metadata accumulator */
if((f_sh->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) && map_type != H5FD_MEM_DRAW) {
H5F_meta_accum_t *accum; /* Alias for file's metadata accumulator */
/* Set up alias for file's metadata accumulator info */
accum = &f_sh->accum;
if(size < H5F_ACCUM_MAX_SIZE) {
/* Sanity check */
HDassert(!accum->buf || (accum->alloc_size >= accum->size));
/* Current read adjoins or overlaps with metadata accumulator */
if(H5F_addr_overlap(addr, size, accum->loc, accum->size)
|| ((addr + size) == accum->loc)
|| (accum->loc + accum->size) == addr) {
size_t amount_before; /* Amount to read before current accumulator */
haddr_t new_addr; /* New address of the accumulator buffer */
size_t new_size; /* New size of the accumulator buffer */
/* Compute new values for accumulator */
new_addr = MIN(addr, accum->loc);
new_size = (size_t)(MAX((addr + size), (accum->loc + accum->size)) - new_addr);
/* Check if we need more buffer space */
if(new_size > accum->alloc_size) {
size_t new_alloc_size; /* New size of accumulator */
/* Adjust the buffer size to be a power of 2 that is large enough to hold data */
new_alloc_size = (size_t)1 << (1 + H5VM_log2_gen((uint64_t)(new_size - 1)));
/* Reallocate the metadata accumulator buffer */
if(NULL == (accum->buf = H5FL_BLK_REALLOC(meta_accum, accum->buf, new_alloc_size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate metadata accumulator buffer")
/* Note the new buffer size */
accum->alloc_size = new_alloc_size;
/* Clear the memory */
HDmemset(accum->buf + accum->size, 0, (accum->alloc_size - accum->size));
} /* end if */
/* Read the part before the metadata accumulator */
if(addr < accum->loc) {
/* Set the amount to read */
H5_CHECKED_ASSIGN(amount_before, size_t, (accum->loc - addr), hsize_t);
/* Make room for the metadata to read in */
HDmemmove(accum->buf + amount_before, accum->buf, accum->size);
/* Adjust dirty region tracking info, if present */
if(accum->dirty)
accum->dirty_off += amount_before;
/* Dispatch to driver */
if(H5FD_read(file, map_type, addr, amount_before, accum->buf) < 0)
HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "driver read request failed")
} /* end if */
else
amount_before = 0;
/* Read the part after the metadata accumulator */
if((addr + size) > (accum->loc + accum->size)) {
size_t amount_after; /* Amount to read at a time */
/* Set the amount to read */
H5_CHECKED_ASSIGN(amount_after, size_t, ((addr + size) - (accum->loc + accum->size)), hsize_t);
/* Dispatch to driver */
if(H5FD_read(file, map_type, (accum->loc + accum->size), amount_after, (accum->buf + accum->size + amount_before)) < 0)
HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "driver read request failed")
} /* end if */
/* Copy the data out of the buffer */
H5MM_memcpy(buf, accum->buf + (addr - new_addr), size);
/* Adjust the accumulator address & size */
accum->loc = new_addr;
accum->size = new_size;
} /* end if */
/* Current read doesn't overlap with metadata accumulator, read it from file */
else {
/* Dispatch to driver */
if(H5FD_read(file, map_type, addr, size, buf) < 0)
HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "driver read request failed")
} /* end else */
} /* end if */
else {
/* Read the data */
if(H5FD_read(file, map_type, addr, size, buf) < 0)
HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "driver read request failed")
/* Check for overlap w/dirty accumulator */
/* (Note that this could be improved by updating the non-dirty
* information in the accumulator with [some of] the information
* just read in. -QAK)
*/
if(accum->dirty &&
H5F_addr_overlap(addr, size, accum->loc + accum->dirty_off, accum->dirty_len)) {
haddr_t dirty_loc = accum->loc + accum->dirty_off; /* File offset of dirty information */
size_t buf_off; /* Offset of dirty region in buffer */
size_t dirty_off; /* Offset within dirty region */
size_t overlap_size; /* Size of overlap with dirty region */
/* Check for read starting before beginning dirty region */
if(H5F_addr_le(addr, dirty_loc)) {
/* Compute offset of dirty region within buffer */
buf_off = (size_t)(dirty_loc - addr);
/* Compute offset within dirty region */
dirty_off = 0;
/* Check for read ending within dirty region */
if(H5F_addr_lt(addr + size, dirty_loc + accum->dirty_len))
overlap_size = (size_t)((addr + size) - buf_off);
else /* Access covers whole dirty region */
overlap_size = accum->dirty_len;
} /* end if */
else { /* Read starts after beginning of dirty region */
/* Compute dirty offset within buffer and overlap size */
buf_off = 0;
dirty_off = (size_t)(addr - dirty_loc);
overlap_size = (size_t)((dirty_loc + accum->dirty_len) - addr);
} /* end else */
/* Copy the dirty region to buffer */
H5MM_memcpy((unsigned char *)buf + buf_off, (unsigned char *)accum->buf + accum->dirty_off + dirty_off, overlap_size);
} /* end if */
} /* end else */
} /* end if */
else {
/* Read the data */
if(H5FD_read(file, map_type, addr, size, buf) < 0)
HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "driver read request failed")
} /* end else */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F__accum_read() */
/*-------------------------------------------------------------------------
* 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 *file,
H5F_accum_adjust_t adjust, size_t size)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_STATIC
HDassert(accum);
HDassert(file);
HDassert(H5F_ACCUM_APPEND == adjust || H5F_ACCUM_PREPEND == adjust);
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 + H5VM_log2_gen((uint64_t)((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 {
if(H5F_ACCUM_PREPEND == adjust) {
new_size = (H5F_ACCUM_MAX_SIZE / 2);
shrink_size = (H5F_ACCUM_MAX_SIZE / 2);
remnant_size = accum->size - shrink_size;
} /* end if */
else {
size_t adjust_size = size + accum->dirty_len;
/* Check if we can slide the dirty region down, to accommodate the request */
if(accum->dirty && (adjust_size <= H5F_ACCUM_MAX_SIZE)) {
if((ssize_t)(H5F_ACCUM_MAX_SIZE - (accum->dirty_off + adjust_size)) >= (ssize_t)(2 * size))
shrink_size = accum->dirty_off / 2;
else
shrink_size = accum->dirty_off;
remnant_size = accum->size - shrink_size;
new_size = remnant_size + size;
} /* 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 */
} /* end else */
} /* 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) {
/* Check if the dirty region overlaps the region to eliminate from the accumulator */
if((accum->size - shrink_size) < (accum->dirty_off + accum->dirty_len)) {
/* Write out the dirty region from the metadata accumulator, with dispatch to driver */
if(H5FD_write(file, H5FD_MEM_DEFAULT, (accum->loc + accum->dirty_off), accum->dirty_len, (accum->buf + accum->dirty_off)) < 0)
HGOTO_ERROR(H5E_FILE, H5E_WRITEERROR, FAIL, "file write failed")
/* Reset accumulator dirty flag */
accum->dirty = FALSE;
} /* end if */
} /* end if */
else {
/* Check if the dirty region overlaps the region to eliminate from the accumulator */
if(shrink_size > accum->dirty_off) {
/* Write out the dirty region from the metadata accumulator, with dispatch to driver */
if(H5FD_write(file, H5FD_MEM_DEFAULT, (accum->loc + accum->dirty_off), accum->dirty_len, (accum->buf + accum->dirty_off)) < 0)
HGOTO_ERROR(H5E_FILE, H5E_WRITEERROR, FAIL, "file write failed")
/* Reset accumulator dirty flag */
accum->dirty = FALSE;
} /* end if */
/* Adjust dirty region tracking info */
accum->dirty_off -= shrink_size;
} /* end else */
} /* end if */
/* Trim the accumulator's use of its buffer */
accum->size = remnant_size;
/* When appending, need to adjust location of accumulator */
if(H5F_ACCUM_APPEND == adjust) {
/* Move remnant of accumulator down */
HDmemmove(accum->buf, (accum->buf + shrink_size), remnant_size);
/* Adjust accumulator's location */
accum->loc += shrink_size;
} /* end if */
} /* 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_FILE, H5E_CANTALLOC, FAIL, "unable to allocate metadata accumulator buffer")
/* Update accumulator info */
accum->buf = new_buf;
accum->alloc_size = new_size;
/* Clear the memory */
HDmemset(accum->buf + accum->size, 0, (accum->alloc_size - (accum->size + size)));
} /* end if */
} /* end if */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F__accum_adjust() */
/*-------------------------------------------------------------------------
* Function: H5F__accum_write
*
* Purpose: Attempts to write some data to the metadata accumulator for
* a file from a buffer.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Jan 10 2008
*
*-------------------------------------------------------------------------
*/
herr_t
H5F__accum_write(H5F_shared_t *f_sh, H5FD_mem_t map_type, haddr_t addr,
size_t size, const void *buf)
{
H5FD_t *file; /* File driver pointer */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(f_sh);
HDassert(H5F_SHARED_INTENT(f_sh) & H5F_ACC_RDWR);
HDassert(buf);
/* Translate to file driver pointer */
file = f_sh->lf;
/* Check for accumulating metadata */
if((f_sh->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) && map_type != H5FD_MEM_DRAW) {
H5F_meta_accum_t *accum; /* Alias for file's metadata accumulator */
/* Set up alias for file's metadata accumulator info */
accum = &f_sh->accum;
if(size < H5F_ACCUM_MAX_SIZE) {
/* Sanity check */
HDassert(!accum->buf || (accum->alloc_size >= accum->size));
/* Check if there is already metadata in the accumulator */
if(accum->size > 0) {
/* Check if the new metadata adjoins the beginning of the current accumulator */
if((addr + size) == accum->loc) {
/* Check if we need to adjust accumulator size */
if(H5F__accum_adjust(accum, file, 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(accum->buf + size, accum->buf, accum->size);
/* Copy the new metadata at the front */
H5MM_memcpy(accum->buf, buf, size);
/* Set the new size & location of the metadata accumulator */
accum->loc = addr;
accum->size += size;
/* Adjust the dirty region and mark accumulator dirty */
if(accum->dirty)
accum->dirty_len = size + accum->dirty_off + accum->dirty_len;
else {
accum->dirty_len = size;
accum->dirty = TRUE;
} /* end else */
accum->dirty_off = 0;
} /* end if */
/* Check if the new metadata adjoins the end of the current accumulator */
else if(addr == (accum->loc + accum->size)) {
/* Check if we need to adjust accumulator size */
if(H5F__accum_adjust(accum, file, H5F_ACCUM_APPEND, size) < 0)
HGOTO_ERROR(H5E_IO, H5E_CANTRESIZE, FAIL, "can't adjust metadata accumulator")
/* Copy the new metadata to the end */
H5MM_memcpy(accum->buf + accum->size, buf, size);
/* Adjust the dirty region and mark accumulator dirty */
if(accum->dirty)
accum->dirty_len = size + (accum->size - accum->dirty_off);
else {
accum->dirty_off = accum->size;
accum->dirty_len = size;
accum->dirty = TRUE;
} /* end else */
/* Set the new size of the metadata accumulator */
accum->size += size;
} /* end if */
/* Check if the piece of metadata being written overlaps the metadata accumulator */
else if(H5F_addr_overlap(addr, size, accum->loc, accum->size)) {
size_t add_size; /* New size of the accumulator buffer */
/* Check if the new metadata is entirely within the current accumulator */
if(addr >= accum->loc && (addr + size) <= (accum->loc + accum->size)) {
size_t dirty_off = (size_t)(addr - accum->loc);
/* Copy the new metadata to the proper location within the accumulator */
H5MM_memcpy(accum->buf + dirty_off, buf, size);
/* Adjust the dirty region and mark accumulator dirty */
if(accum->dirty) {
/* Check for new metadata starting before current dirty region */
if(dirty_off <= accum->dirty_off) {
if((dirty_off + size) <= (accum->dirty_off + accum->dirty_len))
accum->dirty_len = (accum->dirty_off + accum->dirty_len) - dirty_off;
else
accum->dirty_len = size;
accum->dirty_off = dirty_off;
} /* end if */
else {
if((dirty_off + size) <= (accum->dirty_off + accum->dirty_len))
; /* accum->dirty_len doesn't change */
else
accum->dirty_len = (dirty_off + size) - accum->dirty_off;
} /* end else */
} /* end if */
else {
accum->dirty_off = dirty_off;
accum->dirty_len = size;
accum->dirty = TRUE;
} /* end else */
} /* end if */
/* Check if the new metadata overlaps the beginning of the current accumulator */
else if(addr < accum->loc && (addr + size) <= (accum->loc + accum->size)) {
size_t old_offset; /* Offset of old data within the accumulator buffer */
/* Calculate the amount we will need to add to the accumulator size, based on the amount of overlap */
H5_CHECKED_ASSIGN(add_size, size_t, (accum->loc - addr), hsize_t);
/* Check if we need to adjust accumulator size */
if(H5F__accum_adjust(accum, file, H5F_ACCUM_PREPEND, add_size) < 0)
HGOTO_ERROR(H5E_IO, H5E_CANTRESIZE, FAIL, "can't adjust metadata accumulator")
/* Calculate the proper offset of the existing metadata */
H5_CHECKED_ASSIGN(old_offset, size_t, (addr + size) - accum->loc, hsize_t);
/* Move the existing metadata to the proper location */
HDmemmove(accum->buf + size, accum->buf + old_offset, (accum->size - old_offset));
/* Copy the new metadata at the front */
H5MM_memcpy(accum->buf, buf, size);
/* Set the new size & location of the metadata accumulator */
accum->loc = addr;
accum->size += add_size;
/* Adjust the dirty region and mark accumulator dirty */
if(accum->dirty) {
size_t curr_dirty_end = add_size + accum->dirty_off + accum->dirty_len;
accum->dirty_off = 0;
if(size <= curr_dirty_end)
accum->dirty_len = curr_dirty_end;
else
accum->dirty_len = size;
} /* end if */
else {
accum->dirty_off = 0;
accum->dirty_len = size;
accum->dirty = TRUE;
} /* end else */
} /* end if */
/* Check if the new metadata overlaps the end of the current accumulator */
else if(addr >= accum->loc && (addr + size) > (accum->loc + accum->size)) {
size_t dirty_off; /* Offset of dirty region */
/* Calculate the amount we will need to add to the accumulator size, based on the amount of overlap */
H5_CHECKED_ASSIGN(add_size, size_t, (addr + size) - (accum->loc + accum->size), hsize_t);
/* Check if we need to adjust accumulator size */
if(H5F__accum_adjust(accum, file, H5F_ACCUM_APPEND, add_size) < 0)
HGOTO_ERROR(H5E_IO, H5E_CANTRESIZE, FAIL, "can't adjust metadata accumulator")
/* Compute offset of dirty region (after adjusting accumulator) */
dirty_off = (size_t)(addr - accum->loc);
/* Copy the new metadata to the end */
H5MM_memcpy(accum->buf + dirty_off, buf, size);
/* Set the new size of the metadata accumulator */
accum->size += add_size;
/* Adjust the dirty region and mark accumulator dirty */
if(accum->dirty) {
/* Check for new metadata starting before current dirty region */
if(dirty_off <= accum->dirty_off) {
accum->dirty_off = dirty_off;
accum->dirty_len = size;
} /* end if */
else {
accum->dirty_len = (dirty_off + size) - accum->dirty_off;
} /* end else */
} /* end if */
else {
accum->dirty_off = dirty_off;
accum->dirty_len = size;
accum->dirty = TRUE;
} /* end else */
} /* end if */
/* New metadata overlaps both ends of the current accumulator */
else {
/* Check if we need more buffer space */
if(size > accum->alloc_size) {
size_t new_alloc_size; /* New size of accumulator */
/* Adjust the buffer size to be a power of 2 that is large enough to hold data */
new_alloc_size = (size_t)1 << (1 + H5VM_log2_gen((uint64_t)(size - 1)));
/* Reallocate the metadata accumulator buffer */
if(NULL == (accum->buf = H5FL_BLK_REALLOC(meta_accum, accum->buf, new_alloc_size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate metadata accumulator buffer")
/* Note the new buffer size */
accum->alloc_size = new_alloc_size;
/* Clear the memory */
HDmemset(accum->buf + size, 0, (accum->alloc_size - size));
} /* end if */
/* Copy the new metadata to the buffer */
H5MM_memcpy(accum->buf, buf, size);
/* Set the new size & location of the metadata accumulator */
accum->loc = addr;
accum->size = size;
/* Adjust the dirty region and mark accumulator dirty */
accum->dirty_off = 0;
accum->dirty_len = size;
accum->dirty = TRUE;
} /* end else */
} /* end if */
/* New piece of metadata doesn't adjoin or overlap the existing accumulator */
else {
/* Write out the existing metadata accumulator, with dispatch to driver */
if(accum->dirty) {
if(H5FD_write(file, H5FD_MEM_DEFAULT, accum->loc + accum->dirty_off, accum->dirty_len, accum->buf + accum->dirty_off) < 0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
/* Reset accumulator dirty flag */
accum->dirty = FALSE;
} /* end if */
/* Cache the new piece of metadata */
/* Check if we need to resize the buffer */
if(size > accum->alloc_size) {
size_t new_size; /* New size of accumulator */
size_t clear_size; /* Size of memory that needs clearing */
/* Adjust the buffer size to be a power of 2 that is large enough to hold data */
new_size = (size_t)1 << (1 + H5VM_log2_gen((uint64_t)(size - 1)));
/* Grow the metadata accumulator buffer */
if(NULL == (accum->buf = H5FL_BLK_REALLOC(meta_accum, accum->buf, new_size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate metadata accumulator buffer")
/* Note the new buffer size */
accum->alloc_size = new_size;
/* Clear the memory */
clear_size = MAX(accum->size, size);
HDmemset(accum->buf + clear_size, 0, (accum->alloc_size - clear_size));
} /* end if */
else {
/* Check if we should shrink the accumulator buffer */
if(size < (accum->alloc_size / H5F_ACCUM_THROTTLE) &&
accum->alloc_size > H5F_ACCUM_THRESHOLD) {
size_t tmp_size = (accum->alloc_size / H5F_ACCUM_THROTTLE); /* New size of accumulator buffer */
/* Shrink the accumulator buffer */
if(NULL == (accum->buf = H5FL_BLK_REALLOC(meta_accum, accum->buf, tmp_size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate metadata accumulator buffer")
/* Note the new buffer size */
accum->alloc_size = tmp_size;
} /* end if */
} /* end else */
/* Update the metadata accumulator information */
accum->loc = addr;
accum->size = size;
/* Store the piece of metadata in the accumulator */
H5MM_memcpy(accum->buf, buf, size);
/* Adjust the dirty region and mark accumulator dirty */
accum->dirty_off = 0;
accum->dirty_len = size;
accum->dirty = TRUE;
} /* end else */
} /* end if */
/* No metadata in the accumulator, grab this piece and keep it */
else {
/* Check if we need to reallocate the buffer */
if(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 + H5VM_log2_gen((uint64_t)(size - 1)));
/* Reallocate the metadata accumulator buffer */
if(NULL == (accum->buf = H5FL_BLK_REALLOC(meta_accum, accum->buf, new_size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate metadata accumulator buffer")
/* Note the new buffer size */
accum->alloc_size = new_size;
/* Clear the memory */
HDmemset(accum->buf + size, 0, (accum->alloc_size - size));
} /* end if */
/* Update the metadata accumulator information */
accum->loc = addr;
accum->size = size;
/* Store the piece of metadata in the accumulator */
H5MM_memcpy(accum->buf, buf, size);
/* Adjust the dirty region and mark accumulator dirty */
accum->dirty_off = 0;
accum->dirty_len = size;
accum->dirty = TRUE;
} /* end else */
} /* end if */
else {
/* Make certain that data in accumulator is visible before new write */
if((H5F_SHARED_INTENT(f_sh) & H5F_ACC_SWMR_WRITE) > 0)
/* Flush if dirty and reset accumulator */
if(H5F__accum_reset(f_sh, TRUE) < 0)
HGOTO_ERROR(H5E_IO, H5E_CANTRESET, FAIL, "can't reset accumulator")
/* Write the data */
if(H5FD_write(file, map_type, addr, size, buf) < 0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
/* Check for overlap w/accumulator */
/* (Note that this could be improved by updating the accumulator
* with [some of] the information just read in. -QAK)
*/
if(H5F_addr_overlap(addr, size, accum->loc, accum->size)) {
/* Check for write starting before beginning of accumulator */
if(H5F_addr_le(addr, accum->loc)) {
/* Check for write ending within accumulator */
if(H5F_addr_le(addr + size, accum->loc + accum->size)) {
size_t overlap_size; /* Size of overlapping region */
/* Compute overlap size */
overlap_size = (size_t)((addr + size) - accum->loc);
/* Check for dirty region */
if(accum->dirty) {
haddr_t dirty_start = accum->loc + accum->dirty_off; /* File address of start of dirty region */
haddr_t dirty_end = dirty_start + accum->dirty_len; /* File address of end of dirty region */
/* Check if entire dirty region is overwritten */
if(H5F_addr_le(dirty_end, addr + size)) {
accum->dirty = FALSE;
accum->dirty_len = 0;
} /* end if */
else {
/* Check for dirty region falling after write */
if(H5F_addr_le(addr + size, dirty_start))
accum->dirty_off = overlap_size;
else { /* Dirty region overlaps w/written region */
accum->dirty_off = 0;
accum->dirty_len -= (size_t)((addr + size) - dirty_start);
} /* end else */
} /* end if */
} /* end if */
/* Trim bottom of accumulator off */
accum->loc += overlap_size;
accum->size -= overlap_size;
HDmemmove(accum->buf, accum->buf + overlap_size, accum->size);
} /* end if */
else { /* Access covers whole accumulator */
/* Reset accumulator, but don't flush */
if(H5F__accum_reset(f_sh, FALSE) < 0)
HGOTO_ERROR(H5E_IO, H5E_CANTRESET, FAIL, "can't reset accumulator")
} /* end else */
} /* end if */
else { /* Write starts after beginning of accumulator */
size_t overlap_size; /* Size of overlapping region */
/* Sanity check */
HDassert(H5F_addr_gt(addr + size, accum->loc + accum->size));
/* Compute overlap size */
overlap_size = (size_t)((accum->loc + accum->size) - addr);
/* Check for dirty region */
if(accum->dirty) {
haddr_t dirty_start = accum->loc + accum->dirty_off; /* File address of start of dirty region */
haddr_t dirty_end = dirty_start + accum->dirty_len; /* File address of end of dirty region */
/* Check if entire dirty region is overwritten */
if(H5F_addr_ge(dirty_start, addr)) {
accum->dirty = FALSE;
accum->dirty_len = 0;
} /* end if */
else {
/* Check for dirty region falling before write */
if(H5F_addr_le(dirty_end, addr))
; /* noop */
else /* Dirty region overlaps w/written region */
accum->dirty_len = (size_t)(addr - dirty_start);
} /* end if */
} /* end if */
/* Trim top of accumulator off */
accum->size -= overlap_size;
} /* end else */
} /* end if */
} /* end else */
} /* end if */
else {
/* Write the data */
if(H5FD_write(file, map_type, addr, size, buf) < 0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
} /* end else */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F__accum_write() */
/*-------------------------------------------------------------------------
* Function: H5F__accum_free
*
* Purpose: Check for free space invalidating [part of] a metadata
* accumulator.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Jan 10 2008
*
*-------------------------------------------------------------------------
*/
herr_t
H5F__accum_free(H5F_shared_t *f_sh, H5FD_mem_t H5_ATTR_UNUSED type, haddr_t addr,
hsize_t size)
{
H5F_meta_accum_t *accum; /* Alias for file's metadata accumulator */
H5FD_t *file; /* File driver pointer */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_PACKAGE
/* check arguments */
HDassert(f_sh);
/* Set up alias for file's metadata accumulator info */
accum = &f_sh->accum;
/* Translate to file driver pointer */
file = f_sh->lf;
/* Adjust the metadata accumulator to remove the freed block, if it overlaps */
if((f_sh->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA)
&& H5F_addr_overlap(addr, size, accum->loc, accum->size)) {
size_t overlap_size; /* Size of overlap with accumulator */
/* Sanity check */
/* (The metadata accumulator should not intersect w/raw data */
HDassert(H5FD_MEM_DRAW != type);
HDassert(H5FD_MEM_GHEAP != type); /* (global heap data is being treated as raw data currently) */
/* Check for overlapping the beginning of the accumulator */
if(H5F_addr_le(addr, accum->loc)) {
/* Check for completely overlapping the accumulator */
if(H5F_addr_ge(addr + size, accum->loc + accum->size)) {
/* Reset the accumulator, but don't free buffer */
accum->loc = HADDR_UNDEF;
accum->size = 0;
accum->dirty = FALSE;
} /* end if */
/* Block to free must end within the accumulator */
else {
size_t new_accum_size; /* Size of new accumulator buffer */
/* Calculate the size of the overlap with the accumulator, etc. */
H5_CHECKED_ASSIGN(overlap_size, size_t, (addr + size) - accum->loc, haddr_t);
new_accum_size = accum->size - overlap_size;
/* Move the accumulator buffer information to eliminate the freed block */
HDmemmove(accum->buf, accum->buf + overlap_size, new_accum_size);
/* Adjust the accumulator information */
accum->loc += overlap_size;
accum->size = new_accum_size;
/* Adjust the dirty region and possibly mark accumulator clean */
if(accum->dirty) {
/* Check if block freed is entirely before dirty region */
if(overlap_size < accum->dirty_off)
accum->dirty_off -= overlap_size;
else {
/* Check if block freed ends within dirty region */
if(overlap_size < (accum->dirty_off + accum->dirty_len)) {
accum->dirty_len = (accum->dirty_off + accum->dirty_len) - overlap_size;
accum->dirty_off = 0;
} /* end if */
/* Block freed encompasses dirty region */
else
accum->dirty = FALSE;
} /* end else */
} /* end if */
} /* end else */
} /* end if */
/* Block to free must start within the accumulator */
else {
haddr_t dirty_end = accum->loc + accum->dirty_off + accum->dirty_len;
haddr_t dirty_start = accum->loc + accum->dirty_off;
/* Calculate the size of the overlap with the accumulator */
H5_CHECKED_ASSIGN(overlap_size, size_t, (accum->loc + accum->size) - addr, haddr_t);
/* Check if block to free begins before end of dirty region */
if(accum->dirty && H5F_addr_lt(addr, dirty_end)) {
haddr_t tail_addr;
/* Calculate the address of the tail to write */
tail_addr = addr + size;
/* Check if the block to free begins before dirty region */
if(H5F_addr_lt(addr, dirty_start)) {
/* Check if block to free is entirely before dirty region */
if(H5F_addr_le(tail_addr, dirty_start)) {
/* Write out the entire dirty region of the accumulator */
if(H5FD_write(file, H5FD_MEM_DEFAULT, dirty_start, accum->dirty_len, accum->buf + accum->dirty_off) < 0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
} /* end if */
/* Block to free overlaps with some/all of dirty region */
/* Check for unfreed dirty region to write */
else if(H5F_addr_lt(tail_addr, dirty_end)) {
size_t write_size;
size_t dirty_delta;
write_size = (size_t)(dirty_end - tail_addr);
dirty_delta = accum->dirty_len - write_size;
HDassert(write_size > 0);
/* Write out the unfreed dirty region of the accumulator */
if(H5FD_write(file, H5FD_MEM_DEFAULT, dirty_start + dirty_delta, write_size, accum->buf + accum->dirty_off + dirty_delta) < 0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
} /* end if */
/* Reset dirty flag */
accum->dirty = FALSE;
} /* end if */
/* Block to free begins at beginning of or in middle of dirty region */
else {
/* Check if block to free ends before end of dirty region */
if(H5F_addr_lt(tail_addr, dirty_end)) {
size_t write_size;
size_t dirty_delta;
write_size = (size_t)(dirty_end - tail_addr);
dirty_delta = accum->dirty_len - write_size;
HDassert(write_size > 0);
/* Write out the unfreed end of the dirty region of the accumulator */
if(H5FD_write(file, H5FD_MEM_DEFAULT, dirty_start + dirty_delta, write_size, accum->buf + accum->dirty_off + dirty_delta) < 0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
} /* end if */
/* Check for block to free beginning at same location as dirty region */
if(H5F_addr_eq(addr, dirty_start)) {
/* Reset dirty flag */
accum->dirty = FALSE;
} /* end if */
/* Block to free eliminates end of dirty region */
else {
accum->dirty_len = (size_t)(addr - dirty_start);
} /* end else */
} /* end else */
} /* end if */
/* Adjust the accumulator information */
accum->size = accum->size - overlap_size;
} /* end else */
} /* end if */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F__accum_free() */
/*-------------------------------------------------------------------------
* Function: H5F__accum_flush
*
* Purpose: Flush the metadata accumulator to the file
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Jan 10 2008
*
*-------------------------------------------------------------------------
*/
herr_t
H5F__accum_flush(H5F_shared_t *f_sh)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Sanity checks */
HDassert(f_sh);
/* Check if we need to flush out the metadata accumulator */
if((f_sh->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) && f_sh->accum.dirty) {
H5FD_t *file; /* File driver pointer */
/* Translate to file driver pointer */
file = f_sh->lf;
/* Flush the metadata contents */
if(H5FD_write(file, H5FD_MEM_DEFAULT, f_sh->accum.loc + f_sh->accum.dirty_off, f_sh->accum.dirty_len, f_sh->accum.buf + f_sh->accum.dirty_off) < 0)
HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
/* Reset the dirty flag */
f_sh->accum.dirty = FALSE;
} /* end if */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F__accum_flush() */
/*-------------------------------------------------------------------------
* Function: H5F__accum_reset
*
* Purpose: Reset the metadata accumulator for the file
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Jan 10 2008
*
*-------------------------------------------------------------------------
*/
herr_t
H5F__accum_reset(H5F_shared_t *f_sh, hbool_t flush)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_PACKAGE
/* Sanity checks */
HDassert(f_sh);
/* Flush any dirty data in accumulator, if requested */
if(flush)
if(H5F__accum_flush(f_sh) < 0)
HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "can't flush metadata accumulator")
/* Check if we need to reset the metadata accumulator information */
if(f_sh->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) {
/* Free the buffer */
if(f_sh->accum.buf)
f_sh->accum.buf = H5FL_BLK_FREE(meta_accum, f_sh->accum.buf);
/* Reset the buffer sizes & location */
f_sh->accum.alloc_size = f_sh->accum.size = 0;
f_sh->accum.loc = HADDR_UNDEF;
f_sh->accum.dirty = FALSE;
f_sh->accum.dirty_len = 0;
} /* end if */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5F__accum_reset() */
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