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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "adio.h"
#include "adio_extern.h"
#define ADIOI_BUFFERED_WRITE \
{ \
if (req_off >= writebuf_off + writebuf_len) { \
if (writebuf_len) { \
ADIO_WriteContig(fd, writebuf, writebuf_len, MPI_BYTE, \
ADIO_EXPLICIT_OFFSET, writebuf_off, &status1, error_code); \
if (!fd->atomicity && fd->hints->ds_write == ADIOI_HINT_DISABLE) \
ADIOI_UNLOCK(fd, writebuf_off, SEEK_SET, writebuf_len); \
if (*error_code != MPI_SUCCESS) { \
*error_code = MPIO_Err_create_code(*error_code, \
MPIR_ERR_RECOVERABLE, myname, \
__LINE__, MPI_ERR_IO, \
"**iowswc", 0); \
goto fn_exit; \
} \
} \
writebuf_off = req_off; \
writebuf_len = (unsigned) (MPL_MIN(max_bufsize,end_offset-writebuf_off+1)); \
if (!fd->atomicity && fd->hints->ds_write == ADIOI_HINT_DISABLE) \
ADIOI_WRITE_LOCK(fd, writebuf_off, SEEK_SET, writebuf_len); \
ADIO_ReadContig(fd, writebuf, writebuf_len, MPI_BYTE, \
ADIO_EXPLICIT_OFFSET, writebuf_off, &status1, error_code); \
if (*error_code != MPI_SUCCESS) { \
*error_code = MPIO_Err_create_code(*error_code, \
MPIR_ERR_RECOVERABLE, myname, \
__LINE__, MPI_ERR_IO, \
"**iowsrc", 0); \
goto fn_exit; \
} \
} \
write_sz = (unsigned) (MPL_MIN(req_len, writebuf_off + writebuf_len - req_off)); \
ADIOI_Assert((ADIO_Offset)write_sz == MPL_MIN(req_len, writebuf_off + writebuf_len - req_off)); \
memcpy(writebuf+req_off-writebuf_off, (char *)buf +userbuf_off, write_sz); \
while (write_sz != req_len) { \
ADIO_WriteContig(fd, writebuf, writebuf_len, MPI_BYTE, \
ADIO_EXPLICIT_OFFSET, writebuf_off, &status1, error_code); \
if (!fd->atomicity && fd->hints->ds_write == ADIOI_HINT_DISABLE) \
ADIOI_UNLOCK(fd, writebuf_off, SEEK_SET, writebuf_len); \
if (*error_code != MPI_SUCCESS) { \
*error_code = MPIO_Err_create_code(*error_code, \
MPIR_ERR_RECOVERABLE, myname, \
__LINE__, MPI_ERR_IO, \
"**iowswc", 0); \
goto fn_exit; \
} \
req_len -= write_sz; \
userbuf_off += write_sz; \
writebuf_off += writebuf_len; \
writebuf_len = (unsigned) (MPL_MIN(max_bufsize,end_offset-writebuf_off+1)); \
if (!fd->atomicity && fd->hints->ds_write == ADIOI_HINT_DISABLE) \
ADIOI_WRITE_LOCK(fd, writebuf_off, SEEK_SET, writebuf_len); \
ADIO_ReadContig(fd, writebuf, writebuf_len, MPI_BYTE, \
ADIO_EXPLICIT_OFFSET, writebuf_off, &status1, error_code); \
if (*error_code != MPI_SUCCESS) { \
*error_code = MPIO_Err_create_code(*error_code, \
MPIR_ERR_RECOVERABLE, myname, \
__LINE__, MPI_ERR_IO, \
"**iowsrc", 0); \
goto fn_exit; \
} \
write_sz = MPL_MIN(req_len, writebuf_len); \
memcpy(writebuf, (char *)buf + userbuf_off, write_sz); \
} \
}
/* this macro is used when filetype is contig and buftype is not contig.
it does not do a read-modify-write and does not lock*/
#define ADIOI_BUFFERED_WRITE_WITHOUT_READ \
{ \
if (req_off >= writebuf_off + writebuf_len) { \
ADIO_WriteContig(fd, writebuf, writebuf_len, MPI_BYTE, \
ADIO_EXPLICIT_OFFSET, writebuf_off, &status1, error_code); \
if (*error_code != MPI_SUCCESS) { \
*error_code = MPIO_Err_create_code(*error_code, \
MPIR_ERR_RECOVERABLE, myname, \
__LINE__, MPI_ERR_IO, \
"**iowswc", 0); \
goto fn_exit; \
} \
writebuf_off = req_off; \
writebuf_len = (unsigned) (MPL_MIN(max_bufsize,end_offset-writebuf_off+1)); \
} \
write_sz = (unsigned) (MPL_MIN(req_len, writebuf_off + writebuf_len - req_off)); \
ADIOI_Assert((ADIO_Offset)write_sz == MPL_MIN(req_len, writebuf_off + writebuf_len - req_off)); \
memcpy(writebuf+req_off-writebuf_off, (char *)buf +userbuf_off, write_sz); \
while (write_sz != req_len) { \
ADIO_WriteContig(fd, writebuf, writebuf_len, MPI_BYTE, \
ADIO_EXPLICIT_OFFSET, writebuf_off, &status1, error_code); \
if (*error_code != MPI_SUCCESS) { \
*error_code = MPIO_Err_create_code(*error_code, \
MPIR_ERR_RECOVERABLE, myname, \
__LINE__, MPI_ERR_IO, \
"**iowswc", 0); \
goto fn_exit; \
} \
req_len -= write_sz; \
userbuf_off += write_sz; \
writebuf_off += writebuf_len; \
writebuf_len = (unsigned) (MPL_MIN(max_bufsize,end_offset-writebuf_off+1)); \
write_sz = MPL_MIN(req_len, writebuf_len); \
memcpy(writebuf, (char *)buf + userbuf_off, write_sz); \
} \
}
void ADIOI_GEN_WriteStrided(ADIO_File fd, const void *buf, int count,
MPI_Datatype datatype, int file_ptr_type,
ADIO_Offset offset, ADIO_Status * status, int
*error_code)
{
/* offset is in units of etype relative to the filetype. */
ADIOI_Flatlist_node *flat_buf, *flat_file;
ADIO_Offset i_offset, sum, size_in_filetype;
int i, j, k, st_index = 0;
ADIO_Offset num, size, n_filetypes, etype_in_filetype, st_n_filetypes;
ADIO_Offset n_etypes_in_filetype, abs_off_in_filetype = 0;
MPI_Count filetype_size, etype_size, buftype_size;
MPI_Aint lb, filetype_extent, buftype_extent;
int buf_count, buftype_is_contig, filetype_is_contig;
ADIO_Offset userbuf_off;
ADIO_Offset off, req_off, disp, end_offset = 0, writebuf_off, start_off;
char *writebuf = NULL;
unsigned writebuf_len, max_bufsize, write_sz;
MPI_Aint bufsize;
ADIO_Status status1;
ADIO_Offset new_bwr_size, new_fwr_size, st_fwr_size, fwr_size = 0, bwr_size, req_len;
static char myname[] = "ADIOI_GEN_WriteStrided";
if (fd->hints->ds_write == ADIOI_HINT_DISABLE) {
/* if user has disabled data sieving on reads, use naive
* approach instead.
*/
ADIOI_GEN_WriteStrided_naive(fd,
buf,
count, datatype, file_ptr_type, offset, status, error_code);
return;
}
*error_code = MPI_SUCCESS; /* changed below if error */
ADIOI_Datatype_iscontig(datatype, &buftype_is_contig);
ADIOI_Datatype_iscontig(fd->filetype, &filetype_is_contig);
MPI_Type_size_x(fd->filetype, &filetype_size);
if (!filetype_size) {
#ifdef HAVE_STATUS_SET_BYTES
MPIR_Status_set_bytes(status, datatype, 0);
#endif
*error_code = MPI_SUCCESS;
return;
}
MPI_Type_get_extent(fd->filetype, &lb, &filetype_extent);
MPI_Type_size_x(datatype, &buftype_size);
MPI_Type_get_extent(datatype, &lb, &buftype_extent);
etype_size = fd->etype_size;
ADIOI_Assert((buftype_size * count) == ((MPI_Count) buftype_size * (ADIO_Offset) count));
bufsize = buftype_size * count;
/* get max_bufsize from the info object. */
max_bufsize = fd->hints->ind_wr_buffer_size;
if (!buftype_is_contig && filetype_is_contig) {
/* noncontiguous in memory, contiguous in file. */
flat_buf = ADIOI_Flatten_and_find(datatype);
off = (file_ptr_type == ADIO_INDIVIDUAL) ? fd->fp_ind :
fd->disp + (ADIO_Offset) etype_size *offset;
start_off = off;
end_offset = off + bufsize - 1;
writebuf_off = off;
writebuf = (char *) ADIOI_Malloc(max_bufsize);
writebuf_len = (unsigned) (MPL_MIN(max_bufsize, end_offset - writebuf_off + 1));
/* if atomicity is true or data sieving is not disable, lock the region
* to be accessed */
if (fd->atomicity || fd->hints->ds_write != ADIOI_HINT_DISABLE)
ADIOI_WRITE_LOCK(fd, start_off, SEEK_SET, end_offset - start_off + 1);
for (j = 0; j < count; j++) {
for (i = 0; i < flat_buf->count; i++) {
userbuf_off = (ADIO_Offset) j *(ADIO_Offset) buftype_extent + flat_buf->indices[i];
req_off = off;
req_len = flat_buf->blocklens[i];
ADIOI_BUFFERED_WRITE_WITHOUT_READ;
off += flat_buf->blocklens[i];
}
}
/* write the buffer out finally */
if (writebuf_len) {
ADIO_WriteContig(fd, writebuf, writebuf_len, MPI_BYTE, ADIO_EXPLICIT_OFFSET,
writebuf_off, &status1, error_code);
}
if (fd->atomicity || fd->hints->ds_write != ADIOI_HINT_DISABLE)
ADIOI_UNLOCK(fd, start_off, SEEK_SET, end_offset - start_off + 1);
if (*error_code != MPI_SUCCESS)
goto fn_exit;
if (file_ptr_type == ADIO_INDIVIDUAL)
fd->fp_ind = off;
}
else { /* noncontiguous in file */
flat_file = ADIOI_Flatten_and_find(fd->filetype);
disp = fd->disp;
if (file_ptr_type == ADIO_INDIVIDUAL) {
/* Wei-keng reworked type processing to be a bit more efficient */
offset = fd->fp_ind - disp;
n_filetypes = (offset - flat_file->indices[0]) / filetype_extent;
offset -= (ADIO_Offset) n_filetypes *filetype_extent;
/* now offset is local to this extent */
/* find the block where offset is located, skip blocklens[i]==0 */
for (i = 0; i < flat_file->count; i++) {
ADIO_Offset dist;
if (flat_file->blocklens[i] == 0)
continue;
dist = flat_file->indices[i] + flat_file->blocklens[i] - offset;
/* fwr_size is from offset to the end of block i */
if (dist == 0) {
i++;
offset = flat_file->indices[i];
fwr_size = flat_file->blocklens[i];
break;
}
if (dist > 0) {
fwr_size = dist;
break;
}
}
st_index = i; /* starting index in flat_file->indices[] */
offset += disp + (ADIO_Offset) n_filetypes *filetype_extent;
} else {
n_etypes_in_filetype = filetype_size / etype_size;
n_filetypes = offset / n_etypes_in_filetype;
etype_in_filetype = offset % n_etypes_in_filetype;
size_in_filetype = etype_in_filetype * etype_size;
sum = 0;
for (i = 0; i < flat_file->count; i++) {
sum += flat_file->blocklens[i];
if (sum > size_in_filetype) {
st_index = i;
fwr_size = sum - size_in_filetype;
abs_off_in_filetype = flat_file->indices[i] +
size_in_filetype - (sum - flat_file->blocklens[i]);
break;
}
}
/* abs. offset in bytes in the file */
offset = disp + (ADIO_Offset) n_filetypes *filetype_extent + abs_off_in_filetype;
}
start_off = offset;
/* Wei-keng Liao:write request is within single flat_file contig block */
/* this could happen, for example, with subarray types that are
* actually fairly contiguous */
if (buftype_is_contig && bufsize <= fwr_size) {
/* though MPI api has an integer 'count' parameter, derived
* datatypes might describe more bytes than can fit into an integer.
* if we've made it this far, we can pass a count of original
* datatypes, instead of a count of bytes (which might overflow)
* Other WriteContig calls in this path are operating on data
* sieving buffer */
ADIOI_WRITE_LOCK(fd, offset, SEEK_SET, bufsize);
ADIO_WriteContig(fd, buf, count, datatype, ADIO_EXPLICIT_OFFSET,
offset, status, error_code);
ADIOI_UNLOCK(fd, offset, SEEK_SET, bufsize);
if (file_ptr_type == ADIO_INDIVIDUAL) {
/* update MPI-IO file pointer to point to the first byte
* that can be accessed in the fileview. */
fd->fp_ind = offset + bufsize;
if (bufsize == fwr_size) {
do {
st_index++;
if (st_index == flat_file->count) {
st_index = 0;
n_filetypes++;
}
} while (flat_file->blocklens[st_index] == 0);
fd->fp_ind = disp + flat_file->indices[st_index]
+ (ADIO_Offset) n_filetypes *filetype_extent;
}
}
fd->fp_sys_posn = -1; /* set it to null. */
#ifdef HAVE_STATUS_SET_BYTES
MPIR_Status_set_bytes(status, datatype, bufsize);
#endif
goto fn_exit;
}
/* Calculate end_offset, the last byte-offset that will be accessed.
* e.g., if start_offset=0 and 100 bytes to be write, end_offset=99 */
st_fwr_size = fwr_size;
st_n_filetypes = n_filetypes;
i_offset = 0;
j = st_index;
off = offset;
fwr_size = MPL_MIN(st_fwr_size, bufsize);
while (i_offset < bufsize) {
i_offset += fwr_size;
end_offset = off + fwr_size - 1;
j = (j + 1) % flat_file->count;
n_filetypes += (j == 0) ? 1 : 0;
while (flat_file->blocklens[j] == 0) {
j = (j + 1) % flat_file->count;
n_filetypes += (j == 0) ? 1 : 0;
}
off = disp + flat_file->indices[j] + n_filetypes * (ADIO_Offset) filetype_extent;
fwr_size = MPL_MIN(flat_file->blocklens[j], bufsize - i_offset);
}
/* if atomicity is true or data sieving is not disable, lock the region
* to be accessed */
if (fd->atomicity || fd->hints->ds_write != ADIOI_HINT_DISABLE)
ADIOI_WRITE_LOCK(fd, start_off, SEEK_SET, end_offset - start_off + 1);
writebuf_off = 0;
writebuf_len = 0;
writebuf = (char *) ADIOI_Malloc(max_bufsize);
memset(writebuf, -1, max_bufsize);
if (buftype_is_contig && !filetype_is_contig) {
/* contiguous in memory, noncontiguous in file. should be the most
common case. */
i_offset = 0;
j = st_index;
off = offset;
n_filetypes = st_n_filetypes;
fwr_size = MPL_MIN(st_fwr_size, bufsize);
while (i_offset < bufsize) {
if (fwr_size) {
/* TYPE_UB and TYPE_LB can result in
* fwr_size = 0. save system call in such cases */
/* lseek(fd->fd_sys, off, SEEK_SET);
* err = write(fd->fd_sys, ((char *) buf) + i_offset, fwr_size); */
req_off = off;
req_len = fwr_size;
userbuf_off = i_offset;
ADIOI_BUFFERED_WRITE;
}
i_offset += fwr_size;
if (off + fwr_size < disp + flat_file->indices[j] +
flat_file->blocklens[j] + n_filetypes * (ADIO_Offset) filetype_extent)
off += fwr_size;
/* did not reach end of contiguous block in filetype.
* no more I/O needed. off is incremented by fwr_size. */
else {
j = (j + 1) % flat_file->count;
n_filetypes += (j == 0) ? 1 : 0;
while (flat_file->blocklens[j] == 0) {
j = (j + 1) % flat_file->count;
n_filetypes += (j == 0) ? 1 : 0;
}
off = disp + flat_file->indices[j] +
n_filetypes * (ADIO_Offset) filetype_extent;
fwr_size = MPL_MIN(flat_file->blocklens[j], bufsize - i_offset);
}
}
} else {
/* noncontiguous in memory as well as in file */
flat_buf = ADIOI_Flatten_and_find(datatype);
k = num = buf_count = 0;
i_offset = flat_buf->indices[0];
j = st_index;
off = offset;
n_filetypes = st_n_filetypes;
fwr_size = st_fwr_size;
bwr_size = flat_buf->blocklens[0];
while (num < bufsize) {
size = MPL_MIN(fwr_size, bwr_size);
if (size) {
/* lseek(fd->fd_sys, off, SEEK_SET);
* err = write(fd->fd_sys, ((char *) buf) + i_offset, size); */
req_off = off;
req_len = size;
userbuf_off = i_offset;
ADIOI_BUFFERED_WRITE;
}
new_fwr_size = fwr_size;
new_bwr_size = bwr_size;
if (size == fwr_size) {
/* reached end of contiguous block in file */
j = (j + 1) % flat_file->count;
n_filetypes += (j == 0) ? 1 : 0;
while (flat_file->blocklens[j] == 0) {
j = (j + 1) % flat_file->count;
n_filetypes += (j == 0) ? 1 : 0;
}
off = disp + flat_file->indices[j] +
n_filetypes * (ADIO_Offset) filetype_extent;
new_fwr_size = flat_file->blocklens[j];
if (size != bwr_size) {
i_offset += size;
new_bwr_size -= size;
}
}
if (size == bwr_size) {
/* reached end of contiguous block in memory */
k = (k + 1) % flat_buf->count;
buf_count++;
i_offset =
(ADIO_Offset) buftype_extent *(ADIO_Offset) (buf_count / flat_buf->count) +
flat_buf->indices[k];
new_bwr_size = flat_buf->blocklens[k];
if (size != fwr_size) {
off += size;
new_fwr_size -= size;
}
}
num += size;
fwr_size = new_fwr_size;
bwr_size = new_bwr_size;
}
}
/* write the buffer out finally */
if (writebuf_len) {
ADIO_WriteContig(fd, writebuf, writebuf_len, MPI_BYTE, ADIO_EXPLICIT_OFFSET,
writebuf_off, &status1, error_code);
if (!fd->atomicity && fd->hints->ds_write == ADIOI_HINT_DISABLE)
ADIOI_UNLOCK(fd, writebuf_off, SEEK_SET, writebuf_len);
if (*error_code != MPI_SUCCESS)
goto fn_exit;
}
if (fd->atomicity || fd->hints->ds_write != ADIOI_HINT_DISABLE)
ADIOI_UNLOCK(fd, start_off, SEEK_SET, end_offset - start_off + 1);
if (file_ptr_type == ADIO_INDIVIDUAL)
fd->fp_ind = off;
}
fd->fp_sys_posn = -1; /* set it to null. */
#ifdef HAVE_STATUS_SET_BYTES
/* datatypes returning negagive values, probably related to tt 1893 */
MPIR_Status_set_bytes(status, datatype, bufsize);
/* This is a temporary way of filling in status. The right way is to
keep track of how much data was actually written by ADIOI_BUFFERED_WRITE. */
#endif
fn_exit:
if (writebuf != NULL)
ADIOI_Free(writebuf);
}
|
