stat.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include <sys/time.h>
   4 #include <sys/types.h>
   5 #include <sys/stat.h>
   6 #include <dirent.h>
   7 #include <libgen.h>
   8 #include <math.h>
   9
  10 #include "fio.h"
  11
  12 static struct itimerval itimer;
  13 static struct list_head disk_list = LIST_HEAD_INIT(disk_list);
  14
  15 static int get_io_ticks(struct disk_util *du, struct disk_util_stat *dus)
  16 {
  17         unsigned in_flight;
  18         char line[256];
  19         FILE *f;
  20         char *p;
  21
  22         f = fopen(du->path, "r");
  23         if (!f)
  24                 return 1;
  25
  26         p = fgets(line, sizeof(line), f);
  27         if (!p) {
  28                 fclose(f);
  29                 return 1;
  30         }
  31
  32         if (sscanf(p, "%u %u %llu %u %u %u %llu %u %u %u %u\n", &dus->ios[0], &dus->merges[0], &dus->sectors[0], &dus->ticks[0], &dus->ios[1], &dus->merges[1], &dus->sectors[1], &dus->ticks[1], &in_flight, &dus->io_ticks, &dus->time_in_queue) != 11) {
  33                 fclose(f);
  34                 return 1;
  35         }
  36
  37         fclose(f);
  38         return 0;
  39 }
  40
  41 static void update_io_tick_disk(struct disk_util *du)
  42 {
  43         struct disk_util_stat __dus, *dus, *ldus;
  44         struct timeval t;
  45
  46         if (get_io_ticks(du, &__dus))
  47                 return;
  48
  49         dus = &du->dus;
  50         ldus = &du->last_dus;
  51
  52         dus->sectors[0] += (__dus.sectors[0] - ldus->sectors[0]);
  53         dus->sectors[1] += (__dus.sectors[1] - ldus->sectors[1]);
  54         dus->ios[0] += (__dus.ios[0] - ldus->ios[0]);
  55         dus->ios[1] += (__dus.ios[1] - ldus->ios[1]);
  56         dus->merges[0] += (__dus.merges[0] - ldus->merges[0]);
  57         dus->merges[1] += (__dus.merges[1] - ldus->merges[1]);
  58         dus->ticks[0] += (__dus.ticks[0] - ldus->ticks[0]);
  59         dus->ticks[1] += (__dus.ticks[1] - ldus->ticks[1]);
  60         dus->io_ticks += (__dus.io_ticks - ldus->io_ticks);
  61         dus->time_in_queue += (__dus.time_in_queue - ldus->time_in_queue);
  62
  63         fio_gettime(&t, NULL);
  64         du->msec += mtime_since(&du->time, &t);
  65         memcpy(&du->time, &t, sizeof(t));
  66         memcpy(ldus, &__dus, sizeof(__dus));
  67 }
  68
  69 void update_io_ticks(void)
  70 {
  71         struct list_head *entry;
  72         struct disk_util *du;
  73
  74         list_for_each(entry, &disk_list) {
  75                 du = list_entry(entry, struct disk_util, list);
  76                 update_io_tick_disk(du);
  77         }
  78 }
  79
  80 static int disk_util_exists(dev_t dev)
  81 {
  82         struct list_head *entry;
  83         struct disk_util *du;
  84
  85         list_for_each(entry, &disk_list) {
  86                 du = list_entry(entry, struct disk_util, list);
  87
  88                 if (du->dev == dev)
  89                         return 1;
  90         }
  91
  92         return 0;
  93 }
  94
  95 static void disk_util_add(dev_t dev, char *path)
  96 {
  97         struct disk_util *du, *__du;
  98         struct list_head *entry;
  99
 100         du = malloc(sizeof(*du));
 101         memset(du, 0, sizeof(*du));
 102         INIT_LIST_HEAD(&du->list);
 103         sprintf(du->path, "%s/stat", path);
 104         du->name = strdup(basename(path));
 105         du->dev = dev;
 106
 107         list_for_each(entry, &disk_list) {
 108                 __du = list_entry(entry, struct disk_util, list);
 109
 110                 if (!strcmp(du->name, __du->name)) {
 111                         free(du->name);
 112                         free(du);
 113                         return;
 114                 }
 115         }
 116
 117         fio_gettime(&du->time, NULL);
 118         get_io_ticks(du, &du->last_dus);
 119
 120         list_add_tail(&du->list, &disk_list);
 121 }
 122
 123 static int check_dev_match(dev_t dev, char *path)
 124 {
 125         unsigned int major, minor;
 126         char line[256], *p;
 127         FILE *f;
 128
 129         f = fopen(path, "r");
 130         if (!f) {
 131                 perror("open path");
 132                 return 1;
 133         }
 134
 135         p = fgets(line, sizeof(line), f);
 136         if (!p) {
 137                 fclose(f);
 138                 return 1;
 139         }
 140
 141         if (sscanf(p, "%u:%u", &major, &minor) != 2) {
 142                 fclose(f);
 143                 return 1;
 144         }
 145
 146         if (((major << 8) | minor) == dev) {
 147                 fclose(f);
 148                 return 0;
 149         }
 150
 151         fclose(f);
 152         return 1;
 153 }
 154
 155 static int find_block_dir(dev_t dev, char *path)
 156 {
 157         struct dirent *dir;
 158         struct stat st;
 159         int found = 0;
 160         DIR *D;
 161
 162         D = opendir(path);
 163         if (!D)
 164                 return 0;
 165
 166         while ((dir = readdir(D)) != NULL) {
 167                 char full_path[256];
 168
 169                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
 170                         continue;
 171
 172                 sprintf(full_path, "%s/%s", path, dir->d_name);
 173
 174                 if (!strcmp(dir->d_name, "dev")) {
 175                         if (!check_dev_match(dev, full_path)) {
 176                                 found = 1;
 177                                 break;
 178                         }
 179                 }
 180
 181                 if (lstat(full_path, &st) == -1) {
 182                         perror("stat");
 183                         break;
 184                 }
 185
 186                 if (!S_ISDIR(st.st_mode) || S_ISLNK(st.st_mode))
 187                         continue;
 188
 189                 found = find_block_dir(dev, full_path);
 190                 if (found) {
 191                         strcpy(path, full_path);
 192                         break;
 193                 }
 194         }
 195
 196         closedir(D);
 197         return found;
 198 }
 199
 200 void init_disk_util(struct thread_data *td)
 201 {
 202         struct fio_file *f;
 203         struct stat st;
 204         char foo[PATH_MAX], tmp[PATH_MAX];
 205         dev_t dev;
 206         char *p;
 207
 208         if (!td->do_disk_util)
 209                 return;
 210
 211         /*
 212          * Just use the same file, they are on the same device.
 213          */
 214         f = &td->files[0];
 215         if (!stat(f->file_name, &st)) {
 216                 if (S_ISBLK(st.st_mode))
 217                         dev = st.st_rdev;
 218                 else
 219                         dev = st.st_dev;
 220         } else {
 221                 /*
 222                  * must be a file, open "." in that path
 223                  */
 224                 strncpy(foo, f->file_name, PATH_MAX - 1);
 225                 p = dirname(foo);
 226                 if (stat(p, &st)) {
 227                         perror("disk util stat");
 228                         return;
 229                 }
 230
 231                 dev = st.st_dev;
 232         }
 233
 234         if (disk_util_exists(dev))
 235                 return;
 236
 237         sprintf(foo, "/sys/block");
 238         if (!find_block_dir(dev, foo))
 239                 return;
 240
 241         /*
 242          * If there's a ../queue/ directory there, we are inside a partition.
 243          * Check if that is the case and jump back. For loop/md/dm etc we
 244          * are already in the right spot.
 245          */
 246         sprintf(tmp, "%s/../queue", foo);
 247         if (!stat(tmp, &st)) {
 248                 p = dirname(foo);
 249                 sprintf(tmp, "%s/queue", p);
 250                 if (stat(tmp, &st)) {
 251                         log_err("unknown sysfs layout\n");
 252                         return;
 253                 }
 254                 strncpy(tmp, p, PATH_MAX - 1);
 255                 sprintf(foo, "%s", tmp);
 256         }
 257
 258         if (td->ioscheduler)
 259                 td->sysfs_root = strdup(foo);
 260
 261         disk_util_add(dev, foo);
 262 }
 263
 264 void disk_util_timer_arm(void)
 265 {
 266         itimer.it_value.tv_sec = 0;
 267         itimer.it_value.tv_usec = DISK_UTIL_MSEC * 1000;
 268         setitimer(ITIMER_REAL, &itimer, NULL);
 269 }
 270
 271 void update_rusage_stat(struct thread_data *td)
 272 {
 273         getrusage(RUSAGE_SELF, &td->ru_end);
 274
 275         td->usr_time += mtime_since(&td->ru_start.ru_utime, &td->ru_end.ru_utime);
 276         td->sys_time += mtime_since(&td->ru_start.ru_stime, &td->ru_end.ru_stime);
 277         td->ctx += td->ru_end.ru_nvcsw + td->ru_end.ru_nivcsw - (td->ru_start.ru_nvcsw + td->ru_start.ru_nivcsw);
 278
 279         memcpy(&td->ru_start, &td->ru_end, sizeof(td->ru_end));
 280 }
 281
 282 static int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max,
 283                     double *mean, double *dev)
 284 {
 285         double n = is->samples;
 286
 287         if (is->samples == 0)
 288                 return 0;
 289
 290         *min = is->min_val;
 291         *max = is->max_val;
 292
 293         n = (double) is->samples;
 294         *mean = is->mean;
 295
 296         if (n > 1.0)
 297                 *dev = sqrt(is->S / (n - 1.0));
 298         else
 299                 *dev = -1.0;
 300
 301         return 1;
 302 }
 303
 304 static void show_group_stats(struct group_run_stats *rs, int id)
 305 {
 306         fprintf(f_out, "\nRun status group %d (all jobs):\n", id);
 307
 308         if (rs->max_run[DDIR_READ])
 309                 fprintf(f_out, "   READ: io=%lluMiB, aggrb=%llu, minb=%llu, maxb=%llu, mint=%llumsec, maxt=%llumsec\n", rs->io_kb[0] >> 10, rs->agg[0], rs->min_bw[0], rs->max_bw[0], rs->min_run[0], rs->max_run[0]);
 310         if (rs->max_run[DDIR_WRITE])
 311                 fprintf(f_out, "  WRITE: io=%lluMiB, aggrb=%llu, minb=%llu, maxb=%llu, mint=%llumsec, maxt=%llumsec\n", rs->io_kb[1] >> 10, rs->agg[1], rs->min_bw[1], rs->max_bw[1], rs->min_run[1], rs->max_run[1]);
 312 }
 313
 314 static void show_disk_util(void)
 315 {
 316         struct disk_util_stat *dus;
 317         struct list_head *entry, *next;
 318         struct disk_util *du;
 319         double util;
 320
 321         fprintf(f_out, "\nDisk stats (read/write):\n");
 322
 323         list_for_each(entry, &disk_list) {
 324                 du = list_entry(entry, struct disk_util, list);
 325                 dus = &du->dus;
 326
 327                 util = (double) 100 * du->dus.io_ticks / (double) du->msec;
 328                 if (util > 100.0)
 329                         util = 100.0;
 330
 331                 fprintf(f_out, "  %s: ios=%u/%u, merge=%u/%u, ticks=%u/%u, in_queue=%u, util=%3.2f%%\n", du->name, dus->ios[0], dus->ios[1], dus->merges[0], dus->merges[1], dus->ticks[0], dus->ticks[1], dus->time_in_queue, util);
 332         }
 333
 334         /*
 335          * now free the list
 336          */
 337         list_for_each_safe(entry, next, &disk_list) {
 338                 list_del(entry);
 339                 du = list_entry(entry, struct disk_util, list);
 340                 free(du->name);
 341                 free(du);
 342         }
 343 }
 344
 345 static void show_ddir_status(struct thread_data *td, struct group_run_stats *rs,
 346                              int ddir)
 347 {
 348         const char *ddir_str[] = { "read ", "write" };
 349         unsigned long min, max;
 350         unsigned long long bw;
 351         double mean, dev;
 352
 353         if (!td->runtime[ddir])
 354                 return;
 355
 356         bw = td->io_bytes[ddir] / td->runtime[ddir];
 357         fprintf(f_out, "  %s: io=%6lluMiB, bw=%6lluKiB/s, runt=%6lumsec\n", ddir_str[ddir], td->io_bytes[ddir] >> 20, bw, td->runtime[ddir]);
 358
 359         if (calc_lat(&td->slat_stat[ddir], &min, &max, &mean, &dev))
 360                 fprintf(f_out, "    slat (msec): min=%5lu, max=%5lu, avg=%5.02f, dev=%5.02f\n", min, max, mean, dev);
 361
 362         if (calc_lat(&td->clat_stat[ddir], &min, &max, &mean, &dev))
 363                 fprintf(f_out, "    clat (msec): min=%5lu, max=%5lu, avg=%5.02f, dev=%5.02f\n", min, max, mean, dev);
 364
 365         if (calc_lat(&td->bw_stat[ddir], &min, &max, &mean, &dev)) {
 366                 double p_of_agg;
 367
 368                 p_of_agg = mean * 100 / (double) rs->agg[ddir];
 369                 fprintf(f_out, "    bw (KiB/s) : min=%5lu, max=%5lu, per=%3.2f%%, avg=%5.02f, dev=%5.02f\n", min, max, p_of_agg, mean, dev);
 370         }
 371 }
 372
 373 static void show_thread_status(struct thread_data *td,
 374                                struct group_run_stats *rs)
 375 {
 376         double usr_cpu, sys_cpu;
 377         unsigned long runtime;
 378
 379         if (!(td->io_bytes[0] + td->io_bytes[1]) && !td->error)
 380                 return;
 381
 382         fprintf(f_out, "%s: (groupid=%d): err=%2d:\n",td->name, td->groupid, td->error);
 383
 384         show_ddir_status(td, rs, td->ddir);
 385         if (td->io_bytes[td->ddir ^ 1])
 386                 show_ddir_status(td, rs, td->ddir ^ 1);
 387
 388         runtime = mtime_since(&td->epoch, &td->end_time);
 389         if (runtime) {
 390                 double runt = (double) runtime;
 391
 392                 usr_cpu = (double) td->usr_time * 100 / runt;
 393                 sys_cpu = (double) td->sys_time * 100 / runt;
 394         } else {
 395                 usr_cpu = 0;
 396                 sys_cpu = 0;
 397         }
 398
 399         fprintf(f_out, "  cpu          : usr=%3.2f%%, sys=%3.2f%%, ctx=%lu\n", usr_cpu, sys_cpu, td->ctx);
 400 }
 401
 402 static void show_ddir_status_terse(struct thread_data *td,
 403                                    struct group_run_stats *rs, int ddir)
 404 {
 405         unsigned long min, max;
 406         unsigned long long bw;
 407         double mean, dev;
 408
 409         bw = 0;
 410         if (td->runtime[ddir])
 411                 bw = td->io_bytes[ddir] / td->runtime[ddir];
 412
 413         fprintf(f_out, ",%llu,%llu,%lu", td->io_bytes[ddir] >> 10, bw, td->runtime[ddir]);
 414
 415         if (calc_lat(&td->slat_stat[ddir], &min, &max, &mean, &dev))
 416                 fprintf(f_out, ",%lu,%lu,%f,%f", min, max, mean, dev);
 417         else
 418                 fprintf(f_out, ",%lu,%lu,%f,%f", 0UL, 0UL, 0.0, 0.0);
 419
 420         if (calc_lat(&td->clat_stat[ddir], &min, &max, &mean, &dev))
 421                 fprintf(f_out, ",%lu,%lu,%f,%f", min, max, mean, dev);
 422         else
 423                 fprintf(f_out, ",%lu,%lu,%f,%f", 0UL, 0UL, 0.0, 0.0);
 424
 425         if (calc_lat(&td->bw_stat[ddir], &min, &max, &mean, &dev)) {
 426                 double p_of_agg;
 427
 428                 p_of_agg = mean * 100 / (double) rs->agg[ddir];
 429                 fprintf(f_out, ",%lu,%lu,%f%%,%f,%f", min, max, p_of_agg, mean, dev);
 430         } else
 431                 fprintf(f_out, ",%lu,%lu,%f%%,%f,%f", 0UL, 0UL, 0.0, 0.0, 0.0);
 432
 433 }
 434
 435
 436 static void show_thread_status_terse(struct thread_data *td,
 437                                      struct group_run_stats *rs)
 438 {
 439         double usr_cpu, sys_cpu;
 440
 441         fprintf(f_out, "%s,%d,%d",td->name, td->groupid, td->error);
 442
 443         show_ddir_status_terse(td, rs, 0);
 444         show_ddir_status_terse(td, rs, 1);
 445
 446         if (td->runtime[0] + td->runtime[1]) {
 447                 double runt = (double) (td->runtime[0] + td->runtime[1]);
 448
 449                 usr_cpu = (double) td->usr_time * 100 / runt;
 450                 sys_cpu = (double) td->sys_time * 100 / runt;
 451         } else {
 452                 usr_cpu = 0;
 453                 sys_cpu = 0;
 454         }
 455
 456         fprintf(f_out, ",%f%%,%f%%,%lu\n", usr_cpu, sys_cpu, td->ctx);
 457 }
 458
 459 void show_run_stats(void)
 460 {
 461         struct group_run_stats *runstats, *rs;
 462         struct thread_data *td;
 463         int i;
 464
 465         runstats = malloc(sizeof(struct group_run_stats) * (groupid + 1));
 466
 467         for (i = 0; i < groupid + 1; i++) {
 468                 rs = &runstats[i];
 469
 470                 memset(rs, 0, sizeof(*rs));
 471                 rs->min_bw[0] = rs->min_run[0] = ~0UL;
 472                 rs->min_bw[1] = rs->min_run[1] = ~0UL;
 473         }
 474
 475         for_each_td(td, i) {
 476                 unsigned long long rbw, wbw;
 477
 478                 if (td->error) {
 479                         fprintf(f_out, "%s: %s\n", td->name, td->verror);
 480                         continue;
 481                 }
 482
 483                 rs = &runstats[td->groupid];
 484
 485                 if (td->runtime[0] < rs->min_run[0] || !rs->min_run[0])
 486                         rs->min_run[0] = td->runtime[0];
 487                 if (td->runtime[0] > rs->max_run[0])
 488                         rs->max_run[0] = td->runtime[0];
 489                 if (td->runtime[1] < rs->min_run[1] || !rs->min_run[1])
 490                         rs->min_run[1] = td->runtime[1];
 491                 if (td->runtime[1] > rs->max_run[1])
 492                         rs->max_run[1] = td->runtime[1];
 493
 494                 rbw = wbw = 0;
 495                 if (td->runtime[0])
 496                         rbw = td->io_bytes[0] / (unsigned long long) td->runtime[0];
 497                 if (td->runtime[1])
 498                         wbw = td->io_bytes[1] / (unsigned long long) td->runtime[1];
 499
 500                 if (rbw < rs->min_bw[0])
 501                         rs->min_bw[0] = rbw;
 502                 if (wbw < rs->min_bw[1])
 503                         rs->min_bw[1] = wbw;
 504                 if (rbw > rs->max_bw[0])
 505                         rs->max_bw[0] = rbw;
 506                 if (wbw > rs->max_bw[1])
 507                         rs->max_bw[1] = wbw;
 508
 509                 rs->io_kb[0] += td->io_bytes[0] >> 10;
 510                 rs->io_kb[1] += td->io_bytes[1] >> 10;
 511         }
 512
 513         for (i = 0; i < groupid + 1; i++) {
 514                 rs = &runstats[i];
 515
 516                 if (rs->max_run[0])
 517                         rs->agg[0] = (rs->io_kb[0]*1024) / rs->max_run[0];
 518                 if (rs->max_run[1])
 519                         rs->agg[1] = (rs->io_kb[1]*1024) / rs->max_run[1];
 520         }
 521
 522         /*
 523          * don't overwrite last signal output
 524          */
 525         if (!terse_output)
 526                 printf("\n");
 527
 528         for_each_td(td, i) {
 529                 rs = &runstats[td->groupid];
 530
 531                 if (terse_output)
 532                         show_thread_status_terse(td, rs);
 533                 else
 534                         show_thread_status(td, rs);
 535         }
 536
 537         if (!terse_output) {
 538                 for (i = 0; i < groupid + 1; i++)
 539                         show_group_stats(&runstats[i], i);
 540
 541                 show_disk_util();
 542         }
 543
 544         free(runstats);
 545 }
 546
 547 static inline void add_stat_sample(struct io_stat *is, unsigned long data)
 548 {
 549         double val = data;
 550         double delta, n;
 551
 552         if (data > is->max_val)
 553                 is->max_val = data;
 554         if (data < is->min_val)
 555                 is->min_val = data;
 556
 557         delta = val - is->mean;
 558         n = is->samples + 1.0;
 559         is->mean += delta / n;
 560         is->S += delta * (val - is->mean);
 561
 562         is->samples++;
 563 }
 564
 565 static void add_log_sample(struct thread_data *td, struct io_log *iolog,
 566                            unsigned long val, enum fio_ddir ddir)
 567 {
 568         if (iolog->nr_samples == iolog->max_samples) {
 569                 int new_size = sizeof(struct io_sample) * iolog->max_samples*2;
 570
 571                 iolog->log = realloc(iolog->log, new_size);
 572                 iolog->max_samples <<= 1;
 573         }
 574
 575         iolog->log[iolog->nr_samples].val = val;
 576         iolog->log[iolog->nr_samples].time = mtime_since_now(&td->epoch);
 577         iolog->log[iolog->nr_samples].ddir = ddir;
 578         iolog->nr_samples++;
 579 }
 580
 581 void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
 582                      unsigned long msec)
 583 {
 584         add_stat_sample(&td->clat_stat[ddir], msec);
 585
 586         if (td->clat_log)
 587                 add_log_sample(td, td->clat_log, msec, ddir);
 588 }
 589
 590 void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
 591                      unsigned long msec)
 592 {
 593         add_stat_sample(&td->slat_stat[ddir], msec);
 594
 595         if (td->slat_log)
 596                 add_log_sample(td, td->slat_log, msec, ddir);
 597 }
 598
 599 void add_bw_sample(struct thread_data *td, enum fio_ddir ddir,
 600                    struct timeval *t)
 601 {
 602         unsigned long spent = mtime_since(&td->stat_sample_time[ddir], t);
 603         unsigned long rate;
 604
 605         if (spent < td->bw_avg_time)
 606                 return;
 607
 608         rate = (td->this_io_bytes[ddir] - td->stat_io_bytes[ddir]) / spent;
 609         add_stat_sample(&td->bw_stat[ddir], rate);
 610
 611         if (td->bw_log)
 612                 add_log_sample(td, td->bw_log, rate, ddir);
 613
 614         fio_gettime(&td->stat_sample_time[ddir], NULL);
 615         td->stat_io_bytes[ddir] = td->this_io_bytes[ddir];
 616 }
 617
 618