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