1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347
|
/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2011 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2008-2021 University of Houston. All rights reserved.
* Copyright (c) 2015-2018 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2023 NVIDIA Corporation. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "fbtl_posix.h"
#include "mpi.h"
#include <unistd.h>
#include <limits.h>
#ifdef HAVE_SYSLIMITS_H
#include <syslimits.h>
#endif /* HAVE_SYSLIMITS_H */
#include "ompi/constants.h"
#include "ompi/mca/fbtl/fbtl.h"
static ssize_t mca_fbtl_posix_pwritev_datasieving (ompio_file_t *fh, struct flock *lock, int *lock_counter );
static ssize_t mca_fbtl_posix_pwritev_generic (ompio_file_t *fh, struct flock *lock, int *lock_counter );
static ssize_t mca_fbtl_posix_pwritev_single (ompio_file_t *fh, struct flock *lock, int *lock_counter );
#ifndef IOV_MAX
#define IOV_MAX 1024
#endif
ssize_t mca_fbtl_posix_pwritev(ompio_file_t *fh )
{
ssize_t bytes_written=0;
struct flock lock;
int lock_counter=0;
if (NULL == fh->f_io_array) {
return OMPI_ERROR;
}
if ( fh->f_atomicity ) {
OMPIO_SET_ATOMICITY_LOCK(fh, lock, lock_counter, F_WRLCK);
}
if ( fh->f_num_of_io_entries > 1 ) {
bool do_data_sieving = true;
size_t avg_gap_size=0;
size_t avg_block_size = 0;
off_t prev_offset = (off_t)fh->f_io_array[0].offset;
int i;
for ( i=0; i< fh->f_num_of_io_entries; i++ ) {
avg_block_size += fh->f_io_array[i].length;
avg_gap_size += (size_t)((off_t)fh->f_io_array[i].offset - prev_offset);
prev_offset = (off_t)fh->f_io_array[i].offset;
}
avg_block_size = avg_block_size / fh->f_num_of_io_entries;
avg_gap_size = avg_gap_size / fh->f_num_of_io_entries;
if ( false == mca_fbtl_posix_write_datasieving ||
0 == avg_gap_size ||
avg_block_size > mca_fbtl_posix_max_block_size ||
avg_gap_size > mca_fbtl_posix_max_gap_size ||
ompi_mpi_thread_multiple ||
!(fh->f_flags & OMPIO_COLLECTIVE_OP) ) {
do_data_sieving = false;
}
if ( do_data_sieving) {
bytes_written = mca_fbtl_posix_pwritev_datasieving (fh, &lock, &lock_counter);
}
else {
bytes_written = mca_fbtl_posix_pwritev_generic (fh, &lock, &lock_counter);
}
}
else {
// i.e. fh->f_num_of_io_entries == 1
bytes_written = mca_fbtl_posix_pwritev_single (fh, &lock, &lock_counter);
}
if ( fh->f_atomicity ) {
mca_fbtl_posix_unlock ( &lock, fh, &lock_counter );
}
return bytes_written;
}
ssize_t mca_fbtl_posix_pwritev_single (ompio_file_t *fh, struct flock *lock, int *lock_counter)
{
int ret;
ssize_t bytes_written=0, ret_code;
size_t total_bytes = 0;
size_t len = fh->f_io_array[0].length;
ret = mca_fbtl_posix_lock ( lock, fh, F_WRLCK, (off_t)fh->f_io_array[0].offset,
(off_t)fh->f_io_array[0].length, OMPIO_LOCK_ENTIRE_REGION,
lock_counter);
if ( 0 < ret ) {
opal_output(1, "mca_fbtl_posix_pwritev_single: error in mca_fbtl_posix_lock() ret=%d: %s",
ret, strerror(errno));
/* Just in case some part of the lock worked */
mca_fbtl_posix_unlock ( lock, fh, lock_counter);
return OMPI_ERROR;
}
while ( total_bytes < len ) {
ret_code = pwrite(fh->fd, (char*)fh->f_io_array[0].memory_address+total_bytes,
fh->f_io_array[0].length-total_bytes,
(off_t)fh->f_io_array[0].offset+total_bytes );
if ( ret_code == -1 ) {
opal_output(1, "mca_fbtl_posix_pwritev: error in (p)write(v):%s", strerror(errno));
mca_fbtl_posix_unlock ( lock, fh, lock_counter );
return OMPI_ERROR;
}
total_bytes += ret_code;
}
mca_fbtl_posix_unlock ( lock, fh, lock_counter );
bytes_written = total_bytes;
return bytes_written;
}
ssize_t mca_fbtl_posix_pwritev_datasieving (ompio_file_t *fh, struct flock *lock, int *lock_counter)
{
size_t start, end, len;
size_t bufsize = 0;
int ret, i, j;
ssize_t bytes_written=0, ret_code=0;
char *temp_buf = NULL;
int startindex = 0;
int endindex = 0;
bool done = false;
size_t total_bytes = 0;
while (!done) {
// Break the io_array into chunks such that the size of the temporary
// buffer does not exceed mca_fbtl_posix_max_tmpbuf_size bytes.
// Each iteration will thus work in the range (startindex, endindex[
startindex = endindex;
if ( startindex >= fh->f_num_of_io_entries ) {
done = true;
break;
}
size_t sstart = (size_t)fh->f_io_array[startindex].offset;
size_t slen=0;
for ( j = startindex; j < fh->f_num_of_io_entries; j++ ) {
endindex = j;
slen = ((size_t)fh->f_io_array[j].offset + fh->f_io_array[j].length) - sstart;
if (slen > mca_fbtl_posix_max_tmpbuf_size ) {
endindex = j-1;
break;
}
}
// Need to increment the value of endindex
// by one for the loop syntax to work correctly.
endindex++;
start = (size_t)fh->f_io_array[startindex].offset;
end = (size_t)fh->f_io_array[endindex-1].offset + fh->f_io_array[endindex-1].length;
len = end - start;
if ( len > bufsize ) {
if ( NULL != temp_buf ) {
free ( temp_buf);
}
temp_buf = (char *) malloc ( len );
if ( NULL == temp_buf ) {
opal_output(1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
bufsize = len;
}
// Read the entire block.
ret = mca_fbtl_posix_lock ( lock, fh, F_WRLCK, start, len, OMPIO_LOCK_ENTIRE_REGION, lock_counter );
if ( 0 < ret ) {
opal_output(1, "mca_fbtl_posix_pwritev_datasieving: error in mca_fbtl_posix_lock() ret=%d: %s",
ret, strerror(errno));
/* Just in case some part of the lock worked */
mca_fbtl_posix_unlock ( lock, fh, lock_counter);
free ( temp_buf);
return OMPI_ERROR;
}
while ( total_bytes < len ) {
ret_code = pread (fh->fd, temp_buf, len, start);
if ( ret_code == -1 ) {
opal_output(1, "mca_fbtl_posix_pwritev_datasieving: error in pread:%s", strerror(errno));
mca_fbtl_posix_unlock ( lock, fh, lock_counter);
free ( temp_buf);
return OMPI_ERROR;
}
if ( ret_code == 0 ) {
// end of file
break;
}
total_bytes += ret_code;
}
// Copy the elements to write into temporary buffer.
size_t pos = 0;
size_t num_bytes;
size_t start_offset = (size_t) fh->f_io_array[startindex].offset;
for ( i = startindex ; i < endindex ; i++) {
pos = (size_t) fh->f_io_array[i].offset - start_offset;
num_bytes = fh->f_io_array[i].length;
memcpy (temp_buf + pos, fh->f_io_array[i].memory_address, num_bytes);
bytes_written += num_bytes;
}
total_bytes = 0;
while ( total_bytes < len ) {
ret_code = pwrite (fh->fd, temp_buf+total_bytes, len-total_bytes, start+total_bytes);
if ( ret_code == -1 ) {
opal_output(1, "mca_fbtl_posix_pwritev_datasieving: error in pwrite:%s", strerror(errno));
mca_fbtl_posix_unlock ( lock, fh, lock_counter);
free ( temp_buf);
return OMPI_ERROR;
}
total_bytes += ret_code;
}
mca_fbtl_posix_unlock ( lock, fh, lock_counter);
}
free ( temp_buf);
return bytes_written;
}
ssize_t mca_fbtl_posix_pwritev_generic (ompio_file_t *fh, struct flock *lock, int *lock_counter )
{
/*int *fp = NULL;*/
int i, block = 1, ret;
struct iovec *iov = NULL;
int iov_count = 0;
OMPI_MPI_OFFSET_TYPE iov_offset = 0;
ssize_t ret_code=0, bytes_written=0;
off_t total_length, end_offset=0;
if (NULL == fh->f_io_array) {
return OMPI_ERROR;
}
iov = (struct iovec *) malloc
(OMPIO_IOVEC_INITIAL_SIZE * sizeof (struct iovec));
if (NULL == iov) {
opal_output(1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
for (i=0 ; i<fh->f_num_of_io_entries ; i++) {
if (0 == iov_count) {
iov[iov_count].iov_base = fh->f_io_array[i].memory_address;
iov[iov_count].iov_len = fh->f_io_array[i].length;
iov_offset = (OMPI_MPI_OFFSET_TYPE)(intptr_t)fh->f_io_array[i].offset;
end_offset = (off_t)fh->f_io_array[i].offset + (off_t)fh->f_io_array[i].length;
iov_count ++;
}
if (OMPIO_IOVEC_INITIAL_SIZE*block <= iov_count) {
block ++;
iov = (struct iovec *)realloc
(iov, OMPIO_IOVEC_INITIAL_SIZE * block *
sizeof(struct iovec));
if (NULL == iov) {
opal_output(1, "OUT OF MEMORY\n");
return OMPI_ERR_OUT_OF_RESOURCE;
}
}
if (fh->f_num_of_io_entries != i+1) {
if ( (((OMPI_MPI_OFFSET_TYPE)(intptr_t)fh->f_io_array[i].offset +
(ptrdiff_t)fh->f_io_array[i].length) ==
(OMPI_MPI_OFFSET_TYPE)(intptr_t)fh->f_io_array[i+1].offset) &&
(iov_count < IOV_MAX )) {
iov[iov_count].iov_base = fh->f_io_array[i+1].memory_address;
iov[iov_count].iov_len = fh->f_io_array[i+1].length;
end_offset = (off_t)fh->f_io_array[i].offset + (off_t)fh->f_io_array[i].length;
iov_count ++;
continue;
}
}
/*
printf ("RANK: %d Entries: %d count: %d\n",
fh->f_rank,
fh->f_num_of_io_entries,
iov_count);
for (j=0 ; j<iov_count ; j++) {
printf ("%p %lld\n",
iov[j].iov_base,
iov[j].iov_len);
}
*/
total_length = (end_offset - (off_t)iov_offset);
ret = mca_fbtl_posix_lock ( lock, fh, F_WRLCK, iov_offset, total_length, OMPIO_LOCK_SELECTIVE, lock_counter );
if ( 0 < ret ) {
opal_output(1, "mca_fbtl_posix_pwritev: error in mca_fbtl_posix_lock() error ret=%d %s", ret, strerror(errno));
free (iov);
/* just in case some part of the lock worked */
mca_fbtl_posix_unlock ( lock, fh, lock_counter );
return OMPI_ERROR;
}
#if defined (HAVE_PWRITEV)
ret_code = pwritev (fh->fd, iov, iov_count, iov_offset);
#else
if (-1 == lseek (fh->fd, iov_offset, SEEK_SET)) {
opal_output(1, "mca_fbtl_posix_pwritev: error in lseek:%s", strerror(errno));
free(iov);
mca_fbtl_posix_unlock ( lock, fh, lock_counter );
return OMPI_ERROR;
}
ret_code = writev (fh->fd, iov, iov_count);
#endif
mca_fbtl_posix_unlock ( lock, fh, lock_counter );
if ( 0 < ret_code ) {
bytes_written += ret_code;
}
else if (-1 == ret_code ) {
opal_output(1, "mca_fbtl_posix_pwritev: error in writev:%s", strerror(errno));
free (iov);
return OMPI_ERROR;
}
iov_count = 0;
}
free (iov);
return bytes_written;
}
|