backend.c

   1 /*
   2  * fio - the flexible io tester
   3  *
   4  * Copyright (C) 2005 Jens Axboe <axboe@suse.de>
   5  * Copyright (C) 2006-2012 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 <limits.h>
  28 #include <signal.h>
  29 #include <time.h>
  30 #include <locale.h>
  31 #include <assert.h>
  32 #include <time.h>
  33 #include <inttypes.h>
  34 #include <sys/stat.h>
  35 #include <sys/wait.h>
  36 #include <sys/ipc.h>
  37 #include <sys/mman.h>
  38
  39 #include "fio.h"
  40 #ifndef FIO_NO_HAVE_SHM_H
  41 #include <sys/shm.h>
  42 #endif
  43 #include "hash.h"
  44 #include "smalloc.h"
  45 #include "verify.h"
  46 #include "trim.h"
  47 #include "diskutil.h"
  48 #include "cgroup.h"
  49 #include "profile.h"
  50 #include "lib/rand.h"
  51 #include "memalign.h"
  52 #include "server.h"
  53 #include "lib/getrusage.h"
  54 #include "idletime.h"
  55 #include "err.h"
  56 #include "lib/tp.h"
  57 #include "workqueue.h"
  58 #include "lib/mountcheck.h"
  59
  60 static pthread_t helper_thread;
  61 static pthread_mutex_t helper_lock;
  62 pthread_cond_t helper_cond;
  63 int helper_do_stat = 0;
  64
  65 static struct fio_mutex *startup_mutex;
  66 static struct flist_head *cgroup_list;
  67 static char *cgroup_mnt;
  68 static int exit_value;
  69 static volatile int fio_abort;
  70 static unsigned int nr_process = 0;
  71 static unsigned int nr_thread = 0;
  72
  73 struct io_log *agg_io_log[DDIR_RWDIR_CNT];
  74
  75 int groupid = 0;
  76 unsigned int thread_number = 0;
  77 unsigned int stat_number = 0;
  78 int shm_id = 0;
  79 int temp_stall_ts;
  80 unsigned long done_secs = 0;
  81 volatile int helper_exit = 0;
  82
  83 #define PAGE_ALIGN(buf) \
  84         (char *) (((uintptr_t) (buf) + page_mask) & ~page_mask)
  85
  86 #define JOB_START_TIMEOUT       (5 * 1000)
  87
  88 static void sig_int(int sig)
  89 {
  90         if (threads) {
  91                 if (is_backend)
  92                         fio_server_got_signal(sig);
  93                 else {
  94                         log_info("\nfio: terminating on signal %d\n", sig);
  95                         log_info_flush();
  96                         exit_value = 128;
  97                 }
  98
  99                 fio_terminate_threads(TERMINATE_ALL);
 100         }
 101 }
 102
 103 static void sig_show_status(int sig)
 104 {
 105         show_running_run_stats();
 106 }
 107
 108 static void set_sig_handlers(void)
 109 {
 110         struct sigaction act;
 111
 112         memset(&act, 0, sizeof(act));
 113         act.sa_handler = sig_int;
 114         act.sa_flags = SA_RESTART;
 115         sigaction(SIGINT, &act, NULL);
 116
 117         memset(&act, 0, sizeof(act));
 118         act.sa_handler = sig_int;
 119         act.sa_flags = SA_RESTART;
 120         sigaction(SIGTERM, &act, NULL);
 121
 122 /* Windows uses SIGBREAK as a quit signal from other applications */
 123 #ifdef WIN32
 124         memset(&act, 0, sizeof(act));
 125         act.sa_handler = sig_int;
 126         act.sa_flags = SA_RESTART;
 127         sigaction(SIGBREAK, &act, NULL);
 128 #endif
 129
 130         memset(&act, 0, sizeof(act));
 131         act.sa_handler = sig_show_status;
 132         act.sa_flags = SA_RESTART;
 133         sigaction(SIGUSR1, &act, NULL);
 134
 135         if (is_backend) {
 136                 memset(&act, 0, sizeof(act));
 137                 act.sa_handler = sig_int;
 138                 act.sa_flags = SA_RESTART;
 139                 sigaction(SIGPIPE, &act, NULL);
 140         }
 141 }
 142
 143 /*
 144  * Check if we are above the minimum rate given.
 145  */
 146 static int __check_min_rate(struct thread_data *td, struct timeval *now,
 147                             enum fio_ddir ddir)
 148 {
 149         unsigned long long bytes = 0;
 150         unsigned long iops = 0;
 151         unsigned long spent;
 152         unsigned long rate;
 153         unsigned int ratemin = 0;
 154         unsigned int rate_iops = 0;
 155         unsigned int rate_iops_min = 0;
 156
 157         assert(ddir_rw(ddir));
 158
 159         if (!td->o.ratemin[ddir] && !td->o.rate_iops_min[ddir])
 160                 return 0;
 161
 162         /*
 163          * allow a 2 second settle period in the beginning
 164          */
 165         if (mtime_since(&td->start, now) < 2000)
 166                 return 0;
 167
 168         iops += td->this_io_blocks[ddir];
 169         bytes += td->this_io_bytes[ddir];
 170         ratemin += td->o.ratemin[ddir];
 171         rate_iops += td->o.rate_iops[ddir];
 172         rate_iops_min += td->o.rate_iops_min[ddir];
 173
 174         /*
 175          * if rate blocks is set, sample is running
 176          */
 177         if (td->rate_bytes[ddir] || td->rate_blocks[ddir]) {
 178                 spent = mtime_since(&td->lastrate[ddir], now);
 179                 if (spent < td->o.ratecycle)
 180                         return 0;
 181
 182                 if (td->o.rate[ddir]) {
 183                         /*
 184                          * check bandwidth specified rate
 185                          */
 186                         if (bytes < td->rate_bytes[ddir]) {
 187                                 log_err("%s: min rate %u not met\n", td->o.name,
 188                                                                 ratemin);
 189                                 return 1;
 190                         } else {
 191                                 if (spent)
 192                                         rate = ((bytes - td->rate_bytes[ddir]) * 1000) / spent;
 193                                 else
 194                                         rate = 0;
 195
 196                                 if (rate < ratemin ||
 197                                     bytes < td->rate_bytes[ddir]) {
 198                                         log_err("%s: min rate %u not met, got"
 199                                                 " %luKB/sec\n", td->o.name,
 200                                                         ratemin, rate);
 201                                         return 1;
 202                                 }
 203                         }
 204                 } else {
 205                         /*
 206                          * checks iops specified rate
 207                          */
 208                         if (iops < rate_iops) {
 209                                 log_err("%s: min iops rate %u not met\n",
 210                                                 td->o.name, rate_iops);
 211                                 return 1;
 212                         } else {
 213                                 if (spent)
 214                                         rate = ((iops - td->rate_blocks[ddir]) * 1000) / spent;
 215                                 else
 216                                         rate = 0;
 217
 218                                 if (rate < rate_iops_min ||
 219                                     iops < td->rate_blocks[ddir]) {
 220                                         log_err("%s: min iops rate %u not met,"
 221                                                 " got %lu\n", td->o.name,
 222                                                         rate_iops_min, rate);
 223                                 }
 224                         }
 225                 }
 226         }
 227
 228         td->rate_bytes[ddir] = bytes;
 229         td->rate_blocks[ddir] = iops;
 230         memcpy(&td->lastrate[ddir], now, sizeof(*now));
 231         return 0;
 232 }
 233
 234 static int check_min_rate(struct thread_data *td, struct timeval *now)
 235 {
 236         int ret = 0;
 237
 238         if (td->bytes_done[DDIR_READ])
 239                 ret |= __check_min_rate(td, now, DDIR_READ);
 240         if (td->bytes_done[DDIR_WRITE])
 241                 ret |= __check_min_rate(td, now, DDIR_WRITE);
 242         if (td->bytes_done[DDIR_TRIM])
 243                 ret |= __check_min_rate(td, now, DDIR_TRIM);
 244
 245         return ret;
 246 }
 247
 248 /*
 249  * When job exits, we can cancel the in-flight IO if we are using async
 250  * io. Attempt to do so.
 251  */
 252 static void cleanup_pending_aio(struct thread_data *td)
 253 {
 254         int r;
 255
 256         /*
 257          * get immediately available events, if any
 258          */
 259         r = io_u_queued_complete(td, 0);
 260         if (r < 0)
 261                 return;
 262
 263         /*
 264          * now cancel remaining active events
 265          */
 266         if (td->io_ops->cancel) {
 267                 struct io_u *io_u;
 268                 int i;
 269
 270                 io_u_qiter(&td->io_u_all, io_u, i) {
 271                         if (io_u->flags & IO_U_F_FLIGHT) {
 272                                 r = td->io_ops->cancel(td, io_u);
 273                                 if (!r)
 274                                         put_io_u(td, io_u);
 275                         }
 276                 }
 277         }
 278
 279         if (td->cur_depth)
 280                 r = io_u_queued_complete(td, td->cur_depth);
 281 }
 282
 283 /*
 284  * Helper to handle the final sync of a file. Works just like the normal
 285  * io path, just does everything sync.
 286  */
 287 static int fio_io_sync(struct thread_data *td, struct fio_file *f)
 288 {
 289         struct io_u *io_u = __get_io_u(td);
 290         int ret;
 291
 292         if (!io_u)
 293                 return 1;
 294
 295         io_u->ddir = DDIR_SYNC;
 296         io_u->file = f;
 297
 298         if (td_io_prep(td, io_u)) {
 299                 put_io_u(td, io_u);
 300                 return 1;
 301         }
 302
 303 requeue:
 304         ret = td_io_queue(td, io_u);
 305         if (ret < 0) {
 306                 td_verror(td, io_u->error, "td_io_queue");
 307                 put_io_u(td, io_u);
 308                 return 1;
 309         } else if (ret == FIO_Q_QUEUED) {
 310                 if (io_u_queued_complete(td, 1) < 0)
 311                         return 1;
 312         } else if (ret == FIO_Q_COMPLETED) {
 313                 if (io_u->error) {
 314                         td_verror(td, io_u->error, "td_io_queue");
 315                         return 1;
 316                 }
 317
 318                 if (io_u_sync_complete(td, io_u) < 0)
 319                         return 1;
 320         } else if (ret == FIO_Q_BUSY) {
 321                 if (td_io_commit(td))
 322                         return 1;
 323                 goto requeue;
 324         }
 325
 326         return 0;
 327 }
 328
 329 static int fio_file_fsync(struct thread_data *td, struct fio_file *f)
 330 {
 331         int ret;
 332
 333         if (fio_file_open(f))
 334                 return fio_io_sync(td, f);
 335
 336         if (td_io_open_file(td, f))
 337                 return 1;
 338
 339         ret = fio_io_sync(td, f);
 340         td_io_close_file(td, f);
 341         return ret;
 342 }
 343
 344 static inline void __update_tv_cache(struct thread_data *td)
 345 {
 346         fio_gettime(&td->tv_cache, NULL);
 347 }
 348
 349 static inline void update_tv_cache(struct thread_data *td)
 350 {
 351         if ((++td->tv_cache_nr & td->tv_cache_mask) == td->tv_cache_mask)
 352                 __update_tv_cache(td);
 353 }
 354
 355 static inline int runtime_exceeded(struct thread_data *td, struct timeval *t)
 356 {
 357         if (in_ramp_time(td))
 358                 return 0;
 359         if (!td->o.timeout)
 360                 return 0;
 361         if (utime_since(&td->epoch, t) >= td->o.timeout)
 362                 return 1;
 363
 364         return 0;
 365 }
 366
 367 /*
 368  * We need to update the runtime consistently in ms, but keep a running
 369  * tally of the current elapsed time in microseconds for sub millisecond
 370  * updates.
 371  */
 372 static inline void update_runtime(struct thread_data *td,
 373                                   unsigned long long *elapsed_us,
 374                                   const enum fio_ddir ddir)
 375 {
 376         td->ts.runtime[ddir] -= (elapsed_us[ddir] + 999) / 1000;
 377         elapsed_us[ddir] += utime_since_now(&td->start);
 378         td->ts.runtime[ddir] += (elapsed_us[ddir] + 999) / 1000;
 379 }
 380
 381 static int break_on_this_error(struct thread_data *td, enum fio_ddir ddir,
 382                                int *retptr)
 383 {
 384         int ret = *retptr;
 385
 386         if (ret < 0 || td->error) {
 387                 int err = td->error;
 388                 enum error_type_bit eb;
 389
 390                 if (ret < 0)
 391                         err = -ret;
 392
 393                 eb = td_error_type(ddir, err);
 394                 if (!(td->o.continue_on_error & (1 << eb)))
 395                         return 1;
 396
 397                 if (td_non_fatal_error(td, eb, err)) {
 398                         /*
 399                          * Continue with the I/Os in case of
 400                          * a non fatal error.
 401                          */
 402                         update_error_count(td, err);
 403                         td_clear_error(td);
 404                         *retptr = 0;
 405                         return 0;
 406                 } else if (td->o.fill_device && err == ENOSPC) {
 407                         /*
 408                          * We expect to hit this error if
 409                          * fill_device option is set.
 410                          */
 411                         td_clear_error(td);
 412                         fio_mark_td_terminate(td);
 413                         return 1;
 414                 } else {
 415                         /*
 416                          * Stop the I/O in case of a fatal
 417                          * error.
 418                          */
 419                         update_error_count(td, err);
 420                         return 1;
 421                 }
 422         }
 423
 424         return 0;
 425 }
 426
 427 static void check_update_rusage(struct thread_data *td)
 428 {
 429         if (td->update_rusage) {
 430                 td->update_rusage = 0;
 431                 update_rusage_stat(td);
 432                 fio_mutex_up(td->rusage_sem);
 433         }
 434 }
 435
 436 static int wait_for_completions(struct thread_data *td, struct timeval *time)
 437 {
 438         const int full = queue_full(td);
 439         int min_evts = 0;
 440         int ret;
 441
 442         /*
 443          * if the queue is full, we MUST reap at least 1 event
 444          */
 445         min_evts = min(td->o.iodepth_batch_complete, td->cur_depth);
 446     if ((full && !min_evts) || !td->o.iodepth_batch_complete)
 447                 min_evts = 1;
 448
 449         if (time && (__should_check_rate(td, DDIR_READ) ||
 450             __should_check_rate(td, DDIR_WRITE) ||
 451             __should_check_rate(td, DDIR_TRIM)))
 452                 fio_gettime(time, NULL);
 453
 454         do {
 455                 ret = io_u_queued_complete(td, min_evts);
 456                 if (ret < 0)
 457                         break;
 458         } while (full && (td->cur_depth > td->o.iodepth_low));
 459
 460         return ret;
 461 }
 462
 463 int io_queue_event(struct thread_data *td, struct io_u *io_u, int *ret,
 464                    enum fio_ddir ddir, uint64_t *bytes_issued, int from_verify,
 465                    struct timeval *comp_time)
 466 {
 467         int ret2;
 468
 469         switch (*ret) {
 470         case FIO_Q_COMPLETED:
 471                 if (io_u->error) {
 472                         *ret = -io_u->error;
 473                         clear_io_u(td, io_u);
 474                 } else if (io_u->resid) {
 475                         int bytes = io_u->xfer_buflen - io_u->resid;
 476                         struct fio_file *f = io_u->file;
 477
 478                         if (bytes_issued)
 479                                 *bytes_issued += bytes;
 480
 481                         if (!from_verify)
 482                                 trim_io_piece(td, io_u);
 483
 484                         /*
 485                          * zero read, fail
 486                          */
 487                         if (!bytes) {
 488                                 if (!from_verify)
 489                                         unlog_io_piece(td, io_u);
 490                                 td_verror(td, EIO, "full resid");
 491                                 put_io_u(td, io_u);
 492                                 break;
 493                         }
 494
 495                         io_u->xfer_buflen = io_u->resid;
 496                         io_u->xfer_buf += bytes;
 497                         io_u->offset += bytes;
 498
 499                         if (ddir_rw(io_u->ddir))
 500                                 td->ts.short_io_u[io_u->ddir]++;
 501
 502                         f = io_u->file;
 503                         if (io_u->offset == f->real_file_size)
 504                                 goto sync_done;
 505
 506                         requeue_io_u(td, &io_u);
 507                 } else {
 508 sync_done:
 509                         if (comp_time && (__should_check_rate(td, DDIR_READ) ||
 510                             __should_check_rate(td, DDIR_WRITE) ||
 511                             __should_check_rate(td, DDIR_TRIM)))
 512                                 fio_gettime(comp_time, NULL);
 513
 514                         *ret = io_u_sync_complete(td, io_u);
 515                         if (*ret < 0)
 516                                 break;
 517                 }
 518                 return 0;
 519         case FIO_Q_QUEUED:
 520                 /*
 521                  * if the engine doesn't have a commit hook,
 522                  * the io_u is really queued. if it does have such
 523                  * a hook, it has to call io_u_queued() itself.
 524                  */
 525                 if (td->io_ops->commit == NULL)
 526                         io_u_queued(td, io_u);
 527                 if (bytes_issued)
 528                         *bytes_issued += io_u->xfer_buflen;
 529                 break;
 530         case FIO_Q_BUSY:
 531                 if (!from_verify)
 532                         unlog_io_piece(td, io_u);
 533                 requeue_io_u(td, &io_u);
 534                 ret2 = td_io_commit(td);
 535                 if (ret2 < 0)
 536                         *ret = ret2;
 537                 break;
 538         default:
 539                 assert(ret < 0);
 540                 td_verror(td, -(*ret), "td_io_queue");
 541                 break;
 542         }
 543
 544         if (break_on_this_error(td, ddir, ret))
 545                 return 1;
 546
 547         return 0;
 548 }
 549
 550 /*
 551  * The main verify engine. Runs over the writes we previously submitted,
 552  * reads the blocks back in, and checks the crc/md5 of the data.
 553  */
 554 static void do_verify(struct thread_data *td, uint64_t verify_bytes)
 555 {
 556         struct fio_file *f;
 557         struct io_u *io_u;
 558         int ret, min_events;
 559         unsigned int i;
 560
 561         dprint(FD_VERIFY, "starting loop\n");
 562
 563         /*
 564          * sync io first and invalidate cache, to make sure we really
 565          * read from disk.
 566          */
 567         for_each_file(td, f, i) {
 568                 if (!fio_file_open(f))
 569                         continue;
 570                 if (fio_io_sync(td, f))
 571                         break;
 572                 if (file_invalidate_cache(td, f))
 573                         break;
 574         }
 575
 576         check_update_rusage(td);
 577
 578         if (td->error)
 579                 return;
 580
 581         td_set_runstate(td, TD_VERIFYING);
 582
 583         io_u = NULL;
 584         while (!td->terminate) {
 585                 enum fio_ddir ddir;
 586                 int full;
 587
 588                 update_tv_cache(td);
 589                 check_update_rusage(td);
 590
 591                 if (runtime_exceeded(td, &td->tv_cache)) {
 592                         __update_tv_cache(td);
 593                         if (runtime_exceeded(td, &td->tv_cache)) {
 594                                 fio_mark_td_terminate(td);
 595                                 break;
 596                         }
 597                 }
 598
 599                 if (flow_threshold_exceeded(td))
 600                         continue;
 601
 602                 if (!td->o.experimental_verify) {
 603                         io_u = __get_io_u(td);
 604                         if (!io_u)
 605                                 break;
 606
 607                         if (get_next_verify(td, io_u)) {
 608                                 put_io_u(td, io_u);
 609                                 break;
 610                         }
 611
 612                         if (td_io_prep(td, io_u)) {
 613                                 put_io_u(td, io_u);
 614                                 break;
 615                         }
 616                 } else {
 617                         if (ddir_rw_sum(td->bytes_done) + td->o.rw_min_bs > verify_bytes)
 618                                 break;
 619
 620                         while ((io_u = get_io_u(td)) != NULL) {
 621                                 if (IS_ERR(io_u)) {
 622                                         io_u = NULL;
 623                                         ret = FIO_Q_BUSY;
 624                                         goto reap;
 625                                 }
 626
 627                                 /*
 628                                  * We are only interested in the places where
 629                                  * we wrote or trimmed IOs. Turn those into
 630                                  * reads for verification purposes.
 631                                  */
 632                                 if (io_u->ddir == DDIR_READ) {
 633                                         /*
 634                                          * Pretend we issued it for rwmix
 635                                          * accounting
 636                                          */
 637                                         td->io_issues[DDIR_READ]++;
 638                                         put_io_u(td, io_u);
 639                                         continue;
 640                                 } else if (io_u->ddir == DDIR_TRIM) {
 641                                         io_u->ddir = DDIR_READ;
 642                                         io_u_set(io_u, IO_U_F_TRIMMED);
 643                                         break;
 644                                 } else if (io_u->ddir == DDIR_WRITE) {
 645                                         io_u->ddir = DDIR_READ;
 646                                         break;
 647                                 } else {
 648                                         put_io_u(td, io_u);
 649                                         continue;
 650                                 }
 651                         }
 652
 653                         if (!io_u)
 654                                 break;
 655                 }
 656
 657                 if (verify_state_should_stop(td, io_u)) {
 658                         put_io_u(td, io_u);
 659                         break;
 660                 }
 661
 662                 if (td->o.verify_async)
 663                         io_u->end_io = verify_io_u_async;
 664                 else
 665                         io_u->end_io = verify_io_u;
 666
 667                 ddir = io_u->ddir;
 668                 if (!td->o.disable_slat)
 669                         fio_gettime(&io_u->start_time, NULL);
 670
 671                 ret = td_io_queue(td, io_u);
 672
 673                 if (io_queue_event(td, io_u, &ret, ddir, NULL, 1, NULL))
 674                         break;
 675
 676                 /*
 677                  * if we can queue more, do so. but check if there are
 678                  * completed io_u's first. Note that we can get BUSY even
 679                  * without IO queued, if the system is resource starved.
 680                  */
 681 reap:
 682                 full = queue_full(td) || (ret == FIO_Q_BUSY && td->cur_depth);
 683                 if (full || !td->o.iodepth_batch_complete)
 684                         ret = wait_for_completions(td, NULL);
 685
 686                 if (ret < 0)
 687                         break;
 688         }
 689
 690         check_update_rusage(td);
 691
 692         if (!td->error) {
 693                 min_events = td->cur_depth;
 694
 695                 if (min_events)
 696                         ret = io_u_queued_complete(td, min_events);
 697         } else
 698                 cleanup_pending_aio(td);
 699
 700         td_set_runstate(td, TD_RUNNING);
 701
 702         dprint(FD_VERIFY, "exiting loop\n");
 703 }
 704
 705 static unsigned int exceeds_number_ios(struct thread_data *td)
 706 {
 707         unsigned long long number_ios;
 708
 709         if (!td->o.number_ios)
 710                 return 0;
 711
 712         number_ios = ddir_rw_sum(td->io_blocks);
 713         number_ios += td->io_u_queued + td->io_u_in_flight;
 714
 715         return number_ios >= (td->o.number_ios * td->loops);
 716 }
 717
 718 static int io_issue_bytes_exceeded(struct thread_data *td)
 719 {
 720         unsigned long long bytes, limit;
 721
 722         if (td_rw(td))
 723                 bytes = td->io_issue_bytes[DDIR_READ] + td->io_issue_bytes[DDIR_WRITE];
 724         else if (td_write(td))
 725                 bytes = td->io_issue_bytes[DDIR_WRITE];
 726         else if (td_read(td))
 727                 bytes = td->io_issue_bytes[DDIR_READ];
 728         else
 729                 bytes = td->io_issue_bytes[DDIR_TRIM];
 730
 731         if (td->o.io_limit)
 732                 limit = td->o.io_limit;
 733         else
 734                 limit = td->o.size;
 735
 736         limit *= td->loops;
 737         return bytes >= limit || exceeds_number_ios(td);
 738 }
 739
 740 static int io_complete_bytes_exceeded(struct thread_data *td)
 741 {
 742         unsigned long long bytes, limit;
 743
 744         if (td_rw(td))
 745                 bytes = td->this_io_bytes[DDIR_READ] + td->this_io_bytes[DDIR_WRITE];
 746         else if (td_write(td))
 747                 bytes = td->this_io_bytes[DDIR_WRITE];
 748         else if (td_read(td))
 749                 bytes = td->this_io_bytes[DDIR_READ];
 750         else
 751                 bytes = td->this_io_bytes[DDIR_TRIM];
 752
 753         if (td->o.io_limit)
 754                 limit = td->o.io_limit;
 755         else
 756                 limit = td->o.size;
 757
 758         limit *= td->loops;
 759         return bytes >= limit || exceeds_number_ios(td);
 760 }
 761
 762 /*
 763  * Main IO worker function. It retrieves io_u's to process and queues
 764  * and reaps them, checking for rate and errors along the way.
 765  *
 766  * Returns number of bytes written and trimmed.
 767  */
 768 static uint64_t do_io(struct thread_data *td)
 769 {
 770         unsigned int i;
 771         int ret = 0;
 772         uint64_t total_bytes, bytes_issued = 0;
 773
 774         if (in_ramp_time(td))
 775                 td_set_runstate(td, TD_RAMP);
 776         else
 777                 td_set_runstate(td, TD_RUNNING);
 778
 779         lat_target_init(td);
 780
 781         total_bytes = td->o.size;
 782         /*
 783         * Allow random overwrite workloads to write up to io_limit
 784         * before starting verification phase as 'size' doesn't apply.
 785         */
 786         if (td_write(td) && td_random(td) && td->o.norandommap)
 787                 total_bytes = max(total_bytes, (uint64_t) td->o.io_limit);
 788         /*
 789          * If verify_backlog is enabled, we'll run the verify in this
 790          * handler as well. For that case, we may need up to twice the
 791          * amount of bytes.
 792          */
 793         if (td->o.verify != VERIFY_NONE &&
 794            (td_write(td) && td->o.verify_backlog))
 795                 total_bytes += td->o.size;
 796
 797         /* In trimwrite mode, each byte is trimmed and then written, so
 798          * allow total_bytes to be twice as big */
 799         if (td_trimwrite(td))
 800                 total_bytes += td->total_io_size;
 801
 802         while ((td->o.read_iolog_file && !flist_empty(&td->io_log_list)) ||
 803                 (!flist_empty(&td->trim_list)) || !io_issue_bytes_exceeded(td) ||
 804                 td->o.time_based) {
 805                 struct timeval comp_time;
 806                 struct io_u *io_u;
 807                 int full;
 808                 enum fio_ddir ddir;
 809
 810                 check_update_rusage(td);
 811
 812                 if (td->terminate || td->done)
 813                         break;
 814
 815                 update_tv_cache(td);
 816
 817                 if (runtime_exceeded(td, &td->tv_cache)) {
 818                         __update_tv_cache(td);
 819                         if (runtime_exceeded(td, &td->tv_cache)) {
 820                                 fio_mark_td_terminate(td);
 821                                 break;
 822                         }
 823                 }
 824
 825                 if (flow_threshold_exceeded(td))
 826                         continue;
 827
 828                 if (bytes_issued >= total_bytes)
 829                         break;
 830
 831                 io_u = get_io_u(td);
 832                 if (IS_ERR_OR_NULL(io_u)) {
 833                         int err = PTR_ERR(io_u);
 834
 835                         io_u = NULL;
 836                         if (err == -EBUSY) {
 837                                 ret = FIO_Q_BUSY;
 838                                 goto reap;
 839                         }
 840                         if (td->o.latency_target)
 841                                 goto reap;
 842                         break;
 843                 }
 844
 845                 ddir = io_u->ddir;
 846
 847                 /*
 848                  * Add verification end_io handler if:
 849                  *      - Asked to verify (!td_rw(td))
 850                  *      - Or the io_u is from our verify list (mixed write/ver)
 851                  */
 852                 if (td->o.verify != VERIFY_NONE && io_u->ddir == DDIR_READ &&
 853                     ((io_u->flags & IO_U_F_VER_LIST) || !td_rw(td))) {
 854
 855                         if (!td->o.verify_pattern_bytes) {
 856                                 io_u->rand_seed = __rand(&td->verify_state);
 857                                 if (sizeof(int) != sizeof(long *))
 858                                         io_u->rand_seed *= __rand(&td->verify_state);
 859                         }
 860
 861                         if (verify_state_should_stop(td, io_u)) {
 862                                 put_io_u(td, io_u);
 863                                 break;
 864                         }
 865
 866                         if (td->o.verify_async)
 867                                 io_u->end_io = verify_io_u_async;
 868                         else
 869                                 io_u->end_io = verify_io_u;
 870                         td_set_runstate(td, TD_VERIFYING);
 871                 } else if (in_ramp_time(td))
 872                         td_set_runstate(td, TD_RAMP);
 873                 else
 874                         td_set_runstate(td, TD_RUNNING);
 875
 876                 /*
 877                  * Always log IO before it's issued, so we know the specific
 878                  * order of it. The logged unit will track when the IO has
 879                  * completed.
 880                  */
 881                 if (td_write(td) && io_u->ddir == DDIR_WRITE &&
 882                     td->o.do_verify &&
 883                     td->o.verify != VERIFY_NONE &&
 884                     !td->o.experimental_verify)
 885                         log_io_piece(td, io_u);
 886
 887                 if (td->o.io_submit_mode == IO_MODE_OFFLOAD) {
 888                         if (td->error)
 889                                 break;
 890                         ret = workqueue_enqueue(&td->io_wq, io_u);
 891                 } else {
 892                         ret = td_io_queue(td, io_u);
 893
 894                         if (io_queue_event(td, io_u, &ret, ddir, &bytes_issued, 1, &comp_time))
 895                                 break;
 896
 897                         /*
 898                          * See if we need to complete some commands. Note that
 899                          * we can get BUSY even without IO queued, if the
 900                          * system is resource starved.
 901                          */
 902 reap:
 903                         full = queue_full(td) ||
 904                                 (ret == FIO_Q_BUSY && td->cur_depth);
 905                         if (full || !td->o.iodepth_batch_complete)
 906                                 ret = wait_for_completions(td, &comp_time);
 907                 }
 908                 if (ret < 0)
 909                         break;
 910                 if (!ddir_rw_sum(td->bytes_done) &&
 911                     !(td->io_ops->flags & FIO_NOIO))
 912                         continue;
 913
 914                 if (!in_ramp_time(td) && should_check_rate(td)) {
 915                         if (check_min_rate(td, &comp_time)) {
 916                                 if (exitall_on_terminate)
 917                                         fio_terminate_threads(td->groupid);
 918                                 td_verror(td, EIO, "check_min_rate");
 919                                 break;
 920                         }
 921                 }
 922                 if (!in_ramp_time(td) && td->o.latency_target)
 923                         lat_target_check(td);
 924
 925                 if (td->o.thinktime) {
 926                         unsigned long long b;
 927
 928                         b = ddir_rw_sum(td->io_blocks);
 929                         if (!(b % td->o.thinktime_blocks)) {
 930                                 int left;
 931
 932                                 io_u_quiesce(td);
 933
 934                                 if (td->o.thinktime_spin)
 935                                         usec_spin(td->o.thinktime_spin);
 936
 937                                 left = td->o.thinktime - td->o.thinktime_spin;
 938                                 if (left)
 939                                         usec_sleep(td, left);
 940                         }
 941                 }
 942         }
 943
 944         check_update_rusage(td);
 945
 946         if (td->trim_entries)
 947                 log_err("fio: %lu trim entries leaked?\n", td->trim_entries);
 948
 949         if (td->o.fill_device && td->error == ENOSPC) {
 950                 td->error = 0;
 951                 fio_mark_td_terminate(td);
 952         }
 953         if (!td->error) {
 954                 struct fio_file *f;
 955
 956                 if (td->o.io_submit_mode == IO_MODE_OFFLOAD) {
 957                         workqueue_flush(&td->io_wq);
 958                         i = 0;
 959                 } else
 960                         i = td->cur_depth;
 961
 962                 if (i) {
 963                         ret = io_u_queued_complete(td, i);
 964                         if (td->o.fill_device && td->error == ENOSPC)
 965                                 td->error = 0;
 966                 }
 967
 968                 if (should_fsync(td) && td->o.end_fsync) {
 969                         td_set_runstate(td, TD_FSYNCING);
 970
 971                         for_each_file(td, f, i) {
 972                                 if (!fio_file_fsync(td, f))
 973                                         continue;
 974
 975                                 log_err("fio: end_fsync failed for file %s\n",
 976                                                                 f->file_name);
 977                         }
 978                 }
 979         } else
 980                 cleanup_pending_aio(td);
 981
 982         /*
 983          * stop job if we failed doing any IO
 984          */
 985         if (!ddir_rw_sum(td->this_io_bytes))
 986                 td->done = 1;
 987
 988         return td->bytes_done[DDIR_WRITE] + td->bytes_done[DDIR_TRIM];
 989 }
 990
 991 static void cleanup_io_u(struct thread_data *td)
 992 {
 993         struct io_u *io_u;
 994
 995         while ((io_u = io_u_qpop(&td->io_u_freelist)) != NULL) {
 996
 997                 if (td->io_ops->io_u_free)
 998                         td->io_ops->io_u_free(td, io_u);
 999
1000                 fio_memfree(io_u, sizeof(*io_u));
1001         }
1002
1003         free_io_mem(td);
1004
1005         io_u_rexit(&td->io_u_requeues);
1006         io_u_qexit(&td->io_u_freelist);
1007         io_u_qexit(&td->io_u_all);
1008
1009         if (td->last_write_comp)
1010                 sfree(td->last_write_comp);
1011 }
1012
1013 static int init_io_u(struct thread_data *td)
1014 {
1015         struct io_u *io_u;
1016         unsigned int max_bs, min_write;
1017         int cl_align, i, max_units;
1018         int data_xfer = 1, err;
1019         char *p;
1020
1021         max_units = td->o.iodepth;
1022         max_bs = td_max_bs(td);
1023         min_write = td->o.min_bs[DDIR_WRITE];
1024         td->orig_buffer_size = (unsigned long long) max_bs
1025                                         * (unsigned long long) max_units;
1026
1027         if ((td->io_ops->flags & FIO_NOIO) || !(td_read(td) || td_write(td)))
1028                 data_xfer = 0;
1029
1030         err = 0;
1031         err += io_u_rinit(&td->io_u_requeues, td->o.iodepth);
1032         err += io_u_qinit(&td->io_u_freelist, td->o.iodepth);
1033         err += io_u_qinit(&td->io_u_all, td->o.iodepth);
1034
1035         if (err) {
1036                 log_err("fio: failed setting up IO queues\n");
1037                 return 1;
1038         }
1039
1040         /*
1041          * if we may later need to do address alignment, then add any
1042          * possible adjustment here so that we don't cause a buffer
1043          * overflow later. this adjustment may be too much if we get
1044          * lucky and the allocator gives us an aligned address.
1045          */
1046         if (td->o.odirect || td->o.mem_align || td->o.oatomic ||
1047             (td->io_ops->flags & FIO_RAWIO))
1048                 td->orig_buffer_size += page_mask + td->o.mem_align;
1049
1050         if (td->o.mem_type == MEM_SHMHUGE || td->o.mem_type == MEM_MMAPHUGE) {
1051                 unsigned long bs;
1052
1053                 bs = td->orig_buffer_size + td->o.hugepage_size - 1;
1054                 td->orig_buffer_size = bs & ~(td->o.hugepage_size - 1);
1055         }
1056
1057         if (td->orig_buffer_size != (size_t) td->orig_buffer_size) {
1058                 log_err("fio: IO memory too large. Reduce max_bs or iodepth\n");
1059                 return 1;
1060         }
1061
1062         if (data_xfer && allocate_io_mem(td))
1063                 return 1;
1064
1065         if (td->o.odirect || td->o.mem_align || td->o.oatomic ||
1066             (td->io_ops->flags & FIO_RAWIO))
1067                 p = PAGE_ALIGN(td->orig_buffer) + td->o.mem_align;
1068         else
1069                 p = td->orig_buffer;
1070
1071         cl_align = os_cache_line_size();
1072
1073         for (i = 0; i < max_units; i++) {
1074                 void *ptr;
1075
1076                 if (td->terminate)
1077                         return 1;
1078
1079                 ptr = fio_memalign(cl_align, sizeof(*io_u));
1080                 if (!ptr) {
1081                         log_err("fio: unable to allocate aligned memory\n");
1082                         break;
1083                 }
1084
1085                 io_u = ptr;
1086                 memset(io_u, 0, sizeof(*io_u));
1087                 INIT_FLIST_HEAD(&io_u->verify_list);
1088                 dprint(FD_MEM, "io_u alloc %p, index %u\n", io_u, i);
1089
1090                 if (data_xfer) {
1091                         io_u->buf = p;
1092                         dprint(FD_MEM, "io_u %p, mem %p\n", io_u, io_u->buf);
1093
1094                         if (td_write(td))
1095                                 io_u_fill_buffer(td, io_u, min_write, max_bs);
1096                         if (td_write(td) && td->o.verify_pattern_bytes) {
1097                                 /*
1098                                  * Fill the buffer with the pattern if we are
1099                                  * going to be doing writes.
1100                                  */
1101                                 fill_verify_pattern(td, io_u->buf, max_bs, io_u, 0, 0);
1102                         }
1103                 }
1104
1105                 io_u->index = i;
1106                 io_u->flags = IO_U_F_FREE;
1107                 io_u_qpush(&td->io_u_freelist, io_u);
1108
1109                 /*
1110                  * io_u never leaves this stack, used for iteration of all
1111                  * io_u buffers.
1112                  */
1113                 io_u_qpush(&td->io_u_all, io_u);
1114
1115                 if (td->io_ops->io_u_init) {
1116                         int ret = td->io_ops->io_u_init(td, io_u);
1117
1118                         if (ret) {
1119                                 log_err("fio: failed to init engine data: %d\n", ret);
1120                                 return 1;
1121                         }
1122                 }
1123
1124                 p += max_bs;
1125         }
1126
1127         if (td->o.verify != VERIFY_NONE) {
1128                 td->last_write_comp = scalloc(max_units, sizeof(uint64_t));
1129                 if (!td->last_write_comp) {
1130                         log_err("fio: failed to alloc write comp data\n");
1131                         return 1;
1132                 }
1133         }
1134
1135         return 0;
1136 }
1137
1138 static int switch_ioscheduler(struct thread_data *td)
1139 {
1140         char tmp[256], tmp2[128];
1141         FILE *f;
1142         int ret;
1143
1144         if (td->io_ops->flags & FIO_DISKLESSIO)
1145                 return 0;
1146
1147         sprintf(tmp, "%s/queue/scheduler", td->sysfs_root);
1148
1149         f = fopen(tmp, "r+");
1150         if (!f) {
1151                 if (errno == ENOENT) {
1152                         log_err("fio: os or kernel doesn't support IO scheduler"
1153                                 " switching\n");
1154                         return 0;
1155                 }
1156                 td_verror(td, errno, "fopen iosched");
1157                 return 1;
1158         }
1159
1160         /*
1161          * Set io scheduler.
1162          */
1163         ret = fwrite(td->o.ioscheduler, strlen(td->o.ioscheduler), 1, f);
1164         if (ferror(f) || ret != 1) {
1165                 td_verror(td, errno, "fwrite");
1166                 fclose(f);
1167                 return 1;
1168         }
1169
1170         rewind(f);
1171
1172         /*
1173          * Read back and check that the selected scheduler is now the default.
1174          */
1175         ret = fread(tmp, sizeof(tmp), 1, f);
1176         if (ferror(f) || ret < 0) {
1177                 td_verror(td, errno, "fread");
1178                 fclose(f);
1179                 return 1;
1180         }
1181         tmp[sizeof(tmp) - 1] = '\0';
1182
1183
1184         sprintf(tmp2, "[%s]", td->o.ioscheduler);
1185         if (!strstr(tmp, tmp2)) {
1186                 log_err("fio: io scheduler %s not found\n", td->o.ioscheduler);
1187                 td_verror(td, EINVAL, "iosched_switch");
1188                 fclose(f);
1189                 return 1;
1190         }
1191
1192         fclose(f);
1193         return 0;
1194 }
1195
1196 static int keep_running(struct thread_data *td)
1197 {
1198         unsigned long long limit;
1199
1200         if (td->done)
1201                 return 0;
1202         if (td->o.time_based)
1203                 return 1;
1204         if (td->o.loops) {
1205                 td->o.loops--;
1206                 return 1;
1207         }
1208         if (exceeds_number_ios(td))
1209                 return 0;
1210
1211         if (td->o.io_limit)
1212                 limit = td->o.io_limit;
1213         else
1214                 limit = td->o.size;
1215
1216         if (limit != -1ULL && ddir_rw_sum(td->io_bytes) < limit) {
1217                 uint64_t diff;
1218
1219                 /*
1220                  * If the difference is less than the minimum IO size, we
1221                  * are done.
1222                  */
1223                 diff = limit - ddir_rw_sum(td->io_bytes);
1224                 if (diff < td_max_bs(td))
1225                         return 0;
1226
1227                 if (fio_files_done(td))
1228                         return 0;
1229
1230                 return 1;
1231         }
1232
1233         return 0;
1234 }
1235
1236 static int exec_string(struct thread_options *o, const char *string, const char *mode)
1237 {
1238         int ret, newlen = strlen(string) + strlen(o->name) + strlen(mode) + 9 + 1;
1239         char *str;
1240
1241         str = malloc(newlen);
1242         sprintf(str, "%s &> %s.%s.txt", string, o->name, mode);
1243
1244         log_info("%s : Saving output of %s in %s.%s.txt\n",o->name, mode, o->name, mode);
1245         ret = system(str);
1246         if (ret == -1)
1247                 log_err("fio: exec of cmd <%s> failed\n", str);
1248
1249         free(str);
1250         return ret;
1251 }
1252
1253 /*
1254  * Dry run to compute correct state of numberio for verification.
1255  */
1256 static uint64_t do_dry_run(struct thread_data *td)
1257 {
1258         td_set_runstate(td, TD_RUNNING);
1259
1260         while ((td->o.read_iolog_file && !flist_empty(&td->io_log_list)) ||
1261                 (!flist_empty(&td->trim_list)) || !io_complete_bytes_exceeded(td)) {
1262                 struct io_u *io_u;
1263                 int ret;
1264
1265                 if (td->terminate || td->done)
1266                         break;
1267
1268                 io_u = get_io_u(td);
1269                 if (!io_u)
1270                         break;
1271
1272                 io_u_set(io_u, IO_U_F_FLIGHT);
1273                 io_u->error = 0;
1274                 io_u->resid = 0;
1275                 if (ddir_rw(acct_ddir(io_u)))
1276                         td->io_issues[acct_ddir(io_u)]++;
1277                 if (ddir_rw(io_u->ddir)) {
1278                         io_u_mark_depth(td, 1);
1279                         td->ts.total_io_u[io_u->ddir]++;
1280                 }
1281
1282                 if (td_write(td) && io_u->ddir == DDIR_WRITE &&
1283                     td->o.do_verify &&
1284                     td->o.verify != VERIFY_NONE &&
1285                     !td->o.experimental_verify)
1286                         log_io_piece(td, io_u);
1287
1288                 ret = io_u_sync_complete(td, io_u);
1289                 (void) ret;
1290         }
1291
1292         return td->bytes_done[DDIR_WRITE] + td->bytes_done[DDIR_TRIM];
1293 }
1294
1295 static void io_workqueue_fn(struct thread_data *td, struct io_u *io_u)
1296 {
1297         const enum fio_ddir ddir = io_u->ddir;
1298         int ret;
1299
1300         dprint(FD_RATE, "io_u %p queued by %u\n", io_u, gettid());
1301
1302         io_u_set(io_u, IO_U_F_NO_FILE_PUT);
1303
1304         td->cur_depth++;
1305
1306         ret = td_io_queue(td, io_u);
1307
1308         dprint(FD_RATE, "io_u %p ret %d by %u\n", io_u, ret, gettid());
1309
1310         io_queue_event(td, io_u, &ret, ddir, NULL, 0, NULL);
1311
1312         if (ret == FIO_Q_QUEUED)
1313                 ret = io_u_queued_complete(td, 1);
1314
1315         td->cur_depth--;
1316 }
1317
1318 /*
1319  * Entry point for the thread based jobs. The process based jobs end up
1320  * here as well, after a little setup.
1321  */
1322 static void *thread_main(void *data)
1323 {
1324         unsigned long long elapsed_us[DDIR_RWDIR_CNT] = { 0, };
1325         struct thread_data *td = data;
1326         struct thread_options *o = &td->o;
1327         pthread_condattr_t attr;
1328         int clear_state;
1329         int ret;
1330
1331         if (!o->use_thread) {
1332                 setsid();
1333                 td->pid = getpid();
1334         } else
1335                 td->pid = gettid();
1336
1337         fio_local_clock_init(o->use_thread);
1338
1339         dprint(FD_PROCESS, "jobs pid=%d started\n", (int) td->pid);
1340
1341         if (is_backend)
1342                 fio_server_send_start(td);
1343
1344         INIT_FLIST_HEAD(&td->io_log_list);
1345         INIT_FLIST_HEAD(&td->io_hist_list);
1346         INIT_FLIST_HEAD(&td->verify_list);
1347         INIT_FLIST_HEAD(&td->trim_list);
1348         INIT_FLIST_HEAD(&td->next_rand_list);
1349         pthread_mutex_init(&td->io_u_lock, NULL);
1350         td->io_hist_tree = RB_ROOT;
1351
1352         pthread_condattr_init(&attr);
1353         pthread_cond_init(&td->verify_cond, &attr);
1354         pthread_cond_init(&td->free_cond, &attr);
1355
1356         td_set_runstate(td, TD_INITIALIZED);
1357         dprint(FD_MUTEX, "up startup_mutex\n");
1358         fio_mutex_up(startup_mutex);
1359         dprint(FD_MUTEX, "wait on td->mutex\n");
1360         fio_mutex_down(td->mutex);
1361         dprint(FD_MUTEX, "done waiting on td->mutex\n");
1362
1363         /*
1364          * A new gid requires privilege, so we need to do this before setting
1365          * the uid.
1366          */
1367         if (o->gid != -1U && setgid(o->gid)) {
1368                 td_verror(td, errno, "setgid");
1369                 goto err;
1370         }
1371         if (o->uid != -1U && setuid(o->uid)) {
1372                 td_verror(td, errno, "setuid");
1373                 goto err;
1374         }
1375
1376         /*
1377          * If we have a gettimeofday() thread, make sure we exclude that
1378          * thread from this job
1379          */
1380         if (o->gtod_cpu)
1381                 fio_cpu_clear(&o->cpumask, o->gtod_cpu);
1382
1383         /*
1384          * Set affinity first, in case it has an impact on the memory
1385          * allocations.
1386          */
1387         if (fio_option_is_set(o, cpumask)) {
1388                 if (o->cpus_allowed_policy == FIO_CPUS_SPLIT) {
1389                         ret = fio_cpus_split(&o->cpumask, td->thread_number - 1);
1390                         if (!ret) {
1391                                 log_err("fio: no CPUs set\n");
1392                                 log_err("fio: Try increasing number of available CPUs\n");
1393                                 td_verror(td, EINVAL, "cpus_split");
1394                                 goto err;
1395                         }
1396                 }
1397                 ret = fio_setaffinity(td->pid, o->cpumask);
1398                 if (ret == -1) {
1399                         td_verror(td, errno, "cpu_set_affinity");
1400                         goto err;
1401                 }
1402         }
1403
1404 #ifdef CONFIG_LIBNUMA
1405         /* numa node setup */
1406         if (fio_option_is_set(o, numa_cpunodes) ||
1407             fio_option_is_set(o, numa_memnodes)) {
1408                 struct bitmask *mask;
1409
1410                 if (numa_available() < 0) {
1411                         td_verror(td, errno, "Does not support NUMA API\n");
1412                         goto err;
1413                 }
1414
1415                 if (fio_option_is_set(o, numa_cpunodes)) {
1416                         mask = numa_parse_nodestring(o->numa_cpunodes);
1417                         ret = numa_run_on_node_mask(mask);
1418                         numa_free_nodemask(mask);
1419                         if (ret == -1) {
1420                                 td_verror(td, errno, \
1421                                         "numa_run_on_node_mask failed\n");
1422                                 goto err;
1423                         }
1424                 }
1425
1426                 if (fio_option_is_set(o, numa_memnodes)) {
1427                         mask = NULL;
1428                         if (o->numa_memnodes)
1429                                 mask = numa_parse_nodestring(o->numa_memnodes);
1430
1431                         switch (o->numa_mem_mode) {
1432                         case MPOL_INTERLEAVE:
1433                                 numa_set_interleave_mask(mask);
1434                                 break;
1435                         case MPOL_BIND:
1436                                 numa_set_membind(mask);
1437                                 break;
1438                         case MPOL_LOCAL:
1439                                 numa_set_localalloc();
1440                                 break;
1441                         case MPOL_PREFERRED:
1442                                 numa_set_preferred(o->numa_mem_prefer_node);
1443                                 break;
1444                         case MPOL_DEFAULT:
1445                         default:
1446                                 break;
1447                         }
1448
1449                         if (mask)
1450                                 numa_free_nodemask(mask);
1451
1452                 }
1453         }
1454 #endif
1455
1456         if (fio_pin_memory(td))
1457                 goto err;
1458
1459         /*
1460          * May alter parameters that init_io_u() will use, so we need to
1461          * do this first.
1462          */
1463         if (init_iolog(td))
1464                 goto err;
1465
1466         if (init_io_u(td))
1467                 goto err;
1468
1469         if (o->verify_async && verify_async_init(td))
1470                 goto err;
1471
1472         if (fio_option_is_set(o, ioprio) ||
1473             fio_option_is_set(o, ioprio_class)) {
1474                 ret = ioprio_set(IOPRIO_WHO_PROCESS, 0, o->ioprio_class, o->ioprio);
1475                 if (ret == -1) {
1476                         td_verror(td, errno, "ioprio_set");
1477                         goto err;
1478                 }
1479         }
1480
1481         if (o->cgroup && cgroup_setup(td, cgroup_list, &cgroup_mnt))
1482                 goto err;
1483
1484         errno = 0;
1485         if (nice(o->nice) == -1 && errno != 0) {
1486                 td_verror(td, errno, "nice");
1487                 goto err;
1488         }
1489
1490         if (o->ioscheduler && switch_ioscheduler(td))
1491                 goto err;
1492
1493         if (!o->create_serialize && setup_files(td))
1494                 goto err;
1495
1496         if (td_io_init(td))
1497                 goto err;
1498
1499         if (init_random_map(td))
1500                 goto err;
1501
1502         if (o->exec_prerun && exec_string(o, o->exec_prerun, (const char *)"prerun"))
1503                 goto err;
1504
1505         if (o->pre_read) {
1506                 if (pre_read_files(td) < 0)
1507                         goto err;
1508         }
1509
1510         if (td->flags & TD_F_COMPRESS_LOG)
1511                 tp_init(&td->tp_data);
1512
1513         fio_verify_init(td);
1514
1515         if ((o->io_submit_mode == IO_MODE_OFFLOAD) &&
1516             workqueue_init(td, &td->io_wq, io_workqueue_fn, td->o.iodepth))
1517                 goto err;
1518
1519         fio_gettime(&td->epoch, NULL);
1520         fio_getrusage(&td->ru_start);
1521         clear_state = 0;
1522         while (keep_running(td)) {
1523                 uint64_t verify_bytes;
1524
1525                 fio_gettime(&td->start, NULL);
1526                 memcpy(&td->bw_sample_time, &td->start, sizeof(td->start));
1527                 memcpy(&td->iops_sample_time, &td->start, sizeof(td->start));
1528                 memcpy(&td->tv_cache, &td->start, sizeof(td->start));
1529
1530                 if (o->ratemin[DDIR_READ] || o->ratemin[DDIR_WRITE] ||
1531                                 o->ratemin[DDIR_TRIM]) {
1532                         memcpy(&td->lastrate[DDIR_READ], &td->bw_sample_time,
1533                                                 sizeof(td->bw_sample_time));
1534                         memcpy(&td->lastrate[DDIR_WRITE], &td->bw_sample_time,
1535                                                 sizeof(td->bw_sample_time));
1536                         memcpy(&td->lastrate[DDIR_TRIM], &td->bw_sample_time,
1537                                                 sizeof(td->bw_sample_time));
1538                 }
1539
1540                 if (clear_state)
1541                         clear_io_state(td);
1542
1543                 prune_io_piece_log(td);
1544
1545                 if (td->o.verify_only && (td_write(td) || td_rw(td)))
1546                         verify_bytes = do_dry_run(td);
1547                 else
1548                         verify_bytes = do_io(td);
1549
1550                 clear_state = 1;
1551
1552                 /*
1553                  * Make sure we've successfully updated the rusage stats
1554                  * before waiting on the stat mutex. Otherwise we could have
1555                  * the stat thread holding stat mutex and waiting for
1556                  * the rusage_sem, which would never get upped because
1557                  * this thread is waiting for the stat mutex.
1558                  */
1559                 check_update_rusage(td);
1560
1561                 fio_mutex_down(stat_mutex);
1562                 if (td_read(td) && td->io_bytes[DDIR_READ])
1563                         update_runtime(td, elapsed_us, DDIR_READ);
1564                 if (td_write(td) && td->io_bytes[DDIR_WRITE])
1565                         update_runtime(td, elapsed_us, DDIR_WRITE);
1566                 if (td_trim(td) && td->io_bytes[DDIR_TRIM])
1567                         update_runtime(td, elapsed_us, DDIR_TRIM);
1568                 fio_gettime(&td->start, NULL);
1569                 fio_mutex_up(stat_mutex);
1570
1571                 if (td->error || td->terminate)
1572                         break;
1573
1574                 if (!o->do_verify ||
1575                     o->verify == VERIFY_NONE ||
1576                     (td->io_ops->flags & FIO_UNIDIR))
1577                         continue;
1578
1579                 clear_io_state(td);
1580
1581                 fio_gettime(&td->start, NULL);
1582
1583                 do_verify(td, verify_bytes);
1584
1585                 /*
1586                  * See comment further up for why this is done here.
1587                  */
1588                 check_update_rusage(td);
1589
1590                 fio_mutex_down(stat_mutex);
1591                 update_runtime(td, elapsed_us, DDIR_READ);
1592                 fio_gettime(&td->start, NULL);
1593                 fio_mutex_up(stat_mutex);
1594
1595                 if (td->error || td->terminate)
1596                         break;
1597         }
1598
1599         update_rusage_stat(td);
1600         td->ts.total_run_time = mtime_since_now(&td->epoch);
1601         td->ts.io_bytes[DDIR_READ] = td->io_bytes[DDIR_READ];
1602         td->ts.io_bytes[DDIR_WRITE] = td->io_bytes[DDIR_WRITE];
1603         td->ts.io_bytes[DDIR_TRIM] = td->io_bytes[DDIR_TRIM];
1604
1605         if (td->o.verify_state_save && !(td->flags & TD_F_VSTATE_SAVED) &&
1606             (td->o.verify != VERIFY_NONE && td_write(td))) {
1607                 struct all_io_list *state;
1608                 size_t sz;
1609
1610                 state = get_all_io_list(td->thread_number, &sz);
1611                 if (state) {
1612                         __verify_save_state(state, "local");
1613                         free(state);
1614                 }
1615         }
1616
1617         fio_unpin_memory(td);
1618
1619         fio_writeout_logs(td);
1620
1621         if (o->io_submit_mode == IO_MODE_OFFLOAD)
1622                 workqueue_exit(&td->io_wq);
1623
1624         if (td->flags & TD_F_COMPRESS_LOG)
1625                 tp_exit(&td->tp_data);
1626
1627         if (o->exec_postrun)
1628                 exec_string(o, o->exec_postrun, (const char *)"postrun");
1629
1630         if (exitall_on_terminate)
1631                 fio_terminate_threads(td->groupid);
1632
1633 err:
1634         if (td->error)
1635                 log_info("fio: pid=%d, err=%d/%s\n", (int) td->pid, td->error,
1636                                                         td->verror);
1637
1638         if (o->verify_async)
1639                 verify_async_exit(td);
1640
1641         close_and_free_files(td);
1642         cleanup_io_u(td);
1643         close_ioengine(td);
1644         cgroup_shutdown(td, &cgroup_mnt);
1645         verify_free_state(td);
1646
1647         if (fio_option_is_set(o, cpumask)) {
1648                 ret = fio_cpuset_exit(&o->cpumask);
1649                 if (ret)
1650                         td_verror(td, ret, "fio_cpuset_exit");
1651         }
1652
1653         /*
1654          * do this very late, it will log file closing as well
1655          */
1656         if (o->write_iolog_file)
1657                 write_iolog_close(td);
1658
1659         fio_mutex_remove(td->mutex);
1660         td->mutex = NULL;
1661
1662         td_set_runstate(td, TD_EXITED);
1663
1664         /*
1665          * Do this last after setting our runstate to exited, so we
1666          * know that the stat thread is signaled.
1667          */
1668         check_update_rusage(td);
1669
1670         return (void *) (uintptr_t) td->error;
1671 }
1672
1673
1674 /*
1675  * We cannot pass the td data into a forked process, so attach the td and
1676  * pass it to the thread worker.
1677  */
1678 static int fork_main(int shmid, int offset)
1679 {
1680         struct thread_data *td;
1681         void *data, *ret;
1682
1683 #if !defined(__hpux) && !defined(CONFIG_NO_SHM)
1684         data = shmat(shmid, NULL, 0);
1685         if (data == (void *) -1) {
1686                 int __err = errno;
1687
1688                 perror("shmat");
1689                 return __err;
1690         }
1691 #else
1692         /*
1693          * HP-UX inherits shm mappings?
1694          */
1695         data = threads;
1696 #endif
1697
1698         td = data + offset * sizeof(struct thread_data);
1699         ret = thread_main(td);
1700         shmdt(data);
1701         return (int) (uintptr_t) ret;
1702 }
1703
1704 static void dump_td_info(struct thread_data *td)
1705 {
1706         log_err("fio: job '%s' hasn't exited in %lu seconds, it appears to "
1707                 "be stuck. Doing forceful exit of this job.\n", td->o.name,
1708                         (unsigned long) time_since_now(&td->terminate_time));
1709 }
1710
1711 /*
1712  * Run over the job map and reap the threads that have exited, if any.
1713  */
1714 static void reap_threads(unsigned int *nr_running, unsigned int *t_rate,
1715                          unsigned int *m_rate)
1716 {
1717         struct thread_data *td;
1718         unsigned int cputhreads, realthreads, pending;
1719         int i, status, ret;
1720
1721         /*
1722          * reap exited threads (TD_EXITED -> TD_REAPED)
1723          */
1724         realthreads = pending = cputhreads = 0;
1725         for_each_td(td, i) {
1726                 int flags = 0;
1727
1728                 /*
1729                  * ->io_ops is NULL for a thread that has closed its
1730                  * io engine
1731                  */
1732                 if (td->io_ops && !strcmp(td->io_ops->name, "cpuio"))
1733                         cputhreads++;
1734                 else
1735                         realthreads++;
1736
1737                 if (!td->pid) {
1738                         pending++;
1739                         continue;
1740                 }
1741                 if (td->runstate == TD_REAPED)
1742                         continue;
1743                 if (td->o.use_thread) {
1744                         if (td->runstate == TD_EXITED) {
1745                                 td_set_runstate(td, TD_REAPED);
1746                                 goto reaped;
1747                         }
1748                         continue;
1749                 }
1750
1751                 flags = WNOHANG;
1752                 if (td->runstate == TD_EXITED)
1753                         flags = 0;
1754
1755                 /*
1756                  * check if someone quit or got killed in an unusual way
1757                  */
1758                 ret = waitpid(td->pid, &status, flags);
1759                 if (ret < 0) {
1760                         if (errno == ECHILD) {
1761                                 log_err("fio: pid=%d disappeared %d\n",
1762                                                 (int) td->pid, td->runstate);
1763                                 td->sig = ECHILD;
1764                                 td_set_runstate(td, TD_REAPED);
1765                                 goto reaped;
1766                         }
1767                         perror("waitpid");
1768                 } else if (ret == td->pid) {
1769                         if (WIFSIGNALED(status)) {
1770                                 int sig = WTERMSIG(status);
1771
1772                                 if (sig != SIGTERM && sig != SIGUSR2)
1773                                         log_err("fio: pid=%d, got signal=%d\n",
1774                                                         (int) td->pid, sig);
1775                                 td->sig = sig;
1776                                 td_set_runstate(td, TD_REAPED);
1777                                 goto reaped;
1778                         }
1779                         if (WIFEXITED(status)) {
1780                                 if (WEXITSTATUS(status) && !td->error)
1781                                         td->error = WEXITSTATUS(status);
1782
1783                                 td_set_runstate(td, TD_REAPED);
1784                                 goto reaped;
1785                         }
1786                 }
1787
1788                 /*
1789                  * If the job is stuck, do a forceful timeout of it and
1790                  * move on.
1791                  */
1792                 if (td->terminate &&
1793                     time_since_now(&td->terminate_time) >= FIO_REAP_TIMEOUT) {
1794                         dump_td_info(td);
1795                         td_set_runstate(td, TD_REAPED);
1796                         goto reaped;
1797                 }
1798
1799                 /*
1800                  * thread is not dead, continue
1801                  */
1802                 pending++;
1803                 continue;
1804 reaped:
1805                 (*nr_running)--;
1806                 (*m_rate) -= ddir_rw_sum(td->o.ratemin);
1807                 (*t_rate) -= ddir_rw_sum(td->o.rate);
1808                 if (!td->pid)
1809                         pending--;
1810
1811                 if (td->error)
1812                         exit_value++;
1813
1814                 done_secs += mtime_since_now(&td->epoch) / 1000;
1815                 profile_td_exit(td);
1816         }
1817
1818         if (*nr_running == cputhreads && !pending && realthreads)
1819                 fio_terminate_threads(TERMINATE_ALL);
1820 }
1821
1822 static int __check_trigger_file(void)
1823 {
1824         struct stat sb;
1825
1826         if (!trigger_file)
1827                 return 0;
1828
1829         if (stat(trigger_file, &sb))
1830                 return 0;
1831
1832         if (unlink(trigger_file) < 0)
1833                 log_err("fio: failed to unlink %s: %s\n", trigger_file,
1834                                                         strerror(errno));
1835
1836         return 1;
1837 }
1838
1839 static int trigger_timedout(void)
1840 {
1841         if (trigger_timeout)
1842                 return time_since_genesis() >= trigger_timeout;
1843
1844         return 0;
1845 }
1846
1847 void exec_trigger(const char *cmd)
1848 {
1849         int ret;
1850
1851         if (!cmd)
1852                 return;
1853
1854         ret = system(cmd);
1855         if (ret == -1)
1856                 log_err("fio: failed executing %s trigger\n", cmd);
1857 }
1858
1859 void check_trigger_file(void)
1860 {
1861         if (__check_trigger_file() || trigger_timedout()) {
1862                 if (nr_clients)
1863                         fio_clients_send_trigger(trigger_remote_cmd);
1864                 else {
1865                         verify_save_state();
1866                         fio_terminate_threads(TERMINATE_ALL);
1867                         exec_trigger(trigger_cmd);
1868                 }
1869         }
1870 }
1871
1872 static int fio_verify_load_state(struct thread_data *td)
1873 {
1874         int ret;
1875
1876         if (!td->o.verify_state)
1877                 return 0;
1878
1879         if (is_backend) {
1880                 void *data;
1881
1882                 ret = fio_server_get_verify_state(td->o.name,
1883                                         td->thread_number - 1, &data);
1884                 if (!ret)
1885                         verify_convert_assign_state(td, data);
1886         } else
1887                 ret = verify_load_state(td, "local");
1888
1889         return ret;
1890 }
1891
1892 static void do_usleep(unsigned int usecs)
1893 {
1894         check_for_running_stats();
1895         check_trigger_file();
1896         usleep(usecs);
1897 }
1898
1899 static int check_mount_writes(struct thread_data *td)
1900 {
1901         struct fio_file *f;
1902         unsigned int i;
1903
1904         if (!td_write(td) || td->o.allow_mounted_write)
1905                 return 0;
1906
1907         for_each_file(td, f, i) {
1908                 if (f->filetype != FIO_TYPE_BD)
1909                         continue;
1910                 if (device_is_mounted(f->file_name))
1911                         goto mounted;
1912         }
1913
1914         return 0;
1915 mounted:
1916         log_err("fio: %s appears mounted, and 'allow_mounted_write' isn't set. Aborting.", f->file_name);
1917         return 1;
1918 }
1919
1920 /*
1921  * Main function for kicking off and reaping jobs, as needed.
1922  */
1923 static void run_threads(void)
1924 {
1925         struct thread_data *td;
1926         unsigned int i, todo, nr_running, m_rate, t_rate, nr_started;
1927         uint64_t spent;
1928
1929         if (fio_gtod_offload && fio_start_gtod_thread())
1930                 return;
1931
1932         fio_idle_prof_init();
1933
1934         set_sig_handlers();
1935
1936         nr_thread = nr_process = 0;
1937         for_each_td(td, i) {
1938                 if (check_mount_writes(td))
1939                         return;
1940                 if (td->o.use_thread)
1941                         nr_thread++;
1942                 else
1943                         nr_process++;
1944         }
1945
1946         if (output_format == FIO_OUTPUT_NORMAL) {
1947                 log_info("Starting ");
1948                 if (nr_thread)
1949                         log_info("%d thread%s", nr_thread,
1950                                                 nr_thread > 1 ? "s" : "");
1951                 if (nr_process) {
1952                         if (nr_thread)
1953                                 log_info(" and ");
1954                         log_info("%d process%s", nr_process,
1955                                                 nr_process > 1 ? "es" : "");
1956                 }
1957                 log_info("\n");
1958                 log_info_flush();
1959         }
1960
1961         todo = thread_number;
1962         nr_running = 0;
1963         nr_started = 0;
1964         m_rate = t_rate = 0;
1965
1966         for_each_td(td, i) {
1967                 print_status_init(td->thread_number - 1);
1968
1969                 if (!td->o.create_serialize)
1970                         continue;
1971
1972                 if (fio_verify_load_state(td))
1973                         goto reap;
1974
1975                 /*
1976                  * do file setup here so it happens sequentially,
1977                  * we don't want X number of threads getting their
1978                  * client data interspersed on disk
1979                  */
1980                 if (setup_files(td)) {
1981 reap:
1982                         exit_value++;
1983                         if (td->error)
1984                                 log_err("fio: pid=%d, err=%d/%s\n",
1985                                         (int) td->pid, td->error, td->verror);
1986                         td_set_runstate(td, TD_REAPED);
1987                         todo--;
1988                 } else {
1989                         struct fio_file *f;
1990                         unsigned int j;
1991
1992                         /*
1993                          * for sharing to work, each job must always open
1994                          * its own files. so close them, if we opened them
1995                          * for creation
1996                          */
1997                         for_each_file(td, f, j) {
1998                                 if (fio_file_open(f))
1999                                         td_io_close_file(td, f);
2000                         }
2001                 }
2002         }
2003
2004         /* start idle threads before io threads start to run */
2005         fio_idle_prof_start();
2006
2007         set_genesis_time();
2008
2009         while (todo) {
2010                 struct thread_data *map[REAL_MAX_JOBS];
2011                 struct timeval this_start;
2012                 int this_jobs = 0, left;
2013
2014                 /*
2015                  * create threads (TD_NOT_CREATED -> TD_CREATED)
2016                  */
2017                 for_each_td(td, i) {
2018                         if (td->runstate != TD_NOT_CREATED)
2019                                 continue;
2020
2021                         /*
2022                          * never got a chance to start, killed by other
2023                          * thread for some reason
2024                          */
2025                         if (td->terminate) {
2026                                 todo--;
2027                                 continue;
2028                         }
2029
2030                         if (td->o.start_delay) {
2031                                 spent = utime_since_genesis();
2032
2033                                 if (td->o.start_delay > spent)
2034                                         continue;
2035                         }
2036
2037                         if (td->o.stonewall && (nr_started || nr_running)) {
2038                                 dprint(FD_PROCESS, "%s: stonewall wait\n",
2039                                                         td->o.name);
2040                                 break;
2041                         }
2042
2043                         init_disk_util(td);
2044
2045                         td->rusage_sem = fio_mutex_init(FIO_MUTEX_LOCKED);
2046                         td->update_rusage = 0;
2047
2048                         /*
2049                          * Set state to created. Thread will transition
2050                          * to TD_INITIALIZED when it's done setting up.
2051                          */
2052                         td_set_runstate(td, TD_CREATED);
2053                         map[this_jobs++] = td;
2054                         nr_started++;
2055
2056                         if (td->o.use_thread) {
2057                                 int ret;
2058
2059                                 dprint(FD_PROCESS, "will pthread_create\n");
2060                                 ret = pthread_create(&td->thread, NULL,
2061                                                         thread_main, td);
2062                                 if (ret) {
2063                                         log_err("pthread_create: %s\n",
2064                                                         strerror(ret));
2065                                         nr_started--;
2066                                         break;
2067                                 }
2068                                 ret = pthread_detach(td->thread);
2069                                 if (ret)
2070                                         log_err("pthread_detach: %s",
2071                                                         strerror(ret));
2072                         } else {
2073                                 pid_t pid;
2074                                 dprint(FD_PROCESS, "will fork\n");
2075                                 pid = fork();
2076                                 if (!pid) {
2077                                         int ret = fork_main(shm_id, i);
2078
2079                                         _exit(ret);
2080                                 } else if (i == fio_debug_jobno)
2081                                         *fio_debug_jobp = pid;
2082                         }
2083                         dprint(FD_MUTEX, "wait on startup_mutex\n");
2084                         if (fio_mutex_down_timeout(startup_mutex, 10)) {
2085                                 log_err("fio: job startup hung? exiting.\n");
2086                                 fio_terminate_threads(TERMINATE_ALL);
2087                                 fio_abort = 1;
2088                                 nr_started--;
2089                                 break;
2090                         }
2091                         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
2092                 }
2093
2094                 /*
2095                  * Wait for the started threads to transition to
2096                  * TD_INITIALIZED.
2097                  */
2098                 fio_gettime(&this_start, NULL);
2099                 left = this_jobs;
2100                 while (left && !fio_abort) {
2101                         if (mtime_since_now(&this_start) > JOB_START_TIMEOUT)
2102                                 break;
2103
2104                         do_usleep(100000);
2105
2106                         for (i = 0; i < this_jobs; i++) {
2107                                 td = map[i];
2108                                 if (!td)
2109                                         continue;
2110                                 if (td->runstate == TD_INITIALIZED) {
2111                                         map[i] = NULL;
2112                                         left--;
2113                                 } else if (td->runstate >= TD_EXITED) {
2114                                         map[i] = NULL;
2115                                         left--;
2116                                         todo--;
2117                                         nr_running++; /* work-around... */
2118                                 }
2119                         }
2120                 }
2121
2122                 if (left) {
2123                         log_err("fio: %d job%s failed to start\n", left,
2124                                         left > 1 ? "s" : "");
2125                         for (i = 0; i < this_jobs; i++) {
2126                                 td = map[i];
2127                                 if (!td)
2128                                         continue;
2129                                 kill(td->pid, SIGTERM);
2130                         }
2131                         break;
2132                 }
2133
2134                 /*
2135                  * start created threads (TD_INITIALIZED -> TD_RUNNING).
2136                  */
2137                 for_each_td(td, i) {
2138                         if (td->runstate != TD_INITIALIZED)
2139                                 continue;
2140
2141                         if (in_ramp_time(td))
2142                                 td_set_runstate(td, TD_RAMP);
2143                         else
2144                                 td_set_runstate(td, TD_RUNNING);
2145                         nr_running++;
2146                         nr_started--;
2147                         m_rate += ddir_rw_sum(td->o.ratemin);
2148                         t_rate += ddir_rw_sum(td->o.rate);
2149                         todo--;
2150                         fio_mutex_up(td->mutex);
2151                 }
2152
2153                 reap_threads(&nr_running, &t_rate, &m_rate);
2154
2155                 if (todo)
2156                         do_usleep(100000);
2157         }
2158
2159         while (nr_running) {
2160                 reap_threads(&nr_running, &t_rate, &m_rate);
2161                 do_usleep(10000);
2162         }
2163
2164         fio_idle_prof_stop();
2165
2166         update_io_ticks();
2167 }
2168
2169 static void wait_for_helper_thread_exit(void)
2170 {
2171         void *ret;
2172
2173         helper_exit = 1;
2174         pthread_cond_signal(&helper_cond);
2175         pthread_join(helper_thread, &ret);
2176 }
2177
2178 static void free_disk_util(void)
2179 {
2180         disk_util_prune_entries();
2181
2182         pthread_cond_destroy(&helper_cond);
2183 }
2184
2185 static void *helper_thread_main(void *data)
2186 {
2187         int ret = 0;
2188
2189         fio_mutex_up(startup_mutex);
2190
2191         while (!ret) {
2192                 uint64_t sec = DISK_UTIL_MSEC / 1000;
2193                 uint64_t nsec = (DISK_UTIL_MSEC % 1000) * 1000000;
2194                 struct timespec ts;
2195                 struct timeval tv;
2196
2197                 gettimeofday(&tv, NULL);
2198                 ts.tv_sec = tv.tv_sec + sec;
2199                 ts.tv_nsec = (tv.tv_usec * 1000) + nsec;
2200
2201                 if (ts.tv_nsec >= 1000000000ULL) {
2202                         ts.tv_nsec -= 1000000000ULL;
2203                         ts.tv_sec++;
2204                 }
2205
2206                 pthread_cond_timedwait(&helper_cond, &helper_lock, &ts);
2207
2208                 ret = update_io_ticks();
2209
2210                 if (helper_do_stat) {
2211                         helper_do_stat = 0;
2212                         __show_running_run_stats();
2213                 }
2214
2215                 if (!is_backend)
2216                         print_thread_status();
2217         }
2218
2219         return NULL;
2220 }
2221
2222 static int create_helper_thread(void)
2223 {
2224         int ret;
2225
2226         setup_disk_util();
2227
2228         pthread_cond_init(&helper_cond, NULL);
2229         pthread_mutex_init(&helper_lock, NULL);
2230
2231         ret = pthread_create(&helper_thread, NULL, helper_thread_main, NULL);
2232         if (ret) {
2233                 log_err("Can't create helper thread: %s\n", strerror(ret));
2234                 return 1;
2235         }
2236
2237         dprint(FD_MUTEX, "wait on startup_mutex\n");
2238         fio_mutex_down(startup_mutex);
2239         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
2240         return 0;
2241 }
2242
2243 int fio_backend(void)
2244 {
2245         struct thread_data *td;
2246         int i;
2247
2248         if (exec_profile) {
2249                 if (load_profile(exec_profile))
2250                         return 1;
2251                 free(exec_profile);
2252                 exec_profile = NULL;
2253         }
2254         if (!thread_number)
2255                 return 0;
2256
2257         if (write_bw_log) {
2258                 struct log_params p = {
2259                         .log_type = IO_LOG_TYPE_BW,
2260                 };
2261
2262                 setup_log(&agg_io_log[DDIR_READ], &p, "agg-read_bw.log");
2263                 setup_log(&agg_io_log[DDIR_WRITE], &p, "agg-write_bw.log");
2264                 setup_log(&agg_io_log[DDIR_TRIM], &p, "agg-trim_bw.log");
2265         }
2266
2267         startup_mutex = fio_mutex_init(FIO_MUTEX_LOCKED);
2268         if (startup_mutex == NULL)
2269                 return 1;
2270
2271         set_genesis_time();
2272         stat_init();
2273         create_helper_thread();
2274
2275         cgroup_list = smalloc(sizeof(*cgroup_list));
2276         INIT_FLIST_HEAD(cgroup_list);
2277
2278         run_threads();
2279
2280         wait_for_helper_thread_exit();
2281
2282         if (!fio_abort) {
2283                 __show_run_stats();
2284                 if (write_bw_log) {
2285                         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
2286                                 struct io_log *log = agg_io_log[i];
2287
2288                                 flush_log(log, 0);
2289                                 free_log(log);
2290                         }
2291                 }
2292         }
2293
2294         for_each_td(td, i) {
2295                 fio_options_free(td);
2296                 if (td->rusage_sem) {
2297                         fio_mutex_remove(td->rusage_sem);
2298                         td->rusage_sem = NULL;
2299                 }
2300         }
2301
2302         free_disk_util();
2303         cgroup_kill(cgroup_list);
2304         sfree(cgroup_list);
2305         sfree(cgroup_mnt);
2306
2307         fio_mutex_remove(startup_mutex);
2308         stat_exit();
2309         return exit_value;
2310 }