1090 lines
49 KiB
C
1090 lines
49 KiB
C
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by The HDF Group. *
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* Copyright by the Board of Trustees of the University of Illinois. *
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* All rights reserved. *
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* *
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* This file is part of HDF5. The full HDF5 copyright notice, including *
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* terms governing use, modification, and redistribution, is contained in *
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* the COPYING file, which can be found at the root of the source code *
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* distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
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* If you do not have access to either file, you may request a copy from *
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* help@hdfgroup.org. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/*-------------------------------------------------------------------------
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*
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* Created: H5Faccum.c
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* Jan 10 2008
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* Quincey Koziol
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*
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* Purpose: File metadata "accumulator" routines. (Used to
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* cache small metadata I/Os and group them into a
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* single larger I/O)
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*
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*-------------------------------------------------------------------------
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*/
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/****************/
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/* Module Setup */
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/****************/
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#include "H5Fmodule.h" /* This source code file is part of the H5F module */
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/***********/
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/* Headers */
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/***********/
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#include "H5private.h" /* Generic Functions */
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#include "H5Eprivate.h" /* Error handling */
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#include "H5Fpkg.h" /* File access */
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#include "H5FDprivate.h" /* File drivers */
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#include "H5MMprivate.h" /* Memory management */
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#include "H5VMprivate.h" /* Vectors and arrays */
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/****************/
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/* Local Macros */
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/****************/
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/* Metadata accumulator controls */
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#define H5F_ACCUM_THROTTLE 8
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#define H5F_ACCUM_THRESHOLD 2048
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#define H5F_ACCUM_MAX_SIZE (1024 * 1024) /* Max. accum. buf size (max. I/Os will be 1/2 this size) */
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/******************/
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/* Local Typedefs */
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/******************/
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/* Enumerated type to indicate how data will be added to accumulator */
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typedef enum {
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H5F_ACCUM_PREPEND, /* Data will be prepended to accumulator */
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H5F_ACCUM_APPEND /* Data will be appended to accumulator */
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} H5F_accum_adjust_t;
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/********************/
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/* Package Typedefs */
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/********************/
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/********************/
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/* Local Prototypes */
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/********************/
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/*********************/
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/* Package Variables */
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/*********************/
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/*****************************/
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/* Library Private Variables */
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/*****************************/
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/*******************/
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/* Local Variables */
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/*******************/
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/* Declare a PQ free list to manage the metadata accumulator buffer */
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H5FL_BLK_DEFINE_STATIC(meta_accum);
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/*-------------------------------------------------------------------------
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* Function: H5F__accum_read
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*
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* Purpose: Attempts to read some data from the metadata accumulator for
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* a file into a buffer.
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*
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* Note: We can't change (or add to) the metadata accumulator, because
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* this might be a speculative read and could possibly read raw
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* data into the metadata accumulator.
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*
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* Return: Non-negative on success/Negative on failure
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*
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* Programmer: Quincey Koziol
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* Jan 10 2008
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*
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*-------------------------------------------------------------------------
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*/
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herr_t
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H5F__accum_read(H5F_shared_t *f_sh, H5FD_mem_t map_type, haddr_t addr, size_t size, void *buf /*out*/)
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{
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H5FD_t *file; /* File driver pointer */
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herr_t ret_value = SUCCEED; /* Return value */
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FUNC_ENTER_PACKAGE
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/* Sanity checks */
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HDassert(f_sh);
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HDassert(buf);
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/* Translate to file driver I/O info object */
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file = f_sh->lf;
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/* Check if this information is in the metadata accumulator */
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if ((f_sh->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) && map_type != H5FD_MEM_DRAW) {
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H5F_meta_accum_t *accum; /* Alias for file's metadata accumulator */
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/* Set up alias for file's metadata accumulator info */
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accum = &f_sh->accum;
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if (size < H5F_ACCUM_MAX_SIZE) {
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/* Sanity check */
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HDassert(!accum->buf || (accum->alloc_size >= accum->size));
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/* Current read adjoins or overlaps with metadata accumulator */
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if (H5F_addr_overlap(addr, size, accum->loc, accum->size) || ((addr + size) == accum->loc) ||
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(accum->loc + accum->size) == addr) {
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size_t amount_before; /* Amount to read before current accumulator */
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haddr_t new_addr; /* New address of the accumulator buffer */
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size_t new_size; /* New size of the accumulator buffer */
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/* Compute new values for accumulator */
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new_addr = MIN(addr, accum->loc);
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new_size = (size_t)(MAX((addr + size), (accum->loc + accum->size)) - new_addr);
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/* Check if we need more buffer space */
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if (new_size > accum->alloc_size) {
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size_t new_alloc_size; /* New size of accumulator */
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/* Adjust the buffer size to be a power of 2 that is large enough to hold data */
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new_alloc_size = (size_t)1 << (1 + H5VM_log2_gen((uint64_t)(new_size - 1)));
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/* Reallocate the metadata accumulator buffer */
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if (NULL == (accum->buf = H5FL_BLK_REALLOC(meta_accum, accum->buf, new_alloc_size)))
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HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL,
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"unable to allocate metadata accumulator buffer")
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/* Note the new buffer size */
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accum->alloc_size = new_alloc_size;
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/* Clear the memory */
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HDmemset(accum->buf + accum->size, 0, (accum->alloc_size - accum->size));
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} /* end if */
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/* Read the part before the metadata accumulator */
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if (addr < accum->loc) {
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/* Set the amount to read */
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H5_CHECKED_ASSIGN(amount_before, size_t, (accum->loc - addr), hsize_t);
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/* Make room for the metadata to read in */
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HDmemmove(accum->buf + amount_before, accum->buf, accum->size);
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/* Adjust dirty region tracking info, if present */
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if (accum->dirty)
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accum->dirty_off += amount_before;
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/* Dispatch to driver */
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if (H5FD_read(file, map_type, addr, amount_before, accum->buf) < 0)
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HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "driver read request failed")
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} /* end if */
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else
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amount_before = 0;
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/* Read the part after the metadata accumulator */
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if ((addr + size) > (accum->loc + accum->size)) {
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size_t amount_after; /* Amount to read at a time */
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/* Set the amount to read */
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H5_CHECKED_ASSIGN(amount_after, size_t, ((addr + size) - (accum->loc + accum->size)),
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hsize_t);
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/* Dispatch to driver */
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if (H5FD_read(file, map_type, (accum->loc + accum->size), amount_after,
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(accum->buf + accum->size + amount_before)) < 0)
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HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "driver read request failed")
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} /* end if */
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/* Copy the data out of the buffer */
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H5MM_memcpy(buf, accum->buf + (addr - new_addr), size);
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/* Adjust the accumulator address & size */
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accum->loc = new_addr;
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accum->size = new_size;
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} /* end if */
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/* Current read doesn't overlap with metadata accumulator, read it from file */
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else {
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/* Dispatch to driver */
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if (H5FD_read(file, map_type, addr, size, buf) < 0)
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HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "driver read request failed")
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} /* end else */
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} /* end if */
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else {
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/* Read the data */
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if (H5FD_read(file, map_type, addr, size, buf) < 0)
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HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "driver read request failed")
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/* Check for overlap w/dirty accumulator */
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/* (Note that this could be improved by updating the non-dirty
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* information in the accumulator with [some of] the information
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* just read in. -QAK)
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*/
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if (accum->dirty &&
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H5F_addr_overlap(addr, size, accum->loc + accum->dirty_off, accum->dirty_len)) {
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haddr_t dirty_loc = accum->loc + accum->dirty_off; /* File offset of dirty information */
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size_t buf_off; /* Offset of dirty region in buffer */
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size_t dirty_off; /* Offset within dirty region */
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size_t overlap_size; /* Size of overlap with dirty region */
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/* Check for read starting before beginning dirty region */
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if (H5F_addr_le(addr, dirty_loc)) {
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/* Compute offset of dirty region within buffer */
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buf_off = (size_t)(dirty_loc - addr);
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/* Compute offset within dirty region */
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dirty_off = 0;
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/* Check for read ending within dirty region */
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if (H5F_addr_lt(addr + size, dirty_loc + accum->dirty_len))
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overlap_size = (size_t)((addr + size) - buf_off);
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else /* Access covers whole dirty region */
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overlap_size = accum->dirty_len;
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} /* end if */
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else { /* Read starts after beginning of dirty region */
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/* Compute dirty offset within buffer and overlap size */
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buf_off = 0;
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dirty_off = (size_t)(addr - dirty_loc);
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overlap_size = (size_t)((dirty_loc + accum->dirty_len) - addr);
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} /* end else */
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/* Copy the dirty region to buffer */
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H5MM_memcpy((unsigned char *)buf + buf_off,
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(unsigned char *)accum->buf + accum->dirty_off + dirty_off, overlap_size);
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} /* end if */
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} /* end else */
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} /* end if */
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else {
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/* Read the data */
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if (H5FD_read(file, map_type, addr, size, buf) < 0)
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HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "driver read request failed")
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} /* end else */
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done:
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FUNC_LEAVE_NOAPI(ret_value)
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} /* end H5F__accum_read() */
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/*-------------------------------------------------------------------------
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* Function: H5F__accum_adjust
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*
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* Purpose: Adjust accumulator size, if necessary
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*
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* Return: Non-negative on success/Negative on failure
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*
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* Programmer: Quincey Koziol
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* Jun 11 2009
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*
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*-------------------------------------------------------------------------
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*/
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static herr_t
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H5F__accum_adjust(H5F_meta_accum_t *accum, H5FD_t *file, H5F_accum_adjust_t adjust, size_t size)
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{
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herr_t ret_value = SUCCEED; /* Return value */
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FUNC_ENTER_STATIC
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HDassert(accum);
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HDassert(file);
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HDassert(H5F_ACCUM_APPEND == adjust || H5F_ACCUM_PREPEND == adjust);
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HDassert(size > 0);
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HDassert(size <= H5F_ACCUM_MAX_SIZE);
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/* Check if we need more buffer space */
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if ((size + accum->size) > accum->alloc_size) {
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size_t new_size; /* New size of accumulator */
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/* Adjust the buffer size to be a power of 2 that is large enough to hold data */
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new_size = (size_t)1 << (1 + H5VM_log2_gen((uint64_t)((size + accum->size) - 1)));
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/* Check for accumulator getting too big */
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if (new_size > H5F_ACCUM_MAX_SIZE) {
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size_t shrink_size; /* Amount to shrink accumulator by */
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size_t remnant_size; /* Amount left in accumulator */
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/* Cap the accumulator's growth, leaving some room */
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/* Determine the amounts to work with */
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if (size > (H5F_ACCUM_MAX_SIZE / 2)) {
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new_size = H5F_ACCUM_MAX_SIZE;
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shrink_size = accum->size;
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remnant_size = 0;
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} /* end if */
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else {
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if (H5F_ACCUM_PREPEND == adjust) {
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new_size = (H5F_ACCUM_MAX_SIZE / 2);
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shrink_size = (H5F_ACCUM_MAX_SIZE / 2);
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remnant_size = accum->size - shrink_size;
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} /* end if */
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else {
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size_t adjust_size = size + accum->dirty_len;
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/* Check if we can slide the dirty region down, to accommodate the request */
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if (accum->dirty && (adjust_size <= H5F_ACCUM_MAX_SIZE)) {
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if ((ssize_t)(H5F_ACCUM_MAX_SIZE - (accum->dirty_off + adjust_size)) >=
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(ssize_t)(2 * size))
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shrink_size = accum->dirty_off / 2;
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else
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shrink_size = accum->dirty_off;
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remnant_size = accum->size - shrink_size;
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new_size = remnant_size + size;
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} /* end if */
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else {
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new_size = (H5F_ACCUM_MAX_SIZE / 2);
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shrink_size = (H5F_ACCUM_MAX_SIZE / 2);
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remnant_size = accum->size - shrink_size;
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} /* end else */
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} /* end else */
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} /* end else */
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/* Check if we need to flush accumulator data to file */
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if (accum->dirty) {
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/* Check whether to accumulator will be prepended or appended */
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if (H5F_ACCUM_PREPEND == adjust) {
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/* Check if the dirty region overlaps the region to eliminate from the accumulator */
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if ((accum->size - shrink_size) < (accum->dirty_off + accum->dirty_len)) {
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/* Write out the dirty region from the metadata accumulator, with dispatch to driver
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*/
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if (H5FD_write(file, H5FD_MEM_DEFAULT, (accum->loc + accum->dirty_off),
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accum->dirty_len, (accum->buf + accum->dirty_off)) < 0)
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HGOTO_ERROR(H5E_FILE, H5E_WRITEERROR, FAIL, "file write failed")
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/* Reset accumulator dirty flag */
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accum->dirty = FALSE;
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} /* end if */
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} /* end if */
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else {
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/* Check if the dirty region overlaps the region to eliminate from the accumulator */
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if (shrink_size > accum->dirty_off) {
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/* Write out the dirty region from the metadata accumulator, with dispatch to driver
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*/
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if (H5FD_write(file, H5FD_MEM_DEFAULT, (accum->loc + accum->dirty_off),
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accum->dirty_len, (accum->buf + accum->dirty_off)) < 0)
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HGOTO_ERROR(H5E_FILE, H5E_WRITEERROR, FAIL, "file write failed")
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/* Reset accumulator dirty flag */
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accum->dirty = FALSE;
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} /* end if */
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/* Adjust dirty region tracking info */
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accum->dirty_off -= shrink_size;
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} /* end else */
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} /* end if */
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/* Trim the accumulator's use of its buffer */
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accum->size = remnant_size;
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/* When appending, need to adjust location of accumulator */
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if (H5F_ACCUM_APPEND == adjust) {
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/* Move remnant of accumulator down */
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HDmemmove(accum->buf, (accum->buf + shrink_size), remnant_size);
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/* Adjust accumulator's location */
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accum->loc += shrink_size;
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} /* end if */
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} /* end if */
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/* Check for accumulator needing to be reallocated */
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if (new_size > accum->alloc_size) {
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unsigned char *new_buf; /* New buffer to hold the accumulated metadata */
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/* Reallocate the metadata accumulator buffer */
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if (NULL == (new_buf = H5FL_BLK_REALLOC(meta_accum, accum->buf, new_size)))
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HGOTO_ERROR(H5E_FILE, H5E_CANTALLOC, FAIL, "unable to allocate metadata accumulator buffer")
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/* Update accumulator info */
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accum->buf = new_buf;
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accum->alloc_size = new_size;
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/* Clear the memory */
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HDmemset(accum->buf + accum->size, 0, (accum->alloc_size - (accum->size + size)));
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} /* end if */
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} /* end if */
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done:
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FUNC_LEAVE_NOAPI(ret_value)
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} /* end H5F__accum_adjust() */
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/*-------------------------------------------------------------------------
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* Function: H5F__accum_write
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*
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* Purpose: Attempts to write some data to the metadata accumulator for
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* a file from a buffer.
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*
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* Return: Non-negative on success/Negative on failure
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*
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* Programmer: Quincey Koziol
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* Jan 10 2008
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*
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*-------------------------------------------------------------------------
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*/
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herr_t
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H5F__accum_write(H5F_shared_t *f_sh, H5FD_mem_t map_type, haddr_t addr, size_t size, const void *buf)
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{
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H5FD_t *file; /* File driver pointer */
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herr_t ret_value = SUCCEED; /* Return value */
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FUNC_ENTER_NOAPI(FAIL)
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/* Sanity checks */
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HDassert(f_sh);
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HDassert(H5F_SHARED_INTENT(f_sh) & H5F_ACC_RDWR);
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HDassert(buf);
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/* Translate to file driver pointer */
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file = f_sh->lf;
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/* Check for accumulating metadata */
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if ((f_sh->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) && map_type != H5FD_MEM_DRAW) {
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H5F_meta_accum_t *accum; /* Alias for file's metadata accumulator */
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/* Set up alias for file's metadata accumulator info */
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accum = &f_sh->accum;
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if (size < H5F_ACCUM_MAX_SIZE) {
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/* Sanity check */
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HDassert(!accum->buf || (accum->alloc_size >= accum->size));
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/* Check if there is already metadata in the accumulator */
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if (accum->size > 0) {
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/* Check if the new metadata adjoins the beginning of the current accumulator */
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if ((addr + size) == accum->loc) {
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/* Check if we need to adjust accumulator size */
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if (H5F__accum_adjust(accum, file, H5F_ACCUM_PREPEND, size) < 0)
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HGOTO_ERROR(H5E_IO, H5E_CANTRESIZE, FAIL, "can't adjust metadata accumulator")
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/* Move the existing metadata to the proper location */
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HDmemmove(accum->buf + size, accum->buf, accum->size);
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/* Copy the new metadata at the front */
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H5MM_memcpy(accum->buf, buf, size);
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/* Set the new size & location of the metadata accumulator */
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accum->loc = addr;
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accum->size += size;
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/* Adjust the dirty region and mark accumulator dirty */
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if (accum->dirty)
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accum->dirty_len = size + accum->dirty_off + accum->dirty_len;
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else {
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accum->dirty_len = size;
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accum->dirty = TRUE;
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} /* end else */
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accum->dirty_off = 0;
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} /* end if */
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/* Check if the new metadata adjoins the end of the current accumulator */
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else if (addr == (accum->loc + accum->size)) {
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/* Check if we need to adjust accumulator size */
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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
|
|
* 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
|
|
* 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
|
|
* 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() */
|