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 #include "diskutil.h"
  12 #include "lib/ieee754.h"
  13 #include "json.h"
  14 #include "lib/getrusage.h"
  15 #include "idletime.h"
  16
  17 static struct fio_mutex *stat_mutex;
  18
  19 void update_rusage_stat(struct thread_data *td)
  20 {
  21         struct thread_stat *ts = &td->ts;
  22
  23         fio_getrusage(&td->ru_end);
  24         ts->usr_time += mtime_since(&td->ru_start.ru_utime,
  25                                         &td->ru_end.ru_utime);
  26         ts->sys_time += mtime_since(&td->ru_start.ru_stime,
  27                                         &td->ru_end.ru_stime);
  28         ts->ctx += td->ru_end.ru_nvcsw + td->ru_end.ru_nivcsw
  29                         - (td->ru_start.ru_nvcsw + td->ru_start.ru_nivcsw);
  30         ts->minf += td->ru_end.ru_minflt - td->ru_start.ru_minflt;
  31         ts->majf += td->ru_end.ru_majflt - td->ru_start.ru_majflt;
  32
  33         memcpy(&td->ru_start, &td->ru_end, sizeof(td->ru_end));
  34 }
  35
  36 /*
  37  * Given a latency, return the index of the corresponding bucket in
  38  * the structure tracking percentiles.
  39  *
  40  * (1) find the group (and error bits) that the value (latency)
  41  * belongs to by looking at its MSB. (2) find the bucket number in the
  42  * group by looking at the index bits.
  43  *
  44  */
  45 static unsigned int plat_val_to_idx(unsigned int val)
  46 {
  47         unsigned int msb, error_bits, base, offset, idx;
  48
  49         /* Find MSB starting from bit 0 */
  50         if (val == 0)
  51                 msb = 0;
  52         else
  53                 msb = (sizeof(val)*8) - __builtin_clz(val) - 1;
  54
  55         /*
  56          * MSB <= (FIO_IO_U_PLAT_BITS-1), cannot be rounded off. Use
  57          * all bits of the sample as index
  58          */
  59         if (msb <= FIO_IO_U_PLAT_BITS)
  60                 return val;
  61
  62         /* Compute the number of error bits to discard*/
  63         error_bits = msb - FIO_IO_U_PLAT_BITS;
  64
  65         /* Compute the number of buckets before the group */
  66         base = (error_bits + 1) << FIO_IO_U_PLAT_BITS;
  67
  68         /*
  69          * Discard the error bits and apply the mask to find the
  70          * index for the buckets in the group
  71          */
  72         offset = (FIO_IO_U_PLAT_VAL - 1) & (val >> error_bits);
  73
  74         /* Make sure the index does not exceed (array size - 1) */
  75         idx = (base + offset) < (FIO_IO_U_PLAT_NR - 1) ?
  76                 (base + offset) : (FIO_IO_U_PLAT_NR - 1);
  77
  78         return idx;
  79 }
  80
  81 /*
  82  * Convert the given index of the bucket array to the value
  83  * represented by the bucket
  84  */
  85 static unsigned int plat_idx_to_val(unsigned int idx)
  86 {
  87         unsigned int error_bits, k, base;
  88
  89         assert(idx < FIO_IO_U_PLAT_NR);
  90
  91         /* MSB <= (FIO_IO_U_PLAT_BITS-1), cannot be rounded off. Use
  92          * all bits of the sample as index */
  93         if (idx < (FIO_IO_U_PLAT_VAL << 1))
  94                 return idx;
  95
  96         /* Find the group and compute the minimum value of that group */
  97         error_bits = (idx >> FIO_IO_U_PLAT_BITS) - 1;
  98         base = 1 << (error_bits + FIO_IO_U_PLAT_BITS);
  99
 100         /* Find its bucket number of the group */
 101         k = idx % FIO_IO_U_PLAT_VAL;
 102
 103         /* Return the mean of the range of the bucket */
 104         return base + ((k + 0.5) * (1 << error_bits));
 105 }
 106
 107 static int double_cmp(const void *a, const void *b)
 108 {
 109         const fio_fp64_t fa = *(const fio_fp64_t *) a;
 110         const fio_fp64_t fb = *(const fio_fp64_t *) b;
 111         int cmp = 0;
 112
 113         if (fa.u.f > fb.u.f)
 114                 cmp = 1;
 115         else if (fa.u.f < fb.u.f)
 116                 cmp = -1;
 117
 118         return cmp;
 119 }
 120
 121 unsigned int calc_clat_percentiles(unsigned int *io_u_plat, unsigned long nr,
 122                                    fio_fp64_t *plist, unsigned int **output,
 123                                    unsigned int *maxv, unsigned int *minv)
 124 {
 125         unsigned long sum = 0;
 126         unsigned int len, i, j = 0;
 127         unsigned int oval_len = 0;
 128         unsigned int *ovals = NULL;
 129         int is_last;
 130
 131         *minv = -1U;
 132         *maxv = 0;
 133
 134         len = 0;
 135         while (len < FIO_IO_U_LIST_MAX_LEN && plist[len].u.f != 0.0)
 136                 len++;
 137
 138         if (!len)
 139                 return 0;
 140
 141         /*
 142          * Sort the percentile list. Note that it may already be sorted if
 143          * we are using the default values, but since it's a short list this
 144          * isn't a worry. Also note that this does not work for NaN values.
 145          */
 146         if (len > 1)
 147                 qsort((void *)plist, len, sizeof(plist[0]), double_cmp);
 148
 149         /*
 150          * Calculate bucket values, note down max and min values
 151          */
 152         is_last = 0;
 153         for (i = 0; i < FIO_IO_U_PLAT_NR && !is_last; i++) {
 154                 sum += io_u_plat[i];
 155                 while (sum >= (plist[j].u.f / 100.0 * nr)) {
 156                         assert(plist[j].u.f <= 100.0);
 157
 158                         if (j == oval_len) {
 159                                 oval_len += 100;
 160                                 ovals = realloc(ovals, oval_len * sizeof(unsigned int));
 161                         }
 162
 163                         ovals[j] = plat_idx_to_val(i);
 164                         if (ovals[j] < *minv)
 165                                 *minv = ovals[j];
 166                         if (ovals[j] > *maxv)
 167                                 *maxv = ovals[j];
 168
 169                         is_last = (j == len - 1);
 170                         if (is_last)
 171                                 break;
 172
 173                         j++;
 174                 }
 175         }
 176
 177         *output = ovals;
 178         return len;
 179 }
 180
 181 /*
 182  * Find and display the p-th percentile of clat
 183  */
 184 static void show_clat_percentiles(unsigned int *io_u_plat, unsigned long nr,
 185                                   fio_fp64_t *plist, unsigned int precision)
 186 {
 187         unsigned int len, j = 0, minv, maxv;
 188         unsigned int *ovals;
 189         int is_last, per_line, scale_down;
 190         char fmt[32];
 191
 192         len = calc_clat_percentiles(io_u_plat, nr, plist, &ovals, &maxv, &minv);
 193         if (!len)
 194                 goto out;
 195
 196         /*
 197          * We default to usecs, but if the value range is such that we
 198          * should scale down to msecs, do that.
 199          */
 200         if (minv > 2000 && maxv > 99999) {
 201                 scale_down = 1;
 202                 log_info("    clat percentiles (msec):\n     |");
 203         } else {
 204                 scale_down = 0;
 205                 log_info("    clat percentiles (usec):\n     |");
 206         }
 207
 208         snprintf(fmt, sizeof(fmt), "%%1.%uf", precision);
 209         per_line = (80 - 7) / (precision + 14);
 210
 211         for (j = 0; j < len; j++) {
 212                 char fbuf[16], *ptr = fbuf;
 213
 214                 /* for formatting */
 215                 if (j != 0 && (j % per_line) == 0)
 216                         log_info("     |");
 217
 218                 /* end of the list */
 219                 is_last = (j == len - 1);
 220
 221                 if (plist[j].u.f < 10.0)
 222                         ptr += sprintf(fbuf, " ");
 223
 224                 snprintf(ptr, sizeof(fbuf), fmt, plist[j].u.f);
 225
 226                 if (scale_down)
 227                         ovals[j] = (ovals[j] + 999) / 1000;
 228
 229                 log_info(" %sth=[%5u]%c", fbuf, ovals[j], is_last ? '\n' : ',');
 230
 231                 if (is_last)
 232                         break;
 233
 234                 if ((j % per_line) == per_line - 1)     /* for formatting */
 235                         log_info("\n");
 236         }
 237
 238 out:
 239         if (ovals)
 240                 free(ovals);
 241 }
 242
 243 int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max,
 244              double *mean, double *dev)
 245 {
 246         double n = (double) is->samples;
 247
 248         if (n == 0)
 249                 return 0;
 250
 251         *min = is->min_val;
 252         *max = is->max_val;
 253         *mean = is->mean.u.f;
 254
 255         if (n > 1.0)
 256                 *dev = sqrt(is->S.u.f / (n - 1.0));
 257         else
 258                 *dev = 0;
 259
 260         return 1;
 261 }
 262
 263 void show_group_stats(struct group_run_stats *rs)
 264 {
 265         char *p1, *p2, *p3, *p4;
 266         const char *ddir_str[] = { "   READ", "  WRITE" , "   TRIM"};
 267         int i;
 268
 269         log_info("\nRun status group %d (all jobs):\n", rs->groupid);
 270
 271         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
 272                 const int i2p = is_power_of_2(rs->kb_base);
 273
 274                 if (!rs->max_run[i])
 275                         continue;
 276
 277                 p1 = num2str(rs->io_kb[i], 6, rs->kb_base, i2p, 8);
 278                 p2 = num2str(rs->agg[i], 6, rs->kb_base, i2p, rs->unit_base);
 279                 p3 = num2str(rs->min_bw[i], 6, rs->kb_base, i2p, rs->unit_base);
 280                 p4 = num2str(rs->max_bw[i], 6, rs->kb_base, i2p, rs->unit_base);
 281
 282                 log_info("%s: io=%s, aggrb=%s/s, minb=%s/s, maxb=%s/s,"
 283                          " mint=%llumsec, maxt=%llumsec\n",
 284                                 rs->unified_rw_rep ? "  MIXED" : ddir_str[i],
 285                                 p1, p2, p3, p4,
 286                                 (unsigned long long) rs->min_run[i],
 287                                 (unsigned long long) rs->max_run[i]);
 288
 289                 free(p1);
 290                 free(p2);
 291                 free(p3);
 292                 free(p4);
 293         }
 294 }
 295
 296 void stat_calc_dist(unsigned int *map, unsigned long total, double *io_u_dist)
 297 {
 298         int i;
 299
 300         /*
 301          * Do depth distribution calculations
 302          */
 303         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 304                 if (total) {
 305                         io_u_dist[i] = (double) map[i] / (double) total;
 306                         io_u_dist[i] *= 100.0;
 307                         if (io_u_dist[i] < 0.1 && map[i])
 308                                 io_u_dist[i] = 0.1;
 309                 } else
 310                         io_u_dist[i] = 0.0;
 311         }
 312 }
 313
 314 static void stat_calc_lat(struct thread_stat *ts, double *dst,
 315                           unsigned int *src, int nr)
 316 {
 317         unsigned long total = ddir_rw_sum(ts->total_io_u);
 318         int i;
 319
 320         /*
 321          * Do latency distribution calculations
 322          */
 323         for (i = 0; i < nr; i++) {
 324                 if (total) {
 325                         dst[i] = (double) src[i] / (double) total;
 326                         dst[i] *= 100.0;
 327                         if (dst[i] < 0.01 && src[i])
 328                                 dst[i] = 0.01;
 329                 } else
 330                         dst[i] = 0.0;
 331         }
 332 }
 333
 334 void stat_calc_lat_u(struct thread_stat *ts, double *io_u_lat)
 335 {
 336         stat_calc_lat(ts, io_u_lat, ts->io_u_lat_u, FIO_IO_U_LAT_U_NR);
 337 }
 338
 339 void stat_calc_lat_m(struct thread_stat *ts, double *io_u_lat)
 340 {
 341         stat_calc_lat(ts, io_u_lat, ts->io_u_lat_m, FIO_IO_U_LAT_M_NR);
 342 }
 343
 344 static void display_lat(const char *name, unsigned long min, unsigned long max,
 345                         double mean, double dev)
 346 {
 347         const char *base = "(usec)";
 348         char *minp, *maxp;
 349
 350         if (!usec_to_msec(&min, &max, &mean, &dev))
 351                 base = "(msec)";
 352
 353         minp = num2str(min, 6, 1, 0, 0);
 354         maxp = num2str(max, 6, 1, 0, 0);
 355
 356         log_info("    %s %s: min=%s, max=%s, avg=%5.02f,"
 357                  " stdev=%5.02f\n", name, base, minp, maxp, mean, dev);
 358
 359         free(minp);
 360         free(maxp);
 361 }
 362
 363 static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
 364                              int ddir)
 365 {
 366         const char *ddir_str[] = { "read ", "write", "trim" };
 367         unsigned long min, max, runt;
 368         unsigned long long bw, iops;
 369         double mean, dev;
 370         char *io_p, *bw_p, *iops_p;
 371         int i2p;
 372
 373         assert(ddir_rw(ddir));
 374
 375         if (!ts->runtime[ddir])
 376                 return;
 377
 378         i2p = is_power_of_2(rs->kb_base);
 379         runt = ts->runtime[ddir];
 380
 381         bw = (1000 * ts->io_bytes[ddir]) / runt;
 382         io_p = num2str(ts->io_bytes[ddir], 6, 1, i2p, 8);
 383         bw_p = num2str(bw, 6, 1, i2p, ts->unit_base);
 384
 385         iops = (1000 * (uint64_t)ts->total_io_u[ddir]) / runt;
 386         iops_p = num2str(iops, 6, 1, 0, 0);
 387
 388         log_info("  %s: io=%s, bw=%s/s, iops=%s, runt=%6llumsec\n",
 389                                 rs->unified_rw_rep ? "mixed" : ddir_str[ddir],
 390                                 io_p, bw_p, iops_p,
 391                                 (unsigned long long) ts->runtime[ddir]);
 392
 393         free(io_p);
 394         free(bw_p);
 395         free(iops_p);
 396
 397         if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
 398                 display_lat("slat", min, max, mean, dev);
 399         if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev))
 400                 display_lat("clat", min, max, mean, dev);
 401         if (calc_lat(&ts->lat_stat[ddir], &min, &max, &mean, &dev))
 402                 display_lat(" lat", min, max, mean, dev);
 403
 404         if (ts->clat_percentiles) {
 405                 show_clat_percentiles(ts->io_u_plat[ddir],
 406                                         ts->clat_stat[ddir].samples,
 407                                         ts->percentile_list,
 408                                         ts->percentile_precision);
 409         }
 410         if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
 411                 double p_of_agg = 100.0, fkb_base = (double)rs->kb_base;
 412                 const char *bw_str = (rs->unit_base == 1 ? "Kbit" : "KB");
 413
 414                 if (rs->unit_base == 1) {
 415                         min *= 8.0;
 416                         max *= 8.0;
 417                         mean *= 8.0;
 418                         dev *= 8.0;
 419                 }
 420
 421                 if (rs->agg[ddir]) {
 422                         p_of_agg = mean * 100 / (double) rs->agg[ddir];
 423                         if (p_of_agg > 100.0)
 424                                 p_of_agg = 100.0;
 425                 }
 426
 427                 if (mean > fkb_base * fkb_base) {
 428                         min /= fkb_base;
 429                         max /= fkb_base;
 430                         mean /= fkb_base;
 431                         dev /= fkb_base;
 432                         bw_str = (rs->unit_base == 1 ? "Mbit" : "MB");
 433                 }
 434
 435                 log_info("    bw (%-4s/s): min=%5lu, max=%5lu, per=%3.2f%%,"
 436                          " avg=%5.02f, stdev=%5.02f\n", bw_str, min, max,
 437                                                         p_of_agg, mean, dev);
 438         }
 439 }
 440
 441 static int show_lat(double *io_u_lat, int nr, const char **ranges,
 442                     const char *msg)
 443 {
 444         int new_line = 1, i, line = 0, shown = 0;
 445
 446         for (i = 0; i < nr; i++) {
 447                 if (io_u_lat[i] <= 0.0)
 448                         continue;
 449                 shown = 1;
 450                 if (new_line) {
 451                         if (line)
 452                                 log_info("\n");
 453                         log_info("    lat (%s) : ", msg);
 454                         new_line = 0;
 455                         line = 0;
 456                 }
 457                 if (line)
 458                         log_info(", ");
 459                 log_info("%s%3.2f%%", ranges[i], io_u_lat[i]);
 460                 line++;
 461                 if (line == 5)
 462                         new_line = 1;
 463         }
 464
 465         if (shown)
 466                 log_info("\n");
 467
 468         return shown;
 469 }
 470
 471 static void show_lat_u(double *io_u_lat_u)
 472 {
 473         const char *ranges[] = { "2=", "4=", "10=", "20=", "50=", "100=",
 474                                  "250=", "500=", "750=", "1000=", };
 475
 476         show_lat(io_u_lat_u, FIO_IO_U_LAT_U_NR, ranges, "usec");
 477 }
 478
 479 static void show_lat_m(double *io_u_lat_m)
 480 {
 481         const char *ranges[] = { "2=", "4=", "10=", "20=", "50=", "100=",
 482                                  "250=", "500=", "750=", "1000=", "2000=",
 483                                  ">=2000=", };
 484
 485         show_lat(io_u_lat_m, FIO_IO_U_LAT_M_NR, ranges, "msec");
 486 }
 487
 488 static void show_latencies(struct thread_stat *ts)
 489 {
 490         double io_u_lat_u[FIO_IO_U_LAT_U_NR];
 491         double io_u_lat_m[FIO_IO_U_LAT_M_NR];
 492
 493         stat_calc_lat_u(ts, io_u_lat_u);
 494         stat_calc_lat_m(ts, io_u_lat_m);
 495
 496         show_lat_u(io_u_lat_u);
 497         show_lat_m(io_u_lat_m);
 498 }
 499
 500 static void show_thread_status_normal(struct thread_stat *ts,
 501                                       struct group_run_stats *rs)
 502 {
 503         double usr_cpu, sys_cpu;
 504         unsigned long runtime;
 505         double io_u_dist[FIO_IO_U_MAP_NR];
 506         time_t time_p;
 507         char time_buf[64];
 508
 509         if (!(ts->io_bytes[DDIR_READ] + ts->io_bytes[DDIR_WRITE] +
 510             ts->io_bytes[DDIR_TRIM]) && !(ts->total_io_u[DDIR_READ] +
 511             ts->total_io_u[DDIR_WRITE] + ts->total_io_u[DDIR_TRIM]))
 512                 return;
 513
 514         time(&time_p);
 515         os_ctime_r((const time_t *) &time_p, time_buf, sizeof(time_buf));
 516
 517         if (!ts->error) {
 518                 log_info("%s: (groupid=%d, jobs=%d): err=%2d: pid=%d: %s",
 519                                         ts->name, ts->groupid, ts->members,
 520                                         ts->error, (int) ts->pid, time_buf);
 521         } else {
 522                 log_info("%s: (groupid=%d, jobs=%d): err=%2d (%s): pid=%d: %s",
 523                                         ts->name, ts->groupid, ts->members,
 524                                         ts->error, ts->verror, (int) ts->pid,
 525                                         time_buf);
 526         }
 527
 528         if (strlen(ts->description))
 529                 log_info("  Description  : [%s]\n", ts->description);
 530
 531         if (ts->io_bytes[DDIR_READ])
 532                 show_ddir_status(rs, ts, DDIR_READ);
 533         if (ts->io_bytes[DDIR_WRITE])
 534                 show_ddir_status(rs, ts, DDIR_WRITE);
 535         if (ts->io_bytes[DDIR_TRIM])
 536                 show_ddir_status(rs, ts, DDIR_TRIM);
 537
 538         show_latencies(ts);
 539
 540         runtime = ts->total_run_time;
 541         if (runtime) {
 542                 double runt = (double) runtime;
 543
 544                 usr_cpu = (double) ts->usr_time * 100 / runt;
 545                 sys_cpu = (double) ts->sys_time * 100 / runt;
 546         } else {
 547                 usr_cpu = 0;
 548                 sys_cpu = 0;
 549         }
 550
 551         log_info("  cpu          : usr=%3.2f%%, sys=%3.2f%%, ctx=%llu,"
 552                  " majf=%llu, minf=%llu\n", usr_cpu, sys_cpu,
 553                         (unsigned long long) ts->ctx,
 554                         (unsigned long long) ts->majf,
 555                         (unsigned long long) ts->minf);
 556
 557         stat_calc_dist(ts->io_u_map, ddir_rw_sum(ts->total_io_u), io_u_dist);
 558         log_info("  IO depths    : 1=%3.1f%%, 2=%3.1f%%, 4=%3.1f%%, 8=%3.1f%%,"
 559                  " 16=%3.1f%%, 32=%3.1f%%, >=64=%3.1f%%\n", io_u_dist[0],
 560                                         io_u_dist[1], io_u_dist[2],
 561                                         io_u_dist[3], io_u_dist[4],
 562                                         io_u_dist[5], io_u_dist[6]);
 563
 564         stat_calc_dist(ts->io_u_submit, ts->total_submit, io_u_dist);
 565         log_info("     submit    : 0=%3.1f%%, 4=%3.1f%%, 8=%3.1f%%, 16=%3.1f%%,"
 566                  " 32=%3.1f%%, 64=%3.1f%%, >=64=%3.1f%%\n", io_u_dist[0],
 567                                         io_u_dist[1], io_u_dist[2],
 568                                         io_u_dist[3], io_u_dist[4],
 569                                         io_u_dist[5], io_u_dist[6]);
 570         stat_calc_dist(ts->io_u_complete, ts->total_complete, io_u_dist);
 571         log_info("     complete  : 0=%3.1f%%, 4=%3.1f%%, 8=%3.1f%%, 16=%3.1f%%,"
 572                  " 32=%3.1f%%, 64=%3.1f%%, >=64=%3.1f%%\n", io_u_dist[0],
 573                                         io_u_dist[1], io_u_dist[2],
 574                                         io_u_dist[3], io_u_dist[4],
 575                                         io_u_dist[5], io_u_dist[6]);
 576         log_info("     issued    : total=r=%llu/w=%llu/d=%llu,"
 577                                  " short=r=%llu/w=%llu/d=%llu\n",
 578                                         (unsigned long long) ts->total_io_u[0],
 579                                         (unsigned long long) ts->total_io_u[1],
 580                                         (unsigned long long) ts->total_io_u[2],
 581                                         (unsigned long long) ts->short_io_u[0],
 582                                         (unsigned long long) ts->short_io_u[1],
 583                                         (unsigned long long) ts->short_io_u[2]);
 584         if (ts->continue_on_error) {
 585                 log_info("     errors    : total=%llu, first_error=%d/<%s>\n",
 586                                         (unsigned long long)ts->total_err_count,
 587                                         ts->first_error,
 588                                         strerror(ts->first_error));
 589         }
 590         if (ts->latency_depth) {
 591                 log_info("     latency   : target=%llu, window=%llu, percentile=%.2f%%, depth=%u\n",
 592                                         (unsigned long long)ts->latency_target,
 593                                         (unsigned long long)ts->latency_window,
 594                                         ts->latency_percentile.u.f,
 595                                         ts->latency_depth);
 596         }
 597 }
 598
 599 static void show_ddir_status_terse(struct thread_stat *ts,
 600                                    struct group_run_stats *rs, int ddir)
 601 {
 602         unsigned long min, max;
 603         unsigned long long bw, iops;
 604         unsigned int *ovals = NULL;
 605         double mean, dev;
 606         unsigned int len, minv, maxv;
 607         int i;
 608
 609         assert(ddir_rw(ddir));
 610
 611         iops = bw = 0;
 612         if (ts->runtime[ddir]) {
 613                 uint64_t runt = ts->runtime[ddir];
 614
 615                 bw = ((1000 * ts->io_bytes[ddir]) / runt) / 1024;
 616                 iops = (1000 * (uint64_t) ts->total_io_u[ddir]) / runt;
 617         }
 618
 619         log_info(";%llu;%llu;%llu;%llu",
 620                 (unsigned long long) ts->io_bytes[ddir] >> 10, bw, iops,
 621                                         (unsigned long long) ts->runtime[ddir]);
 622
 623         if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
 624                 log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
 625         else
 626                 log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
 627
 628         if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev))
 629                 log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
 630         else
 631                 log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
 632
 633         if (ts->clat_percentiles) {
 634                 len = calc_clat_percentiles(ts->io_u_plat[ddir],
 635                                         ts->clat_stat[ddir].samples,
 636                                         ts->percentile_list, &ovals, &maxv,
 637                                         &minv);
 638         } else
 639                 len = 0;
 640
 641         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 642                 if (i >= len) {
 643                         log_info(";0%%=0");
 644                         continue;
 645                 }
 646                 log_info(";%f%%=%u", ts->percentile_list[i].u.f, ovals[i]);
 647         }
 648
 649         if (calc_lat(&ts->lat_stat[ddir], &min, &max, &mean, &dev))
 650                 log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
 651         else
 652                 log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
 653
 654         if (ovals)
 655                 free(ovals);
 656
 657         if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
 658                 double p_of_agg = 100.0;
 659
 660                 if (rs->agg[ddir]) {
 661                         p_of_agg = mean * 100 / (double) rs->agg[ddir];
 662                         if (p_of_agg > 100.0)
 663                                 p_of_agg = 100.0;
 664                 }
 665
 666                 log_info(";%lu;%lu;%f%%;%f;%f", min, max, p_of_agg, mean, dev);
 667         } else
 668                 log_info(";%lu;%lu;%f%%;%f;%f", 0UL, 0UL, 0.0, 0.0, 0.0);
 669 }
 670
 671 static void add_ddir_status_json(struct thread_stat *ts,
 672                 struct group_run_stats *rs, int ddir, struct json_object *parent)
 673 {
 674         unsigned long min, max;
 675         unsigned long long bw, iops;
 676         unsigned int *ovals = NULL;
 677         double mean, dev;
 678         unsigned int len, minv, maxv;
 679         int i;
 680         const char *ddirname[] = {"read", "write", "trim"};
 681         struct json_object *dir_object, *tmp_object, *percentile_object;
 682         char buf[120];
 683         double p_of_agg = 100.0;
 684
 685         assert(ddir_rw(ddir));
 686
 687         if (ts->unified_rw_rep && ddir != DDIR_READ)
 688                 return;
 689
 690         dir_object = json_create_object();
 691         json_object_add_value_object(parent,
 692                 ts->unified_rw_rep ? "mixed" : ddirname[ddir], dir_object);
 693
 694         iops = bw = 0;
 695         if (ts->runtime[ddir]) {
 696                 uint64_t runt = ts->runtime[ddir];
 697
 698                 bw = ((1000 * ts->io_bytes[ddir]) / runt) / 1024;
 699                 iops = (1000 * (uint64_t) ts->total_io_u[ddir]) / runt;
 700         }
 701
 702         json_object_add_value_int(dir_object, "io_bytes", ts->io_bytes[ddir] >> 10);
 703         json_object_add_value_int(dir_object, "bw", bw);
 704         json_object_add_value_int(dir_object, "iops", iops);
 705         json_object_add_value_int(dir_object, "runtime", ts->runtime[ddir]);
 706
 707         if (!calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev)) {
 708                 min = max = 0;
 709                 mean = dev = 0.0;
 710         }
 711         tmp_object = json_create_object();
 712         json_object_add_value_object(dir_object, "slat", tmp_object);
 713         json_object_add_value_int(tmp_object, "min", min);
 714         json_object_add_value_int(tmp_object, "max", max);
 715         json_object_add_value_float(tmp_object, "mean", mean);
 716         json_object_add_value_float(tmp_object, "stddev", dev);
 717
 718         if (!calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev)) {
 719                 min = max = 0;
 720                 mean = dev = 0.0;
 721         }
 722         tmp_object = json_create_object();
 723         json_object_add_value_object(dir_object, "clat", tmp_object);
 724         json_object_add_value_int(tmp_object, "min", min);
 725         json_object_add_value_int(tmp_object, "max", max);
 726         json_object_add_value_float(tmp_object, "mean", mean);
 727         json_object_add_value_float(tmp_object, "stddev", dev);
 728
 729         if (ts->clat_percentiles) {
 730                 len = calc_clat_percentiles(ts->io_u_plat[ddir],
 731                                         ts->clat_stat[ddir].samples,
 732                                         ts->percentile_list, &ovals, &maxv,
 733                                         &minv);
 734         } else
 735                 len = 0;
 736
 737         percentile_object = json_create_object();
 738         json_object_add_value_object(tmp_object, "percentile", percentile_object);
 739         for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 740                 if (i >= len) {
 741                         json_object_add_value_int(percentile_object, "0.00", 0);
 742                         continue;
 743                 }
 744                 snprintf(buf, sizeof(buf), "%f", ts->percentile_list[i].u.f);
 745                 json_object_add_value_int(percentile_object, (const char *)buf, ovals[i]);
 746         }
 747
 748         if (!calc_lat(&ts->lat_stat[ddir], &min, &max, &mean, &dev)) {
 749                 min = max = 0;
 750                 mean = dev = 0.0;
 751         }
 752         tmp_object = json_create_object();
 753         json_object_add_value_object(dir_object, "lat", tmp_object);
 754         json_object_add_value_int(tmp_object, "min", min);
 755         json_object_add_value_int(tmp_object, "max", max);
 756         json_object_add_value_float(tmp_object, "mean", mean);
 757         json_object_add_value_float(tmp_object, "stddev", dev);
 758         if (ovals)
 759                 free(ovals);
 760
 761         if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
 762                 if (rs->agg[ddir]) {
 763                         p_of_agg = mean * 100 / (double) rs->agg[ddir];
 764                         if (p_of_agg > 100.0)
 765                                 p_of_agg = 100.0;
 766                 }
 767         } else {
 768                 min = max = 0;
 769                 p_of_agg = mean = dev = 0.0;
 770         }
 771         json_object_add_value_int(dir_object, "bw_min", min);
 772         json_object_add_value_int(dir_object, "bw_max", max);
 773         json_object_add_value_float(dir_object, "bw_agg", p_of_agg);
 774         json_object_add_value_float(dir_object, "bw_mean", mean);
 775         json_object_add_value_float(dir_object, "bw_dev", dev);
 776 }
 777
 778 static void show_thread_status_terse_v2(struct thread_stat *ts,
 779                                         struct group_run_stats *rs)
 780 {
 781         double io_u_dist[FIO_IO_U_MAP_NR];
 782         double io_u_lat_u[FIO_IO_U_LAT_U_NR];
 783         double io_u_lat_m[FIO_IO_U_LAT_M_NR];
 784         double usr_cpu, sys_cpu;
 785         int i;
 786
 787         /* General Info */
 788         log_info("2;%s;%d;%d", ts->name, ts->groupid, ts->error);
 789         /* Log Read Status */
 790         show_ddir_status_terse(ts, rs, DDIR_READ);
 791         /* Log Write Status */
 792         show_ddir_status_terse(ts, rs, DDIR_WRITE);
 793         /* Log Trim Status */
 794         show_ddir_status_terse(ts, rs, DDIR_TRIM);
 795
 796         /* CPU Usage */
 797         if (ts->total_run_time) {
 798                 double runt = (double) ts->total_run_time;
 799
 800                 usr_cpu = (double) ts->usr_time * 100 / runt;
 801                 sys_cpu = (double) ts->sys_time * 100 / runt;
 802         } else {
 803                 usr_cpu = 0;
 804                 sys_cpu = 0;
 805         }
 806
 807         log_info(";%f%%;%f%%;%llu;%llu;%llu", usr_cpu, sys_cpu,
 808                                                 (unsigned long long) ts->ctx,
 809                                                 (unsigned long long) ts->majf,
 810                                                 (unsigned long long) ts->minf);
 811
 812         /* Calc % distribution of IO depths, usecond, msecond latency */
 813         stat_calc_dist(ts->io_u_map, ddir_rw_sum(ts->total_io_u), io_u_dist);
 814         stat_calc_lat_u(ts, io_u_lat_u);
 815         stat_calc_lat_m(ts, io_u_lat_m);
 816
 817         /* Only show fixed 7 I/O depth levels*/
 818         log_info(";%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%",
 819                         io_u_dist[0], io_u_dist[1], io_u_dist[2], io_u_dist[3],
 820                         io_u_dist[4], io_u_dist[5], io_u_dist[6]);
 821
 822         /* Microsecond latency */
 823         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++)
 824                 log_info(";%3.2f%%", io_u_lat_u[i]);
 825         /* Millisecond latency */
 826         for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
 827                 log_info(";%3.2f%%", io_u_lat_m[i]);
 828         /* Additional output if continue_on_error set - default off*/
 829         if (ts->continue_on_error)
 830                 log_info(";%llu;%d", (unsigned long long) ts->total_err_count, ts->first_error);
 831         log_info("\n");
 832
 833         /* Additional output if description is set */
 834         if (ts->description)
 835                 log_info(";%s", ts->description);
 836
 837         log_info("\n");
 838 }
 839
 840 static void show_thread_status_terse_v3_v4(struct thread_stat *ts,
 841                                            struct group_run_stats *rs, int ver)
 842 {
 843         double io_u_dist[FIO_IO_U_MAP_NR];
 844         double io_u_lat_u[FIO_IO_U_LAT_U_NR];
 845         double io_u_lat_m[FIO_IO_U_LAT_M_NR];
 846         double usr_cpu, sys_cpu;
 847         int i;
 848
 849         /* General Info */
 850         log_info("%d;%s;%s;%d;%d", ver, fio_version_string,
 851                                         ts->name, ts->groupid, ts->error);
 852         /* Log Read Status */
 853         show_ddir_status_terse(ts, rs, DDIR_READ);
 854         /* Log Write Status */
 855         show_ddir_status_terse(ts, rs, DDIR_WRITE);
 856         /* Log Trim Status */
 857         if (ver == 4)
 858                 show_ddir_status_terse(ts, rs, DDIR_TRIM);
 859
 860         /* CPU Usage */
 861         if (ts->total_run_time) {
 862                 double runt = (double) ts->total_run_time;
 863
 864                 usr_cpu = (double) ts->usr_time * 100 / runt;
 865                 sys_cpu = (double) ts->sys_time * 100 / runt;
 866         } else {
 867                 usr_cpu = 0;
 868                 sys_cpu = 0;
 869         }
 870
 871         log_info(";%f%%;%f%%;%llu;%llu;%llu", usr_cpu, sys_cpu,
 872                                                 (unsigned long long) ts->ctx,
 873                                                 (unsigned long long) ts->majf,
 874                                                 (unsigned long long) ts->minf);
 875
 876         /* Calc % distribution of IO depths, usecond, msecond latency */
 877         stat_calc_dist(ts->io_u_map, ddir_rw_sum(ts->total_io_u), io_u_dist);
 878         stat_calc_lat_u(ts, io_u_lat_u);
 879         stat_calc_lat_m(ts, io_u_lat_m);
 880
 881         /* Only show fixed 7 I/O depth levels*/
 882         log_info(";%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%",
 883                         io_u_dist[0], io_u_dist[1], io_u_dist[2], io_u_dist[3],
 884                         io_u_dist[4], io_u_dist[5], io_u_dist[6]);
 885
 886         /* Microsecond latency */
 887         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++)
 888                 log_info(";%3.2f%%", io_u_lat_u[i]);
 889         /* Millisecond latency */
 890         for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
 891                 log_info(";%3.2f%%", io_u_lat_m[i]);
 892
 893         /* disk util stats, if any */
 894         if (is_backend)
 895                 show_disk_util(1, NULL);
 896
 897         /* Additional output if continue_on_error set - default off*/
 898         if (ts->continue_on_error)
 899                 log_info(";%llu;%d", (unsigned long long) ts->total_err_count, ts->first_error);
 900
 901         /* Additional output if description is set */
 902         if (strlen(ts->description))
 903                 log_info(";%s", ts->description);
 904
 905         log_info("\n");
 906 }
 907
 908 static struct json_object *show_thread_status_json(struct thread_stat *ts,
 909                                     struct group_run_stats *rs)
 910 {
 911         struct json_object *root, *tmp;
 912         double io_u_dist[FIO_IO_U_MAP_NR];
 913         double io_u_lat_u[FIO_IO_U_LAT_U_NR];
 914         double io_u_lat_m[FIO_IO_U_LAT_M_NR];
 915         double usr_cpu, sys_cpu;
 916         int i;
 917
 918         root = json_create_object();
 919         json_object_add_value_string(root, "jobname", ts->name);
 920         json_object_add_value_int(root, "groupid", ts->groupid);
 921         json_object_add_value_int(root, "error", ts->error);
 922
 923         add_ddir_status_json(ts, rs, DDIR_READ, root);
 924         add_ddir_status_json(ts, rs, DDIR_WRITE, root);
 925         add_ddir_status_json(ts, rs, DDIR_TRIM, root);
 926
 927         /* CPU Usage */
 928         if (ts->total_run_time) {
 929                 double runt = (double) ts->total_run_time;
 930
 931                 usr_cpu = (double) ts->usr_time * 100 / runt;
 932                 sys_cpu = (double) ts->sys_time * 100 / runt;
 933         } else {
 934                 usr_cpu = 0;
 935                 sys_cpu = 0;
 936         }
 937         json_object_add_value_float(root, "usr_cpu", usr_cpu);
 938         json_object_add_value_float(root, "sys_cpu", sys_cpu);
 939         json_object_add_value_int(root, "ctx", ts->ctx);
 940         json_object_add_value_int(root, "majf", ts->majf);
 941         json_object_add_value_int(root, "minf", ts->minf);
 942
 943
 944         /* Calc % distribution of IO depths, usecond, msecond latency */
 945         stat_calc_dist(ts->io_u_map, ddir_rw_sum(ts->total_io_u), io_u_dist);
 946         stat_calc_lat_u(ts, io_u_lat_u);
 947         stat_calc_lat_m(ts, io_u_lat_m);
 948
 949         tmp = json_create_object();
 950         json_object_add_value_object(root, "iodepth_level", tmp);
 951         /* Only show fixed 7 I/O depth levels*/
 952         for (i = 0; i < 7; i++) {
 953                 char name[20];
 954                 if (i < 6)
 955                         snprintf(name, 20, "%d", 1 << i);
 956                 else
 957                         snprintf(name, 20, ">=%d", 1 << i);
 958                 json_object_add_value_float(tmp, (const char *)name, io_u_dist[i]);
 959         }
 960
 961         tmp = json_create_object();
 962         json_object_add_value_object(root, "latency_us", tmp);
 963         /* Microsecond latency */
 964         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++) {
 965                 const char *ranges[] = { "2", "4", "10", "20", "50", "100",
 966                                  "250", "500", "750", "1000", };
 967                 json_object_add_value_float(tmp, ranges[i], io_u_lat_u[i]);
 968         }
 969         /* Millisecond latency */
 970         tmp = json_create_object();
 971         json_object_add_value_object(root, "latency_ms", tmp);
 972         for (i = 0; i < FIO_IO_U_LAT_M_NR; i++) {
 973                 const char *ranges[] = { "2", "4", "10", "20", "50", "100",
 974                                  "250", "500", "750", "1000", "2000",
 975                                  ">=2000", };
 976                 json_object_add_value_float(tmp, ranges[i], io_u_lat_m[i]);
 977         }
 978
 979         /* Additional output if continue_on_error set - default off*/
 980         if (ts->continue_on_error) {
 981                 json_object_add_value_int(root, "total_err", ts->total_err_count);
 982                 json_object_add_value_int(root, "first_error", ts->first_error);
 983         }
 984
 985         if (ts->latency_depth) {
 986                 json_object_add_value_int(root, "latency_depth", ts->latency_depth);
 987                 json_object_add_value_int(root, "latency_target", ts->latency_target);
 988                 json_object_add_value_float(root, "latency_percentile", ts->latency_percentile.u.f);
 989                 json_object_add_value_int(root, "latency_window", ts->latency_window);
 990         }
 991
 992         /* Additional output if description is set */
 993         if (strlen(ts->description))
 994                 json_object_add_value_string(root, "desc", ts->description);
 995
 996         return root;
 997 }
 998
 999 static void show_thread_status_terse(struct thread_stat *ts,
1000                                      struct group_run_stats *rs)
1001 {
1002         if (terse_version == 2)
1003                 show_thread_status_terse_v2(ts, rs);
1004         else if (terse_version == 3 || terse_version == 4)
1005                 show_thread_status_terse_v3_v4(ts, rs, terse_version);
1006         else
1007                 log_err("fio: bad terse version!? %d\n", terse_version);
1008 }
1009
1010 struct json_object *show_thread_status(struct thread_stat *ts,
1011                                        struct group_run_stats *rs)
1012 {
1013         if (output_format == FIO_OUTPUT_TERSE)
1014                 show_thread_status_terse(ts, rs);
1015         else if (output_format == FIO_OUTPUT_JSON)
1016                 return show_thread_status_json(ts, rs);
1017         else
1018                 show_thread_status_normal(ts, rs);
1019         return NULL;
1020 }
1021
1022 static void sum_stat(struct io_stat *dst, struct io_stat *src, int nr)
1023 {
1024         double mean, S;
1025
1026         if (src->samples == 0)
1027                 return;
1028
1029         dst->min_val = min(dst->min_val, src->min_val);
1030         dst->max_val = max(dst->max_val, src->max_val);
1031
1032         /*
1033          * Compute new mean and S after the merge
1034          * <http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
1035          *  #Parallel_algorithm>
1036          */
1037         if (nr == 1) {
1038                 mean = src->mean.u.f;
1039                 S = src->S.u.f;
1040         } else {
1041                 double delta = src->mean.u.f - dst->mean.u.f;
1042
1043                 mean = ((src->mean.u.f * src->samples) +
1044                         (dst->mean.u.f * dst->samples)) /
1045                         (dst->samples + src->samples);
1046
1047                 S =  src->S.u.f + dst->S.u.f + pow(delta, 2.0) *
1048                         (dst->samples * src->samples) /
1049                         (dst->samples + src->samples);
1050         }
1051
1052         dst->samples += src->samples;
1053         dst->mean.u.f = mean;
1054         dst->S.u.f = S;
1055 }
1056
1057 void sum_group_stats(struct group_run_stats *dst, struct group_run_stats *src)
1058 {
1059         int i;
1060
1061         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1062                 if (dst->max_run[i] < src->max_run[i])
1063                         dst->max_run[i] = src->max_run[i];
1064                 if (dst->min_run[i] && dst->min_run[i] > src->min_run[i])
1065                         dst->min_run[i] = src->min_run[i];
1066                 if (dst->max_bw[i] < src->max_bw[i])
1067                         dst->max_bw[i] = src->max_bw[i];
1068                 if (dst->min_bw[i] && dst->min_bw[i] > src->min_bw[i])
1069                         dst->min_bw[i] = src->min_bw[i];
1070
1071                 dst->io_kb[i] += src->io_kb[i];
1072                 dst->agg[i] += src->agg[i];
1073         }
1074
1075 }
1076
1077 void sum_thread_stats(struct thread_stat *dst, struct thread_stat *src, int nr)
1078 {
1079         int l, k;
1080
1081         for (l = 0; l < DDIR_RWDIR_CNT; l++) {
1082                 if (!dst->unified_rw_rep) {
1083                         sum_stat(&dst->clat_stat[l], &src->clat_stat[l], nr);
1084                         sum_stat(&dst->slat_stat[l], &src->slat_stat[l], nr);
1085                         sum_stat(&dst->lat_stat[l], &src->lat_stat[l], nr);
1086                         sum_stat(&dst->bw_stat[l], &src->bw_stat[l], nr);
1087
1088                         dst->io_bytes[l] += src->io_bytes[l];
1089
1090                         if (dst->runtime[l] < src->runtime[l])
1091                                 dst->runtime[l] = src->runtime[l];
1092                 } else {
1093                         sum_stat(&dst->clat_stat[0], &src->clat_stat[l], nr);
1094                         sum_stat(&dst->slat_stat[0], &src->slat_stat[l], nr);
1095                         sum_stat(&dst->lat_stat[0], &src->lat_stat[l], nr);
1096                         sum_stat(&dst->bw_stat[0], &src->bw_stat[l], nr);
1097
1098                         dst->io_bytes[0] += src->io_bytes[l];
1099
1100                         if (dst->runtime[0] < src->runtime[l])
1101                                 dst->runtime[0] = src->runtime[l];
1102                 }
1103         }
1104
1105         dst->usr_time += src->usr_time;
1106         dst->sys_time += src->sys_time;
1107         dst->ctx += src->ctx;
1108         dst->majf += src->majf;
1109         dst->minf += src->minf;
1110
1111         for (k = 0; k < FIO_IO_U_MAP_NR; k++)
1112                 dst->io_u_map[k] += src->io_u_map[k];
1113         for (k = 0; k < FIO_IO_U_MAP_NR; k++)
1114                 dst->io_u_submit[k] += src->io_u_submit[k];
1115         for (k = 0; k < FIO_IO_U_MAP_NR; k++)
1116                 dst->io_u_complete[k] += src->io_u_complete[k];
1117         for (k = 0; k < FIO_IO_U_LAT_U_NR; k++)
1118                 dst->io_u_lat_u[k] += src->io_u_lat_u[k];
1119         for (k = 0; k < FIO_IO_U_LAT_M_NR; k++)
1120                 dst->io_u_lat_m[k] += src->io_u_lat_m[k];
1121
1122         for (k = 0; k < DDIR_RWDIR_CNT; k++) {
1123                 if (!dst->unified_rw_rep) {
1124                         dst->total_io_u[k] += src->total_io_u[k];
1125                         dst->short_io_u[k] += src->short_io_u[k];
1126                 } else {
1127                         dst->total_io_u[0] += src->total_io_u[k];
1128                         dst->short_io_u[0] += src->short_io_u[k];
1129                 }
1130         }
1131
1132         for (k = 0; k < DDIR_RWDIR_CNT; k++) {
1133                 int m;
1134
1135                 for (m = 0; m < FIO_IO_U_PLAT_NR; m++) {
1136                         if (!dst->unified_rw_rep)
1137                                 dst->io_u_plat[k][m] += src->io_u_plat[k][m];
1138                         else
1139                                 dst->io_u_plat[0][m] += src->io_u_plat[k][m];
1140                 }
1141         }
1142
1143         dst->total_run_time += src->total_run_time;
1144         dst->total_submit += src->total_submit;
1145         dst->total_complete += src->total_complete;
1146 }
1147
1148 void init_group_run_stat(struct group_run_stats *gs)
1149 {
1150         int i;
1151         memset(gs, 0, sizeof(*gs));
1152
1153         for (i = 0; i < DDIR_RWDIR_CNT; i++)
1154                 gs->min_bw[i] = gs->min_run[i] = ~0UL;
1155 }
1156
1157 void init_thread_stat(struct thread_stat *ts)
1158 {
1159         int j;
1160
1161         memset(ts, 0, sizeof(*ts));
1162
1163         for (j = 0; j < DDIR_RWDIR_CNT; j++) {
1164                 ts->lat_stat[j].min_val = -1UL;
1165                 ts->clat_stat[j].min_val = -1UL;
1166                 ts->slat_stat[j].min_val = -1UL;
1167                 ts->bw_stat[j].min_val = -1UL;
1168         }
1169         ts->groupid = -1;
1170 }
1171
1172 static void __show_run_stats(void)
1173 {
1174         struct group_run_stats *runstats, *rs;
1175         struct thread_data *td;
1176         struct thread_stat *threadstats, *ts;
1177         int i, j, nr_ts, last_ts, idx;
1178         int kb_base_warned = 0;
1179         int unit_base_warned = 0;
1180         struct json_object *root = NULL;
1181         struct json_array *array = NULL;
1182
1183         runstats = malloc(sizeof(struct group_run_stats) * (groupid + 1));
1184
1185         for (i = 0; i < groupid + 1; i++)
1186                 init_group_run_stat(&runstats[i]);
1187
1188         /*
1189          * find out how many threads stats we need. if group reporting isn't
1190          * enabled, it's one-per-td.
1191          */
1192         nr_ts = 0;
1193         last_ts = -1;
1194         for_each_td(td, i) {
1195                 if (!td->o.group_reporting) {
1196                         nr_ts++;
1197                         continue;
1198                 }
1199                 if (last_ts == td->groupid)
1200                         continue;
1201
1202                 last_ts = td->groupid;
1203                 nr_ts++;
1204         }
1205
1206         threadstats = malloc(nr_ts * sizeof(struct thread_stat));
1207
1208         for (i = 0; i < nr_ts; i++)
1209                 init_thread_stat(&threadstats[i]);
1210
1211         j = 0;
1212         last_ts = -1;
1213         idx = 0;
1214         for_each_td(td, i) {
1215                 if (idx && (!td->o.group_reporting ||
1216                     (td->o.group_reporting && last_ts != td->groupid))) {
1217                         idx = 0;
1218                         j++;
1219                 }
1220
1221                 last_ts = td->groupid;
1222
1223                 ts = &threadstats[j];
1224
1225                 ts->clat_percentiles = td->o.clat_percentiles;
1226                 ts->percentile_precision = td->o.percentile_precision;
1227                 memcpy(ts->percentile_list, td->o.percentile_list, sizeof(td->o.percentile_list));
1228
1229                 idx++;
1230                 ts->members++;
1231
1232                 if (ts->groupid == -1) {
1233                         /*
1234                          * These are per-group shared already
1235                          */
1236                         strncpy(ts->name, td->o.name, FIO_JOBNAME_SIZE - 1);
1237                         if (td->o.description)
1238                                 strncpy(ts->description, td->o.description,
1239                                                 FIO_JOBDESC_SIZE - 1);
1240                         else
1241                                 memset(ts->description, 0, FIO_JOBDESC_SIZE);
1242
1243                         /*
1244                          * If multiple entries in this group, this is
1245                          * the first member.
1246                          */
1247                         ts->thread_number = td->thread_number;
1248                         ts->groupid = td->groupid;
1249
1250                         /*
1251                          * first pid in group, not very useful...
1252                          */
1253                         ts->pid = td->pid;
1254
1255                         ts->kb_base = td->o.kb_base;
1256                         ts->unit_base = td->o.unit_base;
1257                         ts->unified_rw_rep = td->o.unified_rw_rep;
1258                 } else if (ts->kb_base != td->o.kb_base && !kb_base_warned) {
1259                         log_info("fio: kb_base differs for jobs in group, using"
1260                                  " %u as the base\n", ts->kb_base);
1261                         kb_base_warned = 1;
1262                 } else if (ts->unit_base != td->o.unit_base && !unit_base_warned) {
1263                         log_info("fio: unit_base differs for jobs in group, using"
1264                                  " %u as the base\n", ts->unit_base);
1265                         unit_base_warned = 1;
1266                 }
1267
1268                 ts->continue_on_error = td->o.continue_on_error;
1269                 ts->total_err_count += td->total_err_count;
1270                 ts->first_error = td->first_error;
1271                 if (!ts->error) {
1272                         if (!td->error && td->o.continue_on_error &&
1273                             td->first_error) {
1274                                 ts->error = td->first_error;
1275                                 strcpy(ts->verror, td->verror);
1276                         } else  if (td->error) {
1277                                 ts->error = td->error;
1278                                 strcpy(ts->verror, td->verror);
1279                         }
1280                 }
1281
1282                 ts->latency_depth = td->latency_qd;
1283                 ts->latency_target = td->o.latency_target;
1284                 ts->latency_percentile = td->o.latency_percentile;
1285                 ts->latency_window = td->o.latency_window;
1286
1287                 sum_thread_stats(ts, &td->ts, idx);
1288         }
1289
1290         for (i = 0; i < nr_ts; i++) {
1291                 unsigned long long bw;
1292
1293                 ts = &threadstats[i];
1294                 rs = &runstats[ts->groupid];
1295                 rs->kb_base = ts->kb_base;
1296                 rs->unit_base = ts->unit_base;
1297                 rs->unified_rw_rep += ts->unified_rw_rep;
1298
1299                 for (j = 0; j < DDIR_RWDIR_CNT; j++) {
1300                         if (!ts->runtime[j])
1301                                 continue;
1302                         if (ts->runtime[j] < rs->min_run[j] || !rs->min_run[j])
1303                                 rs->min_run[j] = ts->runtime[j];
1304                         if (ts->runtime[j] > rs->max_run[j])
1305                                 rs->max_run[j] = ts->runtime[j];
1306
1307                         bw = 0;
1308                         if (ts->runtime[j]) {
1309                                 unsigned long runt = ts->runtime[j];
1310                                 unsigned long long kb;
1311
1312                                 kb = ts->io_bytes[j] / rs->kb_base;
1313                                 bw = kb * 1000 / runt;
1314                         }
1315                         if (bw < rs->min_bw[j])
1316                                 rs->min_bw[j] = bw;
1317                         if (bw > rs->max_bw[j])
1318                                 rs->max_bw[j] = bw;
1319
1320                         rs->io_kb[j] += ts->io_bytes[j] / rs->kb_base;
1321                 }
1322         }
1323
1324         for (i = 0; i < groupid + 1; i++) {
1325                 int ddir;
1326
1327                 rs = &runstats[i];
1328
1329                 for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
1330                         if (rs->max_run[ddir])
1331                                 rs->agg[ddir] = (rs->io_kb[ddir] * 1000) /
1332                                                 rs->max_run[ddir];
1333                 }
1334         }
1335
1336         /*
1337          * don't overwrite last signal output
1338          */
1339         if (output_format == FIO_OUTPUT_NORMAL)
1340                 log_info("\n");
1341         else if (output_format == FIO_OUTPUT_JSON) {
1342                 root = json_create_object();
1343                 json_object_add_value_string(root, "fio version", fio_version_string);
1344                 array = json_create_array();
1345                 json_object_add_value_array(root, "jobs", array);
1346         }
1347
1348         for (i = 0; i < nr_ts; i++) {
1349                 ts = &threadstats[i];
1350                 rs = &runstats[ts->groupid];
1351
1352                 if (is_backend)
1353                         fio_server_send_ts(ts, rs);
1354                 else if (output_format == FIO_OUTPUT_TERSE)
1355                         show_thread_status_terse(ts, rs);
1356                 else if (output_format == FIO_OUTPUT_JSON) {
1357                         struct json_object *tmp = show_thread_status_json(ts, rs);
1358                         json_array_add_value_object(array, tmp);
1359                 } else
1360                         show_thread_status_normal(ts, rs);
1361         }
1362         if (output_format == FIO_OUTPUT_JSON) {
1363                 /* disk util stats, if any */
1364                 show_disk_util(1, root);
1365
1366                 show_idle_prof_stats(FIO_OUTPUT_JSON, root);
1367
1368                 json_print_object(root);
1369                 log_info("\n");
1370                 json_free_object(root);
1371         }
1372
1373         for (i = 0; i < groupid + 1; i++) {
1374                 rs = &runstats[i];
1375
1376                 rs->groupid = i;
1377                 if (is_backend)
1378                         fio_server_send_gs(rs);
1379                 else if (output_format == FIO_OUTPUT_NORMAL)
1380                         show_group_stats(rs);
1381         }
1382
1383         if (is_backend)
1384                 fio_server_send_du();
1385         else if (output_format == FIO_OUTPUT_NORMAL) {
1386                 show_disk_util(0, NULL);
1387                 show_idle_prof_stats(FIO_OUTPUT_NORMAL, NULL);
1388         }
1389
1390         if ( !(output_format == FIO_OUTPUT_TERSE) && append_terse_output) {
1391                 log_info("\nAdditional Terse Output:\n");
1392
1393                 for (i = 0; i < nr_ts; i++) {
1394                         ts = &threadstats[i];
1395                         rs = &runstats[ts->groupid];
1396                         show_thread_status_terse(ts, rs);
1397                 }
1398         }
1399
1400         log_info_flush();
1401         free(runstats);
1402         free(threadstats);
1403 }
1404
1405 void show_run_stats(void)
1406 {
1407         fio_mutex_down(stat_mutex);
1408         __show_run_stats();
1409         fio_mutex_up(stat_mutex);
1410 }
1411
1412 static void *__show_running_run_stats(void fio_unused *arg)
1413 {
1414         struct thread_data *td;
1415         unsigned long long *rt;
1416         struct timeval tv;
1417         int i;
1418
1419         rt = malloc(thread_number * sizeof(unsigned long long));
1420         fio_gettime(&tv, NULL);
1421
1422         for_each_td(td, i) {
1423                 rt[i] = mtime_since(&td->start, &tv);
1424                 if (td_read(td) && td->io_bytes[DDIR_READ])
1425                         td->ts.runtime[DDIR_READ] += rt[i];
1426                 if (td_write(td) && td->io_bytes[DDIR_WRITE])
1427                         td->ts.runtime[DDIR_WRITE] += rt[i];
1428                 if (td_trim(td) && td->io_bytes[DDIR_TRIM])
1429                         td->ts.runtime[DDIR_TRIM] += rt[i];
1430
1431                 td->update_rusage = 1;
1432                 td->ts.io_bytes[DDIR_READ] = td->io_bytes[DDIR_READ];
1433                 td->ts.io_bytes[DDIR_WRITE] = td->io_bytes[DDIR_WRITE];
1434                 td->ts.io_bytes[DDIR_TRIM] = td->io_bytes[DDIR_TRIM];
1435                 td->ts.total_run_time = mtime_since(&td->epoch, &tv);
1436         }
1437
1438         for_each_td(td, i) {
1439                 if (td->rusage_sem) {
1440                         td->update_rusage = 1;
1441                         fio_mutex_down(td->rusage_sem);
1442                 }
1443                 td->update_rusage = 0;
1444         }
1445
1446         __show_run_stats();
1447
1448         for_each_td(td, i) {
1449                 if (td_read(td) && td->io_bytes[DDIR_READ])
1450                         td->ts.runtime[DDIR_READ] -= rt[i];
1451                 if (td_write(td) && td->io_bytes[DDIR_WRITE])
1452                         td->ts.runtime[DDIR_WRITE] -= rt[i];
1453                 if (td_trim(td) && td->io_bytes[DDIR_TRIM])
1454                         td->ts.runtime[DDIR_TRIM] -= rt[i];
1455         }
1456
1457         free(rt);
1458         fio_mutex_up(stat_mutex);
1459         return NULL;
1460 }
1461
1462 /*
1463  * Called from signal handler. It _should_ be safe to just run this inline
1464  * in the sig handler, but we should be disturbing the system less by just
1465  * creating a thread to do it.
1466  */
1467 void show_running_run_stats(void)
1468 {
1469         pthread_t thread;
1470
1471         fio_mutex_down(stat_mutex);
1472
1473         if (!pthread_create(&thread, NULL, __show_running_run_stats, NULL)) {
1474                 pthread_detach(thread);
1475                 return;
1476         }
1477
1478         fio_mutex_up(stat_mutex);
1479 }
1480
1481 static int status_interval_init;
1482 static struct timeval status_time;
1483 static int status_file_disabled;
1484
1485 #define FIO_STATUS_FILE         "fio-dump-status"
1486
1487 static int check_status_file(void)
1488 {
1489         struct stat sb;
1490         const char *temp_dir;
1491         char fio_status_file_path[PATH_MAX];
1492
1493         if (status_file_disabled)
1494                 return 0;
1495
1496         temp_dir = getenv("TMPDIR");
1497         if (temp_dir == NULL)
1498                 temp_dir = getenv("TEMP");
1499         if (temp_dir == NULL)
1500                 temp_dir = "/tmp";
1501
1502         snprintf(fio_status_file_path, sizeof(fio_status_file_path), "%s/%s", temp_dir, FIO_STATUS_FILE);
1503
1504         if (stat(fio_status_file_path, &sb))
1505                 return 0;
1506
1507         if (unlink(fio_status_file_path) < 0) {
1508                 log_err("fio: failed to unlink %s: %s\n", fio_status_file_path,
1509                                                         strerror(errno));
1510                 log_err("fio: disabling status file updates\n");
1511                 status_file_disabled = 1;
1512         }
1513
1514         return 1;
1515 }
1516
1517 void check_for_running_stats(void)
1518 {
1519         if (status_interval) {
1520                 if (!status_interval_init) {
1521                         fio_gettime(&status_time, NULL);
1522                         status_interval_init = 1;
1523                 } else if (mtime_since_now(&status_time) >= status_interval) {
1524                         show_running_run_stats();
1525                         fio_gettime(&status_time, NULL);
1526                         return;
1527                 }
1528         }
1529         if (check_status_file()) {
1530                 show_running_run_stats();
1531                 return;
1532         }
1533 }
1534
1535 static inline void add_stat_sample(struct io_stat *is, unsigned long data)
1536 {
1537         double val = data;
1538         double delta;
1539
1540         if (data > is->max_val)
1541                 is->max_val = data;
1542         if (data < is->min_val)
1543                 is->min_val = data;
1544
1545         delta = val - is->mean.u.f;
1546         if (delta) {
1547                 is->mean.u.f += delta / (is->samples + 1.0);
1548                 is->S.u.f += delta * (val - is->mean.u.f);
1549         }
1550
1551         is->samples++;
1552 }
1553
1554 static void __add_log_sample(struct io_log *iolog, unsigned long val,
1555                              enum fio_ddir ddir, unsigned int bs,
1556                              unsigned long t)
1557 {
1558         const int nr_samples = iolog->nr_samples;
1559
1560         if (iolog->disabled)
1561                 return;
1562
1563         if (!iolog->nr_samples)
1564                 iolog->avg_last = t;
1565
1566         if (iolog->nr_samples == iolog->max_samples) {
1567                 int new_size = sizeof(struct io_sample) * iolog->max_samples*2;
1568                 void *new_log;
1569
1570                 new_log = realloc(iolog->log, new_size);
1571                 if (!new_log) {
1572                         log_err("fio: failed extending iolog! Will stop logging.\n");
1573                         iolog->disabled = 1;
1574                         return;
1575                 }
1576                 iolog->log = new_log;
1577                 iolog->max_samples <<= 1;
1578         }
1579
1580         iolog->log[nr_samples].val = val;
1581         iolog->log[nr_samples].time = t;
1582         iolog->log[nr_samples].ddir = ddir;
1583         iolog->log[nr_samples].bs = bs;
1584         iolog->nr_samples++;
1585 }
1586
1587 static inline void reset_io_stat(struct io_stat *ios)
1588 {
1589         ios->max_val = ios->min_val = ios->samples = 0;
1590         ios->mean.u.f = ios->S.u.f = 0;
1591 }
1592
1593 void reset_io_stats(struct thread_data *td)
1594 {
1595         struct thread_stat *ts = &td->ts;
1596         int i, j;
1597
1598         for (i = 0; i < DDIR_RWDIR_CNT; i++) {
1599                 reset_io_stat(&ts->clat_stat[i]);
1600                 reset_io_stat(&ts->slat_stat[i]);
1601                 reset_io_stat(&ts->lat_stat[i]);
1602                 reset_io_stat(&ts->bw_stat[i]);
1603                 reset_io_stat(&ts->iops_stat[i]);
1604
1605                 ts->io_bytes[i] = 0;
1606                 ts->runtime[i] = 0;
1607
1608                 for (j = 0; j < FIO_IO_U_PLAT_NR; j++)
1609                         ts->io_u_plat[i][j] = 0;
1610         }
1611
1612         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
1613                 ts->io_u_map[i] = 0;
1614                 ts->io_u_submit[i] = 0;
1615                 ts->io_u_complete[i] = 0;
1616                 ts->io_u_lat_u[i] = 0;
1617                 ts->io_u_lat_m[i] = 0;
1618                 ts->total_submit = 0;
1619                 ts->total_complete = 0;
1620         }
1621
1622         for (i = 0; i < 3; i++) {
1623                 ts->total_io_u[i] = 0;
1624                 ts->short_io_u[i] = 0;
1625         }
1626 }
1627
1628 static void _add_stat_to_log(struct io_log *iolog, unsigned long elapsed)
1629 {
1630         /*
1631          * Note an entry in the log. Use the mean from the logged samples,
1632          * making sure to properly round up. Only write a log entry if we
1633          * had actual samples done.
1634          */
1635         if (iolog->avg_window[DDIR_READ].samples) {
1636                 unsigned long mr;
1637
1638                 mr = iolog->avg_window[DDIR_READ].mean.u.f + 0.50;
1639                 __add_log_sample(iolog, mr, DDIR_READ, 0, elapsed);
1640         }
1641         if (iolog->avg_window[DDIR_WRITE].samples) {
1642                 unsigned long mw;
1643
1644                 mw = iolog->avg_window[DDIR_WRITE].mean.u.f + 0.50;
1645                 __add_log_sample(iolog, mw, DDIR_WRITE, 0, elapsed);
1646         }
1647         if (iolog->avg_window[DDIR_TRIM].samples) {
1648                 unsigned long mw;
1649
1650                 mw = iolog->avg_window[DDIR_TRIM].mean.u.f + 0.50;
1651                 __add_log_sample(iolog, mw, DDIR_TRIM, 0, elapsed);
1652         }
1653
1654         reset_io_stat(&iolog->avg_window[DDIR_READ]);
1655         reset_io_stat(&iolog->avg_window[DDIR_WRITE]);
1656         reset_io_stat(&iolog->avg_window[DDIR_TRIM]);
1657 }
1658
1659 static void add_log_sample(struct thread_data *td, struct io_log *iolog,
1660                            unsigned long val, enum fio_ddir ddir,
1661                            unsigned int bs)
1662 {
1663         unsigned long elapsed, this_window;
1664
1665         if (!ddir_rw(ddir))
1666                 return;
1667
1668         elapsed = mtime_since_now(&td->epoch);
1669
1670         /*
1671          * If no time averaging, just add the log sample.
1672          */
1673         if (!iolog->avg_msec) {
1674                 __add_log_sample(iolog, val, ddir, bs, elapsed);
1675                 return;
1676         }
1677
1678         /*
1679          * Add the sample. If the time period has passed, then
1680          * add that entry to the log and clear.
1681          */
1682         add_stat_sample(&iolog->avg_window[ddir], val);
1683
1684         /*
1685          * If period hasn't passed, adding the above sample is all we
1686          * need to do.
1687          */
1688         this_window = elapsed - iolog->avg_last;
1689         if (this_window < iolog->avg_msec)
1690                 return;
1691
1692         _add_stat_to_log(iolog, elapsed);
1693
1694         iolog->avg_last = elapsed;
1695 }
1696
1697 void finalize_logs(struct thread_data *td)
1698 {
1699         unsigned long elapsed;
1700
1701         elapsed = mtime_since_now(&td->epoch);
1702
1703         if (td->clat_log)
1704                 _add_stat_to_log(td->clat_log, elapsed);
1705         if (td->slat_log)
1706                 _add_stat_to_log(td->slat_log, elapsed);
1707         if (td->lat_log)
1708                 _add_stat_to_log(td->lat_log, elapsed);
1709         if (td->bw_log)
1710                 _add_stat_to_log(td->bw_log, elapsed);
1711         if (td->iops_log)
1712                 _add_stat_to_log(td->iops_log, elapsed);
1713 }
1714
1715 void add_agg_sample(unsigned long val, enum fio_ddir ddir, unsigned int bs)
1716 {
1717         struct io_log *iolog;
1718
1719         if (!ddir_rw(ddir))
1720                 return;
1721
1722         iolog = agg_io_log[ddir];
1723         __add_log_sample(iolog, val, ddir, bs, mtime_since_genesis());
1724 }
1725
1726 static void add_clat_percentile_sample(struct thread_stat *ts,
1727                                 unsigned long usec, enum fio_ddir ddir)
1728 {
1729         unsigned int idx = plat_val_to_idx(usec);
1730         assert(idx < FIO_IO_U_PLAT_NR);
1731
1732         ts->io_u_plat[ddir][idx]++;
1733 }
1734
1735 void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
1736                      unsigned long usec, unsigned int bs)
1737 {
1738         struct thread_stat *ts = &td->ts;
1739
1740         if (!ddir_rw(ddir))
1741                 return;
1742
1743         add_stat_sample(&ts->clat_stat[ddir], usec);
1744
1745         if (td->clat_log)
1746                 add_log_sample(td, td->clat_log, usec, ddir, bs);
1747
1748         if (ts->clat_percentiles)
1749                 add_clat_percentile_sample(ts, usec, ddir);
1750 }
1751
1752 void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
1753                      unsigned long usec, unsigned int bs)
1754 {
1755         struct thread_stat *ts = &td->ts;
1756
1757         if (!ddir_rw(ddir))
1758                 return;
1759
1760         add_stat_sample(&ts->slat_stat[ddir], usec);
1761
1762         if (td->slat_log)
1763                 add_log_sample(td, td->slat_log, usec, ddir, bs);
1764 }
1765
1766 void add_lat_sample(struct thread_data *td, enum fio_ddir ddir,
1767                     unsigned long usec, unsigned int bs)
1768 {
1769         struct thread_stat *ts = &td->ts;
1770
1771         if (!ddir_rw(ddir))
1772                 return;
1773
1774         add_stat_sample(&ts->lat_stat[ddir], usec);
1775
1776         if (td->lat_log)
1777                 add_log_sample(td, td->lat_log, usec, ddir, bs);
1778 }
1779
1780 void add_bw_sample(struct thread_data *td, enum fio_ddir ddir, unsigned int bs,
1781                    struct timeval *t)
1782 {
1783         struct thread_stat *ts = &td->ts;
1784         unsigned long spent, rate;
1785
1786         if (!ddir_rw(ddir))
1787                 return;
1788
1789         spent = mtime_since(&td->bw_sample_time, t);
1790         if (spent < td->o.bw_avg_time)
1791                 return;
1792
1793         /*
1794          * Compute both read and write rates for the interval.
1795          */
1796         for (ddir = DDIR_READ; ddir < DDIR_RWDIR_CNT; ddir++) {
1797                 uint64_t delta;
1798
1799                 delta = td->this_io_bytes[ddir] - td->stat_io_bytes[ddir];
1800                 if (!delta)
1801                         continue; /* No entries for interval */
1802
1803                 rate = delta * 1000 / spent / 1024;
1804                 add_stat_sample(&ts->bw_stat[ddir], rate);
1805
1806                 if (td->bw_log)
1807                         add_log_sample(td, td->bw_log, rate, ddir, bs);
1808
1809                 td->stat_io_bytes[ddir] = td->this_io_bytes[ddir];
1810         }
1811
1812         fio_gettime(&td->bw_sample_time, NULL);
1813 }
1814
1815 void add_iops_sample(struct thread_data *td, enum fio_ddir ddir, unsigned int bs,
1816                      struct timeval *t)
1817 {
1818         struct thread_stat *ts = &td->ts;
1819         unsigned long spent, iops;
1820
1821         if (!ddir_rw(ddir))
1822                 return;
1823
1824         spent = mtime_since(&td->iops_sample_time, t);
1825         if (spent < td->o.iops_avg_time)
1826                 return;
1827
1828         /*
1829          * Compute both read and write rates for the interval.
1830          */
1831         for (ddir = DDIR_READ; ddir < DDIR_RWDIR_CNT; ddir++) {
1832                 uint64_t delta;
1833
1834                 delta = td->this_io_blocks[ddir] - td->stat_io_blocks[ddir];
1835                 if (!delta)
1836                         continue; /* No entries for interval */
1837
1838                 iops = (delta * 1000) / spent;
1839                 add_stat_sample(&ts->iops_stat[ddir], iops);
1840
1841                 if (td->iops_log)
1842                         add_log_sample(td, td->iops_log, iops, ddir, bs);
1843
1844                 td->stat_io_blocks[ddir] = td->this_io_blocks[ddir];
1845         }
1846
1847         fio_gettime(&td->iops_sample_time, NULL);
1848 }
1849
1850 void stat_init(void)
1851 {
1852         stat_mutex = fio_mutex_init(FIO_MUTEX_UNLOCKED);
1853 }
1854
1855 void stat_exit(void)
1856 {
1857         /*
1858          * When we have the mutex, we know out-of-band access to it
1859          * have ended.
1860          */
1861         fio_mutex_down(stat_mutex);
1862         fio_mutex_remove(stat_mutex);
1863 }