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