init.c

   1 /*
   2  * This file contains job initialization and setup functions.
   3  */
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <unistd.h>
   7 #include <fcntl.h>
   8 #include <ctype.h>
   9 #include <string.h>
  10 #include <errno.h>
  11 #include <getopt.h>
  12 #include <sys/ipc.h>
  13 #include <sys/shm.h>
  14 #include <sys/types.h>
  15 #include <sys/stat.h>
  16
  17 #include "fio.h"
  18 #include "parse.h"
  19
  20 static char fio_version_string[] = "fio 1.14a";
  21
  22 #define FIO_RANDSEED            (0xb1899bedUL)
  23
  24 static char **ini_file;
  25 static int max_jobs = MAX_JOBS;
  26
  27 struct thread_data def_thread;
  28 struct thread_data *threads = NULL;
  29
  30 int exitall_on_terminate = 0;
  31 int terse_output = 0;
  32 unsigned long long mlock_size = 0;
  33 FILE *f_out = NULL;
  34 FILE *f_err = NULL;
  35
  36 int write_bw_log = 0;
  37
  38 static int def_timeout = 0;
  39 static int write_lat_log = 0;
  40
  41 static int prev_group_jobs;
  42
  43 /*
  44  * Command line options. These will contain the above, plus a few
  45  * extra that only pertain to fio itself and not jobs.
  46  */
  47 static struct option long_options[FIO_NR_OPTIONS] = {
  48         {
  49                 .name           = "output",
  50                 .has_arg        = required_argument,
  51                 .val            = 'o',
  52         },
  53         {
  54                 .name           = "timeout",
  55                 .has_arg        = required_argument,
  56                 .val            = 't',
  57         },
  58         {
  59                 .name           = "latency-log",
  60                 .has_arg        = required_argument,
  61                 .val            = 'l',
  62         },
  63         {
  64                 .name           = "bandwidth-log",
  65                 .has_arg        = required_argument,
  66                 .val            = 'b',
  67         },
  68         {
  69                 .name           = "minimal",
  70                 .has_arg        = optional_argument,
  71                 .val            = 'm',
  72         },
  73         {
  74                 .name           = "version",
  75                 .has_arg        = no_argument,
  76                 .val            = 'v',
  77         },
  78         {
  79                 .name           = "help",
  80                 .has_arg        = no_argument,
  81                 .val            = 'h',
  82         },
  83         {
  84                 .name           = "cmdhelp",
  85                 .has_arg        = optional_argument,
  86                 .val            = 'c',
  87         },
  88         {
  89                 .name           = NULL,
  90         },
  91 };
  92
  93 FILE *get_f_out()
  94 {
  95         return f_out;
  96 }
  97
  98 FILE *get_f_err()
  99 {
 100         return f_err;
 101 }
 102
 103 /*
 104  * Return a free job structure.
 105  */
 106 static struct thread_data *get_new_job(int global, struct thread_data *parent)
 107 {
 108         struct thread_data *td;
 109
 110         if (global)
 111                 return &def_thread;
 112         if (thread_number >= max_jobs)
 113                 return NULL;
 114
 115         td = &threads[thread_number++];
 116         *td = *parent;
 117
 118         td->thread_number = thread_number;
 119         return td;
 120 }
 121
 122 static void put_job(struct thread_data *td)
 123 {
 124         if (td == &def_thread)
 125                 return;
 126
 127         if (td->error)
 128                 log_info("fio: %s\n", td->verror);
 129
 130         memset(&threads[td->thread_number - 1], 0, sizeof(*td));
 131         thread_number--;
 132 }
 133
 134 /*
 135  * Lazy way of fixing up options that depend on each other. We could also
 136  * define option callback handlers, but this is easier.
 137  */
 138 static int fixup_options(struct thread_data *td)
 139 {
 140         if (!td->rwmixread && td->rwmixwrite)
 141                 td->rwmixread = 100 - td->rwmixwrite;
 142
 143         if (td->write_iolog_file && td->read_iolog_file) {
 144                 log_err("fio: read iolog overrides write_iolog\n");
 145                 free(td->write_iolog_file);
 146                 td->write_iolog_file = NULL;
 147         }
 148
 149         if (td->io_ops->flags & FIO_SYNCIO)
 150                 td->iodepth = 1;
 151         else {
 152                 if (!td->iodepth)
 153                         td->iodepth = td->open_files;
 154         }
 155
 156         /*
 157          * only really works for sequential io for now, and with 1 file
 158          */
 159         if (td->zone_size && td_random(td) && td->open_files == 1)
 160                 td->zone_size = 0;
 161
 162         /*
 163          * Reads can do overwrites, we always need to pre-create the file
 164          */
 165         if (td_read(td) || td_rw(td))
 166                 td->overwrite = 1;
 167
 168         if (!td->min_bs[DDIR_READ])
 169                 td->min_bs[DDIR_READ]= td->bs[DDIR_READ];
 170         if (!td->max_bs[DDIR_READ])
 171                 td->max_bs[DDIR_READ] = td->bs[DDIR_READ];
 172         if (!td->min_bs[DDIR_WRITE])
 173                 td->min_bs[DDIR_WRITE]= td->bs[DDIR_WRITE];
 174         if (!td->max_bs[DDIR_WRITE])
 175                 td->max_bs[DDIR_WRITE] = td->bs[DDIR_WRITE];
 176
 177         td->rw_min_bs = min(td->min_bs[DDIR_READ], td->min_bs[DDIR_WRITE]);
 178
 179         if (!td->file_size_high)
 180                 td->file_size_high = td->file_size_low;
 181
 182         if (td_read(td) && !td_rw(td))
 183                 td->verify = 0;
 184
 185         if (td->norandommap && td->verify != VERIFY_NONE) {
 186                 log_err("fio: norandommap given, verify disabled\n");
 187                 td->verify = VERIFY_NONE;
 188         }
 189         if (td->bs_unaligned && (td->odirect || td->io_ops->flags & FIO_RAWIO))
 190                 log_err("fio: bs_unaligned may not work with raw io\n");
 191
 192         /*
 193          * thinktime_spin must be less than thinktime
 194          */
 195         if (td->thinktime_spin > td->thinktime)
 196                 td->thinktime_spin = td->thinktime;
 197
 198         /*
 199          * The low water mark cannot be bigger than the iodepth
 200          */
 201         if (td->iodepth_low > td->iodepth || !td->iodepth_low) {
 202                 /*
 203                  * syslet work around - if the workload is sequential,
 204                  * we want to let the queue drain all the way down to
 205                  * avoid seeking between async threads
 206                  */
 207                 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
 208                         td->iodepth_low = 1;
 209                 else
 210                         td->iodepth_low = td->iodepth;
 211         }
 212
 213         /*
 214          * If batch number isn't set, default to the same as iodepth
 215          */
 216         if (td->iodepth_batch > td->iodepth || !td->iodepth_batch)
 217                 td->iodepth_batch = td->iodepth;
 218
 219         if (td->nr_files > td->files_index)
 220                 td->nr_files = td->files_index;
 221
 222         if (td->open_files > td->nr_files || !td->open_files)
 223                 td->open_files = td->nr_files;
 224
 225         if ((td->rate && td->rate_iops) || (td->ratemin && td->rate_iops_min)) {
 226                 log_err("fio: rate and rate_iops are mutually exclusive\n");
 227                 return 1;
 228         }
 229         if ((td->rate < td->ratemin) || (td->rate_iops < td->rate_iops_min)) {
 230                 log_err("fio: minimum rate exceeds rate\n");
 231                 return 1;
 232         }
 233
 234         return 0;
 235 }
 236
 237 /*
 238  * This function leaks the buffer
 239  */
 240 static char *to_kmg(unsigned int val)
 241 {
 242         char *buf = malloc(32);
 243         char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
 244         char *p = post;
 245
 246         do {
 247                 if (val & 1023)
 248                         break;
 249
 250                 val >>= 10;
 251                 p++;
 252         } while (*p);
 253
 254         snprintf(buf, 31, "%u%c", val, *p);
 255         return buf;
 256 }
 257
 258 /* External engines are specified by "external:name.o") */
 259 static const char *get_engine_name(const char *str)
 260 {
 261         char *p = strstr(str, ":");
 262
 263         if (!p)
 264                 return str;
 265
 266         p++;
 267         strip_blank_front(&p);
 268         strip_blank_end(p);
 269         return p;
 270 }
 271
 272 static int exists_and_not_file(const char *filename)
 273 {
 274         struct stat sb;
 275
 276         if (lstat(filename, &sb) == -1)
 277                 return 0;
 278
 279         if (S_ISREG(sb.st_mode))
 280                 return 0;
 281
 282         return 1;
 283 }
 284
 285 /*
 286  * Initialize the various random states we need (random io, block size ranges,
 287  * read/write mix, etc).
 288  */
 289 static int init_random_state(struct thread_data *td)
 290 {
 291         unsigned long seeds[6];
 292         int fd, num_maps, blocks;
 293         struct fio_file *f;
 294         unsigned int i;
 295
 296         fd = open("/dev/urandom", O_RDONLY);
 297         if (fd == -1) {
 298                 td_verror(td, errno, "open");
 299                 return 1;
 300         }
 301
 302         if (read(fd, seeds, sizeof(seeds)) < (int) sizeof(seeds)) {
 303                 td_verror(td, EIO, "read");
 304                 close(fd);
 305                 return 1;
 306         }
 307
 308         close(fd);
 309
 310         os_random_seed(seeds[0], &td->bsrange_state);
 311         os_random_seed(seeds[1], &td->verify_state);
 312         os_random_seed(seeds[2], &td->rwmix_state);
 313
 314         if (td->file_service_type == FIO_FSERVICE_RANDOM)
 315                 os_random_seed(seeds[3], &td->next_file_state);
 316
 317         os_random_seed(seeds[5], &td->file_size_state);
 318
 319         if (!td_random(td))
 320                 return 0;
 321
 322         if (td->rand_repeatable)
 323                 seeds[4] = FIO_RANDSEED * td->thread_number;
 324
 325         if (!td->norandommap) {
 326                 for_each_file(td, f, i) {
 327                         blocks = (f->real_file_size + td->rw_min_bs - 1) / td->rw_min_bs;
 328                         num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
 329                         f->file_map = malloc(num_maps * sizeof(long));
 330                         if (!f->file_map) {
 331                                 log_err("fio: failed allocating random map. If running a large number of jobs, try the 'norandommap' option\n");
 332                                 return 1;
 333                         }
 334                         f->num_maps = num_maps;
 335                         memset(f->file_map, 0, num_maps * sizeof(long));
 336                 }
 337         }
 338
 339         os_random_seed(seeds[4], &td->random_state);
 340         return 0;
 341 }
 342
 343
 344 /*
 345  * Adds a job to the list of things todo. Sanitizes the various options
 346  * to make sure we don't have conflicts, and initializes various
 347  * members of td.
 348  */
 349 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
 350 {
 351         const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
 352                                    "randread", "randwrite", "randrw" };
 353         unsigned int i;
 354         struct fio_file *f;
 355         const char *engine;
 356         char fname[PATH_MAX];
 357         int numjobs, file_alloced;
 358
 359         /*
 360          * the def_thread is just for options, it's not a real job
 361          */
 362         if (td == &def_thread)
 363                 return 0;
 364
 365         engine = get_engine_name(td->ioengine);
 366         td->io_ops = load_ioengine(td, engine);
 367         if (!td->io_ops) {
 368                 log_err("fio: failed to load engine %s\n", engine);
 369                 goto err;
 370         }
 371
 372         if (td->use_thread)
 373                 nr_thread++;
 374         else
 375                 nr_process++;
 376
 377         if (td->odirect)
 378                 td->io_ops->flags |= FIO_RAWIO;
 379
 380         file_alloced = 0;
 381         if (!td->filename && !td->files_index) {
 382                 file_alloced = 1;
 383
 384                 if (td->nr_files == 1 && exists_and_not_file(jobname))
 385                         add_file(td, jobname);
 386                 else {
 387                         for (i = 0; i < td->nr_files; i++) {
 388                                 sprintf(fname, "%s.%d.%d", jobname, td->thread_number, i);
 389                                 add_file(td, fname);
 390                         }
 391                 }
 392         }
 393
 394         if (fixup_options(td))
 395                 goto err;
 396
 397         for_each_file(td, f, i) {
 398                 if (td->directory && f->filetype == FIO_TYPE_FILE) {
 399                         sprintf(fname, "%s/%s", td->directory, f->file_name);
 400                         f->file_name = strdup(fname);
 401                 }
 402         }
 403
 404         td->mutex = fio_sem_init(0);
 405
 406         td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
 407         td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
 408         td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
 409
 410         if ((td->stonewall || td->numjobs > 1) && prev_group_jobs) {
 411                 prev_group_jobs = 0;
 412                 groupid++;
 413         }
 414
 415         td->groupid = groupid;
 416         prev_group_jobs++;
 417
 418         if (init_random_state(td))
 419                 goto err;
 420
 421         if (setup_rate(td))
 422                 goto err;
 423
 424         if (td->write_lat_log) {
 425                 setup_log(&td->ts.slat_log);
 426                 setup_log(&td->ts.clat_log);
 427         }
 428         if (td->write_bw_log)
 429                 setup_log(&td->ts.bw_log);
 430
 431         if (!td->name)
 432                 td->name = strdup(jobname);
 433
 434         if (!terse_output) {
 435                 if (!job_add_num) {
 436                         if (!strcmp(td->io_ops->name, "cpuio"))
 437                                 log_info("%s: ioengine=cpu, cpuload=%u, cpucycle=%u\n", td->name, td->cpuload, td->cpucycle);
 438                         else {
 439                                 char *c1, *c2, *c3, *c4;
 440
 441                                 c1 = to_kmg(td->min_bs[DDIR_READ]);
 442                                 c2 = to_kmg(td->max_bs[DDIR_READ]);
 443                                 c3 = to_kmg(td->min_bs[DDIR_WRITE]);
 444                                 c4 = to_kmg(td->max_bs[DDIR_WRITE]);
 445
 446                                 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s, ioengine=%s, iodepth=%u\n", td->name, td->groupid, ddir_str[td->td_ddir], c1, c2, c3, c4, td->io_ops->name, td->iodepth);
 447
 448                                 free(c1);
 449                                 free(c2);
 450                                 free(c3);
 451                                 free(c4);
 452                         }
 453                 } else if (job_add_num == 1)
 454                         log_info("...\n");
 455         }
 456
 457         /*
 458          * recurse add identical jobs, clear numjobs and stonewall options
 459          * as they don't apply to sub-jobs
 460          */
 461         numjobs = td->numjobs;
 462         while (--numjobs) {
 463                 struct thread_data *td_new = get_new_job(0, td);
 464
 465                 if (!td_new)
 466                         goto err;
 467
 468                 td_new->numjobs = 1;
 469                 td_new->stonewall = 0;
 470
 471                 if (file_alloced) {
 472                         td_new->filename = NULL;
 473                         td_new->files_index = 0;
 474                         td_new->files = NULL;
 475                 }
 476
 477                 job_add_num = numjobs - 1;
 478
 479                 if (add_job(td_new, jobname, job_add_num))
 480                         goto err;
 481         }
 482
 483         if (td->numjobs > 1) {
 484                 groupid++;
 485                 prev_group_jobs = 0;
 486         }
 487
 488         return 0;
 489 err:
 490         put_job(td);
 491         return -1;
 492 }
 493
 494 static int is_empty_or_comment(char *line)
 495 {
 496         unsigned int i;
 497
 498         for (i = 0; i < strlen(line); i++) {
 499                 if (line[i] == ';')
 500                         return 1;
 501                 if (line[i] == '#')
 502                         return 1;
 503                 if (!isspace(line[i]) && !iscntrl(line[i]))
 504                         return 0;
 505         }
 506
 507         return 1;
 508 }
 509
 510 /*
 511  * This is our [ini] type file parser.
 512  */
 513 static int parse_jobs_ini(char *file, int stonewall_flag)
 514 {
 515         unsigned int global;
 516         struct thread_data *td;
 517         char *string, *name;
 518         fpos_t off;
 519         FILE *f;
 520         char *p;
 521         int ret = 0, stonewall;
 522
 523         f = fopen(file, "r");
 524         if (!f) {
 525                 perror("fopen job file");
 526                 return 1;
 527         }
 528
 529         string = malloc(4096);
 530         name = malloc(256);
 531         memset(name, 0, 256);
 532
 533         stonewall = stonewall_flag;
 534         do {
 535                 p = fgets(string, 4095, f);
 536                 if (!p)
 537                         break;
 538                 if (is_empty_or_comment(p))
 539                         continue;
 540                 if (sscanf(p, "[%255s]", name) != 1)
 541                         continue;
 542
 543                 global = !strncmp(name, "global", 6);
 544
 545                 name[strlen(name) - 1] = '\0';
 546
 547                 td = get_new_job(global, &def_thread);
 548                 if (!td) {
 549                         ret = 1;
 550                         break;
 551                 }
 552
 553                 /*
 554                  * Seperate multiple job files by a stonewall
 555                  */
 556                 if (!global && stonewall) {
 557                         td->stonewall = stonewall;
 558                         stonewall = 0;
 559                 }
 560
 561                 fgetpos(f, &off);
 562                 while ((p = fgets(string, 4096, f)) != NULL) {
 563                         if (is_empty_or_comment(p))
 564                                 continue;
 565
 566                         strip_blank_front(&p);
 567
 568                         if (p[0] == '[')
 569                                 break;
 570
 571                         strip_blank_end(p);
 572
 573                         fgetpos(f, &off);
 574
 575                         /*
 576                          * Don't break here, continue parsing options so we
 577                          * dump all the bad ones. Makes trial/error fixups
 578                          * easier on the user.
 579                          */
 580                         ret |= fio_option_parse(td, p);
 581                 }
 582
 583                 if (!ret) {
 584                         fsetpos(f, &off);
 585                         ret = add_job(td, name, 0);
 586                 } else {
 587                         log_err("fio: job %s dropped\n", name);
 588                         put_job(td);
 589                 }
 590         } while (!ret);
 591
 592         free(string);
 593         free(name);
 594         fclose(f);
 595         return ret;
 596 }
 597
 598 static int fill_def_thread(void)
 599 {
 600         memset(&def_thread, 0, sizeof(def_thread));
 601
 602         if (fio_getaffinity(getpid(), &def_thread.cpumask) == -1) {
 603                 perror("sched_getaffinity");
 604                 return 1;
 605         }
 606
 607         /*
 608          * fill default options
 609          */
 610         fio_fill_default_options(&def_thread);
 611
 612         def_thread.timeout = def_timeout;
 613         def_thread.write_bw_log = write_bw_log;
 614         def_thread.write_lat_log = write_lat_log;
 615
 616 #ifdef FIO_HAVE_DISK_UTIL
 617         def_thread.do_disk_util = 1;
 618 #endif
 619
 620         return 0;
 621 }
 622
 623 static void free_shm(void)
 624 {
 625         struct shmid_ds sbuf;
 626
 627         if (threads) {
 628                 shmdt((void *) threads);
 629                 threads = NULL;
 630                 shmctl(shm_id, IPC_RMID, &sbuf);
 631         }
 632 }
 633
 634 /*
 635  * The thread area is shared between the main process and the job
 636  * threads/processes. So setup a shared memory segment that will hold
 637  * all the job info.
 638  */
 639 static int setup_thread_area(void)
 640 {
 641         /*
 642          * 1024 is too much on some machines, scale max_jobs if
 643          * we get a failure that looks like too large a shm segment
 644          */
 645         do {
 646                 size_t size = max_jobs * sizeof(struct thread_data);
 647
 648                 shm_id = shmget(0, size, IPC_CREAT | 0600);
 649                 if (shm_id != -1)
 650                         break;
 651                 if (errno != EINVAL) {
 652                         perror("shmget");
 653                         break;
 654                 }
 655
 656                 max_jobs >>= 1;
 657         } while (max_jobs);
 658
 659         if (shm_id == -1)
 660                 return 1;
 661
 662         threads = shmat(shm_id, NULL, 0);
 663         if (threads == (void *) -1) {
 664                 perror("shmat");
 665                 return 1;
 666         }
 667
 668         atexit(free_shm);
 669         return 0;
 670 }
 671
 672 static void usage(void)
 673 {
 674         printf("%s\n", fio_version_string);
 675         printf("\t--output\tWrite output to file\n");
 676         printf("\t--timeout\tRuntime in seconds\n");
 677         printf("\t--latency-log\tGenerate per-job latency logs\n");
 678         printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
 679         printf("\t--minimal\tMinimal (terse) output\n");
 680         printf("\t--version\tPrint version info and exit\n");
 681         printf("\t--help\t\tPrint this page\n");
 682         printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of them\n");
 683 }
 684
 685 static int parse_cmd_line(int argc, char *argv[])
 686 {
 687         struct thread_data *td = NULL;
 688         int c, ini_idx = 0, lidx, ret, dont_add_job = 0;
 689
 690         while ((c = getopt_long_only(argc, argv, "", long_options, &lidx)) != -1) {
 691                 switch (c) {
 692                 case 't':
 693                         def_timeout = atoi(optarg);
 694                         break;
 695                 case 'l':
 696                         write_lat_log = 1;
 697                         break;
 698                 case 'w':
 699                         write_bw_log = 1;
 700                         break;
 701                 case 'o':
 702                         f_out = fopen(optarg, "w+");
 703                         if (!f_out) {
 704                                 perror("fopen output");
 705                                 exit(1);
 706                         }
 707                         f_err = f_out;
 708                         break;
 709                 case 'm':
 710                         terse_output = 1;
 711                         break;
 712                 case 'h':
 713                         usage();
 714                         exit(0);
 715                 case 'c':
 716                         exit(fio_show_option_help(optarg));
 717                 case 'v':
 718                         printf("%s\n", fio_version_string);
 719                         exit(0);
 720                 case FIO_GETOPT_JOB: {
 721                         const char *opt = long_options[lidx].name;
 722                         char *val = optarg;
 723
 724                         if (!strncmp(opt, "name", 4) && td) {
 725                                 ret = add_job(td, td->name ?: "fio", 0);
 726                                 if (ret) {
 727                                         put_job(td);
 728                                         return 0;
 729                                 }
 730                                 td = NULL;
 731                         }
 732                         if (!td) {
 733                                 int global = !strncmp(val, "global", 6);
 734
 735                                 td = get_new_job(global, &def_thread);
 736                                 if (!td)
 737                                         return 0;
 738                         }
 739
 740                         ret = fio_cmd_option_parse(td, opt, val);
 741                         if (ret)
 742                                 dont_add_job = 1;
 743                         break;
 744                 }
 745                 default:
 746                         break;
 747                 }
 748         }
 749
 750         if (td) {
 751                 if (dont_add_job)
 752                         put_job(td);
 753                 else {
 754                         ret = add_job(td, td->name ?: "fio", 0);
 755                         if (ret)
 756                                 put_job(td);
 757                 }
 758         }
 759
 760         while (optind < argc) {
 761                 ini_idx++;
 762                 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
 763                 ini_file[ini_idx - 1] = strdup(argv[optind]);
 764                 optind++;
 765         }
 766
 767         return ini_idx;
 768 }
 769
 770
 771 int parse_options(int argc, char *argv[])
 772 {
 773         int job_files, i;
 774
 775         f_out = stdout;
 776         f_err = stderr;
 777
 778         fio_options_dup_and_init(long_options);
 779
 780         if (setup_thread_area())
 781                 return 1;
 782         if (fill_def_thread())
 783                 return 1;
 784
 785         job_files = parse_cmd_line(argc, argv);
 786
 787         for (i = 0; i < job_files; i++) {
 788                 if (fill_def_thread())
 789                         return 1;
 790                 if (parse_jobs_ini(ini_file[i], i))
 791                         return 1;
 792                 free(ini_file[i]);
 793         }
 794
 795         free(ini_file);
 796
 797         if (!thread_number) {
 798                 log_err("No jobs defined(s)\n");
 799                 return 1;
 800         }
 801
 802         return 0;
 803 }