7d4c96a2b8a5045cda742f4be7842deb66529637
[fio.git] / fio.c
1 /*
2  * fio - the flexible io tester
3  *
4  * Copyright (C) 2005 Jens Axboe <axboe@suse.de>
5  * Copyright (C) 2006 Jens Axboe <axboe@kernel.dk>
6  *
7  * The license below covers all files distributed with fio unless otherwise
8  * noted in the file itself.
9  *
10  *  This program is free software; you can redistribute it and/or modify
11  *  it under the terms of the GNU General Public License version 2 as
12  *  published by the Free Software Foundation.
13  *
14  *  This program is distributed in the hope that it will be useful,
15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  *  GNU General Public License for more details.
18  *
19  *  You should have received a copy of the GNU General Public License
20  *  along with this program; if not, write to the Free Software
21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22  *
23  */
24 #include <unistd.h>
25 #include <fcntl.h>
26 #include <string.h>
27 #include <signal.h>
28 #include <time.h>
29 #include <locale.h>
30 #include <assert.h>
31 #include <sys/stat.h>
32 #include <sys/wait.h>
33 #include <sys/ipc.h>
34 #include <sys/shm.h>
35 #include <sys/mman.h>
36
37 #include "fio.h"
38 #include "hash.h"
39 #include "smalloc.h"
40 #include "verify.h"
41 #include "diskutil.h"
42 #include "cgroup.h"
43
44 unsigned long page_mask;
45 unsigned long page_size;
46
47 #define PAGE_ALIGN(buf) \
48         (char *) (((unsigned long) (buf) + page_mask) & ~page_mask)
49
50 int groupid = 0;
51 int thread_number = 0;
52 int nr_process = 0;
53 int nr_thread = 0;
54 int shm_id = 0;
55 int temp_stall_ts;
56 unsigned long done_secs = 0;
57
58 static struct fio_mutex *startup_mutex;
59 static struct fio_mutex *writeout_mutex;
60 static volatile int fio_abort;
61 static int exit_value;
62 static struct itimerval itimer;
63 static pthread_t gtod_thread;
64 static struct flist_head *cgroup_list;
65 static char *cgroup_mnt;
66
67 struct io_log *agg_io_log[2];
68
69 #define TERMINATE_ALL           (-1)
70 #define JOB_START_TIMEOUT       (5 * 1000)
71
72 void td_set_runstate(struct thread_data *td, int runstate)
73 {
74         if (td->runstate == runstate)
75                 return;
76
77         dprint(FD_PROCESS, "pid=%d: runstate %d -> %d\n", (int) td->pid,
78                                                 td->runstate, runstate);
79         td->runstate = runstate;
80 }
81
82 static void terminate_threads(int group_id)
83 {
84         struct thread_data *td;
85         int i;
86
87         dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
88
89         for_each_td(td, i) {
90                 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
91                         dprint(FD_PROCESS, "setting terminate on %s/%d\n",
92                                                 td->o.name, (int) td->pid);
93                         td->terminate = 1;
94                         td->o.start_delay = 0;
95
96                         /*
97                          * if the thread is running, just let it exit
98                          */
99                         if (td->runstate < TD_RUNNING)
100                                 kill(td->pid, SIGQUIT);
101                         else {
102                                 struct ioengine_ops *ops = td->io_ops;
103
104                                 if (ops && (ops->flags & FIO_SIGQUIT))
105                                         kill(td->pid, SIGQUIT);
106                         }
107                 }
108         }
109 }
110
111 static void status_timer_arm(void)
112 {
113         itimer.it_value.tv_sec = 0;
114         itimer.it_value.tv_usec = DISK_UTIL_MSEC * 1000;
115         setitimer(ITIMER_REAL, &itimer, NULL);
116 }
117
118 static void sig_alrm(int fio_unused sig)
119 {
120         if (threads) {
121                 update_io_ticks();
122                 print_thread_status();
123                 status_timer_arm();
124         }
125 }
126
127 /*
128  * Happens on thread runs with ctrl-c, ignore our own SIGQUIT
129  */
130 static void sig_quit(int sig)
131 {
132 }
133
134 static void sig_int(int sig)
135 {
136         if (threads) {
137                 printf("\nfio: terminating on signal %d\n", sig);
138                 fflush(stdout);
139                 terminate_threads(TERMINATE_ALL);
140         }
141 }
142
143 static void sig_ill(int fio_unused sig)
144 {
145         if (!threads)
146                 return;
147
148         log_err("fio: illegal instruction. your cpu does not support "
149                 "the sse4.2 instruction for crc32c\n");
150         terminate_threads(TERMINATE_ALL);
151         exit(4);
152 }
153
154 static void set_sig_handlers(void)
155 {
156         struct sigaction act;
157
158         memset(&act, 0, sizeof(act));
159         act.sa_handler = sig_alrm;
160         act.sa_flags = SA_RESTART;
161         sigaction(SIGALRM, &act, NULL);
162
163         memset(&act, 0, sizeof(act));
164         act.sa_handler = sig_int;
165         act.sa_flags = SA_RESTART;
166         sigaction(SIGINT, &act, NULL);
167
168         memset(&act, 0, sizeof(act));
169         act.sa_handler = sig_ill;
170         act.sa_flags = SA_RESTART;
171         sigaction(SIGILL, &act, NULL);
172
173         memset(&act, 0, sizeof(act));
174         act.sa_handler = sig_quit;
175         act.sa_flags = SA_RESTART;
176         sigaction(SIGQUIT, &act, NULL);
177 }
178
179 /*
180  * Check if we are above the minimum rate given.
181  */
182 static int __check_min_rate(struct thread_data *td, struct timeval *now,
183                             enum td_ddir ddir)
184 {
185         unsigned long long bytes = 0;
186         unsigned long iops = 0;
187         unsigned long spent;
188         unsigned long rate;
189         unsigned int ratemin = 0;
190         unsigned int rate_iops = 0;
191         unsigned int rate_iops_min = 0;
192
193         if (!td->o.ratemin[ddir] && !td->o.rate_iops_min[ddir])
194                 return 0;
195
196         /*
197          * allow a 2 second settle period in the beginning
198          */
199         if (mtime_since(&td->start, now) < 2000)
200                 return 0;
201
202         iops += td->io_blocks[ddir];
203         bytes += td->this_io_bytes[ddir];
204         ratemin += td->o.ratemin[ddir];
205         rate_iops += td->o.rate_iops[ddir];
206         rate_iops_min += td->o.rate_iops_min[ddir];
207
208         /*
209          * if rate blocks is set, sample is running
210          */
211         if (td->rate_bytes[ddir] || td->rate_blocks[ddir]) {
212                 spent = mtime_since(&td->lastrate[ddir], now);
213                 if (spent < td->o.ratecycle)
214                         return 0;
215
216                 if (td->o.rate[ddir]) {
217                         /*
218                          * check bandwidth specified rate
219                          */
220                         if (bytes < td->rate_bytes[ddir]) {
221                                 log_err("%s: min rate %u not met\n", td->o.name,
222                                                                 ratemin);
223                                 return 1;
224                         } else {
225                                 rate = ((bytes - td->rate_bytes[ddir]) * 1000) / spent;
226                                 if (rate < ratemin ||
227                                     bytes < td->rate_bytes[ddir]) {
228                                         log_err("%s: min rate %u not met, got"
229                                                 " %luKB/sec\n", td->o.name,
230                                                         ratemin, rate);
231                                         return 1;
232                                 }
233                         }
234                 } else {
235                         /*
236                          * checks iops specified rate
237                          */
238                         if (iops < rate_iops) {
239                                 log_err("%s: min iops rate %u not met\n",
240                                                 td->o.name, rate_iops);
241                                 return 1;
242                         } else {
243                                 rate = ((iops - td->rate_blocks[ddir]) * 1000) / spent;
244                                 if (rate < rate_iops_min ||
245                                     iops < td->rate_blocks[ddir]) {
246                                         log_err("%s: min iops rate %u not met,"
247                                                 " got %lu\n", td->o.name,
248                                                         rate_iops_min, rate);
249                                 }
250                         }
251                 }
252         }
253
254         td->rate_bytes[ddir] = bytes;
255         td->rate_blocks[ddir] = iops;
256         memcpy(&td->lastrate[ddir], now, sizeof(*now));
257         return 0;
258 }
259
260 static int check_min_rate(struct thread_data *td, struct timeval *now,
261                           unsigned long *bytes_done)
262 {
263         int ret = 0;
264
265         if (bytes_done[0])
266                 ret |= __check_min_rate(td, now, 0);
267         if (bytes_done[1])
268                 ret |= __check_min_rate(td, now, 1);
269
270         return ret;
271 }
272
273 static inline int runtime_exceeded(struct thread_data *td, struct timeval *t)
274 {
275         if (!td->o.timeout)
276                 return 0;
277         if (mtime_since(&td->epoch, t) >= td->o.timeout * 1000)
278                 return 1;
279
280         return 0;
281 }
282
283 /*
284  * When job exits, we can cancel the in-flight IO if we are using async
285  * io. Attempt to do so.
286  */
287 static void cleanup_pending_aio(struct thread_data *td)
288 {
289         struct flist_head *entry, *n;
290         struct io_u *io_u;
291         int r;
292
293         /*
294          * get immediately available events, if any
295          */
296         r = io_u_queued_complete(td, 0, NULL);
297         if (r < 0)
298                 return;
299
300         /*
301          * now cancel remaining active events
302          */
303         if (td->io_ops->cancel) {
304                 flist_for_each_safe(entry, n, &td->io_u_busylist) {
305                         io_u = flist_entry(entry, struct io_u, list);
306
307                         /*
308                          * if the io_u isn't in flight, then that generally
309                          * means someone leaked an io_u. complain but fix
310                          * it up, so we don't stall here.
311                          */
312                         if ((io_u->flags & IO_U_F_FLIGHT) == 0) {
313                                 log_err("fio: non-busy IO on busy list\n");
314                                 put_io_u(td, io_u);
315                         } else {
316                                 r = td->io_ops->cancel(td, io_u);
317                                 if (!r)
318                                         put_io_u(td, io_u);
319                         }
320                 }
321         }
322
323         if (td->cur_depth)
324                 r = io_u_queued_complete(td, td->cur_depth, NULL);
325 }
326
327 /*
328  * Helper to handle the final sync of a file. Works just like the normal
329  * io path, just does everything sync.
330  */
331 static int fio_io_sync(struct thread_data *td, struct fio_file *f)
332 {
333         struct io_u *io_u = __get_io_u(td);
334         int ret;
335
336         if (!io_u)
337                 return 1;
338
339         io_u->ddir = DDIR_SYNC;
340         io_u->file = f;
341
342         if (td_io_prep(td, io_u)) {
343                 put_io_u(td, io_u);
344                 return 1;
345         }
346
347 requeue:
348         ret = td_io_queue(td, io_u);
349         if (ret < 0) {
350                 td_verror(td, io_u->error, "td_io_queue");
351                 put_io_u(td, io_u);
352                 return 1;
353         } else if (ret == FIO_Q_QUEUED) {
354                 if (io_u_queued_complete(td, 1, NULL) < 0)
355                         return 1;
356         } else if (ret == FIO_Q_COMPLETED) {
357                 if (io_u->error) {
358                         td_verror(td, io_u->error, "td_io_queue");
359                         return 1;
360                 }
361
362                 if (io_u_sync_complete(td, io_u, NULL) < 0)
363                         return 1;
364         } else if (ret == FIO_Q_BUSY) {
365                 if (td_io_commit(td))
366                         return 1;
367                 goto requeue;
368         }
369
370         return 0;
371 }
372
373 static inline void update_tv_cache(struct thread_data *td)
374 {
375         if ((++td->tv_cache_nr & td->tv_cache_mask) == td->tv_cache_mask)
376                 fio_gettime(&td->tv_cache, NULL);
377 }
378
379 static int break_on_this_error(struct thread_data *td, int *retptr)
380 {
381         int ret = *retptr;
382
383         if (ret < 0 || td->error) {
384                 int err;
385
386                 if (!td->o.continue_on_error)
387                         return 1;
388
389                 if (ret < 0)
390                         err = -ret;
391                 else
392                         err = td->error;
393
394                 if (td_non_fatal_error(err)) {
395                         /*
396                          * Continue with the I/Os in case of
397                          * a non fatal error.
398                          */
399                         update_error_count(td, err);
400                         td_clear_error(td);
401                         *retptr = 0;
402                         return 0;
403                 } else if (td->o.fill_device && err == ENOSPC) {
404                         /*
405                          * We expect to hit this error if
406                          * fill_device option is set.
407                          */
408                         td_clear_error(td);
409                         td->terminate = 1;
410                         return 1;
411                 } else {
412                         /*
413                          * Stop the I/O in case of a fatal
414                          * error.
415                          */
416                         update_error_count(td, err);
417                         return 1;
418                 }
419         }
420
421         return 0;
422 }
423
424 /*
425  * The main verify engine. Runs over the writes we previously submitted,
426  * reads the blocks back in, and checks the crc/md5 of the data.
427  */
428 static void do_verify(struct thread_data *td)
429 {
430         struct fio_file *f;
431         struct io_u *io_u;
432         int ret, min_events;
433         unsigned int i;
434
435         /*
436          * sync io first and invalidate cache, to make sure we really
437          * read from disk.
438          */
439         for_each_file(td, f, i) {
440                 if (!fio_file_open(f))
441                         continue;
442                 if (fio_io_sync(td, f))
443                         break;
444                 if (file_invalidate_cache(td, f))
445                         break;
446         }
447
448         if (td->error)
449                 return;
450
451         td_set_runstate(td, TD_VERIFYING);
452
453         io_u = NULL;
454         while (!td->terminate) {
455                 int ret2, full;
456
457                 update_tv_cache(td);
458
459                 if (runtime_exceeded(td, &td->tv_cache)) {
460                         td->terminate = 1;
461                         break;
462                 }
463
464                 io_u = __get_io_u(td);
465                 if (!io_u)
466                         break;
467
468                 if (get_next_verify(td, io_u)) {
469                         put_io_u(td, io_u);
470                         break;
471                 }
472
473                 if (td_io_prep(td, io_u)) {
474                         put_io_u(td, io_u);
475                         break;
476                 }
477
478                 if (td->o.verify_async)
479                         io_u->end_io = verify_io_u_async;
480                 else
481                         io_u->end_io = verify_io_u;
482
483                 ret = td_io_queue(td, io_u);
484                 switch (ret) {
485                 case FIO_Q_COMPLETED:
486                         if (io_u->error) {
487                                 ret = -io_u->error;
488                                 clear_io_u(td, io_u);
489                         } else if (io_u->resid) {
490                                 int bytes = io_u->xfer_buflen - io_u->resid;
491                                 struct fio_file *f = io_u->file;
492
493                                 /*
494                                  * zero read, fail
495                                  */
496                                 if (!bytes) {
497                                         td_verror(td, EIO, "full resid");
498                                         put_io_u(td, io_u);
499                                         break;
500                                 }
501
502                                 io_u->xfer_buflen = io_u->resid;
503                                 io_u->xfer_buf += bytes;
504                                 io_u->offset += bytes;
505
506                                 td->ts.short_io_u[io_u->ddir]++;
507
508                                 if (io_u->offset == f->real_file_size)
509                                         goto sync_done;
510
511                                 requeue_io_u(td, &io_u);
512                         } else {
513 sync_done:
514                                 ret = io_u_sync_complete(td, io_u, NULL);
515                                 if (ret < 0)
516                                         break;
517                         }
518                         continue;
519                 case FIO_Q_QUEUED:
520                         break;
521                 case FIO_Q_BUSY:
522                         requeue_io_u(td, &io_u);
523                         ret2 = td_io_commit(td);
524                         if (ret2 < 0)
525                                 ret = ret2;
526                         break;
527                 default:
528                         assert(ret < 0);
529                         td_verror(td, -ret, "td_io_queue");
530                         break;
531                 }
532
533                 if (break_on_this_error(td, &ret))
534                         break;
535
536                 /*
537                  * if we can queue more, do so. but check if there are
538                  * completed io_u's first.
539                  */
540                 full = queue_full(td) || ret == FIO_Q_BUSY;
541                 if (full || !td->o.iodepth_batch_complete) {
542                         min_events = min(td->o.iodepth_batch_complete,
543                                          td->cur_depth);
544                         if (full && !min_events)
545                                 min_events = 1;
546
547                         do {
548                                 /*
549                                  * Reap required number of io units, if any,
550                                  * and do the verification on them through
551                                  * the callback handler
552                                  */
553                                 if (io_u_queued_complete(td, min_events, NULL) < 0) {
554                                         ret = -1;
555                                         break;
556                                 }
557                         } while (full && (td->cur_depth > td->o.iodepth_low));
558                 }
559                 if (ret < 0)
560                         break;
561         }
562
563         if (!td->error) {
564                 min_events = td->cur_depth;
565
566                 if (min_events)
567                         ret = io_u_queued_complete(td, min_events, NULL);
568         } else
569                 cleanup_pending_aio(td);
570
571         td_set_runstate(td, TD_RUNNING);
572 }
573
574 /*
575  * Main IO worker function. It retrieves io_u's to process and queues
576  * and reaps them, checking for rate and errors along the way.
577  */
578 static void do_io(struct thread_data *td)
579 {
580         unsigned int i;
581         int ret = 0;
582
583         if (in_ramp_time(td))
584                 td_set_runstate(td, TD_RAMP);
585         else
586                 td_set_runstate(td, TD_RUNNING);
587
588         while ( (td->o.read_iolog_file && !flist_empty(&td->io_log_list)) ||
589                 ((td->this_io_bytes[0] + td->this_io_bytes[1]) < td->o.size) ) {
590                 struct timeval comp_time;
591                 unsigned long bytes_done[2] = { 0, 0 };
592                 int min_evts = 0;
593                 struct io_u *io_u;
594                 int ret2, full;
595
596                 if (td->terminate)
597                         break;
598
599                 update_tv_cache(td);
600
601                 if (runtime_exceeded(td, &td->tv_cache)) {
602                         td->terminate = 1;
603                         break;
604                 }
605
606                 io_u = get_io_u(td);
607                 if (!io_u)
608                         break;
609
610                 /*
611                  * Add verification end_io handler, if asked to verify
612                  * a previously written file.
613                  */
614                 if (td->o.verify != VERIFY_NONE && io_u->ddir == DDIR_READ &&
615                     !td_rw(td)) {
616                         if (td->o.verify_async)
617                                 io_u->end_io = verify_io_u_async;
618                         else
619                                 io_u->end_io = verify_io_u;
620                         td_set_runstate(td, TD_VERIFYING);
621                 } else if (in_ramp_time(td))
622                         td_set_runstate(td, TD_RAMP);
623                 else
624                         td_set_runstate(td, TD_RUNNING);
625
626                 ret = td_io_queue(td, io_u);
627                 switch (ret) {
628                 case FIO_Q_COMPLETED:
629                         if (io_u->error) {
630                                 ret = -io_u->error;
631                                 clear_io_u(td, io_u);
632                         } else if (io_u->resid) {
633                                 int bytes = io_u->xfer_buflen - io_u->resid;
634                                 struct fio_file *f = io_u->file;
635
636                                 /*
637                                  * zero read, fail
638                                  */
639                                 if (!bytes) {
640                                         td_verror(td, EIO, "full resid");
641                                         put_io_u(td, io_u);
642                                         break;
643                                 }
644
645                                 io_u->xfer_buflen = io_u->resid;
646                                 io_u->xfer_buf += bytes;
647                                 io_u->offset += bytes;
648
649                                 td->ts.short_io_u[io_u->ddir]++;
650
651                                 if (io_u->offset == f->real_file_size)
652                                         goto sync_done;
653
654                                 requeue_io_u(td, &io_u);
655                         } else {
656 sync_done:
657                                 if (__should_check_rate(td, 0) ||
658                                     __should_check_rate(td, 1))
659                                         fio_gettime(&comp_time, NULL);
660
661                                 ret = io_u_sync_complete(td, io_u, bytes_done);
662                                 if (ret < 0)
663                                         break;
664                         }
665                         break;
666                 case FIO_Q_QUEUED:
667                         /*
668                          * if the engine doesn't have a commit hook,
669                          * the io_u is really queued. if it does have such
670                          * a hook, it has to call io_u_queued() itself.
671                          */
672                         if (td->io_ops->commit == NULL)
673                                 io_u_queued(td, io_u);
674                         break;
675                 case FIO_Q_BUSY:
676                         requeue_io_u(td, &io_u);
677                         ret2 = td_io_commit(td);
678                         if (ret2 < 0)
679                                 ret = ret2;
680                         break;
681                 default:
682                         assert(ret < 0);
683                         put_io_u(td, io_u);
684                         break;
685                 }
686
687                 if (break_on_this_error(td, &ret))
688                         break;
689
690                 /*
691                  * See if we need to complete some commands
692                  */
693                 full = queue_full(td) || ret == FIO_Q_BUSY;
694                 if (full || !td->o.iodepth_batch_complete) {
695                         min_evts = min(td->o.iodepth_batch_complete,
696                                         td->cur_depth);
697                         if (full && !min_evts)
698                                 min_evts = 1;
699
700                         if (__should_check_rate(td, 0) ||
701                             __should_check_rate(td, 1))
702                                 fio_gettime(&comp_time, NULL);
703
704                         do {
705                                 ret = io_u_queued_complete(td, min_evts, bytes_done);
706                                 if (ret < 0)
707                                         break;
708
709                         } while (full && (td->cur_depth > td->o.iodepth_low));
710                 }
711
712                 if (ret < 0)
713                         break;
714                 if (!(bytes_done[0] + bytes_done[1]))
715                         continue;
716
717                 if (!in_ramp_time(td) && should_check_rate(td, bytes_done)) {
718                         if (check_min_rate(td, &comp_time, bytes_done)) {
719                                 if (exitall_on_terminate)
720                                         terminate_threads(td->groupid);
721                                 td_verror(td, EIO, "check_min_rate");
722                                 break;
723                         }
724                 }
725
726                 if (td->o.thinktime) {
727                         unsigned long long b;
728
729                         b = td->io_blocks[0] + td->io_blocks[1];
730                         if (!(b % td->o.thinktime_blocks)) {
731                                 int left;
732
733                                 if (td->o.thinktime_spin)
734                                         usec_spin(td->o.thinktime_spin);
735
736                                 left = td->o.thinktime - td->o.thinktime_spin;
737                                 if (left)
738                                         usec_sleep(td, left);
739                         }
740                 }
741         }
742
743         if (td->o.fill_device && td->error == ENOSPC) {
744                 td->error = 0;
745                 td->terminate = 1;
746         }
747         if (!td->error) {
748                 struct fio_file *f;
749
750                 i = td->cur_depth;
751                 if (i)
752                         ret = io_u_queued_complete(td, i, NULL);
753
754                 if (should_fsync(td) && td->o.end_fsync) {
755                         td_set_runstate(td, TD_FSYNCING);
756
757                         for_each_file(td, f, i) {
758                                 if (!fio_file_open(f))
759                                         continue;
760                                 fio_io_sync(td, f);
761                         }
762                 }
763         } else
764                 cleanup_pending_aio(td);
765
766         /*
767          * stop job if we failed doing any IO
768          */
769         if ((td->this_io_bytes[0] + td->this_io_bytes[1]) == 0)
770                 td->done = 1;
771 }
772
773 static void cleanup_io_u(struct thread_data *td)
774 {
775         struct flist_head *entry, *n;
776         struct io_u *io_u;
777
778         flist_for_each_safe(entry, n, &td->io_u_freelist) {
779                 io_u = flist_entry(entry, struct io_u, list);
780
781                 flist_del(&io_u->list);
782                 free(io_u);
783         }
784
785         free_io_mem(td);
786 }
787
788 static int init_io_u(struct thread_data *td)
789 {
790         struct io_u *io_u;
791         unsigned int max_bs;
792         int cl_align, i, max_units;
793         char *p;
794
795         max_units = td->o.iodepth;
796         max_bs = max(td->o.max_bs[DDIR_READ], td->o.max_bs[DDIR_WRITE]);
797         td->orig_buffer_size = (unsigned long long) max_bs
798                                         * (unsigned long long) max_units;
799
800         if (td->o.mem_type == MEM_SHMHUGE || td->o.mem_type == MEM_MMAPHUGE) {
801                 unsigned long bs;
802
803                 bs = td->orig_buffer_size + td->o.hugepage_size - 1;
804                 td->orig_buffer_size = bs & ~(td->o.hugepage_size - 1);
805         }
806
807         if (td->orig_buffer_size != (size_t) td->orig_buffer_size) {
808                 log_err("fio: IO memory too large. Reduce max_bs or iodepth\n");
809                 return 1;
810         }
811
812         if (allocate_io_mem(td))
813                 return 1;
814
815         if (td->o.odirect || td->o.mem_align)
816                 p = PAGE_ALIGN(td->orig_buffer) + td->o.mem_align;
817         else
818                 p = td->orig_buffer;
819
820         cl_align = os_cache_line_size();
821
822         for (i = 0; i < max_units; i++) {
823                 void *ptr;
824
825                 if (td->terminate)
826                         return 1;
827
828                 if (posix_memalign(&ptr, cl_align, sizeof(*io_u))) {
829                         log_err("fio: posix_memalign=%s\n", strerror(errno));
830                         break;
831                 }
832
833                 io_u = ptr;
834                 memset(io_u, 0, sizeof(*io_u));
835                 INIT_FLIST_HEAD(&io_u->list);
836                 dprint(FD_MEM, "io_u alloc %p, index %u\n", io_u, i);
837
838                 if (!(td->io_ops->flags & FIO_NOIO)) {
839                         io_u->buf = p + max_bs * i;
840                         dprint(FD_MEM, "io_u %p, mem %p\n", io_u, io_u->buf);
841
842                         if (td_write(td) && !td->o.refill_buffers)
843                                 io_u_fill_buffer(td, io_u, max_bs);
844                 }
845
846                 io_u->index = i;
847                 io_u->flags = IO_U_F_FREE;
848                 flist_add(&io_u->list, &td->io_u_freelist);
849         }
850
851         return 0;
852 }
853
854 static int switch_ioscheduler(struct thread_data *td)
855 {
856         char tmp[256], tmp2[128];
857         FILE *f;
858         int ret;
859
860         if (td->io_ops->flags & FIO_DISKLESSIO)
861                 return 0;
862
863         sprintf(tmp, "%s/queue/scheduler", td->sysfs_root);
864
865         f = fopen(tmp, "r+");
866         if (!f) {
867                 if (errno == ENOENT) {
868                         log_err("fio: os or kernel doesn't support IO scheduler"
869                                 " switching\n");
870                         return 0;
871                 }
872                 td_verror(td, errno, "fopen iosched");
873                 return 1;
874         }
875
876         /*
877          * Set io scheduler.
878          */
879         ret = fwrite(td->o.ioscheduler, strlen(td->o.ioscheduler), 1, f);
880         if (ferror(f) || ret != 1) {
881                 td_verror(td, errno, "fwrite");
882                 fclose(f);
883                 return 1;
884         }
885
886         rewind(f);
887
888         /*
889          * Read back and check that the selected scheduler is now the default.
890          */
891         ret = fread(tmp, 1, sizeof(tmp), f);
892         if (ferror(f) || ret < 0) {
893                 td_verror(td, errno, "fread");
894                 fclose(f);
895                 return 1;
896         }
897
898         sprintf(tmp2, "[%s]", td->o.ioscheduler);
899         if (!strstr(tmp, tmp2)) {
900                 log_err("fio: io scheduler %s not found\n", td->o.ioscheduler);
901                 td_verror(td, EINVAL, "iosched_switch");
902                 fclose(f);
903                 return 1;
904         }
905
906         fclose(f);
907         return 0;
908 }
909
910 static int keep_running(struct thread_data *td)
911 {
912         unsigned long long io_done;
913
914         if (td->done)
915                 return 0;
916         if (td->o.time_based)
917                 return 1;
918         if (td->o.loops) {
919                 td->o.loops--;
920                 return 1;
921         }
922
923         io_done = td->io_bytes[DDIR_READ] + td->io_bytes[DDIR_WRITE]
924                         + td->io_skip_bytes;
925         if (io_done < td->o.size)
926                 return 1;
927
928         return 0;
929 }
930
931 static void reset_io_counters(struct thread_data *td)
932 {
933         td->ts.stat_io_bytes[0] = td->ts.stat_io_bytes[1] = 0;
934         td->this_io_bytes[0] = td->this_io_bytes[1] = 0;
935         td->zone_bytes = 0;
936         td->rate_bytes[0] = td->rate_bytes[1] = 0;
937         td->rate_blocks[0] = td->rate_blocks[1] = 0;
938
939         td->last_was_sync = 0;
940
941         /*
942          * reset file done count if we are to start over
943          */
944         if (td->o.time_based || td->o.loops)
945                 td->nr_done_files = 0;
946
947         /*
948          * Set the same seed to get repeatable runs
949          */
950         td_fill_rand_seeds(td);
951 }
952
953 void reset_all_stats(struct thread_data *td)
954 {
955         struct timeval tv;
956         int i;
957
958         reset_io_counters(td);
959
960         for (i = 0; i < 2; i++) {
961                 td->io_bytes[i] = 0;
962                 td->io_blocks[i] = 0;
963                 td->io_issues[i] = 0;
964                 td->ts.total_io_u[i] = 0;
965         }
966         
967         fio_gettime(&tv, NULL);
968         memcpy(&td->epoch, &tv, sizeof(tv));
969         memcpy(&td->start, &tv, sizeof(tv));
970 }
971
972 static void clear_io_state(struct thread_data *td)
973 {
974         struct fio_file *f;
975         unsigned int i;
976
977         reset_io_counters(td);
978
979         close_files(td);
980         for_each_file(td, f, i)
981                 fio_file_clear_done(f);
982 }
983
984 static int exec_string(const char *string)
985 {
986         int ret, newlen = strlen(string) + 1 + 8;
987         char *str;
988
989         str = malloc(newlen);
990         sprintf(str, "sh -c %s", string);
991
992         ret = system(str);
993         if (ret == -1)
994                 log_err("fio: exec of cmd <%s> failed\n", str);
995
996         free(str);
997         return ret;
998 }
999
1000 /*
1001  * Entry point for the thread based jobs. The process based jobs end up
1002  * here as well, after a little setup.
1003  */
1004 static void *thread_main(void *data)
1005 {
1006         unsigned long long runtime[2], elapsed;
1007         struct thread_data *td = data;
1008         pthread_condattr_t attr;
1009         int clear_state;
1010
1011         if (!td->o.use_thread)
1012                 setsid();
1013
1014         td->pid = getpid();
1015
1016         dprint(FD_PROCESS, "jobs pid=%d started\n", (int) td->pid);
1017
1018         INIT_FLIST_HEAD(&td->io_u_freelist);
1019         INIT_FLIST_HEAD(&td->io_u_busylist);
1020         INIT_FLIST_HEAD(&td->io_u_requeues);
1021         INIT_FLIST_HEAD(&td->io_log_list);
1022         INIT_FLIST_HEAD(&td->io_hist_list);
1023         INIT_FLIST_HEAD(&td->verify_list);
1024         pthread_mutex_init(&td->io_u_lock, NULL);
1025         td->io_hist_tree = RB_ROOT;
1026
1027         pthread_condattr_init(&attr);
1028         pthread_cond_init(&td->verify_cond, &attr);
1029         pthread_cond_init(&td->free_cond, &attr);
1030
1031         td_set_runstate(td, TD_INITIALIZED);
1032         dprint(FD_MUTEX, "up startup_mutex\n");
1033         fio_mutex_up(startup_mutex);
1034         dprint(FD_MUTEX, "wait on td->mutex\n");
1035         fio_mutex_down(td->mutex);
1036         dprint(FD_MUTEX, "done waiting on td->mutex\n");
1037
1038         /*
1039          * the ->mutex mutex is now no longer used, close it to avoid
1040          * eating a file descriptor
1041          */
1042         fio_mutex_remove(td->mutex);
1043
1044         /*
1045          * May alter parameters that init_io_u() will use, so we need to
1046          * do this first.
1047          */
1048         if (init_iolog(td))
1049                 goto err;
1050
1051         if (init_io_u(td))
1052                 goto err;
1053
1054         if (td->o.verify_async && verify_async_init(td))
1055                 goto err;
1056
1057         if (td->o.cpumask_set && fio_setaffinity(td->pid, td->o.cpumask) == -1) {
1058                 td_verror(td, errno, "cpu_set_affinity");
1059                 goto err;
1060         }
1061
1062         /*
1063          * If we have a gettimeofday() thread, make sure we exclude that
1064          * thread from this job
1065          */
1066         if (td->o.gtod_cpu) {
1067                 fio_cpu_clear(&td->o.cpumask, td->o.gtod_cpu);
1068                 if (fio_setaffinity(td->pid, td->o.cpumask) == -1) {
1069                         td_verror(td, errno, "cpu_set_affinity");
1070                         goto err;
1071                 }
1072         }
1073
1074         if (td->ioprio_set) {
1075                 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, td->ioprio) == -1) {
1076                         td_verror(td, errno, "ioprio_set");
1077                         goto err;
1078                 }
1079         }
1080
1081         if (td->o.cgroup_weight && cgroup_setup(td, cgroup_list, &cgroup_mnt))
1082                 goto err;
1083
1084         if (nice(td->o.nice) == -1) {
1085                 td_verror(td, errno, "nice");
1086                 goto err;
1087         }
1088
1089         if (td->o.ioscheduler && switch_ioscheduler(td))
1090                 goto err;
1091
1092         if (!td->o.create_serialize && setup_files(td))
1093                 goto err;
1094
1095         if (td_io_init(td))
1096                 goto err;
1097
1098         if (init_random_map(td))
1099                 goto err;
1100
1101         if (td->o.exec_prerun) {
1102                 if (exec_string(td->o.exec_prerun))
1103                         goto err;
1104         }
1105
1106         if (td->o.pre_read) {
1107                 if (pre_read_files(td) < 0)
1108                         goto err;
1109         }
1110
1111         fio_gettime(&td->epoch, NULL);
1112         getrusage(RUSAGE_SELF, &td->ts.ru_start);
1113
1114         runtime[0] = runtime[1] = 0;
1115         clear_state = 0;
1116         while (keep_running(td)) {
1117                 fio_gettime(&td->start, NULL);
1118                 memcpy(&td->ts.stat_sample_time[0], &td->start,
1119                                 sizeof(td->start));
1120                 memcpy(&td->ts.stat_sample_time[1], &td->start,
1121                                 sizeof(td->start));
1122                 memcpy(&td->tv_cache, &td->start, sizeof(td->start));
1123
1124                 if (td->o.ratemin[0] || td->o.ratemin[1])
1125                         memcpy(&td->lastrate, &td->ts.stat_sample_time,
1126                                                         sizeof(td->lastrate));
1127
1128                 if (clear_state)
1129                         clear_io_state(td);
1130
1131                 prune_io_piece_log(td);
1132
1133                 do_io(td);
1134
1135                 clear_state = 1;
1136
1137                 if (td_read(td) && td->io_bytes[DDIR_READ]) {
1138                         elapsed = utime_since_now(&td->start);
1139                         runtime[DDIR_READ] += elapsed;
1140                 }
1141                 if (td_write(td) && td->io_bytes[DDIR_WRITE]) {
1142                         elapsed = utime_since_now(&td->start);
1143                         runtime[DDIR_WRITE] += elapsed;
1144                 }
1145
1146                 if (td->error || td->terminate)
1147                         break;
1148
1149                 if (!td->o.do_verify ||
1150                     td->o.verify == VERIFY_NONE ||
1151                     (td->io_ops->flags & FIO_UNIDIR))
1152                         continue;
1153
1154                 clear_io_state(td);
1155
1156                 fio_gettime(&td->start, NULL);
1157
1158                 do_verify(td);
1159
1160                 runtime[DDIR_READ] += utime_since_now(&td->start);
1161
1162                 if (td->error || td->terminate)
1163                         break;
1164         }
1165
1166         update_rusage_stat(td);
1167         td->ts.runtime[0] = (runtime[0] + 999) / 1000;
1168         td->ts.runtime[1] = (runtime[1] + 999) / 1000;
1169         td->ts.total_run_time = mtime_since_now(&td->epoch);
1170         td->ts.io_bytes[0] = td->io_bytes[0];
1171         td->ts.io_bytes[1] = td->io_bytes[1];
1172
1173         fio_mutex_down(writeout_mutex);
1174         if (td->ts.bw_log) {
1175                 if (td->o.bw_log_file) {
1176                         finish_log_named(td, td->ts.bw_log,
1177                                                 td->o.bw_log_file, "bw");
1178                 } else
1179                         finish_log(td, td->ts.bw_log, "bw");
1180         }
1181         if (td->ts.slat_log) {
1182                 if (td->o.lat_log_file) {
1183                         finish_log_named(td, td->ts.slat_log,
1184                                                 td->o.lat_log_file, "slat");
1185                 } else
1186                         finish_log(td, td->ts.slat_log, "slat");
1187         }
1188         if (td->ts.clat_log) {
1189                 if (td->o.lat_log_file) {
1190                         finish_log_named(td, td->ts.clat_log,
1191                                                 td->o.lat_log_file, "clat");
1192                 } else
1193                         finish_log(td, td->ts.clat_log, "clat");
1194         }
1195         fio_mutex_up(writeout_mutex);
1196         if (td->o.exec_postrun)
1197                 exec_string(td->o.exec_postrun);
1198
1199         if (exitall_on_terminate)
1200                 terminate_threads(td->groupid);
1201
1202 err:
1203         if (td->error)
1204                 printf("fio: pid=%d, err=%d/%s\n", (int) td->pid, td->error,
1205                                                         td->verror);
1206
1207         if (td->o.verify_async)
1208                 verify_async_exit(td);
1209
1210         close_and_free_files(td);
1211         close_ioengine(td);
1212         cleanup_io_u(td);
1213         cgroup_shutdown(td, &cgroup_mnt);
1214
1215         if (td->o.cpumask_set) {
1216                 int ret = fio_cpuset_exit(&td->o.cpumask);
1217
1218                 td_verror(td, ret, "fio_cpuset_exit");
1219         }
1220
1221         /*
1222          * do this very late, it will log file closing as well
1223          */
1224         if (td->o.write_iolog_file)
1225                 write_iolog_close(td);
1226
1227         options_mem_free(td);
1228         td_set_runstate(td, TD_EXITED);
1229         return (void *) (unsigned long) td->error;
1230 }
1231
1232 /*
1233  * We cannot pass the td data into a forked process, so attach the td and
1234  * pass it to the thread worker.
1235  */
1236 static int fork_main(int shmid, int offset)
1237 {
1238         struct thread_data *td;
1239         void *data, *ret;
1240
1241         data = shmat(shmid, NULL, 0);
1242         if (data == (void *) -1) {
1243                 int __err = errno;
1244
1245                 perror("shmat");
1246                 return __err;
1247         }
1248
1249         td = data + offset * sizeof(struct thread_data);
1250         ret = thread_main(td);
1251         shmdt(data);
1252         return (int) (unsigned long) ret;
1253 }
1254
1255 /*
1256  * Run over the job map and reap the threads that have exited, if any.
1257  */
1258 static void reap_threads(int *nr_running, int *t_rate, int *m_rate)
1259 {
1260         struct thread_data *td;
1261         int i, cputhreads, realthreads, pending, status, ret;
1262
1263         /*
1264          * reap exited threads (TD_EXITED -> TD_REAPED)
1265          */
1266         realthreads = pending = cputhreads = 0;
1267         for_each_td(td, i) {
1268                 int flags = 0;
1269
1270                 /*
1271                  * ->io_ops is NULL for a thread that has closed its
1272                  * io engine
1273                  */
1274                 if (td->io_ops && !strcmp(td->io_ops->name, "cpuio"))
1275                         cputhreads++;
1276                 else
1277                         realthreads++;
1278
1279                 if (!td->pid) {
1280                         pending++;
1281                         continue;
1282                 }
1283                 if (td->runstate == TD_REAPED)
1284                         continue;
1285                 if (td->o.use_thread) {
1286                         if (td->runstate == TD_EXITED) {
1287                                 td_set_runstate(td, TD_REAPED);
1288                                 goto reaped;
1289                         }
1290                         continue;
1291                 }
1292
1293                 flags = WNOHANG;
1294                 if (td->runstate == TD_EXITED)
1295                         flags = 0;
1296
1297                 /*
1298                  * check if someone quit or got killed in an unusual way
1299                  */
1300                 ret = waitpid(td->pid, &status, flags);
1301                 if (ret < 0) {
1302                         if (errno == ECHILD) {
1303                                 log_err("fio: pid=%d disappeared %d\n",
1304                                                 (int) td->pid, td->runstate);
1305                                 td_set_runstate(td, TD_REAPED);
1306                                 goto reaped;
1307                         }
1308                         perror("waitpid");
1309                 } else if (ret == td->pid) {
1310                         if (WIFSIGNALED(status)) {
1311                                 int sig = WTERMSIG(status);
1312
1313                                 if (sig != SIGQUIT)
1314                                         log_err("fio: pid=%d, got signal=%d\n",
1315                                                         (int) td->pid, sig);
1316                                 td_set_runstate(td, TD_REAPED);
1317                                 goto reaped;
1318                         }
1319                         if (WIFEXITED(status)) {
1320                                 if (WEXITSTATUS(status) && !td->error)
1321                                         td->error = WEXITSTATUS(status);
1322
1323                                 td_set_runstate(td, TD_REAPED);
1324                                 goto reaped;
1325                         }
1326                 }
1327
1328                 /*
1329                  * thread is not dead, continue
1330                  */
1331                 pending++;
1332                 continue;
1333 reaped:
1334                 (*nr_running)--;
1335                 (*m_rate) -= (td->o.ratemin[0] + td->o.ratemin[1]);
1336                 (*t_rate) -= (td->o.rate[0] + td->o.rate[1]);
1337                 if (!td->pid)
1338                         pending--;
1339
1340                 if (td->error)
1341                         exit_value++;
1342
1343                 done_secs += mtime_since_now(&td->epoch) / 1000;
1344         }
1345
1346         if (*nr_running == cputhreads && !pending && realthreads)
1347                 terminate_threads(TERMINATE_ALL);
1348 }
1349
1350 static void *gtod_thread_main(void *data)
1351 {
1352         fio_mutex_up(startup_mutex);
1353
1354         /*
1355          * As long as we have jobs around, update the clock. It would be nice
1356          * to have some way of NOT hammering that CPU with gettimeofday(),
1357          * but I'm not sure what to use outside of a simple CPU nop to relax
1358          * it - we don't want to lose precision.
1359          */
1360         while (threads) {
1361                 fio_gtod_update();
1362                 nop;
1363         }
1364
1365         return NULL;
1366 }
1367
1368 static int fio_start_gtod_thread(void)
1369 {
1370         int ret;
1371
1372         ret = pthread_create(&gtod_thread, NULL, gtod_thread_main, NULL);
1373         if (ret) {
1374                 log_err("Can't create gtod thread: %s\n", strerror(ret));
1375                 return 1;
1376         }
1377
1378         ret = pthread_detach(gtod_thread);
1379         if (ret) {
1380                 log_err("Can't detatch gtod thread: %s\n", strerror(ret));
1381                 return 1;
1382         }
1383
1384         dprint(FD_MUTEX, "wait on startup_mutex\n");
1385         fio_mutex_down(startup_mutex);
1386         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1387         return 0;
1388 }
1389
1390 /*
1391  * Main function for kicking off and reaping jobs, as needed.
1392  */
1393 static void run_threads(void)
1394 {
1395         struct thread_data *td;
1396         unsigned long spent;
1397         int i, todo, nr_running, m_rate, t_rate, nr_started;
1398
1399         if (fio_pin_memory())
1400                 return;
1401
1402         if (fio_gtod_offload && fio_start_gtod_thread())
1403                 return;
1404
1405         if (!terse_output) {
1406                 printf("Starting ");
1407                 if (nr_thread)
1408                         printf("%d thread%s", nr_thread,
1409                                                 nr_thread > 1 ? "s" : "");
1410                 if (nr_process) {
1411                         if (nr_thread)
1412                                 printf(" and ");
1413                         printf("%d process%s", nr_process,
1414                                                 nr_process > 1 ? "es" : "");
1415                 }
1416                 printf("\n");
1417                 fflush(stdout);
1418         }
1419
1420         set_sig_handlers();
1421
1422         todo = thread_number;
1423         nr_running = 0;
1424         nr_started = 0;
1425         m_rate = t_rate = 0;
1426
1427         for_each_td(td, i) {
1428                 print_status_init(td->thread_number - 1);
1429
1430                 if (!td->o.create_serialize) {
1431                         init_disk_util(td);
1432                         continue;
1433                 }
1434
1435                 /*
1436                  * do file setup here so it happens sequentially,
1437                  * we don't want X number of threads getting their
1438                  * client data interspersed on disk
1439                  */
1440                 if (setup_files(td)) {
1441                         exit_value++;
1442                         if (td->error)
1443                                 log_err("fio: pid=%d, err=%d/%s\n",
1444                                         (int) td->pid, td->error, td->verror);
1445                         td_set_runstate(td, TD_REAPED);
1446                         todo--;
1447                 } else {
1448                         struct fio_file *f;
1449                         unsigned int i;
1450
1451                         /*
1452                          * for sharing to work, each job must always open
1453                          * its own files. so close them, if we opened them
1454                          * for creation
1455                          */
1456                         for_each_file(td, f, i) {
1457                                 if (fio_file_open(f))
1458                                         td_io_close_file(td, f);
1459                         }
1460                 }
1461
1462                 init_disk_util(td);
1463         }
1464
1465         set_genesis_time();
1466
1467         while (todo) {
1468                 struct thread_data *map[MAX_JOBS];
1469                 struct timeval this_start;
1470                 int this_jobs = 0, left;
1471
1472                 /*
1473                  * create threads (TD_NOT_CREATED -> TD_CREATED)
1474                  */
1475                 for_each_td(td, i) {
1476                         if (td->runstate != TD_NOT_CREATED)
1477                                 continue;
1478
1479                         /*
1480                          * never got a chance to start, killed by other
1481                          * thread for some reason
1482                          */
1483                         if (td->terminate) {
1484                                 todo--;
1485                                 continue;
1486                         }
1487
1488                         if (td->o.start_delay) {
1489                                 spent = mtime_since_genesis();
1490
1491                                 if (td->o.start_delay * 1000 > spent)
1492                                         continue;
1493                         }
1494
1495                         if (td->o.stonewall && (nr_started || nr_running)) {
1496                                 dprint(FD_PROCESS, "%s: stonewall wait\n",
1497                                                         td->o.name);
1498                                 break;
1499                         }
1500
1501                         /*
1502                          * Set state to created. Thread will transition
1503                          * to TD_INITIALIZED when it's done setting up.
1504                          */
1505                         td_set_runstate(td, TD_CREATED);
1506                         map[this_jobs++] = td;
1507                         nr_started++;
1508
1509                         if (td->o.use_thread) {
1510                                 int ret;
1511
1512                                 dprint(FD_PROCESS, "will pthread_create\n");
1513                                 ret = pthread_create(&td->thread, NULL,
1514                                                         thread_main, td);
1515                                 if (ret) {
1516                                         log_err("pthread_create: %s\n",
1517                                                         strerror(ret));
1518                                         nr_started--;
1519                                         break;
1520                                 }
1521                                 ret = pthread_detach(td->thread);
1522                                 if (ret)
1523                                         log_err("pthread_detach: %s",
1524                                                         strerror(ret));
1525                         } else {
1526                                 pid_t pid;
1527                                 dprint(FD_PROCESS, "will fork\n");
1528                                 pid = fork();
1529                                 if (!pid) {
1530                                         int ret = fork_main(shm_id, i);
1531
1532                                         _exit(ret);
1533                                 } else if (i == fio_debug_jobno)
1534                                         *fio_debug_jobp = pid;
1535                         }
1536                         dprint(FD_MUTEX, "wait on startup_mutex\n");
1537                         if (fio_mutex_down_timeout(startup_mutex, 10)) {
1538                                 log_err("fio: job startup hung? exiting.\n");
1539                                 terminate_threads(TERMINATE_ALL);
1540                                 fio_abort = 1;
1541                                 nr_started--;
1542                                 break;
1543                         }
1544                         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1545                 }
1546
1547                 /*
1548                  * Wait for the started threads to transition to
1549                  * TD_INITIALIZED.
1550                  */
1551                 fio_gettime(&this_start, NULL);
1552                 left = this_jobs;
1553                 while (left && !fio_abort) {
1554                         if (mtime_since_now(&this_start) > JOB_START_TIMEOUT)
1555                                 break;
1556
1557                         usleep(100000);
1558
1559                         for (i = 0; i < this_jobs; i++) {
1560                                 td = map[i];
1561                                 if (!td)
1562                                         continue;
1563                                 if (td->runstate == TD_INITIALIZED) {
1564                                         map[i] = NULL;
1565                                         left--;
1566                                 } else if (td->runstate >= TD_EXITED) {
1567                                         map[i] = NULL;
1568                                         left--;
1569                                         todo--;
1570                                         nr_running++; /* work-around... */
1571                                 }
1572                         }
1573                 }
1574
1575                 if (left) {
1576                         log_err("fio: %d jobs failed to start\n", left);
1577                         for (i = 0; i < this_jobs; i++) {
1578                                 td = map[i];
1579                                 if (!td)
1580                                         continue;
1581                                 kill(td->pid, SIGTERM);
1582                         }
1583                         break;
1584                 }
1585
1586                 /*
1587                  * start created threads (TD_INITIALIZED -> TD_RUNNING).
1588                  */
1589                 for_each_td(td, i) {
1590                         if (td->runstate != TD_INITIALIZED)
1591                                 continue;
1592
1593                         if (in_ramp_time(td))
1594                                 td_set_runstate(td, TD_RAMP);
1595                         else
1596                                 td_set_runstate(td, TD_RUNNING);
1597                         nr_running++;
1598                         nr_started--;
1599                         m_rate += td->o.ratemin[0] + td->o.ratemin[1];
1600                         t_rate += td->o.rate[0] + td->o.rate[1];
1601                         todo--;
1602                         fio_mutex_up(td->mutex);
1603                 }
1604
1605                 reap_threads(&nr_running, &t_rate, &m_rate);
1606
1607                 if (todo)
1608                         usleep(100000);
1609         }
1610
1611         while (nr_running) {
1612                 reap_threads(&nr_running, &t_rate, &m_rate);
1613                 usleep(10000);
1614         }
1615
1616         update_io_ticks();
1617         fio_unpin_memory();
1618 }
1619
1620 int main(int argc, char *argv[])
1621 {
1622         long ps;
1623
1624         sinit();
1625
1626         /*
1627          * We need locale for number printing, if it isn't set then just
1628          * go with the US format.
1629          */
1630         if (!getenv("LC_NUMERIC"))
1631                 setlocale(LC_NUMERIC, "en_US");
1632
1633         ps = sysconf(_SC_PAGESIZE);
1634         if (ps < 0) {
1635                 log_err("Failed to get page size\n");
1636                 return 1;
1637         }
1638
1639         page_size = ps;
1640         page_mask = ps - 1;
1641
1642         fio_keywords_init();
1643
1644         if (parse_options(argc, argv))
1645                 return 1;
1646
1647         if (!thread_number)
1648                 return 0;
1649
1650         if (write_bw_log) {
1651                 setup_log(&agg_io_log[DDIR_READ]);
1652                 setup_log(&agg_io_log[DDIR_WRITE]);
1653         }
1654
1655         startup_mutex = fio_mutex_init(0);
1656         writeout_mutex = fio_mutex_init(1);
1657
1658         set_genesis_time();
1659
1660         status_timer_arm();
1661
1662         cgroup_list = smalloc(sizeof(*cgroup_list));
1663         INIT_FLIST_HEAD(cgroup_list);
1664
1665         run_threads();
1666
1667         if (!fio_abort) {
1668                 show_run_stats();
1669                 if (write_bw_log) {
1670                         __finish_log(agg_io_log[DDIR_READ], "agg-read_bw.log");
1671                         __finish_log(agg_io_log[DDIR_WRITE],
1672                                         "agg-write_bw.log");
1673                 }
1674         }
1675
1676         cgroup_kill(cgroup_list);
1677         sfree(cgroup_list);
1678         if (cgroup_mnt)
1679                 sfree(cgroup_mnt);
1680
1681         fio_mutex_remove(startup_mutex);
1682         fio_mutex_remove(writeout_mutex);
1683         return exit_value;
1684 }