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 #include "server.h"
  50
  51 unsigned long page_mask;
  52 unsigned long page_size;
  53
  54 #define PAGE_ALIGN(buf) \
  55         (char *) (((unsigned long) (buf) + page_mask) & ~page_mask)
  56
  57 int groupid = 0;
  58 int thread_number = 0;
  59 int nr_process = 0;
  60 int nr_thread = 0;
  61 int shm_id = 0;
  62 int temp_stall_ts;
  63 unsigned long done_secs = 0;
  64
  65 static struct fio_mutex *startup_mutex;
  66 static struct fio_mutex *writeout_mutex;
  67 static volatile int fio_abort;
  68 static int exit_value;
  69 static pthread_t gtod_thread;
  70 static pthread_t disk_util_thread;
  71 static struct flist_head *cgroup_list;
  72 static char *cgroup_mnt;
  73
  74 unsigned long arch_flags = 0;
  75
  76 struct io_log *agg_io_log[2];
  77
  78 #define TERMINATE_ALL           (-1)
  79 #define JOB_START_TIMEOUT       (5 * 1000)
  80
  81 void td_set_runstate(struct thread_data *td, int runstate)
  82 {
  83         if (td->runstate == runstate)
  84                 return;
  85
  86         dprint(FD_PROCESS, "pid=%d: runstate %d -> %d\n", (int) td->pid,
  87                                                 td->runstate, runstate);
  88         td->runstate = runstate;
  89 }
  90
  91 static void terminate_threads(int group_id)
  92 {
  93         struct thread_data *td;
  94         int i;
  95
  96         dprint(FD_PROCESS, "terminate group_id=%d\n", group_id);
  97
  98         for_each_td(td, i) {
  99                 if (group_id == TERMINATE_ALL || groupid == td->groupid) {
 100                         dprint(FD_PROCESS, "setting terminate on %s/%d\n",
 101                                                 td->o.name, (int) td->pid);
 102                         td->terminate = 1;
 103                         td->o.start_delay = 0;
 104
 105                         /*
 106                          * if the thread is running, just let it exit
 107                          */
 108                         if (!td->pid)
 109                                 continue;
 110                         else if (td->runstate < TD_RAMP)
 111                                 kill(td->pid, SIGTERM);
 112                         else {
 113                                 struct ioengine_ops *ops = td->io_ops;
 114
 115                                 if (ops && (ops->flags & FIO_SIGTERM))
 116                                         kill(td->pid, SIGTERM);
 117                         }
 118                 }
 119         }
 120 }
 121
 122 static void sig_int(int sig)
 123 {
 124         if (threads) {
 125                 log_info("\nfio: terminating on signal %d\n", sig);
 126                 exit_backend = 1;
 127                 fflush(stdout);
 128                 exit_value = 128;
 129                 terminate_threads(TERMINATE_ALL);
 130         }
 131 }
 132
 133 static void *disk_thread_main(void *data)
 134 {
 135         fio_mutex_up(startup_mutex);
 136
 137         while (threads) {
 138                 usleep(DISK_UTIL_MSEC * 1000);
 139                 if (!threads)
 140                         break;
 141                 update_io_ticks();
 142                 print_thread_status();
 143         }
 144
 145         return NULL;
 146 }
 147
 148 static int create_disk_util_thread(void)
 149 {
 150         int ret;
 151
 152         ret = pthread_create(&disk_util_thread, NULL, disk_thread_main, NULL);
 153         if (ret) {
 154                 log_err("Can't create disk util thread: %s\n", strerror(ret));
 155                 return 1;
 156         }
 157
 158         ret = pthread_detach(disk_util_thread);
 159         if (ret) {
 160                 log_err("Can't detatch disk util thread: %s\n", strerror(ret));
 161                 return 1;
 162         }
 163
 164         dprint(FD_MUTEX, "wait on startup_mutex\n");
 165         fio_mutex_down(startup_mutex);
 166         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
 167         return 0;
 168 }
 169
 170 static void set_sig_handlers(void)
 171 {
 172         struct sigaction act;
 173
 174         memset(&act, 0, sizeof(act));
 175         act.sa_handler = sig_int;
 176         act.sa_flags = SA_RESTART;
 177         sigaction(SIGINT, &act, NULL);
 178
 179         memset(&act, 0, sizeof(act));
 180         act.sa_handler = sig_int;
 181         act.sa_flags = SA_RESTART;
 182         sigaction(SIGTERM, &act, NULL);
 183 }
 184
 185 /*
 186  * Check if we are above the minimum rate given.
 187  */
 188 static int __check_min_rate(struct thread_data *td, struct timeval *now,
 189                             enum fio_ddir ddir)
 190 {
 191         unsigned long long bytes = 0;
 192         unsigned long iops = 0;
 193         unsigned long spent;
 194         unsigned long rate;
 195         unsigned int ratemin = 0;
 196         unsigned int rate_iops = 0;
 197         unsigned int rate_iops_min = 0;
 198
 199         assert(ddir_rw(ddir));
 200
 201         if (!td->o.ratemin[ddir] && !td->o.rate_iops_min[ddir])
 202                 return 0;
 203
 204         /*
 205          * allow a 2 second settle period in the beginning
 206          */
 207         if (mtime_since(&td->start, now) < 2000)
 208                 return 0;
 209
 210         iops += td->io_blocks[ddir];
 211         bytes += td->this_io_bytes[ddir];
 212         ratemin += td->o.ratemin[ddir];
 213         rate_iops += td->o.rate_iops[ddir];
 214         rate_iops_min += td->o.rate_iops_min[ddir];
 215
 216         /*
 217          * if rate blocks is set, sample is running
 218          */
 219         if (td->rate_bytes[ddir] || td->rate_blocks[ddir]) {
 220                 spent = mtime_since(&td->lastrate[ddir], now);
 221                 if (spent < td->o.ratecycle)
 222                         return 0;
 223
 224                 if (td->o.rate[ddir]) {
 225                         /*
 226                          * check bandwidth specified rate
 227                          */
 228                         if (bytes < td->rate_bytes[ddir]) {
 229                                 log_err("%s: min rate %u not met\n", td->o.name,
 230                                                                 ratemin);
 231                                 return 1;
 232                         } else {
 233                                 rate = ((bytes - td->rate_bytes[ddir]) * 1000) / spent;
 234                                 if (rate < ratemin ||
 235                                     bytes < td->rate_bytes[ddir]) {
 236                                         log_err("%s: min rate %u not met, got"
 237                                                 " %luKB/sec\n", td->o.name,
 238                                                         ratemin, rate);
 239                                         return 1;
 240                                 }
 241                         }
 242                 } else {
 243                         /*
 244                          * checks iops specified rate
 245                          */
 246                         if (iops < rate_iops) {
 247                                 log_err("%s: min iops rate %u not met\n",
 248                                                 td->o.name, rate_iops);
 249                                 return 1;
 250                         } else {
 251                                 rate = ((iops - td->rate_blocks[ddir]) * 1000) / spent;
 252                                 if (rate < rate_iops_min ||
 253                                     iops < td->rate_blocks[ddir]) {
 254                                         log_err("%s: min iops rate %u not met,"
 255                                                 " got %lu\n", td->o.name,
 256                                                         rate_iops_min, rate);
 257                                 }
 258                         }
 259                 }
 260         }
 261
 262         td->rate_bytes[ddir] = bytes;
 263         td->rate_blocks[ddir] = iops;
 264         memcpy(&td->lastrate[ddir], now, sizeof(*now));
 265         return 0;
 266 }
 267
 268 static int check_min_rate(struct thread_data *td, struct timeval *now,
 269                           unsigned long *bytes_done)
 270 {
 271         int ret = 0;
 272
 273         if (bytes_done[0])
 274                 ret |= __check_min_rate(td, now, 0);
 275         if (bytes_done[1])
 276                 ret |= __check_min_rate(td, now, 1);
 277
 278         return ret;
 279 }
 280
 281 static inline int runtime_exceeded(struct thread_data *td, struct timeval *t)
 282 {
 283         if (!td->o.timeout)
 284                 return 0;
 285         if (mtime_since(&td->epoch, t) >= td->o.timeout * 1000)
 286                 return 1;
 287
 288         return 0;
 289 }
 290
 291 /*
 292  * When job exits, we can cancel the in-flight IO if we are using async
 293  * io. Attempt to do so.
 294  */
 295 static void cleanup_pending_aio(struct thread_data *td)
 296 {
 297         struct flist_head *entry, *n;
 298         struct io_u *io_u;
 299         int r;
 300
 301         /*
 302          * get immediately available events, if any
 303          */
 304         r = io_u_queued_complete(td, 0, NULL);
 305         if (r < 0)
 306                 return;
 307
 308         /*
 309          * now cancel remaining active events
 310          */
 311         if (td->io_ops->cancel) {
 312                 flist_for_each_safe(entry, n, &td->io_u_busylist) {
 313                         io_u = flist_entry(entry, struct io_u, list);
 314
 315                         /*
 316                          * if the io_u isn't in flight, then that generally
 317                          * means someone leaked an io_u. complain but fix
 318                          * it up, so we don't stall here.
 319                          */
 320                         if ((io_u->flags & IO_U_F_FLIGHT) == 0) {
 321                                 log_err("fio: non-busy IO on busy list\n");
 322                                 put_io_u(td, io_u);
 323                         } else {
 324                                 r = td->io_ops->cancel(td, io_u);
 325                                 if (!r)
 326                                         put_io_u(td, io_u);
 327                         }
 328                 }
 329         }
 330
 331         if (td->cur_depth)
 332                 r = io_u_queued_complete(td, td->cur_depth, NULL);
 333 }
 334
 335 /*
 336  * Helper to handle the final sync of a file. Works just like the normal
 337  * io path, just does everything sync.
 338  */
 339 static int fio_io_sync(struct thread_data *td, struct fio_file *f)
 340 {
 341         struct io_u *io_u = __get_io_u(td);
 342         int ret;
 343
 344         if (!io_u)
 345                 return 1;
 346
 347         io_u->ddir = DDIR_SYNC;
 348         io_u->file = f;
 349
 350         if (td_io_prep(td, io_u)) {
 351                 put_io_u(td, io_u);
 352                 return 1;
 353         }
 354
 355 requeue:
 356         ret = td_io_queue(td, io_u);
 357         if (ret < 0) {
 358                 td_verror(td, io_u->error, "td_io_queue");
 359                 put_io_u(td, io_u);
 360                 return 1;
 361         } else if (ret == FIO_Q_QUEUED) {
 362                 if (io_u_queued_complete(td, 1, NULL) < 0)
 363                         return 1;
 364         } else if (ret == FIO_Q_COMPLETED) {
 365                 if (io_u->error) {
 366                         td_verror(td, io_u->error, "td_io_queue");
 367                         return 1;
 368                 }
 369
 370                 if (io_u_sync_complete(td, io_u, NULL) < 0)
 371                         return 1;
 372         } else if (ret == FIO_Q_BUSY) {
 373                 if (td_io_commit(td))
 374                         return 1;
 375                 goto requeue;
 376         }
 377
 378         return 0;
 379 }
 380
 381 static inline void __update_tv_cache(struct thread_data *td)
 382 {
 383         fio_gettime(&td->tv_cache, NULL);
 384 }
 385
 386 static inline void update_tv_cache(struct thread_data *td)
 387 {
 388         if ((++td->tv_cache_nr & td->tv_cache_mask) == td->tv_cache_mask)
 389                 __update_tv_cache(td);
 390 }
 391
 392 static int break_on_this_error(struct thread_data *td, int *retptr)
 393 {
 394         int ret = *retptr;
 395
 396         if (ret < 0 || td->error) {
 397                 int err;
 398
 399                 if (!td->o.continue_on_error)
 400                         return 1;
 401
 402                 if (ret < 0)
 403                         err = -ret;
 404                 else
 405                         err = td->error;
 406
 407                 if (td_non_fatal_error(err)) {
 408                         /*
 409                          * Continue with the I/Os in case of
 410                          * a non fatal error.
 411                          */
 412                         update_error_count(td, err);
 413                         td_clear_error(td);
 414                         *retptr = 0;
 415                         return 0;
 416                 } else if (td->o.fill_device && err == ENOSPC) {
 417                         /*
 418                          * We expect to hit this error if
 419                          * fill_device option is set.
 420                          */
 421                         td_clear_error(td);
 422                         td->terminate = 1;
 423                         return 1;
 424                 } else {
 425                         /*
 426                          * Stop the I/O in case of a fatal
 427                          * error.
 428                          */
 429                         update_error_count(td, err);
 430                         return 1;
 431                 }
 432         }
 433
 434         return 0;
 435 }
 436
 437 /*
 438  * The main verify engine. Runs over the writes we previously submitted,
 439  * reads the blocks back in, and checks the crc/md5 of the data.
 440  */
 441 static void do_verify(struct thread_data *td)
 442 {
 443         struct fio_file *f;
 444         struct io_u *io_u;
 445         int ret, min_events;
 446         unsigned int i;
 447
 448         dprint(FD_VERIFY, "starting loop\n");
 449
 450         /*
 451          * sync io first and invalidate cache, to make sure we really
 452          * read from disk.
 453          */
 454         for_each_file(td, f, i) {
 455                 if (!fio_file_open(f))
 456                         continue;
 457                 if (fio_io_sync(td, f))
 458                         break;
 459                 if (file_invalidate_cache(td, f))
 460                         break;
 461         }
 462
 463         if (td->error)
 464                 return;
 465
 466         td_set_runstate(td, TD_VERIFYING);
 467
 468         io_u = NULL;
 469         while (!td->terminate) {
 470                 int ret2, full;
 471
 472                 update_tv_cache(td);
 473
 474                 if (runtime_exceeded(td, &td->tv_cache)) {
 475                         __update_tv_cache(td);
 476                         if (runtime_exceeded(td, &td->tv_cache)) {
 477                                 td->terminate = 1;
 478                                 break;
 479                         }
 480                 }
 481
 482                 io_u = __get_io_u(td);
 483                 if (!io_u)
 484                         break;
 485
 486                 if (get_next_verify(td, io_u)) {
 487                         put_io_u(td, io_u);
 488                         break;
 489                 }
 490
 491                 if (td_io_prep(td, io_u)) {
 492                         put_io_u(td, io_u);
 493                         break;
 494                 }
 495
 496                 if (td->o.verify_async)
 497                         io_u->end_io = verify_io_u_async;
 498                 else
 499                         io_u->end_io = verify_io_u;
 500
 501                 ret = td_io_queue(td, io_u);
 502                 switch (ret) {
 503                 case FIO_Q_COMPLETED:
 504                         if (io_u->error) {
 505                                 ret = -io_u->error;
 506                                 clear_io_u(td, io_u);
 507                         } else if (io_u->resid) {
 508                                 int bytes = io_u->xfer_buflen - io_u->resid;
 509
 510                                 /*
 511                                  * zero read, fail
 512                                  */
 513                                 if (!bytes) {
 514                                         td_verror(td, EIO, "full resid");
 515                                         put_io_u(td, io_u);
 516                                         break;
 517                                 }
 518
 519                                 io_u->xfer_buflen = io_u->resid;
 520                                 io_u->xfer_buf += bytes;
 521                                 io_u->offset += bytes;
 522
 523                                 if (ddir_rw(io_u->ddir))
 524                                         td->ts.short_io_u[io_u->ddir]++;
 525
 526                                 f = io_u->file;
 527                                 if (io_u->offset == f->real_file_size)
 528                                         goto sync_done;
 529
 530                                 requeue_io_u(td, &io_u);
 531                         } else {
 532 sync_done:
 533                                 ret = io_u_sync_complete(td, io_u, NULL);
 534                                 if (ret < 0)
 535                                         break;
 536                         }
 537                         continue;
 538                 case FIO_Q_QUEUED:
 539                         break;
 540                 case FIO_Q_BUSY:
 541                         requeue_io_u(td, &io_u);
 542                         ret2 = td_io_commit(td);
 543                         if (ret2 < 0)
 544                                 ret = ret2;
 545                         break;
 546                 default:
 547                         assert(ret < 0);
 548                         td_verror(td, -ret, "td_io_queue");
 549                         break;
 550                 }
 551
 552                 if (break_on_this_error(td, &ret))
 553                         break;
 554
 555                 /*
 556                  * if we can queue more, do so. but check if there are
 557                  * completed io_u's first. Note that we can get BUSY even
 558                  * without IO queued, if the system is resource starved.
 559                  */
 560                 full = queue_full(td) || (ret == FIO_Q_BUSY && td->cur_depth);
 561                 if (full || !td->o.iodepth_batch_complete) {
 562                         min_events = min(td->o.iodepth_batch_complete,
 563                                          td->cur_depth);
 564                         if (full && !min_events && td->o.iodepth_batch_complete != 0)
 565                                 min_events = 1;
 566
 567                         do {
 568                                 /*
 569                                  * Reap required number of io units, if any,
 570                                  * and do the verification on them through
 571                                  * the callback handler
 572                                  */
 573                                 if (io_u_queued_complete(td, min_events, NULL) < 0) {
 574                                         ret = -1;
 575                                         break;
 576                                 }
 577                         } while (full && (td->cur_depth > td->o.iodepth_low));
 578                 }
 579                 if (ret < 0)
 580                         break;
 581         }
 582
 583         if (!td->error) {
 584                 min_events = td->cur_depth;
 585
 586                 if (min_events)
 587                         ret = io_u_queued_complete(td, min_events, NULL);
 588         } else
 589                 cleanup_pending_aio(td);
 590
 591         td_set_runstate(td, TD_RUNNING);
 592
 593         dprint(FD_VERIFY, "exiting loop\n");
 594 }
 595
 596 /*
 597  * Main IO worker function. It retrieves io_u's to process and queues
 598  * and reaps them, checking for rate and errors along the way.
 599  */
 600 static void do_io(struct thread_data *td)
 601 {
 602         unsigned int i;
 603         int ret = 0;
 604
 605         if (in_ramp_time(td))
 606                 td_set_runstate(td, TD_RAMP);
 607         else
 608                 td_set_runstate(td, TD_RUNNING);
 609
 610         while ( (td->o.read_iolog_file && !flist_empty(&td->io_log_list)) ||
 611                 (!flist_empty(&td->trim_list)) ||
 612                 ((td->this_io_bytes[0] + td->this_io_bytes[1]) < td->o.size) ) {
 613                 struct timeval comp_time;
 614                 unsigned long bytes_done[2] = { 0, 0 };
 615                 int min_evts = 0;
 616                 struct io_u *io_u;
 617                 int ret2, full;
 618
 619                 if (td->terminate)
 620                         break;
 621
 622                 update_tv_cache(td);
 623
 624                 if (runtime_exceeded(td, &td->tv_cache)) {
 625                         __update_tv_cache(td);
 626                         if (runtime_exceeded(td, &td->tv_cache)) {
 627                                 td->terminate = 1;
 628                                 break;
 629                         }
 630                 }
 631
 632                 io_u = get_io_u(td);
 633                 if (!io_u)
 634                         break;
 635
 636                 /*
 637                  * Add verification end_io handler, if asked to verify
 638                  * a previously written file.
 639                  */
 640                 if (td->o.verify != VERIFY_NONE && io_u->ddir == DDIR_READ &&
 641                     !td_rw(td)) {
 642                         if (td->o.verify_async)
 643                                 io_u->end_io = verify_io_u_async;
 644                         else
 645                                 io_u->end_io = verify_io_u;
 646                         td_set_runstate(td, TD_VERIFYING);
 647                 } else if (in_ramp_time(td))
 648                         td_set_runstate(td, TD_RAMP);
 649                 else
 650                         td_set_runstate(td, TD_RUNNING);
 651
 652                 ret = td_io_queue(td, io_u);
 653                 switch (ret) {
 654                 case FIO_Q_COMPLETED:
 655                         if (io_u->error) {
 656                                 ret = -io_u->error;
 657                                 clear_io_u(td, io_u);
 658                         } else if (io_u->resid) {
 659                                 int bytes = io_u->xfer_buflen - io_u->resid;
 660                                 struct fio_file *f = io_u->file;
 661
 662                                 /*
 663                                  * zero read, fail
 664                                  */
 665                                 if (!bytes) {
 666                                         td_verror(td, EIO, "full resid");
 667                                         put_io_u(td, io_u);
 668                                         break;
 669                                 }
 670
 671                                 io_u->xfer_buflen = io_u->resid;
 672                                 io_u->xfer_buf += bytes;
 673                                 io_u->offset += bytes;
 674
 675                                 if (ddir_rw(io_u->ddir))
 676                                         td->ts.short_io_u[io_u->ddir]++;
 677
 678                                 if (io_u->offset == f->real_file_size)
 679                                         goto sync_done;
 680
 681                                 requeue_io_u(td, &io_u);
 682                         } else {
 683 sync_done:
 684                                 if (__should_check_rate(td, 0) ||
 685                                     __should_check_rate(td, 1))
 686                                         fio_gettime(&comp_time, NULL);
 687
 688                                 ret = io_u_sync_complete(td, io_u, bytes_done);
 689                                 if (ret < 0)
 690                                         break;
 691                         }
 692                         break;
 693                 case FIO_Q_QUEUED:
 694                         /*
 695                          * if the engine doesn't have a commit hook,
 696                          * the io_u is really queued. if it does have such
 697                          * a hook, it has to call io_u_queued() itself.
 698                          */
 699                         if (td->io_ops->commit == NULL)
 700                                 io_u_queued(td, io_u);
 701                         break;
 702                 case FIO_Q_BUSY:
 703                         requeue_io_u(td, &io_u);
 704                         ret2 = td_io_commit(td);
 705                         if (ret2 < 0)
 706                                 ret = ret2;
 707                         break;
 708                 default:
 709                         assert(ret < 0);
 710                         put_io_u(td, io_u);
 711                         break;
 712                 }
 713
 714                 if (break_on_this_error(td, &ret))
 715                         break;
 716
 717                 /*
 718                  * See if we need to complete some commands. Note that we
 719                  * can get BUSY even without IO queued, if the system is
 720                  * resource starved.
 721                  */
 722                 full = queue_full(td) || (ret == FIO_Q_BUSY && td->cur_depth);
 723                 if (full || !td->o.iodepth_batch_complete) {
 724                         min_evts = min(td->o.iodepth_batch_complete,
 725                                         td->cur_depth);
 726                         if (full && !min_evts && td->o.iodepth_batch_complete != 0)
 727                                 min_evts = 1;
 728
 729                         if (__should_check_rate(td, 0) ||
 730                             __should_check_rate(td, 1))
 731                                 fio_gettime(&comp_time, NULL);
 732
 733                         do {
 734                                 ret = io_u_queued_complete(td, min_evts, bytes_done);
 735                                 if (ret < 0)
 736                                         break;
 737
 738                         } while (full && (td->cur_depth > td->o.iodepth_low));
 739                 }
 740
 741                 if (ret < 0)
 742                         break;
 743                 if (!(bytes_done[0] + bytes_done[1]))
 744                         continue;
 745
 746                 if (!in_ramp_time(td) && should_check_rate(td, bytes_done)) {
 747                         if (check_min_rate(td, &comp_time, bytes_done)) {
 748                                 if (exitall_on_terminate)
 749                                         terminate_threads(td->groupid);
 750                                 td_verror(td, EIO, "check_min_rate");
 751                                 break;
 752                         }
 753                 }
 754
 755                 if (td->o.thinktime) {
 756                         unsigned long long b;
 757
 758                         b = td->io_blocks[0] + td->io_blocks[1];
 759                         if (!(b % td->o.thinktime_blocks)) {
 760                                 int left;
 761
 762                                 if (td->o.thinktime_spin)
 763                                         usec_spin(td->o.thinktime_spin);
 764
 765                                 left = td->o.thinktime - td->o.thinktime_spin;
 766                                 if (left)
 767                                         usec_sleep(td, left);
 768                         }
 769                 }
 770         }
 771
 772         if (td->trim_entries)
 773                 printf("trim entries %ld\n", td->trim_entries);
 774
 775         if (td->o.fill_device && td->error == ENOSPC) {
 776                 td->error = 0;
 777                 td->terminate = 1;
 778         }
 779         if (!td->error) {
 780                 struct fio_file *f;
 781
 782                 i = td->cur_depth;
 783                 if (i) {
 784                         ret = io_u_queued_complete(td, i, NULL);
 785                         if (td->o.fill_device && td->error == ENOSPC)
 786                                 td->error = 0;
 787                 }
 788
 789                 if (should_fsync(td) && td->o.end_fsync) {
 790                         td_set_runstate(td, TD_FSYNCING);
 791
 792                         for_each_file(td, f, i) {
 793                                 if (!fio_file_open(f))
 794                                         continue;
 795                                 fio_io_sync(td, f);
 796                         }
 797                 }
 798         } else
 799                 cleanup_pending_aio(td);
 800
 801         /*
 802          * stop job if we failed doing any IO
 803          */
 804         if ((td->this_io_bytes[0] + td->this_io_bytes[1]) == 0)
 805                 td->done = 1;
 806 }
 807
 808 static void cleanup_io_u(struct thread_data *td)
 809 {
 810         struct flist_head *entry, *n;
 811         struct io_u *io_u;
 812
 813         flist_for_each_safe(entry, n, &td->io_u_freelist) {
 814                 io_u = flist_entry(entry, struct io_u, list);
 815
 816                 flist_del(&io_u->list);
 817                 fio_memfree(io_u, sizeof(*io_u));
 818         }
 819
 820         free_io_mem(td);
 821 }
 822
 823 static int init_io_u(struct thread_data *td)
 824 {
 825         struct io_u *io_u;
 826         unsigned int max_bs;
 827         int cl_align, i, max_units;
 828         char *p;
 829
 830         max_units = td->o.iodepth;
 831         max_bs = max(td->o.max_bs[DDIR_READ], td->o.max_bs[DDIR_WRITE]);
 832         td->orig_buffer_size = (unsigned long long) max_bs
 833                                         * (unsigned long long) max_units;
 834
 835         if (td->o.mem_type == MEM_SHMHUGE || td->o.mem_type == MEM_MMAPHUGE) {
 836                 unsigned long bs;
 837
 838                 bs = td->orig_buffer_size + td->o.hugepage_size - 1;
 839                 td->orig_buffer_size = bs & ~(td->o.hugepage_size - 1);
 840         }
 841
 842         if (td->orig_buffer_size != (size_t) td->orig_buffer_size) {
 843                 log_err("fio: IO memory too large. Reduce max_bs or iodepth\n");
 844                 return 1;
 845         }
 846
 847         if (allocate_io_mem(td))
 848                 return 1;
 849
 850         if (td->o.odirect || td->o.mem_align ||
 851             (td->io_ops->flags & FIO_RAWIO))
 852                 p = PAGE_ALIGN(td->orig_buffer) + td->o.mem_align;
 853         else
 854                 p = td->orig_buffer;
 855
 856         cl_align = os_cache_line_size();
 857
 858         for (i = 0; i < max_units; i++) {
 859                 void *ptr;
 860
 861                 if (td->terminate)
 862                         return 1;
 863
 864                 ptr = fio_memalign(cl_align, sizeof(*io_u));
 865                 if (!ptr) {
 866                         log_err("fio: unable to allocate aligned memory\n");
 867                         break;
 868                 }
 869
 870                 io_u = ptr;
 871                 memset(io_u, 0, sizeof(*io_u));
 872                 INIT_FLIST_HEAD(&io_u->list);
 873                 dprint(FD_MEM, "io_u alloc %p, index %u\n", io_u, i);
 874
 875                 if (!(td->io_ops->flags & FIO_NOIO)) {
 876                         io_u->buf = p + max_bs * i;
 877                         dprint(FD_MEM, "io_u %p, mem %p\n", io_u, io_u->buf);
 878
 879                         if (td_write(td))
 880                                 io_u_fill_buffer(td, io_u, max_bs);
 881                         if (td_write(td) && td->o.verify_pattern_bytes) {
 882                                 /*
 883                                  * Fill the buffer with the pattern if we are
 884                                  * going to be doing writes.
 885                                  */
 886                                 fill_pattern(td, io_u->buf, max_bs, io_u, 0, 0);
 887                         }
 888                 }
 889
 890                 io_u->index = i;
 891                 io_u->flags = IO_U_F_FREE;
 892                 flist_add(&io_u->list, &td->io_u_freelist);
 893         }
 894
 895         return 0;
 896 }
 897
 898 static int switch_ioscheduler(struct thread_data *td)
 899 {
 900         char tmp[256], tmp2[128];
 901         FILE *f;
 902         int ret;
 903
 904         if (td->io_ops->flags & FIO_DISKLESSIO)
 905                 return 0;
 906
 907         sprintf(tmp, "%s/queue/scheduler", td->sysfs_root);
 908
 909         f = fopen(tmp, "r+");
 910         if (!f) {
 911                 if (errno == ENOENT) {
 912                         log_err("fio: os or kernel doesn't support IO scheduler"
 913                                 " switching\n");
 914                         return 0;
 915                 }
 916                 td_verror(td, errno, "fopen iosched");
 917                 return 1;
 918         }
 919
 920         /*
 921          * Set io scheduler.
 922          */
 923         ret = fwrite(td->o.ioscheduler, strlen(td->o.ioscheduler), 1, f);
 924         if (ferror(f) || ret != 1) {
 925                 td_verror(td, errno, "fwrite");
 926                 fclose(f);
 927                 return 1;
 928         }
 929
 930         rewind(f);
 931
 932         /*
 933          * Read back and check that the selected scheduler is now the default.
 934          */
 935         ret = fread(tmp, 1, sizeof(tmp), f);
 936         if (ferror(f) || ret < 0) {
 937                 td_verror(td, errno, "fread");
 938                 fclose(f);
 939                 return 1;
 940         }
 941
 942         sprintf(tmp2, "[%s]", td->o.ioscheduler);
 943         if (!strstr(tmp, tmp2)) {
 944                 log_err("fio: io scheduler %s not found\n", td->o.ioscheduler);
 945                 td_verror(td, EINVAL, "iosched_switch");
 946                 fclose(f);
 947                 return 1;
 948         }
 949
 950         fclose(f);
 951         return 0;
 952 }
 953
 954 static int keep_running(struct thread_data *td)
 955 {
 956         unsigned long long io_done;
 957
 958         if (td->done)
 959                 return 0;
 960         if (td->o.time_based)
 961                 return 1;
 962         if (td->o.loops) {
 963                 td->o.loops--;
 964                 return 1;
 965         }
 966
 967         io_done = td->io_bytes[DDIR_READ] + td->io_bytes[DDIR_WRITE]
 968                         + td->io_skip_bytes;
 969         if (io_done < td->o.size)
 970                 return 1;
 971
 972         return 0;
 973 }
 974
 975 static void reset_io_counters(struct thread_data *td)
 976 {
 977         td->stat_io_bytes[0] = td->stat_io_bytes[1] = 0;
 978         td->this_io_bytes[0] = td->this_io_bytes[1] = 0;
 979         td->zone_bytes = 0;
 980         td->rate_bytes[0] = td->rate_bytes[1] = 0;
 981         td->rate_blocks[0] = td->rate_blocks[1] = 0;
 982
 983         td->last_was_sync = 0;
 984
 985         /*
 986          * reset file done count if we are to start over
 987          */
 988         if (td->o.time_based || td->o.loops)
 989                 td->nr_done_files = 0;
 990 }
 991
 992 void reset_all_stats(struct thread_data *td)
 993 {
 994         struct timeval tv;
 995         int i;
 996
 997         reset_io_counters(td);
 998
 999         for (i = 0; i < 2; i++) {
1000                 td->io_bytes[i] = 0;
1001                 td->io_blocks[i] = 0;
1002                 td->io_issues[i] = 0;
1003                 td->ts.total_io_u[i] = 0;
1004         }
1005
1006         fio_gettime(&tv, NULL);
1007         td->ts.runtime[0] = 0;
1008         td->ts.runtime[1] = 0;
1009         memcpy(&td->epoch, &tv, sizeof(tv));
1010         memcpy(&td->start, &tv, sizeof(tv));
1011 }
1012
1013 static void clear_io_state(struct thread_data *td)
1014 {
1015         struct fio_file *f;
1016         unsigned int i;
1017
1018         reset_io_counters(td);
1019
1020         close_files(td);
1021         for_each_file(td, f, i)
1022                 fio_file_clear_done(f);
1023
1024         /*
1025          * Set the same seed to get repeatable runs
1026          */
1027         td_fill_rand_seeds(td);
1028 }
1029
1030 static int exec_string(const char *string)
1031 {
1032         int ret, newlen = strlen(string) + 1 + 8;
1033         char *str;
1034
1035         str = malloc(newlen);
1036         sprintf(str, "sh -c %s", string);
1037
1038         ret = system(str);
1039         if (ret == -1)
1040                 log_err("fio: exec of cmd <%s> failed\n", str);
1041
1042         free(str);
1043         return ret;
1044 }
1045
1046 /*
1047  * Entry point for the thread based jobs. The process based jobs end up
1048  * here as well, after a little setup.
1049  */
1050 static void *thread_main(void *data)
1051 {
1052         unsigned long long elapsed;
1053         struct thread_data *td = data;
1054         pthread_condattr_t attr;
1055         int clear_state;
1056
1057         if (!td->o.use_thread) {
1058                 setsid();
1059                 td->pid = getpid();
1060         } else
1061                 td->pid = gettid();
1062
1063         dprint(FD_PROCESS, "jobs pid=%d started\n", (int) td->pid);
1064
1065         INIT_FLIST_HEAD(&td->io_u_freelist);
1066         INIT_FLIST_HEAD(&td->io_u_busylist);
1067         INIT_FLIST_HEAD(&td->io_u_requeues);
1068         INIT_FLIST_HEAD(&td->io_log_list);
1069         INIT_FLIST_HEAD(&td->io_hist_list);
1070         INIT_FLIST_HEAD(&td->verify_list);
1071         INIT_FLIST_HEAD(&td->trim_list);
1072         pthread_mutex_init(&td->io_u_lock, NULL);
1073         td->io_hist_tree = RB_ROOT;
1074
1075         pthread_condattr_init(&attr);
1076         pthread_cond_init(&td->verify_cond, &attr);
1077         pthread_cond_init(&td->free_cond, &attr);
1078
1079         td_set_runstate(td, TD_INITIALIZED);
1080         dprint(FD_MUTEX, "up startup_mutex\n");
1081         fio_mutex_up(startup_mutex);
1082         dprint(FD_MUTEX, "wait on td->mutex\n");
1083         fio_mutex_down(td->mutex);
1084         dprint(FD_MUTEX, "done waiting on td->mutex\n");
1085
1086         /*
1087          * the ->mutex mutex is now no longer used, close it to avoid
1088          * eating a file descriptor
1089          */
1090         fio_mutex_remove(td->mutex);
1091
1092         /*
1093          * A new gid requires privilege, so we need to do this before setting
1094          * the uid.
1095          */
1096         if (td->o.gid != -1U && setgid(td->o.gid)) {
1097                 td_verror(td, errno, "setgid");
1098                 goto err;
1099         }
1100         if (td->o.uid != -1U && setuid(td->o.uid)) {
1101                 td_verror(td, errno, "setuid");
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
1112         /*
1113          * Set affinity first, in case it has an impact on the memory
1114          * allocations.
1115          */
1116         if (td->o.cpumask_set && fio_setaffinity(td->pid, td->o.cpumask) == -1) {
1117                 td_verror(td, errno, "cpu_set_affinity");
1118                 goto err;
1119         }
1120
1121         /*
1122          * May alter parameters that init_io_u() will use, so we need to
1123          * do this first.
1124          */
1125         if (init_iolog(td))
1126                 goto err;
1127
1128         if (init_io_u(td))
1129                 goto err;
1130
1131         if (td->o.verify_async && verify_async_init(td))
1132                 goto err;
1133
1134         if (td->ioprio_set) {
1135                 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, td->ioprio) == -1) {
1136                         td_verror(td, errno, "ioprio_set");
1137                         goto err;
1138                 }
1139         }
1140
1141         if (td->o.cgroup_weight && cgroup_setup(td, cgroup_list, &cgroup_mnt))
1142                 goto err;
1143
1144         if (nice(td->o.nice) == -1) {
1145                 td_verror(td, errno, "nice");
1146                 goto err;
1147         }
1148
1149         if (td->o.ioscheduler && switch_ioscheduler(td))
1150                 goto err;
1151
1152         if (!td->o.create_serialize && setup_files(td))
1153                 goto err;
1154
1155         if (td_io_init(td))
1156                 goto err;
1157
1158         if (init_random_map(td))
1159                 goto err;
1160
1161         if (td->o.exec_prerun) {
1162                 if (exec_string(td->o.exec_prerun))
1163                         goto err;
1164         }
1165
1166         if (td->o.pre_read) {
1167                 if (pre_read_files(td) < 0)
1168                         goto err;
1169         }
1170
1171         fio_gettime(&td->epoch, NULL);
1172         getrusage(RUSAGE_SELF, &td->ru_start);
1173
1174         clear_state = 0;
1175         while (keep_running(td)) {
1176                 fio_gettime(&td->start, NULL);
1177                 memcpy(&td->stat_sample_time[0], &td->start, sizeof(td->start));
1178                 memcpy(&td->stat_sample_time[1], &td->start, sizeof(td->start));
1179                 memcpy(&td->tv_cache, &td->start, sizeof(td->start));
1180
1181                 if (td->o.ratemin[0] || td->o.ratemin[1])
1182                         memcpy(&td->lastrate, &td->stat_sample_time,
1183                                                         sizeof(td->lastrate));
1184
1185                 if (clear_state)
1186                         clear_io_state(td);
1187
1188                 prune_io_piece_log(td);
1189
1190                 do_io(td);
1191
1192                 clear_state = 1;
1193
1194                 if (td_read(td) && td->io_bytes[DDIR_READ]) {
1195                         elapsed = utime_since_now(&td->start);
1196                         td->ts.runtime[DDIR_READ] += elapsed;
1197                 }
1198                 if (td_write(td) && td->io_bytes[DDIR_WRITE]) {
1199                         elapsed = utime_since_now(&td->start);
1200                         td->ts.runtime[DDIR_WRITE] += elapsed;
1201                 }
1202
1203                 if (td->error || td->terminate)
1204                         break;
1205
1206                 if (!td->o.do_verify ||
1207                     td->o.verify == VERIFY_NONE ||
1208                     (td->io_ops->flags & FIO_UNIDIR))
1209                         continue;
1210
1211                 clear_io_state(td);
1212
1213                 fio_gettime(&td->start, NULL);
1214
1215                 do_verify(td);
1216
1217                 td->ts.runtime[DDIR_READ] += utime_since_now(&td->start);
1218
1219                 if (td->error || td->terminate)
1220                         break;
1221         }
1222
1223         update_rusage_stat(td);
1224         td->ts.runtime[0] = (td->ts.runtime[0] + 999) / 1000;
1225         td->ts.runtime[1] = (td->ts.runtime[1] + 999) / 1000;
1226         td->ts.total_run_time = mtime_since_now(&td->epoch);
1227         td->ts.io_bytes[0] = td->io_bytes[0];
1228         td->ts.io_bytes[1] = td->io_bytes[1];
1229
1230         fio_mutex_down(writeout_mutex);
1231         if (td->bw_log) {
1232                 if (td->o.bw_log_file) {
1233                         finish_log_named(td, td->bw_log,
1234                                                 td->o.bw_log_file, "bw");
1235                 } else
1236                         finish_log(td, td->bw_log, "bw");
1237         }
1238         if (td->lat_log) {
1239                 if (td->o.lat_log_file) {
1240                         finish_log_named(td, td->lat_log,
1241                                                 td->o.lat_log_file, "lat");
1242                 } else
1243                         finish_log(td, td->lat_log, "lat");
1244         }
1245         if (td->slat_log) {
1246                 if (td->o.lat_log_file) {
1247                         finish_log_named(td, td->slat_log,
1248                                                 td->o.lat_log_file, "slat");
1249                 } else
1250                         finish_log(td, td->slat_log, "slat");
1251         }
1252         if (td->clat_log) {
1253                 if (td->o.lat_log_file) {
1254                         finish_log_named(td, td->clat_log,
1255                                                 td->o.lat_log_file, "clat");
1256                 } else
1257                         finish_log(td, td->clat_log, "clat");
1258         }
1259         fio_mutex_up(writeout_mutex);
1260         if (td->o.exec_postrun)
1261                 exec_string(td->o.exec_postrun);
1262
1263         if (exitall_on_terminate)
1264                 terminate_threads(td->groupid);
1265
1266 err:
1267         if (td->error)
1268                 log_info("fio: pid=%d, err=%d/%s\n", (int) td->pid, td->error,
1269                                                         td->verror);
1270
1271         if (td->o.verify_async)
1272                 verify_async_exit(td);
1273
1274         close_and_free_files(td);
1275         close_ioengine(td);
1276         cleanup_io_u(td);
1277         cgroup_shutdown(td, &cgroup_mnt);
1278
1279         if (td->o.cpumask_set) {
1280                 int ret = fio_cpuset_exit(&td->o.cpumask);
1281
1282                 td_verror(td, ret, "fio_cpuset_exit");
1283         }
1284
1285         /*
1286          * do this very late, it will log file closing as well
1287          */
1288         if (td->o.write_iolog_file)
1289                 write_iolog_close(td);
1290
1291         options_mem_free(td);
1292         td_set_runstate(td, TD_EXITED);
1293         return (void *) (unsigned long) td->error;
1294 }
1295
1296 /*
1297  * We cannot pass the td data into a forked process, so attach the td and
1298  * pass it to the thread worker.
1299  */
1300 static int fork_main(int shmid, int offset)
1301 {
1302         struct thread_data *td;
1303         void *data, *ret;
1304
1305 #ifndef __hpux
1306         data = shmat(shmid, NULL, 0);
1307         if (data == (void *) -1) {
1308                 int __err = errno;
1309
1310                 perror("shmat");
1311                 return __err;
1312         }
1313 #else
1314         /*
1315          * HP-UX inherits shm mappings?
1316          */
1317         data = threads;
1318 #endif
1319
1320         td = data + offset * sizeof(struct thread_data);
1321         ret = thread_main(td);
1322         shmdt(data);
1323         return (int) (unsigned long) ret;
1324 }
1325
1326 /*
1327  * Run over the job map and reap the threads that have exited, if any.
1328  */
1329 static void reap_threads(int *nr_running, int *t_rate, int *m_rate)
1330 {
1331         struct thread_data *td;
1332         int i, cputhreads, realthreads, pending, status, ret;
1333
1334         /*
1335          * reap exited threads (TD_EXITED -> TD_REAPED)
1336          */
1337         realthreads = pending = cputhreads = 0;
1338         for_each_td(td, i) {
1339                 int flags = 0;
1340
1341                 /*
1342                  * ->io_ops is NULL for a thread that has closed its
1343                  * io engine
1344                  */
1345                 if (td->io_ops && !strcmp(td->io_ops->name, "cpuio"))
1346                         cputhreads++;
1347                 else
1348                         realthreads++;
1349
1350                 if (!td->pid) {
1351                         pending++;
1352                         continue;
1353                 }
1354                 if (td->runstate == TD_REAPED)
1355                         continue;
1356                 if (td->o.use_thread) {
1357                         if (td->runstate == TD_EXITED) {
1358                                 td_set_runstate(td, TD_REAPED);
1359                                 goto reaped;
1360                         }
1361                         continue;
1362                 }
1363
1364                 flags = WNOHANG;
1365                 if (td->runstate == TD_EXITED)
1366                         flags = 0;
1367
1368                 /*
1369                  * check if someone quit or got killed in an unusual way
1370                  */
1371                 ret = waitpid(td->pid, &status, flags);
1372                 if (ret < 0) {
1373                         if (errno == ECHILD) {
1374                                 log_err("fio: pid=%d disappeared %d\n",
1375                                                 (int) td->pid, td->runstate);
1376                                 td_set_runstate(td, TD_REAPED);
1377                                 goto reaped;
1378                         }
1379                         perror("waitpid");
1380                 } else if (ret == td->pid) {
1381                         if (WIFSIGNALED(status)) {
1382                                 int sig = WTERMSIG(status);
1383
1384                                 if (sig != SIGTERM)
1385                                         log_err("fio: pid=%d, got signal=%d\n",
1386                                                         (int) td->pid, sig);
1387                                 td_set_runstate(td, TD_REAPED);
1388                                 goto reaped;
1389                         }
1390                         if (WIFEXITED(status)) {
1391                                 if (WEXITSTATUS(status) && !td->error)
1392                                         td->error = WEXITSTATUS(status);
1393
1394                                 td_set_runstate(td, TD_REAPED);
1395                                 goto reaped;
1396                         }
1397                 }
1398
1399                 /*
1400                  * thread is not dead, continue
1401                  */
1402                 pending++;
1403                 continue;
1404 reaped:
1405                 (*nr_running)--;
1406                 (*m_rate) -= (td->o.ratemin[0] + td->o.ratemin[1]);
1407                 (*t_rate) -= (td->o.rate[0] + td->o.rate[1]);
1408                 if (!td->pid)
1409                         pending--;
1410
1411                 if (td->error)
1412                         exit_value++;
1413
1414                 done_secs += mtime_since_now(&td->epoch) / 1000;
1415         }
1416
1417         if (*nr_running == cputhreads && !pending && realthreads)
1418                 terminate_threads(TERMINATE_ALL);
1419 }
1420
1421 static void *gtod_thread_main(void *data)
1422 {
1423         fio_mutex_up(startup_mutex);
1424
1425         /*
1426          * As long as we have jobs around, update the clock. It would be nice
1427          * to have some way of NOT hammering that CPU with gettimeofday(),
1428          * but I'm not sure what to use outside of a simple CPU nop to relax
1429          * it - we don't want to lose precision.
1430          */
1431         while (threads) {
1432                 fio_gtod_update();
1433                 nop;
1434         }
1435
1436         return NULL;
1437 }
1438
1439 static int fio_start_gtod_thread(void)
1440 {
1441         pthread_attr_t attr;
1442         int ret;
1443
1444         pthread_attr_init(&attr);
1445         pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN);
1446         ret = pthread_create(&gtod_thread, &attr, gtod_thread_main, NULL);
1447         pthread_attr_destroy(&attr);
1448         if (ret) {
1449                 log_err("Can't create gtod thread: %s\n", strerror(ret));
1450                 return 1;
1451         }
1452
1453         ret = pthread_detach(gtod_thread);
1454         if (ret) {
1455                 log_err("Can't detatch gtod thread: %s\n", strerror(ret));
1456                 return 1;
1457         }
1458
1459         dprint(FD_MUTEX, "wait on startup_mutex\n");
1460         fio_mutex_down(startup_mutex);
1461         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1462         return 0;
1463 }
1464
1465 /*
1466  * Main function for kicking off and reaping jobs, as needed.
1467  */
1468 static void run_threads(void)
1469 {
1470         struct thread_data *td;
1471         unsigned long spent;
1472         int i, todo, nr_running, m_rate, t_rate, nr_started;
1473
1474         if (fio_pin_memory())
1475                 return;
1476
1477         if (fio_gtod_offload && fio_start_gtod_thread())
1478                 return;
1479
1480         if (!terse_output) {
1481                 log_info("Starting ");
1482                 if (nr_thread)
1483                         log_info("%d thread%s", nr_thread,
1484                                                 nr_thread > 1 ? "s" : "");
1485                 if (nr_process) {
1486                         if (nr_thread)
1487                                 printf(" and ");
1488                         log_info("%d process%s", nr_process,
1489                                                 nr_process > 1 ? "es" : "");
1490                 }
1491                 log_info("\n");
1492                 fflush(stdout);
1493         }
1494
1495         set_sig_handlers();
1496
1497         todo = thread_number;
1498         nr_running = 0;
1499         nr_started = 0;
1500         m_rate = t_rate = 0;
1501
1502         for_each_td(td, i) {
1503                 print_status_init(td->thread_number - 1);
1504
1505                 if (!td->o.create_serialize)
1506                         continue;
1507
1508                 /*
1509                  * do file setup here so it happens sequentially,
1510                  * we don't want X number of threads getting their
1511                  * client data interspersed on disk
1512                  */
1513                 if (setup_files(td)) {
1514                         exit_value++;
1515                         if (td->error)
1516                                 log_err("fio: pid=%d, err=%d/%s\n",
1517                                         (int) td->pid, td->error, td->verror);
1518                         td_set_runstate(td, TD_REAPED);
1519                         todo--;
1520                 } else {
1521                         struct fio_file *f;
1522                         unsigned int j;
1523
1524                         /*
1525                          * for sharing to work, each job must always open
1526                          * its own files. so close them, if we opened them
1527                          * for creation
1528                          */
1529                         for_each_file(td, f, j) {
1530                                 if (fio_file_open(f))
1531                                         td_io_close_file(td, f);
1532                         }
1533                 }
1534         }
1535
1536         set_genesis_time();
1537
1538         while (todo) {
1539                 struct thread_data *map[REAL_MAX_JOBS];
1540                 struct timeval this_start;
1541                 int this_jobs = 0, left;
1542
1543                 /*
1544                  * create threads (TD_NOT_CREATED -> TD_CREATED)
1545                  */
1546                 for_each_td(td, i) {
1547                         if (td->runstate != TD_NOT_CREATED)
1548                                 continue;
1549
1550                         /*
1551                          * never got a chance to start, killed by other
1552                          * thread for some reason
1553                          */
1554                         if (td->terminate) {
1555                                 todo--;
1556                                 continue;
1557                         }
1558
1559                         if (td->o.start_delay) {
1560                                 spent = mtime_since_genesis();
1561
1562                                 if (td->o.start_delay * 1000 > spent)
1563                                         continue;
1564                         }
1565
1566                         if (td->o.stonewall && (nr_started || nr_running)) {
1567                                 dprint(FD_PROCESS, "%s: stonewall wait\n",
1568                                                         td->o.name);
1569                                 break;
1570                         }
1571
1572                         init_disk_util(td);
1573
1574                         /*
1575                          * Set state to created. Thread will transition
1576                          * to TD_INITIALIZED when it's done setting up.
1577                          */
1578                         td_set_runstate(td, TD_CREATED);
1579                         map[this_jobs++] = td;
1580                         nr_started++;
1581
1582                         if (td->o.use_thread) {
1583                                 int ret;
1584
1585                                 dprint(FD_PROCESS, "will pthread_create\n");
1586                                 ret = pthread_create(&td->thread, NULL,
1587                                                         thread_main, td);
1588                                 if (ret) {
1589                                         log_err("pthread_create: %s\n",
1590                                                         strerror(ret));
1591                                         nr_started--;
1592                                         break;
1593                                 }
1594                                 ret = pthread_detach(td->thread);
1595                                 if (ret)
1596                                         log_err("pthread_detach: %s",
1597                                                         strerror(ret));
1598                         } else {
1599                                 pid_t pid;
1600                                 dprint(FD_PROCESS, "will fork\n");
1601                                 pid = fork();
1602                                 if (!pid) {
1603                                         int ret = fork_main(shm_id, i);
1604
1605                                         _exit(ret);
1606                                 } else if (i == fio_debug_jobno)
1607                                         *fio_debug_jobp = pid;
1608                         }
1609                         dprint(FD_MUTEX, "wait on startup_mutex\n");
1610                         if (fio_mutex_down_timeout(startup_mutex, 10)) {
1611                                 log_err("fio: job startup hung? exiting.\n");
1612                                 terminate_threads(TERMINATE_ALL);
1613                                 fio_abort = 1;
1614                                 nr_started--;
1615                                 break;
1616                         }
1617                         dprint(FD_MUTEX, "done waiting on startup_mutex\n");
1618                 }
1619
1620                 /*
1621                  * Wait for the started threads to transition to
1622                  * TD_INITIALIZED.
1623                  */
1624                 fio_gettime(&this_start, NULL);
1625                 left = this_jobs;
1626                 while (left && !fio_abort) {
1627                         if (mtime_since_now(&this_start) > JOB_START_TIMEOUT)
1628                                 break;
1629
1630                         usleep(100000);
1631
1632                         for (i = 0; i < this_jobs; i++) {
1633                                 td = map[i];
1634                                 if (!td)
1635                                         continue;
1636                                 if (td->runstate == TD_INITIALIZED) {
1637                                         map[i] = NULL;
1638                                         left--;
1639                                 } else if (td->runstate >= TD_EXITED) {
1640                                         map[i] = NULL;
1641                                         left--;
1642                                         todo--;
1643                                         nr_running++; /* work-around... */
1644                                 }
1645                         }
1646                 }
1647
1648                 if (left) {
1649                         log_err("fio: %d jobs failed to start\n", left);
1650                         for (i = 0; i < this_jobs; i++) {
1651                                 td = map[i];
1652                                 if (!td)
1653                                         continue;
1654                                 kill(td->pid, SIGTERM);
1655                         }
1656                         break;
1657                 }
1658
1659                 /*
1660                  * start created threads (TD_INITIALIZED -> TD_RUNNING).
1661                  */
1662                 for_each_td(td, i) {
1663                         if (td->runstate != TD_INITIALIZED)
1664                                 continue;
1665
1666                         if (in_ramp_time(td))
1667                                 td_set_runstate(td, TD_RAMP);
1668                         else
1669                                 td_set_runstate(td, TD_RUNNING);
1670                         nr_running++;
1671                         nr_started--;
1672                         m_rate += td->o.ratemin[0] + td->o.ratemin[1];
1673                         t_rate += td->o.rate[0] + td->o.rate[1];
1674                         todo--;
1675                         fio_mutex_up(td->mutex);
1676                 }
1677
1678                 reap_threads(&nr_running, &t_rate, &m_rate);
1679
1680                 if (todo)
1681                         usleep(100000);
1682         }
1683
1684         while (nr_running) {
1685                 reap_threads(&nr_running, &t_rate, &m_rate);
1686                 usleep(10000);
1687         }
1688
1689         update_io_ticks();
1690         fio_unpin_memory();
1691 }
1692
1693 int exec_run(void)
1694 {
1695         if (nr_clients)
1696                 return fio_handle_clients();
1697         if (exec_profile && load_profile(exec_profile))
1698                 return 1;
1699
1700         if (!thread_number)
1701                 return 0;
1702
1703         if (write_bw_log) {
1704                 setup_log(&agg_io_log[DDIR_READ]);
1705                 setup_log(&agg_io_log[DDIR_WRITE]);
1706         }
1707
1708         startup_mutex = fio_mutex_init(0);
1709         if (startup_mutex == NULL)
1710                 return 1;
1711         writeout_mutex = fio_mutex_init(1);
1712         if (writeout_mutex == NULL)
1713                 return 1;
1714
1715         set_genesis_time();
1716         create_disk_util_thread();
1717
1718         cgroup_list = smalloc(sizeof(*cgroup_list));
1719         INIT_FLIST_HEAD(cgroup_list);
1720
1721         run_threads();
1722
1723         if (!fio_abort) {
1724                 show_run_stats();
1725                 if (write_bw_log) {
1726                         __finish_log(agg_io_log[DDIR_READ], "agg-read_bw.log");
1727                         __finish_log(agg_io_log[DDIR_WRITE],
1728                                         "agg-write_bw.log");
1729                 }
1730         }
1731
1732         cgroup_kill(cgroup_list);
1733         sfree(cgroup_list);
1734         sfree(cgroup_mnt);
1735
1736         fio_mutex_remove(startup_mutex);
1737         fio_mutex_remove(writeout_mutex);
1738         return exit_value;
1739 }
1740
1741 void reset_fio_state(void)
1742 {
1743         groupid = 0;
1744         thread_number = 0;
1745         nr_process = 0;
1746         nr_thread = 0;
1747         done_secs = 0;
1748 }
1749
1750 int main(int argc, char *argv[], char *envp[])
1751 {
1752         long ps;
1753
1754         arch_init(envp);
1755
1756         sinit();
1757
1758         /*
1759          * We need locale for number printing, if it isn't set then just
1760          * go with the US format.
1761          */
1762         if (!getenv("LC_NUMERIC"))
1763                 setlocale(LC_NUMERIC, "en_US");
1764
1765         ps = sysconf(_SC_PAGESIZE);
1766         if (ps < 0) {
1767                 log_err("Failed to get page size\n");
1768                 return 1;
1769         }
1770
1771         page_size = ps;
1772         page_mask = ps - 1;
1773
1774         fio_keywords_init();
1775
1776         if (parse_options(argc, argv))
1777                 return 1;
1778
1779         return exec_run();
1780 }