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[PATCH] Reversed order of thinktime_blocks modulo operation
[fio.git] / init.c
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CommitLineData
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 <assert.h>
13#include <sys/ipc.h>
14#include <sys/shm.h>
15#include <sys/types.h>
16#include <sys/stat.h>
17
18#include "fio.h"
19#include "parse.h"
20
21#define FIO_RANDSEED (0xb1899bedUL)
22
23#define td_var_offset(var) ((size_t) &((struct thread_data *)0)->var)
24
25static int str_rw_cb(void *, const char *);
26static int str_ioengine_cb(void *, const char *);
27static int str_mem_cb(void *, const char *);
28static int str_verify_cb(void *, const char *);
29static int str_lockmem_cb(void *, unsigned long *);
30#ifdef FIO_HAVE_IOPRIO
31static int str_prio_cb(void *, unsigned int *);
32static int str_prioclass_cb(void *, unsigned int *);
33#endif
34static int str_exitall_cb(void);
35static int str_cpumask_cb(void *, unsigned int *);
36
37#define __stringify_1(x) #x
38#define __stringify(x) __stringify_1(x)
39
40/*
41 * Map of job/command line options
42 */
43static struct fio_option options[] = {
44 {
45 .name = "name",
46 .type = FIO_OPT_STR_STORE,
47 .off1 = td_var_offset(name),
48 .help = "Name of this job",
49 },
50 {
51 .name = "directory",
52 .type = FIO_OPT_STR_STORE,
53 .off1 = td_var_offset(directory),
54 .help = "Directory to store files in",
55 },
56 {
57 .name = "filename",
58 .type = FIO_OPT_STR_STORE,
59 .off1 = td_var_offset(filename),
60 .help = "Force the use of a specific file",
61 },
62 {
63 .name = "rw",
64 .type = FIO_OPT_STR,
65 .cb = str_rw_cb,
66 .help = "IO direction (read, write, rw, etc)",
67 .def = "read",
68 },
69 {
70 .name = "ioengine",
71 .type = FIO_OPT_STR,
72 .cb = str_ioengine_cb,
73 .help = "IO engine to use (sync, aio, etc)",
74 .def = "sync",
75 },
76 {
77 .name = "mem",
78 .type = FIO_OPT_STR,
79 .cb = str_mem_cb,
80 .help = "Backing type for IO buffers (malloc, shm, etc)",
81 .def = "malloc",
82 },
83 {
84 .name = "verify",
85 .type = FIO_OPT_STR,
86 .cb = str_verify_cb,
87 .help = "Verify sum function (md5 or crc32)",
88 .def = "0",
89 },
90 {
91 .name = "write_iolog",
92 .type = FIO_OPT_STR_STORE,
93 .off1 = td_var_offset(write_iolog_file),
94 .help = "Store IO pattern to file",
95 },
96 {
97 .name = "read_iolog",
98 .type = FIO_OPT_STR_STORE,
99 .off1 = td_var_offset(read_iolog_file),
100 .help = "Playback IO pattern from file",
101 },
102 {
103 .name = "exec_prerun",
104 .type = FIO_OPT_STR_STORE,
105 .off1 = td_var_offset(exec_prerun),
106 .help = "Execute this file prior to running job",
107 },
108 {
109 .name = "exec_postrun",
110 .type = FIO_OPT_STR_STORE,
111 .off1 = td_var_offset(exec_postrun),
112 .help = "Execute this file after running job",
113 },
114#ifdef FIO_HAVE_IOSCHED_SWITCH
115 {
116 .name = "ioscheduler",
117 .type = FIO_OPT_STR_STORE,
118 .off1 = td_var_offset(ioscheduler),
119 .help = "Use this IO scheduler on the backing device",
120 },
121#endif
122 {
123 .name = "size",
124 .type = FIO_OPT_STR_VAL,
125 .off1 = td_var_offset(total_file_size),
126 .help = "Size of device or file",
127 },
128 {
129 .name = "bs",
130 .type = FIO_OPT_STR_VAL_INT,
131 .off1 = td_var_offset(bs[DDIR_READ]),
132 .off2 = td_var_offset(bs[DDIR_WRITE]),
133 .help = "Block size unit",
134 .def = "4k",
135 },
136 {
137 .name = "offset",
138 .type = FIO_OPT_STR_VAL,
139 .off1 = td_var_offset(start_offset),
140 .help = "Start IO from this offset",
141 .def = "0",
142 },
143 {
144 .name = "zonesize",
145 .type = FIO_OPT_STR_VAL,
146 .off1 = td_var_offset(zone_size),
147 .help = "Give size of an IO zone",
148 .def = "0",
149 },
150 {
151 .name = "zoneskip",
152 .type = FIO_OPT_STR_VAL,
153 .off1 = td_var_offset(zone_skip),
154 .help = "Space between IO zones",
155 .def = "0",
156 },
157 {
158 .name = "lockmem",
159 .type = FIO_OPT_STR_VAL,
160 .cb = str_lockmem_cb,
161 .help = "Lock down this amount of memory",
162 .def = "0",
163 },
164 {
165 .name = "bsrange",
166 .type = FIO_OPT_RANGE,
167 .off1 = td_var_offset(min_bs[DDIR_READ]),
168 .off2 = td_var_offset(max_bs[DDIR_READ]),
169 .off3 = td_var_offset(min_bs[DDIR_WRITE]),
170 .off4 = td_var_offset(max_bs[DDIR_WRITE]),
171 .help = "Set block size range",
172 },
173 {
174 .name = "randrepeat",
175 .type = FIO_OPT_INT,
176 .off1 = td_var_offset(rand_repeatable),
177 .help = "Use repeatable random IO pattern",
178 .def = "1",
179 },
180 {
181 .name = "nrfiles",
182 .type = FIO_OPT_INT,
183 .off1 = td_var_offset(nr_files),
184 .help = "Split job workload between this number of files",
185 .def = "1",
186 },
187 {
188 .name = "iodepth",
189 .type = FIO_OPT_INT,
190 .off1 = td_var_offset(iodepth),
191 .help = "Amount of IO buffers to keep in flight",
192 .def = "1",
193 },
194 {
195 .name = "fsync",
196 .type = FIO_OPT_INT,
197 .off1 = td_var_offset(fsync_blocks),
198 .help = "Issue fsync for writes every given number of blocks",
199 .def = "0",
200 },
201 {
202 .name = "rwmixcycle",
203 .type = FIO_OPT_INT,
204 .off1 = td_var_offset(rwmixcycle),
205 .help = "Cycle period for mixed read/write workloads (msec)",
206 .def = "500",
207 },
208 {
209 .name = "rwmixread",
210 .type = FIO_OPT_INT,
211 .off1 = td_var_offset(rwmixread),
212 .maxval = 100,
213 .help = "Percentage of mixed workload that is reads",
214 .def = "50",
215 },
216 {
217 .name = "rwmixwrite",
218 .type = FIO_OPT_INT,
219 .off1 = td_var_offset(rwmixwrite),
220 .maxval = 100,
221 .help = "Percentage of mixed workload that is writes",
222 .def = "50",
223 },
224 {
225 .name = "nice",
226 .type = FIO_OPT_INT,
227 .off1 = td_var_offset(nice),
228 .help = "Set job CPU nice value",
229 .maxval = 20,
230 .def = "0",
231 },
232#ifdef FIO_HAVE_IOPRIO
233 {
234 .name = "prio",
235 .type = FIO_OPT_INT,
236 .cb = str_prio_cb,
237 .help = "Set job IO priority value",
238 },
239 {
240 .name = "prioclass",
241 .type = FIO_OPT_INT,
242 .cb = str_prioclass_cb,
243 .help = "Set job IO priority class",
244 },
245#endif
246 {
247 .name = "thinktime",
248 .type = FIO_OPT_INT,
249 .off1 = td_var_offset(thinktime),
250 .help = "Idle time between IO buffers",
251 .def = "0",
252 },
253 {
254 .name = "thinktime_blocks",
255 .type = FIO_OPT_INT,
256 .off1 = td_var_offset(thinktime_blocks),
257 .help = "IO buffer period between 'thinktime'",
258 .def = "1",
259 },
260 {
261 .name = "rate",
262 .type = FIO_OPT_INT,
263 .off1 = td_var_offset(rate),
264 .help = "Set bandwidth rate",
265 },
266 {
267 .name = "ratemin",
268 .type = FIO_OPT_INT,
269 .off1 = td_var_offset(ratemin),
270 .help = "The bottom limit accepted",
271 },
272 {
273 .name = "ratecycle",
274 .type = FIO_OPT_INT,
275 .off1 = td_var_offset(ratecycle),
276 .help = "Window average for rate limits (msec)",
277 .def = "1000",
278 },
279 {
280 .name = "startdelay",
281 .type = FIO_OPT_INT,
282 .off1 = td_var_offset(start_delay),
283 .help = "Only start job when this period has passed",
284 .def = "0",
285 },
286 {
287 .name = "timeout",
288 .type = FIO_OPT_STR_VAL_TIME,
289 .off1 = td_var_offset(timeout),
290 .help = "Stop workload when this amount of time has passed",
291 .def = "0",
292 },
293 {
294 .name = "invalidate",
295 .type = FIO_OPT_INT,
296 .off1 = td_var_offset(invalidate_cache),
297 .help = "Invalidate buffer/page cache prior to running job",
298 .def = "1",
299 },
300 {
301 .name = "sync",
302 .type = FIO_OPT_INT,
303 .off1 = td_var_offset(sync_io),
304 .help = "Use O_SYNC for buffered writes",
305 .def = "0",
306 },
307 {
308 .name = "bwavgtime",
309 .type = FIO_OPT_INT,
310 .off1 = td_var_offset(bw_avg_time),
311 .help = "Time window over which to calculate bandwidth (msec)",
312 .def = "500",
313 },
314 {
315 .name = "create_serialize",
316 .type = FIO_OPT_INT,
317 .off1 = td_var_offset(create_serialize),
318 .help = "Serialize creating of job files",
319 .def = "1",
320 },
321 {
322 .name = "create_fsync",
323 .type = FIO_OPT_INT,
324 .off1 = td_var_offset(create_fsync),
325 .help = "Fsync file after creation",
326 .def = "1",
327 },
328 {
329 .name = "loops",
330 .type = FIO_OPT_INT,
331 .off1 = td_var_offset(loops),
332 .help = "Number of times to run the job",
333 .def = "1",
334 },
335 {
336 .name = "numjobs",
337 .type = FIO_OPT_INT,
338 .off1 = td_var_offset(numjobs),
339 .help = "Duplicate this job this many times",
340 .def = "1",
341 },
342 {
343 .name = "cpuload",
344 .type = FIO_OPT_INT,
345 .off1 = td_var_offset(cpuload),
346 .help = "Use this percentage of CPU",
347 },
348 {
349 .name = "cpuchunks",
350 .type = FIO_OPT_INT,
351 .off1 = td_var_offset(cpucycle),
352 .help = "Length of the CPU burn cycles",
353 },
354 {
355 .name = "direct",
356 .type = FIO_OPT_INT,
357 .off1 = td_var_offset(odirect),
358 .help = "Use O_DIRECT IO",
359 .def = "1",
360 },
361 {
362 .name = "overwrite",
363 .type = FIO_OPT_INT,
364 .off1 = td_var_offset(overwrite),
365 .help = "When writing, set whether to overwrite current data",
366 .def = "0",
367 },
368#ifdef FIO_HAVE_CPU_AFFINITY
369 {
370 .name = "cpumask",
371 .type = FIO_OPT_INT,
372 .cb = str_cpumask_cb,
373 .help = "CPU affinity mask",
374 },
375#endif
376 {
377 .name = "end_fsync",
378 .type = FIO_OPT_INT,
379 .off1 = td_var_offset(end_fsync),
380 .help = "Include fsync at the end of job",
381 .def = "0",
382 },
383 {
384 .name = "unlink",
385 .type = FIO_OPT_INT,
386 .off1 = td_var_offset(unlink),
387 .help = "Unlink created files after job has completed",
388 .def = "1",
389 },
390 {
391 .name = "exitall",
392 .type = FIO_OPT_STR_SET,
393 .cb = str_exitall_cb,
394 .help = "Terminate all jobs when one exits",
395 },
396 {
397 .name = "stonewall",
398 .type = FIO_OPT_STR_SET,
399 .off1 = td_var_offset(stonewall),
400 .help = "Insert a hard barrier between this job and previous",
401 },
402 {
403 .name = "thread",
404 .type = FIO_OPT_STR_SET,
405 .off1 = td_var_offset(thread),
406 .help = "Use threads instead of forks",
407 },
408 {
409 .name = "write_bw_log",
410 .type = FIO_OPT_STR_SET,
411 .off1 = td_var_offset(write_bw_log),
412 .help = "Write log of bandwidth during run",
413 },
414 {
415 .name = "write_lat_log",
416 .type = FIO_OPT_STR_SET,
417 .off1 = td_var_offset(write_lat_log),
418 .help = "Write log of latency during run",
419 },
420 {
421 .name = "norandommap",
422 .type = FIO_OPT_STR_SET,
423 .off1 = td_var_offset(norandommap),
424 .help = "Accept potential duplicate random blocks",
425 },
426 {
427 .name = "bs_unaligned",
428 .type = FIO_OPT_STR_SET,
429 .off1 = td_var_offset(bs_unaligned),
430 .help = "Don't sector align IO buffer sizes",
431 },
432 {
433 .name = "hugepage-size",
434 .type = FIO_OPT_STR_VAL,
435 .off1 = td_var_offset(hugepage_size),
436 .help = "When using hugepages, specify size of each page",
437 .def = __stringify(FIO_HUGE_PAGE),
438 },
439 {
440 .name = NULL,
441 },
442};
443
444#define FIO_JOB_OPTS (sizeof(options) / sizeof(struct fio_option))
445#define FIO_CMD_OPTS (16)
446#define FIO_GETOPT_JOB (0x89988998)
447
448/*
449 * Command line options. These will contain the above, plus a few
450 * extra that only pertain to fio itself and not jobs.
451 */
452static struct option long_options[FIO_JOB_OPTS + FIO_CMD_OPTS] = {
453 {
454 .name = "output",
455 .has_arg = required_argument,
456 .val = 'o',
457 },
458 {
459 .name = "timeout",
460 .has_arg = required_argument,
461 .val = 't',
462 },
463 {
464 .name = "latency-log",
465 .has_arg = required_argument,
466 .val = 'l',
467 },
468 {
469 .name = "bandwidth-log",
470 .has_arg = required_argument,
471 .val = 'b',
472 },
473 {
474 .name = "minimal",
475 .has_arg = optional_argument,
476 .val = 'm',
477 },
478 {
479 .name = "version",
480 .has_arg = no_argument,
481 .val = 'v',
482 },
483 {
484 .name = "help",
485 .has_arg = no_argument,
486 .val = 'h',
487 },
488 {
489 .name = "cmdhelp",
490 .has_arg = required_argument,
491 .val = 'c',
492 },
493 {
494 .name = NULL,
495 },
496};
497
498static int def_timeout = 0;
499
500static char fio_version_string[] = "fio 1.11";
501
502static char **ini_file;
503static int max_jobs = MAX_JOBS;
504
505struct thread_data def_thread;
506struct thread_data *threads = NULL;
507
508int exitall_on_terminate = 0;
509int terse_output = 0;
510unsigned long long mlock_size = 0;
511FILE *f_out = NULL;
512FILE *f_err = NULL;
513
514static int write_lat_log = 0;
515static int write_bw_log = 0;
516
517/*
518 * Return a free job structure.
519 */
520static struct thread_data *get_new_job(int global, struct thread_data *parent)
521{
522 struct thread_data *td;
523
524 if (global)
525 return &def_thread;
526 if (thread_number >= max_jobs)
527 return NULL;
528
529 td = &threads[thread_number++];
530 *td = *parent;
531
532 td->thread_number = thread_number;
533 return td;
534}
535
536static void put_job(struct thread_data *td)
537{
538 if (td == &def_thread)
539 return;
540
541 memset(&threads[td->thread_number - 1], 0, sizeof(*td));
542 thread_number--;
543}
544
545/*
546 * Lazy way of fixing up options that depend on each other. We could also
547 * define option callback handlers, but this is easier.
548 */
549static void fixup_options(struct thread_data *td)
550{
551 if (!td->rwmixread && td->rwmixwrite)
552 td->rwmixread = 100 - td->rwmixwrite;
553
554 if (td->write_iolog_file && td->read_iolog_file) {
555 log_err("fio: read iolog overrides write_iolog\n");
556 free(td->write_iolog_file);
557 td->write_iolog_file = NULL;
558 }
559
560 if (td->io_ops->flags & FIO_SYNCIO)
561 td->iodepth = 1;
562 else {
563 if (!td->iodepth)
564 td->iodepth = td->nr_files;
565 }
566
567 /*
568 * only really works for sequential io for now, and with 1 file
569 */
570 if (td->zone_size && !td->sequential && td->nr_files == 1)
571 td->zone_size = 0;
572
573 /*
574 * Reads can do overwrites, we always need to pre-create the file
575 */
576 if (td_read(td) || td_rw(td))
577 td->overwrite = 1;
578
579 if (!td->min_bs[DDIR_READ])
580 td->min_bs[DDIR_READ]= td->bs[DDIR_READ];
581 if (!td->max_bs[DDIR_READ])
582 td->max_bs[DDIR_READ] = td->bs[DDIR_READ];
583 if (!td->min_bs[DDIR_WRITE])
584 td->min_bs[DDIR_WRITE]= td->bs[DDIR_WRITE];
585 if (!td->max_bs[DDIR_WRITE])
586 td->max_bs[DDIR_WRITE] = td->bs[DDIR_WRITE];
587
588 td->rw_min_bs = min(td->min_bs[DDIR_READ], td->min_bs[DDIR_WRITE]);
589
590 if (td_read(td) && !td_rw(td))
591 td->verify = 0;
592
593 if (td->norandommap && td->verify != VERIFY_NONE) {
594 log_err("fio: norandommap given, verify disabled\n");
595 td->verify = VERIFY_NONE;
596 }
597 if (td->bs_unaligned && (td->odirect || td->io_ops->flags & FIO_RAWIO))
598 log_err("fio: bs_unaligned may not work with raw io\n");
599
600 /*
601 * O_DIRECT and char doesn't mix, clear that flag if necessary.
602 */
603 if (td->filetype == FIO_TYPE_CHAR && td->odirect)
604 td->odirect = 0;
605}
606
607/*
608 * This function leaks the buffer
609 */
610static char *to_kmg(unsigned int val)
611{
612 char *buf = malloc(32);
613 char post[] = { 0, 'K', 'M', 'G', 'P', 0 };
614 char *p = post;
615
616 do {
617 if (val & 1023)
618 break;
619
620 val >>= 10;
621 p++;
622 } while (*p);
623
624 snprintf(buf, 31, "%u%c", val, *p);
625 return buf;
626}
627
628/*
629 * Adds a job to the list of things todo. Sanitizes the various options
630 * to make sure we don't have conflicts, and initializes various
631 * members of td.
632 */
633static int add_job(struct thread_data *td, const char *jobname, int job_add_num)
634{
635 const char *ddir_str[] = { "read", "write", "randread", "randwrite",
636 "rw", NULL, "randrw" };
637 struct stat sb;
638 int numjobs, ddir, i;
639 struct fio_file *f;
640
641 /*
642 * the def_thread is just for options, it's not a real job
643 */
644 if (td == &def_thread)
645 return 0;
646
647 assert(td->io_ops);
648
649 if (td->odirect)
650 td->io_ops->flags |= FIO_RAWIO;
651
652 td->filetype = FIO_TYPE_FILE;
653 if (!stat(jobname, &sb)) {
654 if (S_ISBLK(sb.st_mode))
655 td->filetype = FIO_TYPE_BD;
656 else if (S_ISCHR(sb.st_mode))
657 td->filetype = FIO_TYPE_CHAR;
658 }
659
660 fixup_options(td);
661
662 if (td->filename)
663 td->nr_uniq_files = 1;
664 else
665 td->nr_uniq_files = td->nr_files;
666
667 if (td->filetype == FIO_TYPE_FILE || td->filename) {
668 char tmp[PATH_MAX];
669 int len = 0;
670
671 if (td->directory && td->directory[0] != '\0')
672 len = sprintf(tmp, "%s/", td->directory);
673
674 td->files = malloc(sizeof(struct fio_file) * td->nr_files);
675
676 for_each_file(td, f, i) {
677 memset(f, 0, sizeof(*f));
678 f->fd = -1;
679
680 if (td->filename)
681 sprintf(tmp + len, "%s", td->filename);
682 else
683 sprintf(tmp + len, "%s.%d.%d", jobname, td->thread_number, i);
684 f->file_name = strdup(tmp);
685 }
686 } else {
687 td->nr_files = 1;
688 td->files = malloc(sizeof(struct fio_file));
689 f = &td->files[0];
690
691 memset(f, 0, sizeof(*f));
692 f->fd = -1;
693 f->file_name = strdup(jobname);
694 }
695
696 for_each_file(td, f, i) {
697 f->file_size = td->total_file_size / td->nr_files;
698 f->file_offset = td->start_offset;
699 }
700
701 fio_sem_init(&td->mutex, 0);
702
703 td->clat_stat[0].min_val = td->clat_stat[1].min_val = ULONG_MAX;
704 td->slat_stat[0].min_val = td->slat_stat[1].min_val = ULONG_MAX;
705 td->bw_stat[0].min_val = td->bw_stat[1].min_val = ULONG_MAX;
706
707 if (td->stonewall && td->thread_number > 1)
708 groupid++;
709
710 td->groupid = groupid;
711
712 if (setup_rate(td))
713 goto err;
714
715 if (td->write_lat_log) {
716 setup_log(&td->slat_log);
717 setup_log(&td->clat_log);
718 }
719 if (td->write_bw_log)
720 setup_log(&td->bw_log);
721
722 if (!td->name)
723 td->name = strdup(jobname);
724
725 ddir = td->ddir + (!td->sequential << 1) + (td->iomix << 2);
726
727 if (!terse_output) {
728 if (!job_add_num) {
729 if (td->io_ops->flags & FIO_CPUIO)
730 fprintf(f_out, "%s: ioengine=cpu, cpuload=%u, cpucycle=%u\n", td->name, td->cpuload, td->cpucycle);
731 else {
732 char *c1, *c2, *c3, *c4;
733
734 c1 = to_kmg(td->min_bs[DDIR_READ]);
735 c2 = to_kmg(td->max_bs[DDIR_READ]);
736 c3 = to_kmg(td->min_bs[DDIR_WRITE]);
737 c4 = to_kmg(td->max_bs[DDIR_WRITE]);
738
739 fprintf(f_out, "%s: (g=%d): rw=%s, odir=%u, bs=%s-%s/%s-%s, rate=%u, ioengine=%s, iodepth=%u\n", td->name, td->groupid, ddir_str[ddir], td->odirect, c1, c2, c3, c4, td->rate, td->io_ops->name, td->iodepth);
740
741 free(c1);
742 free(c2);
743 free(c3);
744 free(c4);
745 }
746 } else if (job_add_num == 1)
747 fprintf(f_out, "...\n");
748 }
749
750 /*
751 * recurse add identical jobs, clear numjobs and stonewall options
752 * as they don't apply to sub-jobs
753 */
754 numjobs = td->numjobs;
755 while (--numjobs) {
756 struct thread_data *td_new = get_new_job(0, td);
757
758 if (!td_new)
759 goto err;
760
761 td_new->numjobs = 1;
762 td_new->stonewall = 0;
763 job_add_num = numjobs - 1;
764
765 if (add_job(td_new, jobname, job_add_num))
766 goto err;
767 }
768 return 0;
769err:
770 put_job(td);
771 return -1;
772}
773
774/*
775 * Initialize the various random states we need (random io, block size ranges,
776 * read/write mix, etc).
777 */
778int init_random_state(struct thread_data *td)
779{
780 unsigned long seeds[4];
781 int fd, num_maps, blocks, i;
782 struct fio_file *f;
783
784 if (td->io_ops->flags & FIO_CPUIO)
785 return 0;
786
787 fd = open("/dev/urandom", O_RDONLY);
788 if (fd == -1) {
789 td_verror(td, errno);
790 return 1;
791 }
792
793 if (read(fd, seeds, sizeof(seeds)) < (int) sizeof(seeds)) {
794 td_verror(td, EIO);
795 close(fd);
796 return 1;
797 }
798
799 close(fd);
800
801 os_random_seed(seeds[0], &td->bsrange_state);
802 os_random_seed(seeds[1], &td->verify_state);
803 os_random_seed(seeds[2], &td->rwmix_state);
804
805 if (td->sequential)
806 return 0;
807
808 if (td->rand_repeatable)
809 seeds[3] = FIO_RANDSEED;
810
811 if (!td->norandommap) {
812 for_each_file(td, f, i) {
813 blocks = (f->file_size + td->rw_min_bs - 1) / td->rw_min_bs;
814 num_maps = (blocks + BLOCKS_PER_MAP-1)/ BLOCKS_PER_MAP;
815 f->file_map = malloc(num_maps * sizeof(long));
816 f->num_maps = num_maps;
817 memset(f->file_map, 0, num_maps * sizeof(long));
818 }
819 }
820
821 os_random_seed(seeds[3], &td->random_state);
822 return 0;
823}
824
825static void fill_cpu_mask(os_cpu_mask_t cpumask, int cpu)
826{
827#ifdef FIO_HAVE_CPU_AFFINITY
828 unsigned int i;
829
830 CPU_ZERO(&cpumask);
831
832 for (i = 0; i < sizeof(int) * 8; i++) {
833 if ((1 << i) & cpu)
834 CPU_SET(i, &cpumask);
835 }
836#endif
837}
838
839static int is_empty_or_comment(char *line)
840{
841 unsigned int i;
842
843 for (i = 0; i < strlen(line); i++) {
844 if (line[i] == ';')
845 return 1;
846 if (!isspace(line[i]) && !iscntrl(line[i]))
847 return 0;
848 }
849
850 return 1;
851}
852
853static int str_rw_cb(void *data, const char *mem)
854{
855 struct thread_data *td = data;
856
857 if (!strncmp(mem, "read", 4) || !strncmp(mem, "0", 1)) {
858 td->ddir = DDIR_READ;
859 td->sequential = 1;
860 return 0;
861 } else if (!strncmp(mem, "randread", 8)) {
862 td->ddir = DDIR_READ;
863 td->sequential = 0;
864 return 0;
865 } else if (!strncmp(mem, "write", 5) || !strncmp(mem, "1", 1)) {
866 td->ddir = DDIR_WRITE;
867 td->sequential = 1;
868 return 0;
869 } else if (!strncmp(mem, "randwrite", 9)) {
870 td->ddir = DDIR_WRITE;
871 td->sequential = 0;
872 return 0;
873 } else if (!strncmp(mem, "rw", 2)) {
874 td->ddir = DDIR_READ;
875 td->iomix = 1;
876 td->sequential = 1;
877 return 0;
878 } else if (!strncmp(mem, "randrw", 6)) {
879 td->ddir = DDIR_READ;
880 td->iomix = 1;
881 td->sequential = 0;
882 return 0;
883 }
884
885 log_err("fio: data direction: read, write, randread, randwrite, rw, randrw\n");
886 return 1;
887}
888
889static int str_verify_cb(void *data, const char *mem)
890{
891 struct thread_data *td = data;
892
893 if (!strncmp(mem, "0", 1)) {
894 td->verify = VERIFY_NONE;
895 return 0;
896 } else if (!strncmp(mem, "md5", 3) || !strncmp(mem, "1", 1)) {
897 td->verify = VERIFY_MD5;
898 return 0;
899 } else if (!strncmp(mem, "crc32", 5)) {
900 td->verify = VERIFY_CRC32;
901 return 0;
902 }
903
904 log_err("fio: verify types: md5, crc32\n");
905 return 1;
906}
907
908/*
909 * Check if mmap/mmaphuge has a :/foo/bar/file at the end. If so, return that.
910 */
911static char *get_mmap_file(const char *str)
912{
913 char *p = strstr(str, ":");
914
915 if (!p)
916 return NULL;
917
918 p++;
919 strip_blank_front(&p);
920 strip_blank_end(p);
921 return strdup(p);
922}
923
924static int str_mem_cb(void *data, const char *mem)
925{
926 struct thread_data *td = data;
927
928 if (!strncmp(mem, "malloc", 6)) {
929 td->mem_type = MEM_MALLOC;
930 return 0;
931 } else if (!strncmp(mem, "mmaphuge", 8)) {
932#ifdef FIO_HAVE_HUGETLB
933 /*
934 * mmaphuge must be appended with the actual file
935 */
936 td->mmapfile = get_mmap_file(mem);
937 if (!td->mmapfile) {
938 log_err("fio: mmaphuge:/path/to/file\n");
939 return 1;
940 }
941
942 td->mem_type = MEM_MMAPHUGE;
943 return 0;
944#else
945 log_err("fio: mmaphuge not available\n");
946 return 1;
947#endif
948 } else if (!strncmp(mem, "mmap", 4)) {
949 /*
950 * Check if the user wants file backed memory. It's ok
951 * if there's no file given, we'll just use anon mamp then.
952 */
953 td->mmapfile = get_mmap_file(mem);
954 td->mem_type = MEM_MMAP;
955 return 0;
956 } else if (!strncmp(mem, "shmhuge", 7)) {
957#ifdef FIO_HAVE_HUGETLB
958 td->mem_type = MEM_SHMHUGE;
959 return 0;
960#else
961 log_err("fio: shmhuge not available\n");
962 return 1;
963#endif
964 } else if (!strncmp(mem, "shm", 3)) {
965 td->mem_type = MEM_SHM;
966 return 0;
967 }
968
969 log_err("fio: mem type: malloc, shm, shmhuge, mmap, mmaphuge\n");
970 return 1;
971}
972
973static int str_ioengine_cb(void *data, const char *str)
974{
975 struct thread_data *td = data;
976
977 td->io_ops = load_ioengine(td, str);
978 if (td->io_ops)
979 return 0;
980
981 log_err("fio: ioengine= libaio, posixaio, sync, mmap, sgio, splice, cpu, null\n");
982 log_err("fio: or specify path to dynamic ioengine module\n");
983 return 1;
984}
985
986static int str_lockmem_cb(void fio_unused *data, unsigned long *val)
987{
988 mlock_size = *val;
989 return 0;
990}
991
992#ifdef FIO_HAVE_IOPRIO
993static int str_prioclass_cb(void *data, unsigned int *val)
994{
995 struct thread_data *td = data;
996
997 td->ioprio |= *val << IOPRIO_CLASS_SHIFT;
998 return 0;
999}
1000
1001static int str_prio_cb(void *data, unsigned int *val)
1002{
1003 struct thread_data *td = data;
1004
1005 td->ioprio |= *val;
1006 return 0;
1007}
1008#endif
1009
1010static int str_exitall_cb(void)
1011{
1012 exitall_on_terminate = 1;
1013 return 0;
1014}
1015
1016static int str_cpumask_cb(void *data, unsigned int *val)
1017{
1018 struct thread_data *td = data;
1019
1020 fill_cpu_mask(td->cpumask, *val);
1021 return 0;
1022}
1023
1024/*
1025 * This is our [ini] type file parser.
1026 */
1027static int parse_jobs_ini(char *file, int stonewall_flag)
1028{
1029 unsigned int global;
1030 struct thread_data *td;
1031 char *string, *name;
1032 fpos_t off;
1033 FILE *f;
1034 char *p;
1035 int ret = 0, stonewall;
1036
1037 f = fopen(file, "r");
1038 if (!f) {
1039 perror("fopen job file");
1040 return 1;
1041 }
1042
1043 string = malloc(4096);
1044 name = malloc(256);
1045 memset(name, 0, 256);
1046
1047 stonewall = stonewall_flag;
1048 do {
1049 p = fgets(string, 4095, f);
1050 if (!p)
1051 break;
1052 if (is_empty_or_comment(p))
1053 continue;
1054 if (sscanf(p, "[%255s]", name) != 1)
1055 continue;
1056
1057 global = !strncmp(name, "global", 6);
1058
1059 name[strlen(name) - 1] = '\0';
1060
1061 td = get_new_job(global, &def_thread);
1062 if (!td) {
1063 ret = 1;
1064 break;
1065 }
1066
1067 /*
1068 * Seperate multiple job files by a stonewall
1069 */
1070 if (!global && stonewall) {
1071 td->stonewall = stonewall;
1072 stonewall = 0;
1073 }
1074
1075 fgetpos(f, &off);
1076 while ((p = fgets(string, 4096, f)) != NULL) {
1077 if (is_empty_or_comment(p))
1078 continue;
1079
1080 strip_blank_front(&p);
1081
1082 if (p[0] == '[')
1083 break;
1084
1085 strip_blank_end(p);
1086
1087 fgetpos(f, &off);
1088
1089 /*
1090 * Don't break here, continue parsing options so we
1091 * dump all the bad ones. Makes trial/error fixups
1092 * easier on the user.
1093 */
1094 ret |= parse_option(p, options, td);
1095 }
1096
1097 if (!ret) {
1098 fsetpos(f, &off);
1099 ret = add_job(td, name, 0);
1100 } else {
1101 log_err("fio: job %s dropped\n", name);
1102 put_job(td);
1103 }
1104 } while (!ret);
1105
1106 free(string);
1107 free(name);
1108 fclose(f);
1109 return ret;
1110}
1111
1112static int fill_def_thread(void)
1113{
1114 memset(&def_thread, 0, sizeof(def_thread));
1115
1116 if (fio_getaffinity(getpid(), &def_thread.cpumask) == -1) {
1117 perror("sched_getaffinity");
1118 return 1;
1119 }
1120
1121 /*
1122 * fill default options
1123 */
1124 fill_default_options(&def_thread, options);
1125
1126 def_thread.timeout = def_timeout;
1127 def_thread.write_bw_log = write_bw_log;
1128 def_thread.write_lat_log = write_lat_log;
1129
1130#ifdef FIO_HAVE_DISK_UTIL
1131 def_thread.do_disk_util = 1;
1132#endif
1133
1134 return 0;
1135}
1136
1137static void usage(void)
1138{
1139 printf("%s\n", fio_version_string);
1140 printf("\t--output\tWrite output to file\n");
1141 printf("\t--timeout\tRuntime in seconds\n");
1142 printf("\t--latency-log\tGenerate per-job latency logs\n");
1143 printf("\t--bandwidth-log\tGenerate per-job bandwidth logs\n");
1144 printf("\t--minimal\tMinimal (terse) output\n");
1145 printf("\t--version\tPrint version info and exit\n");
1146 printf("\t--help\t\tPrint this page\n");
1147 printf("\t--cmdhelp=cmd\tPrint command help, \"all\" for all of them\n");
1148}
1149
1150static int parse_cmd_line(int argc, char *argv[])
1151{
1152 struct thread_data *td = NULL;
1153 int c, ini_idx = 0, lidx, ret;
1154
1155 while ((c = getopt_long(argc, argv, "", long_options, &lidx)) != -1) {
1156 switch (c) {
1157 case 't':
1158 def_timeout = atoi(optarg);
1159 break;
1160 case 'l':
1161 write_lat_log = 1;
1162 break;
1163 case 'w':
1164 write_bw_log = 1;
1165 break;
1166 case 'o':
1167 f_out = fopen(optarg, "w+");
1168 if (!f_out) {
1169 perror("fopen output");
1170 exit(1);
1171 }
1172 f_err = f_out;
1173 break;
1174 case 'm':
1175 terse_output = 1;
1176 break;
1177 case 'h':
1178 usage();
1179 exit(0);
1180 case 'c':
1181 ret = show_cmd_help(options, optarg);
1182 exit(ret);
1183 case 'v':
1184 printf("%s\n", fio_version_string);
1185 exit(0);
1186 case FIO_GETOPT_JOB: {
1187 const char *opt = long_options[lidx].name;
1188 char *val = optarg;
1189
1190 if (!strncmp(opt, "name", 4) && td) {
1191 ret = add_job(td, td->name ?: "fio", 0);
1192 if (ret) {
1193 put_job(td);
1194 return 0;
1195 }
1196 td = NULL;
1197 }
1198 if (!td) {
1199 int global = !strncmp(val, "global", 6);
1200
1201 td = get_new_job(global, &def_thread);
1202 if (!td)
1203 return 0;
1204 }
1205
1206 ret = parse_cmd_option(opt, val, options, td);
1207 if (ret) {
1208 log_err("fio: job dropped\n");
1209 put_job(td);
1210 td = NULL;
1211 }
1212 break;
1213 }
1214 default:
1215 break;
1216 }
1217 }
1218
1219 if (td) {
1220 ret = add_job(td, td->name ?: "fio", 0);
1221 if (ret)
1222 put_job(td);
1223 }
1224
1225 while (optind < argc) {
1226 ini_idx++;
1227 ini_file = realloc(ini_file, ini_idx * sizeof(char *));
1228 ini_file[ini_idx - 1] = strdup(argv[optind]);
1229 optind++;
1230 }
1231
1232 return ini_idx;
1233}
1234
1235static void free_shm(void)
1236{
1237 struct shmid_ds sbuf;
1238
1239 if (threads) {
1240 shmdt((void *) threads);
1241 threads = NULL;
1242 shmctl(shm_id, IPC_RMID, &sbuf);
1243 }
1244}
1245
1246/*
1247 * The thread area is shared between the main process and the job
1248 * threads/processes. So setup a shared memory segment that will hold
1249 * all the job info.
1250 */
1251static int setup_thread_area(void)
1252{
1253 /*
1254 * 1024 is too much on some machines, scale max_jobs if
1255 * we get a failure that looks like too large a shm segment
1256 */
1257 do {
1258 size_t size = max_jobs * sizeof(struct thread_data);
1259
1260 shm_id = shmget(0, size, IPC_CREAT | 0600);
1261 if (shm_id != -1)
1262 break;
1263 if (errno != EINVAL) {
1264 perror("shmget");
1265 break;
1266 }
1267
1268 max_jobs >>= 1;
1269 } while (max_jobs);
1270
1271 if (shm_id == -1)
1272 return 1;
1273
1274 threads = shmat(shm_id, NULL, 0);
1275 if (threads == (void *) -1) {
1276 perror("shmat");
1277 return 1;
1278 }
1279
1280 atexit(free_shm);
1281 return 0;
1282}
1283
1284/*
1285 * Copy the fio options into the long options map, so we mirror
1286 * job and cmd line options.
1287 */
1288static void dupe_job_options(void)
1289{
1290 struct fio_option *o;
1291 unsigned int i;
1292
1293 i = 0;
1294 while (long_options[i].name)
1295 i++;
1296
1297 o = &options[0];
1298 while (o->name) {
1299 long_options[i].name = o->name;
1300 long_options[i].val = FIO_GETOPT_JOB;
1301 if (o->type == FIO_OPT_STR_SET)
1302 long_options[i].has_arg = no_argument;
1303 else
1304 long_options[i].has_arg = required_argument;
1305
1306 i++;
1307 o++;
1308 assert(i < FIO_JOB_OPTS + FIO_CMD_OPTS);
1309 }
1310}
1311
1312int parse_options(int argc, char *argv[])
1313{
1314 int job_files, i;
1315
1316 f_out = stdout;
1317 f_err = stderr;
1318
1319 dupe_job_options();
1320
1321 if (setup_thread_area())
1322 return 1;
1323 if (fill_def_thread())
1324 return 1;
1325
1326 job_files = parse_cmd_line(argc, argv);
1327
1328 for (i = 0; i < job_files; i++) {
1329 if (fill_def_thread())
1330 return 1;
1331 if (parse_jobs_ini(ini_file[i], i))
1332 return 1;
1333 free(ini_file[i]);
1334 }
1335
1336 free(ini_file);
1337
1338 if (!thread_number) {
1339 log_err("No jobs defined(s)\n");
1340 return 1;
1341 }
1342
1343 return 0;
1344}
fio - Flexible IO Tester