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 <limits.h>
  28 #include <signal.h>
  29 #include <time.h>
  30 #include <locale.h>
  31 #include <assert.h>
  32 #include <time.h>
  33 #include <sys/stat.h>
  34 #include <sys/wait.h>
  35 #include <sys/ipc.h>
  36 #include <sys/shm.h>
  37 #include <sys/mman.h>
  38
  39 #include "fio.h"
  40 #include "hash.h"
  41 #include "smalloc.h"
  42 #include "verify.h"
  43 #include "trim.h"
  44 #include "diskutil.h"
  45 #include "cgroup.h"
  46 #include "profile.h"
  47 #include "lib/rand.h"
  48
  49 unsigned long page_mask;
  50 unsigned long page_size;
  51
  52 #define PAGE_ALIGN(buf) \
  53         (char *) (((unsigned long) (buf) + page_mask) & ~page_mask)
  54
  55 int groupid = 0;
  56 int thread_number = 0;
  57 int nr_process = 0;
  58 int nr_thread = 0;
  59 int shm_id = 0;
  60 int temp_stall_ts;
  61 unsigned long done_secs = 0;
  62
  63 static struct fio_mutex *startup_mutex;
  64 static struct fio_mutex *writeout_mutex;
  65 static volatile int fio_abort;
  66 static int exit_value;
  67 static pthread_t gtod_thread;
  68 static pthread_t disk_util_thread;
  69 static struct flist_head *cgroup_list;
  70 static char *cgroup_mnt;
  71
  72 struct io_log *agg_io_log[2];
  73
  74 #define TERMINATE_ALL           (-1)
  75 #define JOB_START_TIMEOUT       (5 * 1000)
  76
  77 void td_set_runstate(struct thread_data *td, int runstate)
  78 {
  79         if (td->runstate == runstate)
  80                 return;
  81
  82         dprint(FD_PROCESS, "pid=%d: runstate %d -> %d\n", (int) td->pid,
  83                                                 td->runstate, runstate);
  84         td->runstate = runstate;
  85 }
  86
  87 static void terminate_threads(int group_id)
  88 {
  89         struct thread_data *td;
  90         int i;
  91
  92         dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
  93
  94         for_each_td(td, i) {
  95                 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
  96                         dprint(FD_PROCESS, "setting terminate on %s/%d\n",
  97                                                 td->o.name, (int) td->pid);
  98                         td->terminate = 1;
  99                         td->o.start_delay = 0;
 100
 101                         /*
 102                          * if the thread is running, just let it exit
 103                          */
 104                         if (td->runstate < TD_RUNNING)
 105                                 kill(td->pid, SIGTERM);
 106                         else {
 107                                 struct ioengine_ops *ops = td->io_ops;
 108
 109                                 if (ops && (ops->flags & FIO_SIGTERM))
 110                                         kill(td->pid, SIGTERM);
 111                         }
 112                 }
 113         }
 114 }
 115
 116 /*
 117  * Happens on thread runs with ctrl-c, ignore our own SIGQUIT
 118  */
 119 static void sig_quit(int sig)
 120 {
 121 }
 122
 123 static void sig_int(int sig)
 124 {
 125         if (threads) {
 126                 log_info("\nfio: terminating on signal %d\n", sig);
 127                 fflush(stdout);
 128                 terminate_threads(TERMINATE_ALL);
 129         }
 130 }
 131
 132 static void *disk_thread_main(void *data)
 133 {
 134         fio_mutex_up(startup_mutex);
 135
 136         while (threads) {
 137                 usleep(DISK_UTIL_MSEC * 1000);
 138                 update_io_ticks();
 139                 print_thread_status();
 140         }
 141
 142         return NULL;
 143 }
 144
 145 static int create_disk_util_thread(void)
 146 {
 147         pthread_attr_t attr;
 148         int ret;
 149
 150         pthread_attr_init(&attr);
 151         pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN);
 152         ret = pthread_create(&disk_util_thread, &attr, disk_thread_main, NULL);
 153         pthread_attr_destroy(&attr);
 154         if (ret) {
 155                 log_err("Can't create disk util thread: %s\n", strerror(ret));
 156                 return 1;
 157         }
 158
 159         ret = pthread_detach(disk_util_thread);
 160         if (ret) {
 161                 log_err("Can't detatch disk util thread: %s\n", strerror(ret));
 162                 return 1;
 163         }
 164
 165         dprint(FD_MUTEX, "wait on startup_mutex\n");
 166         fio_mutex_down(startup_mutex);
 167         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
 168         return 0;
 169 }
 170
 171 static void set_sig_handlers(void)
 172 {
 173         struct sigaction act;
 174
 175         memset(&act, 0, sizeof(act));
 176         act.sa_handler = sig_int;
 177         act.sa_flags = SA_RESTART;
 178         sigaction(SIGINT, &act, NULL);
 179
 180         memset(&act, 0, sizeof(act));
 181         act.sa_handler = sig_quit;
 182         act.sa_flags = SA_RESTART;
 183         sigaction(SIGTERM, &act, NULL);
 184 }
 185
 186 /*
 187  * Check if we are above the minimum rate given.
 188  */
 189 static int __check_min_rate(struct thread_data *td, struct timeval *now,
 190                             enum td_ddir ddir)
 191 {
 192         unsigned long long bytes = 0;
 193         unsigned long iops = 0;
 194         unsigned long spent;
 195         unsigned long rate;
 196         unsigned int ratemin = 0;
 197         unsigned int rate_iops = 0;
 198         unsigned int rate_iops_min = 0;
 199
 200         assert(ddir_rw(ddir));
 201
 202         if (!td->o.ratemin[ddir] && !td->o.rate_iops_min[ddir])
 203                 return 0;
 204
 205         /*
 206          * allow a 2 second settle period in the beginning
 207          */
 208         if (mtime_since(&td->start, now) < 2000)
 209                 return 0;
 210
 211         iops += td->io_blocks[ddir];
 212         bytes += td->this_io_bytes[ddir];
 213         ratemin += td->o.ratemin[ddir];
 214         rate_iops += td->o.rate_iops[ddir];
 215         rate_iops_min += td->o.rate_iops_min[ddir];
 216
 217         /*
 218          * if rate blocks is set, sample is running
 219          */
 220         if (td->rate_bytes[ddir] || td->rate_blocks[ddir]) {
 221                 spent = mtime_since(&td->lastrate[ddir], now);
 222                 if (spent < td->o.ratecycle)
 223                         return 0;
 224
 225                 if (td->o.rate[ddir]) {
 226                         /*
 227                          * check bandwidth specified rate
 228                          */
 229                         if (bytes < td->rate_bytes[ddir]) {
 230                                 log_err("%s: min rate %u not met\n", td->o.name,
 231                                                                 ratemin);
 232                                 return 1;
 233                         } else {
 234                                 rate = ((bytes - td->rate_bytes[ddir]) * 1000) / spent;
 235                                 if (rate < ratemin ||
 236                                     bytes < td->rate_bytes[ddir]) {
 237                                         log_err("%s: min rate %u not met, got"
 238                                                 " %luKB/sec\n", td->o.name,
 239                                                         ratemin, rate);
 240                                         return 1;
 241                                 }
 242                         }
 243                 } else {
 244                         /*
 245                          * checks iops specified rate
 246                          */
 247                         if (iops < rate_iops) {
 248                                 log_err("%s: min iops rate %u not met\n",
 249                                                 td->o.name, rate_iops);
 250                                 return 1;
 251                         } else {
 252                                 rate = ((iops - td->rate_blocks[ddir]) * 1000) / spent;
 253                                 if (rate < rate_iops_min ||
 254                                     iops < td->rate_blocks[ddir]) {
 255                                         log_err("%s: min iops rate %u not met,"
 256                                                 " got %lu\n", td->o.name,
 257                                                         rate_iops_min, rate);
 258                                 }
 259                         }
 260                 }
 261         }
 262
 263         td->rate_bytes[ddir] = bytes;
 264         td->rate_blocks[ddir] = iops;
 265         memcpy(&td->lastrate[ddir], now, sizeof(*now));
 266         return 0;
 267 }
 268
 269 static int check_min_rate(struct thread_data *td, struct timeval *now,
 270                           unsigned long *bytes_done)
 271 {
 272         int ret = 0;
 273
 274         if (bytes_done[0])
 275                 ret |= __check_min_rate(td, now, 0);
 276         if (bytes_done[1])
 277                 ret |= __check_min_rate(td, now, 1);
 278
 279         return ret;
 280 }
 281
 282 static inline int runtime_exceeded(struct thread_data *td, struct timeval *t)
 283 {
 284         if (!td->o.timeout)
 285                 return 0;
 286         if (mtime_since(&td->epoch, t) >= td->o.timeout * 1000)
 287                 return 1;
 288
 289         return 0;
 290 }
 291
 292 /*
 293  * When job exits, we can cancel the in-flight IO if we are using async
 294  * io. Attempt to do so.
 295  */
 296 static void cleanup_pending_aio(struct thread_data *td)
 297 {
 298         struct flist_head *entry, *n;
 299         struct io_u *io_u;
 300         int r;
 301
 302         /*
 303          * get immediately available events, if any
 304          */
 305         r = io_u_queued_complete(td, 0, NULL);
 306         if (r < 0)
 307                 return;
 308
 309         /*
 310          * now cancel remaining active events
 311          */
 312         if (td->io_ops->cancel) {
 313                 flist_for_each_safe(entry, n, &td->io_u_busylist) {
 314                         io_u = flist_entry(entry, struct io_u, list);
 315
 316                         /*
 317                          * if the io_u isn't in flight, then that generally
 318                          * means someone leaked an io_u. complain but fix
 319                          * it up, so we don't stall here.
 320                          */
 321                         if ((io_u->flags & IO_U_F_FLIGHT) == 0) {
 322                                 log_err("fio: non-busy IO on busy list\n");
 323                                 put_io_u(td, io_u);
 324                         } else {
 325                                 r = td->io_ops->cancel(td, io_u);
 326                                 if (!r)
 327                                         put_io_u(td, io_u);
 328                         }
 329                 }
 330         }
 331
 332         if (td->cur_depth)
 333                 r = io_u_queued_complete(td, td->cur_depth, NULL);
 334 }
 335
 336 /*
 337  * Helper to handle the final sync of a file. Works just like the normal
 338  * io path, just does everything sync.
 339  */
 340 static int fio_io_sync(struct thread_data *td, struct fio_file *f)
 341 {
 342         struct io_u *io_u = __get_io_u(td);
 343         int ret;
 344
 345         if (!io_u)
 346                 return 1;
 347
 348         io_u->ddir = DDIR_SYNC;
 349         io_u->file = f;
 350
 351         if (td_io_prep(td, io_u)) {
 352                 put_io_u(td, io_u);
 353                 return 1;
 354         }
 355
 356 requeue:
 357         ret = td_io_queue(td, io_u);
 358         if (ret < 0) {
 359                 td_verror(td, io_u->error, "td_io_queue");
 360                 put_io_u(td, io_u);
 361                 return 1;
 362         } else if (ret == FIO_Q_QUEUED) {
 363                 if (io_u_queued_complete(td, 1, NULL) < 0)
 364                         return 1;
 365         } else if (ret == FIO_Q_COMPLETED) {
 366                 if (io_u->error) {
 367                         td_verror(td, io_u->error, "td_io_queue");
 368                         return 1;
 369                 }
 370
 371                 if (io_u_sync_complete(td, io_u, NULL) < 0)
 372                         return 1;
 373         } else if (ret == FIO_Q_BUSY) {
 374                 if (td_io_commit(td))
 375                         return 1;
 376                 goto requeue;
 377         }
 378
 379         return 0;
 380 }
 381
 382 static inline void update_tv_cache(struct thread_data *td)
 383 {
 384         if ((++td->tv_cache_nr & td->tv_cache_mask) == td->tv_cache_mask)
 385                 fio_gettime(&td->tv_cache, NULL);
 386 }
 387
 388 static int break_on_this_error(struct thread_data *td, int *retptr)
 389 {
 390         int ret = *retptr;
 391
 392         if (ret < 0 || td->error) {
 393                 int err;
 394
 395                 if (!td->o.continue_on_error)
 396                         return 1;
 397
 398                 if (ret < 0)
 399                         err = -ret;
 400                 else
 401                         err = td->error;
 402
 403                 if (td_non_fatal_error(err)) {
 404                         /*
 405                          * Continue with the I/Os in case of
 406                          * a non fatal error.
 407                          */
 408                         update_error_count(td, err);
 409                         td_clear_error(td);
 410                         *retptr = 0;
 411                         return 0;
 412                 } else if (td->o.fill_device && err == ENOSPC) {
 413                         /*
 414                          * We expect to hit this error if
 415                          * fill_device option is set.
 416                          */
 417                         td_clear_error(td);
 418                         td->terminate = 1;
 419                         return 1;
 420                 } else {
 421                         /*
 422                          * Stop the I/O in case of a fatal
 423                          * error.
 424                          */
 425                         update_error_count(td, err);
 426                         return 1;
 427                 }
 428         }
 429
 430         return 0;
 431 }
 432
 433 /*
 434  * The main verify engine. Runs over the writes we previously submitted,
 435  * reads the blocks back in, and checks the crc/md5 of the data.
 436  */
 437 static void do_verify(struct thread_data *td)
 438 {
 439         struct fio_file *f;
 440         struct io_u *io_u;
 441         int ret, min_events;
 442         unsigned int i;
 443
 444         dprint(FD_VERIFY, "starting loop\n");
 445
 446         /*
 447          * sync io first and invalidate cache, to make sure we really
 448          * read from disk.
 449          */
 450         for_each_file(td, f, i) {
 451                 if (!fio_file_open(f))
 452                         continue;
 453                 if (fio_io_sync(td, f))
 454                         break;
 455                 if (file_invalidate_cache(td, f))
 456                         break;
 457         }
 458
 459         if (td->error)
 460                 return;
 461
 462         td_set_runstate(td, TD_VERIFYING);
 463
 464         io_u = NULL;
 465         while (!td->terminate) {
 466                 int ret2, full;
 467
 468                 update_tv_cache(td);
 469
 470                 if (runtime_exceeded(td, &td->tv_cache)) {
 471                         td->terminate = 1;
 472                         break;
 473                 }
 474
 475                 io_u = __get_io_u(td);
 476                 if (!io_u)
 477                         break;
 478
 479                 if (get_next_verify(td, io_u)) {
 480                         put_io_u(td, io_u);
 481                         break;
 482                 }
 483
 484                 if (td_io_prep(td, io_u)) {
 485                         put_io_u(td, io_u);
 486                         break;
 487                 }
 488
 489                 if (td->o.verify_async)
 490                         io_u->end_io = verify_io_u_async;
 491                 else
 492                         io_u->end_io = verify_io_u;
 493
 494                 ret = td_io_queue(td, io_u);
 495                 switch (ret) {
 496                 case FIO_Q_COMPLETED:
 497                         if (io_u->error) {
 498                                 ret = -io_u->error;
 499                                 clear_io_u(td, io_u);
 500                         } else if (io_u->resid) {
 501                                 int bytes = io_u->xfer_buflen - io_u->resid;
 502                                 struct fio_file *f = io_u->file;
 503
 504                                 /*
 505                                  * zero read, fail
 506                                  */
 507                                 if (!bytes) {
 508                                         td_verror(td, EIO, "full resid");
 509                                         put_io_u(td, io_u);
 510                                         break;
 511                                 }
 512
 513                                 io_u->xfer_buflen = io_u->resid;
 514                                 io_u->xfer_buf += bytes;
 515                                 io_u->offset += bytes;
 516
 517                                 if (ddir_rw(io_u->ddir))
 518                                         td->ts.short_io_u[io_u->ddir]++;
 519
 520                                 if (io_u->offset == f->real_file_size)
 521                                         goto sync_done;
 522
 523                                 requeue_io_u(td, &io_u);
 524                         } else {
 525 sync_done:
 526                                 ret = io_u_sync_complete(td, io_u, NULL);
 527                                 if (ret < 0)
 528                                         break;
 529                         }
 530                         continue;
 531                 case FIO_Q_QUEUED:
 532                         break;
 533                 case FIO_Q_BUSY:
 534                         requeue_io_u(td, &io_u);
 535                         ret2 = td_io_commit(td);
 536                         if (ret2 < 0)
 537                                 ret = ret2;
 538                         break;
 539                 default:
 540                         assert(ret < 0);
 541                         td_verror(td, -ret, "td_io_queue");
 542                         break;
 543                 }
 544
 545                 if (break_on_this_error(td, &ret))
 546                         break;
 547
 548                 /*
 549                  * if we can queue more, do so. but check if there are
 550                  * completed io_u's first.
 551                  */
 552                 full = queue_full(td) || ret == FIO_Q_BUSY;
 553                 if (full || !td->o.iodepth_batch_complete) {
 554                         min_events = min(td->o.iodepth_batch_complete,
 555                                          td->cur_depth);
 556                         if (full && !min_events)
 557                                 min_events = 1;
 558
 559                         do {
 560                                 /*
 561                                  * Reap required number of io units, if any,
 562                                  * and do the verification on them through
 563                                  * the callback handler
 564                                  */
 565                                 if (io_u_queued_complete(td, min_events, NULL) < 0) {
 566                                         ret = -1;
 567                                         break;
 568                                 }
 569                         } while (full && (td->cur_depth > td->o.iodepth_low));
 570                 }
 571                 if (ret < 0)
 572                         break;
 573         }
 574
 575         if (!td->error) {
 576                 min_events = td->cur_depth;
 577
 578                 if (min_events)
 579                         ret = io_u_queued_complete(td, min_events, NULL);
 580         } else
 581                 cleanup_pending_aio(td);
 582
 583         td_set_runstate(td, TD_RUNNING);
 584
 585         dprint(FD_VERIFY, "exiting loop\n");
 586 }
 587
 588 /*
 589  * Main IO worker function. It retrieves io_u's to process and queues
 590  * and reaps them, checking for rate and errors along the way.
 591  */
 592 static void do_io(struct thread_data *td)
 593 {
 594         unsigned int i;
 595         int ret = 0;
 596
 597         if (in_ramp_time(td))
 598                 td_set_runstate(td, TD_RAMP);
 599         else
 600                 td_set_runstate(td, TD_RUNNING);
 601
 602         while ( (td->o.read_iolog_file && !flist_empty(&td->io_log_list)) ||
 603                 (!flist_empty(&td->trim_list)) ||
 604                 ((td->this_io_bytes[0] + td->this_io_bytes[1]) < td->o.size) ) {
 605                 struct timeval comp_time;
 606                 unsigned long bytes_done[2] = { 0, 0 };
 607                 int min_evts = 0;
 608                 struct io_u *io_u;
 609                 int ret2, full;
 610
 611                 if (td->terminate)
 612                         break;
 613
 614                 update_tv_cache(td);
 615
 616                 if (runtime_exceeded(td, &td->tv_cache)) {
 617                         td->terminate = 1;
 618                         break;
 619                 }
 620
 621                 io_u = get_io_u(td);
 622                 if (!io_u)
 623                         break;
 624
 625                 /*
 626                  * Add verification end_io handler, if asked to verify
 627                  * a previously written file.
 628                  */
 629                 if (td->o.verify != VERIFY_NONE && io_u->ddir == DDIR_READ &&
 630                     !td_rw(td)) {
 631                         if (td->o.verify_async)
 632                                 io_u->end_io = verify_io_u_async;
 633                         else
 634                                 io_u->end_io = verify_io_u;
 635                         td_set_runstate(td, TD_VERIFYING);
 636                 } else if (in_ramp_time(td))
 637                         td_set_runstate(td, TD_RAMP);
 638                 else
 639                         td_set_runstate(td, TD_RUNNING);
 640
 641                 ret = td_io_queue(td, io_u);
 642                 switch (ret) {
 643                 case FIO_Q_COMPLETED:
 644                         if (io_u->error) {
 645                                 ret = -io_u->error;
 646                                 clear_io_u(td, io_u);
 647                         } else if (io_u->resid) {
 648                                 int bytes = io_u->xfer_buflen - io_u->resid;
 649                                 struct fio_file *f = io_u->file;
 650
 651                                 /*
 652                                  * zero read, fail
 653                                  */
 654                                 if (!bytes) {
 655                                         td_verror(td, EIO, "full resid");
 656                                         put_io_u(td, io_u);
 657                                         break;
 658                                 }
 659
 660                                 io_u->xfer_buflen = io_u->resid;
 661                                 io_u->xfer_buf += bytes;
 662                                 io_u->offset += bytes;
 663
 664                                 if (ddir_rw(io_u->ddir))
 665                                         td->ts.short_io_u[io_u->ddir]++;
 666
 667                                 if (io_u->offset == f->real_file_size)
 668                                         goto sync_done;
 669
 670                                 requeue_io_u(td, &io_u);
 671                         } else {
 672 sync_done:
 673                                 if (__should_check_rate(td, 0) ||
 674                                     __should_check_rate(td, 1))
 675                                         fio_gettime(&comp_time, NULL);
 676
 677                                 ret = io_u_sync_complete(td, io_u, bytes_done);
 678                                 if (ret < 0)
 679                                         break;
 680                         }
 681                         break;
 682                 case FIO_Q_QUEUED:
 683                         /*
 684                          * if the engine doesn't have a commit hook,
 685                          * the io_u is really queued. if it does have such
 686                          * a hook, it has to call io_u_queued() itself.
 687                          */
 688                         if (td->io_ops->commit == NULL)
 689                                 io_u_queued(td, io_u);
 690                         break;
 691                 case FIO_Q_BUSY:
 692                         requeue_io_u(td, &io_u);
 693                         ret2 = td_io_commit(td);
 694                         if (ret2 < 0)
 695                                 ret = ret2;
 696                         break;
 697                 default:
 698                         assert(ret < 0);
 699                         put_io_u(td, io_u);
 700                         break;
 701                 }
 702
 703                 if (break_on_this_error(td, &ret))
 704                         break;
 705
 706                 /*
 707                  * See if we need to complete some commands
 708                  */
 709                 full = queue_full(td) || ret == FIO_Q_BUSY;
 710                 if (full || !td->o.iodepth_batch_complete) {
 711                         min_evts = min(td->o.iodepth_batch_complete,
 712                                         td->cur_depth);
 713                         if (full && !min_evts)
 714                                 min_evts = 1;
 715
 716                         if (__should_check_rate(td, 0) ||
 717                             __should_check_rate(td, 1))
 718                                 fio_gettime(&comp_time, NULL);
 719
 720                         do {
 721                                 ret = io_u_queued_complete(td, min_evts, bytes_done);
 722                                 if (ret < 0)
 723                                         break;
 724
 725                         } while (full && (td->cur_depth > td->o.iodepth_low));
 726                 }
 727
 728                 if (ret < 0)
 729                         break;
 730                 if (!(bytes_done[0] + bytes_done[1]))
 731                         continue;
 732
 733                 if (!in_ramp_time(td) && should_check_rate(td, bytes_done)) {
 734                         if (check_min_rate(td, &comp_time, bytes_done)) {
 735                                 if (exitall_on_terminate)
 736                                         terminate_threads(td->groupid);
 737                                 td_verror(td, EIO, "check_min_rate");
 738                                 break;
 739                         }
 740                 }
 741
 742                 if (td->o.thinktime) {
 743                         unsigned long long b;
 744
 745                         b = td->io_blocks[0] + td->io_blocks[1];
 746                         if (!(b % td->o.thinktime_blocks)) {
 747                                 int left;
 748
 749                                 if (td->o.thinktime_spin)
 750                                         usec_spin(td->o.thinktime_spin);
 751
 752                                 left = td->o.thinktime - td->o.thinktime_spin;
 753                                 if (left)
 754                                         usec_sleep(td, left);
 755                         }
 756                 }
 757         }
 758
 759         if (td->trim_entries)
 760                 printf("trim entries %ld\n", td->trim_entries);
 761
 762         if (td->o.fill_device && td->error == ENOSPC) {
 763                 td->error = 0;
 764                 td->terminate = 1;
 765         }
 766         if (!td->error) {
 767                 struct fio_file *f;
 768
 769                 i = td->cur_depth;
 770                 if (i)
 771                         ret = io_u_queued_complete(td, i, NULL);
 772
 773                 if (should_fsync(td) && td->o.end_fsync) {
 774                         td_set_runstate(td, TD_FSYNCING);
 775
 776                         for_each_file(td, f, i) {
 777                                 if (!fio_file_open(f))
 778                                         continue;
 779                                 fio_io_sync(td, f);
 780                         }
 781                 }
 782         } else
 783                 cleanup_pending_aio(td);
 784
 785         /*
 786          * stop job if we failed doing any IO
 787          */
 788         if ((td->this_io_bytes[0] + td->this_io_bytes[1]) == 0)
 789                 td->done = 1;
 790 }
 791
 792 static void cleanup_io_u(struct thread_data *td)
 793 {
 794         struct flist_head *entry, *n;
 795         struct io_u *io_u;
 796
 797         flist_for_each_safe(entry, n, &td->io_u_freelist) {
 798                 io_u = flist_entry(entry, struct io_u, list);
 799
 800                 flist_del(&io_u->list);
 801                 free(io_u);
 802         }
 803
 804         free_io_mem(td);
 805 }
 806
 807 static int init_io_u(struct thread_data *td)
 808 {
 809         struct io_u *io_u;
 810         unsigned int max_bs;
 811         int cl_align, i, max_units;
 812         char *p;
 813
 814         max_units = td->o.iodepth;
 815         max_bs = max(td->o.max_bs[DDIR_READ], td->o.max_bs[DDIR_WRITE]);
 816         td->orig_buffer_size = (unsigned long long) max_bs
 817                                         * (unsigned long long) max_units;
 818
 819         if (td->o.mem_type == MEM_SHMHUGE || td->o.mem_type == MEM_MMAPHUGE) {
 820                 unsigned long bs;
 821
 822                 bs = td->orig_buffer_size + td->o.hugepage_size - 1;
 823                 td->orig_buffer_size = bs & ~(td->o.hugepage_size - 1);
 824         }
 825
 826         if (td->orig_buffer_size != (size_t) td->orig_buffer_size) {
 827                 log_err("fio: IO memory too large. Reduce max_bs or iodepth\n");
 828                 return 1;
 829         }
 830
 831         if (allocate_io_mem(td))
 832                 return 1;
 833
 834         if (td->o.odirect || td->o.mem_align ||
 835             (td->io_ops->flags & FIO_RAWIO))
 836                 p = PAGE_ALIGN(td->orig_buffer) + td->o.mem_align;
 837         else
 838                 p = td->orig_buffer;
 839
 840         cl_align = os_cache_line_size();
 841
 842         for (i = 0; i < max_units; i++) {
 843                 void *ptr;
 844
 845                 if (td->terminate)
 846                         return 1;
 847
 848                 if (posix_memalign(&ptr, cl_align, sizeof(*io_u))) {
 849                         log_err("fio: posix_memalign=%s\n", strerror(errno));
 850                         break;
 851                 }
 852
 853                 io_u = ptr;
 854                 memset(io_u, 0, sizeof(*io_u));
 855                 INIT_FLIST_HEAD(&io_u->list);
 856                 dprint(FD_MEM, "io_u alloc %p, index %u\n", io_u, i);
 857
 858                 if (!(td->io_ops->flags & FIO_NOIO)) {
 859                         io_u->buf = p + max_bs * i;
 860                         dprint(FD_MEM, "io_u %p, mem %p\n", io_u, io_u->buf);
 861
 862                         if (td_write(td) && !td->o.refill_buffers)
 863                                 io_u_fill_buffer(td, io_u, max_bs);
 864                         else if (td_write(td) && td->o.verify_pattern_bytes) {
 865                                 /*
 866                                  * Fill the buffer with the pattern if we are
 867                                  * going to be doing writes.
 868                                  */
 869                                 fill_pattern(td, io_u->buf, max_bs, io_u, 0, 0);
 870                         }
 871                 }
 872
 873                 io_u->index = i;
 874                 io_u->flags = IO_U_F_FREE;
 875                 flist_add(&io_u->list, &td->io_u_freelist);
 876         }
 877
 878         return 0;
 879 }
 880
 881 static int switch_ioscheduler(struct thread_data *td)
 882 {
 883         char tmp[256], tmp2[128];
 884         FILE *f;
 885         int ret;
 886
 887         if (td->io_ops->flags & FIO_DISKLESSIO)
 888                 return 0;
 889
 890         sprintf(tmp, "%s/queue/scheduler", td->sysfs_root);
 891
 892         f = fopen(tmp, "r+");
 893         if (!f) {
 894                 if (errno == ENOENT) {
 895                         log_err("fio: os or kernel doesn't support IO scheduler"
 896                                 " switching\n");
 897                         return 0;
 898                 }
 899                 td_verror(td, errno, "fopen iosched");
 900                 return 1;
 901         }
 902
 903         /*
 904          * Set io scheduler.
 905          */
 906         ret = fwrite(td->o.ioscheduler, strlen(td->o.ioscheduler), 1, f);
 907         if (ferror(f) || ret != 1) {
 908                 td_verror(td, errno, "fwrite");
 909                 fclose(f);
 910                 return 1;
 911         }
 912
 913         rewind(f);
 914
 915         /*
 916          * Read back and check that the selected scheduler is now the default.
 917          */
 918         ret = fread(tmp, 1, sizeof(tmp), f);
 919         if (ferror(f) || ret < 0) {
 920                 td_verror(td, errno, "fread");
 921                 fclose(f);
 922                 return 1;
 923         }
 924
 925         sprintf(tmp2, "[%s]", td->o.ioscheduler);
 926         if (!strstr(tmp, tmp2)) {
 927                 log_err("fio: io scheduler %s not found\n", td->o.ioscheduler);
 928                 td_verror(td, EINVAL, "iosched_switch");
 929                 fclose(f);
 930                 return 1;
 931         }
 932
 933         fclose(f);
 934         return 0;
 935 }
 936
 937 static int keep_running(struct thread_data *td)
 938 {
 939         unsigned long long io_done;
 940
 941         if (td->done)
 942                 return 0;
 943         if (td->o.time_based)
 944                 return 1;
 945         if (td->o.loops) {
 946                 td->o.loops--;
 947                 return 1;
 948         }
 949
 950         io_done = td->io_bytes[DDIR_READ] + td->io_bytes[DDIR_WRITE]
 951                         + td->io_skip_bytes;
 952         if (io_done < td->o.size)
 953                 return 1;
 954
 955         return 0;
 956 }
 957
 958 static void reset_io_counters(struct thread_data *td)
 959 {
 960         td->ts.stat_io_bytes[0] = td->ts.stat_io_bytes[1] = 0;
 961         td->this_io_bytes[0] = td->this_io_bytes[1] = 0;
 962         td->zone_bytes = 0;
 963         td->rate_bytes[0] = td->rate_bytes[1] = 0;
 964         td->rate_blocks[0] = td->rate_blocks[1] = 0;
 965
 966         td->last_was_sync = 0;
 967
 968         /*
 969          * reset file done count if we are to start over
 970          */
 971         if (td->o.time_based || td->o.loops)
 972                 td->nr_done_files = 0;
 973
 974         /*
 975          * Set the same seed to get repeatable runs
 976          */
 977         td_fill_rand_seeds(td);
 978 }
 979
 980 void reset_all_stats(struct thread_data *td)
 981 {
 982         struct timeval tv;
 983         int i;
 984
 985         reset_io_counters(td);
 986
 987         for (i = 0; i < 2; i++) {
 988                 td->io_bytes[i] = 0;
 989                 td->io_blocks[i] = 0;
 990                 td->io_issues[i] = 0;
 991                 td->ts.total_io_u[i] = 0;
 992         }
 993
 994         fio_gettime(&tv, NULL);
 995         td->ts.runtime[0] = 0;
 996         td->ts.runtime[1] = 0;
 997         memcpy(&td->epoch, &tv, sizeof(tv));
 998         memcpy(&td->start, &tv, sizeof(tv));
 999 }
1000
1001 static void clear_io_state(struct thread_data *td)
1002 {
1003         struct fio_file *f;
1004         unsigned int i;
1005
1006         reset_io_counters(td);
1007
1008         close_files(td);
1009         for_each_file(td, f, i)
1010                 fio_file_clear_done(f);
1011 }
1012
1013 static int exec_string(const char *string)
1014 {
1015         int ret, newlen = strlen(string) + 1 + 8;
1016         char *str;
1017
1018         str = malloc(newlen);
1019         sprintf(str, "sh -c %s", string);
1020
1021         ret = system(str);
1022         if (ret == -1)
1023                 log_err("fio: exec of cmd <%s> failed\n", str);
1024
1025         free(str);
1026         return ret;
1027 }
1028
1029 /*
1030  * Entry point for the thread based jobs. The process based jobs end up
1031  * here as well, after a little setup.
1032  */
1033 static void *thread_main(void *data)
1034 {
1035         unsigned long long elapsed;
1036         struct thread_data *td = data;
1037         pthread_condattr_t attr;
1038         int clear_state;
1039
1040         if (!td->o.use_thread)
1041                 setsid();
1042
1043         td->pid = getpid();
1044
1045         dprint(FD_PROCESS, "jobs pid=%d started\n", (int) td->pid);
1046
1047         INIT_FLIST_HEAD(&td->io_u_freelist);
1048         INIT_FLIST_HEAD(&td->io_u_busylist);
1049         INIT_FLIST_HEAD(&td->io_u_requeues);
1050         INIT_FLIST_HEAD(&td->io_log_list);
1051         INIT_FLIST_HEAD(&td->io_hist_list);
1052         INIT_FLIST_HEAD(&td->verify_list);
1053         INIT_FLIST_HEAD(&td->trim_list);
1054         pthread_mutex_init(&td->io_u_lock, NULL);
1055         td->io_hist_tree = RB_ROOT;
1056
1057         pthread_condattr_init(&attr);
1058         pthread_cond_init(&td->verify_cond, &attr);
1059         pthread_cond_init(&td->free_cond, &attr);
1060
1061         td_set_runstate(td, TD_INITIALIZED);
1062         dprint(FD_MUTEX, "up startup_mutex\n");
1063         fio_mutex_up(startup_mutex);
1064         dprint(FD_MUTEX, "wait on td->mutex\n");
1065         fio_mutex_down(td->mutex);
1066         dprint(FD_MUTEX, "done waiting on td->mutex\n");
1067
1068         /*
1069          * the ->mutex mutex is now no longer used, close it to avoid
1070          * eating a file descriptor
1071          */
1072         fio_mutex_remove(td->mutex);
1073
1074         /*
1075          * A new gid requires privilege, so we need to do this before setting
1076          * the uid.
1077          */
1078         if (td->o.gid != -1U && setgid(td->o.gid)) {
1079                 td_verror(td, errno, "setgid");
1080                 goto err;
1081         }
1082         if (td->o.uid != -1U && setuid(td->o.uid)) {
1083                 td_verror(td, errno, "setuid");
1084                 goto err;
1085         }
1086
1087         /*
1088          * May alter parameters that init_io_u() will use, so we need to
1089          * do this first.
1090          */
1091         if (init_iolog(td))
1092                 goto err;
1093
1094         if (init_io_u(td))
1095                 goto err;
1096
1097         if (td->o.verify_async && verify_async_init(td))
1098                 goto err;
1099
1100         if (td->o.cpumask_set && fio_setaffinity(td->pid, td->o.cpumask) == -1) {
1101                 td_verror(td, errno, "cpu_set_affinity");
1102                 goto err;
1103         }
1104
1105         /*
1106          * If we have a gettimeofday() thread, make sure we exclude that
1107          * thread from this job
1108          */
1109         if (td->o.gtod_cpu) {
1110                 fio_cpu_clear(&td->o.cpumask, td->o.gtod_cpu);
1111                 if (fio_setaffinity(td->pid, td->o.cpumask) == -1) {
1112                         td_verror(td, errno, "cpu_set_affinity");
1113                         goto err;
1114                 }
1115         }
1116
1117         if (td->ioprio_set) {
1118                 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, td->ioprio) == -1) {
1119                         td_verror(td, errno, "ioprio_set");
1120                         goto err;
1121                 }
1122         }
1123
1124         if (td->o.cgroup_weight && cgroup_setup(td, cgroup_list, &cgroup_mnt))
1125                 goto err;
1126
1127         if (nice(td->o.nice) == -1) {
1128                 td_verror(td, errno, "nice");
1129                 goto err;
1130         }
1131
1132         if (td->o.ioscheduler && switch_ioscheduler(td))
1133                 goto err;
1134
1135         if (!td->o.create_serialize && setup_files(td))
1136                 goto err;
1137
1138         if (td_io_init(td))
1139                 goto err;
1140
1141         if (init_random_map(td))
1142                 goto err;
1143
1144         if (td->o.exec_prerun) {
1145                 if (exec_string(td->o.exec_prerun))
1146                         goto err;
1147         }
1148
1149         if (td->o.pre_read) {
1150                 if (pre_read_files(td) < 0)
1151                         goto err;
1152         }
1153
1154         fio_gettime(&td->epoch, NULL);
1155         getrusage(RUSAGE_SELF, &td->ts.ru_start);
1156
1157         clear_state = 0;
1158         while (keep_running(td)) {
1159                 fio_gettime(&td->start, NULL);
1160                 memcpy(&td->ts.stat_sample_time[0], &td->start,
1161                                 sizeof(td->start));
1162                 memcpy(&td->ts.stat_sample_time[1], &td->start,
1163                                 sizeof(td->start));
1164                 memcpy(&td->tv_cache, &td->start, sizeof(td->start));
1165
1166                 if (td->o.ratemin[0] || td->o.ratemin[1])
1167                         memcpy(&td->lastrate, &td->ts.stat_sample_time,
1168                                                         sizeof(td->lastrate));
1169
1170                 if (clear_state)
1171                         clear_io_state(td);
1172
1173                 prune_io_piece_log(td);
1174
1175                 do_io(td);
1176
1177                 clear_state = 1;
1178
1179                 if (td_read(td) && td->io_bytes[DDIR_READ]) {
1180                         elapsed = utime_since_now(&td->start);
1181                         td->ts.runtime[DDIR_READ] += elapsed;
1182                 }
1183                 if (td_write(td) && td->io_bytes[DDIR_WRITE]) {
1184                         elapsed = utime_since_now(&td->start);
1185                         td->ts.runtime[DDIR_WRITE] += elapsed;
1186                 }
1187
1188                 if (td->error || td->terminate)
1189                         break;
1190
1191                 if (!td->o.do_verify ||
1192                     td->o.verify == VERIFY_NONE ||
1193                     (td->io_ops->flags & FIO_UNIDIR))
1194                         continue;
1195
1196                 clear_io_state(td);
1197
1198                 fio_gettime(&td->start, NULL);
1199
1200                 do_verify(td);
1201
1202                 td->ts.runtime[DDIR_READ] += utime_since_now(&td->start);
1203
1204                 if (td->error || td->terminate)
1205                         break;
1206         }
1207
1208         update_rusage_stat(td);
1209         td->ts.runtime[0] = (td->ts.runtime[0] + 999) / 1000;
1210         td->ts.runtime[1] = (td->ts.runtime[1] + 999) / 1000;
1211         td->ts.total_run_time = mtime_since_now(&td->epoch);
1212         td->ts.io_bytes[0] = td->io_bytes[0];
1213         td->ts.io_bytes[1] = td->io_bytes[1];
1214
1215         fio_mutex_down(writeout_mutex);
1216         if (td->ts.bw_log) {
1217                 if (td->o.bw_log_file) {
1218                         finish_log_named(td, td->ts.bw_log,
1219                                                 td->o.bw_log_file, "bw");
1220                 } else
1221                         finish_log(td, td->ts.bw_log, "bw");
1222         }
1223         if (td->ts.lat_log) {
1224                 if (td->o.lat_log_file) {
1225                         finish_log_named(td, td->ts.lat_log,
1226                                                 td->o.lat_log_file, "lat");
1227                 } else
1228                         finish_log(td, td->ts.lat_log, "lat");
1229         }
1230         if (td->ts.slat_log) {
1231                 if (td->o.lat_log_file) {
1232                         finish_log_named(td, td->ts.slat_log,
1233                                                 td->o.lat_log_file, "slat");
1234                 } else
1235                         finish_log(td, td->ts.slat_log, "slat");
1236         }
1237         if (td->ts.clat_log) {
1238                 if (td->o.lat_log_file) {
1239                         finish_log_named(td, td->ts.clat_log,
1240                                                 td->o.lat_log_file, "clat");
1241                 } else
1242                         finish_log(td, td->ts.clat_log, "clat");
1243         }
1244         fio_mutex_up(writeout_mutex);
1245         if (td->o.exec_postrun)
1246                 exec_string(td->o.exec_postrun);
1247
1248         if (exitall_on_terminate)
1249                 terminate_threads(td->groupid);
1250
1251 err:
1252         if (td->error)
1253                 log_info("fio: pid=%d, err=%d/%s\n", (int) td->pid, td->error,
1254                                                         td->verror);
1255
1256         if (td->o.verify_async)
1257                 verify_async_exit(td);
1258
1259         close_and_free_files(td);
1260         close_ioengine(td);
1261         cleanup_io_u(td);
1262         cgroup_shutdown(td, &cgroup_mnt);
1263
1264         if (td->o.cpumask_set) {
1265                 int ret = fio_cpuset_exit(&td->o.cpumask);
1266
1267                 td_verror(td, ret, "fio_cpuset_exit");
1268         }
1269
1270         /*
1271          * do this very late, it will log file closing as well
1272          */
1273         if (td->o.write_iolog_file)
1274                 write_iolog_close(td);
1275
1276         options_mem_free(td);
1277         td_set_runstate(td, TD_EXITED);
1278         return (void *) (unsigned long) td->error;
1279 }
1280
1281 /*
1282  * We cannot pass the td data into a forked process, so attach the td and
1283  * pass it to the thread worker.
1284  */
1285 static int fork_main(int shmid, int offset)
1286 {
1287         struct thread_data *td;
1288         void *data, *ret;
1289
1290         data = shmat(shmid, NULL, 0);
1291         if (data == (void *) -1) {
1292                 int __err = errno;
1293
1294                 perror("shmat");
1295                 return __err;
1296         }
1297
1298         td = data + offset * sizeof(struct thread_data);
1299         ret = thread_main(td);
1300         shmdt(data);
1301         return (int) (unsigned long) ret;
1302 }
1303
1304 /*
1305  * Run over the job map and reap the threads that have exited, if any.
1306  */
1307 static void reap_threads(int *nr_running, int *t_rate, int *m_rate)
1308 {
1309         struct thread_data *td;
1310         int i, cputhreads, realthreads, pending, status, ret;
1311
1312         /*
1313          * reap exited threads (TD_EXITED -> TD_REAPED)
1314          */
1315         realthreads = pending = cputhreads = 0;
1316         for_each_td(td, i) {
1317                 int flags = 0;
1318
1319                 /*
1320                  * ->io_ops is NULL for a thread that has closed its
1321                  * io engine
1322                  */
1323                 if (td->io_ops && !strcmp(td->io_ops->name, "cpuio"))
1324                         cputhreads++;
1325                 else
1326                         realthreads++;
1327
1328                 if (!td->pid) {
1329                         pending++;
1330                         continue;
1331                 }
1332                 if (td->runstate == TD_REAPED)
1333                         continue;
1334                 if (td->o.use_thread) {
1335                         if (td->runstate == TD_EXITED) {
1336                                 td_set_runstate(td, TD_REAPED);
1337                                 goto reaped;
1338                         }
1339                         continue;
1340                 }
1341
1342                 flags = WNOHANG;
1343                 if (td->runstate == TD_EXITED)
1344                         flags = 0;
1345
1346                 /*
1347                  * check if someone quit or got killed in an unusual way
1348                  */
1349                 ret = waitpid(td->pid, &status, flags);
1350                 if (ret < 0) {
1351                         if (errno == ECHILD) {
1352                                 log_err("fio: pid=%d disappeared %d\n",
1353                                                 (int) td->pid, td->runstate);
1354                                 td_set_runstate(td, TD_REAPED);
1355                                 goto reaped;
1356                         }
1357                         perror("waitpid");
1358                 } else if (ret == td->pid) {
1359                         if (WIFSIGNALED(status)) {
1360                                 int sig = WTERMSIG(status);
1361
1362                                 if (sig != SIGTERM)
1363                                         log_err("fio: pid=%d, got signal=%d\n",
1364                                                         (int) td->pid, sig);
1365                                 td_set_runstate(td, TD_REAPED);
1366                                 goto reaped;
1367                         }
1368                         if (WIFEXITED(status)) {
1369                                 if (WEXITSTATUS(status) && !td->error)
1370                                         td->error = WEXITSTATUS(status);
1371
1372                                 td_set_runstate(td, TD_REAPED);
1373                                 goto reaped;
1374                         }
1375                 }
1376
1377                 /*
1378                  * thread is not dead, continue
1379                  */
1380                 pending++;
1381                 continue;
1382 reaped:
1383                 (*nr_running)--;
1384                 (*m_rate) -= (td->o.ratemin[0] + td->o.ratemin[1]);
1385                 (*t_rate) -= (td->o.rate[0] + td->o.rate[1]);
1386                 if (!td->pid)
1387                         pending--;
1388
1389                 if (td->error)
1390                         exit_value++;
1391
1392                 done_secs += mtime_since_now(&td->epoch) / 1000;
1393         }
1394
1395         if (*nr_running == cputhreads && !pending && realthreads)
1396                 terminate_threads(TERMINATE_ALL);
1397 }
1398
1399 static void *gtod_thread_main(void *data)
1400 {
1401         fio_mutex_up(startup_mutex);
1402
1403         /*
1404          * As long as we have jobs around, update the clock. It would be nice
1405          * to have some way of NOT hammering that CPU with gettimeofday(),
1406          * but I'm not sure what to use outside of a simple CPU nop to relax
1407          * it - we don't want to lose precision.
1408          */
1409         while (threads) {
1410                 fio_gtod_update();
1411                 nop;
1412         }
1413
1414         return NULL;
1415 }
1416
1417 static int fio_start_gtod_thread(void)
1418 {
1419         pthread_attr_t attr;
1420         int ret;
1421
1422         pthread_attr_init(&attr);
1423         pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN);
1424         ret = pthread_create(&gtod_thread, &attr, gtod_thread_main, NULL);
1425         pthread_attr_destroy(&attr);
1426         if (ret) {
1427                 log_err("Can't create gtod thread: %s\n", strerror(ret));
1428                 return 1;
1429         }
1430
1431         ret = pthread_detach(gtod_thread);
1432         if (ret) {
1433                 log_err("Can't detatch gtod thread: %s\n", strerror(ret));
1434                 return 1;
1435         }
1436
1437         dprint(FD_MUTEX, "wait on startup_mutex\n");
1438         fio_mutex_down(startup_mutex);
1439         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1440         return 0;
1441 }
1442
1443 /*
1444  * Main function for kicking off and reaping jobs, as needed.
1445  */
1446 static void run_threads(void)
1447 {
1448         struct thread_data *td;
1449         unsigned long spent;
1450         int i, todo, nr_running, m_rate, t_rate, nr_started;
1451
1452         if (fio_pin_memory())
1453                 return;
1454
1455         if (fio_gtod_offload && fio_start_gtod_thread())
1456                 return;
1457
1458         if (!terse_output) {
1459                 log_info("Starting ");
1460                 if (nr_thread)
1461                         log_info("%d thread%s", nr_thread,
1462                                                 nr_thread > 1 ? "s" : "");
1463                 if (nr_process) {
1464                         if (nr_thread)
1465                                 printf(" and ");
1466                         log_info("%d process%s", nr_process,
1467                                                 nr_process > 1 ? "es" : "");
1468                 }
1469                 log_info("\n");
1470                 fflush(stdout);
1471         }
1472
1473         set_sig_handlers();
1474
1475         todo = thread_number;
1476         nr_running = 0;
1477         nr_started = 0;
1478         m_rate = t_rate = 0;
1479
1480         for_each_td(td, i) {
1481                 print_status_init(td->thread_number - 1);
1482
1483                 if (!td->o.create_serialize) {
1484                         init_disk_util(td);
1485                         continue;
1486                 }
1487
1488                 /*
1489                  * do file setup here so it happens sequentially,
1490                  * we don't want X number of threads getting their
1491                  * client data interspersed on disk
1492                  */
1493                 if (setup_files(td)) {
1494                         exit_value++;
1495                         if (td->error)
1496                                 log_err("fio: pid=%d, err=%d/%s\n",
1497                                         (int) td->pid, td->error, td->verror);
1498                         td_set_runstate(td, TD_REAPED);
1499                         todo--;
1500                 } else {
1501                         struct fio_file *f;
1502                         unsigned int i;
1503
1504                         /*
1505                          * for sharing to work, each job must always open
1506                          * its own files. so close them, if we opened them
1507                          * for creation
1508                          */
1509                         for_each_file(td, f, i) {
1510                                 if (fio_file_open(f))
1511                                         td_io_close_file(td, f);
1512                         }
1513                 }
1514
1515                 init_disk_util(td);
1516         }
1517
1518         set_genesis_time();
1519
1520         while (todo) {
1521                 struct thread_data *map[MAX_JOBS];
1522                 struct timeval this_start;
1523                 int this_jobs = 0, left;
1524
1525                 /*
1526                  * create threads (TD_NOT_CREATED -> TD_CREATED)
1527                  */
1528                 for_each_td(td, i) {
1529                         if (td->runstate != TD_NOT_CREATED)
1530                                 continue;
1531
1532                         /*
1533                          * never got a chance to start, killed by other
1534                          * thread for some reason
1535                          */
1536                         if (td->terminate) {
1537                                 todo--;
1538                                 continue;
1539                         }
1540
1541                         if (td->o.start_delay) {
1542                                 spent = mtime_since_genesis();
1543
1544                                 if (td->o.start_delay * 1000 > spent)
1545                                         continue;
1546                         }
1547
1548                         if (td->o.stonewall && (nr_started || nr_running)) {
1549                                 dprint(FD_PROCESS, "%s: stonewall wait\n",
1550                                                         td->o.name);
1551                                 break;
1552                         }
1553
1554                         /*
1555                          * Set state to created. Thread will transition
1556                          * to TD_INITIALIZED when it's done setting up.
1557                          */
1558                         td_set_runstate(td, TD_CREATED);
1559                         map[this_jobs++] = td;
1560                         nr_started++;
1561
1562                         if (td->o.use_thread) {
1563                                 int ret;
1564
1565                                 dprint(FD_PROCESS, "will pthread_create\n");
1566                                 ret = pthread_create(&td->thread, NULL,
1567                                                         thread_main, td);
1568                                 if (ret) {
1569                                         log_err("pthread_create: %s\n",
1570                                                         strerror(ret));
1571                                         nr_started--;
1572                                         break;
1573                                 }
1574                                 ret = pthread_detach(td->thread);
1575                                 if (ret)
1576                                         log_err("pthread_detach: %s",
1577                                                         strerror(ret));
1578                         } else {
1579                                 pid_t pid;
1580                                 dprint(FD_PROCESS, "will fork\n");
1581                                 pid = fork();
1582                                 if (!pid) {
1583                                         int ret = fork_main(shm_id, i);
1584
1585                                         _exit(ret);
1586                                 } else if (i == fio_debug_jobno)
1587                                         *fio_debug_jobp = pid;
1588                         }
1589                         dprint(FD_MUTEX, "wait on startup_mutex\n");
1590                         if (fio_mutex_down_timeout(startup_mutex, 10)) {
1591                                 log_err("fio: job startup hung? exiting.\n");
1592                                 terminate_threads(TERMINATE_ALL);
1593                                 fio_abort = 1;
1594                                 nr_started--;
1595                                 break;
1596                         }
1597                         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1598                 }
1599
1600                 /*
1601                  * Wait for the started threads to transition to
1602                  * TD_INITIALIZED.
1603                  */
1604                 fio_gettime(&this_start, NULL);
1605                 left = this_jobs;
1606                 while (left && !fio_abort) {
1607                         if (mtime_since_now(&this_start) > JOB_START_TIMEOUT)
1608                                 break;
1609
1610                         usleep(100000);
1611
1612                         for (i = 0; i < this_jobs; i++) {
1613                                 td = map[i];
1614                                 if (!td)
1615                                         continue;
1616                                 if (td->runstate == TD_INITIALIZED) {
1617                                         map[i] = NULL;
1618                                         left--;
1619                                 } else if (td->runstate >= TD_EXITED) {
1620                                         map[i] = NULL;
1621                                         left--;
1622                                         todo--;
1623                                         nr_running++; /* work-around... */
1624                                 }
1625                         }
1626                 }
1627
1628                 if (left) {
1629                         log_err("fio: %d jobs failed to start\n", left);
1630                         for (i = 0; i < this_jobs; i++) {
1631                                 td = map[i];
1632                                 if (!td)
1633                                         continue;
1634                                 kill(td->pid, SIGTERM);
1635                         }
1636                         break;
1637                 }
1638
1639                 /*
1640                  * start created threads (TD_INITIALIZED -> TD_RUNNING).
1641                  */
1642                 for_each_td(td, i) {
1643                         if (td->runstate != TD_INITIALIZED)
1644                                 continue;
1645
1646                         if (in_ramp_time(td))
1647                                 td_set_runstate(td, TD_RAMP);
1648                         else
1649                                 td_set_runstate(td, TD_RUNNING);
1650                         nr_running++;
1651                         nr_started--;
1652                         m_rate += td->o.ratemin[0] + td->o.ratemin[1];
1653                         t_rate += td->o.rate[0] + td->o.rate[1];
1654                         todo--;
1655                         fio_mutex_up(td->mutex);
1656                 }
1657
1658                 reap_threads(&nr_running, &t_rate, &m_rate);
1659
1660                 if (todo)
1661                         usleep(100000);
1662         }
1663
1664         while (nr_running) {
1665                 reap_threads(&nr_running, &t_rate, &m_rate);
1666                 usleep(10000);
1667         }
1668
1669         update_io_ticks();
1670         fio_unpin_memory();
1671 }
1672
1673 int main(int argc, char *argv[])
1674 {
1675         long ps;
1676
1677         sinit();
1678         init_rand(&__fio_rand_state);
1679
1680         /*
1681          * We need locale for number printing, if it isn't set then just
1682          * go with the US format.
1683          */
1684         if (!getenv("LC_NUMERIC"))
1685                 setlocale(LC_NUMERIC, "en_US");
1686
1687         ps = sysconf(_SC_PAGESIZE);
1688         if (ps < 0) {
1689                 log_err("Failed to get page size\n");
1690                 return 1;
1691         }
1692
1693         page_size = ps;
1694         page_mask = ps - 1;
1695
1696         fio_keywords_init();
1697
1698         if (parse_options(argc, argv))
1699                 return 1;
1700
1701         if (exec_profile && load_profile(exec_profile))
1702                 return 1;
1703
1704         if (!thread_number)
1705                 return 0;
1706
1707         if (write_bw_log) {
1708                 setup_log(&agg_io_log[DDIR_READ]);
1709                 setup_log(&agg_io_log[DDIR_WRITE]);
1710         }
1711
1712         startup_mutex = fio_mutex_init(0);
1713         if (startup_mutex == NULL)
1714                 return 1;
1715         writeout_mutex = fio_mutex_init(1);
1716         if (writeout_mutex == NULL)
1717                 return 1;
1718
1719         set_genesis_time();
1720         create_disk_util_thread();
1721
1722         cgroup_list = smalloc(sizeof(*cgroup_list));
1723         INIT_FLIST_HEAD(cgroup_list);
1724
1725         run_threads();
1726
1727         if (!fio_abort) {
1728                 show_run_stats();
1729                 if (write_bw_log) {
1730                         __finish_log(agg_io_log[DDIR_READ], "agg-read_bw.log");
1731                         __finish_log(agg_io_log[DDIR_WRITE],
1732                                         "agg-write_bw.log");
1733                 }
1734         }
1735
1736         cgroup_kill(cgroup_list);
1737         sfree(cgroup_list);
1738         sfree(cgroup_mnt);
1739
1740         fio_mutex_remove(startup_mutex);
1741         fio_mutex_remove(writeout_mutex);
1742         return exit_value;
1743 }