Fio 1.41.6
[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 #include "profile.h"
44 #include "lib/rand.h"
45
46 unsigned long page_mask;
47 unsigned long page_size;
48
49 #define PAGE_ALIGN(buf) \
50         (char *) (((unsigned long) (buf) + page_mask) & ~page_mask)
51
52 int groupid = 0;
53 int thread_number = 0;
54 int nr_process = 0;
55 int nr_thread = 0;
56 int shm_id = 0;
57 int temp_stall_ts;
58 unsigned long done_secs = 0;
59
60 static struct fio_mutex *startup_mutex;
61 static struct fio_mutex *writeout_mutex;
62 static volatile int fio_abort;
63 static int exit_value;
64 static struct itimerval itimer;
65 static pthread_t gtod_thread;
66 static struct flist_head *cgroup_list;
67 static char *cgroup_mnt;
68
69 struct io_log *agg_io_log[2];
70
71 #define TERMINATE_ALL           (-1)
72 #define JOB_START_TIMEOUT       (5 * 1000)
73
74 void td_set_runstate(struct thread_data *td, int runstate)
75 {
76         if (td->runstate == runstate)
77                 return;
78
79         dprint(FD_PROCESS, "pid=%d: runstate %d -> %d\n", (int) td->pid,
80                                                 td->runstate, runstate);
81         td->runstate = runstate;
82 }
83
84 static void terminate_threads(int group_id)
85 {
86         struct thread_data *td;
87         int i;
88
89         dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
90
91         for_each_td(td, i) {
92                 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
93                         dprint(FD_PROCESS, "setting terminate on %s/%d\n",
94                                                 td->o.name, (int) td->pid);
95                         td->terminate = 1;
96                         td->o.start_delay = 0;
97
98                         /*
99                          * if the thread is running, just let it exit
100                          */
101                         if (td->runstate < TD_RUNNING)
102                                 kill(td->pid, SIGQUIT);
103                         else {
104                                 struct ioengine_ops *ops = td->io_ops;
105
106                                 if (ops && (ops->flags & FIO_SIGQUIT))
107                                         kill(td->pid, SIGQUIT);
108                         }
109                 }
110         }
111 }
112
113 static void status_timer_arm(void)
114 {
115         itimer.it_value.tv_sec = 0;
116         itimer.it_value.tv_usec = DISK_UTIL_MSEC * 1000;
117         setitimer(ITIMER_REAL, &itimer, NULL);
118 }
119
120 static void sig_alrm(int fio_unused sig)
121 {
122         if (threads) {
123                 update_io_ticks();
124                 print_thread_status();
125                 status_timer_arm();
126         }
127 }
128
129 /*
130  * Happens on thread runs with ctrl-c, ignore our own SIGQUIT
131  */
132 static void sig_quit(int sig)
133 {
134 }
135
136 static void sig_int(int sig)
137 {
138         if (threads) {
139                 log_info("\nfio: terminating on signal %d\n", sig);
140                 fflush(stdout);
141                 terminate_threads(TERMINATE_ALL);
142         }
143 }
144
145 static void set_sig_handlers(void)
146 {
147         struct sigaction act;
148
149         memset(&act, 0, sizeof(act));
150         act.sa_handler = sig_alrm;
151         act.sa_flags = SA_RESTART;
152         sigaction(SIGALRM, &act, NULL);
153
154         memset(&act, 0, sizeof(act));
155         act.sa_handler = sig_int;
156         act.sa_flags = SA_RESTART;
157         sigaction(SIGINT, &act, NULL);
158
159         memset(&act, 0, sizeof(act));
160         act.sa_handler = sig_quit;
161         act.sa_flags = SA_RESTART;
162         sigaction(SIGQUIT, &act, NULL);
163 }
164
165 /*
166  * Check if we are above the minimum rate given.
167  */
168 static int __check_min_rate(struct thread_data *td, struct timeval *now,
169                             enum td_ddir ddir)
170 {
171         unsigned long long bytes = 0;
172         unsigned long iops = 0;
173         unsigned long spent;
174         unsigned long rate;
175         unsigned int ratemin = 0;
176         unsigned int rate_iops = 0;
177         unsigned int rate_iops_min = 0;
178
179         if (!td->o.ratemin[ddir] && !td->o.rate_iops_min[ddir])
180                 return 0;
181
182         /*
183          * allow a 2 second settle period in the beginning
184          */
185         if (mtime_since(&td->start, now) < 2000)
186                 return 0;
187
188         iops += td->io_blocks[ddir];
189         bytes += td->this_io_bytes[ddir];
190         ratemin += td->o.ratemin[ddir];
191         rate_iops += td->o.rate_iops[ddir];
192         rate_iops_min += td->o.rate_iops_min[ddir];
193
194         /*
195          * if rate blocks is set, sample is running
196          */
197         if (td->rate_bytes[ddir] || td->rate_blocks[ddir]) {
198                 spent = mtime_since(&td->lastrate[ddir], now);
199                 if (spent < td->o.ratecycle)
200                         return 0;
201
202                 if (td->o.rate[ddir]) {
203                         /*
204                          * check bandwidth specified rate
205                          */
206                         if (bytes < td->rate_bytes[ddir]) {
207                                 log_err("%s: min rate %u not met\n", td->o.name,
208                                                                 ratemin);
209                                 return 1;
210                         } else {
211                                 rate = ((bytes - td->rate_bytes[ddir]) * 1000) / spent;
212                                 if (rate < ratemin ||
213                                     bytes < td->rate_bytes[ddir]) {
214                                         log_err("%s: min rate %u not met, got"
215                                                 " %luKB/sec\n", td->o.name,
216                                                         ratemin, rate);
217                                         return 1;
218                                 }
219                         }
220                 } else {
221                         /*
222                          * checks iops specified rate
223                          */
224                         if (iops < rate_iops) {
225                                 log_err("%s: min iops rate %u not met\n",
226                                                 td->o.name, rate_iops);
227                                 return 1;
228                         } else {
229                                 rate = ((iops - td->rate_blocks[ddir]) * 1000) / spent;
230                                 if (rate < rate_iops_min ||
231                                     iops < td->rate_blocks[ddir]) {
232                                         log_err("%s: min iops rate %u not met,"
233                                                 " got %lu\n", td->o.name,
234                                                         rate_iops_min, rate);
235                                 }
236                         }
237                 }
238         }
239
240         td->rate_bytes[ddir] = bytes;
241         td->rate_blocks[ddir] = iops;
242         memcpy(&td->lastrate[ddir], now, sizeof(*now));
243         return 0;
244 }
245
246 static int check_min_rate(struct thread_data *td, struct timeval *now,
247                           unsigned long *bytes_done)
248 {
249         int ret = 0;
250
251         if (bytes_done[0])
252                 ret |= __check_min_rate(td, now, 0);
253         if (bytes_done[1])
254                 ret |= __check_min_rate(td, now, 1);
255
256         return ret;
257 }
258
259 static inline int runtime_exceeded(struct thread_data *td, struct timeval *t)
260 {
261         if (!td->o.timeout)
262                 return 0;
263         if (mtime_since(&td->epoch, t) >= td->o.timeout * 1000)
264                 return 1;
265
266         return 0;
267 }
268
269 /*
270  * When job exits, we can cancel the in-flight IO if we are using async
271  * io. Attempt to do so.
272  */
273 static void cleanup_pending_aio(struct thread_data *td)
274 {
275         struct flist_head *entry, *n;
276         struct io_u *io_u;
277         int r;
278
279         /*
280          * get immediately available events, if any
281          */
282         r = io_u_queued_complete(td, 0, NULL);
283         if (r < 0)
284                 return;
285
286         /*
287          * now cancel remaining active events
288          */
289         if (td->io_ops->cancel) {
290                 flist_for_each_safe(entry, n, &td->io_u_busylist) {
291                         io_u = flist_entry(entry, struct io_u, list);
292
293                         /*
294                          * if the io_u isn't in flight, then that generally
295                          * means someone leaked an io_u. complain but fix
296                          * it up, so we don't stall here.
297                          */
298                         if ((io_u->flags & IO_U_F_FLIGHT) == 0) {
299                                 log_err("fio: non-busy IO on busy list\n");
300                                 put_io_u(td, io_u);
301                         } else {
302                                 r = td->io_ops->cancel(td, io_u);
303                                 if (!r)
304                                         put_io_u(td, io_u);
305                         }
306                 }
307         }
308
309         if (td->cur_depth)
310                 r = io_u_queued_complete(td, td->cur_depth, NULL);
311 }
312
313 /*
314  * Helper to handle the final sync of a file. Works just like the normal
315  * io path, just does everything sync.
316  */
317 static int fio_io_sync(struct thread_data *td, struct fio_file *f)
318 {
319         struct io_u *io_u = __get_io_u(td);
320         int ret;
321
322         if (!io_u)
323                 return 1;
324
325         io_u->ddir = DDIR_SYNC;
326         io_u->file = f;
327
328         if (td_io_prep(td, io_u)) {
329                 put_io_u(td, io_u);
330                 return 1;
331         }
332
333 requeue:
334         ret = td_io_queue(td, io_u);
335         if (ret < 0) {
336                 td_verror(td, io_u->error, "td_io_queue");
337                 put_io_u(td, io_u);
338                 return 1;
339         } else if (ret == FIO_Q_QUEUED) {
340                 if (io_u_queued_complete(td, 1, NULL) < 0)
341                         return 1;
342         } else if (ret == FIO_Q_COMPLETED) {
343                 if (io_u->error) {
344                         td_verror(td, io_u->error, "td_io_queue");
345                         return 1;
346                 }
347
348                 if (io_u_sync_complete(td, io_u, NULL) < 0)
349                         return 1;
350         } else if (ret == FIO_Q_BUSY) {
351                 if (td_io_commit(td))
352                         return 1;
353                 goto requeue;
354         }
355
356         return 0;
357 }
358
359 static inline void update_tv_cache(struct thread_data *td)
360 {
361         if ((++td->tv_cache_nr & td->tv_cache_mask) == td->tv_cache_mask)
362                 fio_gettime(&td->tv_cache, NULL);
363 }
364
365 static int break_on_this_error(struct thread_data *td, int *retptr)
366 {
367         int ret = *retptr;
368
369         if (ret < 0 || td->error) {
370                 int err;
371
372                 if (!td->o.continue_on_error)
373                         return 1;
374
375                 if (ret < 0)
376                         err = -ret;
377                 else
378                         err = td->error;
379
380                 if (td_non_fatal_error(err)) {
381                         /*
382                          * Continue with the I/Os in case of
383                          * a non fatal error.
384                          */
385                         update_error_count(td, err);
386                         td_clear_error(td);
387                         *retptr = 0;
388                         return 0;
389                 } else if (td->o.fill_device && err == ENOSPC) {
390                         /*
391                          * We expect to hit this error if
392                          * fill_device option is set.
393                          */
394                         td_clear_error(td);
395                         td->terminate = 1;
396                         return 1;
397                 } else {
398                         /*
399                          * Stop the I/O in case of a fatal
400                          * error.
401                          */
402                         update_error_count(td, err);
403                         return 1;
404                 }
405         }
406
407         return 0;
408 }
409
410 /*
411  * The main verify engine. Runs over the writes we previously submitted,
412  * reads the blocks back in, and checks the crc/md5 of the data.
413  */
414 static void do_verify(struct thread_data *td)
415 {
416         struct fio_file *f;
417         struct io_u *io_u;
418         int ret, min_events;
419         unsigned int i;
420
421         dprint(FD_VERIFY, "starting loop\n");
422
423         /*
424          * sync io first and invalidate cache, to make sure we really
425          * read from disk.
426          */
427         for_each_file(td, f, i) {
428                 if (!fio_file_open(f))
429                         continue;
430                 if (fio_io_sync(td, f))
431                         break;
432                 if (file_invalidate_cache(td, f))
433                         break;
434         }
435
436         if (td->error)
437                 return;
438
439         td_set_runstate(td, TD_VERIFYING);
440
441         io_u = NULL;
442         while (!td->terminate) {
443                 int ret2, full;
444
445                 update_tv_cache(td);
446
447                 if (runtime_exceeded(td, &td->tv_cache)) {
448                         td->terminate = 1;
449                         break;
450                 }
451
452                 io_u = __get_io_u(td);
453                 if (!io_u)
454                         break;
455
456                 if (get_next_verify(td, io_u)) {
457                         put_io_u(td, io_u);
458                         break;
459                 }
460
461                 if (td_io_prep(td, io_u)) {
462                         put_io_u(td, io_u);
463                         break;
464                 }
465
466                 if (td->o.verify_async)
467                         io_u->end_io = verify_io_u_async;
468                 else
469                         io_u->end_io = verify_io_u;
470
471                 ret = td_io_queue(td, io_u);
472                 switch (ret) {
473                 case FIO_Q_COMPLETED:
474                         if (io_u->error) {
475                                 ret = -io_u->error;
476                                 clear_io_u(td, io_u);
477                         } else if (io_u->resid) {
478                                 int bytes = io_u->xfer_buflen - io_u->resid;
479                                 struct fio_file *f = io_u->file;
480
481                                 /*
482                                  * zero read, fail
483                                  */
484                                 if (!bytes) {
485                                         td_verror(td, EIO, "full resid");
486                                         put_io_u(td, io_u);
487                                         break;
488                                 }
489
490                                 io_u->xfer_buflen = io_u->resid;
491                                 io_u->xfer_buf += bytes;
492                                 io_u->offset += bytes;
493
494                                 td->ts.short_io_u[io_u->ddir]++;
495
496                                 if (io_u->offset == f->real_file_size)
497                                         goto sync_done;
498
499                                 requeue_io_u(td, &io_u);
500                         } else {
501 sync_done:
502                                 ret = io_u_sync_complete(td, io_u, NULL);
503                                 if (ret < 0)
504                                         break;
505                         }
506                         continue;
507                 case FIO_Q_QUEUED:
508                         break;
509                 case FIO_Q_BUSY:
510                         requeue_io_u(td, &io_u);
511                         ret2 = td_io_commit(td);
512                         if (ret2 < 0)
513                                 ret = ret2;
514                         break;
515                 default:
516                         assert(ret < 0);
517                         td_verror(td, -ret, "td_io_queue");
518                         break;
519                 }
520
521                 if (break_on_this_error(td, &ret))
522                         break;
523
524                 /*
525                  * if we can queue more, do so. but check if there are
526                  * completed io_u's first.
527                  */
528                 full = queue_full(td) || ret == FIO_Q_BUSY;
529                 if (full || !td->o.iodepth_batch_complete) {
530                         min_events = min(td->o.iodepth_batch_complete,
531                                          td->cur_depth);
532                         if (full && !min_events)
533                                 min_events = 1;
534
535                         do {
536                                 /*
537                                  * Reap required number of io units, if any,
538                                  * and do the verification on them through
539                                  * the callback handler
540                                  */
541                                 if (io_u_queued_complete(td, min_events, NULL) < 0) {
542                                         ret = -1;
543                                         break;
544                                 }
545                         } while (full && (td->cur_depth > td->o.iodepth_low));
546                 }
547                 if (ret < 0)
548                         break;
549         }
550
551         if (!td->error) {
552                 min_events = td->cur_depth;
553
554                 if (min_events)
555                         ret = io_u_queued_complete(td, min_events, NULL);
556         } else
557                 cleanup_pending_aio(td);
558
559         td_set_runstate(td, TD_RUNNING);
560
561         dprint(FD_VERIFY, "exiting loop\n");
562 }
563
564 /*
565  * Main IO worker function. It retrieves io_u's to process and queues
566  * and reaps them, checking for rate and errors along the way.
567  */
568 static void do_io(struct thread_data *td)
569 {
570         unsigned int i;
571         int ret = 0;
572
573         if (in_ramp_time(td))
574                 td_set_runstate(td, TD_RAMP);
575         else
576                 td_set_runstate(td, TD_RUNNING);
577
578         while ( (td->o.read_iolog_file && !flist_empty(&td->io_log_list)) ||
579                 ((td->this_io_bytes[0] + td->this_io_bytes[1]) < td->o.size) ) {
580                 struct timeval comp_time;
581                 unsigned long bytes_done[2] = { 0, 0 };
582                 int min_evts = 0;
583                 struct io_u *io_u;
584                 int ret2, full;
585
586                 if (td->terminate)
587                         break;
588
589                 update_tv_cache(td);
590
591                 if (runtime_exceeded(td, &td->tv_cache)) {
592                         td->terminate = 1;
593                         break;
594                 }
595
596                 io_u = get_io_u(td);
597                 if (!io_u)
598                         break;
599
600                 /*
601                  * Add verification end_io handler, if asked to verify
602                  * a previously written file.
603                  */
604                 if (td->o.verify != VERIFY_NONE && io_u->ddir == DDIR_READ &&
605                     !td_rw(td)) {
606                         if (td->o.verify_async)
607                                 io_u->end_io = verify_io_u_async;
608                         else
609                                 io_u->end_io = verify_io_u;
610                         td_set_runstate(td, TD_VERIFYING);
611                 } else if (in_ramp_time(td))
612                         td_set_runstate(td, TD_RAMP);
613                 else
614                         td_set_runstate(td, TD_RUNNING);
615
616                 ret = td_io_queue(td, io_u);
617                 switch (ret) {
618                 case FIO_Q_COMPLETED:
619                         if (io_u->error) {
620                                 ret = -io_u->error;
621                                 clear_io_u(td, io_u);
622                         } else if (io_u->resid) {
623                                 int bytes = io_u->xfer_buflen - io_u->resid;
624                                 struct fio_file *f = io_u->file;
625
626                                 /*
627                                  * zero read, fail
628                                  */
629                                 if (!bytes) {
630                                         td_verror(td, EIO, "full resid");
631                                         put_io_u(td, io_u);
632                                         break;
633                                 }
634
635                                 io_u->xfer_buflen = io_u->resid;
636                                 io_u->xfer_buf += bytes;
637                                 io_u->offset += bytes;
638
639                                 td->ts.short_io_u[io_u->ddir]++;
640
641                                 if (io_u->offset == f->real_file_size)
642                                         goto sync_done;
643
644                                 requeue_io_u(td, &io_u);
645                         } else {
646 sync_done:
647                                 if (__should_check_rate(td, 0) ||
648                                     __should_check_rate(td, 1))
649                                         fio_gettime(&comp_time, NULL);
650
651                                 ret = io_u_sync_complete(td, io_u, bytes_done);
652                                 if (ret < 0)
653                                         break;
654                         }
655                         break;
656                 case FIO_Q_QUEUED:
657                         /*
658                          * if the engine doesn't have a commit hook,
659                          * the io_u is really queued. if it does have such
660                          * a hook, it has to call io_u_queued() itself.
661                          */
662                         if (td->io_ops->commit == NULL)
663                                 io_u_queued(td, io_u);
664                         break;
665                 case FIO_Q_BUSY:
666                         requeue_io_u(td, &io_u);
667                         ret2 = td_io_commit(td);
668                         if (ret2 < 0)
669                                 ret = ret2;
670                         break;
671                 default:
672                         assert(ret < 0);
673                         put_io_u(td, io_u);
674                         break;
675                 }
676
677                 if (break_on_this_error(td, &ret))
678                         break;
679
680                 /*
681                  * See if we need to complete some commands
682                  */
683                 full = queue_full(td) || ret == FIO_Q_BUSY;
684                 if (full || !td->o.iodepth_batch_complete) {
685                         min_evts = min(td->o.iodepth_batch_complete,
686                                         td->cur_depth);
687                         if (full && !min_evts)
688                                 min_evts = 1;
689
690                         if (__should_check_rate(td, 0) ||
691                             __should_check_rate(td, 1))
692                                 fio_gettime(&comp_time, NULL);
693
694                         do {
695                                 ret = io_u_queued_complete(td, min_evts, bytes_done);
696                                 if (ret < 0)
697                                         break;
698
699                         } while (full && (td->cur_depth > td->o.iodepth_low));
700                 }
701
702                 if (ret < 0)
703                         break;
704                 if (!(bytes_done[0] + bytes_done[1]))
705                         continue;
706
707                 if (!in_ramp_time(td) && should_check_rate(td, bytes_done)) {
708                         if (check_min_rate(td, &comp_time, bytes_done)) {
709                                 if (exitall_on_terminate)
710                                         terminate_threads(td->groupid);
711                                 td_verror(td, EIO, "check_min_rate");
712                                 break;
713                         }
714                 }
715
716                 if (td->o.thinktime) {
717                         unsigned long long b;
718
719                         b = td->io_blocks[0] + td->io_blocks[1];
720                         if (!(b % td->o.thinktime_blocks)) {
721                                 int left;
722
723                                 if (td->o.thinktime_spin)
724                                         usec_spin(td->o.thinktime_spin);
725
726                                 left = td->o.thinktime - td->o.thinktime_spin;
727                                 if (left)
728                                         usec_sleep(td, left);
729                         }
730                 }
731         }
732
733         if (td->o.fill_device && td->error == ENOSPC) {
734                 td->error = 0;
735                 td->terminate = 1;
736         }
737         if (!td->error) {
738                 struct fio_file *f;
739
740                 i = td->cur_depth;
741                 if (i)
742                         ret = io_u_queued_complete(td, i, NULL);
743
744                 if (should_fsync(td) && td->o.end_fsync) {
745                         td_set_runstate(td, TD_FSYNCING);
746
747                         for_each_file(td, f, i) {
748                                 if (!fio_file_open(f))
749                                         continue;
750                                 fio_io_sync(td, f);
751                         }
752                 }
753         } else
754                 cleanup_pending_aio(td);
755
756         /*
757          * stop job if we failed doing any IO
758          */
759         if ((td->this_io_bytes[0] + td->this_io_bytes[1]) == 0)
760                 td->done = 1;
761 }
762
763 static void cleanup_io_u(struct thread_data *td)
764 {
765         struct flist_head *entry, *n;
766         struct io_u *io_u;
767
768         flist_for_each_safe(entry, n, &td->io_u_freelist) {
769                 io_u = flist_entry(entry, struct io_u, list);
770
771                 flist_del(&io_u->list);
772                 free(io_u);
773         }
774
775         free_io_mem(td);
776 }
777
778 static int init_io_u(struct thread_data *td)
779 {
780         struct io_u *io_u;
781         unsigned int max_bs;
782         int cl_align, i, max_units;
783         char *p;
784
785         max_units = td->o.iodepth;
786         max_bs = max(td->o.max_bs[DDIR_READ], td->o.max_bs[DDIR_WRITE]);
787         td->orig_buffer_size = (unsigned long long) max_bs
788                                         * (unsigned long long) max_units;
789
790         if (td->o.mem_type == MEM_SHMHUGE || td->o.mem_type == MEM_MMAPHUGE) {
791                 unsigned long bs;
792
793                 bs = td->orig_buffer_size + td->o.hugepage_size - 1;
794                 td->orig_buffer_size = bs & ~(td->o.hugepage_size - 1);
795         }
796
797         if (td->orig_buffer_size != (size_t) td->orig_buffer_size) {
798                 log_err("fio: IO memory too large. Reduce max_bs or iodepth\n");
799                 return 1;
800         }
801
802         if (allocate_io_mem(td))
803                 return 1;
804
805         if (td->o.odirect || td->o.mem_align)
806                 p = PAGE_ALIGN(td->orig_buffer) + td->o.mem_align;
807         else
808                 p = td->orig_buffer;
809
810         cl_align = os_cache_line_size();
811
812         for (i = 0; i < max_units; i++) {
813                 void *ptr;
814
815                 if (td->terminate)
816                         return 1;
817
818                 if (posix_memalign(&ptr, cl_align, sizeof(*io_u))) {
819                         log_err("fio: posix_memalign=%s\n", strerror(errno));
820                         break;
821                 }
822
823                 io_u = ptr;
824                 memset(io_u, 0, sizeof(*io_u));
825                 INIT_FLIST_HEAD(&io_u->list);
826                 dprint(FD_MEM, "io_u alloc %p, index %u\n", io_u, i);
827
828                 if (!(td->io_ops->flags & FIO_NOIO)) {
829                         io_u->buf = p + max_bs * i;
830                         dprint(FD_MEM, "io_u %p, mem %p\n", io_u, io_u->buf);
831
832                         if (td_write(td) && !td->o.refill_buffers)
833                                 io_u_fill_buffer(td, io_u, max_bs);
834                 }
835
836                 io_u->index = i;
837                 io_u->flags = IO_U_F_FREE;
838                 flist_add(&io_u->list, &td->io_u_freelist);
839         }
840
841         return 0;
842 }
843
844 static int switch_ioscheduler(struct thread_data *td)
845 {
846         char tmp[256], tmp2[128];
847         FILE *f;
848         int ret;
849
850         if (td->io_ops->flags & FIO_DISKLESSIO)
851                 return 0;
852
853         sprintf(tmp, "%s/queue/scheduler", td->sysfs_root);
854
855         f = fopen(tmp, "r+");
856         if (!f) {
857                 if (errno == ENOENT) {
858                         log_err("fio: os or kernel doesn't support IO scheduler"
859                                 " switching\n");
860                         return 0;
861                 }
862                 td_verror(td, errno, "fopen iosched");
863                 return 1;
864         }
865
866         /*
867          * Set io scheduler.
868          */
869         ret = fwrite(td->o.ioscheduler, strlen(td->o.ioscheduler), 1, f);
870         if (ferror(f) || ret != 1) {
871                 td_verror(td, errno, "fwrite");
872                 fclose(f);
873                 return 1;
874         }
875
876         rewind(f);
877
878         /*
879          * Read back and check that the selected scheduler is now the default.
880          */
881         ret = fread(tmp, 1, sizeof(tmp), f);
882         if (ferror(f) || ret < 0) {
883                 td_verror(td, errno, "fread");
884                 fclose(f);
885                 return 1;
886         }
887
888         sprintf(tmp2, "[%s]", td->o.ioscheduler);
889         if (!strstr(tmp, tmp2)) {
890                 log_err("fio: io scheduler %s not found\n", td->o.ioscheduler);
891                 td_verror(td, EINVAL, "iosched_switch");
892                 fclose(f);
893                 return 1;
894         }
895
896         fclose(f);
897         return 0;
898 }
899
900 static int keep_running(struct thread_data *td)
901 {
902         unsigned long long io_done;
903
904         if (td->done)
905                 return 0;
906         if (td->o.time_based)
907                 return 1;
908         if (td->o.loops) {
909                 td->o.loops--;
910                 return 1;
911         }
912
913         io_done = td->io_bytes[DDIR_READ] + td->io_bytes[DDIR_WRITE]
914                         + td->io_skip_bytes;
915         if (io_done < td->o.size)
916                 return 1;
917
918         return 0;
919 }
920
921 static void reset_io_counters(struct thread_data *td)
922 {
923         td->ts.stat_io_bytes[0] = td->ts.stat_io_bytes[1] = 0;
924         td->this_io_bytes[0] = td->this_io_bytes[1] = 0;
925         td->zone_bytes = 0;
926         td->rate_bytes[0] = td->rate_bytes[1] = 0;
927         td->rate_blocks[0] = td->rate_blocks[1] = 0;
928
929         td->last_was_sync = 0;
930
931         /*
932          * reset file done count if we are to start over
933          */
934         if (td->o.time_based || td->o.loops)
935                 td->nr_done_files = 0;
936
937         /*
938          * Set the same seed to get repeatable runs
939          */
940         td_fill_rand_seeds(td);
941 }
942
943 void reset_all_stats(struct thread_data *td)
944 {
945         struct timeval tv;
946         int i;
947
948         reset_io_counters(td);
949
950         for (i = 0; i < 2; i++) {
951                 td->io_bytes[i] = 0;
952                 td->io_blocks[i] = 0;
953                 td->io_issues[i] = 0;
954                 td->ts.total_io_u[i] = 0;
955         }
956         
957         fio_gettime(&tv, NULL);
958         memcpy(&td->epoch, &tv, sizeof(tv));
959         memcpy(&td->start, &tv, sizeof(tv));
960 }
961
962 static void clear_io_state(struct thread_data *td)
963 {
964         struct fio_file *f;
965         unsigned int i;
966
967         reset_io_counters(td);
968
969         close_files(td);
970         for_each_file(td, f, i)
971                 fio_file_clear_done(f);
972 }
973
974 static int exec_string(const char *string)
975 {
976         int ret, newlen = strlen(string) + 1 + 8;
977         char *str;
978
979         str = malloc(newlen);
980         sprintf(str, "sh -c %s", string);
981
982         ret = system(str);
983         if (ret == -1)
984                 log_err("fio: exec of cmd <%s> failed\n", str);
985
986         free(str);
987         return ret;
988 }
989
990 /*
991  * Entry point for the thread based jobs. The process based jobs end up
992  * here as well, after a little setup.
993  */
994 static void *thread_main(void *data)
995 {
996         unsigned long long runtime[2], elapsed;
997         struct thread_data *td = data;
998         pthread_condattr_t attr;
999         int clear_state;
1000
1001         if (!td->o.use_thread)
1002                 setsid();
1003
1004         td->pid = getpid();
1005
1006         dprint(FD_PROCESS, "jobs pid=%d started\n", (int) td->pid);
1007
1008         INIT_FLIST_HEAD(&td->io_u_freelist);
1009         INIT_FLIST_HEAD(&td->io_u_busylist);
1010         INIT_FLIST_HEAD(&td->io_u_requeues);
1011         INIT_FLIST_HEAD(&td->io_log_list);
1012         INIT_FLIST_HEAD(&td->io_hist_list);
1013         INIT_FLIST_HEAD(&td->verify_list);
1014         pthread_mutex_init(&td->io_u_lock, NULL);
1015         td->io_hist_tree = RB_ROOT;
1016
1017         pthread_condattr_init(&attr);
1018         pthread_cond_init(&td->verify_cond, &attr);
1019         pthread_cond_init(&td->free_cond, &attr);
1020
1021         td_set_runstate(td, TD_INITIALIZED);
1022         dprint(FD_MUTEX, "up startup_mutex\n");
1023         fio_mutex_up(startup_mutex);
1024         dprint(FD_MUTEX, "wait on td->mutex\n");
1025         fio_mutex_down(td->mutex);
1026         dprint(FD_MUTEX, "done waiting on td->mutex\n");
1027
1028         /*
1029          * the ->mutex mutex is now no longer used, close it to avoid
1030          * eating a file descriptor
1031          */
1032         fio_mutex_remove(td->mutex);
1033
1034         if (td->o.uid != -1U && setuid(td->o.uid)) {
1035                 td_verror(td, errno, "setuid");
1036                 goto err;
1037         }
1038         if (td->o.gid != -1U && setgid(td->o.gid)) {
1039                 td_verror(td, errno, "setgid");
1040                 goto err;
1041         }
1042
1043         /*
1044          * May alter parameters that init_io_u() will use, so we need to
1045          * do this first.
1046          */
1047         if (init_iolog(td))
1048                 goto err;
1049
1050         if (init_io_u(td))
1051                 goto err;
1052
1053         if (td->o.verify_async && verify_async_init(td))
1054                 goto err;
1055
1056         if (td->o.cpumask_set && fio_setaffinity(td->pid, td->o.cpumask) == -1) {
1057                 td_verror(td, errno, "cpu_set_affinity");
1058                 goto err;
1059         }
1060
1061         /*
1062          * If we have a gettimeofday() thread, make sure we exclude that
1063          * thread from this job
1064          */
1065         if (td->o.gtod_cpu) {
1066                 fio_cpu_clear(&td->o.cpumask, td->o.gtod_cpu);
1067                 if (fio_setaffinity(td->pid, td->o.cpumask) == -1) {
1068                         td_verror(td, errno, "cpu_set_affinity");
1069                         goto err;
1070                 }
1071         }
1072
1073         if (td->ioprio_set) {
1074                 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, td->ioprio) == -1) {
1075                         td_verror(td, errno, "ioprio_set");
1076                         goto err;
1077                 }
1078         }
1079
1080         if (td->o.cgroup_weight && cgroup_setup(td, cgroup_list, &cgroup_mnt))
1081                 goto err;
1082
1083         if (nice(td->o.nice) == -1) {
1084                 td_verror(td, errno, "nice");
1085                 goto err;
1086         }
1087
1088         if (td->o.ioscheduler && switch_ioscheduler(td))
1089                 goto err;
1090
1091         if (!td->o.create_serialize && setup_files(td))
1092                 goto err;
1093
1094         if (td_io_init(td))
1095                 goto err;
1096
1097         if (init_random_map(td))
1098                 goto err;
1099
1100         if (td->o.exec_prerun) {
1101                 if (exec_string(td->o.exec_prerun))
1102                         goto err;
1103         }
1104
1105         if (td->o.pre_read) {
1106                 if (pre_read_files(td) < 0)
1107                         goto err;
1108         }
1109
1110         fio_gettime(&td->epoch, NULL);
1111         getrusage(RUSAGE_SELF, &td->ts.ru_start);
1112
1113         runtime[0] = runtime[1] = 0;
1114         clear_state = 0;
1115         while (keep_running(td)) {
1116                 fio_gettime(&td->start, NULL);
1117                 memcpy(&td->ts.stat_sample_time[0], &td->start,
1118                                 sizeof(td->start));
1119                 memcpy(&td->ts.stat_sample_time[1], &td->start,
1120                                 sizeof(td->start));
1121                 memcpy(&td->tv_cache, &td->start, sizeof(td->start));
1122
1123                 if (td->o.ratemin[0] || td->o.ratemin[1])
1124                         memcpy(&td->lastrate, &td->ts.stat_sample_time,
1125                                                         sizeof(td->lastrate));
1126
1127                 if (clear_state)
1128                         clear_io_state(td);
1129
1130                 prune_io_piece_log(td);
1131
1132                 do_io(td);
1133
1134                 clear_state = 1;
1135
1136                 if (td_read(td) && td->io_bytes[DDIR_READ]) {
1137                         elapsed = utime_since_now(&td->start);
1138                         runtime[DDIR_READ] += elapsed;
1139                 }
1140                 if (td_write(td) && td->io_bytes[DDIR_WRITE]) {
1141                         elapsed = utime_since_now(&td->start);
1142                         runtime[DDIR_WRITE] += elapsed;
1143                 }
1144
1145                 if (td->error || td->terminate)
1146                         break;
1147
1148                 if (!td->o.do_verify ||
1149                     td->o.verify == VERIFY_NONE ||
1150                     (td->io_ops->flags & FIO_UNIDIR))
1151                         continue;
1152
1153                 clear_io_state(td);
1154
1155                 fio_gettime(&td->start, NULL);
1156
1157                 do_verify(td);
1158
1159                 runtime[DDIR_READ] += utime_since_now(&td->start);
1160
1161                 if (td->error || td->terminate)
1162                         break;
1163         }
1164
1165         update_rusage_stat(td);
1166         td->ts.runtime[0] = (runtime[0] + 999) / 1000;
1167         td->ts.runtime[1] = (runtime[1] + 999) / 1000;
1168         td->ts.total_run_time = mtime_since_now(&td->epoch);
1169         td->ts.io_bytes[0] = td->io_bytes[0];
1170         td->ts.io_bytes[1] = td->io_bytes[1];
1171
1172         fio_mutex_down(writeout_mutex);
1173         if (td->ts.bw_log) {
1174                 if (td->o.bw_log_file) {
1175                         finish_log_named(td, td->ts.bw_log,
1176                                                 td->o.bw_log_file, "bw");
1177                 } else
1178                         finish_log(td, td->ts.bw_log, "bw");
1179         }
1180         if (td->ts.lat_log) {
1181                 if (td->o.lat_log_file) {
1182                         finish_log_named(td, td->ts.lat_log,
1183                                                 td->o.lat_log_file, "lat");
1184                 } else
1185                         finish_log(td, td->ts.lat_log, "lat");
1186         }
1187         if (td->ts.slat_log) {
1188                 if (td->o.lat_log_file) {
1189                         finish_log_named(td, td->ts.slat_log,
1190                                                 td->o.lat_log_file, "slat");
1191                 } else
1192                         finish_log(td, td->ts.slat_log, "slat");
1193         }
1194         if (td->ts.clat_log) {
1195                 if (td->o.lat_log_file) {
1196                         finish_log_named(td, td->ts.clat_log,
1197                                                 td->o.lat_log_file, "clat");
1198                 } else
1199                         finish_log(td, td->ts.clat_log, "clat");
1200         }
1201         fio_mutex_up(writeout_mutex);
1202         if (td->o.exec_postrun)
1203                 exec_string(td->o.exec_postrun);
1204
1205         if (exitall_on_terminate)
1206                 terminate_threads(td->groupid);
1207
1208 err:
1209         if (td->error)
1210                 log_info("fio: pid=%d, err=%d/%s\n", (int) td->pid, td->error,
1211                                                         td->verror);
1212
1213         if (td->o.verify_async)
1214                 verify_async_exit(td);
1215
1216         close_and_free_files(td);
1217         close_ioengine(td);
1218         cleanup_io_u(td);
1219         cgroup_shutdown(td, &cgroup_mnt);
1220
1221         if (td->o.cpumask_set) {
1222                 int ret = fio_cpuset_exit(&td->o.cpumask);
1223
1224                 td_verror(td, ret, "fio_cpuset_exit");
1225         }
1226
1227         /*
1228          * do this very late, it will log file closing as well
1229          */
1230         if (td->o.write_iolog_file)
1231                 write_iolog_close(td);
1232
1233         options_mem_free(td);
1234         td_set_runstate(td, TD_EXITED);
1235         return (void *) (unsigned long) td->error;
1236 }
1237
1238 /*
1239  * We cannot pass the td data into a forked process, so attach the td and
1240  * pass it to the thread worker.
1241  */
1242 static int fork_main(int shmid, int offset)
1243 {
1244         struct thread_data *td;
1245         void *data, *ret;
1246
1247         data = shmat(shmid, NULL, 0);
1248         if (data == (void *) -1) {
1249                 int __err = errno;
1250
1251                 perror("shmat");
1252                 return __err;
1253         }
1254
1255         td = data + offset * sizeof(struct thread_data);
1256         ret = thread_main(td);
1257         shmdt(data);
1258         return (int) (unsigned long) ret;
1259 }
1260
1261 /*
1262  * Run over the job map and reap the threads that have exited, if any.
1263  */
1264 static void reap_threads(int *nr_running, int *t_rate, int *m_rate)
1265 {
1266         struct thread_data *td;
1267         int i, cputhreads, realthreads, pending, status, ret;
1268
1269         /*
1270          * reap exited threads (TD_EXITED -> TD_REAPED)
1271          */
1272         realthreads = pending = cputhreads = 0;
1273         for_each_td(td, i) {
1274                 int flags = 0;
1275
1276                 /*
1277                  * ->io_ops is NULL for a thread that has closed its
1278                  * io engine
1279                  */
1280                 if (td->io_ops && !strcmp(td->io_ops->name, "cpuio"))
1281                         cputhreads++;
1282                 else
1283                         realthreads++;
1284
1285                 if (!td->pid) {
1286                         pending++;
1287                         continue;
1288                 }
1289                 if (td->runstate == TD_REAPED)
1290                         continue;
1291                 if (td->o.use_thread) {
1292                         if (td->runstate == TD_EXITED) {
1293                                 td_set_runstate(td, TD_REAPED);
1294                                 goto reaped;
1295                         }
1296                         continue;
1297                 }
1298
1299                 flags = WNOHANG;
1300                 if (td->runstate == TD_EXITED)
1301                         flags = 0;
1302
1303                 /*
1304                  * check if someone quit or got killed in an unusual way
1305                  */
1306                 ret = waitpid(td->pid, &status, flags);
1307                 if (ret < 0) {
1308                         if (errno == ECHILD) {
1309                                 log_err("fio: pid=%d disappeared %d\n",
1310                                                 (int) td->pid, td->runstate);
1311                                 td_set_runstate(td, TD_REAPED);
1312                                 goto reaped;
1313                         }
1314                         perror("waitpid");
1315                 } else if (ret == td->pid) {
1316                         if (WIFSIGNALED(status)) {
1317                                 int sig = WTERMSIG(status);
1318
1319                                 if (sig != SIGQUIT)
1320                                         log_err("fio: pid=%d, got signal=%d\n",
1321                                                         (int) td->pid, sig);
1322                                 td_set_runstate(td, TD_REAPED);
1323                                 goto reaped;
1324                         }
1325                         if (WIFEXITED(status)) {
1326                                 if (WEXITSTATUS(status) && !td->error)
1327                                         td->error = WEXITSTATUS(status);
1328
1329                                 td_set_runstate(td, TD_REAPED);
1330                                 goto reaped;
1331                         }
1332                 }
1333
1334                 /*
1335                  * thread is not dead, continue
1336                  */
1337                 pending++;
1338                 continue;
1339 reaped:
1340                 (*nr_running)--;
1341                 (*m_rate) -= (td->o.ratemin[0] + td->o.ratemin[1]);
1342                 (*t_rate) -= (td->o.rate[0] + td->o.rate[1]);
1343                 if (!td->pid)
1344                         pending--;
1345
1346                 if (td->error)
1347                         exit_value++;
1348
1349                 done_secs += mtime_since_now(&td->epoch) / 1000;
1350         }
1351
1352         if (*nr_running == cputhreads && !pending && realthreads)
1353                 terminate_threads(TERMINATE_ALL);
1354 }
1355
1356 static void *gtod_thread_main(void *data)
1357 {
1358         fio_mutex_up(startup_mutex);
1359
1360         /*
1361          * As long as we have jobs around, update the clock. It would be nice
1362          * to have some way of NOT hammering that CPU with gettimeofday(),
1363          * but I'm not sure what to use outside of a simple CPU nop to relax
1364          * it - we don't want to lose precision.
1365          */
1366         while (threads) {
1367                 fio_gtod_update();
1368                 nop;
1369         }
1370
1371         return NULL;
1372 }
1373
1374 static int fio_start_gtod_thread(void)
1375 {
1376         int ret;
1377
1378         ret = pthread_create(&gtod_thread, NULL, gtod_thread_main, NULL);
1379         if (ret) {
1380                 log_err("Can't create gtod thread: %s\n", strerror(ret));
1381                 return 1;
1382         }
1383
1384         ret = pthread_detach(gtod_thread);
1385         if (ret) {
1386                 log_err("Can't detatch gtod thread: %s\n", strerror(ret));
1387                 return 1;
1388         }
1389
1390         dprint(FD_MUTEX, "wait on startup_mutex\n");
1391         fio_mutex_down(startup_mutex);
1392         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1393         return 0;
1394 }
1395
1396 /*
1397  * Main function for kicking off and reaping jobs, as needed.
1398  */
1399 static void run_threads(void)
1400 {
1401         struct thread_data *td;
1402         unsigned long spent;
1403         int i, todo, nr_running, m_rate, t_rate, nr_started;
1404
1405         if (fio_pin_memory())
1406                 return;
1407
1408         if (fio_gtod_offload && fio_start_gtod_thread())
1409                 return;
1410
1411         if (!terse_output) {
1412                 log_info("Starting ");
1413                 if (nr_thread)
1414                         log_info("%d thread%s", nr_thread,
1415                                                 nr_thread > 1 ? "s" : "");
1416                 if (nr_process) {
1417                         if (nr_thread)
1418                                 printf(" and ");
1419                         log_info("%d process%s", nr_process,
1420                                                 nr_process > 1 ? "es" : "");
1421                 }
1422                 log_info("\n");
1423                 fflush(stdout);
1424         }
1425
1426         set_sig_handlers();
1427
1428         todo = thread_number;
1429         nr_running = 0;
1430         nr_started = 0;
1431         m_rate = t_rate = 0;
1432
1433         for_each_td(td, i) {
1434                 print_status_init(td->thread_number - 1);
1435
1436                 if (!td->o.create_serialize) {
1437                         init_disk_util(td);
1438                         continue;
1439                 }
1440
1441                 /*
1442                  * do file setup here so it happens sequentially,
1443                  * we don't want X number of threads getting their
1444                  * client data interspersed on disk
1445                  */
1446                 if (setup_files(td)) {
1447                         exit_value++;
1448                         if (td->error)
1449                                 log_err("fio: pid=%d, err=%d/%s\n",
1450                                         (int) td->pid, td->error, td->verror);
1451                         td_set_runstate(td, TD_REAPED);
1452                         todo--;
1453                 } else {
1454                         struct fio_file *f;
1455                         unsigned int i;
1456
1457                         /*
1458                          * for sharing to work, each job must always open
1459                          * its own files. so close them, if we opened them
1460                          * for creation
1461                          */
1462                         for_each_file(td, f, i) {
1463                                 if (fio_file_open(f))
1464                                         td_io_close_file(td, f);
1465                         }
1466                 }
1467
1468                 init_disk_util(td);
1469         }
1470
1471         set_genesis_time();
1472
1473         while (todo) {
1474                 struct thread_data *map[MAX_JOBS];
1475                 struct timeval this_start;
1476                 int this_jobs = 0, left;
1477
1478                 /*
1479                  * create threads (TD_NOT_CREATED -> TD_CREATED)
1480                  */
1481                 for_each_td(td, i) {
1482                         if (td->runstate != TD_NOT_CREATED)
1483                                 continue;
1484
1485                         /*
1486                          * never got a chance to start, killed by other
1487                          * thread for some reason
1488                          */
1489                         if (td->terminate) {
1490                                 todo--;
1491                                 continue;
1492                         }
1493
1494                         if (td->o.start_delay) {
1495                                 spent = mtime_since_genesis();
1496
1497                                 if (td->o.start_delay * 1000 > spent)
1498                                         continue;
1499                         }
1500
1501                         if (td->o.stonewall && (nr_started || nr_running)) {
1502                                 dprint(FD_PROCESS, "%s: stonewall wait\n",
1503                                                         td->o.name);
1504                                 break;
1505                         }
1506
1507                         /*
1508                          * Set state to created. Thread will transition
1509                          * to TD_INITIALIZED when it's done setting up.
1510                          */
1511                         td_set_runstate(td, TD_CREATED);
1512                         map[this_jobs++] = td;
1513                         nr_started++;
1514
1515                         if (td->o.use_thread) {
1516                                 int ret;
1517
1518                                 dprint(FD_PROCESS, "will pthread_create\n");
1519                                 ret = pthread_create(&td->thread, NULL,
1520                                                         thread_main, td);
1521                                 if (ret) {
1522                                         log_err("pthread_create: %s\n",
1523                                                         strerror(ret));
1524                                         nr_started--;
1525                                         break;
1526                                 }
1527                                 ret = pthread_detach(td->thread);
1528                                 if (ret)
1529                                         log_err("pthread_detach: %s",
1530                                                         strerror(ret));
1531                         } else {
1532                                 pid_t pid;
1533                                 dprint(FD_PROCESS, "will fork\n");
1534                                 pid = fork();
1535                                 if (!pid) {
1536                                         int ret = fork_main(shm_id, i);
1537
1538                                         _exit(ret);
1539                                 } else if (i == fio_debug_jobno)
1540                                         *fio_debug_jobp = pid;
1541                         }
1542                         dprint(FD_MUTEX, "wait on startup_mutex\n");
1543                         if (fio_mutex_down_timeout(startup_mutex, 10)) {
1544                                 log_err("fio: job startup hung? exiting.\n");
1545                                 terminate_threads(TERMINATE_ALL);
1546                                 fio_abort = 1;
1547                                 nr_started--;
1548                                 break;
1549                         }
1550                         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1551                 }
1552
1553                 /*
1554                  * Wait for the started threads to transition to
1555                  * TD_INITIALIZED.
1556                  */
1557                 fio_gettime(&this_start, NULL);
1558                 left = this_jobs;
1559                 while (left && !fio_abort) {
1560                         if (mtime_since_now(&this_start) > JOB_START_TIMEOUT)
1561                                 break;
1562
1563                         usleep(100000);
1564
1565                         for (i = 0; i < this_jobs; i++) {
1566                                 td = map[i];
1567                                 if (!td)
1568                                         continue;
1569                                 if (td->runstate == TD_INITIALIZED) {
1570                                         map[i] = NULL;
1571                                         left--;
1572                                 } else if (td->runstate >= TD_EXITED) {
1573                                         map[i] = NULL;
1574                                         left--;
1575                                         todo--;
1576                                         nr_running++; /* work-around... */
1577                                 }
1578                         }
1579                 }
1580
1581                 if (left) {
1582                         log_err("fio: %d jobs failed to start\n", left);
1583                         for (i = 0; i < this_jobs; i++) {
1584                                 td = map[i];
1585                                 if (!td)
1586                                         continue;
1587                                 kill(td->pid, SIGTERM);
1588                         }
1589                         break;
1590                 }
1591
1592                 /*
1593                  * start created threads (TD_INITIALIZED -> TD_RUNNING).
1594                  */
1595                 for_each_td(td, i) {
1596                         if (td->runstate != TD_INITIALIZED)
1597                                 continue;
1598
1599                         if (in_ramp_time(td))
1600                                 td_set_runstate(td, TD_RAMP);
1601                         else
1602                                 td_set_runstate(td, TD_RUNNING);
1603                         nr_running++;
1604                         nr_started--;
1605                         m_rate += td->o.ratemin[0] + td->o.ratemin[1];
1606                         t_rate += td->o.rate[0] + td->o.rate[1];
1607                         todo--;
1608                         fio_mutex_up(td->mutex);
1609                 }
1610
1611                 reap_threads(&nr_running, &t_rate, &m_rate);
1612
1613                 if (todo)
1614                         usleep(100000);
1615         }
1616
1617         while (nr_running) {
1618                 reap_threads(&nr_running, &t_rate, &m_rate);
1619                 usleep(10000);
1620         }
1621
1622         update_io_ticks();
1623         fio_unpin_memory();
1624 }
1625
1626 int main(int argc, char *argv[])
1627 {
1628         long ps;
1629
1630         sinit();
1631         init_rand(&__fio_rand_state);
1632
1633         /*
1634          * We need locale for number printing, if it isn't set then just
1635          * go with the US format.
1636          */
1637         if (!getenv("LC_NUMERIC"))
1638                 setlocale(LC_NUMERIC, "en_US");
1639
1640         ps = sysconf(_SC_PAGESIZE);
1641         if (ps < 0) {
1642                 log_err("Failed to get page size\n");
1643                 return 1;
1644         }
1645
1646         page_size = ps;
1647         page_mask = ps - 1;
1648
1649         fio_keywords_init();
1650
1651         if (parse_options(argc, argv))
1652                 return 1;
1653
1654         if (exec_profile && load_profile(exec_profile))
1655                 return 1;
1656
1657         if (!thread_number)
1658                 return 0;
1659
1660         if (write_bw_log) {
1661                 setup_log(&agg_io_log[DDIR_READ]);
1662                 setup_log(&agg_io_log[DDIR_WRITE]);
1663         }
1664
1665         startup_mutex = fio_mutex_init(0);
1666         writeout_mutex = fio_mutex_init(1);
1667
1668         set_genesis_time();
1669
1670         status_timer_arm();
1671
1672         cgroup_list = smalloc(sizeof(*cgroup_list));
1673         INIT_FLIST_HEAD(cgroup_list);
1674
1675         run_threads();
1676
1677         if (!fio_abort) {
1678                 show_run_stats();
1679                 if (write_bw_log) {
1680                         __finish_log(agg_io_log[DDIR_READ], "agg-read_bw.log");
1681                         __finish_log(agg_io_log[DDIR_WRITE],
1682                                         "agg-write_bw.log");
1683                 }
1684         }
1685
1686         cgroup_kill(cgroup_list);
1687         sfree(cgroup_list);
1688         sfree(cgroup_mnt);
1689
1690         fio_mutex_remove(startup_mutex);
1691         fio_mutex_remove(writeout_mutex);
1692         return exit_value;
1693 }