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