iolog.c

   1 /*
   2  * Code related to writing an iolog of what a thread is doing, and to
   3  * later read that back and replay
   4  */
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <libgen.h>
   8 #include <assert.h>
   9 #include <sys/types.h>
  10 #include <sys/stat.h>
  11 #include <unistd.h>
  12 #ifdef CONFIG_ZLIB
  13 #include <zlib.h>
  14 #endif
  15
  16 #include "flist.h"
  17 #include "fio.h"
  18 #include "verify.h"
  19 #include "trim.h"
  20 #include "filelock.h"
  21 #include "smalloc.h"
  22
  23 static int iolog_flush(struct io_log *log);
  24
  25 static const char iolog_ver2[] = "fio version 2 iolog";
  26
  27 void queue_io_piece(struct thread_data *td, struct io_piece *ipo)
  28 {
  29         flist_add_tail(&ipo->list, &td->io_log_list);
  30         td->total_io_size += ipo->len;
  31 }
  32
  33 void log_io_u(const struct thread_data *td, const struct io_u *io_u)
  34 {
  35         if (!td->o.write_iolog_file)
  36                 return;
  37
  38         fprintf(td->iolog_f, "%s %s %llu %lu\n", io_u->file->file_name,
  39                                                 io_ddir_name(io_u->ddir),
  40                                                 io_u->offset, io_u->buflen);
  41 }
  42
  43 void log_file(struct thread_data *td, struct fio_file *f,
  44               enum file_log_act what)
  45 {
  46         const char *act[] = { "add", "open", "close" };
  47
  48         assert(what < 3);
  49
  50         if (!td->o.write_iolog_file)
  51                 return;
  52
  53
  54         /*
  55          * this happens on the pre-open/close done before the job starts
  56          */
  57         if (!td->iolog_f)
  58                 return;
  59
  60         fprintf(td->iolog_f, "%s %s\n", f->file_name, act[what]);
  61 }
  62
  63 static void iolog_delay(struct thread_data *td, unsigned long delay)
  64 {
  65         uint64_t usec = utime_since_now(&td->last_issue);
  66         uint64_t this_delay;
  67         struct timeval tv;
  68
  69         if (delay < td->time_offset) {
  70                 td->time_offset = 0;
  71                 return;
  72         }
  73
  74         delay -= td->time_offset;
  75         if (delay < usec)
  76                 return;
  77
  78         delay -= usec;
  79
  80         fio_gettime(&tv, NULL);
  81         while (delay && !td->terminate) {
  82                 this_delay = delay;
  83                 if (this_delay > 500000)
  84                         this_delay = 500000;
  85
  86                 usec_sleep(td, this_delay);
  87                 delay -= this_delay;
  88         }
  89
  90         usec = utime_since_now(&tv);
  91         if (usec > delay)
  92                 td->time_offset = usec - delay;
  93         else
  94                 td->time_offset = 0;
  95 }
  96
  97 static int ipo_special(struct thread_data *td, struct io_piece *ipo)
  98 {
  99         struct fio_file *f;
 100         int ret;
 101
 102         /*
 103          * Not a special ipo
 104          */
 105         if (ipo->ddir != DDIR_INVAL)
 106                 return 0;
 107
 108         f = td->files[ipo->fileno];
 109
 110         switch (ipo->file_action) {
 111         case FIO_LOG_OPEN_FILE:
 112                 ret = td_io_open_file(td, f);
 113                 if (!ret)
 114                         break;
 115                 td_verror(td, ret, "iolog open file");
 116                 return -1;
 117         case FIO_LOG_CLOSE_FILE:
 118                 td_io_close_file(td, f);
 119                 break;
 120         case FIO_LOG_UNLINK_FILE:
 121                 td_io_unlink_file(td, f);
 122                 break;
 123         default:
 124                 log_err("fio: bad file action %d\n", ipo->file_action);
 125                 break;
 126         }
 127
 128         return 1;
 129 }
 130
 131 int read_iolog_get(struct thread_data *td, struct io_u *io_u)
 132 {
 133         struct io_piece *ipo;
 134         unsigned long elapsed;
 135
 136         while (!flist_empty(&td->io_log_list)) {
 137                 int ret;
 138
 139                 ipo = flist_first_entry(&td->io_log_list, struct io_piece, list);
 140                 flist_del(&ipo->list);
 141                 remove_trim_entry(td, ipo);
 142
 143                 ret = ipo_special(td, ipo);
 144                 if (ret < 0) {
 145                         free(ipo);
 146                         break;
 147                 } else if (ret > 0) {
 148                         free(ipo);
 149                         continue;
 150                 }
 151
 152                 io_u->ddir = ipo->ddir;
 153                 if (ipo->ddir != DDIR_WAIT) {
 154                         io_u->offset = ipo->offset;
 155                         io_u->buflen = ipo->len;
 156                         io_u->file = td->files[ipo->fileno];
 157                         get_file(io_u->file);
 158                         dprint(FD_IO, "iolog: get %llu/%lu/%s\n", io_u->offset,
 159                                                 io_u->buflen, io_u->file->file_name);
 160                         if (ipo->delay)
 161                                 iolog_delay(td, ipo->delay);
 162                 } else {
 163                         elapsed = mtime_since_genesis();
 164                         if (ipo->delay > elapsed)
 165                                 usec_sleep(td, (ipo->delay - elapsed) * 1000);
 166                 }
 167
 168                 free(ipo);
 169
 170                 if (io_u->ddir != DDIR_WAIT)
 171                         return 0;
 172         }
 173
 174         td->done = 1;
 175         return 1;
 176 }
 177
 178 void prune_io_piece_log(struct thread_data *td)
 179 {
 180         struct io_piece *ipo;
 181         struct rb_node *n;
 182
 183         while ((n = rb_first(&td->io_hist_tree)) != NULL) {
 184                 ipo = rb_entry(n, struct io_piece, rb_node);
 185                 rb_erase(n, &td->io_hist_tree);
 186                 remove_trim_entry(td, ipo);
 187                 td->io_hist_len--;
 188                 free(ipo);
 189         }
 190
 191         while (!flist_empty(&td->io_hist_list)) {
 192                 ipo = flist_first_entry(&td->io_hist_list, struct io_piece, list);
 193                 flist_del(&ipo->list);
 194                 remove_trim_entry(td, ipo);
 195                 td->io_hist_len--;
 196                 free(ipo);
 197         }
 198 }
 199
 200 /*
 201  * log a successful write, so we can unwind the log for verify
 202  */
 203 void log_io_piece(struct thread_data *td, struct io_u *io_u)
 204 {
 205         struct rb_node **p, *parent;
 206         struct io_piece *ipo, *__ipo;
 207
 208         ipo = malloc(sizeof(struct io_piece));
 209         init_ipo(ipo);
 210         ipo->file = io_u->file;
 211         ipo->offset = io_u->offset;
 212         ipo->len = io_u->buflen;
 213         ipo->numberio = io_u->numberio;
 214         ipo->flags = IP_F_IN_FLIGHT;
 215
 216         io_u->ipo = ipo;
 217
 218         if (io_u_should_trim(td, io_u)) {
 219                 flist_add_tail(&ipo->trim_list, &td->trim_list);
 220                 td->trim_entries++;
 221         }
 222
 223         /*
 224          * We don't need to sort the entries, if:
 225          *
 226          *      Sequential writes, or
 227          *      Random writes that lay out the file as it goes along
 228          *
 229          * For both these cases, just reading back data in the order we
 230          * wrote it out is the fastest.
 231          *
 232          * One exception is if we don't have a random map AND we are doing
 233          * verifies, in that case we need to check for duplicate blocks and
 234          * drop the old one, which we rely on the rb insert/lookup for
 235          * handling.
 236          */
 237         if (((!td->o.verifysort) || !td_random(td) || !td->o.overwrite) &&
 238               (file_randommap(td, ipo->file) || td->o.verify == VERIFY_NONE)) {
 239                 INIT_FLIST_HEAD(&ipo->list);
 240                 flist_add_tail(&ipo->list, &td->io_hist_list);
 241                 ipo->flags |= IP_F_ONLIST;
 242                 td->io_hist_len++;
 243                 return;
 244         }
 245
 246         RB_CLEAR_NODE(&ipo->rb_node);
 247
 248         /*
 249          * Sort the entry into the verification list
 250          */
 251 restart:
 252         p = &td->io_hist_tree.rb_node;
 253         parent = NULL;
 254         while (*p) {
 255                 int overlap = 0;
 256                 parent = *p;
 257
 258                 __ipo = rb_entry(parent, struct io_piece, rb_node);
 259                 if (ipo->file < __ipo->file)
 260                         p = &(*p)->rb_left;
 261                 else if (ipo->file > __ipo->file)
 262                         p = &(*p)->rb_right;
 263                 else if (ipo->offset < __ipo->offset) {
 264                         p = &(*p)->rb_left;
 265                         overlap = ipo->offset + ipo->len > __ipo->offset;
 266                 }
 267                 else if (ipo->offset > __ipo->offset) {
 268                         p = &(*p)->rb_right;
 269                         overlap = __ipo->offset + __ipo->len > ipo->offset;
 270                 }
 271                 else
 272                         overlap = 1;
 273
 274                 if (overlap) {
 275                         dprint(FD_IO, "iolog: overlap %llu/%lu, %llu/%lu",
 276                                 __ipo->offset, __ipo->len,
 277                                 ipo->offset, ipo->len);
 278                         td->io_hist_len--;
 279                         rb_erase(parent, &td->io_hist_tree);
 280                         remove_trim_entry(td, __ipo);
 281                         free(__ipo);
 282                         goto restart;
 283                 }
 284         }
 285
 286         rb_link_node(&ipo->rb_node, parent, p);
 287         rb_insert_color(&ipo->rb_node, &td->io_hist_tree);
 288         ipo->flags |= IP_F_ONRB;
 289         td->io_hist_len++;
 290 }
 291
 292 void unlog_io_piece(struct thread_data *td, struct io_u *io_u)
 293 {
 294         struct io_piece *ipo = io_u->ipo;
 295
 296         if (td->ts.nr_block_infos) {
 297                 uint32_t *info = io_u_block_info(td, io_u);
 298                 if (BLOCK_INFO_STATE(*info) < BLOCK_STATE_TRIM_FAILURE) {
 299                         if (io_u->ddir == DDIR_TRIM)
 300                                 *info = BLOCK_INFO_SET_STATE(*info,
 301                                                 BLOCK_STATE_TRIM_FAILURE);
 302                         else if (io_u->ddir == DDIR_WRITE)
 303                                 *info = BLOCK_INFO_SET_STATE(*info,
 304                                                 BLOCK_STATE_WRITE_FAILURE);
 305                 }
 306         }
 307
 308         if (!ipo)
 309                 return;
 310
 311         if (ipo->flags & IP_F_ONRB)
 312                 rb_erase(&ipo->rb_node, &td->io_hist_tree);
 313         else if (ipo->flags & IP_F_ONLIST)
 314                 flist_del(&ipo->list);
 315
 316         free(ipo);
 317         io_u->ipo = NULL;
 318         td->io_hist_len--;
 319 }
 320
 321 void trim_io_piece(struct thread_data *td, const struct io_u *io_u)
 322 {
 323         struct io_piece *ipo = io_u->ipo;
 324
 325         if (!ipo)
 326                 return;
 327
 328         ipo->len = io_u->xfer_buflen - io_u->resid;
 329 }
 330
 331 void write_iolog_close(struct thread_data *td)
 332 {
 333         fflush(td->iolog_f);
 334         fclose(td->iolog_f);
 335         free(td->iolog_buf);
 336         td->iolog_f = NULL;
 337         td->iolog_buf = NULL;
 338 }
 339
 340 /*
 341  * Read version 2 iolog data. It is enhanced to include per-file logging,
 342  * syncs, etc.
 343  */
 344 static int read_iolog2(struct thread_data *td, FILE *f)
 345 {
 346         unsigned long long offset;
 347         unsigned int bytes;
 348         int reads, writes, waits, fileno = 0, file_action = 0; /* stupid gcc */
 349         char *rfname, *fname, *act;
 350         char *str, *p;
 351         enum fio_ddir rw;
 352
 353         free_release_files(td);
 354
 355         /*
 356          * Read in the read iolog and store it, reuse the infrastructure
 357          * for doing verifications.
 358          */
 359         str = malloc(4096);
 360         rfname = fname = malloc(256+16);
 361         act = malloc(256+16);
 362
 363         reads = writes = waits = 0;
 364         while ((p = fgets(str, 4096, f)) != NULL) {
 365                 struct io_piece *ipo;
 366                 int r;
 367
 368                 r = sscanf(p, "%256s %256s %llu %u", rfname, act, &offset,
 369                                                                         &bytes);
 370
 371                 if (td->o.replay_redirect)
 372                         fname = td->o.replay_redirect;
 373
 374                 if (r == 4) {
 375                         /*
 376                          * Check action first
 377                          */
 378                         if (!strcmp(act, "wait"))
 379                                 rw = DDIR_WAIT;
 380                         else if (!strcmp(act, "read"))
 381                                 rw = DDIR_READ;
 382                         else if (!strcmp(act, "write"))
 383                                 rw = DDIR_WRITE;
 384                         else if (!strcmp(act, "sync"))
 385                                 rw = DDIR_SYNC;
 386                         else if (!strcmp(act, "datasync"))
 387                                 rw = DDIR_DATASYNC;
 388                         else if (!strcmp(act, "trim"))
 389                                 rw = DDIR_TRIM;
 390                         else {
 391                                 log_err("fio: bad iolog file action: %s\n",
 392                                                                         act);
 393                                 continue;
 394                         }
 395                         fileno = get_fileno(td, fname);
 396                 } else if (r == 2) {
 397                         rw = DDIR_INVAL;
 398                         if (!strcmp(act, "add")) {
 399                                 fileno = add_file(td, fname, 0, 1);
 400                                 file_action = FIO_LOG_ADD_FILE;
 401                                 continue;
 402                         } else if (!strcmp(act, "open")) {
 403                                 fileno = get_fileno(td, fname);
 404                                 file_action = FIO_LOG_OPEN_FILE;
 405                         } else if (!strcmp(act, "close")) {
 406                                 fileno = get_fileno(td, fname);
 407                                 file_action = FIO_LOG_CLOSE_FILE;
 408                         } else {
 409                                 log_err("fio: bad iolog file action: %s\n",
 410                                                                         act);
 411                                 continue;
 412                         }
 413                 } else {
 414                         log_err("bad iolog2: %s", p);
 415                         continue;
 416                 }
 417
 418                 if (rw == DDIR_READ)
 419                         reads++;
 420                 else if (rw == DDIR_WRITE) {
 421                         /*
 422                          * Don't add a write for ro mode
 423                          */
 424                         if (read_only)
 425                                 continue;
 426                         writes++;
 427                 } else if (rw == DDIR_WAIT) {
 428                         waits++;
 429                 } else if (rw == DDIR_INVAL) {
 430                 } else if (!ddir_sync(rw)) {
 431                         log_err("bad ddir: %d\n", rw);
 432                         continue;
 433                 }
 434
 435                 /*
 436                  * Make note of file
 437                  */
 438                 ipo = malloc(sizeof(*ipo));
 439                 init_ipo(ipo);
 440                 ipo->ddir = rw;
 441                 if (rw == DDIR_WAIT) {
 442                         ipo->delay = offset;
 443                 } else {
 444                         ipo->offset = offset;
 445                         ipo->len = bytes;
 446                         if (rw != DDIR_INVAL && bytes > td->o.max_bs[rw])
 447                                 td->o.max_bs[rw] = bytes;
 448                         ipo->fileno = fileno;
 449                         ipo->file_action = file_action;
 450                         td->o.size += bytes;
 451                 }
 452
 453                 queue_io_piece(td, ipo);
 454         }
 455
 456         free(str);
 457         free(act);
 458         free(rfname);
 459
 460         if (writes && read_only) {
 461                 log_err("fio: <%s> skips replay of %d writes due to"
 462                         " read-only\n", td->o.name, writes);
 463                 writes = 0;
 464         }
 465
 466         if (!reads && !writes && !waits)
 467                 return 1;
 468         else if (reads && !writes)
 469                 td->o.td_ddir = TD_DDIR_READ;
 470         else if (!reads && writes)
 471                 td->o.td_ddir = TD_DDIR_WRITE;
 472         else
 473                 td->o.td_ddir = TD_DDIR_RW;
 474
 475         return 0;
 476 }
 477
 478 /*
 479  * open iolog, check version, and call appropriate parser
 480  */
 481 static int init_iolog_read(struct thread_data *td)
 482 {
 483         char buffer[256], *p;
 484         FILE *f;
 485         int ret;
 486
 487         f = fopen(td->o.read_iolog_file, "r");
 488         if (!f) {
 489                 perror("fopen read iolog");
 490                 return 1;
 491         }
 492
 493         p = fgets(buffer, sizeof(buffer), f);
 494         if (!p) {
 495                 td_verror(td, errno, "iolog read");
 496                 log_err("fio: unable to read iolog\n");
 497                 fclose(f);
 498                 return 1;
 499         }
 500
 501         /*
 502          * version 2 of the iolog stores a specific string as the
 503          * first line, check for that
 504          */
 505         if (!strncmp(iolog_ver2, buffer, strlen(iolog_ver2)))
 506                 ret = read_iolog2(td, f);
 507         else {
 508                 log_err("fio: iolog version 1 is no longer supported\n");
 509                 ret = 1;
 510         }
 511
 512         fclose(f);
 513         return ret;
 514 }
 515
 516 /*
 517  * Set up a log for storing io patterns.
 518  */
 519 static int init_iolog_write(struct thread_data *td)
 520 {
 521         struct fio_file *ff;
 522         FILE *f;
 523         unsigned int i;
 524
 525         f = fopen(td->o.write_iolog_file, "a");
 526         if (!f) {
 527                 perror("fopen write iolog");
 528                 return 1;
 529         }
 530
 531         /*
 532          * That's it for writing, setup a log buffer and we're done.
 533           */
 534         td->iolog_f = f;
 535         td->iolog_buf = malloc(8192);
 536         setvbuf(f, td->iolog_buf, _IOFBF, 8192);
 537
 538         /*
 539          * write our version line
 540          */
 541         if (fprintf(f, "%s\n", iolog_ver2) < 0) {
 542                 perror("iolog init\n");
 543                 return 1;
 544         }
 545
 546         /*
 547          * add all known files
 548          */
 549         for_each_file(td, ff, i)
 550                 log_file(td, ff, FIO_LOG_ADD_FILE);
 551
 552         return 0;
 553 }
 554
 555 int init_iolog(struct thread_data *td)
 556 {
 557         int ret = 0;
 558
 559         if (td->o.read_iolog_file) {
 560                 int need_swap;
 561
 562                 /*
 563                  * Check if it's a blktrace file and load that if possible.
 564                  * Otherwise assume it's a normal log file and load that.
 565                  */
 566                 if (is_blktrace(td->o.read_iolog_file, &need_swap))
 567                         ret = load_blktrace(td, td->o.read_iolog_file, need_swap);
 568                 else
 569                         ret = init_iolog_read(td);
 570         } else if (td->o.write_iolog_file)
 571                 ret = init_iolog_write(td);
 572
 573         if (ret)
 574                 td_verror(td, EINVAL, "failed initializing iolog");
 575
 576         return ret;
 577 }
 578
 579 void setup_log(struct io_log **log, struct log_params *p,
 580                const char *filename)
 581 {
 582         struct io_log *l;
 583         int i;
 584         struct io_u_plat_entry *entry;
 585         struct flist_head *list;
 586
 587         l = scalloc(1, sizeof(*l));
 588         INIT_FLIST_HEAD(&l->io_logs);
 589         l->log_type = p->log_type;
 590         l->log_offset = p->log_offset;
 591         l->log_gz = p->log_gz;
 592         l->log_gz_store = p->log_gz_store;
 593         l->avg_msec = p->avg_msec;
 594         l->hist_msec = p->hist_msec;
 595         l->hist_coarseness = p->hist_coarseness;
 596         l->filename = strdup(filename);
 597         l->td = p->td;
 598
 599         /* Initialize histogram lists for each r/w direction,
 600          * with initial io_u_plat of all zeros:
 601          */
 602         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 603                 list = &l->hist_window[i].list;
 604                 INIT_FLIST_HEAD(list);
 605                 entry = calloc(1, sizeof(struct io_u_plat_entry));
 606                 flist_add(&entry->list, list);
 607         }
 608
 609         if (l->td && l->td->o.io_submit_mode != IO_MODE_OFFLOAD) {
 610                 struct io_logs *p;
 611
 612                 p = calloc(1, sizeof(*l->pending));
 613                 p->max_samples = DEF_LOG_ENTRIES;
 614                 p->log = calloc(p->max_samples, log_entry_sz(l));
 615                 l->pending = p;
 616         }
 617
 618         if (l->log_offset)
 619                 l->log_ddir_mask = LOG_OFFSET_SAMPLE_BIT;
 620
 621         INIT_FLIST_HEAD(&l->chunk_list);
 622
 623         if (l->log_gz && !p->td)
 624                 l->log_gz = 0;
 625         else if (l->log_gz || l->log_gz_store) {
 626                 mutex_init_pshared(&l->chunk_lock);
 627                 p->td->flags |= TD_F_COMPRESS_LOG;
 628         }
 629
 630         *log = l;
 631 }
 632
 633 #ifdef CONFIG_SETVBUF
 634 static void *set_file_buffer(FILE *f)
 635 {
 636         size_t size = 1048576;
 637         void *buf;
 638
 639         buf = malloc(size);
 640         setvbuf(f, buf, _IOFBF, size);
 641         return buf;
 642 }
 643
 644 static void clear_file_buffer(void *buf)
 645 {
 646         free(buf);
 647 }
 648 #else
 649 static void *set_file_buffer(FILE *f)
 650 {
 651         return NULL;
 652 }
 653
 654 static void clear_file_buffer(void *buf)
 655 {
 656 }
 657 #endif
 658
 659 void free_log(struct io_log *log)
 660 {
 661         while (!flist_empty(&log->io_logs)) {
 662                 struct io_logs *cur_log;
 663
 664                 cur_log = flist_first_entry(&log->io_logs, struct io_logs, list);
 665                 flist_del_init(&cur_log->list);
 666                 free(cur_log->log);
 667                 sfree(cur_log);
 668         }
 669
 670         if (log->pending) {
 671                 free(log->pending->log);
 672                 free(log->pending);
 673                 log->pending = NULL;
 674         }
 675
 676         free(log->pending);
 677         free(log->filename);
 678         sfree(log);
 679 }
 680
 681 inline unsigned long hist_sum(int j, int stride, unsigned int *io_u_plat,
 682                 unsigned int *io_u_plat_last)
 683 {
 684         unsigned long sum;
 685         int k;
 686
 687         if (io_u_plat_last) {
 688                 for (k = sum = 0; k < stride; k++)
 689                         sum += io_u_plat[j + k] - io_u_plat_last[j + k];
 690         } else {
 691                 for (k = sum = 0; k < stride; k++)
 692                         sum += io_u_plat[j + k];
 693         }
 694
 695         return sum;
 696 }
 697
 698 static void flush_hist_samples(FILE *f, int hist_coarseness, void *samples,
 699                                uint64_t sample_size)
 700 {
 701         struct io_sample *s;
 702         int log_offset;
 703         uint64_t i, j, nr_samples;
 704         struct io_u_plat_entry *entry, *entry_before;
 705         unsigned int *io_u_plat;
 706         unsigned int *io_u_plat_before;
 707
 708         int stride = 1 << hist_coarseness;
 709
 710         if (!sample_size)
 711                 return;
 712
 713         s = __get_sample(samples, 0, 0);
 714         log_offset = (s->__ddir & LOG_OFFSET_SAMPLE_BIT) != 0;
 715
 716         nr_samples = sample_size / __log_entry_sz(log_offset);
 717
 718         for (i = 0; i < nr_samples; i++) {
 719                 s = __get_sample(samples, log_offset, i);
 720
 721                 entry = (struct io_u_plat_entry *) (uintptr_t) s->val;
 722                 io_u_plat = entry->io_u_plat;
 723
 724                 entry_before = flist_first_entry(&entry->list, struct io_u_plat_entry, list);
 725                 io_u_plat_before = entry_before->io_u_plat;
 726
 727                 fprintf(f, "%lu, %u, %u, ", (unsigned long) s->time,
 728                                                 io_sample_ddir(s), s->bs);
 729                 for (j = 0; j < FIO_IO_U_PLAT_NR - stride; j += stride) {
 730                         fprintf(f, "%lu, ", hist_sum(j, stride, io_u_plat,
 731                                                 io_u_plat_before));
 732                 }
 733                 fprintf(f, "%lu\n", (unsigned long)
 734                         hist_sum(FIO_IO_U_PLAT_NR - stride, stride, io_u_plat,
 735                                         io_u_plat_before));
 736
 737                 flist_del(&entry_before->list);
 738                 free(entry_before);
 739         }
 740 }
 741
 742 void flush_samples(FILE *f, void *samples, uint64_t sample_size)
 743 {
 744         struct io_sample *s;
 745         int log_offset;
 746         uint64_t i, nr_samples;
 747
 748         if (!sample_size)
 749                 return;
 750
 751         s = __get_sample(samples, 0, 0);
 752         log_offset = (s->__ddir & LOG_OFFSET_SAMPLE_BIT) != 0;
 753
 754         nr_samples = sample_size / __log_entry_sz(log_offset);
 755
 756         for (i = 0; i < nr_samples; i++) {
 757                 s = __get_sample(samples, log_offset, i);
 758
 759                 if (!log_offset) {
 760                         fprintf(f, "%lu, %lu, %u, %u\n",
 761                                         (unsigned long) s->time,
 762                                         (unsigned long) s->val,
 763                                         io_sample_ddir(s), s->bs);
 764                 } else {
 765                         struct io_sample_offset *so = (void *) s;
 766
 767                         fprintf(f, "%lu, %lu, %u, %u, %llu\n",
 768                                         (unsigned long) s->time,
 769                                         (unsigned long) s->val,
 770                                         io_sample_ddir(s), s->bs,
 771                                         (unsigned long long) so->offset);
 772                 }
 773         }
 774 }
 775
 776 #ifdef CONFIG_ZLIB
 777
 778 struct iolog_flush_data {
 779         struct workqueue_work work;
 780         struct io_log *log;
 781         void *samples;
 782         uint32_t nr_samples;
 783         bool free;
 784 };
 785
 786 #define GZ_CHUNK        131072
 787
 788 static struct iolog_compress *get_new_chunk(unsigned int seq)
 789 {
 790         struct iolog_compress *c;
 791
 792         c = malloc(sizeof(*c));
 793         INIT_FLIST_HEAD(&c->list);
 794         c->buf = malloc(GZ_CHUNK);
 795         c->len = 0;
 796         c->seq = seq;
 797         return c;
 798 }
 799
 800 static void free_chunk(struct iolog_compress *ic)
 801 {
 802         free(ic->buf);
 803         free(ic);
 804 }
 805
 806 static int z_stream_init(z_stream *stream, int gz_hdr)
 807 {
 808         int wbits = 15;
 809
 810         memset(stream, 0, sizeof(*stream));
 811         stream->zalloc = Z_NULL;
 812         stream->zfree = Z_NULL;
 813         stream->opaque = Z_NULL;
 814         stream->next_in = Z_NULL;
 815
 816         /*
 817          * zlib magic - add 32 for auto-detection of gz header or not,
 818          * if we decide to store files in a gzip friendly format.
 819          */
 820         if (gz_hdr)
 821                 wbits += 32;
 822
 823         if (inflateInit2(stream, wbits) != Z_OK)
 824                 return 1;
 825
 826         return 0;
 827 }
 828
 829 struct inflate_chunk_iter {
 830         unsigned int seq;
 831         int err;
 832         void *buf;
 833         size_t buf_size;
 834         size_t buf_used;
 835         size_t chunk_sz;
 836 };
 837
 838 static void finish_chunk(z_stream *stream, FILE *f,
 839                          struct inflate_chunk_iter *iter)
 840 {
 841         int ret;
 842
 843         ret = inflateEnd(stream);
 844         if (ret != Z_OK)
 845                 log_err("fio: failed to end log inflation seq %d (%d)\n",
 846                                 iter->seq, ret);
 847
 848         flush_samples(f, iter->buf, iter->buf_used);
 849         free(iter->buf);
 850         iter->buf = NULL;
 851         iter->buf_size = iter->buf_used = 0;
 852 }
 853
 854 /*
 855  * Iterative chunk inflation. Handles cases where we cross into a new
 856  * sequence, doing flush finish of previous chunk if needed.
 857  */
 858 static size_t inflate_chunk(struct iolog_compress *ic, int gz_hdr, FILE *f,
 859                             z_stream *stream, struct inflate_chunk_iter *iter)
 860 {
 861         size_t ret;
 862
 863         dprint(FD_COMPRESS, "inflate chunk size=%lu, seq=%u\n",
 864                                 (unsigned long) ic->len, ic->seq);
 865
 866         if (ic->seq != iter->seq) {
 867                 if (iter->seq)
 868                         finish_chunk(stream, f, iter);
 869
 870                 z_stream_init(stream, gz_hdr);
 871                 iter->seq = ic->seq;
 872         }
 873
 874         stream->avail_in = ic->len;
 875         stream->next_in = ic->buf;
 876
 877         if (!iter->buf_size) {
 878                 iter->buf_size = iter->chunk_sz;
 879                 iter->buf = malloc(iter->buf_size);
 880         }
 881
 882         while (stream->avail_in) {
 883                 size_t this_out = iter->buf_size - iter->buf_used;
 884                 int err;
 885
 886                 stream->avail_out = this_out;
 887                 stream->next_out = iter->buf + iter->buf_used;
 888
 889                 err = inflate(stream, Z_NO_FLUSH);
 890                 if (err < 0) {
 891                         log_err("fio: failed inflating log: %d\n", err);
 892                         iter->err = err;
 893                         break;
 894                 }
 895
 896                 iter->buf_used += this_out - stream->avail_out;
 897
 898                 if (!stream->avail_out) {
 899                         iter->buf_size += iter->chunk_sz;
 900                         iter->buf = realloc(iter->buf, iter->buf_size);
 901                         continue;
 902                 }
 903
 904                 if (err == Z_STREAM_END)
 905                         break;
 906         }
 907
 908         ret = (void *) stream->next_in - ic->buf;
 909
 910         dprint(FD_COMPRESS, "inflated to size=%lu\n", (unsigned long) iter->buf_size);
 911
 912         return ret;
 913 }
 914
 915 /*
 916  * Inflate stored compressed chunks, or write them directly to the log
 917  * file if so instructed.
 918  */
 919 static int inflate_gz_chunks(struct io_log *log, FILE *f)
 920 {
 921         struct inflate_chunk_iter iter = { .chunk_sz = log->log_gz, };
 922         z_stream stream;
 923
 924         while (!flist_empty(&log->chunk_list)) {
 925                 struct iolog_compress *ic;
 926
 927                 ic = flist_first_entry(&log->chunk_list, struct iolog_compress, list);
 928                 flist_del(&ic->list);
 929
 930                 if (log->log_gz_store) {
 931                         size_t ret;
 932
 933                         dprint(FD_COMPRESS, "log write chunk size=%lu, "
 934                                 "seq=%u\n", (unsigned long) ic->len, ic->seq);
 935
 936                         ret = fwrite(ic->buf, ic->len, 1, f);
 937                         if (ret != 1 || ferror(f)) {
 938                                 iter.err = errno;
 939                                 log_err("fio: error writing compressed log\n");
 940                         }
 941                 } else
 942                         inflate_chunk(ic, log->log_gz_store, f, &stream, &iter);
 943
 944                 free_chunk(ic);
 945         }
 946
 947         if (iter.seq) {
 948                 finish_chunk(&stream, f, &iter);
 949                 free(iter.buf);
 950         }
 951
 952         return iter.err;
 953 }
 954
 955 /*
 956  * Open compressed log file and decompress the stored chunks and
 957  * write them to stdout. The chunks are stored sequentially in the
 958  * file, so we iterate over them and do them one-by-one.
 959  */
 960 int iolog_file_inflate(const char *file)
 961 {
 962         struct inflate_chunk_iter iter = { .chunk_sz = 64 * 1024 * 1024, };
 963         struct iolog_compress ic;
 964         z_stream stream;
 965         struct stat sb;
 966         ssize_t ret;
 967         size_t total;
 968         void *buf;
 969         FILE *f;
 970
 971         f = fopen(file, "r");
 972         if (!f) {
 973                 perror("fopen");
 974                 return 1;
 975         }
 976
 977         if (stat(file, &sb) < 0) {
 978                 fclose(f);
 979                 perror("stat");
 980                 return 1;
 981         }
 982
 983         ic.buf = buf = malloc(sb.st_size);
 984         ic.len = sb.st_size;
 985         ic.seq = 1;
 986
 987         ret = fread(ic.buf, ic.len, 1, f);
 988         if (ret < 0) {
 989                 perror("fread");
 990                 fclose(f);
 991                 free(buf);
 992                 return 1;
 993         } else if (ret != 1) {
 994                 log_err("fio: short read on reading log\n");
 995                 fclose(f);
 996                 free(buf);
 997                 return 1;
 998         }
 999
1000         fclose(f);
1001
1002         /*
1003          * Each chunk will return Z_STREAM_END. We don't know how many
1004          * chunks are in the file, so we just keep looping and incrementing
1005          * the sequence number until we have consumed the whole compressed
1006          * file.
1007          */
1008         total = ic.len;
1009         do {
1010                 size_t iret;
1011
1012                 iret = inflate_chunk(&ic,  1, stdout, &stream, &iter);
1013                 total -= iret;
1014                 if (!total)
1015                         break;
1016                 if (iter.err)
1017                         break;
1018
1019                 ic.seq++;
1020                 ic.len -= iret;
1021                 ic.buf += iret;
1022         } while (1);
1023
1024         if (iter.seq) {
1025                 finish_chunk(&stream, stdout, &iter);
1026                 free(iter.buf);
1027         }
1028
1029         free(buf);
1030         return iter.err;
1031 }
1032
1033 #else
1034
1035 static int inflate_gz_chunks(struct io_log *log, FILE *f)
1036 {
1037         return 0;
1038 }
1039
1040 int iolog_file_inflate(const char *file)
1041 {
1042         log_err("fio: log inflation not possible without zlib\n");
1043         return 1;
1044 }
1045
1046 #endif
1047
1048 void flush_log(struct io_log *log, bool do_append)
1049 {
1050         void *buf;
1051         FILE *f;
1052
1053         if (!do_append)
1054                 f = fopen(log->filename, "w");
1055         else
1056                 f = fopen(log->filename, "a");
1057         if (!f) {
1058                 perror("fopen log");
1059                 return;
1060         }
1061
1062         buf = set_file_buffer(f);
1063
1064         inflate_gz_chunks(log, f);
1065
1066         while (!flist_empty(&log->io_logs)) {
1067                 struct io_logs *cur_log;
1068
1069                 cur_log = flist_first_entry(&log->io_logs, struct io_logs, list);
1070                 flist_del_init(&cur_log->list);
1071
1072                 if (log->td && log == log->td->clat_hist_log)
1073                         flush_hist_samples(f, log->hist_coarseness, cur_log->log,
1074                                            log_sample_sz(log, cur_log));
1075                 else
1076                         flush_samples(f, cur_log->log, log_sample_sz(log, cur_log));
1077
1078                 sfree(cur_log);
1079         }
1080
1081         fclose(f);
1082         clear_file_buffer(buf);
1083 }
1084
1085 static int finish_log(struct thread_data *td, struct io_log *log, int trylock)
1086 {
1087         if (td->flags & TD_F_COMPRESS_LOG)
1088                 iolog_flush(log);
1089
1090         if (trylock) {
1091                 if (fio_trylock_file(log->filename))
1092                         return 1;
1093         } else
1094                 fio_lock_file(log->filename);
1095
1096         if (td->client_type == FIO_CLIENT_TYPE_GUI || is_backend)
1097                 fio_send_iolog(td, log, log->filename);
1098         else
1099                 flush_log(log, !td->o.per_job_logs);
1100
1101         fio_unlock_file(log->filename);
1102         free_log(log);
1103         return 0;
1104 }
1105
1106 size_t log_chunk_sizes(struct io_log *log)
1107 {
1108         struct flist_head *entry;
1109         size_t ret;
1110
1111         if (flist_empty(&log->chunk_list))
1112                 return 0;
1113
1114         ret = 0;
1115         pthread_mutex_lock(&log->chunk_lock);
1116         flist_for_each(entry, &log->chunk_list) {
1117                 struct iolog_compress *c;
1118
1119                 c = flist_entry(entry, struct iolog_compress, list);
1120                 ret += c->len;
1121         }
1122         pthread_mutex_unlock(&log->chunk_lock);
1123         return ret;
1124 }
1125
1126 #ifdef CONFIG_ZLIB
1127
1128 static int gz_work(struct iolog_flush_data *data)
1129 {
1130         struct iolog_compress *c = NULL;
1131         struct flist_head list;
1132         unsigned int seq;
1133         z_stream stream;
1134         size_t total = 0;
1135         int ret;
1136
1137         INIT_FLIST_HEAD(&list);
1138
1139         memset(&stream, 0, sizeof(stream));
1140         stream.zalloc = Z_NULL;
1141         stream.zfree = Z_NULL;
1142         stream.opaque = Z_NULL;
1143
1144         ret = deflateInit(&stream, Z_DEFAULT_COMPRESSION);
1145         if (ret != Z_OK) {
1146                 log_err("fio: failed to init gz stream\n");
1147                 goto err;
1148         }
1149
1150         seq = ++data->log->chunk_seq;
1151
1152         stream.next_in = (void *) data->samples;
1153         stream.avail_in = data->nr_samples * log_entry_sz(data->log);
1154
1155         dprint(FD_COMPRESS, "deflate input size=%lu, seq=%u, log=%s\n",
1156                                 (unsigned long) stream.avail_in, seq,
1157                                 data->log->filename);
1158         do {
1159                 if (c)
1160                         dprint(FD_COMPRESS, "seq=%d, chunk=%lu\n", seq,
1161                                 (unsigned long) c->len);
1162                 c = get_new_chunk(seq);
1163                 stream.avail_out = GZ_CHUNK;
1164                 stream.next_out = c->buf;
1165                 ret = deflate(&stream, Z_NO_FLUSH);
1166                 if (ret < 0) {
1167                         log_err("fio: deflate log (%d)\n", ret);
1168                         free_chunk(c);
1169                         goto err;
1170                 }
1171
1172                 c->len = GZ_CHUNK - stream.avail_out;
1173                 flist_add_tail(&c->list, &list);
1174                 total += c->len;
1175         } while (stream.avail_in);
1176
1177         stream.next_out = c->buf + c->len;
1178         stream.avail_out = GZ_CHUNK - c->len;
1179
1180         ret = deflate(&stream, Z_FINISH);
1181         if (ret < 0) {
1182                 /*
1183                  * Z_BUF_ERROR is special, it just means we need more
1184                  * output space. We'll handle that below. Treat any other
1185                  * error as fatal.
1186                  */
1187                 if (ret != Z_BUF_ERROR) {
1188                         log_err("fio: deflate log (%d)\n", ret);
1189                         flist_del(&c->list);
1190                         free_chunk(c);
1191                         goto err;
1192                 }
1193         }
1194
1195         total -= c->len;
1196         c->len = GZ_CHUNK - stream.avail_out;
1197         total += c->len;
1198         dprint(FD_COMPRESS, "seq=%d, chunk=%lu\n", seq, (unsigned long) c->len);
1199
1200         if (ret != Z_STREAM_END) {
1201                 do {
1202                         c = get_new_chunk(seq);
1203                         stream.avail_out = GZ_CHUNK;
1204                         stream.next_out = c->buf;
1205                         ret = deflate(&stream, Z_FINISH);
1206                         c->len = GZ_CHUNK - stream.avail_out;
1207                         total += c->len;
1208                         flist_add_tail(&c->list, &list);
1209                         dprint(FD_COMPRESS, "seq=%d, chunk=%lu\n", seq,
1210                                 (unsigned long) c->len);
1211                 } while (ret != Z_STREAM_END);
1212         }
1213
1214         dprint(FD_COMPRESS, "deflated to size=%lu\n", (unsigned long) total);
1215
1216         ret = deflateEnd(&stream);
1217         if (ret != Z_OK)
1218                 log_err("fio: deflateEnd %d\n", ret);
1219
1220         free(data->samples);
1221
1222         if (!flist_empty(&list)) {
1223                 pthread_mutex_lock(&data->log->chunk_lock);
1224                 flist_splice_tail(&list, &data->log->chunk_list);
1225                 pthread_mutex_unlock(&data->log->chunk_lock);
1226         }
1227
1228         ret = 0;
1229 done:
1230         if (data->free)
1231                 free(data);
1232         return ret;
1233 err:
1234         while (!flist_empty(&list)) {
1235                 c = flist_first_entry(list.next, struct iolog_compress, list);
1236                 flist_del(&c->list);
1237                 free_chunk(c);
1238         }
1239         ret = 1;
1240         goto done;
1241 }
1242
1243 /*
1244  * Invoked from our compress helper thread, when logging would have exceeded
1245  * the specified memory limitation. Compresses the previously stored
1246  * entries.
1247  */
1248 static int gz_work_async(struct submit_worker *sw, struct workqueue_work *work)
1249 {
1250         return gz_work(container_of(work, struct iolog_flush_data, work));
1251 }
1252
1253 static int gz_init_worker(struct submit_worker *sw)
1254 {
1255         struct thread_data *td = sw->wq->td;
1256
1257         if (!fio_option_is_set(&td->o, log_gz_cpumask))
1258                 return 0;
1259
1260         if (fio_setaffinity(gettid(), td->o.log_gz_cpumask) == -1) {
1261                 log_err("gz: failed to set CPU affinity\n");
1262                 return 1;
1263         }
1264
1265         return 0;
1266 }
1267
1268 static struct workqueue_ops log_compress_wq_ops = {
1269         .fn             = gz_work_async,
1270         .init_worker_fn = gz_init_worker,
1271         .nice           = 1,
1272 };
1273
1274 int iolog_compress_init(struct thread_data *td, struct sk_out *sk_out)
1275 {
1276         if (!(td->flags & TD_F_COMPRESS_LOG))
1277                 return 0;
1278
1279         workqueue_init(td, &td->log_compress_wq, &log_compress_wq_ops, 1, sk_out);
1280         return 0;
1281 }
1282
1283 void iolog_compress_exit(struct thread_data *td)
1284 {
1285         if (!(td->flags & TD_F_COMPRESS_LOG))
1286                 return;
1287
1288         workqueue_exit(&td->log_compress_wq);
1289 }
1290
1291 /*
1292  * Queue work item to compress the existing log entries. We reset the
1293  * current log to a small size, and reference the existing log in the
1294  * data that we queue for compression. Once compression has been done,
1295  * this old log is freed. If called with finish == true, will not return
1296  * until the log compression has completed, and will flush all previous
1297  * logs too
1298  */
1299 static int iolog_flush(struct io_log *log)
1300 {
1301         struct iolog_flush_data *data;
1302
1303         data = malloc(sizeof(*data));
1304         if (!data)
1305                 return 1;
1306
1307         data->log = log;
1308         data->free = false;
1309
1310         while (!flist_empty(&log->io_logs)) {
1311                 struct io_logs *cur_log;
1312
1313                 cur_log = flist_first_entry(&log->io_logs, struct io_logs, list);
1314                 flist_del_init(&cur_log->list);
1315
1316                 data->samples = cur_log->log;
1317                 data->nr_samples = cur_log->nr_samples;
1318
1319                 sfree(cur_log);
1320
1321                 gz_work(data);
1322         }
1323
1324         free(data);
1325         return 0;
1326 }
1327
1328 int iolog_cur_flush(struct io_log *log, struct io_logs *cur_log)
1329 {
1330         struct iolog_flush_data *data;
1331
1332         data = malloc(sizeof(*data));
1333         if (!data)
1334                 return 1;
1335
1336         data->log = log;
1337
1338         data->samples = cur_log->log;
1339         data->nr_samples = cur_log->nr_samples;
1340         data->free = true;
1341
1342         cur_log->nr_samples = cur_log->max_samples = 0;
1343         cur_log->log = NULL;
1344
1345         workqueue_enqueue(&log->td->log_compress_wq, &data->work);
1346         return 0;
1347 }
1348 #else
1349
1350 static int iolog_flush(struct io_log *log)
1351 {
1352         return 1;
1353 }
1354
1355 int iolog_cur_flush(struct io_log *log, struct io_logs *cur_log)
1356 {
1357         return 1;
1358 }
1359
1360 int iolog_compress_init(struct thread_data *td, struct sk_out *sk_out)
1361 {
1362         return 0;
1363 }
1364
1365 void iolog_compress_exit(struct thread_data *td)
1366 {
1367 }
1368
1369 #endif
1370
1371 struct io_logs *iolog_cur_log(struct io_log *log)
1372 {
1373         if (flist_empty(&log->io_logs))
1374                 return NULL;
1375
1376         return flist_last_entry(&log->io_logs, struct io_logs, list);
1377 }
1378
1379 uint64_t iolog_nr_samples(struct io_log *iolog)
1380 {
1381         struct flist_head *entry;
1382         uint64_t ret = 0;
1383
1384         flist_for_each(entry, &iolog->io_logs) {
1385                 struct io_logs *cur_log;
1386
1387                 cur_log = flist_entry(entry, struct io_logs, list);
1388                 ret += cur_log->nr_samples;
1389         }
1390
1391         return ret;
1392 }
1393
1394 static int __write_log(struct thread_data *td, struct io_log *log, int try)
1395 {
1396         if (log)
1397                 return finish_log(td, log, try);
1398
1399         return 0;
1400 }
1401
1402 static int write_iops_log(struct thread_data *td, int try, bool unit_log)
1403 {
1404         int ret;
1405
1406         if (per_unit_log(td->iops_log) != unit_log)
1407                 return 0;
1408
1409         ret = __write_log(td, td->iops_log, try);
1410         if (!ret)
1411                 td->iops_log = NULL;
1412
1413         return ret;
1414 }
1415
1416 static int write_slat_log(struct thread_data *td, int try, bool unit_log)
1417 {
1418         int ret;
1419
1420         if (!unit_log)
1421                 return 0;
1422
1423         ret = __write_log(td, td->slat_log, try);
1424         if (!ret)
1425                 td->slat_log = NULL;
1426
1427         return ret;
1428 }
1429
1430 static int write_clat_log(struct thread_data *td, int try, bool unit_log)
1431 {
1432         int ret;
1433
1434         if (!unit_log)
1435                 return 0;
1436
1437         ret = __write_log(td, td->clat_log, try);
1438         if (!ret)
1439                 td->clat_log = NULL;
1440
1441         return ret;
1442 }
1443
1444 static int write_clat_hist_log(struct thread_data *td, int try, bool unit_log)
1445 {
1446         int ret;
1447
1448         if (!unit_log)
1449                 return 0;
1450
1451         ret = __write_log(td, td->clat_hist_log, try);
1452         if (!ret)
1453                 td->clat_hist_log = NULL;
1454
1455         return ret;
1456 }
1457
1458 static int write_lat_log(struct thread_data *td, int try, bool unit_log)
1459 {
1460         int ret;
1461
1462         if (!unit_log)
1463                 return 0;
1464
1465         ret = __write_log(td, td->lat_log, try);
1466         if (!ret)
1467                 td->lat_log = NULL;
1468
1469         return ret;
1470 }
1471
1472 static int write_bandw_log(struct thread_data *td, int try, bool unit_log)
1473 {
1474         int ret;
1475
1476         if (per_unit_log(td->bw_log) != unit_log)
1477                 return 0;
1478
1479         ret = __write_log(td, td->bw_log, try);
1480         if (!ret)
1481                 td->bw_log = NULL;
1482
1483         return ret;
1484 }
1485
1486 enum {
1487         BW_LOG_MASK     = 1,
1488         LAT_LOG_MASK    = 2,
1489         SLAT_LOG_MASK   = 4,
1490         CLAT_LOG_MASK   = 8,
1491         IOPS_LOG_MASK   = 16,
1492         CLAT_HIST_LOG_MASK = 32,
1493
1494         ALL_LOG_NR      = 6,
1495 };
1496
1497 struct log_type {
1498         unsigned int mask;
1499         int (*fn)(struct thread_data *, int, bool);
1500 };
1501
1502 static struct log_type log_types[] = {
1503         {
1504                 .mask   = BW_LOG_MASK,
1505                 .fn     = write_bandw_log,
1506         },
1507         {
1508                 .mask   = LAT_LOG_MASK,
1509                 .fn     = write_lat_log,
1510         },
1511         {
1512                 .mask   = SLAT_LOG_MASK,
1513                 .fn     = write_slat_log,
1514         },
1515         {
1516                 .mask   = CLAT_LOG_MASK,
1517                 .fn     = write_clat_log,
1518         },
1519         {
1520                 .mask   = IOPS_LOG_MASK,
1521                 .fn     = write_iops_log,
1522         },
1523         {
1524                 .mask   = CLAT_HIST_LOG_MASK,
1525                 .fn     = write_clat_hist_log,
1526         }
1527 };
1528
1529 void td_writeout_logs(struct thread_data *td, bool unit_logs)
1530 {
1531         unsigned int log_mask = 0;
1532         unsigned int log_left = ALL_LOG_NR;
1533         int old_state, i;
1534
1535         old_state = td_bump_runstate(td, TD_FINISHING);
1536
1537         finalize_logs(td, unit_logs);
1538
1539         while (log_left) {
1540                 int prev_log_left = log_left;
1541
1542                 for (i = 0; i < ALL_LOG_NR && log_left; i++) {
1543                         struct log_type *lt = &log_types[i];
1544                         int ret;
1545
1546                         if (!(log_mask & lt->mask)) {
1547                                 ret = lt->fn(td, log_left != 1, unit_logs);
1548                                 if (!ret) {
1549                                         log_left--;
1550                                         log_mask |= lt->mask;
1551                                 }
1552                         }
1553                 }
1554
1555                 if (prev_log_left == log_left)
1556                         usleep(5000);
1557         }
1558
1559         td_restore_runstate(td, old_state);
1560 }
1561
1562 void fio_writeout_logs(bool unit_logs)
1563 {
1564         struct thread_data *td;
1565         int i;
1566
1567         for_each_td(td, i)
1568                 td_writeout_logs(td, unit_logs);
1569 }