options.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <ctype.h>
   5 #include <string.h>
   6 #include <getopt.h>
   7 #include <assert.h>
   8 #include <libgen.h>
   9 #include <fcntl.h>
  10 #include <sys/types.h>
  11 #include <sys/stat.h>
  12
  13 #include "fio.h"
  14 #include "verify.h"
  15 #include "parse.h"
  16 #include "lib/fls.h"
  17
  18 #define td_var_offset(var)      ((size_t) &((struct thread_options *)0)->var)
  19
  20 /*
  21  * Check if mmap/mmaphuge has a :/foo/bar/file at the end. If so, return that.
  22  */
  23 static char *get_opt_postfix(const char *str)
  24 {
  25         char *p = strstr(str, ":");
  26
  27         if (!p)
  28                 return NULL;
  29
  30         p++;
  31         strip_blank_front(&p);
  32         strip_blank_end(p);
  33         return strdup(p);
  34 }
  35
  36 static int bs_cmp(const void *p1, const void *p2)
  37 {
  38         const struct bssplit *bsp1 = p1;
  39         const struct bssplit *bsp2 = p2;
  40
  41         return bsp1->perc < bsp2->perc;
  42 }
  43
  44 static int bssplit_ddir(struct thread_data *td, int ddir, char *str)
  45 {
  46         struct bssplit *bssplit;
  47         unsigned int i, perc, perc_missing;
  48         unsigned int max_bs, min_bs;
  49         long long val;
  50         char *fname;
  51
  52         td->o.bssplit_nr[ddir] = 4;
  53         bssplit = malloc(4 * sizeof(struct bssplit));
  54
  55         i = 0;
  56         max_bs = 0;
  57         min_bs = -1;
  58         while ((fname = strsep(&str, ":")) != NULL) {
  59                 char *perc_str;
  60
  61                 if (!strlen(fname))
  62                         break;
  63
  64                 /*
  65                  * grow struct buffer, if needed
  66                  */
  67                 if (i == td->o.bssplit_nr[ddir]) {
  68                         td->o.bssplit_nr[ddir] <<= 1;
  69                         bssplit = realloc(bssplit, td->o.bssplit_nr[ddir]
  70                                                   * sizeof(struct bssplit));
  71                 }
  72
  73                 perc_str = strstr(fname, "/");
  74                 if (perc_str) {
  75                         *perc_str = '\0';
  76                         perc_str++;
  77                         perc = atoi(perc_str);
  78                         if (perc > 100)
  79                                 perc = 100;
  80                         else if (!perc)
  81                                 perc = -1;
  82                 } else
  83                         perc = -1;
  84
  85                 if (str_to_decimal(fname, &val, 1)) {
  86                         log_err("fio: bssplit conversion failed\n");
  87                         free(td->o.bssplit);
  88                         return 1;
  89                 }
  90
  91                 if (val > max_bs)
  92                         max_bs = val;
  93                 if (val < min_bs)
  94                         min_bs = val;
  95
  96                 bssplit[i].bs = val;
  97                 bssplit[i].perc = perc;
  98                 i++;
  99         }
 100
 101         td->o.bssplit_nr[ddir] = i;
 102
 103         /*
 104          * Now check if the percentages add up, and how much is missing
 105          */
 106         perc = perc_missing = 0;
 107         for (i = 0; i < td->o.bssplit_nr[ddir]; i++) {
 108                 struct bssplit *bsp = &bssplit[i];
 109
 110                 if (bsp->perc == (unsigned char) -1)
 111                         perc_missing++;
 112                 else
 113                         perc += bsp->perc;
 114         }
 115
 116         if (perc > 100) {
 117                 log_err("fio: bssplit percentages add to more than 100%%\n");
 118                 free(bssplit);
 119                 return 1;
 120         }
 121         /*
 122          * If values didn't have a percentage set, divide the remains between
 123          * them.
 124          */
 125         if (perc_missing) {
 126                 for (i = 0; i < td->o.bssplit_nr[ddir]; i++) {
 127                         struct bssplit *bsp = &bssplit[i];
 128
 129                         if (bsp->perc == (unsigned char) -1)
 130                                 bsp->perc = (100 - perc) / perc_missing;
 131                 }
 132         }
 133
 134         td->o.min_bs[ddir] = min_bs;
 135         td->o.max_bs[ddir] = max_bs;
 136
 137         /*
 138          * now sort based on percentages, for ease of lookup
 139          */
 140         qsort(bssplit, td->o.bssplit_nr[ddir], sizeof(struct bssplit), bs_cmp);
 141         td->o.bssplit[ddir] = bssplit;
 142         return 0;
 143
 144 }
 145
 146 static int str_bssplit_cb(void *data, const char *input)
 147 {
 148         struct thread_data *td = data;
 149         char *str, *p, *odir;
 150         int ret = 0;
 151
 152         p = str = strdup(input);
 153
 154         strip_blank_front(&str);
 155         strip_blank_end(str);
 156
 157         odir = strchr(str, ',');
 158         if (odir) {
 159                 ret = bssplit_ddir(td, DDIR_WRITE, odir + 1);
 160                 if (!ret) {
 161                         *odir = '\0';
 162                         ret = bssplit_ddir(td, DDIR_READ, str);
 163                 }
 164         } else {
 165                 char *op;
 166
 167                 op = strdup(str);
 168
 169                 ret = bssplit_ddir(td, DDIR_READ, str);
 170                 if (!ret)
 171                         ret = bssplit_ddir(td, DDIR_WRITE, op);
 172
 173                 free(op);
 174         }
 175
 176         free(p);
 177         return ret;
 178 }
 179
 180 static int str_rw_cb(void *data, const char *str)
 181 {
 182         struct thread_data *td = data;
 183         char *nr = get_opt_postfix(str);
 184
 185         td->o.ddir_nr = 1;
 186         if (nr) {
 187                 td->o.ddir_nr = atoi(nr);
 188                 free(nr);
 189         }
 190
 191         return 0;
 192 }
 193
 194 static int str_mem_cb(void *data, const char *mem)
 195 {
 196         struct thread_data *td = data;
 197
 198         if (td->o.mem_type == MEM_MMAPHUGE || td->o.mem_type == MEM_MMAP) {
 199                 td->mmapfile = get_opt_postfix(mem);
 200                 if (td->o.mem_type == MEM_MMAPHUGE && !td->mmapfile) {
 201                         log_err("fio: mmaphuge:/path/to/file\n");
 202                         return 1;
 203                 }
 204         }
 205
 206         return 0;
 207 }
 208
 209 static int str_lockmem_cb(void fio_unused *data, unsigned long *val)
 210 {
 211         mlock_size = *val;
 212         return 0;
 213 }
 214
 215 static int str_rwmix_read_cb(void *data, unsigned int *val)
 216 {
 217         struct thread_data *td = data;
 218
 219         td->o.rwmix[DDIR_READ] = *val;
 220         td->o.rwmix[DDIR_WRITE] = 100 - *val;
 221         return 0;
 222 }
 223
 224 static int str_rwmix_write_cb(void *data, unsigned int *val)
 225 {
 226         struct thread_data *td = data;
 227
 228         td->o.rwmix[DDIR_WRITE] = *val;
 229         td->o.rwmix[DDIR_READ] = 100 - *val;
 230         return 0;
 231 }
 232
 233 #ifdef FIO_HAVE_IOPRIO
 234 static int str_prioclass_cb(void *data, unsigned int *val)
 235 {
 236         struct thread_data *td = data;
 237         unsigned short mask;
 238
 239         /*
 240          * mask off old class bits, str_prio_cb() may have set a default class
 241          */
 242         mask = (1 << IOPRIO_CLASS_SHIFT) - 1;
 243         td->ioprio &= mask;
 244
 245         td->ioprio |= *val << IOPRIO_CLASS_SHIFT;
 246         td->ioprio_set = 1;
 247         return 0;
 248 }
 249
 250 static int str_prio_cb(void *data, unsigned int *val)
 251 {
 252         struct thread_data *td = data;
 253
 254         td->ioprio |= *val;
 255
 256         /*
 257          * If no class is set, assume BE
 258          */
 259         if ((td->ioprio >> IOPRIO_CLASS_SHIFT) == 0)
 260                 td->ioprio |= IOPRIO_CLASS_BE << IOPRIO_CLASS_SHIFT;
 261
 262         td->ioprio_set = 1;
 263         return 0;
 264 }
 265 #endif
 266
 267 static int str_exitall_cb(void)
 268 {
 269         exitall_on_terminate = 1;
 270         return 0;
 271 }
 272
 273 #ifdef FIO_HAVE_CPU_AFFINITY
 274 static int str_cpumask_cb(void *data, unsigned int *val)
 275 {
 276         struct thread_data *td = data;
 277         unsigned int i;
 278         long max_cpu;
 279         int ret;
 280
 281         ret = fio_cpuset_init(&td->o.cpumask);
 282         if (ret < 0) {
 283                 log_err("fio: cpuset_init failed\n");
 284                 td_verror(td, ret, "fio_cpuset_init");
 285                 return 1;
 286         }
 287
 288         max_cpu = sysconf(_SC_NPROCESSORS_ONLN);
 289
 290         for (i = 0; i < sizeof(int) * 8; i++) {
 291                 if ((1 << i) & *val) {
 292                         if (i > max_cpu) {
 293                                 log_err("fio: CPU %d too large (max=%ld)\n", i,
 294                                                                 max_cpu);
 295                                 return 1;
 296                         }
 297                         dprint(FD_PARSE, "set cpu allowed %d\n", i);
 298                         fio_cpu_set(&td->o.cpumask, i);
 299                 }
 300         }
 301
 302         td->o.cpumask_set = 1;
 303         return 0;
 304 }
 305
 306 static int str_cpus_allowed_cb(void *data, const char *input)
 307 {
 308         struct thread_data *td = data;
 309         char *cpu, *str, *p;
 310         long max_cpu;
 311         int ret = 0;
 312
 313         ret = fio_cpuset_init(&td->o.cpumask);
 314         if (ret < 0) {
 315                 log_err("fio: cpuset_init failed\n");
 316                 td_verror(td, ret, "fio_cpuset_init");
 317                 return 1;
 318         }
 319
 320         p = str = strdup(input);
 321
 322         strip_blank_front(&str);
 323         strip_blank_end(str);
 324
 325         max_cpu = sysconf(_SC_NPROCESSORS_ONLN);
 326
 327         while ((cpu = strsep(&str, ",")) != NULL) {
 328                 char *str2, *cpu2;
 329                 int icpu, icpu2;
 330
 331                 if (!strlen(cpu))
 332                         break;
 333
 334                 str2 = cpu;
 335                 icpu2 = -1;
 336                 while ((cpu2 = strsep(&str2, "-")) != NULL) {
 337                         if (!strlen(cpu2))
 338                                 break;
 339
 340                         icpu2 = atoi(cpu2);
 341                 }
 342
 343                 icpu = atoi(cpu);
 344                 if (icpu2 == -1)
 345                         icpu2 = icpu;
 346                 while (icpu <= icpu2) {
 347                         if (icpu >= FIO_MAX_CPUS) {
 348                                 log_err("fio: your OS only supports up to"
 349                                         " %d CPUs\n", (int) FIO_MAX_CPUS);
 350                                 ret = 1;
 351                                 break;
 352                         }
 353                         if (icpu > max_cpu) {
 354                                 log_err("fio: CPU %d too large (max=%ld)\n",
 355                                                         icpu, max_cpu);
 356                                 ret = 1;
 357                                 break;
 358                         }
 359
 360                         dprint(FD_PARSE, "set cpu allowed %d\n", icpu);
 361                         fio_cpu_set(&td->o.cpumask, icpu);
 362                         icpu++;
 363                 }
 364                 if (ret)
 365                         break;
 366         }
 367
 368         free(p);
 369         if (!ret)
 370                 td->o.cpumask_set = 1;
 371         return ret;
 372 }
 373 #endif
 374
 375 static int str_fst_cb(void *data, const char *str)
 376 {
 377         struct thread_data *td = data;
 378         char *nr = get_opt_postfix(str);
 379
 380         td->file_service_nr = 1;
 381         if (nr) {
 382                 td->file_service_nr = atoi(nr);
 383                 free(nr);
 384         }
 385
 386         return 0;
 387 }
 388
 389 static int check_dir(struct thread_data *td, char *fname)
 390 {
 391         char file[PATH_MAX], *dir;
 392         int elen = 0;
 393
 394         if (td->o.directory) {
 395                 strcpy(file, td->o.directory);
 396                 strcat(file, "/");
 397                 elen = strlen(file);
 398         }
 399
 400         sprintf(file + elen, "%s", fname);
 401         dir = dirname(file);
 402
 403 #if 0
 404         {
 405         struct stat sb;
 406         /*
 407          * We can't do this on FIO_DISKLESSIO engines. The engine isn't loaded
 408          * yet, so we can't do this check right here...
 409          */
 410         if (lstat(dir, &sb) < 0) {
 411                 int ret = errno;
 412
 413                 log_err("fio: %s is not a directory\n", dir);
 414                 td_verror(td, ret, "lstat");
 415                 return 1;
 416         }
 417
 418         if (!S_ISDIR(sb.st_mode)) {
 419                 log_err("fio: %s is not a directory\n", dir);
 420                 return 1;
 421         }
 422         }
 423 #endif
 424
 425         return 0;
 426 }
 427
 428 static int str_filename_cb(void *data, const char *input)
 429 {
 430         struct thread_data *td = data;
 431         char *fname, *str, *p;
 432
 433         p = str = strdup(input);
 434
 435         strip_blank_front(&str);
 436         strip_blank_end(str);
 437
 438         if (!td->files_index)
 439                 td->o.nr_files = 0;
 440
 441         while ((fname = strsep(&str, ":")) != NULL) {
 442                 if (!strlen(fname))
 443                         break;
 444                 if (check_dir(td, fname)) {
 445                         free(p);
 446                         return 1;
 447                 }
 448                 add_file(td, fname);
 449                 td->o.nr_files++;
 450         }
 451
 452         free(p);
 453         return 0;
 454 }
 455
 456 static int str_directory_cb(void *data, const char fio_unused *str)
 457 {
 458         struct thread_data *td = data;
 459         struct stat sb;
 460
 461         if (lstat(td->o.directory, &sb) < 0) {
 462                 int ret = errno;
 463
 464                 log_err("fio: %s is not a directory\n", td->o.directory);
 465                 td_verror(td, ret, "lstat");
 466                 return 1;
 467         }
 468         if (!S_ISDIR(sb.st_mode)) {
 469                 log_err("fio: %s is not a directory\n", td->o.directory);
 470                 return 1;
 471         }
 472
 473         return 0;
 474 }
 475
 476 static int str_opendir_cb(void *data, const char fio_unused *str)
 477 {
 478         struct thread_data *td = data;
 479
 480         if (!td->files_index)
 481                 td->o.nr_files = 0;
 482
 483         return add_dir_files(td, td->o.opendir);
 484 }
 485
 486 static int str_verify_offset_cb(void *data, unsigned int *off)
 487 {
 488         struct thread_data *td = data;
 489
 490         if (*off && *off < sizeof(struct verify_header)) {
 491                 log_err("fio: verify_offset too small\n");
 492                 return 1;
 493         }
 494
 495         td->o.verify_offset = *off;
 496         return 0;
 497 }
 498
 499 static int str_verify_pattern_cb(void *data, unsigned int *off)
 500 {
 501         struct thread_data *td = data;
 502         unsigned int msb;
 503
 504         msb = __fls(*off);
 505         if (msb <= 8)
 506                 td->o.verify_pattern_bytes = 1;
 507         else if (msb <= 16)
 508                 td->o.verify_pattern_bytes = 2;
 509         else if (msb <= 24)
 510                 td->o.verify_pattern_bytes = 3;
 511         else
 512                 td->o.verify_pattern_bytes = 4;
 513
 514         td->o.verify_pattern = *off;
 515         return 0;
 516 }
 517
 518 static int str_lockfile_cb(void *data, const char *str)
 519 {
 520         struct thread_data *td = data;
 521         char *nr = get_opt_postfix(str);
 522
 523         td->o.lockfile_batch = 1;
 524         if (nr) {
 525                 td->o.lockfile_batch = atoi(nr);
 526                 free(nr);
 527         }
 528
 529         return 0;
 530 }
 531
 532 static int str_write_bw_log_cb(void *data, const char *str)
 533 {
 534         struct thread_data *td = data;
 535
 536         if (str)
 537                 td->o.bw_log_file = strdup(str);
 538
 539         td->o.write_bw_log = 1;
 540         return 0;
 541 }
 542
 543 static int str_write_lat_log_cb(void *data, const char *str)
 544 {
 545         struct thread_data *td = data;
 546
 547         if (str)
 548                 td->o.lat_log_file = strdup(str);
 549
 550         td->o.write_lat_log = 1;
 551         return 0;
 552 }
 553
 554 static int str_gtod_reduce_cb(void *data, int *il)
 555 {
 556         struct thread_data *td = data;
 557         int val = *il;
 558
 559         td->o.disable_clat = !!val;
 560         td->o.disable_slat = !!val;
 561         td->o.disable_bw = !!val;
 562         if (val)
 563                 td->tv_cache_mask = 63;
 564
 565         return 0;
 566 }
 567
 568 static int str_gtod_cpu_cb(void *data, int *il)
 569 {
 570         struct thread_data *td = data;
 571         int val = *il;
 572
 573         td->o.gtod_cpu = val;
 574         td->o.gtod_offload = 1;
 575         return 0;
 576 }
 577
 578 static int rw_verify(struct fio_option *o, void *data)
 579 {
 580         struct thread_data *td = data;
 581
 582         if (read_only && td_write(td)) {
 583                 log_err("fio: job <%s> has write bit set, but fio is in"
 584                         " read-only mode\n", td->o.name);
 585                 return 1;
 586         }
 587
 588         return 0;
 589 }
 590
 591 static int gtod_cpu_verify(struct fio_option *o, void *data)
 592 {
 593 #ifndef FIO_HAVE_CPU_AFFINITY
 594         struct thread_data *td = data;
 595
 596         if (td->o.gtod_cpu) {
 597                 log_err("fio: platform must support CPU affinity for"
 598                         "gettimeofday() offloading\n");
 599                 return 1;
 600         }
 601 #endif
 602
 603         return 0;
 604 }
 605
 606 #define __stringify_1(x)        #x
 607 #define __stringify(x)          __stringify_1(x)
 608
 609 /*
 610  * Map of job/command line options
 611  */
 612 static struct fio_option options[] = {
 613         {
 614                 .name   = "description",
 615                 .type   = FIO_OPT_STR_STORE,
 616                 .off1   = td_var_offset(description),
 617                 .help   = "Text job description",
 618         },
 619         {
 620                 .name   = "name",
 621                 .type   = FIO_OPT_STR_STORE,
 622                 .off1   = td_var_offset(name),
 623                 .help   = "Name of this job",
 624         },
 625         {
 626                 .name   = "directory",
 627                 .type   = FIO_OPT_STR_STORE,
 628                 .off1   = td_var_offset(directory),
 629                 .cb     = str_directory_cb,
 630                 .help   = "Directory to store files in",
 631         },
 632         {
 633                 .name   = "filename",
 634                 .type   = FIO_OPT_STR_STORE,
 635                 .off1   = td_var_offset(filename),
 636                 .cb     = str_filename_cb,
 637                 .prio   = -1, /* must come after "directory" */
 638                 .help   = "File(s) to use for the workload",
 639         },
 640         {
 641                 .name   = "lockfile",
 642                 .type   = FIO_OPT_STR,
 643                 .cb     = str_lockfile_cb,
 644                 .off1   = td_var_offset(file_lock_mode),
 645                 .help   = "Lock file when doing IO to it",
 646                 .parent = "filename",
 647                 .def    = "none",
 648                 .posval = {
 649                           { .ival = "none",
 650                             .oval = FILE_LOCK_NONE,
 651                             .help = "No file locking",
 652                           },
 653                           { .ival = "exclusive",
 654                             .oval = FILE_LOCK_EXCLUSIVE,
 655                             .help = "Exclusive file lock",
 656                           },
 657                           {
 658                             .ival = "readwrite",
 659                             .oval = FILE_LOCK_READWRITE,
 660                             .help = "Read vs write lock",
 661                           },
 662                 },
 663         },
 664         {
 665                 .name   = "opendir",
 666                 .type   = FIO_OPT_STR_STORE,
 667                 .off1   = td_var_offset(opendir),
 668                 .cb     = str_opendir_cb,
 669                 .help   = "Recursively add files from this directory and down",
 670         },
 671         {
 672                 .name   = "rw",
 673                 .alias  = "readwrite",
 674                 .type   = FIO_OPT_STR,
 675                 .cb     = str_rw_cb,
 676                 .off1   = td_var_offset(td_ddir),
 677                 .help   = "IO direction",
 678                 .def    = "read",
 679                 .verify = rw_verify,
 680                 .posval = {
 681                           { .ival = "read",
 682                             .oval = TD_DDIR_READ,
 683                             .help = "Sequential read",
 684                           },
 685                           { .ival = "write",
 686                             .oval = TD_DDIR_WRITE,
 687                             .help = "Sequential write",
 688                           },
 689                           { .ival = "randread",
 690                             .oval = TD_DDIR_RANDREAD,
 691                             .help = "Random read",
 692                           },
 693                           { .ival = "randwrite",
 694                             .oval = TD_DDIR_RANDWRITE,
 695                             .help = "Random write",
 696                           },
 697                           { .ival = "rw",
 698                             .oval = TD_DDIR_RW,
 699                             .help = "Sequential read and write mix",
 700                           },
 701                           { .ival = "randrw",
 702                             .oval = TD_DDIR_RANDRW,
 703                             .help = "Random read and write mix"
 704                           },
 705                 },
 706         },
 707         {
 708                 .name   = "ioengine",
 709                 .type   = FIO_OPT_STR_STORE,
 710                 .off1   = td_var_offset(ioengine),
 711                 .help   = "IO engine to use",
 712                 .def    = "sync",
 713                 .posval = {
 714                           { .ival = "sync",
 715                             .help = "Use read/write",
 716                           },
 717                           { .ival = "psync",
 718                             .help = "Use pread/pwrite",
 719                           },
 720                           { .ival = "vsync",
 721                              .help = "Use readv/writev",
 722                           },
 723 #ifdef FIO_HAVE_LIBAIO
 724                           { .ival = "libaio",
 725                             .help = "Linux native asynchronous IO",
 726                           },
 727 #endif
 728 #ifdef FIO_HAVE_POSIXAIO
 729                           { .ival = "posixaio",
 730                             .help = "POSIX asynchronous IO",
 731                           },
 732 #endif
 733 #ifdef FIO_HAVE_SOLARISAIO
 734                           { .ival = "solarisaio",
 735                             .help = "Solaris native asynchronous IO",
 736                           },
 737 #endif
 738                           { .ival = "mmap",
 739                             .help = "Memory mapped IO",
 740                           },
 741 #ifdef FIO_HAVE_SPLICE
 742                           { .ival = "splice",
 743                             .help = "splice/vmsplice based IO",
 744                           },
 745                           { .ival = "netsplice",
 746                             .help = "splice/vmsplice to/from the network",
 747                           },
 748 #endif
 749 #ifdef FIO_HAVE_SGIO
 750                           { .ival = "sg",
 751                             .help = "SCSI generic v3 IO",
 752                           },
 753 #endif
 754                           { .ival = "null",
 755                             .help = "Testing engine (no data transfer)",
 756                           },
 757                           { .ival = "net",
 758                             .help = "Network IO",
 759                           },
 760 #ifdef FIO_HAVE_SYSLET
 761                           { .ival = "syslet-rw",
 762                             .help = "syslet enabled async pread/pwrite IO",
 763                           },
 764 #endif
 765                           { .ival = "cpuio",
 766                             .help = "CPU cycler burner engine",
 767                           },
 768 #ifdef FIO_HAVE_GUASI
 769                           { .ival = "guasi",
 770                             .help = "GUASI IO engine",
 771                           },
 772 #endif
 773                           { .ival = "external",
 774                             .help = "Load external engine (append name)",
 775                           },
 776                 },
 777         },
 778         {
 779                 .name   = "iodepth",
 780                 .type   = FIO_OPT_INT,
 781                 .off1   = td_var_offset(iodepth),
 782                 .help   = "Amount of IO buffers to keep in flight",
 783                 .minval = 1,
 784                 .def    = "1",
 785         },
 786         {
 787                 .name   = "iodepth_batch",
 788                 .alias  = "iodepth_batch_submit",
 789                 .type   = FIO_OPT_INT,
 790                 .off1   = td_var_offset(iodepth_batch),
 791                 .help   = "Number of IO buffers to submit in one go",
 792                 .parent = "iodepth",
 793                 .minval = 1,
 794                 .def    = "1",
 795         },
 796         {
 797                 .name   = "iodepth_batch_complete",
 798                 .type   = FIO_OPT_INT,
 799                 .off1   = td_var_offset(iodepth_batch_complete),
 800                 .help   = "Number of IO buffers to retrieve in one go",
 801                 .parent = "iodepth",
 802                 .minval = 0,
 803                 .def    = "1",
 804         },
 805         {
 806                 .name   = "iodepth_low",
 807                 .type   = FIO_OPT_INT,
 808                 .off1   = td_var_offset(iodepth_low),
 809                 .help   = "Low water mark for queuing depth",
 810                 .parent = "iodepth",
 811         },
 812         {
 813                 .name   = "size",
 814                 .type   = FIO_OPT_STR_VAL,
 815                 .off1   = td_var_offset(size),
 816                 .minval = 1,
 817                 .help   = "Total size of device or files",
 818         },
 819         {
 820                 .name   = "fill_device",
 821                 .type   = FIO_OPT_BOOL,
 822                 .off1   = td_var_offset(fill_device),
 823                 .help   = "Write until an ENOSPC error occurs",
 824                 .def    = "0",
 825         },
 826         {
 827                 .name   = "filesize",
 828                 .type   = FIO_OPT_STR_VAL,
 829                 .off1   = td_var_offset(file_size_low),
 830                 .off2   = td_var_offset(file_size_high),
 831                 .minval = 1,
 832                 .help   = "Size of individual files",
 833         },
 834         {
 835                 .name   = "offset",
 836                 .alias  = "fileoffset",
 837                 .type   = FIO_OPT_STR_VAL,
 838                 .off1   = td_var_offset(start_offset),
 839                 .help   = "Start IO from this offset",
 840                 .def    = "0",
 841         },
 842         {
 843                 .name   = "bs",
 844                 .alias  = "blocksize",
 845                 .type   = FIO_OPT_INT,
 846                 .off1   = td_var_offset(bs[DDIR_READ]),
 847                 .off2   = td_var_offset(bs[DDIR_WRITE]),
 848                 .minval = 1,
 849                 .help   = "Block size unit",
 850                 .def    = "4k",
 851                 .parent = "rw",
 852         },
 853         {
 854                 .name   = "ba",
 855                 .alias  = "blockalign",
 856                 .type   = FIO_OPT_INT,
 857                 .off1   = td_var_offset(ba[DDIR_READ]),
 858                 .off2   = td_var_offset(ba[DDIR_WRITE]),
 859                 .minval = 1,
 860                 .help   = "IO block offset alignment",
 861                 .parent = "rw",
 862         },
 863         {
 864                 .name   = "bsrange",
 865                 .alias  = "blocksize_range",
 866                 .type   = FIO_OPT_RANGE,
 867                 .off1   = td_var_offset(min_bs[DDIR_READ]),
 868                 .off2   = td_var_offset(max_bs[DDIR_READ]),
 869                 .off3   = td_var_offset(min_bs[DDIR_WRITE]),
 870                 .off4   = td_var_offset(max_bs[DDIR_WRITE]),
 871                 .minval = 1,
 872                 .help   = "Set block size range (in more detail than bs)",
 873                 .parent = "rw",
 874         },
 875         {
 876                 .name   = "bssplit",
 877                 .type   = FIO_OPT_STR,
 878                 .cb     = str_bssplit_cb,
 879                 .help   = "Set a specific mix of block sizes",
 880                 .parent = "rw",
 881         },
 882         {
 883                 .name   = "bs_unaligned",
 884                 .alias  = "blocksize_unaligned",
 885                 .type   = FIO_OPT_STR_SET,
 886                 .off1   = td_var_offset(bs_unaligned),
 887                 .help   = "Don't sector align IO buffer sizes",
 888                 .parent = "rw",
 889         },
 890         {
 891                 .name   = "randrepeat",
 892                 .type   = FIO_OPT_BOOL,
 893                 .off1   = td_var_offset(rand_repeatable),
 894                 .help   = "Use repeatable random IO pattern",
 895                 .def    = "1",
 896                 .parent = "rw",
 897         },
 898         {
 899                 .name   = "norandommap",
 900                 .type   = FIO_OPT_STR_SET,
 901                 .off1   = td_var_offset(norandommap),
 902                 .help   = "Accept potential duplicate random blocks",
 903                 .parent = "rw",
 904         },
 905         {
 906                 .name   = "softrandommap",
 907                 .type   = FIO_OPT_BOOL,
 908                 .off1   = td_var_offset(softrandommap),
 909                 .help   = "Set norandommap if randommap allocation fails",
 910                 .parent = "norandommap",
 911                 .def    = "0",
 912         },
 913         {
 914                 .name   = "nrfiles",
 915                 .type   = FIO_OPT_INT,
 916                 .off1   = td_var_offset(nr_files),
 917                 .help   = "Split job workload between this number of files",
 918                 .def    = "1",
 919         },
 920         {
 921                 .name   = "openfiles",
 922                 .type   = FIO_OPT_INT,
 923                 .off1   = td_var_offset(open_files),
 924                 .help   = "Number of files to keep open at the same time",
 925         },
 926         {
 927                 .name   = "file_service_type",
 928                 .type   = FIO_OPT_STR,
 929                 .cb     = str_fst_cb,
 930                 .off1   = td_var_offset(file_service_type),
 931                 .help   = "How to select which file to service next",
 932                 .def    = "roundrobin",
 933                 .posval = {
 934                           { .ival = "random",
 935                             .oval = FIO_FSERVICE_RANDOM,
 936                             .help = "Choose a file at random",
 937                           },
 938                           { .ival = "roundrobin",
 939                             .oval = FIO_FSERVICE_RR,
 940                             .help = "Round robin select files",
 941                           },
 942                           { .ival = "sequential",
 943                             .oval = FIO_FSERVICE_SEQ,
 944                             .help = "Finish one file before moving to the next",
 945                           },
 946                 },
 947                 .parent = "nrfiles",
 948         },
 949         {
 950                 .name   = "fadvise_hint",
 951                 .type   = FIO_OPT_BOOL,
 952                 .off1   = td_var_offset(fadvise_hint),
 953                 .help   = "Use fadvise() to advise the kernel on IO pattern",
 954                 .def    = "1",
 955         },
 956         {
 957                 .name   = "fsync",
 958                 .type   = FIO_OPT_INT,
 959                 .off1   = td_var_offset(fsync_blocks),
 960                 .help   = "Issue fsync for writes every given number of blocks",
 961                 .def    = "0",
 962         },
 963         {
 964                 .name   = "fdatasync",
 965                 .type   = FIO_OPT_INT,
 966                 .off1   = td_var_offset(fdatasync_blocks),
 967                 .help   = "Issue fdatasync for writes every given number of blocks",
 968                 .def    = "0",
 969         },
 970         {
 971                 .name   = "direct",
 972                 .type   = FIO_OPT_BOOL,
 973                 .off1   = td_var_offset(odirect),
 974                 .help   = "Use O_DIRECT IO (negates buffered)",
 975                 .def    = "0",
 976         },
 977         {
 978                 .name   = "buffered",
 979                 .type   = FIO_OPT_BOOL,
 980                 .off1   = td_var_offset(odirect),
 981                 .neg    = 1,
 982                 .help   = "Use buffered IO (negates direct)",
 983                 .def    = "1",
 984         },
 985         {
 986                 .name   = "overwrite",
 987                 .type   = FIO_OPT_BOOL,
 988                 .off1   = td_var_offset(overwrite),
 989                 .help   = "When writing, set whether to overwrite current data",
 990                 .def    = "0",
 991         },
 992         {
 993                 .name   = "loops",
 994                 .type   = FIO_OPT_INT,
 995                 .off1   = td_var_offset(loops),
 996                 .help   = "Number of times to run the job",
 997                 .def    = "1",
 998         },
 999         {
1000                 .name   = "numjobs",
1001                 .type   = FIO_OPT_INT,
1002                 .off1   = td_var_offset(numjobs),
1003                 .help   = "Duplicate this job this many times",
1004                 .def    = "1",
1005         },
1006         {
1007                 .name   = "startdelay",
1008                 .type   = FIO_OPT_INT,
1009                 .off1   = td_var_offset(start_delay),
1010                 .help   = "Only start job when this period has passed",
1011                 .def    = "0",
1012         },
1013         {
1014                 .name   = "runtime",
1015                 .alias  = "timeout",
1016                 .type   = FIO_OPT_STR_VAL_TIME,
1017                 .off1   = td_var_offset(timeout),
1018                 .help   = "Stop workload when this amount of time has passed",
1019                 .def    = "0",
1020         },
1021         {
1022                 .name   = "time_based",
1023                 .type   = FIO_OPT_STR_SET,
1024                 .off1   = td_var_offset(time_based),
1025                 .help   = "Keep running until runtime/timeout is met",
1026         },
1027         {
1028                 .name   = "ramp_time",
1029                 .type   = FIO_OPT_STR_VAL_TIME,
1030                 .off1   = td_var_offset(ramp_time),
1031                 .help   = "Ramp up time before measuring performance",
1032         },
1033         {
1034                 .name   = "mem",
1035                 .alias  = "iomem",
1036                 .type   = FIO_OPT_STR,
1037                 .cb     = str_mem_cb,
1038                 .off1   = td_var_offset(mem_type),
1039                 .help   = "Backing type for IO buffers",
1040                 .def    = "malloc",
1041                 .posval = {
1042                           { .ival = "malloc",
1043                             .oval = MEM_MALLOC,
1044                             .help = "Use malloc(3) for IO buffers",
1045                           },
1046                           { .ival = "shm",
1047                             .oval = MEM_SHM,
1048                             .help = "Use shared memory segments for IO buffers",
1049                           },
1050 #ifdef FIO_HAVE_HUGETLB
1051                           { .ival = "shmhuge",
1052                             .oval = MEM_SHMHUGE,
1053                             .help = "Like shm, but use huge pages",
1054                           },
1055 #endif
1056                           { .ival = "mmap",
1057                             .oval = MEM_MMAP,
1058                             .help = "Use mmap(2) (file or anon) for IO buffers",
1059                           },
1060 #ifdef FIO_HAVE_HUGETLB
1061                           { .ival = "mmaphuge",
1062                             .oval = MEM_MMAPHUGE,
1063                             .help = "Like mmap, but use huge pages",
1064                           },
1065 #endif
1066                   },
1067         },
1068         {
1069                 .name   = "iomem_align",
1070                 .alias  = "mem_align",
1071                 .type   = FIO_OPT_INT,
1072                 .off1   = td_var_offset(mem_align),
1073                 .minval = 0,
1074                 .help   = "IO memory buffer offset alignment",
1075                 .def    = "0",
1076                 .parent = "iomem",
1077         },
1078         {
1079                 .name   = "verify",
1080                 .type   = FIO_OPT_STR,
1081                 .off1   = td_var_offset(verify),
1082                 .help   = "Verify data written",
1083                 .def    = "0",
1084                 .posval = {
1085                           { .ival = "0",
1086                             .oval = VERIFY_NONE,
1087                             .help = "Don't do IO verification",
1088                           },
1089                           { .ival = "md5",
1090                             .oval = VERIFY_MD5,
1091                             .help = "Use md5 checksums for verification",
1092                           },
1093                           { .ival = "crc64",
1094                             .oval = VERIFY_CRC64,
1095                             .help = "Use crc64 checksums for verification",
1096                           },
1097                           { .ival = "crc32",
1098                             .oval = VERIFY_CRC32,
1099                             .help = "Use crc32 checksums for verification",
1100                           },
1101                           { .ival = "crc32c-intel",
1102                             .oval = VERIFY_CRC32C_INTEL,
1103                             .help = "Use hw crc32c checksums for verification",
1104                           },
1105                           { .ival = "crc32c",
1106                             .oval = VERIFY_CRC32C,
1107                             .help = "Use crc32c checksums for verification",
1108                           },
1109                           { .ival = "crc16",
1110                             .oval = VERIFY_CRC16,
1111                             .help = "Use crc16 checksums for verification",
1112                           },
1113                           { .ival = "crc7",
1114                             .oval = VERIFY_CRC7,
1115                             .help = "Use crc7 checksums for verification",
1116                           },
1117                           { .ival = "sha256",
1118                             .oval = VERIFY_SHA256,
1119                             .help = "Use sha256 checksums for verification",
1120                           },
1121                           { .ival = "sha512",
1122                             .oval = VERIFY_SHA512,
1123                             .help = "Use sha512 checksums for verification",
1124                           },
1125                           { .ival = "meta",
1126                             .oval = VERIFY_META,
1127                             .help = "Use io information",
1128                           },
1129                           {
1130                             .ival = "null",
1131                             .oval = VERIFY_NULL,
1132                             .help = "Pretend to verify",
1133                           },
1134                 },
1135         },
1136         {
1137                 .name   = "do_verify",
1138                 .type   = FIO_OPT_BOOL,
1139                 .off1   = td_var_offset(do_verify),
1140                 .help   = "Run verification stage after write",
1141                 .def    = "1",
1142                 .parent = "verify",
1143         },
1144         {
1145                 .name   = "verifysort",
1146                 .type   = FIO_OPT_BOOL,
1147                 .off1   = td_var_offset(verifysort),
1148                 .help   = "Sort written verify blocks for read back",
1149                 .def    = "1",
1150                 .parent = "verify",
1151         },
1152         {
1153                 .name   = "verify_interval",
1154                 .type   = FIO_OPT_INT,
1155                 .off1   = td_var_offset(verify_interval),
1156                 .minval = 2 * sizeof(struct verify_header),
1157                 .help   = "Store verify buffer header every N bytes",
1158                 .parent = "verify",
1159         },
1160         {
1161                 .name   = "verify_offset",
1162                 .type   = FIO_OPT_INT,
1163                 .help   = "Offset verify header location by N bytes",
1164                 .def    = "0",
1165                 .cb     = str_verify_offset_cb,
1166                 .parent = "verify",
1167         },
1168         {
1169                 .name   = "verify_pattern",
1170                 .type   = FIO_OPT_INT,
1171                 .cb     = str_verify_pattern_cb,
1172                 .help   = "Fill pattern for IO buffers",
1173                 .parent = "verify",
1174         },
1175         {
1176                 .name   = "verify_fatal",
1177                 .type   = FIO_OPT_BOOL,
1178                 .off1   = td_var_offset(verify_fatal),
1179                 .def    = "0",
1180                 .help   = "Exit on a single verify failure, don't continue",
1181                 .parent = "verify",
1182         },
1183         {
1184                 .name   = "write_iolog",
1185                 .type   = FIO_OPT_STR_STORE,
1186                 .off1   = td_var_offset(write_iolog_file),
1187                 .help   = "Store IO pattern to file",
1188         },
1189         {
1190                 .name   = "read_iolog",
1191                 .type   = FIO_OPT_STR_STORE,
1192                 .off1   = td_var_offset(read_iolog_file),
1193                 .help   = "Playback IO pattern from file",
1194         },
1195         {
1196                 .name   = "exec_prerun",
1197                 .type   = FIO_OPT_STR_STORE,
1198                 .off1   = td_var_offset(exec_prerun),
1199                 .help   = "Execute this file prior to running job",
1200         },
1201         {
1202                 .name   = "exec_postrun",
1203                 .type   = FIO_OPT_STR_STORE,
1204                 .off1   = td_var_offset(exec_postrun),
1205                 .help   = "Execute this file after running job",
1206         },
1207 #ifdef FIO_HAVE_IOSCHED_SWITCH
1208         {
1209                 .name   = "ioscheduler",
1210                 .type   = FIO_OPT_STR_STORE,
1211                 .off1   = td_var_offset(ioscheduler),
1212                 .help   = "Use this IO scheduler on the backing device",
1213         },
1214 #endif
1215         {
1216                 .name   = "zonesize",
1217                 .type   = FIO_OPT_STR_VAL,
1218                 .off1   = td_var_offset(zone_size),
1219                 .help   = "Give size of an IO zone",
1220                 .def    = "0",
1221         },
1222         {
1223                 .name   = "zoneskip",
1224                 .type   = FIO_OPT_STR_VAL,
1225                 .off1   = td_var_offset(zone_skip),
1226                 .help   = "Space between IO zones",
1227                 .def    = "0",
1228         },
1229         {
1230                 .name   = "lockmem",
1231                 .type   = FIO_OPT_STR_VAL,
1232                 .cb     = str_lockmem_cb,
1233                 .help   = "Lock down this amount of memory",
1234                 .def    = "0",
1235         },
1236         {
1237                 .name   = "rwmixread",
1238                 .type   = FIO_OPT_INT,
1239                 .cb     = str_rwmix_read_cb,
1240                 .maxval = 100,
1241                 .help   = "Percentage of mixed workload that is reads",
1242                 .def    = "50",
1243         },
1244         {
1245                 .name   = "rwmixwrite",
1246                 .type   = FIO_OPT_INT,
1247                 .cb     = str_rwmix_write_cb,
1248                 .maxval = 100,
1249                 .help   = "Percentage of mixed workload that is writes",
1250                 .def    = "50",
1251         },
1252         {
1253                 .name   = "rwmixcycle",
1254                 .type   = FIO_OPT_DEPRECATED,
1255         },
1256         {
1257                 .name   = "nice",
1258                 .type   = FIO_OPT_INT,
1259                 .off1   = td_var_offset(nice),
1260                 .help   = "Set job CPU nice value",
1261                 .minval = -19,
1262                 .maxval = 20,
1263                 .def    = "0",
1264         },
1265 #ifdef FIO_HAVE_IOPRIO
1266         {
1267                 .name   = "prio",
1268                 .type   = FIO_OPT_INT,
1269                 .cb     = str_prio_cb,
1270                 .help   = "Set job IO priority value",
1271                 .minval = 0,
1272                 .maxval = 7,
1273         },
1274         {
1275                 .name   = "prioclass",
1276                 .type   = FIO_OPT_INT,
1277                 .cb     = str_prioclass_cb,
1278                 .help   = "Set job IO priority class",
1279                 .minval = 0,
1280                 .maxval = 3,
1281         },
1282 #endif
1283         {
1284                 .name   = "thinktime",
1285                 .type   = FIO_OPT_INT,
1286                 .off1   = td_var_offset(thinktime),
1287                 .help   = "Idle time between IO buffers (usec)",
1288                 .def    = "0",
1289         },
1290         {
1291                 .name   = "thinktime_spin",
1292                 .type   = FIO_OPT_INT,
1293                 .off1   = td_var_offset(thinktime_spin),
1294                 .help   = "Start think time by spinning this amount (usec)",
1295                 .def    = "0",
1296                 .parent = "thinktime",
1297         },
1298         {
1299                 .name   = "thinktime_blocks",
1300                 .type   = FIO_OPT_INT,
1301                 .off1   = td_var_offset(thinktime_blocks),
1302                 .help   = "IO buffer period between 'thinktime'",
1303                 .def    = "1",
1304                 .parent = "thinktime",
1305         },
1306         {
1307                 .name   = "rate",
1308                 .type   = FIO_OPT_INT,
1309                 .off1   = td_var_offset(rate[0]),
1310                 .off2   = td_var_offset(rate[1]),
1311                 .help   = "Set bandwidth rate",
1312         },
1313         {
1314                 .name   = "ratemin",
1315                 .type   = FIO_OPT_INT,
1316                 .off1   = td_var_offset(ratemin[0]),
1317                 .off2   = td_var_offset(ratemin[1]),
1318                 .help   = "Job must meet this rate or it will be shutdown",
1319                 .parent = "rate",
1320         },
1321         {
1322                 .name   = "rate_iops",
1323                 .type   = FIO_OPT_INT,
1324                 .off1   = td_var_offset(rate_iops[0]),
1325                 .off2   = td_var_offset(rate_iops[1]),
1326                 .help   = "Limit IO used to this number of IO operations/sec",
1327         },
1328         {
1329                 .name   = "rate_iops_min",
1330                 .type   = FIO_OPT_INT,
1331                 .off1   = td_var_offset(rate_iops_min[0]),
1332                 .off2   = td_var_offset(rate_iops_min[1]),
1333                 .help   = "Job must meet this rate or it will be shutdown",
1334                 .parent = "rate_iops",
1335         },
1336         {
1337                 .name   = "ratecycle",
1338                 .type   = FIO_OPT_INT,
1339                 .off1   = td_var_offset(ratecycle),
1340                 .help   = "Window average for rate limits (msec)",
1341                 .def    = "1000",
1342                 .parent = "rate",
1343         },
1344         {
1345                 .name   = "invalidate",
1346                 .type   = FIO_OPT_BOOL,
1347                 .off1   = td_var_offset(invalidate_cache),
1348                 .help   = "Invalidate buffer/page cache prior to running job",
1349                 .def    = "1",
1350         },
1351         {
1352                 .name   = "sync",
1353                 .type   = FIO_OPT_BOOL,
1354                 .off1   = td_var_offset(sync_io),
1355                 .help   = "Use O_SYNC for buffered writes",
1356                 .def    = "0",
1357                 .parent = "buffered",
1358         },
1359         {
1360                 .name   = "bwavgtime",
1361                 .type   = FIO_OPT_INT,
1362                 .off1   = td_var_offset(bw_avg_time),
1363                 .help   = "Time window over which to calculate bandwidth"
1364                           " (msec)",
1365                 .def    = "500",
1366         },
1367         {
1368                 .name   = "create_serialize",
1369                 .type   = FIO_OPT_BOOL,
1370                 .off1   = td_var_offset(create_serialize),
1371                 .help   = "Serialize creating of job files",
1372                 .def    = "1",
1373         },
1374         {
1375                 .name   = "create_fsync",
1376                 .type   = FIO_OPT_BOOL,
1377                 .off1   = td_var_offset(create_fsync),
1378                 .help   = "Fsync file after creation",
1379                 .def    = "1",
1380         },
1381         {
1382                 .name   = "create_on_open",
1383                 .type   = FIO_OPT_BOOL,
1384                 .off1   = td_var_offset(create_on_open),
1385                 .help   = "Create files when they are opened for IO",
1386                 .def    = "0",
1387         },
1388         {
1389                 .name   = "pre_read",
1390                 .type   = FIO_OPT_BOOL,
1391                 .off1   = td_var_offset(pre_read),
1392                 .help   = "Preread files before starting official testing",
1393                 .def    = "0",
1394         },
1395         {
1396                 .name   = "cpuload",
1397                 .type   = FIO_OPT_INT,
1398                 .off1   = td_var_offset(cpuload),
1399                 .help   = "Use this percentage of CPU",
1400         },
1401         {
1402                 .name   = "cpuchunks",
1403                 .type   = FIO_OPT_INT,
1404                 .off1   = td_var_offset(cpucycle),
1405                 .help   = "Length of the CPU burn cycles (usecs)",
1406                 .def    = "50000",
1407                 .parent = "cpuload",
1408         },
1409 #ifdef FIO_HAVE_CPU_AFFINITY
1410         {
1411                 .name   = "cpumask",
1412                 .type   = FIO_OPT_INT,
1413                 .cb     = str_cpumask_cb,
1414                 .help   = "CPU affinity mask",
1415         },
1416         {
1417                 .name   = "cpus_allowed",
1418                 .type   = FIO_OPT_STR,
1419                 .cb     = str_cpus_allowed_cb,
1420                 .help   = "Set CPUs allowed",
1421         },
1422 #endif
1423         {
1424                 .name   = "end_fsync",
1425                 .type   = FIO_OPT_BOOL,
1426                 .off1   = td_var_offset(end_fsync),
1427                 .help   = "Include fsync at the end of job",
1428                 .def    = "0",
1429         },
1430         {
1431                 .name   = "fsync_on_close",
1432                 .type   = FIO_OPT_BOOL,
1433                 .off1   = td_var_offset(fsync_on_close),
1434                 .help   = "fsync files on close",
1435                 .def    = "0",
1436         },
1437         {
1438                 .name   = "unlink",
1439                 .type   = FIO_OPT_BOOL,
1440                 .off1   = td_var_offset(unlink),
1441                 .help   = "Unlink created files after job has completed",
1442                 .def    = "0",
1443         },
1444         {
1445                 .name   = "exitall",
1446                 .type   = FIO_OPT_STR_SET,
1447                 .cb     = str_exitall_cb,
1448                 .help   = "Terminate all jobs when one exits",
1449         },
1450         {
1451                 .name   = "stonewall",
1452                 .type   = FIO_OPT_STR_SET,
1453                 .off1   = td_var_offset(stonewall),
1454                 .help   = "Insert a hard barrier between this job and previous",
1455         },
1456         {
1457                 .name   = "new_group",
1458                 .type   = FIO_OPT_STR_SET,
1459                 .off1   = td_var_offset(new_group),
1460                 .help   = "Mark the start of a new group (for reporting)",
1461         },
1462         {
1463                 .name   = "thread",
1464                 .type   = FIO_OPT_STR_SET,
1465                 .off1   = td_var_offset(use_thread),
1466                 .help   = "Use threads instead of forks",
1467         },
1468         {
1469                 .name   = "write_bw_log",
1470                 .type   = FIO_OPT_STR,
1471                 .off1   = td_var_offset(write_bw_log),
1472                 .cb     = str_write_bw_log_cb,
1473                 .help   = "Write log of bandwidth during run",
1474         },
1475         {
1476                 .name   = "write_lat_log",
1477                 .type   = FIO_OPT_STR,
1478                 .off1   = td_var_offset(write_lat_log),
1479                 .cb     = str_write_lat_log_cb,
1480                 .help   = "Write log of latency during run",
1481         },
1482         {
1483                 .name   = "hugepage-size",
1484                 .type   = FIO_OPT_INT,
1485                 .off1   = td_var_offset(hugepage_size),
1486                 .help   = "When using hugepages, specify size of each page",
1487                 .def    = __stringify(FIO_HUGE_PAGE),
1488         },
1489         {
1490                 .name   = "group_reporting",
1491                 .type   = FIO_OPT_STR_SET,
1492                 .off1   = td_var_offset(group_reporting),
1493                 .help   = "Do reporting on a per-group basis",
1494         },
1495         {
1496                 .name   = "zero_buffers",
1497                 .type   = FIO_OPT_STR_SET,
1498                 .off1   = td_var_offset(zero_buffers),
1499                 .help   = "Init IO buffers to all zeroes",
1500         },
1501         {
1502                 .name   = "refill_buffers",
1503                 .type   = FIO_OPT_STR_SET,
1504                 .off1   = td_var_offset(refill_buffers),
1505                 .help   = "Refill IO buffers on every IO submit",
1506         },
1507 #ifdef FIO_HAVE_DISK_UTIL
1508         {
1509                 .name   = "disk_util",
1510                 .type   = FIO_OPT_BOOL,
1511                 .off1   = td_var_offset(do_disk_util),
1512                 .help   = "Log disk utilization statistics",
1513                 .def    = "1",
1514         },
1515 #endif
1516         {
1517                 .name   = "gtod_reduce",
1518                 .type   = FIO_OPT_BOOL,
1519                 .help   = "Greatly reduce number of gettimeofday() calls",
1520                 .cb     = str_gtod_reduce_cb,
1521                 .def    = "0",
1522         },
1523         {
1524                 .name   = "disable_clat",
1525                 .type   = FIO_OPT_BOOL,
1526                 .off1   = td_var_offset(disable_clat),
1527                 .help   = "Disable completion latency numbers",
1528                 .parent = "gtod_reduce",
1529                 .def    = "0",
1530         },
1531         {
1532                 .name   = "disable_slat",
1533                 .type   = FIO_OPT_BOOL,
1534                 .off1   = td_var_offset(disable_slat),
1535                 .help   = "Disable submissionn latency numbers",
1536                 .parent = "gtod_reduce",
1537                 .def    = "0",
1538         },
1539         {
1540                 .name   = "disable_bw_measurement",
1541                 .type   = FIO_OPT_BOOL,
1542                 .off1   = td_var_offset(disable_bw),
1543                 .help   = "Disable bandwidth logging",
1544                 .parent = "gtod_reduce",
1545                 .def    = "0",
1546         },
1547         {
1548                 .name   = "gtod_cpu",
1549                 .type   = FIO_OPT_INT,
1550                 .cb     = str_gtod_cpu_cb,
1551                 .help   = "Setup dedicated gettimeofday() thread on this CPU",
1552                 .verify = gtod_cpu_verify,
1553         },
1554         {
1555                 .name   = "continue_on_error",
1556                 .type   = FIO_OPT_BOOL,
1557                 .off1   = td_var_offset(continue_on_error),
1558                 .help   = "Continue on non-fatal errors during I/O",
1559                 .def    = "0",
1560         },
1561         {
1562                 .name = NULL,
1563         },
1564 };
1565
1566 void fio_options_dup_and_init(struct option *long_options)
1567 {
1568         struct fio_option *o;
1569         unsigned int i;
1570
1571         options_init(options);
1572
1573         i = 0;
1574         while (long_options[i].name)
1575                 i++;
1576
1577         o = &options[0];
1578         while (o->name) {
1579                 long_options[i].name = (char *) o->name;
1580                 long_options[i].val = FIO_GETOPT_JOB;
1581                 if (o->type == FIO_OPT_STR_SET)
1582                         long_options[i].has_arg = no_argument;
1583                 else
1584                         long_options[i].has_arg = required_argument;
1585
1586                 i++;
1587                 o++;
1588                 assert(i < FIO_NR_OPTIONS);
1589         }
1590 }
1591
1592 int fio_options_parse(struct thread_data *td, char **opts, int num_opts)
1593 {
1594         int i, ret;
1595
1596         sort_options(opts, options, num_opts);
1597
1598         for (ret = 0, i = 0; i < num_opts; i++)
1599                 ret |= parse_option(opts[i], options, td);
1600
1601         return ret;
1602 }
1603
1604 int fio_cmd_option_parse(struct thread_data *td, const char *opt, char *val)
1605 {
1606         return parse_cmd_option(opt, val, options, td);
1607 }
1608
1609 void fio_fill_default_options(struct thread_data *td)
1610 {
1611         fill_default_options(td, options);
1612 }
1613
1614 int fio_show_option_help(const char *opt)
1615 {
1616         return show_cmd_help(options, opt);
1617 }
1618
1619 static void __options_mem(struct thread_data *td, int alloc)
1620 {
1621         struct thread_options *o = &td->o;
1622         struct fio_option *opt;
1623         char **ptr;
1624         int i;
1625
1626         for (i = 0, opt = &options[0]; opt->name; i++, opt = &options[i]) {
1627                 if (opt->type != FIO_OPT_STR_STORE)
1628                         continue;
1629
1630                 ptr = (void *) o + opt->off1;
1631                 if (*ptr) {
1632                         if (alloc)
1633                                 *ptr = strdup(*ptr);
1634                         else {
1635                                 free(*ptr);
1636                                 *ptr = NULL;
1637                         }
1638                 }
1639         }
1640 }
1641
1642 /*
1643  * dupe FIO_OPT_STR_STORE options
1644  */
1645 void options_mem_dupe(struct thread_data *td)
1646 {
1647         __options_mem(td, 1);
1648 }
1649
1650 void options_mem_free(struct thread_data fio_unused *td)
1651 {
1652 #if 0
1653         __options_mem(td, 0);
1654 #endif
1655 }