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 #define __stringify_1(x)        #x
 592 #define __stringify(x)          __stringify_1(x)
 593
 594 /*
 595  * Map of job/command line options
 596  */
 597 static struct fio_option options[] = {
 598         {
 599                 .name   = "description",
 600                 .type   = FIO_OPT_STR_STORE,
 601                 .off1   = td_var_offset(description),
 602                 .help   = "Text job description",
 603         },
 604         {
 605                 .name   = "name",
 606                 .type   = FIO_OPT_STR_STORE,
 607                 .off1   = td_var_offset(name),
 608                 .help   = "Name of this job",
 609         },
 610         {
 611                 .name   = "directory",
 612                 .type   = FIO_OPT_STR_STORE,
 613                 .off1   = td_var_offset(directory),
 614                 .cb     = str_directory_cb,
 615                 .help   = "Directory to store files in",
 616         },
 617         {
 618                 .name   = "filename",
 619                 .type   = FIO_OPT_STR_STORE,
 620                 .off1   = td_var_offset(filename),
 621                 .cb     = str_filename_cb,
 622                 .prio   = -1, /* must come after "directory" */
 623                 .help   = "File(s) to use for the workload",
 624         },
 625         {
 626                 .name   = "lockfile",
 627                 .type   = FIO_OPT_STR,
 628                 .cb     = str_lockfile_cb,
 629                 .off1   = td_var_offset(file_lock_mode),
 630                 .help   = "Lock file when doing IO to it",
 631                 .parent = "filename",
 632                 .def    = "none",
 633                 .posval = {
 634                           { .ival = "none",
 635                             .oval = FILE_LOCK_NONE,
 636                             .help = "No file locking",
 637                           },
 638                           { .ival = "exclusive",
 639                             .oval = FILE_LOCK_EXCLUSIVE,
 640                             .help = "Exclusive file lock",
 641                           },
 642                           {
 643                             .ival = "readwrite",
 644                             .oval = FILE_LOCK_READWRITE,
 645                             .help = "Read vs write lock",
 646                           },
 647                 },
 648         },
 649         {
 650                 .name   = "opendir",
 651                 .type   = FIO_OPT_STR_STORE,
 652                 .off1   = td_var_offset(opendir),
 653                 .cb     = str_opendir_cb,
 654                 .help   = "Recursively add files from this directory and down",
 655         },
 656         {
 657                 .name   = "rw",
 658                 .alias  = "readwrite",
 659                 .type   = FIO_OPT_STR,
 660                 .cb     = str_rw_cb,
 661                 .off1   = td_var_offset(td_ddir),
 662                 .help   = "IO direction",
 663                 .def    = "read",
 664                 .verify = rw_verify,
 665                 .posval = {
 666                           { .ival = "read",
 667                             .oval = TD_DDIR_READ,
 668                             .help = "Sequential read",
 669                           },
 670                           { .ival = "write",
 671                             .oval = TD_DDIR_WRITE,
 672                             .help = "Sequential write",
 673                           },
 674                           { .ival = "randread",
 675                             .oval = TD_DDIR_RANDREAD,
 676                             .help = "Random read",
 677                           },
 678                           { .ival = "randwrite",
 679                             .oval = TD_DDIR_RANDWRITE,
 680                             .help = "Random write",
 681                           },
 682                           { .ival = "rw",
 683                             .oval = TD_DDIR_RW,
 684                             .help = "Sequential read and write mix",
 685                           },
 686                           { .ival = "randrw",
 687                             .oval = TD_DDIR_RANDRW,
 688                             .help = "Random read and write mix"
 689                           },
 690                 },
 691         },
 692         {
 693                 .name   = "ioengine",
 694                 .type   = FIO_OPT_STR_STORE,
 695                 .off1   = td_var_offset(ioengine),
 696                 .help   = "IO engine to use",
 697                 .def    = "sync",
 698                 .posval = {
 699                           { .ival = "sync",
 700                             .help = "Use read/write",
 701                           },
 702                           { .ival = "psync",
 703                             .help = "Use pread/pwrite",
 704                           },
 705                           { .ival = "vsync",
 706                              .help = "Use readv/writev",
 707                           },
 708 #ifdef FIO_HAVE_LIBAIO
 709                           { .ival = "libaio",
 710                             .help = "Linux native asynchronous IO",
 711                           },
 712 #endif
 713 #ifdef FIO_HAVE_POSIXAIO
 714                           { .ival = "posixaio",
 715                             .help = "POSIX asynchronous IO",
 716                           },
 717 #endif
 718 #ifdef FIO_HAVE_SOLARISAIO
 719                           { .ival = "solarisaio",
 720                             .help = "Solaris native asynchronous IO",
 721                           },
 722 #endif
 723                           { .ival = "mmap",
 724                             .help = "Memory mapped IO",
 725                           },
 726 #ifdef FIO_HAVE_SPLICE
 727                           { .ival = "splice",
 728                             .help = "splice/vmsplice based IO",
 729                           },
 730                           { .ival = "netsplice",
 731                             .help = "splice/vmsplice to/from the network",
 732                           },
 733 #endif
 734 #ifdef FIO_HAVE_SGIO
 735                           { .ival = "sg",
 736                             .help = "SCSI generic v3 IO",
 737                           },
 738 #endif
 739                           { .ival = "null",
 740                             .help = "Testing engine (no data transfer)",
 741                           },
 742                           { .ival = "net",
 743                             .help = "Network IO",
 744                           },
 745 #ifdef FIO_HAVE_SYSLET
 746                           { .ival = "syslet-rw",
 747                             .help = "syslet enabled async pread/pwrite IO",
 748                           },
 749 #endif
 750                           { .ival = "cpuio",
 751                             .help = "CPU cycler burner engine",
 752                           },
 753 #ifdef FIO_HAVE_GUASI
 754                           { .ival = "guasi",
 755                             .help = "GUASI IO engine",
 756                           },
 757 #endif
 758                           { .ival = "external",
 759                             .help = "Load external engine (append name)",
 760                           },
 761                 },
 762         },
 763         {
 764                 .name   = "iodepth",
 765                 .type   = FIO_OPT_INT,
 766                 .off1   = td_var_offset(iodepth),
 767                 .help   = "Amount of IO buffers to keep in flight",
 768                 .minval = 1,
 769                 .def    = "1",
 770         },
 771         {
 772                 .name   = "iodepth_batch",
 773                 .alias  = "iodepth_batch_submit",
 774                 .type   = FIO_OPT_INT,
 775                 .off1   = td_var_offset(iodepth_batch),
 776                 .help   = "Number of IO buffers to submit in one go",
 777                 .parent = "iodepth",
 778                 .minval = 1,
 779                 .def    = "1",
 780         },
 781         {
 782                 .name   = "iodepth_batch_complete",
 783                 .type   = FIO_OPT_INT,
 784                 .off1   = td_var_offset(iodepth_batch_complete),
 785                 .help   = "Number of IO buffers to retrieve in one go",
 786                 .parent = "iodepth",
 787                 .minval = 0,
 788                 .def    = "1",
 789         },
 790         {
 791                 .name   = "iodepth_low",
 792                 .type   = FIO_OPT_INT,
 793                 .off1   = td_var_offset(iodepth_low),
 794                 .help   = "Low water mark for queuing depth",
 795                 .parent = "iodepth",
 796         },
 797         {
 798                 .name   = "size",
 799                 .type   = FIO_OPT_STR_VAL,
 800                 .off1   = td_var_offset(size),
 801                 .minval = 1,
 802                 .help   = "Total size of device or files",
 803         },
 804         {
 805                 .name   = "fill_device",
 806                 .type   = FIO_OPT_BOOL,
 807                 .off1   = td_var_offset(fill_device),
 808                 .help   = "Write until an ENOSPC error occurs",
 809                 .def    = "0",
 810         },
 811         {
 812                 .name   = "filesize",
 813                 .type   = FIO_OPT_STR_VAL,
 814                 .off1   = td_var_offset(file_size_low),
 815                 .off2   = td_var_offset(file_size_high),
 816                 .minval = 1,
 817                 .help   = "Size of individual files",
 818         },
 819         {
 820                 .name   = "offset",
 821                 .alias  = "fileoffset",
 822                 .type   = FIO_OPT_STR_VAL,
 823                 .off1   = td_var_offset(start_offset),
 824                 .help   = "Start IO from this offset",
 825                 .def    = "0",
 826         },
 827         {
 828                 .name   = "bs",
 829                 .alias  = "blocksize",
 830                 .type   = FIO_OPT_INT,
 831                 .off1   = td_var_offset(bs[DDIR_READ]),
 832                 .off2   = td_var_offset(bs[DDIR_WRITE]),
 833                 .minval = 1,
 834                 .help   = "Block size unit",
 835                 .def    = "4k",
 836                 .parent = "rw",
 837         },
 838         {
 839                 .name   = "ba",
 840                 .alias  = "blockalign",
 841                 .type   = FIO_OPT_INT,
 842                 .off1   = td_var_offset(ba[DDIR_READ]),
 843                 .off2   = td_var_offset(ba[DDIR_WRITE]),
 844                 .minval = 1,
 845                 .help   = "IO block offset alignment",
 846                 .parent = "rw",
 847         },
 848         {
 849                 .name   = "bsrange",
 850                 .alias  = "blocksize_range",
 851                 .type   = FIO_OPT_RANGE,
 852                 .off1   = td_var_offset(min_bs[DDIR_READ]),
 853                 .off2   = td_var_offset(max_bs[DDIR_READ]),
 854                 .off3   = td_var_offset(min_bs[DDIR_WRITE]),
 855                 .off4   = td_var_offset(max_bs[DDIR_WRITE]),
 856                 .minval = 1,
 857                 .help   = "Set block size range (in more detail than bs)",
 858                 .parent = "rw",
 859         },
 860         {
 861                 .name   = "bssplit",
 862                 .type   = FIO_OPT_STR,
 863                 .cb     = str_bssplit_cb,
 864                 .help   = "Set a specific mix of block sizes",
 865                 .parent = "rw",
 866         },
 867         {
 868                 .name   = "bs_unaligned",
 869                 .alias  = "blocksize_unaligned",
 870                 .type   = FIO_OPT_STR_SET,
 871                 .off1   = td_var_offset(bs_unaligned),
 872                 .help   = "Don't sector align IO buffer sizes",
 873                 .parent = "rw",
 874         },
 875         {
 876                 .name   = "randrepeat",
 877                 .type   = FIO_OPT_BOOL,
 878                 .off1   = td_var_offset(rand_repeatable),
 879                 .help   = "Use repeatable random IO pattern",
 880                 .def    = "1",
 881                 .parent = "rw",
 882         },
 883         {
 884                 .name   = "norandommap",
 885                 .type   = FIO_OPT_STR_SET,
 886                 .off1   = td_var_offset(norandommap),
 887                 .help   = "Accept potential duplicate random blocks",
 888                 .parent = "rw",
 889         },
 890         {
 891                 .name   = "softrandommap",
 892                 .type   = FIO_OPT_BOOL,
 893                 .off1   = td_var_offset(softrandommap),
 894                 .help   = "Set norandommap if randommap allocation fails",
 895                 .parent = "norandommap",
 896                 .def    = "0",
 897         },
 898         {
 899                 .name   = "nrfiles",
 900                 .type   = FIO_OPT_INT,
 901                 .off1   = td_var_offset(nr_files),
 902                 .help   = "Split job workload between this number of files",
 903                 .def    = "1",
 904         },
 905         {
 906                 .name   = "openfiles",
 907                 .type   = FIO_OPT_INT,
 908                 .off1   = td_var_offset(open_files),
 909                 .help   = "Number of files to keep open at the same time",
 910         },
 911         {
 912                 .name   = "file_service_type",
 913                 .type   = FIO_OPT_STR,
 914                 .cb     = str_fst_cb,
 915                 .off1   = td_var_offset(file_service_type),
 916                 .help   = "How to select which file to service next",
 917                 .def    = "roundrobin",
 918                 .posval = {
 919                           { .ival = "random",
 920                             .oval = FIO_FSERVICE_RANDOM,
 921                             .help = "Choose a file at random",
 922                           },
 923                           { .ival = "roundrobin",
 924                             .oval = FIO_FSERVICE_RR,
 925                             .help = "Round robin select files",
 926                           },
 927                           { .ival = "sequential",
 928                             .oval = FIO_FSERVICE_SEQ,
 929                             .help = "Finish one file before moving to the next",
 930                           },
 931                 },
 932                 .parent = "nrfiles",
 933         },
 934         {
 935                 .name   = "fadvise_hint",
 936                 .type   = FIO_OPT_BOOL,
 937                 .off1   = td_var_offset(fadvise_hint),
 938                 .help   = "Use fadvise() to advise the kernel on IO pattern",
 939                 .def    = "1",
 940         },
 941         {
 942                 .name   = "fsync",
 943                 .type   = FIO_OPT_INT,
 944                 .off1   = td_var_offset(fsync_blocks),
 945                 .help   = "Issue fsync for writes every given number of blocks",
 946                 .def    = "0",
 947         },
 948         {
 949                 .name   = "fdatasync",
 950                 .type   = FIO_OPT_INT,
 951                 .off1   = td_var_offset(fdatasync_blocks),
 952                 .help   = "Issue fdatasync for writes every given number of blocks",
 953                 .def    = "0",
 954         },
 955         {
 956                 .name   = "direct",
 957                 .type   = FIO_OPT_BOOL,
 958                 .off1   = td_var_offset(odirect),
 959                 .help   = "Use O_DIRECT IO (negates buffered)",
 960                 .def    = "0",
 961         },
 962         {
 963                 .name   = "buffered",
 964                 .type   = FIO_OPT_BOOL,
 965                 .off1   = td_var_offset(odirect),
 966                 .neg    = 1,
 967                 .help   = "Use buffered IO (negates direct)",
 968                 .def    = "1",
 969         },
 970         {
 971                 .name   = "overwrite",
 972                 .type   = FIO_OPT_BOOL,
 973                 .off1   = td_var_offset(overwrite),
 974                 .help   = "When writing, set whether to overwrite current data",
 975                 .def    = "0",
 976         },
 977         {
 978                 .name   = "loops",
 979                 .type   = FIO_OPT_INT,
 980                 .off1   = td_var_offset(loops),
 981                 .help   = "Number of times to run the job",
 982                 .def    = "1",
 983         },
 984         {
 985                 .name   = "numjobs",
 986                 .type   = FIO_OPT_INT,
 987                 .off1   = td_var_offset(numjobs),
 988                 .help   = "Duplicate this job this many times",
 989                 .def    = "1",
 990         },
 991         {
 992                 .name   = "startdelay",
 993                 .type   = FIO_OPT_INT,
 994                 .off1   = td_var_offset(start_delay),
 995                 .help   = "Only start job when this period has passed",
 996                 .def    = "0",
 997         },
 998         {
 999                 .name   = "runtime",
1000                 .alias  = "timeout",
1001                 .type   = FIO_OPT_STR_VAL_TIME,
1002                 .off1   = td_var_offset(timeout),
1003                 .help   = "Stop workload when this amount of time has passed",
1004                 .def    = "0",
1005         },
1006         {
1007                 .name   = "time_based",
1008                 .type   = FIO_OPT_STR_SET,
1009                 .off1   = td_var_offset(time_based),
1010                 .help   = "Keep running until runtime/timeout is met",
1011         },
1012         {
1013                 .name   = "ramp_time",
1014                 .type   = FIO_OPT_STR_VAL_TIME,
1015                 .off1   = td_var_offset(ramp_time),
1016                 .help   = "Ramp up time before measuring performance",
1017         },
1018         {
1019                 .name   = "mem",
1020                 .alias  = "iomem",
1021                 .type   = FIO_OPT_STR,
1022                 .cb     = str_mem_cb,
1023                 .off1   = td_var_offset(mem_type),
1024                 .help   = "Backing type for IO buffers",
1025                 .def    = "malloc",
1026                 .posval = {
1027                           { .ival = "malloc",
1028                             .oval = MEM_MALLOC,
1029                             .help = "Use malloc(3) for IO buffers",
1030                           },
1031                           { .ival = "shm",
1032                             .oval = MEM_SHM,
1033                             .help = "Use shared memory segments for IO buffers",
1034                           },
1035 #ifdef FIO_HAVE_HUGETLB
1036                           { .ival = "shmhuge",
1037                             .oval = MEM_SHMHUGE,
1038                             .help = "Like shm, but use huge pages",
1039                           },
1040 #endif
1041                           { .ival = "mmap",
1042                             .oval = MEM_MMAP,
1043                             .help = "Use mmap(2) (file or anon) for IO buffers",
1044                           },
1045 #ifdef FIO_HAVE_HUGETLB
1046                           { .ival = "mmaphuge",
1047                             .oval = MEM_MMAPHUGE,
1048                             .help = "Like mmap, but use huge pages",
1049                           },
1050 #endif
1051                   },
1052         },
1053         {
1054                 .name   = "iomem_align",
1055                 .alias  = "mem_align",
1056                 .type   = FIO_OPT_INT,
1057                 .off1   = td_var_offset(mem_align),
1058                 .minval = 0,
1059                 .help   = "IO memory buffer offset alignment",
1060                 .def    = "0",
1061                 .parent = "iomem",
1062         },
1063         {
1064                 .name   = "verify",
1065                 .type   = FIO_OPT_STR,
1066                 .off1   = td_var_offset(verify),
1067                 .help   = "Verify data written",
1068                 .def    = "0",
1069                 .posval = {
1070                           { .ival = "0",
1071                             .oval = VERIFY_NONE,
1072                             .help = "Don't do IO verification",
1073                           },
1074                           { .ival = "md5",
1075                             .oval = VERIFY_MD5,
1076                             .help = "Use md5 checksums for verification",
1077                           },
1078                           { .ival = "crc64",
1079                             .oval = VERIFY_CRC64,
1080                             .help = "Use crc64 checksums for verification",
1081                           },
1082                           { .ival = "crc32",
1083                             .oval = VERIFY_CRC32,
1084                             .help = "Use crc32 checksums for verification",
1085                           },
1086                           { .ival = "crc32c-intel",
1087                             .oval = VERIFY_CRC32C_INTEL,
1088                             .help = "Use hw crc32c checksums for verification",
1089                           },
1090                           { .ival = "crc32c",
1091                             .oval = VERIFY_CRC32C,
1092                             .help = "Use crc32c checksums for verification",
1093                           },
1094                           { .ival = "crc16",
1095                             .oval = VERIFY_CRC16,
1096                             .help = "Use crc16 checksums for verification",
1097                           },
1098                           { .ival = "crc7",
1099                             .oval = VERIFY_CRC7,
1100                             .help = "Use crc7 checksums for verification",
1101                           },
1102                           { .ival = "sha256",
1103                             .oval = VERIFY_SHA256,
1104                             .help = "Use sha256 checksums for verification",
1105                           },
1106                           { .ival = "sha512",
1107                             .oval = VERIFY_SHA512,
1108                             .help = "Use sha512 checksums for verification",
1109                           },
1110                           { .ival = "meta",
1111                             .oval = VERIFY_META,
1112                             .help = "Use io information",
1113                           },
1114                           {
1115                             .ival = "null",
1116                             .oval = VERIFY_NULL,
1117                             .help = "Pretend to verify",
1118                           },
1119                 },
1120         },
1121         {
1122                 .name   = "do_verify",
1123                 .type   = FIO_OPT_BOOL,
1124                 .off1   = td_var_offset(do_verify),
1125                 .help   = "Run verification stage after write",
1126                 .def    = "1",
1127                 .parent = "verify",
1128         },
1129         {
1130                 .name   = "verifysort",
1131                 .type   = FIO_OPT_BOOL,
1132                 .off1   = td_var_offset(verifysort),
1133                 .help   = "Sort written verify blocks for read back",
1134                 .def    = "1",
1135                 .parent = "verify",
1136         },
1137         {
1138                 .name   = "verify_interval",
1139                 .type   = FIO_OPT_INT,
1140                 .off1   = td_var_offset(verify_interval),
1141                 .minval = 2 * sizeof(struct verify_header),
1142                 .help   = "Store verify buffer header every N bytes",
1143                 .parent = "verify",
1144         },
1145         {
1146                 .name   = "verify_offset",
1147                 .type   = FIO_OPT_INT,
1148                 .help   = "Offset verify header location by N bytes",
1149                 .def    = "0",
1150                 .cb     = str_verify_offset_cb,
1151                 .parent = "verify",
1152         },
1153         {
1154                 .name   = "verify_pattern",
1155                 .type   = FIO_OPT_INT,
1156                 .cb     = str_verify_pattern_cb,
1157                 .help   = "Fill pattern for IO buffers",
1158                 .parent = "verify",
1159         },
1160         {
1161                 .name   = "verify_fatal",
1162                 .type   = FIO_OPT_BOOL,
1163                 .off1   = td_var_offset(verify_fatal),
1164                 .def    = "0",
1165                 .help   = "Exit on a single verify failure, don't continue",
1166                 .parent = "verify",
1167         },
1168         {
1169                 .name   = "write_iolog",
1170                 .type   = FIO_OPT_STR_STORE,
1171                 .off1   = td_var_offset(write_iolog_file),
1172                 .help   = "Store IO pattern to file",
1173         },
1174         {
1175                 .name   = "read_iolog",
1176                 .type   = FIO_OPT_STR_STORE,
1177                 .off1   = td_var_offset(read_iolog_file),
1178                 .help   = "Playback IO pattern from file",
1179         },
1180         {
1181                 .name   = "exec_prerun",
1182                 .type   = FIO_OPT_STR_STORE,
1183                 .off1   = td_var_offset(exec_prerun),
1184                 .help   = "Execute this file prior to running job",
1185         },
1186         {
1187                 .name   = "exec_postrun",
1188                 .type   = FIO_OPT_STR_STORE,
1189                 .off1   = td_var_offset(exec_postrun),
1190                 .help   = "Execute this file after running job",
1191         },
1192 #ifdef FIO_HAVE_IOSCHED_SWITCH
1193         {
1194                 .name   = "ioscheduler",
1195                 .type   = FIO_OPT_STR_STORE,
1196                 .off1   = td_var_offset(ioscheduler),
1197                 .help   = "Use this IO scheduler on the backing device",
1198         },
1199 #endif
1200         {
1201                 .name   = "zonesize",
1202                 .type   = FIO_OPT_STR_VAL,
1203                 .off1   = td_var_offset(zone_size),
1204                 .help   = "Give size of an IO zone",
1205                 .def    = "0",
1206         },
1207         {
1208                 .name   = "zoneskip",
1209                 .type   = FIO_OPT_STR_VAL,
1210                 .off1   = td_var_offset(zone_skip),
1211                 .help   = "Space between IO zones",
1212                 .def    = "0",
1213         },
1214         {
1215                 .name   = "lockmem",
1216                 .type   = FIO_OPT_STR_VAL,
1217                 .cb     = str_lockmem_cb,
1218                 .help   = "Lock down this amount of memory",
1219                 .def    = "0",
1220         },
1221         {
1222                 .name   = "rwmixread",
1223                 .type   = FIO_OPT_INT,
1224                 .cb     = str_rwmix_read_cb,
1225                 .maxval = 100,
1226                 .help   = "Percentage of mixed workload that is reads",
1227                 .def    = "50",
1228         },
1229         {
1230                 .name   = "rwmixwrite",
1231                 .type   = FIO_OPT_INT,
1232                 .cb     = str_rwmix_write_cb,
1233                 .maxval = 100,
1234                 .help   = "Percentage of mixed workload that is writes",
1235                 .def    = "50",
1236         },
1237         {
1238                 .name   = "rwmixcycle",
1239                 .type   = FIO_OPT_DEPRECATED,
1240         },
1241         {
1242                 .name   = "nice",
1243                 .type   = FIO_OPT_INT,
1244                 .off1   = td_var_offset(nice),
1245                 .help   = "Set job CPU nice value",
1246                 .minval = -19,
1247                 .maxval = 20,
1248                 .def    = "0",
1249         },
1250 #ifdef FIO_HAVE_IOPRIO
1251         {
1252                 .name   = "prio",
1253                 .type   = FIO_OPT_INT,
1254                 .cb     = str_prio_cb,
1255                 .help   = "Set job IO priority value",
1256                 .minval = 0,
1257                 .maxval = 7,
1258         },
1259         {
1260                 .name   = "prioclass",
1261                 .type   = FIO_OPT_INT,
1262                 .cb     = str_prioclass_cb,
1263                 .help   = "Set job IO priority class",
1264                 .minval = 0,
1265                 .maxval = 3,
1266         },
1267 #endif
1268         {
1269                 .name   = "thinktime",
1270                 .type   = FIO_OPT_INT,
1271                 .off1   = td_var_offset(thinktime),
1272                 .help   = "Idle time between IO buffers (usec)",
1273                 .def    = "0",
1274         },
1275         {
1276                 .name   = "thinktime_spin",
1277                 .type   = FIO_OPT_INT,
1278                 .off1   = td_var_offset(thinktime_spin),
1279                 .help   = "Start think time by spinning this amount (usec)",
1280                 .def    = "0",
1281                 .parent = "thinktime",
1282         },
1283         {
1284                 .name   = "thinktime_blocks",
1285                 .type   = FIO_OPT_INT,
1286                 .off1   = td_var_offset(thinktime_blocks),
1287                 .help   = "IO buffer period between 'thinktime'",
1288                 .def    = "1",
1289                 .parent = "thinktime",
1290         },
1291         {
1292                 .name   = "rate",
1293                 .type   = FIO_OPT_INT,
1294                 .off1   = td_var_offset(rate[0]),
1295                 .off2   = td_var_offset(rate[1]),
1296                 .help   = "Set bandwidth rate",
1297         },
1298         {
1299                 .name   = "ratemin",
1300                 .type   = FIO_OPT_INT,
1301                 .off1   = td_var_offset(ratemin[0]),
1302                 .off2   = td_var_offset(ratemin[1]),
1303                 .help   = "Job must meet this rate or it will be shutdown",
1304                 .parent = "rate",
1305         },
1306         {
1307                 .name   = "rate_iops",
1308                 .type   = FIO_OPT_INT,
1309                 .off1   = td_var_offset(rate_iops[0]),
1310                 .off2   = td_var_offset(rate_iops[1]),
1311                 .help   = "Limit IO used to this number of IO operations/sec",
1312         },
1313         {
1314                 .name   = "rate_iops_min",
1315                 .type   = FIO_OPT_INT,
1316                 .off1   = td_var_offset(rate_iops_min[0]),
1317                 .off2   = td_var_offset(rate_iops_min[1]),
1318                 .help   = "Job must meet this rate or it will be shutdown",
1319                 .parent = "rate_iops",
1320         },
1321         {
1322                 .name   = "ratecycle",
1323                 .type   = FIO_OPT_INT,
1324                 .off1   = td_var_offset(ratecycle),
1325                 .help   = "Window average for rate limits (msec)",
1326                 .def    = "1000",
1327                 .parent = "rate",
1328         },
1329         {
1330                 .name   = "invalidate",
1331                 .type   = FIO_OPT_BOOL,
1332                 .off1   = td_var_offset(invalidate_cache),
1333                 .help   = "Invalidate buffer/page cache prior to running job",
1334                 .def    = "1",
1335         },
1336         {
1337                 .name   = "sync",
1338                 .type   = FIO_OPT_BOOL,
1339                 .off1   = td_var_offset(sync_io),
1340                 .help   = "Use O_SYNC for buffered writes",
1341                 .def    = "0",
1342                 .parent = "buffered",
1343         },
1344         {
1345                 .name   = "bwavgtime",
1346                 .type   = FIO_OPT_INT,
1347                 .off1   = td_var_offset(bw_avg_time),
1348                 .help   = "Time window over which to calculate bandwidth"
1349                           " (msec)",
1350                 .def    = "500",
1351         },
1352         {
1353                 .name   = "create_serialize",
1354                 .type   = FIO_OPT_BOOL,
1355                 .off1   = td_var_offset(create_serialize),
1356                 .help   = "Serialize creating of job files",
1357                 .def    = "1",
1358         },
1359         {
1360                 .name   = "create_fsync",
1361                 .type   = FIO_OPT_BOOL,
1362                 .off1   = td_var_offset(create_fsync),
1363                 .help   = "Fsync file after creation",
1364                 .def    = "1",
1365         },
1366         {
1367                 .name   = "create_on_open",
1368                 .type   = FIO_OPT_BOOL,
1369                 .off1   = td_var_offset(create_on_open),
1370                 .help   = "Create files when they are opened for IO",
1371                 .def    = "0",
1372         },
1373         {
1374                 .name   = "pre_read",
1375                 .type   = FIO_OPT_BOOL,
1376                 .off1   = td_var_offset(pre_read),
1377                 .help   = "Preread files before starting official testing",
1378                 .def    = "0",
1379         },
1380         {
1381                 .name   = "cpuload",
1382                 .type   = FIO_OPT_INT,
1383                 .off1   = td_var_offset(cpuload),
1384                 .help   = "Use this percentage of CPU",
1385         },
1386         {
1387                 .name   = "cpuchunks",
1388                 .type   = FIO_OPT_INT,
1389                 .off1   = td_var_offset(cpucycle),
1390                 .help   = "Length of the CPU burn cycles (usecs)",
1391                 .def    = "50000",
1392                 .parent = "cpuload",
1393         },
1394 #ifdef FIO_HAVE_CPU_AFFINITY
1395         {
1396                 .name   = "cpumask",
1397                 .type   = FIO_OPT_INT,
1398                 .cb     = str_cpumask_cb,
1399                 .help   = "CPU affinity mask",
1400         },
1401         {
1402                 .name   = "cpus_allowed",
1403                 .type   = FIO_OPT_STR,
1404                 .cb     = str_cpus_allowed_cb,
1405                 .help   = "Set CPUs allowed",
1406         },
1407 #endif
1408         {
1409                 .name   = "end_fsync",
1410                 .type   = FIO_OPT_BOOL,
1411                 .off1   = td_var_offset(end_fsync),
1412                 .help   = "Include fsync at the end of job",
1413                 .def    = "0",
1414         },
1415         {
1416                 .name   = "fsync_on_close",
1417                 .type   = FIO_OPT_BOOL,
1418                 .off1   = td_var_offset(fsync_on_close),
1419                 .help   = "fsync files on close",
1420                 .def    = "0",
1421         },
1422         {
1423                 .name   = "unlink",
1424                 .type   = FIO_OPT_BOOL,
1425                 .off1   = td_var_offset(unlink),
1426                 .help   = "Unlink created files after job has completed",
1427                 .def    = "0",
1428         },
1429         {
1430                 .name   = "exitall",
1431                 .type   = FIO_OPT_STR_SET,
1432                 .cb     = str_exitall_cb,
1433                 .help   = "Terminate all jobs when one exits",
1434         },
1435         {
1436                 .name   = "stonewall",
1437                 .type   = FIO_OPT_STR_SET,
1438                 .off1   = td_var_offset(stonewall),
1439                 .help   = "Insert a hard barrier between this job and previous",
1440         },
1441         {
1442                 .name   = "new_group",
1443                 .type   = FIO_OPT_STR_SET,
1444                 .off1   = td_var_offset(new_group),
1445                 .help   = "Mark the start of a new group (for reporting)",
1446         },
1447         {
1448                 .name   = "thread",
1449                 .type   = FIO_OPT_STR_SET,
1450                 .off1   = td_var_offset(use_thread),
1451                 .help   = "Use threads instead of forks",
1452         },
1453         {
1454                 .name   = "write_bw_log",
1455                 .type   = FIO_OPT_STR,
1456                 .off1   = td_var_offset(write_bw_log),
1457                 .cb     = str_write_bw_log_cb,
1458                 .help   = "Write log of bandwidth during run",
1459         },
1460         {
1461                 .name   = "write_lat_log",
1462                 .type   = FIO_OPT_STR,
1463                 .off1   = td_var_offset(write_lat_log),
1464                 .cb     = str_write_lat_log_cb,
1465                 .help   = "Write log of latency during run",
1466         },
1467         {
1468                 .name   = "hugepage-size",
1469                 .type   = FIO_OPT_INT,
1470                 .off1   = td_var_offset(hugepage_size),
1471                 .help   = "When using hugepages, specify size of each page",
1472                 .def    = __stringify(FIO_HUGE_PAGE),
1473         },
1474         {
1475                 .name   = "group_reporting",
1476                 .type   = FIO_OPT_STR_SET,
1477                 .off1   = td_var_offset(group_reporting),
1478                 .help   = "Do reporting on a per-group basis",
1479         },
1480         {
1481                 .name   = "zero_buffers",
1482                 .type   = FIO_OPT_STR_SET,
1483                 .off1   = td_var_offset(zero_buffers),
1484                 .help   = "Init IO buffers to all zeroes",
1485         },
1486         {
1487                 .name   = "refill_buffers",
1488                 .type   = FIO_OPT_STR_SET,
1489                 .off1   = td_var_offset(refill_buffers),
1490                 .help   = "Refill IO buffers on every IO submit",
1491         },
1492 #ifdef FIO_HAVE_DISK_UTIL
1493         {
1494                 .name   = "disk_util",
1495                 .type   = FIO_OPT_BOOL,
1496                 .off1   = td_var_offset(do_disk_util),
1497                 .help   = "Log disk utilization statistics",
1498                 .def    = "1",
1499         },
1500 #endif
1501         {
1502                 .name   = "gtod_reduce",
1503                 .type   = FIO_OPT_BOOL,
1504                 .help   = "Greatly reduce number of gettimeofday() calls",
1505                 .cb     = str_gtod_reduce_cb,
1506                 .def    = "0",
1507         },
1508         {
1509                 .name   = "disable_clat",
1510                 .type   = FIO_OPT_BOOL,
1511                 .off1   = td_var_offset(disable_clat),
1512                 .help   = "Disable completion latency numbers",
1513                 .parent = "gtod_reduce",
1514                 .def    = "0",
1515         },
1516         {
1517                 .name   = "disable_slat",
1518                 .type   = FIO_OPT_BOOL,
1519                 .off1   = td_var_offset(disable_slat),
1520                 .help   = "Disable submissionn latency numbers",
1521                 .parent = "gtod_reduce",
1522                 .def    = "0",
1523         },
1524         {
1525                 .name   = "disable_bw_measurement",
1526                 .type   = FIO_OPT_BOOL,
1527                 .off1   = td_var_offset(disable_bw),
1528                 .help   = "Disable bandwidth logging",
1529                 .parent = "gtod_reduce",
1530                 .def    = "0",
1531         },
1532         {
1533                 .name   = "gtod_cpu",
1534                 .type   = FIO_OPT_INT,
1535                 .cb     = str_gtod_cpu_cb,
1536                 .help   = "Setup dedicated gettimeofday() thread on this CPU",
1537         },
1538         {
1539                 .name   = "continue_on_error",
1540                 .type   = FIO_OPT_BOOL,
1541                 .off1   = td_var_offset(continue_on_error),
1542                 .help   = "Continue on non-fatal errors during I/O",
1543                 .def    = "0",
1544         },
1545         {
1546                 .name = NULL,
1547         },
1548 };
1549
1550 void fio_options_dup_and_init(struct option *long_options)
1551 {
1552         struct fio_option *o;
1553         unsigned int i;
1554
1555         options_init(options);
1556
1557         i = 0;
1558         while (long_options[i].name)
1559                 i++;
1560
1561         o = &options[0];
1562         while (o->name) {
1563                 long_options[i].name = (char *) o->name;
1564                 long_options[i].val = FIO_GETOPT_JOB;
1565                 if (o->type == FIO_OPT_STR_SET)
1566                         long_options[i].has_arg = no_argument;
1567                 else
1568                         long_options[i].has_arg = required_argument;
1569
1570                 i++;
1571                 o++;
1572                 assert(i < FIO_NR_OPTIONS);
1573         }
1574 }
1575
1576 int fio_options_parse(struct thread_data *td, char **opts, int num_opts)
1577 {
1578         int i, ret;
1579
1580         sort_options(opts, options, num_opts);
1581
1582         for (ret = 0, i = 0; i < num_opts; i++)
1583                 ret |= parse_option(opts[i], options, td);
1584
1585         return ret;
1586 }
1587
1588 int fio_cmd_option_parse(struct thread_data *td, const char *opt, char *val)
1589 {
1590         return parse_cmd_option(opt, val, options, td);
1591 }
1592
1593 void fio_fill_default_options(struct thread_data *td)
1594 {
1595         fill_default_options(td, options);
1596 }
1597
1598 int fio_show_option_help(const char *opt)
1599 {
1600         return show_cmd_help(options, opt);
1601 }
1602
1603 static void __options_mem(struct thread_data *td, int alloc)
1604 {
1605         struct thread_options *o = &td->o;
1606         struct fio_option *opt;
1607         char **ptr;
1608         int i;
1609
1610         for (i = 0, opt = &options[0]; opt->name; i++, opt = &options[i]) {
1611                 if (opt->type != FIO_OPT_STR_STORE)
1612                         continue;
1613
1614                 ptr = (void *) o + opt->off1;
1615                 if (*ptr) {
1616                         if (alloc)
1617                                 *ptr = strdup(*ptr);
1618                         else {
1619                                 free(*ptr);
1620                                 *ptr = NULL;
1621                         }
1622                 }
1623         }
1624 }
1625
1626 /*
1627  * dupe FIO_OPT_STR_STORE options
1628  */
1629 void options_mem_dupe(struct thread_data *td)
1630 {
1631         __options_mem(td, 1);
1632 }
1633
1634 void options_mem_free(struct thread_data fio_unused *td)
1635 {
1636 #if 0
1637         __options_mem(td, 0);
1638 #endif
1639 }