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 <time.h>
  32 #include <sys/stat.h>
  33 #include <sys/wait.h>
  34 #include <sys/ipc.h>
  35 #include <sys/shm.h>
  36 #include <sys/mman.h>
  37
  38 #include "fio.h"
  39 #include "hash.h"
  40 #include "smalloc.h"
  41 #include "verify.h"
  42 #include "trim.h"
  43 #include "diskutil.h"
  44 #include "cgroup.h"
  45 #include "profile.h"
  46 #include "lib/rand.h"
  47
  48 unsigned long page_mask;
  49 unsigned long page_size;
  50
  51 #define PAGE_ALIGN(buf) \
  52         (char *) (((unsigned long) (buf) + page_mask) & ~page_mask)
  53
  54 int groupid = 0;
  55 int thread_number = 0;
  56 int nr_process = 0;
  57 int nr_thread = 0;
  58 int shm_id = 0;
  59 int temp_stall_ts;
  60 unsigned long done_secs = 0;
  61
  62 static struct fio_mutex *startup_mutex;
  63 static struct fio_mutex *writeout_mutex;
  64 static volatile int fio_abort;
  65 static int exit_value;
  66 static timer_t ival_timer;
  67 static pthread_t gtod_thread;
  68 static struct flist_head *cgroup_list;
  69 static char *cgroup_mnt;
  70
  71 struct io_log *agg_io_log[2];
  72
  73 #define TERMINATE_ALL           (-1)
  74 #define JOB_START_TIMEOUT       (5 * 1000)
  75
  76 void td_set_runstate(struct thread_data *td, int runstate)
  77 {
  78         if (td->runstate == runstate)
  79                 return;
  80
  81         dprint(FD_PROCESS, "pid=%d: runstate %d -> %d\n", (int) td->pid,
  82                                                 td->runstate, runstate);
  83         td->runstate = runstate;
  84 }
  85
  86 static void terminate_threads(int group_id)
  87 {
  88         struct thread_data *td;
  89         int i;
  90
  91         dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
  92
  93         for_each_td(td, i) {
  94                 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
  95                         dprint(FD_PROCESS, "setting terminate on %s/%d\n",
  96                                                 td->o.name, (int) td->pid);
  97                         td->terminate = 1;
  98                         td->o.start_delay = 0;
  99
 100                         /*
 101                          * if the thread is running, just let it exit
 102                          */
 103                         if (td->runstate < TD_RUNNING)
 104                                 kill(td->pid, SIGQUIT);
 105                         else {
 106                                 struct ioengine_ops *ops = td->io_ops;
 107
 108                                 if (ops && (ops->flags & FIO_SIGQUIT))
 109                                         kill(td->pid, SIGQUIT);
 110                         }
 111                 }
 112         }
 113 }
 114
 115 static void status_timer_arm(void)
 116 {
 117         struct itimerspec value;
 118
 119         value.it_value.tv_sec = 0;
 120         value.it_value.tv_nsec = DISK_UTIL_MSEC * 1000000;
 121         value.it_interval.tv_sec = 0;
 122         value.it_interval.tv_nsec = DISK_UTIL_MSEC * 1000000;
 123
 124         timer_settime(ival_timer, 0, &value, NULL);
 125 }
 126
 127 static void ival_fn(union sigval sig)
 128 {
 129         if (threads) {
 130                 update_io_ticks();
 131                 print_thread_status();
 132         }
 133 }
 134
 135 /*
 136  * Happens on thread runs with ctrl-c, ignore our own SIGQUIT
 137  */
 138 static void sig_quit(int sig)
 139 {
 140 }
 141
 142 static void sig_int(int sig)
 143 {
 144         if (threads) {
 145                 log_info("\nfio: terminating on signal %d\n", sig);
 146                 fflush(stdout);
 147                 terminate_threads(TERMINATE_ALL);
 148         }
 149 }
 150
 151 static void posix_timer_teardown(void)
 152 {
 153         timer_delete(ival_timer);
 154 }
 155
 156 static void posix_timer_setup(void)
 157 {
 158         struct sigevent evt;
 159
 160         memset(&evt, 0, sizeof(evt));
 161         evt.sigev_notify = SIGEV_THREAD;
 162         evt.sigev_notify_function = ival_fn;
 163
 164         if (timer_create(CLOCK_MONOTONIC, &evt, &ival_timer) < 0)
 165                 perror("timer_create");
 166 }
 167
 168 static void set_sig_handlers(void)
 169 {
 170         struct sigaction act;
 171
 172         memset(&act, 0, sizeof(act));
 173         act.sa_handler = sig_int;
 174         act.sa_flags = SA_RESTART;
 175         sigaction(SIGINT, &act, NULL);
 176
 177         memset(&act, 0, sizeof(act));
 178         act.sa_handler = sig_quit;
 179         act.sa_flags = SA_RESTART;
 180         sigaction(SIGQUIT, &act, NULL);
 181 }
 182
 183 /*
 184  * Check if we are above the minimum rate given.
 185  */
 186 static int __check_min_rate(struct thread_data *td, struct timeval *now,
 187                             enum td_ddir ddir)
 188 {
 189         unsigned long long bytes = 0;
 190         unsigned long iops = 0;
 191         unsigned long spent;
 192         unsigned long rate;
 193         unsigned int ratemin = 0;
 194         unsigned int rate_iops = 0;
 195         unsigned int rate_iops_min = 0;
 196
 197         assert(ddir_rw(ddir));
 198
 199         if (!td->o.ratemin[ddir] && !td->o.rate_iops_min[ddir])
 200                 return 0;
 201
 202         /*
 203          * allow a 2 second settle period in the beginning
 204          */
 205         if (mtime_since(&td->start, now) < 2000)
 206                 return 0;
 207
 208         iops += td->io_blocks[ddir];
 209         bytes += td->this_io_bytes[ddir];
 210         ratemin += td->o.ratemin[ddir];
 211         rate_iops += td->o.rate_iops[ddir];
 212         rate_iops_min += td->o.rate_iops_min[ddir];
 213
 214         /*
 215          * if rate blocks is set, sample is running
 216          */
 217         if (td->rate_bytes[ddir] || td->rate_blocks[ddir]) {
 218                 spent = mtime_since(&td->lastrate[ddir], now);
 219                 if (spent < td->o.ratecycle)
 220                         return 0;
 221
 222                 if (td->o.rate[ddir]) {
 223                         /*
 224                          * check bandwidth specified rate
 225                          */
 226                         if (bytes < td->rate_bytes[ddir]) {
 227                                 log_err("%s: min rate %u not met\n", td->o.name,
 228                                                                 ratemin);
 229                                 return 1;
 230                         } else {
 231                                 rate = ((bytes - td->rate_bytes[ddir]) * 1000) / spent;
 232                                 if (rate < ratemin ||
 233                                     bytes < td->rate_bytes[ddir]) {
 234                                         log_err("%s: min rate %u not met, got"
 235                                                 " %luKB/sec\n", td->o.name,
 236                                                         ratemin, rate);
 237                                         return 1;
 238                                 }
 239                         }
 240                 } else {
 241                         /*
 242                          * checks iops specified rate
 243                          */
 244                         if (iops < rate_iops) {
 245                                 log_err("%s: min iops rate %u not met\n",
 246                                                 td->o.name, rate_iops);
 247                                 return 1;
 248                         } else {
 249                                 rate = ((iops - td->rate_blocks[ddir]) * 1000) / spent;
 250                                 if (rate < rate_iops_min ||
 251                                     iops < td->rate_blocks[ddir]) {
 252                                         log_err("%s: min iops rate %u not met,"
 253                                                 " got %lu\n", td->o.name,
 254                                                         rate_iops_min, rate);
 255                                 }
 256                         }
 257                 }
 258         }
 259
 260         td->rate_bytes[ddir] = bytes;
 261         td->rate_blocks[ddir] = iops;
 262         memcpy(&td->lastrate[ddir], now, sizeof(*now));
 263         return 0;
 264 }
 265
 266 static int check_min_rate(struct thread_data *td, struct timeval *now,
 267                           unsigned long *bytes_done)
 268 {
 269         int ret = 0;
 270
 271         if (bytes_done[0])
 272                 ret |= __check_min_rate(td, now, 0);
 273         if (bytes_done[1])
 274                 ret |= __check_min_rate(td, now, 1);
 275
 276         return ret;
 277 }
 278
 279 static inline int runtime_exceeded(struct thread_data *td, struct timeval *t)
 280 {
 281         if (!td->o.timeout)
 282                 return 0;
 283         if (mtime_since(&td->epoch, t) >= td->o.timeout * 1000)
 284                 return 1;
 285
 286         return 0;
 287 }
 288
 289 /*
 290  * When job exits, we can cancel the in-flight IO if we are using async
 291  * io. Attempt to do so.
 292  */
 293 static void cleanup_pending_aio(struct thread_data *td)
 294 {
 295         struct flist_head *entry, *n;
 296         struct io_u *io_u;
 297         int r;
 298
 299         /*
 300          * get immediately available events, if any
 301          */
 302         r = io_u_queued_complete(td, 0, NULL);
 303         if (r < 0)
 304                 return;
 305
 306         /*
 307          * now cancel remaining active events
 308          */
 309         if (td->io_ops->cancel) {
 310                 flist_for_each_safe(entry, n, &td->io_u_busylist) {
 311                         io_u = flist_entry(entry, struct io_u, list);
 312
 313                         /*
 314                          * if the io_u isn't in flight, then that generally
 315                          * means someone leaked an io_u. complain but fix
 316                          * it up, so we don't stall here.
 317                          */
 318                         if ((io_u->flags & IO_U_F_FLIGHT) == 0) {
 319                                 log_err("fio: non-busy IO on busy list\n");
 320                                 put_io_u(td, io_u);
 321                         } else {
 322                                 r = td->io_ops->cancel(td, io_u);
 323                                 if (!r)
 324                                         put_io_u(td, io_u);
 325                         }
 326                 }
 327         }
 328
 329         if (td->cur_depth)
 330                 r = io_u_queued_complete(td, td->cur_depth, NULL);
 331 }
 332
 333 /*
 334  * Helper to handle the final sync of a file. Works just like the normal
 335  * io path, just does everything sync.
 336  */
 337 static int fio_io_sync(struct thread_data *td, struct fio_file *f)
 338 {
 339         struct io_u *io_u = __get_io_u(td);
 340         int ret;
 341
 342         if (!io_u)
 343                 return 1;
 344
 345         io_u->ddir = DDIR_SYNC;
 346         io_u->file = f;
 347
 348         if (td_io_prep(td, io_u)) {
 349                 put_io_u(td, io_u);
 350                 return 1;
 351         }
 352
 353 requeue:
 354         ret = td_io_queue(td, io_u);
 355         if (ret < 0) {
 356                 td_verror(td, io_u->error, "td_io_queue");
 357                 put_io_u(td, io_u);
 358                 return 1;
 359         } else if (ret == FIO_Q_QUEUED) {
 360                 if (io_u_queued_complete(td, 1, NULL) < 0)
 361                         return 1;
 362         } else if (ret == FIO_Q_COMPLETED) {
 363                 if (io_u->error) {
 364                         td_verror(td, io_u->error, "td_io_queue");
 365                         return 1;
 366                 }
 367
 368                 if (io_u_sync_complete(td, io_u, NULL) < 0)
 369                         return 1;
 370         } else if (ret == FIO_Q_BUSY) {
 371                 if (td_io_commit(td))
 372                         return 1;
 373                 goto requeue;
 374         }
 375
 376         return 0;
 377 }
 378
 379 static inline void update_tv_cache(struct thread_data *td)
 380 {
 381         if ((++td->tv_cache_nr & td->tv_cache_mask) == td->tv_cache_mask)
 382                 fio_gettime(&td->tv_cache, NULL);
 383 }
 384
 385 static int break_on_this_error(struct thread_data *td, int *retptr)
 386 {
 387         int ret = *retptr;
 388
 389         if (ret < 0 || td->error) {
 390                 int err;
 391
 392                 if (!td->o.continue_on_error)
 393                         return 1;
 394
 395                 if (ret < 0)
 396                         err = -ret;
 397                 else
 398                         err = td->error;
 399
 400                 if (td_non_fatal_error(err)) {
 401                         /*
 402                          * Continue with the I/Os in case of
 403                          * a non fatal error.
 404                          */
 405                         update_error_count(td, err);
 406                         td_clear_error(td);
 407                         *retptr = 0;
 408                         return 0;
 409                 } else if (td->o.fill_device && err == ENOSPC) {
 410                         /*
 411                          * We expect to hit this error if
 412                          * fill_device option is set.
 413                          */
 414                         td_clear_error(td);
 415                         td->terminate = 1;
 416                         return 1;
 417                 } else {
 418                         /*
 419                          * Stop the I/O in case of a fatal
 420                          * error.
 421                          */
 422                         update_error_count(td, err);
 423                         return 1;
 424                 }
 425         }
 426
 427         return 0;
 428 }
 429
 430 /*
 431  * The main verify engine. Runs over the writes we previously submitted,
 432  * reads the blocks back in, and checks the crc/md5 of the data.
 433  */
 434 static void do_verify(struct thread_data *td)
 435 {
 436         struct fio_file *f;
 437         struct io_u *io_u;
 438         int ret, min_events;
 439         unsigned int i;
 440
 441         dprint(FD_VERIFY, "starting loop\n");
 442
 443         /*
 444          * sync io first and invalidate cache, to make sure we really
 445          * read from disk.
 446          */
 447         for_each_file(td, f, i) {
 448                 if (!fio_file_open(f))
 449                         continue;
 450                 if (fio_io_sync(td, f))
 451                         break;
 452                 if (file_invalidate_cache(td, f))
 453                         break;
 454         }
 455
 456         if (td->error)
 457                 return;
 458
 459         td_set_runstate(td, TD_VERIFYING);
 460
 461         io_u = NULL;
 462         while (!td->terminate) {
 463                 int ret2, full;
 464
 465                 update_tv_cache(td);
 466
 467                 if (runtime_exceeded(td, &td->tv_cache)) {
 468                         td->terminate = 1;
 469                         break;
 470                 }
 471
 472                 io_u = __get_io_u(td);
 473                 if (!io_u)
 474                         break;
 475
 476                 if (get_next_verify(td, io_u)) {
 477                         put_io_u(td, io_u);
 478                         break;
 479                 }
 480
 481                 if (td_io_prep(td, io_u)) {
 482                         put_io_u(td, io_u);
 483                         break;
 484                 }
 485
 486                 if (td->o.verify_async)
 487                         io_u->end_io = verify_io_u_async;
 488                 else
 489                         io_u->end_io = verify_io_u;
 490
 491                 ret = td_io_queue(td, io_u);
 492                 switch (ret) {
 493                 case FIO_Q_COMPLETED:
 494                         if (io_u->error) {
 495                                 ret = -io_u->error;
 496                                 clear_io_u(td, io_u);
 497                         } else if (io_u->resid) {
 498                                 int bytes = io_u->xfer_buflen - io_u->resid;
 499                                 struct fio_file *f = io_u->file;
 500
 501                                 /*
 502                                  * zero read, fail
 503                                  */
 504                                 if (!bytes) {
 505                                         td_verror(td, EIO, "full resid");
 506                                         put_io_u(td, io_u);
 507                                         break;
 508                                 }
 509
 510                                 io_u->xfer_buflen = io_u->resid;
 511                                 io_u->xfer_buf += bytes;
 512                                 io_u->offset += bytes;
 513
 514                                 if (ddir_rw(io_u->ddir))
 515                                         td->ts.short_io_u[io_u->ddir]++;
 516
 517                                 if (io_u->offset == f->real_file_size)
 518                                         goto sync_done;
 519
 520                                 requeue_io_u(td, &io_u);
 521                         } else {
 522 sync_done:
 523                                 ret = io_u_sync_complete(td, io_u, NULL);
 524                                 if (ret < 0)
 525                                         break;
 526                         }
 527                         continue;
 528                 case FIO_Q_QUEUED:
 529                         break;
 530                 case FIO_Q_BUSY:
 531                         requeue_io_u(td, &io_u);
 532                         ret2 = td_io_commit(td);
 533                         if (ret2 < 0)
 534                                 ret = ret2;
 535                         break;
 536                 default:
 537                         assert(ret < 0);
 538                         td_verror(td, -ret, "td_io_queue");
 539                         break;
 540                 }
 541
 542                 if (break_on_this_error(td, &ret))
 543                         break;
 544
 545                 /*
 546                  * if we can queue more, do so. but check if there are
 547                  * completed io_u's first.
 548                  */
 549                 full = queue_full(td) || ret == FIO_Q_BUSY;
 550                 if (full || !td->o.iodepth_batch_complete) {
 551                         min_events = min(td->o.iodepth_batch_complete,
 552                                          td->cur_depth);
 553                         if (full && !min_events)
 554                                 min_events = 1;
 555
 556                         do {
 557                                 /*
 558                                  * Reap required number of io units, if any,
 559                                  * and do the verification on them through
 560                                  * the callback handler
 561                                  */
 562                                 if (io_u_queued_complete(td, min_events, NULL) < 0) {
 563                                         ret = -1;
 564                                         break;
 565                                 }
 566                         } while (full && (td->cur_depth > td->o.iodepth_low));
 567                 }
 568                 if (ret < 0)
 569                         break;
 570         }
 571
 572         if (!td->error) {
 573                 min_events = td->cur_depth;
 574
 575                 if (min_events)
 576                         ret = io_u_queued_complete(td, min_events, NULL);
 577         } else
 578                 cleanup_pending_aio(td);
 579
 580         td_set_runstate(td, TD_RUNNING);
 581
 582         dprint(FD_VERIFY, "exiting loop\n");
 583 }
 584
 585 /*
 586  * Main IO worker function. It retrieves io_u's to process and queues
 587  * and reaps them, checking for rate and errors along the way.
 588  */
 589 static void do_io(struct thread_data *td)
 590 {
 591         unsigned int i;
 592         int ret = 0;
 593
 594         if (in_ramp_time(td))
 595                 td_set_runstate(td, TD_RAMP);
 596         else
 597                 td_set_runstate(td, TD_RUNNING);
 598
 599         while ( (td->o.read_iolog_file && !flist_empty(&td->io_log_list)) ||
 600                 (!flist_empty(&td->trim_list)) ||
 601                 ((td->this_io_bytes[0] + td->this_io_bytes[1]) < td->o.size) ) {
 602                 struct timeval comp_time;
 603                 unsigned long bytes_done[2] = { 0, 0 };
 604                 int min_evts = 0;
 605                 struct io_u *io_u;
 606                 int ret2, full;
 607
 608                 if (td->terminate)
 609                         break;
 610
 611                 update_tv_cache(td);
 612
 613                 if (runtime_exceeded(td, &td->tv_cache)) {
 614                         td->terminate = 1;
 615                         break;
 616                 }
 617
 618                 io_u = get_io_u(td);
 619                 if (!io_u)
 620                         break;
 621
 622                 /*
 623                  * Add verification end_io handler, if asked to verify
 624                  * a previously written file.
 625                  */
 626                 if (td->o.verify != VERIFY_NONE && io_u->ddir == DDIR_READ &&
 627                     !td_rw(td)) {
 628                         if (td->o.verify_async)
 629                                 io_u->end_io = verify_io_u_async;
 630                         else
 631                                 io_u->end_io = verify_io_u;
 632                         td_set_runstate(td, TD_VERIFYING);
 633                 } else if (in_ramp_time(td))
 634                         td_set_runstate(td, TD_RAMP);
 635                 else
 636                         td_set_runstate(td, TD_RUNNING);
 637
 638                 ret = td_io_queue(td, io_u);
 639                 switch (ret) {
 640                 case FIO_Q_COMPLETED:
 641                         if (io_u->error) {
 642                                 ret = -io_u->error;
 643                                 clear_io_u(td, io_u);
 644                         } else if (io_u->resid) {
 645                                 int bytes = io_u->xfer_buflen - io_u->resid;
 646                                 struct fio_file *f = io_u->file;
 647
 648                                 /*
 649                                  * zero read, fail
 650                                  */
 651                                 if (!bytes) {
 652                                         td_verror(td, EIO, "full resid");
 653                                         put_io_u(td, io_u);
 654                                         break;
 655                                 }
 656
 657                                 io_u->xfer_buflen = io_u->resid;
 658                                 io_u->xfer_buf += bytes;
 659                                 io_u->offset += bytes;
 660
 661                                 if (ddir_rw(io_u->ddir))
 662                                         td->ts.short_io_u[io_u->ddir]++;
 663
 664                                 if (io_u->offset == f->real_file_size)
 665                                         goto sync_done;
 666
 667                                 requeue_io_u(td, &io_u);
 668                         } else {
 669 sync_done:
 670                                 if (__should_check_rate(td, 0) ||
 671                                     __should_check_rate(td, 1))
 672                                         fio_gettime(&comp_time, NULL);
 673
 674                                 ret = io_u_sync_complete(td, io_u, bytes_done);
 675                                 if (ret < 0)
 676                                         break;
 677                         }
 678                         break;
 679                 case FIO_Q_QUEUED:
 680                         /*
 681                          * if the engine doesn't have a commit hook,
 682                          * the io_u is really queued. if it does have such
 683                          * a hook, it has to call io_u_queued() itself.
 684                          */
 685                         if (td->io_ops->commit == NULL)
 686                                 io_u_queued(td, io_u);
 687                         break;
 688                 case FIO_Q_BUSY:
 689                         requeue_io_u(td, &io_u);
 690                         ret2 = td_io_commit(td);
 691                         if (ret2 < 0)
 692                                 ret = ret2;
 693                         break;
 694                 default:
 695                         assert(ret < 0);
 696                         put_io_u(td, io_u);
 697                         break;
 698                 }
 699
 700                 if (break_on_this_error(td, &ret))
 701                         break;
 702
 703                 /*
 704                  * See if we need to complete some commands
 705                  */
 706                 full = queue_full(td) || ret == FIO_Q_BUSY;
 707                 if (full || !td->o.iodepth_batch_complete) {
 708                         min_evts = min(td->o.iodepth_batch_complete,
 709                                         td->cur_depth);
 710                         if (full && !min_evts)
 711                                 min_evts = 1;
 712
 713                         if (__should_check_rate(td, 0) ||
 714                             __should_check_rate(td, 1))
 715                                 fio_gettime(&comp_time, NULL);
 716
 717                         do {
 718                                 ret = io_u_queued_complete(td, min_evts, bytes_done);
 719                                 if (ret < 0)
 720                                         break;
 721
 722                         } while (full && (td->cur_depth > td->o.iodepth_low));
 723                 }
 724
 725                 if (ret < 0)
 726                         break;
 727                 if (!(bytes_done[0] + bytes_done[1]))
 728                         continue;
 729
 730                 if (!in_ramp_time(td) && should_check_rate(td, bytes_done)) {
 731                         if (check_min_rate(td, &comp_time, bytes_done)) {
 732                                 if (exitall_on_terminate)
 733                                         terminate_threads(td->groupid);
 734                                 td_verror(td, EIO, "check_min_rate");
 735                                 break;
 736                         }
 737                 }
 738
 739                 if (td->o.thinktime) {
 740                         unsigned long long b;
 741
 742                         b = td->io_blocks[0] + td->io_blocks[1];
 743                         if (!(b % td->o.thinktime_blocks)) {
 744                                 int left;
 745
 746                                 if (td->o.thinktime_spin)
 747                                         usec_spin(td->o.thinktime_spin);
 748
 749                                 left = td->o.thinktime - td->o.thinktime_spin;
 750                                 if (left)
 751                                         usec_sleep(td, left);
 752                         }
 753                 }
 754         }
 755
 756         if (td->trim_entries)
 757                 printf("trim entries %ld\n", td->trim_entries);
 758
 759         if (td->o.fill_device && td->error == ENOSPC) {
 760                 td->error = 0;
 761                 td->terminate = 1;
 762         }
 763         if (!td->error) {
 764                 struct fio_file *f;
 765
 766                 i = td->cur_depth;
 767                 if (i)
 768                         ret = io_u_queued_complete(td, i, NULL);
 769
 770                 if (should_fsync(td) && td->o.end_fsync) {
 771                         td_set_runstate(td, TD_FSYNCING);
 772
 773                         for_each_file(td, f, i) {
 774                                 if (!fio_file_open(f))
 775                                         continue;
 776                                 fio_io_sync(td, f);
 777                         }
 778                 }
 779         } else
 780                 cleanup_pending_aio(td);
 781
 782         /*
 783          * stop job if we failed doing any IO
 784          */
 785         if ((td->this_io_bytes[0] + td->this_io_bytes[1]) == 0)
 786                 td->done = 1;
 787 }
 788
 789 static void cleanup_io_u(struct thread_data *td)
 790 {
 791         struct flist_head *entry, *n;
 792         struct io_u *io_u;
 793
 794         flist_for_each_safe(entry, n, &td->io_u_freelist) {
 795                 io_u = flist_entry(entry, struct io_u, list);
 796
 797                 flist_del(&io_u->list);
 798                 free(io_u);
 799         }
 800
 801         free_io_mem(td);
 802 }
 803
 804 static int init_io_u(struct thread_data *td)
 805 {
 806         struct io_u *io_u;
 807         unsigned int max_bs;
 808         int cl_align, i, max_units;
 809         char *p;
 810
 811         max_units = td->o.iodepth;
 812         max_bs = max(td->o.max_bs[DDIR_READ], td->o.max_bs[DDIR_WRITE]);
 813         td->orig_buffer_size = (unsigned long long) max_bs
 814                                         * (unsigned long long) max_units;
 815
 816         if (td->o.mem_type == MEM_SHMHUGE || td->o.mem_type == MEM_MMAPHUGE) {
 817                 unsigned long bs;
 818
 819                 bs = td->orig_buffer_size + td->o.hugepage_size - 1;
 820                 td->orig_buffer_size = bs & ~(td->o.hugepage_size - 1);
 821         }
 822
 823         if (td->orig_buffer_size != (size_t) td->orig_buffer_size) {
 824                 log_err("fio: IO memory too large. Reduce max_bs or iodepth\n");
 825                 return 1;
 826         }
 827
 828         if (allocate_io_mem(td))
 829                 return 1;
 830
 831         if (td->o.odirect || td->o.mem_align ||
 832             (td->io_ops->flags & FIO_RAWIO))
 833                 p = PAGE_ALIGN(td->orig_buffer) + td->o.mem_align;
 834         else
 835                 p = td->orig_buffer;
 836
 837         cl_align = os_cache_line_size();
 838
 839         for (i = 0; i < max_units; i++) {
 840                 void *ptr;
 841
 842                 if (td->terminate)
 843                         return 1;
 844
 845                 if (posix_memalign(&ptr, cl_align, sizeof(*io_u))) {
 846                         log_err("fio: posix_memalign=%s\n", strerror(errno));
 847                         break;
 848                 }
 849
 850                 io_u = ptr;
 851                 memset(io_u, 0, sizeof(*io_u));
 852                 INIT_FLIST_HEAD(&io_u->list);
 853                 dprint(FD_MEM, "io_u alloc %p, index %u\n", io_u, i);
 854
 855                 if (!(td->io_ops->flags & FIO_NOIO)) {
 856                         io_u->buf = p + max_bs * i;
 857                         dprint(FD_MEM, "io_u %p, mem %p\n", io_u, io_u->buf);
 858
 859                         if (td_write(td) && !td->o.refill_buffers)
 860                                 io_u_fill_buffer(td, io_u, max_bs);
 861                         else if (td_write(td) && td->o.verify_pattern_bytes) {
 862                                 /*
 863                                  * Fill the buffer with the pattern if we are
 864                                  * going to be doing writes.
 865                                  */
 866                                 fill_pattern(td, io_u->buf, max_bs, io_u);
 867                         }
 868                 }
 869
 870                 io_u->index = i;
 871                 io_u->flags = IO_U_F_FREE;
 872                 flist_add(&io_u->list, &td->io_u_freelist);
 873         }
 874
 875         return 0;
 876 }
 877
 878 static int switch_ioscheduler(struct thread_data *td)
 879 {
 880         char tmp[256], tmp2[128];
 881         FILE *f;
 882         int ret;
 883
 884         if (td->io_ops->flags & FIO_DISKLESSIO)
 885                 return 0;
 886
 887         sprintf(tmp, "%s/queue/scheduler", td->sysfs_root);
 888
 889         f = fopen(tmp, "r+");
 890         if (!f) {
 891                 if (errno == ENOENT) {
 892                         log_err("fio: os or kernel doesn't support IO scheduler"
 893                                 " switching\n");
 894                         return 0;
 895                 }
 896                 td_verror(td, errno, "fopen iosched");
 897                 return 1;
 898         }
 899
 900         /*
 901          * Set io scheduler.
 902          */
 903         ret = fwrite(td->o.ioscheduler, strlen(td->o.ioscheduler), 1, f);
 904         if (ferror(f) || ret != 1) {
 905                 td_verror(td, errno, "fwrite");
 906                 fclose(f);
 907                 return 1;
 908         }
 909
 910         rewind(f);
 911
 912         /*
 913          * Read back and check that the selected scheduler is now the default.
 914          */
 915         ret = fread(tmp, 1, sizeof(tmp), f);
 916         if (ferror(f) || ret < 0) {
 917                 td_verror(td, errno, "fread");
 918                 fclose(f);
 919                 return 1;
 920         }
 921
 922         sprintf(tmp2, "[%s]", td->o.ioscheduler);
 923         if (!strstr(tmp, tmp2)) {
 924                 log_err("fio: io scheduler %s not found\n", td->o.ioscheduler);
 925                 td_verror(td, EINVAL, "iosched_switch");
 926                 fclose(f);
 927                 return 1;
 928         }
 929
 930         fclose(f);
 931         return 0;
 932 }
 933
 934 static int keep_running(struct thread_data *td)
 935 {
 936         unsigned long long io_done;
 937
 938         if (td->done)
 939                 return 0;
 940         if (td->o.time_based)
 941                 return 1;
 942         if (td->o.loops) {
 943                 td->o.loops--;
 944                 return 1;
 945         }
 946
 947         io_done = td->io_bytes[DDIR_READ] + td->io_bytes[DDIR_WRITE]
 948                         + td->io_skip_bytes;
 949         if (io_done < td->o.size)
 950                 return 1;
 951
 952         return 0;
 953 }
 954
 955 static void reset_io_counters(struct thread_data *td)
 956 {
 957         td->ts.stat_io_bytes[0] = td->ts.stat_io_bytes[1] = 0;
 958         td->this_io_bytes[0] = td->this_io_bytes[1] = 0;
 959         td->zone_bytes = 0;
 960         td->rate_bytes[0] = td->rate_bytes[1] = 0;
 961         td->rate_blocks[0] = td->rate_blocks[1] = 0;
 962
 963         td->last_was_sync = 0;
 964
 965         /*
 966          * reset file done count if we are to start over
 967          */
 968         if (td->o.time_based || td->o.loops)
 969                 td->nr_done_files = 0;
 970
 971         /*
 972          * Set the same seed to get repeatable runs
 973          */
 974         td_fill_rand_seeds(td);
 975 }
 976
 977 void reset_all_stats(struct thread_data *td)
 978 {
 979         struct timeval tv;
 980         int i;
 981
 982         reset_io_counters(td);
 983
 984         for (i = 0; i < 2; i++) {
 985                 td->io_bytes[i] = 0;
 986                 td->io_blocks[i] = 0;
 987                 td->io_issues[i] = 0;
 988                 td->ts.total_io_u[i] = 0;
 989         }
 990
 991         fio_gettime(&tv, NULL);
 992         memcpy(&td->epoch, &tv, sizeof(tv));
 993         memcpy(&td->start, &tv, sizeof(tv));
 994 }
 995
 996 static void clear_io_state(struct thread_data *td)
 997 {
 998         struct fio_file *f;
 999         unsigned int i;
1000
1001         reset_io_counters(td);
1002
1003         close_files(td);
1004         for_each_file(td, f, i)
1005                 fio_file_clear_done(f);
1006 }
1007
1008 static int exec_string(const char *string)
1009 {
1010         int ret, newlen = strlen(string) + 1 + 8;
1011         char *str;
1012
1013         str = malloc(newlen);
1014         sprintf(str, "sh -c %s", string);
1015
1016         ret = system(str);
1017         if (ret == -1)
1018                 log_err("fio: exec of cmd <%s> failed\n", str);
1019
1020         free(str);
1021         return ret;
1022 }
1023
1024 /*
1025  * Entry point for the thread based jobs. The process based jobs end up
1026  * here as well, after a little setup.
1027  */
1028 static void *thread_main(void *data)
1029 {
1030         unsigned long long runtime[2], elapsed;
1031         struct thread_data *td = data;
1032         pthread_condattr_t attr;
1033         int clear_state;
1034
1035         if (!td->o.use_thread)
1036                 setsid();
1037
1038         td->pid = getpid();
1039
1040         dprint(FD_PROCESS, "jobs pid=%d started\n", (int) td->pid);
1041
1042         INIT_FLIST_HEAD(&td->io_u_freelist);
1043         INIT_FLIST_HEAD(&td->io_u_busylist);
1044         INIT_FLIST_HEAD(&td->io_u_requeues);
1045         INIT_FLIST_HEAD(&td->io_log_list);
1046         INIT_FLIST_HEAD(&td->io_hist_list);
1047         INIT_FLIST_HEAD(&td->verify_list);
1048         INIT_FLIST_HEAD(&td->trim_list);
1049         pthread_mutex_init(&td->io_u_lock, NULL);
1050         td->io_hist_tree = RB_ROOT;
1051
1052         pthread_condattr_init(&attr);
1053         pthread_cond_init(&td->verify_cond, &attr);
1054         pthread_cond_init(&td->free_cond, &attr);
1055
1056         td_set_runstate(td, TD_INITIALIZED);
1057         dprint(FD_MUTEX, "up startup_mutex\n");
1058         fio_mutex_up(startup_mutex);
1059         dprint(FD_MUTEX, "wait on td->mutex\n");
1060         fio_mutex_down(td->mutex);
1061         dprint(FD_MUTEX, "done waiting on td->mutex\n");
1062
1063         /*
1064          * the ->mutex mutex is now no longer used, close it to avoid
1065          * eating a file descriptor
1066          */
1067         fio_mutex_remove(td->mutex);
1068
1069         if (td->o.uid != -1U && setuid(td->o.uid)) {
1070                 td_verror(td, errno, "setuid");
1071                 goto err;
1072         }
1073         if (td->o.gid != -1U && setgid(td->o.gid)) {
1074                 td_verror(td, errno, "setgid");
1075                 goto err;
1076         }
1077
1078         /*
1079          * May alter parameters that init_io_u() will use, so we need to
1080          * do this first.
1081          */
1082         if (init_iolog(td))
1083                 goto err;
1084
1085         if (init_io_u(td))
1086                 goto err;
1087
1088         if (td->o.verify_async && verify_async_init(td))
1089                 goto err;
1090
1091         if (td->o.cpumask_set && fio_setaffinity(td->pid, td->o.cpumask) == -1) {
1092                 td_verror(td, errno, "cpu_set_affinity");
1093                 goto err;
1094         }
1095
1096         /*
1097          * If we have a gettimeofday() thread, make sure we exclude that
1098          * thread from this job
1099          */
1100         if (td->o.gtod_cpu) {
1101                 fio_cpu_clear(&td->o.cpumask, td->o.gtod_cpu);
1102                 if (fio_setaffinity(td->pid, td->o.cpumask) == -1) {
1103                         td_verror(td, errno, "cpu_set_affinity");
1104                         goto err;
1105                 }
1106         }
1107
1108         if (td->ioprio_set) {
1109                 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, td->ioprio) == -1) {
1110                         td_verror(td, errno, "ioprio_set");
1111                         goto err;
1112                 }
1113         }
1114
1115         if (td->o.cgroup_weight && cgroup_setup(td, cgroup_list, &cgroup_mnt))
1116                 goto err;
1117
1118         if (nice(td->o.nice) == -1) {
1119                 td_verror(td, errno, "nice");
1120                 goto err;
1121         }
1122
1123         if (td->o.ioscheduler && switch_ioscheduler(td))
1124                 goto err;
1125
1126         if (!td->o.create_serialize && setup_files(td))
1127                 goto err;
1128
1129         if (td_io_init(td))
1130                 goto err;
1131
1132         if (init_random_map(td))
1133                 goto err;
1134
1135         if (td->o.exec_prerun) {
1136                 if (exec_string(td->o.exec_prerun))
1137                         goto err;
1138         }
1139
1140         if (td->o.pre_read) {
1141                 if (pre_read_files(td) < 0)
1142                         goto err;
1143         }
1144
1145         fio_gettime(&td->epoch, NULL);
1146         getrusage(RUSAGE_SELF, &td->ts.ru_start);
1147
1148         runtime[0] = runtime[1] = 0;
1149         clear_state = 0;
1150         while (keep_running(td)) {
1151                 fio_gettime(&td->start, NULL);
1152                 memcpy(&td->ts.stat_sample_time[0], &td->start,
1153                                 sizeof(td->start));
1154                 memcpy(&td->ts.stat_sample_time[1], &td->start,
1155                                 sizeof(td->start));
1156                 memcpy(&td->tv_cache, &td->start, sizeof(td->start));
1157
1158                 if (td->o.ratemin[0] || td->o.ratemin[1])
1159                         memcpy(&td->lastrate, &td->ts.stat_sample_time,
1160                                                         sizeof(td->lastrate));
1161
1162                 if (clear_state)
1163                         clear_io_state(td);
1164
1165                 prune_io_piece_log(td);
1166
1167                 do_io(td);
1168
1169                 clear_state = 1;
1170
1171                 if (td_read(td) && td->io_bytes[DDIR_READ]) {
1172                         elapsed = utime_since_now(&td->start);
1173                         runtime[DDIR_READ] += elapsed;
1174                 }
1175                 if (td_write(td) && td->io_bytes[DDIR_WRITE]) {
1176                         elapsed = utime_since_now(&td->start);
1177                         runtime[DDIR_WRITE] += elapsed;
1178                 }
1179
1180                 if (td->error || td->terminate)
1181                         break;
1182
1183                 if (!td->o.do_verify ||
1184                     td->o.verify == VERIFY_NONE ||
1185                     (td->io_ops->flags & FIO_UNIDIR))
1186                         continue;
1187
1188                 clear_io_state(td);
1189
1190                 fio_gettime(&td->start, NULL);
1191
1192                 do_verify(td);
1193
1194                 runtime[DDIR_READ] += utime_since_now(&td->start);
1195
1196                 if (td->error || td->terminate)
1197                         break;
1198         }
1199
1200         update_rusage_stat(td);
1201         td->ts.runtime[0] = (runtime[0] + 999) / 1000;
1202         td->ts.runtime[1] = (runtime[1] + 999) / 1000;
1203         td->ts.total_run_time = mtime_since_now(&td->epoch);
1204         td->ts.io_bytes[0] = td->io_bytes[0];
1205         td->ts.io_bytes[1] = td->io_bytes[1];
1206
1207         fio_mutex_down(writeout_mutex);
1208         if (td->ts.bw_log) {
1209                 if (td->o.bw_log_file) {
1210                         finish_log_named(td, td->ts.bw_log,
1211                                                 td->o.bw_log_file, "bw");
1212                 } else
1213                         finish_log(td, td->ts.bw_log, "bw");
1214         }
1215         if (td->ts.lat_log) {
1216                 if (td->o.lat_log_file) {
1217                         finish_log_named(td, td->ts.lat_log,
1218                                                 td->o.lat_log_file, "lat");
1219                 } else
1220                         finish_log(td, td->ts.lat_log, "lat");
1221         }
1222         if (td->ts.slat_log) {
1223                 if (td->o.lat_log_file) {
1224                         finish_log_named(td, td->ts.slat_log,
1225                                                 td->o.lat_log_file, "slat");
1226                 } else
1227                         finish_log(td, td->ts.slat_log, "slat");
1228         }
1229         if (td->ts.clat_log) {
1230                 if (td->o.lat_log_file) {
1231                         finish_log_named(td, td->ts.clat_log,
1232                                                 td->o.lat_log_file, "clat");
1233                 } else
1234                         finish_log(td, td->ts.clat_log, "clat");
1235         }
1236         fio_mutex_up(writeout_mutex);
1237         if (td->o.exec_postrun)
1238                 exec_string(td->o.exec_postrun);
1239
1240         if (exitall_on_terminate)
1241                 terminate_threads(td->groupid);
1242
1243 err:
1244         if (td->error)
1245                 log_info("fio: pid=%d, err=%d/%s\n", (int) td->pid, td->error,
1246                                                         td->verror);
1247
1248         if (td->o.verify_async)
1249                 verify_async_exit(td);
1250
1251         close_and_free_files(td);
1252         close_ioengine(td);
1253         cleanup_io_u(td);
1254         cgroup_shutdown(td, &cgroup_mnt);
1255
1256         if (td->o.cpumask_set) {
1257                 int ret = fio_cpuset_exit(&td->o.cpumask);
1258
1259                 td_verror(td, ret, "fio_cpuset_exit");
1260         }
1261
1262         /*
1263          * do this very late, it will log file closing as well
1264          */
1265         if (td->o.write_iolog_file)
1266                 write_iolog_close(td);
1267
1268         options_mem_free(td);
1269         td_set_runstate(td, TD_EXITED);
1270         return (void *) (unsigned long) td->error;
1271 }
1272
1273 /*
1274  * We cannot pass the td data into a forked process, so attach the td and
1275  * pass it to the thread worker.
1276  */
1277 static int fork_main(int shmid, int offset)
1278 {
1279         struct thread_data *td;
1280         void *data, *ret;
1281
1282         data = shmat(shmid, NULL, 0);
1283         if (data == (void *) -1) {
1284                 int __err = errno;
1285
1286                 perror("shmat");
1287                 return __err;
1288         }
1289
1290         td = data + offset * sizeof(struct thread_data);
1291         ret = thread_main(td);
1292         shmdt(data);
1293         return (int) (unsigned long) ret;
1294 }
1295
1296 /*
1297  * Run over the job map and reap the threads that have exited, if any.
1298  */
1299 static void reap_threads(int *nr_running, int *t_rate, int *m_rate)
1300 {
1301         struct thread_data *td;
1302         int i, cputhreads, realthreads, pending, status, ret;
1303
1304         /*
1305          * reap exited threads (TD_EXITED -> TD_REAPED)
1306          */
1307         realthreads = pending = cputhreads = 0;
1308         for_each_td(td, i) {
1309                 int flags = 0;
1310
1311                 /*
1312                  * ->io_ops is NULL for a thread that has closed its
1313                  * io engine
1314                  */
1315                 if (td->io_ops && !strcmp(td->io_ops->name, "cpuio"))
1316                         cputhreads++;
1317                 else
1318                         realthreads++;
1319
1320                 if (!td->pid) {
1321                         pending++;
1322                         continue;
1323                 }
1324                 if (td->runstate == TD_REAPED)
1325                         continue;
1326                 if (td->o.use_thread) {
1327                         if (td->runstate == TD_EXITED) {
1328                                 td_set_runstate(td, TD_REAPED);
1329                                 goto reaped;
1330                         }
1331                         continue;
1332                 }
1333
1334                 flags = WNOHANG;
1335                 if (td->runstate == TD_EXITED)
1336                         flags = 0;
1337
1338                 /*
1339                  * check if someone quit or got killed in an unusual way
1340                  */
1341                 ret = waitpid(td->pid, &status, flags);
1342                 if (ret < 0) {
1343                         if (errno == ECHILD) {
1344                                 log_err("fio: pid=%d disappeared %d\n",
1345                                                 (int) td->pid, td->runstate);
1346                                 td_set_runstate(td, TD_REAPED);
1347                                 goto reaped;
1348                         }
1349                         perror("waitpid");
1350                 } else if (ret == td->pid) {
1351                         if (WIFSIGNALED(status)) {
1352                                 int sig = WTERMSIG(status);
1353
1354                                 if (sig != SIGQUIT)
1355                                         log_err("fio: pid=%d, got signal=%d\n",
1356                                                         (int) td->pid, sig);
1357                                 td_set_runstate(td, TD_REAPED);
1358                                 goto reaped;
1359                         }
1360                         if (WIFEXITED(status)) {
1361                                 if (WEXITSTATUS(status) && !td->error)
1362                                         td->error = WEXITSTATUS(status);
1363
1364                                 td_set_runstate(td, TD_REAPED);
1365                                 goto reaped;
1366                         }
1367                 }
1368
1369                 /*
1370                  * thread is not dead, continue
1371                  */
1372                 pending++;
1373                 continue;
1374 reaped:
1375                 (*nr_running)--;
1376                 (*m_rate) -= (td->o.ratemin[0] + td->o.ratemin[1]);
1377                 (*t_rate) -= (td->o.rate[0] + td->o.rate[1]);
1378                 if (!td->pid)
1379                         pending--;
1380
1381                 if (td->error)
1382                         exit_value++;
1383
1384                 done_secs += mtime_since_now(&td->epoch) / 1000;
1385         }
1386
1387         if (*nr_running == cputhreads && !pending && realthreads)
1388                 terminate_threads(TERMINATE_ALL);
1389 }
1390
1391 static void *gtod_thread_main(void *data)
1392 {
1393         fio_mutex_up(startup_mutex);
1394
1395         /*
1396          * As long as we have jobs around, update the clock. It would be nice
1397          * to have some way of NOT hammering that CPU with gettimeofday(),
1398          * but I'm not sure what to use outside of a simple CPU nop to relax
1399          * it - we don't want to lose precision.
1400          */
1401         while (threads) {
1402                 fio_gtod_update();
1403                 nop;
1404         }
1405
1406         return NULL;
1407 }
1408
1409 static int fio_start_gtod_thread(void)
1410 {
1411         pthread_attr_t attr;
1412         int ret;
1413
1414         pthread_attr_init(&attr);
1415         pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN);
1416         ret = pthread_create(&gtod_thread, &attr, gtod_thread_main, NULL);
1417         pthread_attr_destroy(&attr);
1418         if (ret) {
1419                 log_err("Can't create gtod thread: %s\n", strerror(ret));
1420                 return 1;
1421         }
1422
1423         ret = pthread_detach(gtod_thread);
1424         if (ret) {
1425                 log_err("Can't detatch gtod thread: %s\n", strerror(ret));
1426                 return 1;
1427         }
1428
1429         dprint(FD_MUTEX, "wait on startup_mutex\n");
1430         fio_mutex_down(startup_mutex);
1431         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1432         return 0;
1433 }
1434
1435 /*
1436  * Main function for kicking off and reaping jobs, as needed.
1437  */
1438 static void run_threads(void)
1439 {
1440         struct thread_data *td;
1441         unsigned long spent;
1442         int i, todo, nr_running, m_rate, t_rate, nr_started;
1443
1444         if (fio_pin_memory())
1445                 return;
1446
1447         if (fio_gtod_offload && fio_start_gtod_thread())
1448                 return;
1449
1450         if (!terse_output) {
1451                 log_info("Starting ");
1452                 if (nr_thread)
1453                         log_info("%d thread%s", nr_thread,
1454                                                 nr_thread > 1 ? "s" : "");
1455                 if (nr_process) {
1456                         if (nr_thread)
1457                                 printf(" and ");
1458                         log_info("%d process%s", nr_process,
1459                                                 nr_process > 1 ? "es" : "");
1460                 }
1461                 log_info("\n");
1462                 fflush(stdout);
1463         }
1464
1465         set_sig_handlers();
1466
1467         todo = thread_number;
1468         nr_running = 0;
1469         nr_started = 0;
1470         m_rate = t_rate = 0;
1471
1472         for_each_td(td, i) {
1473                 print_status_init(td->thread_number - 1);
1474
1475                 if (!td->o.create_serialize) {
1476                         init_disk_util(td);
1477                         continue;
1478                 }
1479
1480                 /*
1481                  * do file setup here so it happens sequentially,
1482                  * we don't want X number of threads getting their
1483                  * client data interspersed on disk
1484                  */
1485                 if (setup_files(td)) {
1486                         exit_value++;
1487                         if (td->error)
1488                                 log_err("fio: pid=%d, err=%d/%s\n",
1489                                         (int) td->pid, td->error, td->verror);
1490                         td_set_runstate(td, TD_REAPED);
1491                         todo--;
1492                 } else {
1493                         struct fio_file *f;
1494                         unsigned int i;
1495
1496                         /*
1497                          * for sharing to work, each job must always open
1498                          * its own files. so close them, if we opened them
1499                          * for creation
1500                          */
1501                         for_each_file(td, f, i) {
1502                                 if (fio_file_open(f))
1503                                         td_io_close_file(td, f);
1504                         }
1505                 }
1506
1507                 init_disk_util(td);
1508         }
1509
1510         set_genesis_time();
1511
1512         while (todo) {
1513                 struct thread_data *map[MAX_JOBS];
1514                 struct timeval this_start;
1515                 int this_jobs = 0, left;
1516
1517                 /*
1518                  * create threads (TD_NOT_CREATED -> TD_CREATED)
1519                  */
1520                 for_each_td(td, i) {
1521                         if (td->runstate != TD_NOT_CREATED)
1522                                 continue;
1523
1524                         /*
1525                          * never got a chance to start, killed by other
1526                          * thread for some reason
1527                          */
1528                         if (td->terminate) {
1529                                 todo--;
1530                                 continue;
1531                         }
1532
1533                         if (td->o.start_delay) {
1534                                 spent = mtime_since_genesis();
1535
1536                                 if (td->o.start_delay * 1000 > spent)
1537                                         continue;
1538                         }
1539
1540                         if (td->o.stonewall && (nr_started || nr_running)) {
1541                                 dprint(FD_PROCESS, "%s: stonewall wait\n",
1542                                                         td->o.name);
1543                                 break;
1544                         }
1545
1546                         /*
1547                          * Set state to created. Thread will transition
1548                          * to TD_INITIALIZED when it's done setting up.
1549                          */
1550                         td_set_runstate(td, TD_CREATED);
1551                         map[this_jobs++] = td;
1552                         nr_started++;
1553
1554                         if (td->o.use_thread) {
1555                                 int ret;
1556
1557                                 dprint(FD_PROCESS, "will pthread_create\n");
1558                                 ret = pthread_create(&td->thread, NULL,
1559                                                         thread_main, td);
1560                                 if (ret) {
1561                                         log_err("pthread_create: %s\n",
1562                                                         strerror(ret));
1563                                         nr_started--;
1564                                         break;
1565                                 }
1566                                 ret = pthread_detach(td->thread);
1567                                 if (ret)
1568                                         log_err("pthread_detach: %s",
1569                                                         strerror(ret));
1570                         } else {
1571                                 pid_t pid;
1572                                 dprint(FD_PROCESS, "will fork\n");
1573                                 pid = fork();
1574                                 if (!pid) {
1575                                         int ret = fork_main(shm_id, i);
1576
1577                                         _exit(ret);
1578                                 } else if (i == fio_debug_jobno)
1579                                         *fio_debug_jobp = pid;
1580                         }
1581                         dprint(FD_MUTEX, "wait on startup_mutex\n");
1582                         if (fio_mutex_down_timeout(startup_mutex, 10)) {
1583                                 log_err("fio: job startup hung? exiting.\n");
1584                                 terminate_threads(TERMINATE_ALL);
1585                                 fio_abort = 1;
1586                                 nr_started--;
1587                                 break;
1588                         }
1589                         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1590                 }
1591
1592                 /*
1593                  * Wait for the started threads to transition to
1594                  * TD_INITIALIZED.
1595                  */
1596                 fio_gettime(&this_start, NULL);
1597                 left = this_jobs;
1598                 while (left && !fio_abort) {
1599                         if (mtime_since_now(&this_start) > JOB_START_TIMEOUT)
1600                                 break;
1601
1602                         usleep(100000);
1603
1604                         for (i = 0; i < this_jobs; i++) {
1605                                 td = map[i];
1606                                 if (!td)
1607                                         continue;
1608                                 if (td->runstate == TD_INITIALIZED) {
1609                                         map[i] = NULL;
1610                                         left--;
1611                                 } else if (td->runstate >= TD_EXITED) {
1612                                         map[i] = NULL;
1613                                         left--;
1614                                         todo--;
1615                                         nr_running++; /* work-around... */
1616                                 }
1617                         }
1618                 }
1619
1620                 if (left) {
1621                         log_err("fio: %d jobs failed to start\n", left);
1622                         for (i = 0; i < this_jobs; i++) {
1623                                 td = map[i];
1624                                 if (!td)
1625                                         continue;
1626                                 kill(td->pid, SIGTERM);
1627                         }
1628                         break;
1629                 }
1630
1631                 /*
1632                  * start created threads (TD_INITIALIZED -> TD_RUNNING).
1633                  */
1634                 for_each_td(td, i) {
1635                         if (td->runstate != TD_INITIALIZED)
1636                                 continue;
1637
1638                         if (in_ramp_time(td))
1639                                 td_set_runstate(td, TD_RAMP);
1640                         else
1641                                 td_set_runstate(td, TD_RUNNING);
1642                         nr_running++;
1643                         nr_started--;
1644                         m_rate += td->o.ratemin[0] + td->o.ratemin[1];
1645                         t_rate += td->o.rate[0] + td->o.rate[1];
1646                         todo--;
1647                         fio_mutex_up(td->mutex);
1648                 }
1649
1650                 reap_threads(&nr_running, &t_rate, &m_rate);
1651
1652                 if (todo)
1653                         usleep(100000);
1654         }
1655
1656         while (nr_running) {
1657                 reap_threads(&nr_running, &t_rate, &m_rate);
1658                 usleep(10000);
1659         }
1660
1661         update_io_ticks();
1662         fio_unpin_memory();
1663 }
1664
1665 int main(int argc, char *argv[])
1666 {
1667         long ps;
1668
1669         sinit();
1670         init_rand(&__fio_rand_state);
1671
1672         /*
1673          * We need locale for number printing, if it isn't set then just
1674          * go with the US format.
1675          */
1676         if (!getenv("LC_NUMERIC"))
1677                 setlocale(LC_NUMERIC, "en_US");
1678
1679         ps = sysconf(_SC_PAGESIZE);
1680         if (ps < 0) {
1681                 log_err("Failed to get page size\n");
1682                 return 1;
1683         }
1684
1685         page_size = ps;
1686         page_mask = ps - 1;
1687
1688         fio_keywords_init();
1689
1690         if (parse_options(argc, argv))
1691                 return 1;
1692
1693         if (exec_profile && load_profile(exec_profile))
1694                 return 1;
1695
1696         if (!thread_number)
1697                 return 0;
1698
1699         if (write_bw_log) {
1700                 setup_log(&agg_io_log[DDIR_READ]);
1701                 setup_log(&agg_io_log[DDIR_WRITE]);
1702         }
1703
1704         startup_mutex = fio_mutex_init(0);
1705         writeout_mutex = fio_mutex_init(1);
1706
1707         set_genesis_time();
1708
1709         posix_timer_setup();
1710         status_timer_arm();
1711
1712         cgroup_list = smalloc(sizeof(*cgroup_list));
1713         INIT_FLIST_HEAD(cgroup_list);
1714
1715         run_threads();
1716
1717         if (!fio_abort) {
1718                 show_run_stats();
1719                 if (write_bw_log) {
1720                         __finish_log(agg_io_log[DDIR_READ], "agg-read_bw.log");
1721                         __finish_log(agg_io_log[DDIR_WRITE],
1722                                         "agg-write_bw.log");
1723                 }
1724         }
1725
1726         cgroup_kill(cgroup_list);
1727         sfree(cgroup_list);
1728         sfree(cgroup_mnt);
1729
1730         posix_timer_teardown();
1731         fio_mutex_remove(startup_mutex);
1732         fio_mutex_remove(writeout_mutex);
1733         return exit_value;
1734 }