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 /*
  13  * Cheesy number->string conversion, complete with carry rounding error.
  14  */
  15 static char *num2str(unsigned long num, int maxlen, int base, int pow2)
  16 {
  17         char postfix[] = { ' ', 'K', 'M', 'G', 'P', 'E' };
  18         unsigned int thousand;
  19         char *buf;
  20         int i;
  21
  22         if (pow2)
  23                 thousand = 1024;
  24         else
  25                 thousand = 1000;
  26
  27         buf = malloc(128);
  28
  29         for (i = 0; base > 1; i++)
  30                 base /= thousand;
  31
  32         do {
  33                 int len, carry = 0;
  34
  35                 len = sprintf(buf, "%'lu", num);
  36                 if (len <= maxlen) {
  37                         if (i >= 1) {
  38                                 buf[len] = postfix[i];
  39                                 buf[len + 1] = '\0';
  40                         }
  41                         return buf;
  42                 }
  43
  44                 if ((num % thousand) >= (thousand / 2))
  45                         carry = 1;
  46
  47                 num /= thousand;
  48                 num += carry;
  49                 i++;
  50         } while (i <= 5);
  51
  52         return buf;
  53 }
  54
  55 void update_rusage_stat(struct thread_data *td)
  56 {
  57         struct thread_stat *ts = &td->ts;
  58
  59         getrusage(RUSAGE_SELF, &ts->ru_end);
  60
  61         ts->usr_time += mtime_since(&ts->ru_start.ru_utime,
  62                                         &ts->ru_end.ru_utime);
  63         ts->sys_time += mtime_since(&ts->ru_start.ru_stime,
  64                                         &ts->ru_end.ru_stime);
  65         ts->ctx += ts->ru_end.ru_nvcsw + ts->ru_end.ru_nivcsw
  66                         - (ts->ru_start.ru_nvcsw + ts->ru_start.ru_nivcsw);
  67         ts->minf += ts->ru_end.ru_minflt - ts->ru_start.ru_minflt;
  68         ts->majf += ts->ru_end.ru_majflt - ts->ru_start.ru_majflt;
  69
  70         memcpy(&ts->ru_start, &ts->ru_end, sizeof(ts->ru_end));
  71 }
  72
  73 static int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max,
  74                     double *mean, double *dev)
  75 {
  76         double n = is->samples;
  77
  78         if (is->samples == 0)
  79                 return 0;
  80
  81         *min = is->min_val;
  82         *max = is->max_val;
  83
  84         n = (double) is->samples;
  85         *mean = is->mean;
  86
  87         if (n > 1.0)
  88                 *dev = sqrt(is->S / (n - 1.0));
  89         else
  90                 *dev = 0;
  91
  92         return 1;
  93 }
  94
  95 static void show_group_stats(struct group_run_stats *rs, int id)
  96 {
  97         char *p1, *p2, *p3, *p4;
  98         const char *ddir_str[] = { "   READ", "  WRITE" };
  99         int i;
 100
 101         log_info("\nRun status group %d (all jobs):\n", id);
 102
 103         for (i = 0; i <= DDIR_WRITE; i++) {
 104                 if (!rs->max_run[i])
 105                         continue;
 106
 107                 p1 = num2str(rs->io_kb[i], 6, 1024, 1);
 108                 p2 = num2str(rs->agg[i], 6, 1024, 1);
 109                 p3 = num2str(rs->min_bw[i], 6, 1024, 1);
 110                 p4 = num2str(rs->max_bw[i], 6, 1024, 1);
 111
 112                 log_info("%s: io=%siB, aggrb=%siB/s, minb=%siB/s, maxb=%siB/s,"
 113                          " mint=%llumsec, maxt=%llumsec\n", ddir_str[i], p1, p2,
 114                                                 p3, p4, rs->min_run[i],
 115                                                 rs->max_run[i]);
 116
 117                 free(p1);
 118                 free(p2);
 119                 free(p3);
 120                 free(p4);
 121         }
 122 }
 123
 124 #define ts_total_io_u(ts)       \
 125         ((ts)->total_io_u[0] + (ts)->total_io_u[1])
 126
 127 static void stat_calc_dist(unsigned int *map, unsigned long total,
 128                            double *io_u_dist)
 129 {
 130         int i;
 131
 132         /*
 133          * Do depth distribution calculations
 134          */
 135         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 136                 if (total) {
 137                         io_u_dist[i] = (double) map[i] / (double) total;
 138                         io_u_dist[i] *= 100.0;
 139                         if (io_u_dist[i] < 0.1 && map[i])
 140                                 io_u_dist[i] = 0.1;
 141                 } else
 142                         io_u_dist[i] = 0.0;
 143         }
 144 }
 145
 146 static void stat_calc_lat(struct thread_stat *ts, double *dst,
 147                           unsigned int *src, int nr)
 148 {
 149         unsigned long total = ts_total_io_u(ts);
 150         int i;
 151
 152         /*
 153          * Do latency distribution calculations
 154          */
 155         for (i = 0; i < nr; i++) {
 156                 if (total) {
 157                         dst[i] = (double) src[i] / (double) total;
 158                         dst[i] *= 100.0;
 159                         if (dst[i] < 0.01 && src[i])
 160                                 dst[i] = 0.01;
 161                 } else
 162                         dst[i] = 0.0;
 163         }
 164 }
 165
 166 static void stat_calc_lat_u(struct thread_stat *ts, double *io_u_lat)
 167 {
 168         stat_calc_lat(ts, io_u_lat, ts->io_u_lat_u, FIO_IO_U_LAT_U_NR);
 169 }
 170
 171 static void stat_calc_lat_m(struct thread_stat *ts, double *io_u_lat)
 172 {
 173         stat_calc_lat(ts, io_u_lat, ts->io_u_lat_m, FIO_IO_U_LAT_M_NR);
 174 }
 175
 176 static int usec_to_msec(unsigned long *min, unsigned long *max, double *mean,
 177                         double *dev)
 178 {
 179         if (*min > 1000 && *max > 1000 && *mean > 1000.0 && *dev > 1000.0) {
 180                 *min /= 1000;
 181                 *max /= 1000;
 182                 *mean /= 1000.0;
 183                 *dev /= 1000.0;
 184                 return 0;
 185         }
 186
 187         return 1;
 188 }
 189
 190 static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
 191                              int ddir)
 192 {
 193         const char *ddir_str[] = { "read ", "write" };
 194         unsigned long min, max, runt;
 195         unsigned long long bw, iops;
 196         double mean, dev;
 197         char *io_p, *bw_p, *iops_p;
 198
 199         if (!ts->runtime[ddir])
 200                 return;
 201
 202         runt = ts->runtime[ddir];
 203
 204         bw = (1000 * ts->io_bytes[ddir]) / runt;
 205         io_p = num2str(ts->io_bytes[ddir] >> 10, 6, 1024, 1);
 206         bw_p = num2str(bw >> 10, 6, 1024, 1);
 207
 208         iops = (1000 * ts->total_io_u[ddir]) / runt;
 209         iops_p = num2str(iops, 6, 1, 0);
 210
 211         log_info("  %s: io=%siB, bw=%siB/s, iops=%s, runt=%6lumsec\n",
 212                                         ddir_str[ddir], io_p, bw_p, iops_p,
 213                                         ts->runtime[ddir]);
 214
 215         free(io_p);
 216         free(bw_p);
 217         free(iops_p);
 218
 219         if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev)) {
 220                 const char *base = "(usec)";
 221                 char *minp, *maxp;
 222
 223                 if (!usec_to_msec(&min, &max, &mean, &dev))
 224                         base = "(msec)";
 225
 226                 minp = num2str(min, 6, 1, 0);
 227                 maxp = num2str(max, 6, 1, 0);
 228
 229                 log_info("    slat %s: min=%s, max=%s, avg=%5.02f,"
 230                          " stdev=%5.02f\n", base, minp, maxp, mean, dev);
 231
 232                 free(minp);
 233                 free(maxp);
 234         }
 235         if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev)) {
 236                 const char *base = "(usec)";
 237                 char *minp, *maxp;
 238
 239                 if (!usec_to_msec(&min, &max, &mean, &dev))
 240                         base = "(msec)";
 241
 242                 minp = num2str(min, 6, 1, 0);
 243                 maxp = num2str(max, 6, 1, 0);
 244
 245                 log_info("    clat %s: min=%s, max=%s, avg=%5.02f,"
 246                          " stdev=%5.02f\n", base, minp, maxp, mean, dev);
 247
 248                 free(minp);
 249                 free(maxp);
 250         }
 251         if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
 252                 double p_of_agg;
 253
 254                 p_of_agg = mean * 100 / (double) rs->agg[ddir];
 255                 log_info("    bw (KiB/s) : min=%5lu, max=%5lu, per=%3.2f%%,"
 256                          " avg=%5.02f, stdev=%5.02f\n", min, max, p_of_agg,
 257                                                         mean, dev);
 258         }
 259 }
 260
 261 static void show_lat(double *io_u_lat, int nr, const char **ranges,
 262                      const char *msg)
 263 {
 264         int new_line = 1, i, line = 0;
 265
 266         for (i = 0; i < nr; i++) {
 267                 if (io_u_lat[i] <= 0.0)
 268                         continue;
 269                 if (new_line) {
 270                         if (line)
 271                                 log_info("\n");
 272                         log_info("     lat (%s): ", msg);
 273                         new_line = 0;
 274                         line = 0;
 275                 }
 276                 if (line)
 277                         log_info(", ");
 278                 log_info("%s%3.2f%%", ranges[i], io_u_lat[i]);
 279                 line++;
 280                 if (line == 5)
 281                         new_line = 1;
 282         }
 283 }
 284
 285 static void show_lat_u(double *io_u_lat_u)
 286 {
 287         const char *ranges[] = { "2=", "4=", "10=", "20=", "50=", "100=",
 288                                  "250=", "500=", "750=", "1000=", };
 289
 290         show_lat(io_u_lat_u, FIO_IO_U_LAT_U_NR, ranges, "usec");
 291 }
 292
 293 static void show_lat_m(double *io_u_lat_m)
 294 {
 295         const char *ranges[] = { "2=", "4=", "10=", "20=", "50=", "100=",
 296                                  "250=", "500=", "750=", "1000=", "2000=",
 297                                  ">=2000=", };
 298
 299         show_lat(io_u_lat_m, FIO_IO_U_LAT_M_NR, ranges, "msec");
 300 }
 301
 302 static void show_latencies(double *io_u_lat_u, double *io_u_lat_m)
 303 {
 304         show_lat_u(io_u_lat_u);
 305         log_info("\n");
 306         show_lat_m(io_u_lat_m);
 307         log_info("\n");
 308 }
 309
 310 static void show_thread_status(struct thread_stat *ts,
 311                                struct group_run_stats *rs)
 312 {
 313         double usr_cpu, sys_cpu;
 314         unsigned long runtime;
 315         double io_u_dist[FIO_IO_U_MAP_NR];
 316         double io_u_lat_u[FIO_IO_U_LAT_U_NR];
 317         double io_u_lat_m[FIO_IO_U_LAT_M_NR];
 318
 319         if (!(ts->io_bytes[0] + ts->io_bytes[1]) &&
 320             !(ts->total_io_u[0] + ts->total_io_u[1]))
 321                 return;
 322
 323         if (!ts->error) {
 324                 log_info("%s: (groupid=%d, jobs=%d): err=%2d: pid=%d\n",
 325                                         ts->name, ts->groupid, ts->members,
 326                                         ts->error, (int) ts->pid);
 327         } else {
 328                 log_info("%s: (groupid=%d, jobs=%d): err=%2d (%s): pid=%d\n",
 329                                         ts->name, ts->groupid, ts->members,
 330                                         ts->error, ts->verror, (int) ts->pid);
 331         }
 332
 333         if (ts->description)
 334                 log_info("  Description  : [%s]\n", ts->description);
 335
 336         if (ts->io_bytes[DDIR_READ])
 337                 show_ddir_status(rs, ts, DDIR_READ);
 338         if (ts->io_bytes[DDIR_WRITE])
 339                 show_ddir_status(rs, ts, DDIR_WRITE);
 340
 341         runtime = ts->total_run_time;
 342         if (runtime) {
 343                 double runt = (double) runtime;
 344
 345                 usr_cpu = (double) ts->usr_time * 100 / runt;
 346                 sys_cpu = (double) ts->sys_time * 100 / runt;
 347         } else {
 348                 usr_cpu = 0;
 349                 sys_cpu = 0;
 350         }
 351
 352         log_info("  cpu          : usr=%3.2f%%, sys=%3.2f%%, ctx=%lu, majf=%lu,"
 353                  " minf=%lu\n", usr_cpu, sys_cpu, ts->ctx, ts->majf, ts->minf);
 354
 355         stat_calc_dist(ts->io_u_map, ts_total_io_u(ts), io_u_dist);
 356         log_info("  IO depths    : 1=%3.1f%%, 2=%3.1f%%, 4=%3.1f%%, 8=%3.1f%%,"
 357                  " 16=%3.1f%%, 32=%3.1f%%, >=64=%3.1f%%\n", io_u_dist[0],
 358                                         io_u_dist[1], io_u_dist[2],
 359                                         io_u_dist[3], io_u_dist[4],
 360                                         io_u_dist[5], io_u_dist[6]);
 361
 362         stat_calc_dist(ts->io_u_submit, ts->total_submit, io_u_dist);
 363         log_info("     submit    : 0=%3.1f%%, 4=%3.1f%%, 8=%3.1f%%, 16=%3.1f%%,"
 364                  " 32=%3.1f%%, 64=%3.1f%%, >=64=%3.1f%%\n", io_u_dist[0],
 365                                         io_u_dist[1], io_u_dist[2],
 366                                         io_u_dist[3], io_u_dist[4],
 367                                         io_u_dist[5], io_u_dist[6]);
 368         stat_calc_dist(ts->io_u_complete, ts->total_complete, io_u_dist);
 369         log_info("     complete  : 0=%3.1f%%, 4=%3.1f%%, 8=%3.1f%%, 16=%3.1f%%,"
 370                  " 32=%3.1f%%, 64=%3.1f%%, >=64=%3.1f%%\n", io_u_dist[0],
 371                                         io_u_dist[1], io_u_dist[2],
 372                                         io_u_dist[3], io_u_dist[4],
 373                                         io_u_dist[5], io_u_dist[6]);
 374         log_info("     issued r/w: total=%lu/%lu, short=%lu/%lu\n",
 375                                         ts->total_io_u[0], ts->total_io_u[1],
 376                                         ts->short_io_u[0], ts->short_io_u[1]);
 377         stat_calc_lat_u(ts, io_u_lat_u);
 378         stat_calc_lat_m(ts, io_u_lat_m);
 379         show_latencies(io_u_lat_u, io_u_lat_m);
 380 }
 381
 382 static void show_ddir_status_terse(struct thread_stat *ts,
 383                                    struct group_run_stats *rs, int ddir)
 384 {
 385         unsigned long min, max;
 386         unsigned long long bw;
 387         double mean, dev;
 388
 389         bw = 0;
 390         if (ts->runtime[ddir])
 391                 bw = ts->io_bytes[ddir] / ts->runtime[ddir];
 392
 393         log_info(";%llu;%llu;%lu", ts->io_bytes[ddir] >> 10, bw,
 394                                                         ts->runtime[ddir]);
 395
 396         if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
 397                 log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
 398         else
 399                 log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
 400
 401         if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev))
 402                 log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
 403         else
 404                 log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
 405
 406         if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
 407                 double p_of_agg;
 408
 409                 p_of_agg = mean * 100 / (double) rs->agg[ddir];
 410                 log_info(";%lu;%lu;%f%%;%f;%f", min, max, p_of_agg, mean, dev);
 411         } else
 412                 log_info(";%lu;%lu;%f%%;%f;%f", 0UL, 0UL, 0.0, 0.0, 0.0);
 413 }
 414
 415
 416 static void show_thread_status_terse(struct thread_stat *ts,
 417                                      struct group_run_stats *rs)
 418 {
 419         double io_u_dist[FIO_IO_U_MAP_NR];
 420         double io_u_lat_u[FIO_IO_U_LAT_U_NR];
 421         double io_u_lat_m[FIO_IO_U_LAT_M_NR];
 422         double usr_cpu, sys_cpu;
 423         int i;
 424
 425         log_info("%s;%d;%d", ts->name, ts->groupid, ts->error);
 426
 427         show_ddir_status_terse(ts, rs, 0);
 428         show_ddir_status_terse(ts, rs, 1);
 429
 430         if (ts->total_run_time) {
 431                 double runt = (double) ts->total_run_time;
 432
 433                 usr_cpu = (double) ts->usr_time * 100 / runt;
 434                 sys_cpu = (double) ts->sys_time * 100 / runt;
 435         } else {
 436                 usr_cpu = 0;
 437                 sys_cpu = 0;
 438         }
 439
 440         log_info(";%f%%;%f%%;%lu;%lu;%lu", usr_cpu, sys_cpu, ts->ctx, ts->majf,
 441                                                                 ts->minf);
 442
 443         stat_calc_dist(ts->io_u_map, ts_total_io_u(ts), io_u_dist);
 444         stat_calc_lat_u(ts, io_u_lat_u);
 445         stat_calc_lat_m(ts, io_u_lat_m);
 446
 447         log_info(";%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%",
 448                         io_u_dist[0], io_u_dist[1], io_u_dist[2], io_u_dist[3],
 449                         io_u_dist[4], io_u_dist[5], io_u_dist[6]);
 450
 451         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++)
 452                 log_info(";%3.2f%%", io_u_lat_u[i]);
 453         for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
 454                 log_info(";%3.2f%%", io_u_lat_m[i]);
 455         log_info("\n");
 456
 457         if (ts->description)
 458                 log_info(";%s", ts->description);
 459
 460         log_info("\n");
 461 }
 462
 463 static void sum_stat(struct io_stat *dst, struct io_stat *src, int nr)
 464 {
 465         double mean, S;
 466
 467         dst->min_val = min(dst->min_val, src->min_val);
 468         dst->max_val = max(dst->max_val, src->max_val);
 469         dst->samples += src->samples;
 470
 471         /*
 472          * Needs a new method for calculating stddev, we cannot just
 473          * average them we do below for nr > 1
 474          */
 475         if (nr == 1) {
 476                 mean = src->mean;
 477                 S = src->S;
 478         } else {
 479                 mean = ((src->mean * (double) (nr - 1))
 480                                 + dst->mean) / ((double) nr);
 481                 S = ((src->S * (double) (nr - 1)) + dst->S) / ((double) nr);
 482         }
 483
 484         dst->mean = mean;
 485         dst->S = S;
 486 }
 487
 488 void show_run_stats(void)
 489 {
 490         struct group_run_stats *runstats, *rs;
 491         struct thread_data *td;
 492         struct thread_stat *threadstats, *ts;
 493         int i, j, k, l, nr_ts, last_ts, idx;
 494
 495         runstats = malloc(sizeof(struct group_run_stats) * (groupid + 1));
 496
 497         for (i = 0; i < groupid + 1; i++) {
 498                 rs = &runstats[i];
 499
 500                 memset(rs, 0, sizeof(*rs));
 501                 rs->min_bw[0] = rs->min_run[0] = ~0UL;
 502                 rs->min_bw[1] = rs->min_run[1] = ~0UL;
 503         }
 504
 505         /*
 506          * find out how many threads stats we need. if group reporting isn't
 507          * enabled, it's one-per-td.
 508          */
 509         nr_ts = 0;
 510         last_ts = -1;
 511         for_each_td(td, i) {
 512                 if (!td->o.group_reporting) {
 513                         nr_ts++;
 514                         continue;
 515                 }
 516                 if (last_ts == td->groupid)
 517                         continue;
 518
 519                 last_ts = td->groupid;
 520                 nr_ts++;
 521         }
 522
 523         threadstats = malloc(nr_ts * sizeof(struct thread_stat));
 524
 525         for (i = 0; i < nr_ts; i++) {
 526                 ts = &threadstats[i];
 527
 528                 memset(ts, 0, sizeof(*ts));
 529                 for (j = 0; j <= DDIR_WRITE; j++) {
 530                         ts->clat_stat[j].min_val = -1UL;
 531                         ts->slat_stat[j].min_val = -1UL;
 532                         ts->bw_stat[j].min_val = -1UL;
 533                 }
 534                 ts->groupid = -1;
 535         }
 536
 537         j = 0;
 538         last_ts = -1;
 539         idx = 0;
 540         for_each_td(td, i) {
 541                 if (idx && (!td->o.group_reporting ||
 542                     (td->o.group_reporting && last_ts != td->groupid))) {
 543                         idx = 0;
 544                         j++;
 545                 }
 546
 547                 last_ts = td->groupid;
 548
 549                 ts = &threadstats[j];
 550
 551                 idx++;
 552                 ts->members++;
 553
 554                 if (ts->groupid == -1) {
 555                         /*
 556                          * These are per-group shared already
 557                          */
 558                         ts->name = td->o.name;
 559                         ts->description = td->o.description;
 560                         ts->groupid = td->groupid;
 561
 562                         /*
 563                          * first pid in group, not very useful...
 564                          */
 565                         ts->pid = td->pid;
 566                 }
 567
 568                 if (td->error && !ts->error) {
 569                         ts->error = td->error;
 570                         ts->verror = td->verror;
 571                 }
 572
 573                 for (l = 0; l <= DDIR_WRITE; l++) {
 574                         sum_stat(&ts->clat_stat[l], &td->ts.clat_stat[l], idx);
 575                         sum_stat(&ts->slat_stat[l], &td->ts.slat_stat[l], idx);
 576                         sum_stat(&ts->bw_stat[l], &td->ts.bw_stat[l], idx);
 577
 578                         ts->stat_io_bytes[l] += td->ts.stat_io_bytes[l];
 579                         ts->io_bytes[l] += td->ts.io_bytes[l];
 580
 581                         if (ts->runtime[l] < td->ts.runtime[l])
 582                                 ts->runtime[l] = td->ts.runtime[l];
 583                 }
 584
 585                 ts->usr_time += td->ts.usr_time;
 586                 ts->sys_time += td->ts.sys_time;
 587                 ts->ctx += td->ts.ctx;
 588                 ts->majf += td->ts.majf;
 589                 ts->minf += td->ts.minf;
 590
 591                 for (k = 0; k < FIO_IO_U_MAP_NR; k++)
 592                         ts->io_u_map[k] += td->ts.io_u_map[k];
 593                 for (k = 0; k < FIO_IO_U_MAP_NR; k++)
 594                         ts->io_u_submit[k] += td->ts.io_u_submit[k];
 595                 for (k = 0; k < FIO_IO_U_MAP_NR; k++)
 596                         ts->io_u_complete[k] += td->ts.io_u_complete[k];
 597                 for (k = 0; k < FIO_IO_U_LAT_U_NR; k++)
 598                         ts->io_u_lat_u[k] += td->ts.io_u_lat_u[k];
 599                 for (k = 0; k < FIO_IO_U_LAT_M_NR; k++)
 600                         ts->io_u_lat_m[k] += td->ts.io_u_lat_m[k];
 601
 602
 603                 for (k = 0; k <= DDIR_WRITE; k++) {
 604                         ts->total_io_u[k] += td->ts.total_io_u[k];
 605                         ts->short_io_u[k] += td->ts.short_io_u[k];
 606                 }
 607
 608                 ts->total_run_time += td->ts.total_run_time;
 609                 ts->total_submit += td->ts.total_submit;
 610                 ts->total_complete += td->ts.total_complete;
 611         }
 612
 613         for (i = 0; i < nr_ts; i++) {
 614                 unsigned long long bw;
 615
 616                 ts = &threadstats[i];
 617                 rs = &runstats[ts->groupid];
 618
 619                 for (j = 0; j <= DDIR_WRITE; j++) {
 620                         if (!ts->runtime[j])
 621                                 continue;
 622                         if (ts->runtime[j] < rs->min_run[j] || !rs->min_run[j])
 623                                 rs->min_run[j] = ts->runtime[j];
 624                         if (ts->runtime[j] > rs->max_run[j])
 625                                 rs->max_run[j] = ts->runtime[j];
 626
 627                         bw = 0;
 628                         if (ts->runtime[j]) {
 629                                 unsigned long runt;
 630
 631                                 runt = ts->runtime[j] * 1024 / 1000;
 632                                 bw = ts->io_bytes[j] / runt;
 633                         }
 634                         if (bw < rs->min_bw[j])
 635                                 rs->min_bw[j] = bw;
 636                         if (bw > rs->max_bw[j])
 637                                 rs->max_bw[j] = bw;
 638
 639                         rs->io_kb[j] += ts->io_bytes[j] >> 10;
 640                 }
 641         }
 642
 643         for (i = 0; i < groupid + 1; i++) {
 644                 unsigned long max_run[2];
 645
 646                 rs = &runstats[i];
 647                 max_run[0] = rs->max_run[0] * 1024 / 1000;
 648                 max_run[1] = rs->max_run[1] * 1024 / 1000;
 649
 650                 if (rs->max_run[0])
 651                         rs->agg[0] = (rs->io_kb[0]*1024) / max_run[0];
 652                 if (rs->max_run[1])
 653                         rs->agg[1] = (rs->io_kb[1]*1024) / max_run[1];
 654         }
 655
 656         /*
 657          * don't overwrite last signal output
 658          */
 659         if (!terse_output)
 660                 printf("\n");
 661
 662         for (i = 0; i < nr_ts; i++) {
 663                 ts = &threadstats[i];
 664                 rs = &runstats[ts->groupid];
 665
 666                 if (terse_output)
 667                         show_thread_status_terse(ts, rs);
 668                 else
 669                         show_thread_status(ts, rs);
 670         }
 671
 672         if (!terse_output) {
 673                 for (i = 0; i < groupid + 1; i++)
 674                         show_group_stats(&runstats[i], i);
 675
 676                 show_disk_util();
 677         }
 678
 679         free(runstats);
 680         free(threadstats);
 681 }
 682
 683 static inline void add_stat_sample(struct io_stat *is, unsigned long data)
 684 {
 685         double val = data;
 686         double delta;
 687
 688         if (data > is->max_val)
 689                 is->max_val = data;
 690         if (data < is->min_val)
 691                 is->min_val = data;
 692
 693         delta = val - is->mean;
 694         if (delta) {
 695                 is->mean += delta / (is->samples + 1.0);
 696                 is->S += delta * (val - is->mean);
 697         }
 698
 699         is->samples++;
 700 }
 701
 702 static void __add_log_sample(struct io_log *iolog, unsigned long val,
 703                              enum fio_ddir ddir, unsigned int bs,
 704                              unsigned long time)
 705 {
 706         const int nr_samples = iolog->nr_samples;
 707
 708         if (iolog->nr_samples == iolog->max_samples) {
 709                 int new_size = sizeof(struct io_sample) * iolog->max_samples*2;
 710
 711                 iolog->log = realloc(iolog->log, new_size);
 712                 iolog->max_samples <<= 1;
 713         }
 714
 715         iolog->log[nr_samples].val = val;
 716         iolog->log[nr_samples].time = time;
 717         iolog->log[nr_samples].ddir = ddir;
 718         iolog->log[nr_samples].bs = bs;
 719         iolog->nr_samples++;
 720 }
 721
 722 static void add_log_sample(struct thread_data *td, struct io_log *iolog,
 723                            unsigned long val, enum fio_ddir ddir,
 724                            unsigned int bs)
 725 {
 726         __add_log_sample(iolog, val, ddir, bs, mtime_since_now(&td->epoch));
 727 }
 728
 729 void add_agg_sample(unsigned long val, enum fio_ddir ddir, unsigned int bs)
 730 {
 731         struct io_log *iolog = agg_io_log[ddir];
 732
 733         __add_log_sample(iolog, val, ddir, bs, mtime_since_genesis());
 734 }
 735
 736 void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
 737                      unsigned long usec, unsigned int bs)
 738 {
 739         struct thread_stat *ts = &td->ts;
 740
 741         add_stat_sample(&ts->clat_stat[ddir], usec);
 742
 743         if (ts->clat_log)
 744                 add_log_sample(td, ts->clat_log, usec, ddir, bs);
 745 }
 746
 747 void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
 748                      unsigned long usec, unsigned int bs)
 749 {
 750         struct thread_stat *ts = &td->ts;
 751
 752         add_stat_sample(&ts->slat_stat[ddir], usec);
 753
 754         if (ts->slat_log)
 755                 add_log_sample(td, ts->slat_log, usec, ddir, bs);
 756 }
 757
 758 void add_bw_sample(struct thread_data *td, enum fio_ddir ddir, unsigned int bs,
 759                    struct timeval *t)
 760 {
 761         struct thread_stat *ts = &td->ts;
 762         unsigned long spent = mtime_since(&ts->stat_sample_time[ddir], t);
 763         unsigned long rate;
 764
 765         if (spent < td->o.bw_avg_time)
 766                 return;
 767
 768         rate = (td->this_io_bytes[ddir] - ts->stat_io_bytes[ddir]) * 1000 / spent / 1024;
 769         add_stat_sample(&ts->bw_stat[ddir], rate);
 770
 771         if (ts->bw_log)
 772                 add_log_sample(td, ts->bw_log, rate, ddir, bs);
 773
 774         fio_gettime(&ts->stat_sample_time[ddir], NULL);
 775         ts->stat_io_bytes[ddir] = td->this_io_bytes[ddir];
 776 }