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 #include "memalign.h"
  49
  50 unsigned long page_mask;
  51 unsigned long page_size;
  52
  53 #define PAGE_ALIGN(buf) \
  54         (char *) (((unsigned long) (buf) + page_mask) & ~page_mask)
  55
  56 int groupid = 0;
  57 int thread_number = 0;
  58 int nr_process = 0;
  59 int nr_thread = 0;
  60 int shm_id = 0;
  61 int temp_stall_ts;
  62 unsigned long done_secs = 0;
  63
  64 static struct fio_mutex *startup_mutex;
  65 static struct fio_mutex *writeout_mutex;
  66 static volatile int fio_abort;
  67 static int exit_value;
  68 static pthread_t gtod_thread;
  69 static pthread_t disk_util_thread;
  70 static struct flist_head *cgroup_list;
  71 static char *cgroup_mnt;
  72
  73 struct io_log *agg_io_log[2];
  74
  75 #define TERMINATE_ALL           (-1)
  76 #define JOB_START_TIMEOUT       (5 * 1000)
  77
  78 void td_set_runstate(struct thread_data *td, int runstate)
  79 {
  80         if (td->runstate == runstate)
  81                 return;
  82
  83         dprint(FD_PROCESS, "pid=%d: runstate %d -> %d\n", (int) td->pid,
  84                                                 td->runstate, runstate);
  85         td->runstate = runstate;
  86 }
  87
  88 static void terminate_threads(int group_id)
  89 {
  90         struct thread_data *td;
  91         int i;
  92
  93         dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
  94
  95         for_each_td(td, i) {
  96                 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
  97                         dprint(FD_PROCESS, "setting terminate on %s/%d\n",
  98                                                 td->o.name, (int) td->pid);
  99                         td->terminate = 1;
 100                         td->o.start_delay = 0;
 101
 102                         /*
 103                          * if the thread is running, just let it exit
 104                          */
 105                         if (td->runstate < TD_RAMP)
 106                                 kill(td->pid, SIGTERM);
 107                         else {
 108                                 struct ioengine_ops *ops = td->io_ops;
 109
 110                                 if (ops && (ops->flags & FIO_SIGTERM))
 111                                         kill(td->pid, SIGTERM);
 112                         }
 113                 }
 114         }
 115 }
 116
 117 static void sig_int(int sig)
 118 {
 119         if (threads) {
 120                 log_info("\nfio: terminating on signal %d\n", sig);
 121                 fflush(stdout);
 122                 exit_value = 128;
 123                 terminate_threads(TERMINATE_ALL);
 124         }
 125 }
 126
 127 static void *disk_thread_main(void *data)
 128 {
 129         fio_mutex_up(startup_mutex);
 130
 131         while (threads) {
 132                 usleep(DISK_UTIL_MSEC * 1000);
 133                 if (!threads)
 134                         break;
 135                 update_io_ticks();
 136                 print_thread_status();
 137         }
 138
 139         return NULL;
 140 }
 141
 142 static int create_disk_util_thread(void)
 143 {
 144         int ret;
 145
 146         ret = pthread_create(&disk_util_thread, NULL, disk_thread_main, NULL);
 147         if (ret) {
 148                 log_err("Can't create disk util thread: %s\n", strerror(ret));
 149                 return 1;
 150         }
 151
 152         ret = pthread_detach(disk_util_thread);
 153         if (ret) {
 154                 log_err("Can't detatch disk util thread: %s\n", strerror(ret));
 155                 return 1;
 156         }
 157
 158         dprint(FD_MUTEX, "wait on startup_mutex\n");
 159         fio_mutex_down(startup_mutex);
 160         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
 161         return 0;
 162 }
 163
 164 static void set_sig_handlers(void)
 165 {
 166         struct sigaction act;
 167
 168         memset(&act, 0, sizeof(act));
 169         act.sa_handler = sig_int;
 170         act.sa_flags = SA_RESTART;
 171         sigaction(SIGINT, &act, NULL);
 172
 173         memset(&act, 0, sizeof(act));
 174         act.sa_handler = sig_int;
 175         act.sa_flags = SA_RESTART;
 176         sigaction(SIGTERM, &act, NULL);
 177 }
 178
 179 /*
 180  * Check if we are above the minimum rate given.
 181  */
 182 static int __check_min_rate(struct thread_data *td, struct timeval *now,
 183                             enum fio_ddir ddir)
 184 {
 185         unsigned long long bytes = 0;
 186         unsigned long iops = 0;
 187         unsigned long spent;
 188         unsigned long rate;
 189         unsigned int ratemin = 0;
 190         unsigned int rate_iops = 0;
 191         unsigned int rate_iops_min = 0;
 192
 193         assert(ddir_rw(ddir));
 194
 195         if (!td->o.ratemin[ddir] && !td->o.rate_iops_min[ddir])
 196                 return 0;
 197
 198         /*
 199          * allow a 2 second settle period in the beginning
 200          */
 201         if (mtime_since(&td->start, now) < 2000)
 202                 return 0;
 203
 204         iops += td->io_blocks[ddir];
 205         bytes += td->this_io_bytes[ddir];
 206         ratemin += td->o.ratemin[ddir];
 207         rate_iops += td->o.rate_iops[ddir];
 208         rate_iops_min += td->o.rate_iops_min[ddir];
 209
 210         /*
 211          * if rate blocks is set, sample is running
 212          */
 213         if (td->rate_bytes[ddir] || td->rate_blocks[ddir]) {
 214                 spent = mtime_since(&td->lastrate[ddir], now);
 215                 if (spent < td->o.ratecycle)
 216                         return 0;
 217
 218                 if (td->o.rate[ddir]) {
 219                         /*
 220                          * check bandwidth specified rate
 221                          */
 222                         if (bytes < td->rate_bytes[ddir]) {
 223                                 log_err("%s: min rate %u not met\n", td->o.name,
 224                                                                 ratemin);
 225                                 return 1;
 226                         } else {
 227                                 rate = ((bytes - td->rate_bytes[ddir]) * 1000) / spent;
 228                                 if (rate < ratemin ||
 229                                     bytes < td->rate_bytes[ddir]) {
 230                                         log_err("%s: min rate %u not met, got"
 231                                                 " %luKB/sec\n", td->o.name,
 232                                                         ratemin, rate);
 233                                         return 1;
 234                                 }
 235                         }
 236                 } else {
 237                         /*
 238                          * checks iops specified rate
 239                          */
 240                         if (iops < rate_iops) {
 241                                 log_err("%s: min iops rate %u not met\n",
 242                                                 td->o.name, rate_iops);
 243                                 return 1;
 244                         } else {
 245                                 rate = ((iops - td->rate_blocks[ddir]) * 1000) / spent;
 246                                 if (rate < rate_iops_min ||
 247                                     iops < td->rate_blocks[ddir]) {
 248                                         log_err("%s: min iops rate %u not met,"
 249                                                 " got %lu\n", td->o.name,
 250                                                         rate_iops_min, rate);
 251                                 }
 252                         }
 253                 }
 254         }
 255
 256         td->rate_bytes[ddir] = bytes;
 257         td->rate_blocks[ddir] = iops;
 258         memcpy(&td->lastrate[ddir], now, sizeof(*now));
 259         return 0;
 260 }
 261
 262 static int check_min_rate(struct thread_data *td, struct timeval *now,
 263                           unsigned long *bytes_done)
 264 {
 265         int ret = 0;
 266
 267         if (bytes_done[0])
 268                 ret |= __check_min_rate(td, now, 0);
 269         if (bytes_done[1])
 270                 ret |= __check_min_rate(td, now, 1);
 271
 272         return ret;
 273 }
 274
 275 static inline int runtime_exceeded(struct thread_data *td, struct timeval *t)
 276 {
 277         if (!td->o.timeout)
 278                 return 0;
 279         if (mtime_since(&td->epoch, t) >= td->o.timeout * 1000)
 280                 return 1;
 281
 282         return 0;
 283 }
 284
 285 /*
 286  * When job exits, we can cancel the in-flight IO if we are using async
 287  * io. Attempt to do so.
 288  */
 289 static void cleanup_pending_aio(struct thread_data *td)
 290 {
 291         struct flist_head *entry, *n;
 292         struct io_u *io_u;
 293         int r;
 294
 295         /*
 296          * get immediately available events, if any
 297          */
 298         r = io_u_queued_complete(td, 0, NULL);
 299         if (r < 0)
 300                 return;
 301
 302         /*
 303          * now cancel remaining active events
 304          */
 305         if (td->io_ops->cancel) {
 306                 flist_for_each_safe(entry, n, &td->io_u_busylist) {
 307                         io_u = flist_entry(entry, struct io_u, list);
 308
 309                         /*
 310                          * if the io_u isn't in flight, then that generally
 311                          * means someone leaked an io_u. complain but fix
 312                          * it up, so we don't stall here.
 313                          */
 314                         if ((io_u->flags & IO_U_F_FLIGHT) == 0) {
 315                                 log_err("fio: non-busy IO on busy list\n");
 316                                 put_io_u(td, io_u);
 317                         } else {
 318                                 r = td->io_ops->cancel(td, io_u);
 319                                 if (!r)
 320                                         put_io_u(td, io_u);
 321                         }
 322                 }
 323         }
 324
 325         if (td->cur_depth)
 326                 r = io_u_queued_complete(td, td->cur_depth, NULL);
 327 }
 328
 329 /*
 330  * Helper to handle the final sync of a file. Works just like the normal
 331  * io path, just does everything sync.
 332  */
 333 static int fio_io_sync(struct thread_data *td, struct fio_file *f)
 334 {
 335         struct io_u *io_u = __get_io_u(td);
 336         int ret;
 337
 338         if (!io_u)
 339                 return 1;
 340
 341         io_u->ddir = DDIR_SYNC;
 342         io_u->file = f;
 343
 344         if (td_io_prep(td, io_u)) {
 345                 put_io_u(td, io_u);
 346                 return 1;
 347         }
 348
 349 requeue:
 350         ret = td_io_queue(td, io_u);
 351         if (ret < 0) {
 352                 td_verror(td, io_u->error, "td_io_queue");
 353                 put_io_u(td, io_u);
 354                 return 1;
 355         } else if (ret == FIO_Q_QUEUED) {
 356                 if (io_u_queued_complete(td, 1, NULL) < 0)
 357                         return 1;
 358         } else if (ret == FIO_Q_COMPLETED) {
 359                 if (io_u->error) {
 360                         td_verror(td, io_u->error, "td_io_queue");
 361                         return 1;
 362                 }
 363
 364                 if (io_u_sync_complete(td, io_u, NULL) < 0)
 365                         return 1;
 366         } else if (ret == FIO_Q_BUSY) {
 367                 if (td_io_commit(td))
 368                         return 1;
 369                 goto requeue;
 370         }
 371
 372         return 0;
 373 }
 374
 375 static inline void __update_tv_cache(struct thread_data *td)
 376 {
 377         fio_gettime(&td->tv_cache, NULL);
 378 }
 379
 380 static inline void update_tv_cache(struct thread_data *td)
 381 {
 382         if ((++td->tv_cache_nr & td->tv_cache_mask) == td->tv_cache_mask)
 383                 __update_tv_cache(td);
 384 }
 385
 386 static int break_on_this_error(struct thread_data *td, int *retptr)
 387 {
 388         int ret = *retptr;
 389
 390         if (ret < 0 || td->error) {
 391                 int err;
 392
 393                 if (!td->o.continue_on_error)
 394                         return 1;
 395
 396                 if (ret < 0)
 397                         err = -ret;
 398                 else
 399                         err = td->error;
 400
 401                 if (td_non_fatal_error(err)) {
 402                         /*
 403                          * Continue with the I/Os in case of
 404                          * a non fatal error.
 405                          */
 406                         update_error_count(td, err);
 407                         td_clear_error(td);
 408                         *retptr = 0;
 409                         return 0;
 410                 } else if (td->o.fill_device && err == ENOSPC) {
 411                         /*
 412                          * We expect to hit this error if
 413                          * fill_device option is set.
 414                          */
 415                         td_clear_error(td);
 416                         td->terminate = 1;
 417                         return 1;
 418                 } else {
 419                         /*
 420                          * Stop the I/O in case of a fatal
 421                          * error.
 422                          */
 423                         update_error_count(td, err);
 424                         return 1;
 425                 }
 426         }
 427
 428         return 0;
 429 }
 430
 431 /*
 432  * The main verify engine. Runs over the writes we previously submitted,
 433  * reads the blocks back in, and checks the crc/md5 of the data.
 434  */
 435 static void do_verify(struct thread_data *td)
 436 {
 437         struct fio_file *f;
 438         struct io_u *io_u;
 439         int ret, min_events;
 440         unsigned int i;
 441
 442         dprint(FD_VERIFY, "starting loop\n");
 443
 444         /*
 445          * sync io first and invalidate cache, to make sure we really
 446          * read from disk.
 447          */
 448         for_each_file(td, f, i) {
 449                 if (!fio_file_open(f))
 450                         continue;
 451                 if (fio_io_sync(td, f))
 452                         break;
 453                 if (file_invalidate_cache(td, f))
 454                         break;
 455         }
 456
 457         if (td->error)
 458                 return;
 459
 460         td_set_runstate(td, TD_VERIFYING);
 461
 462         io_u = NULL;
 463         while (!td->terminate) {
 464                 int ret2, full;
 465
 466                 update_tv_cache(td);
 467
 468                 if (runtime_exceeded(td, &td->tv_cache)) {
 469                         __update_tv_cache(td);
 470                         if (runtime_exceeded(td, &td->tv_cache)) {
 471                                 td->terminate = 1;
 472                                 break;
 473                         }
 474                 }
 475
 476                 io_u = __get_io_u(td);
 477                 if (!io_u)
 478                         break;
 479
 480                 if (get_next_verify(td, io_u)) {
 481                         put_io_u(td, io_u);
 482                         break;
 483                 }
 484
 485                 if (td_io_prep(td, io_u)) {
 486                         put_io_u(td, io_u);
 487                         break;
 488                 }
 489
 490                 if (td->o.verify_async)
 491                         io_u->end_io = verify_io_u_async;
 492                 else
 493                         io_u->end_io = verify_io_u;
 494
 495                 ret = td_io_queue(td, io_u);
 496                 switch (ret) {
 497                 case FIO_Q_COMPLETED:
 498                         if (io_u->error) {
 499                                 ret = -io_u->error;
 500                                 clear_io_u(td, io_u);
 501                         } else if (io_u->resid) {
 502                                 int bytes = io_u->xfer_buflen - io_u->resid;
 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                                 f = io_u->file;
 521                                 if (io_u->offset == f->real_file_size)
 522                                         goto sync_done;
 523
 524                                 requeue_io_u(td, &io_u);
 525                         } else {
 526 sync_done:
 527                                 ret = io_u_sync_complete(td, io_u, NULL);
 528                                 if (ret < 0)
 529                                         break;
 530                         }
 531                         continue;
 532                 case FIO_Q_QUEUED:
 533                         break;
 534                 case FIO_Q_BUSY:
 535                         requeue_io_u(td, &io_u);
 536                         ret2 = td_io_commit(td);
 537                         if (ret2 < 0)
 538                                 ret = ret2;
 539                         break;
 540                 default:
 541                         assert(ret < 0);
 542                         td_verror(td, -ret, "td_io_queue");
 543                         break;
 544                 }
 545
 546                 if (break_on_this_error(td, &ret))
 547                         break;
 548
 549                 /*
 550                  * if we can queue more, do so. but check if there are
 551                  * completed io_u's first.
 552                  */
 553                 full = queue_full(td) || ret == FIO_Q_BUSY;
 554                 if (full || !td->o.iodepth_batch_complete) {
 555                         min_events = min(td->o.iodepth_batch_complete,
 556                                          td->cur_depth);
 557                         if (full && !min_events)
 558                                 min_events = 1;
 559
 560                         do {
 561                                 /*
 562                                  * Reap required number of io units, if any,
 563                                  * and do the verification on them through
 564                                  * the callback handler
 565                                  */
 566                                 if (io_u_queued_complete(td, min_events, NULL) < 0) {
 567                                         ret = -1;
 568                                         break;
 569                                 }
 570                         } while (full && (td->cur_depth > td->o.iodepth_low));
 571                 }
 572                 if (ret < 0)
 573                         break;
 574         }
 575
 576         if (!td->error) {
 577                 min_events = td->cur_depth;
 578
 579                 if (min_events)
 580                         ret = io_u_queued_complete(td, min_events, NULL);
 581         } else
 582                 cleanup_pending_aio(td);
 583
 584         td_set_runstate(td, TD_RUNNING);
 585
 586         dprint(FD_VERIFY, "exiting loop\n");
 587 }
 588
 589 /*
 590  * Main IO worker function. It retrieves io_u's to process and queues
 591  * and reaps them, checking for rate and errors along the way.
 592  */
 593 static void do_io(struct thread_data *td)
 594 {
 595         unsigned int i;
 596         int ret = 0;
 597
 598         if (in_ramp_time(td))
 599                 td_set_runstate(td, TD_RAMP);
 600         else
 601                 td_set_runstate(td, TD_RUNNING);
 602
 603         while ( (td->o.read_iolog_file && !flist_empty(&td->io_log_list)) ||
 604                 (!flist_empty(&td->trim_list)) ||
 605                 ((td->this_io_bytes[0] + td->this_io_bytes[1]) < td->o.size) ) {
 606                 struct timeval comp_time;
 607                 unsigned long bytes_done[2] = { 0, 0 };
 608                 int min_evts = 0;
 609                 struct io_u *io_u;
 610                 int ret2, full;
 611
 612                 if (td->terminate)
 613                         break;
 614
 615                 update_tv_cache(td);
 616
 617                 if (runtime_exceeded(td, &td->tv_cache)) {
 618                         __update_tv_cache(td);
 619                         if (runtime_exceeded(td, &td->tv_cache)) {
 620                                 td->terminate = 1;
 621                                 break;
 622                         }
 623                 }
 624
 625                 io_u = get_io_u(td);
 626                 if (!io_u)
 627                         break;
 628
 629                 /*
 630                  * Add verification end_io handler, if asked to verify
 631                  * a previously written file.
 632                  */
 633                 if (td->o.verify != VERIFY_NONE && io_u->ddir == DDIR_READ &&
 634                     !td_rw(td)) {
 635                         if (td->o.verify_async)
 636                                 io_u->end_io = verify_io_u_async;
 637                         else
 638                                 io_u->end_io = verify_io_u;
 639                         td_set_runstate(td, TD_VERIFYING);
 640                 } else if (in_ramp_time(td))
 641                         td_set_runstate(td, TD_RAMP);
 642                 else
 643                         td_set_runstate(td, TD_RUNNING);
 644
 645                 ret = td_io_queue(td, io_u);
 646                 switch (ret) {
 647                 case FIO_Q_COMPLETED:
 648                         if (io_u->error) {
 649                                 ret = -io_u->error;
 650                                 clear_io_u(td, io_u);
 651                         } else if (io_u->resid) {
 652                                 int bytes = io_u->xfer_buflen - io_u->resid;
 653                                 struct fio_file *f = io_u->file;
 654
 655                                 /*
 656                                  * zero read, fail
 657                                  */
 658                                 if (!bytes) {
 659                                         td_verror(td, EIO, "full resid");
 660                                         put_io_u(td, io_u);
 661                                         break;
 662                                 }
 663
 664                                 io_u->xfer_buflen = io_u->resid;
 665                                 io_u->xfer_buf += bytes;
 666                                 io_u->offset += bytes;
 667
 668                                 if (ddir_rw(io_u->ddir))
 669                                         td->ts.short_io_u[io_u->ddir]++;
 670
 671                                 if (io_u->offset == f->real_file_size)
 672                                         goto sync_done;
 673
 674                                 requeue_io_u(td, &io_u);
 675                         } else {
 676 sync_done:
 677                                 if (__should_check_rate(td, 0) ||
 678                                     __should_check_rate(td, 1))
 679                                         fio_gettime(&comp_time, NULL);
 680
 681                                 ret = io_u_sync_complete(td, io_u, bytes_done);
 682                                 if (ret < 0)
 683                                         break;
 684                         }
 685                         break;
 686                 case FIO_Q_QUEUED:
 687                         /*
 688                          * if the engine doesn't have a commit hook,
 689                          * the io_u is really queued. if it does have such
 690                          * a hook, it has to call io_u_queued() itself.
 691                          */
 692                         if (td->io_ops->commit == NULL)
 693                                 io_u_queued(td, io_u);
 694                         break;
 695                 case FIO_Q_BUSY:
 696                         requeue_io_u(td, &io_u);
 697                         ret2 = td_io_commit(td);
 698                         if (ret2 < 0)
 699                                 ret = ret2;
 700                         break;
 701                 default:
 702                         assert(ret < 0);
 703                         put_io_u(td, io_u);
 704                         break;
 705                 }
 706
 707                 if (break_on_this_error(td, &ret))
 708                         break;
 709
 710                 /*
 711                  * See if we need to complete some commands
 712                  */
 713                 full = queue_full(td) || ret == FIO_Q_BUSY;
 714                 if (full || !td->o.iodepth_batch_complete) {
 715                         min_evts = min(td->o.iodepth_batch_complete,
 716                                         td->cur_depth);
 717                         if (full && !min_evts)
 718                                 min_evts = 1;
 719
 720                         if (__should_check_rate(td, 0) ||
 721                             __should_check_rate(td, 1))
 722                                 fio_gettime(&comp_time, NULL);
 723
 724                         do {
 725                                 ret = io_u_queued_complete(td, min_evts, bytes_done);
 726                                 if (ret < 0)
 727                                         break;
 728
 729                         } while (full && (td->cur_depth > td->o.iodepth_low));
 730                 }
 731
 732                 if (ret < 0)
 733                         break;
 734                 if (!(bytes_done[0] + bytes_done[1]))
 735                         continue;
 736
 737                 if (!in_ramp_time(td) && should_check_rate(td, bytes_done)) {
 738                         if (check_min_rate(td, &comp_time, bytes_done)) {
 739                                 if (exitall_on_terminate)
 740                                         terminate_threads(td->groupid);
 741                                 td_verror(td, EIO, "check_min_rate");
 742                                 break;
 743                         }
 744                 }
 745
 746                 if (td->o.thinktime) {
 747                         unsigned long long b;
 748
 749                         b = td->io_blocks[0] + td->io_blocks[1];
 750                         if (!(b % td->o.thinktime_blocks)) {
 751                                 int left;
 752
 753                                 if (td->o.thinktime_spin)
 754                                         usec_spin(td->o.thinktime_spin);
 755
 756                                 left = td->o.thinktime - td->o.thinktime_spin;
 757                                 if (left)
 758                                         usec_sleep(td, left);
 759                         }
 760                 }
 761         }
 762
 763         if (td->trim_entries)
 764                 printf("trim entries %ld\n", td->trim_entries);
 765
 766         if (td->o.fill_device && td->error == ENOSPC) {
 767                 td->error = 0;
 768                 td->terminate = 1;
 769         }
 770         if (!td->error) {
 771                 struct fio_file *f;
 772
 773                 i = td->cur_depth;
 774                 if (i) {
 775                         ret = io_u_queued_complete(td, i, NULL);
 776                         if (td->o.fill_device && td->error == ENOSPC)
 777                                 td->error = 0;
 778                 }
 779
 780                 if (should_fsync(td) && td->o.end_fsync) {
 781                         td_set_runstate(td, TD_FSYNCING);
 782
 783                         for_each_file(td, f, i) {
 784                                 if (!fio_file_open(f))
 785                                         continue;
 786                                 fio_io_sync(td, f);
 787                         }
 788                 }
 789         } else
 790                 cleanup_pending_aio(td);
 791
 792         /*
 793          * stop job if we failed doing any IO
 794          */
 795         if ((td->this_io_bytes[0] + td->this_io_bytes[1]) == 0)
 796                 td->done = 1;
 797 }
 798
 799 static void cleanup_io_u(struct thread_data *td)
 800 {
 801         struct flist_head *entry, *n;
 802         struct io_u *io_u;
 803
 804         flist_for_each_safe(entry, n, &td->io_u_freelist) {
 805                 io_u = flist_entry(entry, struct io_u, list);
 806
 807                 flist_del(&io_u->list);
 808                 fio_memfree(io_u, sizeof(*io_u));
 809         }
 810
 811         free_io_mem(td);
 812 }
 813
 814 static int init_io_u(struct thread_data *td)
 815 {
 816         struct io_u *io_u;
 817         unsigned int max_bs;
 818         int cl_align, i, max_units;
 819         char *p;
 820
 821         max_units = td->o.iodepth;
 822         max_bs = max(td->o.max_bs[DDIR_READ], td->o.max_bs[DDIR_WRITE]);
 823         td->orig_buffer_size = (unsigned long long) max_bs
 824                                         * (unsigned long long) max_units;
 825
 826         if (td->o.mem_type == MEM_SHMHUGE || td->o.mem_type == MEM_MMAPHUGE) {
 827                 unsigned long bs;
 828
 829                 bs = td->orig_buffer_size + td->o.hugepage_size - 1;
 830                 td->orig_buffer_size = bs & ~(td->o.hugepage_size - 1);
 831         }
 832
 833         if (td->orig_buffer_size != (size_t) td->orig_buffer_size) {
 834                 log_err("fio: IO memory too large. Reduce max_bs or iodepth\n");
 835                 return 1;
 836         }
 837
 838         if (allocate_io_mem(td))
 839                 return 1;
 840
 841         if (td->o.odirect || td->o.mem_align ||
 842             (td->io_ops->flags & FIO_RAWIO))
 843                 p = PAGE_ALIGN(td->orig_buffer) + td->o.mem_align;
 844         else
 845                 p = td->orig_buffer;
 846
 847         cl_align = os_cache_line_size();
 848
 849         for (i = 0; i < max_units; i++) {
 850                 void *ptr;
 851
 852                 if (td->terminate)
 853                         return 1;
 854
 855                 ptr = fio_memalign(cl_align, sizeof(*io_u));
 856                 if (!ptr) {
 857                         log_err("fio: unable to allocate aligned memory\n");
 858                         break;
 859                 }
 860
 861                 io_u = ptr;
 862                 memset(io_u, 0, sizeof(*io_u));
 863                 INIT_FLIST_HEAD(&io_u->list);
 864                 dprint(FD_MEM, "io_u alloc %p, index %u\n", io_u, i);
 865
 866                 if (!(td->io_ops->flags & FIO_NOIO)) {
 867                         io_u->buf = p + max_bs * i;
 868                         dprint(FD_MEM, "io_u %p, mem %p\n", io_u, io_u->buf);
 869
 870                         if (td_write(td) && !td->o.refill_buffers)
 871                                 io_u_fill_buffer(td, io_u, max_bs);
 872                         else if (td_write(td) && td->o.verify_pattern_bytes) {
 873                                 /*
 874                                  * Fill the buffer with the pattern if we are
 875                                  * going to be doing writes.
 876                                  */
 877                                 fill_pattern(td, io_u->buf, max_bs, io_u, 0, 0);
 878                         }
 879                 }
 880
 881                 io_u->index = i;
 882                 io_u->flags = IO_U_F_FREE;
 883                 flist_add(&io_u->list, &td->io_u_freelist);
 884         }
 885
 886         return 0;
 887 }
 888
 889 static int switch_ioscheduler(struct thread_data *td)
 890 {
 891         char tmp[256], tmp2[128];
 892         FILE *f;
 893         int ret;
 894
 895         if (td->io_ops->flags & FIO_DISKLESSIO)
 896                 return 0;
 897
 898         sprintf(tmp, "%s/queue/scheduler", td->sysfs_root);
 899
 900         f = fopen(tmp, "r+");
 901         if (!f) {
 902                 if (errno == ENOENT) {
 903                         log_err("fio: os or kernel doesn't support IO scheduler"
 904                                 " switching\n");
 905                         return 0;
 906                 }
 907                 td_verror(td, errno, "fopen iosched");
 908                 return 1;
 909         }
 910
 911         /*
 912          * Set io scheduler.
 913          */
 914         ret = fwrite(td->o.ioscheduler, strlen(td->o.ioscheduler), 1, f);
 915         if (ferror(f) || ret != 1) {
 916                 td_verror(td, errno, "fwrite");
 917                 fclose(f);
 918                 return 1;
 919         }
 920
 921         rewind(f);
 922
 923         /*
 924          * Read back and check that the selected scheduler is now the default.
 925          */
 926         ret = fread(tmp, 1, sizeof(tmp), f);
 927         if (ferror(f) || ret < 0) {
 928                 td_verror(td, errno, "fread");
 929                 fclose(f);
 930                 return 1;
 931         }
 932
 933         sprintf(tmp2, "[%s]", td->o.ioscheduler);
 934         if (!strstr(tmp, tmp2)) {
 935                 log_err("fio: io scheduler %s not found\n", td->o.ioscheduler);
 936                 td_verror(td, EINVAL, "iosched_switch");
 937                 fclose(f);
 938                 return 1;
 939         }
 940
 941         fclose(f);
 942         return 0;
 943 }
 944
 945 static int keep_running(struct thread_data *td)
 946 {
 947         unsigned long long io_done;
 948
 949         if (td->done)
 950                 return 0;
 951         if (td->o.time_based)
 952                 return 1;
 953         if (td->o.loops) {
 954                 td->o.loops--;
 955                 return 1;
 956         }
 957
 958         io_done = td->io_bytes[DDIR_READ] + td->io_bytes[DDIR_WRITE]
 959                         + td->io_skip_bytes;
 960         if (io_done < td->o.size)
 961                 return 1;
 962
 963         return 0;
 964 }
 965
 966 static void reset_io_counters(struct thread_data *td)
 967 {
 968         td->ts.stat_io_bytes[0] = td->ts.stat_io_bytes[1] = 0;
 969         td->this_io_bytes[0] = td->this_io_bytes[1] = 0;
 970         td->zone_bytes = 0;
 971         td->rate_bytes[0] = td->rate_bytes[1] = 0;
 972         td->rate_blocks[0] = td->rate_blocks[1] = 0;
 973
 974         td->last_was_sync = 0;
 975
 976         /*
 977          * reset file done count if we are to start over
 978          */
 979         if (td->o.time_based || td->o.loops)
 980                 td->nr_done_files = 0;
 981 }
 982
 983 void reset_all_stats(struct thread_data *td)
 984 {
 985         struct timeval tv;
 986         int i;
 987
 988         reset_io_counters(td);
 989
 990         for (i = 0; i < 2; i++) {
 991                 td->io_bytes[i] = 0;
 992                 td->io_blocks[i] = 0;
 993                 td->io_issues[i] = 0;
 994                 td->ts.total_io_u[i] = 0;
 995         }
 996
 997         fio_gettime(&tv, NULL);
 998         td->ts.runtime[0] = 0;
 999         td->ts.runtime[1] = 0;
1000         memcpy(&td->epoch, &tv, sizeof(tv));
1001         memcpy(&td->start, &tv, sizeof(tv));
1002 }
1003
1004 static void clear_io_state(struct thread_data *td)
1005 {
1006         struct fio_file *f;
1007         unsigned int i;
1008
1009         reset_io_counters(td);
1010
1011         close_files(td);
1012         for_each_file(td, f, i)
1013                 fio_file_clear_done(f);
1014
1015         /*
1016          * Set the same seed to get repeatable runs
1017          */
1018         td_fill_rand_seeds(td);
1019 }
1020
1021 static int exec_string(const char *string)
1022 {
1023         int ret, newlen = strlen(string) + 1 + 8;
1024         char *str;
1025
1026         str = malloc(newlen);
1027         sprintf(str, "sh -c %s", string);
1028
1029         ret = system(str);
1030         if (ret == -1)
1031                 log_err("fio: exec of cmd <%s> failed\n", str);
1032
1033         free(str);
1034         return ret;
1035 }
1036
1037 /*
1038  * Entry point for the thread based jobs. The process based jobs end up
1039  * here as well, after a little setup.
1040  */
1041 static void *thread_main(void *data)
1042 {
1043         unsigned long long elapsed;
1044         struct thread_data *td = data;
1045         pthread_condattr_t attr;
1046         int clear_state;
1047
1048         if (!td->o.use_thread)
1049                 setsid();
1050
1051         td->pid = getpid();
1052
1053         dprint(FD_PROCESS, "jobs pid=%d started\n", (int) td->pid);
1054
1055         INIT_FLIST_HEAD(&td->io_u_freelist);
1056         INIT_FLIST_HEAD(&td->io_u_busylist);
1057         INIT_FLIST_HEAD(&td->io_u_requeues);
1058         INIT_FLIST_HEAD(&td->io_log_list);
1059         INIT_FLIST_HEAD(&td->io_hist_list);
1060         INIT_FLIST_HEAD(&td->verify_list);
1061         INIT_FLIST_HEAD(&td->trim_list);
1062         pthread_mutex_init(&td->io_u_lock, NULL);
1063         td->io_hist_tree = RB_ROOT;
1064
1065         pthread_condattr_init(&attr);
1066         pthread_cond_init(&td->verify_cond, &attr);
1067         pthread_cond_init(&td->free_cond, &attr);
1068
1069         td_set_runstate(td, TD_INITIALIZED);
1070         dprint(FD_MUTEX, "up startup_mutex\n");
1071         fio_mutex_up(startup_mutex);
1072         dprint(FD_MUTEX, "wait on td->mutex\n");
1073         fio_mutex_down(td->mutex);
1074         dprint(FD_MUTEX, "done waiting on td->mutex\n");
1075
1076         /*
1077          * the ->mutex mutex is now no longer used, close it to avoid
1078          * eating a file descriptor
1079          */
1080         fio_mutex_remove(td->mutex);
1081
1082         /*
1083          * A new gid requires privilege, so we need to do this before setting
1084          * the uid.
1085          */
1086         if (td->o.gid != -1U && setgid(td->o.gid)) {
1087                 td_verror(td, errno, "setgid");
1088                 goto err;
1089         }
1090         if (td->o.uid != -1U && setuid(td->o.uid)) {
1091                 td_verror(td, errno, "setuid");
1092                 goto err;
1093         }
1094
1095         /*
1096          * If we have a gettimeofday() thread, make sure we exclude that
1097          * thread from this job
1098          */
1099         if (td->o.gtod_cpu)
1100                 fio_cpu_clear(&td->o.cpumask, td->o.gtod_cpu);
1101
1102         /*
1103          * Set affinity first, in case it has an impact on the memory
1104          * allocations.
1105          */
1106         if (td->o.cpumask_set && fio_setaffinity(td->pid, td->o.cpumask) == -1) {
1107                 td_verror(td, errno, "cpu_set_affinity");
1108                 goto err;
1109         }
1110
1111         /*
1112          * May alter parameters that init_io_u() will use, so we need to
1113          * do this first.
1114          */
1115         if (init_iolog(td))
1116                 goto err;
1117
1118         if (init_io_u(td))
1119                 goto err;
1120
1121         if (td->o.verify_async && verify_async_init(td))
1122                 goto err;
1123
1124         if (td->ioprio_set) {
1125                 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, td->ioprio) == -1) {
1126                         td_verror(td, errno, "ioprio_set");
1127                         goto err;
1128                 }
1129         }
1130
1131         if (td->o.cgroup_weight && cgroup_setup(td, cgroup_list, &cgroup_mnt))
1132                 goto err;
1133
1134         if (nice(td->o.nice) == -1) {
1135                 td_verror(td, errno, "nice");
1136                 goto err;
1137         }
1138
1139         if (td->o.ioscheduler && switch_ioscheduler(td))
1140                 goto err;
1141
1142         if (!td->o.create_serialize && setup_files(td))
1143                 goto err;
1144
1145         if (td_io_init(td))
1146                 goto err;
1147
1148         if (init_random_map(td))
1149                 goto err;
1150
1151         if (td->o.exec_prerun) {
1152                 if (exec_string(td->o.exec_prerun))
1153                         goto err;
1154         }
1155
1156         if (td->o.pre_read) {
1157                 if (pre_read_files(td) < 0)
1158                         goto err;
1159         }
1160
1161         fio_gettime(&td->epoch, NULL);
1162         getrusage(RUSAGE_SELF, &td->ts.ru_start);
1163
1164         clear_state = 0;
1165         while (keep_running(td)) {
1166                 fio_gettime(&td->start, NULL);
1167                 memcpy(&td->ts.stat_sample_time[0], &td->start,
1168                                 sizeof(td->start));
1169                 memcpy(&td->ts.stat_sample_time[1], &td->start,
1170                                 sizeof(td->start));
1171                 memcpy(&td->tv_cache, &td->start, sizeof(td->start));
1172
1173                 if (td->o.ratemin[0] || td->o.ratemin[1])
1174                         memcpy(&td->lastrate, &td->ts.stat_sample_time,
1175                                                         sizeof(td->lastrate));
1176
1177                 if (clear_state)
1178                         clear_io_state(td);
1179
1180                 prune_io_piece_log(td);
1181
1182                 do_io(td);
1183
1184                 clear_state = 1;
1185
1186                 if (td_read(td) && td->io_bytes[DDIR_READ]) {
1187                         elapsed = utime_since_now(&td->start);
1188                         td->ts.runtime[DDIR_READ] += elapsed;
1189                 }
1190                 if (td_write(td) && td->io_bytes[DDIR_WRITE]) {
1191                         elapsed = utime_since_now(&td->start);
1192                         td->ts.runtime[DDIR_WRITE] += elapsed;
1193                 }
1194
1195                 if (td->error || td->terminate)
1196                         break;
1197
1198                 if (!td->o.do_verify ||
1199                     td->o.verify == VERIFY_NONE ||
1200                     (td->io_ops->flags & FIO_UNIDIR))
1201                         continue;
1202
1203                 clear_io_state(td);
1204
1205                 fio_gettime(&td->start, NULL);
1206
1207                 do_verify(td);
1208
1209                 td->ts.runtime[DDIR_READ] += utime_since_now(&td->start);
1210
1211                 if (td->error || td->terminate)
1212                         break;
1213         }
1214
1215         update_rusage_stat(td);
1216         td->ts.runtime[0] = (td->ts.runtime[0] + 999) / 1000;
1217         td->ts.runtime[1] = (td->ts.runtime[1] + 999) / 1000;
1218         td->ts.total_run_time = mtime_since_now(&td->epoch);
1219         td->ts.io_bytes[0] = td->io_bytes[0];
1220         td->ts.io_bytes[1] = td->io_bytes[1];
1221
1222         fio_mutex_down(writeout_mutex);
1223         if (td->ts.bw_log) {
1224                 if (td->o.bw_log_file) {
1225                         finish_log_named(td, td->ts.bw_log,
1226                                                 td->o.bw_log_file, "bw");
1227                 } else
1228                         finish_log(td, td->ts.bw_log, "bw");
1229         }
1230         if (td->ts.lat_log) {
1231                 if (td->o.lat_log_file) {
1232                         finish_log_named(td, td->ts.lat_log,
1233                                                 td->o.lat_log_file, "lat");
1234                 } else
1235                         finish_log(td, td->ts.lat_log, "lat");
1236         }
1237         if (td->ts.slat_log) {
1238                 if (td->o.lat_log_file) {
1239                         finish_log_named(td, td->ts.slat_log,
1240                                                 td->o.lat_log_file, "slat");
1241                 } else
1242                         finish_log(td, td->ts.slat_log, "slat");
1243         }
1244         if (td->ts.clat_log) {
1245                 if (td->o.lat_log_file) {
1246                         finish_log_named(td, td->ts.clat_log,
1247                                                 td->o.lat_log_file, "clat");
1248                 } else
1249                         finish_log(td, td->ts.clat_log, "clat");
1250         }
1251         fio_mutex_up(writeout_mutex);
1252         if (td->o.exec_postrun)
1253                 exec_string(td->o.exec_postrun);
1254
1255         if (exitall_on_terminate)
1256                 terminate_threads(td->groupid);
1257
1258 err:
1259         if (td->error)
1260                 log_info("fio: pid=%d, err=%d/%s\n", (int) td->pid, td->error,
1261                                                         td->verror);
1262
1263         if (td->o.verify_async)
1264                 verify_async_exit(td);
1265
1266         close_and_free_files(td);
1267         close_ioengine(td);
1268         cleanup_io_u(td);
1269         cgroup_shutdown(td, &cgroup_mnt);
1270
1271         if (td->o.cpumask_set) {
1272                 int ret = fio_cpuset_exit(&td->o.cpumask);
1273
1274                 td_verror(td, ret, "fio_cpuset_exit");
1275         }
1276
1277         /*
1278          * do this very late, it will log file closing as well
1279          */
1280         if (td->o.write_iolog_file)
1281                 write_iolog_close(td);
1282
1283         options_mem_free(td);
1284         td_set_runstate(td, TD_EXITED);
1285         return (void *) (unsigned long) td->error;
1286 }
1287
1288 /*
1289  * We cannot pass the td data into a forked process, so attach the td and
1290  * pass it to the thread worker.
1291  */
1292 static int fork_main(int shmid, int offset)
1293 {
1294         struct thread_data *td;
1295         void *data, *ret;
1296
1297         data = shmat(shmid, NULL, 0);
1298         if (data == (void *) -1) {
1299                 int __err = errno;
1300
1301                 perror("shmat");
1302                 return __err;
1303         }
1304
1305         td = data + offset * sizeof(struct thread_data);
1306         ret = thread_main(td);
1307         shmdt(data);
1308         return (int) (unsigned long) ret;
1309 }
1310
1311 /*
1312  * Run over the job map and reap the threads that have exited, if any.
1313  */
1314 static void reap_threads(int *nr_running, int *t_rate, int *m_rate)
1315 {
1316         struct thread_data *td;
1317         int i, cputhreads, realthreads, pending, status, ret;
1318
1319         /*
1320          * reap exited threads (TD_EXITED -> TD_REAPED)
1321          */
1322         realthreads = pending = cputhreads = 0;
1323         for_each_td(td, i) {
1324                 int flags = 0;
1325
1326                 /*
1327                  * ->io_ops is NULL for a thread that has closed its
1328                  * io engine
1329                  */
1330                 if (td->io_ops && !strcmp(td->io_ops->name, "cpuio"))
1331                         cputhreads++;
1332                 else
1333                         realthreads++;
1334
1335                 if (!td->pid) {
1336                         pending++;
1337                         continue;
1338                 }
1339                 if (td->runstate == TD_REAPED)
1340                         continue;
1341                 if (td->o.use_thread) {
1342                         if (td->runstate == TD_EXITED) {
1343                                 td_set_runstate(td, TD_REAPED);
1344                                 goto reaped;
1345                         }
1346                         continue;
1347                 }
1348
1349                 flags = WNOHANG;
1350                 if (td->runstate == TD_EXITED)
1351                         flags = 0;
1352
1353                 /*
1354                  * check if someone quit or got killed in an unusual way
1355                  */
1356                 ret = waitpid(td->pid, &status, flags);
1357                 if (ret < 0) {
1358                         if (errno == ECHILD) {
1359                                 log_err("fio: pid=%d disappeared %d\n",
1360                                                 (int) td->pid, td->runstate);
1361                                 td_set_runstate(td, TD_REAPED);
1362                                 goto reaped;
1363                         }
1364                         perror("waitpid");
1365                 } else if (ret == td->pid) {
1366                         if (WIFSIGNALED(status)) {
1367                                 int sig = WTERMSIG(status);
1368
1369                                 if (sig != SIGTERM)
1370                                         log_err("fio: pid=%d, got signal=%d\n",
1371                                                         (int) td->pid, sig);
1372                                 td_set_runstate(td, TD_REAPED);
1373                                 goto reaped;
1374                         }
1375                         if (WIFEXITED(status)) {
1376                                 if (WEXITSTATUS(status) && !td->error)
1377                                         td->error = WEXITSTATUS(status);
1378
1379                                 td_set_runstate(td, TD_REAPED);
1380                                 goto reaped;
1381                         }
1382                 }
1383
1384                 /*
1385                  * thread is not dead, continue
1386                  */
1387                 pending++;
1388                 continue;
1389 reaped:
1390                 (*nr_running)--;
1391                 (*m_rate) -= (td->o.ratemin[0] + td->o.ratemin[1]);
1392                 (*t_rate) -= (td->o.rate[0] + td->o.rate[1]);
1393                 if (!td->pid)
1394                         pending--;
1395
1396                 if (td->error)
1397                         exit_value++;
1398
1399                 done_secs += mtime_since_now(&td->epoch) / 1000;
1400         }
1401
1402         if (*nr_running == cputhreads && !pending && realthreads)
1403                 terminate_threads(TERMINATE_ALL);
1404 }
1405
1406 static void *gtod_thread_main(void *data)
1407 {
1408         fio_mutex_up(startup_mutex);
1409
1410         /*
1411          * As long as we have jobs around, update the clock. It would be nice
1412          * to have some way of NOT hammering that CPU with gettimeofday(),
1413          * but I'm not sure what to use outside of a simple CPU nop to relax
1414          * it - we don't want to lose precision.
1415          */
1416         while (threads) {
1417                 fio_gtod_update();
1418                 nop;
1419         }
1420
1421         return NULL;
1422 }
1423
1424 static int fio_start_gtod_thread(void)
1425 {
1426         pthread_attr_t attr;
1427         int ret;
1428
1429         pthread_attr_init(&attr);
1430         pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN);
1431         ret = pthread_create(&gtod_thread, &attr, gtod_thread_main, NULL);
1432         pthread_attr_destroy(&attr);
1433         if (ret) {
1434                 log_err("Can't create gtod thread: %s\n", strerror(ret));
1435                 return 1;
1436         }
1437
1438         ret = pthread_detach(gtod_thread);
1439         if (ret) {
1440                 log_err("Can't detatch gtod thread: %s\n", strerror(ret));
1441                 return 1;
1442         }
1443
1444         dprint(FD_MUTEX, "wait on startup_mutex\n");
1445         fio_mutex_down(startup_mutex);
1446         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1447         return 0;
1448 }
1449
1450 /*
1451  * Main function for kicking off and reaping jobs, as needed.
1452  */
1453 static void run_threads(void)
1454 {
1455         struct thread_data *td;
1456         unsigned long spent;
1457         int i, todo, nr_running, m_rate, t_rate, nr_started;
1458
1459         if (fio_pin_memory())
1460                 return;
1461
1462         if (fio_gtod_offload && fio_start_gtod_thread())
1463                 return;
1464
1465         if (!terse_output) {
1466                 log_info("Starting ");
1467                 if (nr_thread)
1468                         log_info("%d thread%s", nr_thread,
1469                                                 nr_thread > 1 ? "s" : "");
1470                 if (nr_process) {
1471                         if (nr_thread)
1472                                 printf(" and ");
1473                         log_info("%d process%s", nr_process,
1474                                                 nr_process > 1 ? "es" : "");
1475                 }
1476                 log_info("\n");
1477                 fflush(stdout);
1478         }
1479
1480         set_sig_handlers();
1481
1482         todo = thread_number;
1483         nr_running = 0;
1484         nr_started = 0;
1485         m_rate = t_rate = 0;
1486
1487         for_each_td(td, i) {
1488                 print_status_init(td->thread_number - 1);
1489
1490                 if (!td->o.create_serialize) {
1491                         init_disk_util(td);
1492                         continue;
1493                 }
1494
1495                 /*
1496                  * do file setup here so it happens sequentially,
1497                  * we don't want X number of threads getting their
1498                  * client data interspersed on disk
1499                  */
1500                 if (setup_files(td)) {
1501                         exit_value++;
1502                         if (td->error)
1503                                 log_err("fio: pid=%d, err=%d/%s\n",
1504                                         (int) td->pid, td->error, td->verror);
1505                         td_set_runstate(td, TD_REAPED);
1506                         todo--;
1507                 } else {
1508                         struct fio_file *f;
1509                         unsigned int j;
1510
1511                         /*
1512                          * for sharing to work, each job must always open
1513                          * its own files. so close them, if we opened them
1514                          * for creation
1515                          */
1516                         for_each_file(td, f, j) {
1517                                 if (fio_file_open(f))
1518                                         td_io_close_file(td, f);
1519                         }
1520                 }
1521
1522                 init_disk_util(td);
1523         }
1524
1525         set_genesis_time();
1526
1527         while (todo) {
1528                 struct thread_data *map[REAL_MAX_JOBS];
1529                 struct timeval this_start;
1530                 int this_jobs = 0, left;
1531
1532                 /*
1533                  * create threads (TD_NOT_CREATED -> TD_CREATED)
1534                  */
1535                 for_each_td(td, i) {
1536                         if (td->runstate != TD_NOT_CREATED)
1537                                 continue;
1538
1539                         /*
1540                          * never got a chance to start, killed by other
1541                          * thread for some reason
1542                          */
1543                         if (td->terminate) {
1544                                 todo--;
1545                                 continue;
1546                         }
1547
1548                         if (td->o.start_delay) {
1549                                 spent = mtime_since_genesis();
1550
1551                                 if (td->o.start_delay * 1000 > spent)
1552                                         continue;
1553                         }
1554
1555                         if (td->o.stonewall && (nr_started || nr_running)) {
1556                                 dprint(FD_PROCESS, "%s: stonewall wait\n",
1557                                                         td->o.name);
1558                                 break;
1559                         }
1560
1561                         /*
1562                          * Set state to created. Thread will transition
1563                          * to TD_INITIALIZED when it's done setting up.
1564                          */
1565                         td_set_runstate(td, TD_CREATED);
1566                         map[this_jobs++] = td;
1567                         nr_started++;
1568
1569                         if (td->o.use_thread) {
1570                                 int ret;
1571
1572                                 dprint(FD_PROCESS, "will pthread_create\n");
1573                                 ret = pthread_create(&td->thread, NULL,
1574                                                         thread_main, td);
1575                                 if (ret) {
1576                                         log_err("pthread_create: %s\n",
1577                                                         strerror(ret));
1578                                         nr_started--;
1579                                         break;
1580                                 }
1581                                 ret = pthread_detach(td->thread);
1582                                 if (ret)
1583                                         log_err("pthread_detach: %s",
1584                                                         strerror(ret));
1585                         } else {
1586                                 pid_t pid;
1587                                 dprint(FD_PROCESS, "will fork\n");
1588                                 pid = fork();
1589                                 if (!pid) {
1590                                         int ret = fork_main(shm_id, i);
1591
1592                                         _exit(ret);
1593                                 } else if (i == fio_debug_jobno)
1594                                         *fio_debug_jobp = pid;
1595                         }
1596                         dprint(FD_MUTEX, "wait on startup_mutex\n");
1597                         if (fio_mutex_down_timeout(startup_mutex, 10)) {
1598                                 log_err("fio: job startup hung? exiting.\n");
1599                                 terminate_threads(TERMINATE_ALL);
1600                                 fio_abort = 1;
1601                                 nr_started--;
1602                                 break;
1603                         }
1604                         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1605                 }
1606
1607                 /*
1608                  * Wait for the started threads to transition to
1609                  * TD_INITIALIZED.
1610                  */
1611                 fio_gettime(&this_start, NULL);
1612                 left = this_jobs;
1613                 while (left && !fio_abort) {
1614                         if (mtime_since_now(&this_start) > JOB_START_TIMEOUT)
1615                                 break;
1616
1617                         usleep(100000);
1618
1619                         for (i = 0; i < this_jobs; i++) {
1620                                 td = map[i];
1621                                 if (!td)
1622                                         continue;
1623                                 if (td->runstate == TD_INITIALIZED) {
1624                                         map[i] = NULL;
1625                                         left--;
1626                                 } else if (td->runstate >= TD_EXITED) {
1627                                         map[i] = NULL;
1628                                         left--;
1629                                         todo--;
1630                                         nr_running++; /* work-around... */
1631                                 }
1632                         }
1633                 }
1634
1635                 if (left) {
1636                         log_err("fio: %d jobs failed to start\n", left);
1637                         for (i = 0; i < this_jobs; i++) {
1638                                 td = map[i];
1639                                 if (!td)
1640                                         continue;
1641                                 kill(td->pid, SIGTERM);
1642                         }
1643                         break;
1644                 }
1645
1646                 /*
1647                  * start created threads (TD_INITIALIZED -> TD_RUNNING).
1648                  */
1649                 for_each_td(td, i) {
1650                         if (td->runstate != TD_INITIALIZED)
1651                                 continue;
1652
1653                         if (in_ramp_time(td))
1654                                 td_set_runstate(td, TD_RAMP);
1655                         else
1656                                 td_set_runstate(td, TD_RUNNING);
1657                         nr_running++;
1658                         nr_started--;
1659                         m_rate += td->o.ratemin[0] + td->o.ratemin[1];
1660                         t_rate += td->o.rate[0] + td->o.rate[1];
1661                         todo--;
1662                         fio_mutex_up(td->mutex);
1663                 }
1664
1665                 reap_threads(&nr_running, &t_rate, &m_rate);
1666
1667                 if (todo)
1668                         usleep(100000);
1669         }
1670
1671         while (nr_running) {
1672                 reap_threads(&nr_running, &t_rate, &m_rate);
1673                 usleep(10000);
1674         }
1675
1676         update_io_ticks();
1677         fio_unpin_memory();
1678 }
1679
1680 int main(int argc, char *argv[])
1681 {
1682         long ps;
1683
1684         sinit();
1685         init_rand(&__fio_rand_state);
1686
1687         /*
1688          * We need locale for number printing, if it isn't set then just
1689          * go with the US format.
1690          */
1691         if (!getenv("LC_NUMERIC"))
1692                 setlocale(LC_NUMERIC, "en_US");
1693
1694         ps = sysconf(_SC_PAGESIZE);
1695         if (ps < 0) {
1696                 log_err("Failed to get page size\n");
1697                 return 1;
1698         }
1699
1700         page_size = ps;
1701         page_mask = ps - 1;
1702
1703         fio_keywords_init();
1704
1705         if (parse_options(argc, argv))
1706                 return 1;
1707
1708         if (exec_profile && load_profile(exec_profile))
1709                 return 1;
1710
1711         if (!thread_number)
1712                 return 0;
1713
1714         if (write_bw_log) {
1715                 setup_log(&agg_io_log[DDIR_READ]);
1716                 setup_log(&agg_io_log[DDIR_WRITE]);
1717         }
1718
1719         startup_mutex = fio_mutex_init(0);
1720         if (startup_mutex == NULL)
1721                 return 1;
1722         writeout_mutex = fio_mutex_init(1);
1723         if (writeout_mutex == NULL)
1724                 return 1;
1725
1726         set_genesis_time();
1727         create_disk_util_thread();
1728
1729         cgroup_list = smalloc(sizeof(*cgroup_list));
1730         INIT_FLIST_HEAD(cgroup_list);
1731
1732         run_threads();
1733
1734         if (!fio_abort) {
1735                 show_run_stats();
1736                 if (write_bw_log) {
1737                         __finish_log(agg_io_log[DDIR_READ], "agg-read_bw.log");
1738                         __finish_log(agg_io_log[DDIR_WRITE],
1739                                         "agg-write_bw.log");
1740                 }
1741         }
1742
1743         cgroup_kill(cgroup_list);
1744         sfree(cgroup_list);
1745         sfree(cgroup_mnt);
1746
1747         fio_mutex_remove(startup_mutex);
1748         fio_mutex_remove(writeout_mutex);
1749         return exit_value;
1750 }