2 * This file contains job initialization and setup functions.
14 #include <sys/types.h>
23 static char fio_version_string[] = "fio 1.28";
25 #define FIO_RANDSEED (0xb1899bedUL)
27 static char **ini_file;
28 static int max_jobs = MAX_JOBS;
29 static int dump_cmdline;
31 static struct thread_data def_thread;
32 struct thread_data *threads = NULL;
34 int exitall_on_terminate = 0;
37 unsigned long long mlock_size = 0;
40 char *job_section = NULL;
45 static int def_timeout;
46 static int write_lat_log;
48 static int prev_group_jobs;
50 unsigned long fio_debug = 0;
51 unsigned int fio_debug_jobno = -1;
52 unsigned int *fio_debug_jobp = NULL;
55 * Command line options. These will contain the above, plus a few
56 * extra that only pertain to fio itself and not jobs.
58 static struct option l_opts[FIO_NR_OPTIONS] = {
61 .has_arg = required_argument,
66 .has_arg = required_argument,
70 .name = "latency-log",
71 .has_arg = required_argument,
75 .name = "bandwidth-log",
76 .has_arg = required_argument,
81 .has_arg = optional_argument,
86 .has_arg = no_argument,
91 .has_arg = no_argument,
96 .has_arg = optional_argument,
101 .has_arg = no_argument,
106 .has_arg = no_argument,
111 .has_arg = required_argument,
116 .has_arg = required_argument,
121 .has_arg = required_argument,
125 .name = "alloc-size",
126 .has_arg = required_argument,
145 * Return a free job structure.
147 static struct thread_data *get_new_job(int global, struct thread_data *parent)
149 struct thread_data *td;
153 if (thread_number >= max_jobs)
156 td = &threads[thread_number++];
159 dup_files(td, parent);
160 options_mem_dupe(td);
162 td->thread_number = thread_number;
166 static void put_job(struct thread_data *td)
168 if (td == &def_thread)
172 log_info("fio: %s\n", td->verror);
174 memset(&threads[td->thread_number - 1], 0, sizeof(*td));
178 static int __setup_rate(struct thread_data *td, enum fio_ddir ddir)
180 unsigned int bs = td->o.min_bs[ddir];
181 unsigned long long rate;
182 unsigned long ios_per_msec;
184 if (td->o.rate[ddir]) {
185 rate = td->o.rate[ddir];
186 ios_per_msec = (rate * 1000LL) / bs;
188 ios_per_msec = td->o.rate_iops[ddir] * 1000UL;
191 log_err("rate lower than supported\n");
195 td->rate_usec_cycle[ddir] = 1000000000ULL / ios_per_msec;
196 td->rate_pending_usleep[ddir] = 0;
200 static int setup_rate(struct thread_data *td)
204 if (td->o.rate[DDIR_READ] || td->o.rate_iops[DDIR_READ])
205 ret = __setup_rate(td, DDIR_READ);
206 if (td->o.rate[DDIR_WRITE] || td->o.rate_iops[DDIR_WRITE])
207 ret |= __setup_rate(td, DDIR_WRITE);
212 static int fixed_block_size(struct thread_options *o)
214 return o->min_bs[DDIR_READ] == o->max_bs[DDIR_READ] &&
215 o->min_bs[DDIR_WRITE] == o->max_bs[DDIR_WRITE] &&
216 o->min_bs[DDIR_READ] == o->min_bs[DDIR_WRITE];
220 * Lazy way of fixing up options that depend on each other. We could also
221 * define option callback handlers, but this is easier.
223 static int fixup_options(struct thread_data *td)
225 struct thread_options *o = &td->o;
227 #ifndef FIO_HAVE_PSHARED_MUTEX
228 if (!td->o.use_thread) {
229 log_info("fio: this platform does not support process shared"
230 " mutexes, forcing use of threads. Use the 'thread'"
231 " option to get rid of this warning.\n");
232 td->o.use_thread = 1;
236 #ifndef FIO_HAVE_CPU_AFFINITY
237 if (td->o.gtod_cpu) {
238 log_err("fio: platform must support CPU affinity for"
239 "gettimeofday() offloading\n");
244 if (read_only && td_write(td)) {
245 log_err("fio: job <%s> has write bit set, but fio is in"
246 " read-only mode\n", td->o.name);
250 if (o->write_iolog_file && o->read_iolog_file) {
251 log_err("fio: read iolog overrides write_iolog\n");
252 free(o->write_iolog_file);
253 o->write_iolog_file = NULL;
257 * only really works for sequential io for now, and with 1 file
259 if (o->zone_size && td_random(td) && o->open_files == 1)
263 * Reads can do overwrites, we always need to pre-create the file
265 if (td_read(td) || td_rw(td))
268 if (!o->min_bs[DDIR_READ])
269 o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
270 if (!o->max_bs[DDIR_READ])
271 o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
272 if (!o->min_bs[DDIR_WRITE])
273 o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
274 if (!o->max_bs[DDIR_WRITE])
275 o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
277 o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
280 * For random IO, allow blockalign offset other than min_bs.
282 if (!o->ba[DDIR_READ] || !td_random(td))
283 o->ba[DDIR_READ] = o->min_bs[DDIR_READ];
284 if (!o->ba[DDIR_WRITE] || !td_random(td))
285 o->ba[DDIR_WRITE] = o->min_bs[DDIR_WRITE];
287 if ((o->ba[DDIR_READ] != o->min_bs[DDIR_READ] ||
288 o->ba[DDIR_WRITE] != o->min_bs[DDIR_WRITE]) &&
289 !td->o.norandommap) {
290 log_err("fio: Any use of blockalign= turns off randommap\n");
291 td->o.norandommap = 1;
294 if (!o->file_size_high)
295 o->file_size_high = o->file_size_low;
297 if (o->norandommap && o->verify != VERIFY_NONE
298 && !fixed_block_size(o)) {
299 log_err("fio: norandommap given for variable block sizes, "
300 "verify disabled\n");
301 o->verify = VERIFY_NONE;
303 if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
304 log_err("fio: bs_unaligned may not work with raw io\n");
307 * thinktime_spin must be less than thinktime
309 if (o->thinktime_spin > o->thinktime)
310 o->thinktime_spin = o->thinktime;
313 * The low water mark cannot be bigger than the iodepth
315 if (o->iodepth_low > o->iodepth || !o->iodepth_low) {
317 * syslet work around - if the workload is sequential,
318 * we want to let the queue drain all the way down to
319 * avoid seeking between async threads
321 if (!strcmp(td->io_ops->name, "syslet-rw") && !td_random(td))
324 o->iodepth_low = o->iodepth;
328 * If batch number isn't set, default to the same as iodepth
330 if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
331 o->iodepth_batch = o->iodepth;
333 if (o->nr_files > td->files_index)
334 o->nr_files = td->files_index;
336 if (o->open_files > o->nr_files || !o->open_files)
337 o->open_files = o->nr_files;
339 if (((o->rate[0] + o->rate[1]) && (o->rate_iops[0] + o->rate_iops[1]))||
340 ((o->ratemin[0] + o->ratemin[1]) && (o->rate_iops_min[0] +
341 o->rate_iops_min[1]))) {
342 log_err("fio: rate and rate_iops are mutually exclusive\n");
345 if ((o->rate[0] < o->ratemin[0]) || (o->rate[1] < o->ratemin[1]) ||
346 (o->rate_iops[0] < o->rate_iops_min[0]) ||
347 (o->rate_iops[1] < o->rate_iops_min[1])) {
348 log_err("fio: minimum rate exceeds rate\n");
352 if (!o->timeout && o->time_based) {
353 log_err("fio: time_based requires a runtime/timeout setting\n");
357 if (o->fill_device && !o->size)
360 if (td_rw(td) && td->o.verify != VERIFY_NONE)
361 log_info("fio: mixed read/write workload with verify. May not "
362 "work as expected, unless you pre-populated the file\n");
364 if (td->o.verify != VERIFY_NONE)
365 td->o.refill_buffers = 1;
368 td->o.invalidate_cache = 0;
374 * This function leaks the buffer
376 static char *to_kmg(unsigned int val)
378 char *buf = malloc(32);
379 char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
390 snprintf(buf, 31, "%u%c", val, *p);
394 /* External engines are specified by "external:name.o") */
395 static const char *get_engine_name(const char *str)
397 char *p = strstr(str, ":");
403 strip_blank_front(&p);
408 static int exists_and_not_file(const char *filename)
412 if (lstat(filename, &sb) == -1)
415 if (S_ISREG(sb.st_mode))
421 void td_fill_rand_seeds(struct thread_data *td)
423 os_random_seed(td->rand_seeds[0], &td->bsrange_state);
424 os_random_seed(td->rand_seeds[1], &td->verify_state);
425 os_random_seed(td->rand_seeds[2], &td->rwmix_state);
427 if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
428 os_random_seed(td->rand_seeds[3], &td->next_file_state);
430 os_random_seed(td->rand_seeds[5], &td->file_size_state);
435 if (td->o.rand_repeatable)
436 td->rand_seeds[4] = FIO_RANDSEED * td->thread_number;
438 os_random_seed(td->rand_seeds[4], &td->random_state);
442 * Initialize the various random states we need (random io, block size ranges,
443 * read/write mix, etc).
445 static int init_random_state(struct thread_data *td)
449 fd = open("/dev/urandom", O_RDONLY);
451 td_verror(td, errno, "open");
455 if (read(fd, td->rand_seeds, sizeof(td->rand_seeds)) <
456 (int) sizeof(td->rand_seeds)) {
457 td_verror(td, EIO, "read");
463 td_fill_rand_seeds(td);
468 * Adds a job to the list of things todo. Sanitizes the various options
469 * to make sure we don't have conflicts, and initializes various
472 static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
474 const char *ddir_str[] = { NULL, "read", "write", "rw", NULL,
475 "randread", "randwrite", "randrw" };
478 char fname[PATH_MAX];
479 int numjobs, file_alloced;
482 * the def_thread is just for options, it's not a real job
484 if (td == &def_thread)
488 * if we are just dumping the output command line, don't add the job
495 engine = get_engine_name(td->o.ioengine);
496 td->io_ops = load_ioengine(td, engine);
498 log_err("fio: failed to load engine %s\n", engine);
502 if (td->o.use_thread)
508 td->io_ops->flags |= FIO_RAWIO;
511 if (!td->o.filename && !td->files_index && !td->o.read_iolog_file) {
514 if (td->o.nr_files == 1 && exists_and_not_file(jobname))
515 add_file(td, jobname);
517 for (i = 0; i < td->o.nr_files; i++) {
518 sprintf(fname, "%s.%d.%d", jobname,
519 td->thread_number, i);
525 if (fixup_options(td))
528 if (td->io_ops->flags & FIO_DISKLESSIO) {
531 for_each_file(td, f, i)
532 f->real_file_size = -1ULL;
535 td->mutex = fio_mutex_init(0);
537 td->ts.clat_stat[0].min_val = td->ts.clat_stat[1].min_val = ULONG_MAX;
538 td->ts.slat_stat[0].min_val = td->ts.slat_stat[1].min_val = ULONG_MAX;
539 td->ts.bw_stat[0].min_val = td->ts.bw_stat[1].min_val = ULONG_MAX;
540 td->ddir_nr = td->o.ddir_nr;
542 if ((td->o.stonewall || td->o.numjobs > 1 || td->o.new_group)
543 && prev_group_jobs) {
548 td->groupid = groupid;
551 if (init_random_state(td))
557 if (td->o.write_lat_log) {
558 setup_log(&td->ts.slat_log);
559 setup_log(&td->ts.clat_log);
561 if (td->o.write_bw_log)
562 setup_log(&td->ts.bw_log);
565 td->o.name = strdup(jobname);
569 if (!strcmp(td->io_ops->name, "cpuio")) {
570 log_info("%s: ioengine=cpu, cpuload=%u,"
571 " cpucycle=%u\n", td->o.name,
575 char *c1, *c2, *c3, *c4;
577 c1 = to_kmg(td->o.min_bs[DDIR_READ]);
578 c2 = to_kmg(td->o.max_bs[DDIR_READ]);
579 c3 = to_kmg(td->o.min_bs[DDIR_WRITE]);
580 c4 = to_kmg(td->o.max_bs[DDIR_WRITE]);
582 log_info("%s: (g=%d): rw=%s, bs=%s-%s/%s-%s,"
583 " ioengine=%s, iodepth=%u\n",
584 td->o.name, td->groupid,
585 ddir_str[td->o.td_ddir],
595 } else if (job_add_num == 1)
600 * recurse add identical jobs, clear numjobs and stonewall options
601 * as they don't apply to sub-jobs
603 numjobs = td->o.numjobs;
605 struct thread_data *td_new = get_new_job(0, td);
610 td_new->o.numjobs = 1;
611 td_new->o.stonewall = 0;
612 td_new->o.new_group = 0;
615 td_new->o.filename = NULL;
616 td_new->files_index = 0;
617 td_new->files_size = 0;
618 td_new->files = NULL;
621 job_add_num = numjobs - 1;
623 if (add_job(td_new, jobname, job_add_num))
633 static int skip_this_section(const char *name)
637 if (!strncmp(name, "global", 6))
640 return strcmp(job_section, name);
643 static int is_empty_or_comment(char *line)
647 for (i = 0; i < strlen(line); i++) {
652 if (!isspace(line[i]) && !iscntrl(line[i]))
660 * This is our [ini] type file parser.
662 static int parse_jobs_ini(char *file, int stonewall_flag)
665 struct thread_data *td;
669 int ret = 0, stonewall;
674 int i, alloc_opts, num_opts;
676 if (!strcmp(file, "-"))
679 f = fopen(file, "r");
682 perror("fopen job file");
686 string = malloc(4096);
689 * it's really 256 + small bit, 280 should suffice
692 memset(name, 0, 280);
695 opts = malloc(sizeof(char *) * alloc_opts);
698 stonewall = stonewall_flag;
701 * if skip_fgets is set, we already have loaded a line we
705 p = fgets(string, 4095, f);
711 strip_blank_front(&p);
714 if (is_empty_or_comment(p))
716 if (sscanf(p, "[%255s]", name) != 1) {
719 log_err("fio: option <%s> outside of [] job section\n",
724 if (skip_this_section(name)) {
730 global = !strncmp(name, "global", 6);
732 name[strlen(name) - 1] = '\0';
738 log_info("--name=%s ", name);
742 td = get_new_job(global, &def_thread);
749 * Seperate multiple job files by a stonewall
751 if (!global && stonewall) {
752 td->o.stonewall = stonewall;
757 memset(opts, 0, alloc_opts * sizeof(char *));
759 while ((p = fgets(string, 4096, f)) != NULL) {
760 if (is_empty_or_comment(p))
763 strip_blank_front(&p);
766 * new section, break out and make sure we don't
767 * fgets() a new line at the top.
776 if (num_opts == alloc_opts) {
779 alloc_opts * sizeof(char *));
782 opts[num_opts] = strdup(p);
786 ret = fio_options_parse(td, opts, num_opts);
789 for (i = 0; i < num_opts; i++)
790 log_info("--%s ", opts[i]);
792 ret = add_job(td, name, 0);
794 log_err("fio: job %s dropped\n", name);
798 for (i = 0; i < num_opts; i++)
806 for (i = 0; i < num_opts; i++)
817 static int fill_def_thread(void)
819 memset(&def_thread, 0, sizeof(def_thread));
821 fio_getaffinity(getpid(), &def_thread.o.cpumask);
824 * fill default options
826 fio_fill_default_options(&def_thread);
828 def_thread.o.timeout = def_timeout;
829 def_thread.o.write_bw_log = write_bw_log;
830 def_thread.o.write_lat_log = write_lat_log;
835 static void free_shm(void)
837 struct shmid_ds sbuf;
844 fio_debug_jobp = NULL;
846 shmctl(shm_id, IPC_RMID, &sbuf);
853 * The thread area is shared between the main process and the job
854 * threads/processes. So setup a shared memory segment that will hold
855 * all the job info. We use the end of the region for keeping track of
856 * open files across jobs, for file sharing.
858 static int setup_thread_area(void)
863 * 1024 is too much on some machines, scale max_jobs if
864 * we get a failure that looks like too large a shm segment
867 size_t size = max_jobs * sizeof(struct thread_data);
869 size += file_hash_size;
870 size += sizeof(unsigned int);
872 shm_id = shmget(0, size, IPC_CREAT | 0600);
875 if (errno != EINVAL) {
886 threads = shmat(shm_id, NULL, 0);
887 if (threads == (void *) -1) {
892 memset(threads, 0, max_jobs * sizeof(struct thread_data));
893 hash = (void *) threads + max_jobs * sizeof(struct thread_data);
894 fio_debug_jobp = (void *) hash + file_hash_size;
895 *fio_debug_jobp = -1;
896 file_hash_init(hash);
901 static void usage(const char *name)
903 printf("%s\n", fio_version_string);
904 printf("%s [options] [job options] <job file(s)>\n", name);
905 printf("\t--debug=options\tEnable debug logging\n");
906 printf("\t--output\tWrite output to file\n");
907 printf("\t--timeout\tRuntime in seconds\n");
908 printf("\t--latency-log\tGenerate per-job latency logs\n");
909 printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
910 printf("\t--minimal\tMinimal (terse) output\n");
911 printf("\t--version\tPrint version info and exit\n");
912 printf("\t--help\t\tPrint this page\n");
913 printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of"
915 printf("\t--showcmd\tTurn a job file into command line options\n");
916 printf("\t--eta=when\tWhen ETA estimate should be printed\n");
917 printf("\t \tMay be \"always\", \"never\" or \"auto\"\n");
918 printf("\t--readonly\tTurn on safety read-only checks, preventing"
920 printf("\t--section=name\tOnly run specified section in job file\n");
921 printf("\t--alloc-size=kb\tSet smalloc pool to this size in kb"
923 printf("\nFio was written by Jens Axboe <jens.axboe@oracle.com>\n");
927 struct debug_level debug_levels[] = {
928 { .name = "process", .shift = FD_PROCESS, },
929 { .name = "file", .shift = FD_FILE, },
930 { .name = "io", .shift = FD_IO, },
931 { .name = "mem", .shift = FD_MEM, },
932 { .name = "blktrace", .shift = FD_BLKTRACE },
933 { .name = "verify", .shift = FD_VERIFY },
934 { .name = "random", .shift = FD_RANDOM },
935 { .name = "parse", .shift = FD_PARSE },
936 { .name = "diskutil", .shift = FD_DISKUTIL },
937 { .name = "job", .shift = FD_JOB },
938 { .name = "mutex", .shift = FD_MUTEX },
942 static int set_debug(const char *string)
944 struct debug_level *dl;
945 char *p = (char *) string;
949 if (!strcmp(string, "?") || !strcmp(string, "help")) {
952 log_info("fio: dumping debug options:");
953 for (i = 0; debug_levels[i].name; i++) {
954 dl = &debug_levels[i];
955 log_info("%s,", dl->name);
961 while ((opt = strsep(&p, ",")) != NULL) {
964 if (!strncmp(opt, "all", 3)) {
965 log_info("fio: set all debug options\n");
970 for (i = 0; debug_levels[i].name; i++) {
971 dl = &debug_levels[i];
972 found = !strncmp(opt, dl->name, strlen(dl->name));
976 if (dl->shift == FD_JOB) {
977 opt = strchr(opt, ':');
979 log_err("fio: missing job number\n");
983 fio_debug_jobno = atoi(opt);
984 log_info("fio: set debug jobno %d\n",
987 log_info("fio: set debug option %s\n", opt);
988 fio_debug |= (1UL << dl->shift);
994 log_err("fio: debug mask %s not found\n", opt);
999 static int set_debug(const char *string)
1001 log_err("fio: debug tracing not included in build\n");
1006 static int parse_cmd_line(int argc, char *argv[])
1008 struct thread_data *td = NULL;
1009 int c, ini_idx = 0, lidx, ret = 0, do_exit = 0, exit_val = 0;
1011 while ((c = getopt_long_only(argc, argv, "", l_opts, &lidx)) != -1) {
1014 smalloc_pool_size = atoi(optarg);
1017 def_timeout = atoi(optarg);
1026 f_out = fopen(optarg, "w+");
1028 perror("fopen output");
1040 exit(fio_show_option_help(optarg));
1048 printf("%s\n", fio_version_string);
1051 if (!strcmp("always", optarg))
1052 eta_print = FIO_ETA_ALWAYS;
1053 else if (!strcmp("never", optarg))
1054 eta_print = FIO_ETA_NEVER;
1057 if (set_debug(optarg))
1061 if (!strcmp(optarg, "global")) {
1062 log_err("fio: can't use global as only "
1070 job_section = strdup(optarg);
1072 case FIO_GETOPT_JOB: {
1073 const char *opt = l_opts[lidx].name;
1076 if (!strncmp(opt, "name", 4) && td) {
1077 ret = add_job(td, td->o.name ?: "fio", 0);
1085 int is_section = !strncmp(opt, "name", 4);
1088 if (!is_section || !strncmp(val, "global", 6))
1091 if (is_section && skip_this_section(val))
1094 td = get_new_job(global, &def_thread);
1099 ret = fio_cmd_option_parse(td, opt, val);
1114 ret = add_job(td, td->o.name ?: "fio", 0);
1119 while (optind < argc) {
1121 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1122 ini_file[ini_idx - 1] = strdup(argv[optind]);
1129 int parse_options(int argc, char *argv[])
1136 fio_options_dup_and_init(l_opts);
1138 if (setup_thread_area())
1140 if (fill_def_thread())
1143 job_files = parse_cmd_line(argc, argv);
1145 for (i = 0; i < job_files; i++) {
1146 if (fill_def_thread())
1148 if (parse_jobs_ini(ini_file[i], i))
1154 options_mem_free(&def_thread);
1156 if (!thread_number) {
1160 log_err("No jobs defined(s)\n\n");
1165 if (def_thread.o.gtod_offload) {
1167 fio_gtod_offload = 1;
1168 fio_gtod_cpu = def_thread.o.gtod_cpu;