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 }
 339
 340 static void show_ddir_status_terse(struct thread_stat *ts,
 341                                    struct group_run_stats *rs, int ddir)
 342 {
 343         unsigned long min, max;
 344         unsigned long long bw;
 345         double mean, dev;
 346
 347         bw = 0;
 348         if (ts->runtime[ddir])
 349                 bw = ts->io_bytes[ddir] / ts->runtime[ddir];
 350
 351         log_info(";%llu;%llu;%lu", ts->io_bytes[ddir] >> 10, bw,
 352                                                         ts->runtime[ddir]);
 353
 354         if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
 355                 log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
 356         else
 357                 log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
 358
 359         if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev))
 360                 log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
 361         else
 362                 log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
 363
 364         if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
 365                 double p_of_agg;
 366
 367                 p_of_agg = mean * 100 / (double) rs->agg[ddir];
 368                 log_info(";%lu;%lu;%f%%;%f;%f", min, max, p_of_agg, mean, dev);
 369         } else
 370                 log_info(";%lu;%lu;%f%%;%f;%f", 0UL, 0UL, 0.0, 0.0, 0.0);
 371 }
 372
 373
 374 static void show_thread_status_terse(struct thread_stat *ts,
 375                                      struct group_run_stats *rs)
 376 {
 377         double io_u_dist[FIO_IO_U_MAP_NR];
 378         double io_u_lat_u[FIO_IO_U_LAT_U_NR];
 379         double io_u_lat_m[FIO_IO_U_LAT_M_NR];
 380         double usr_cpu, sys_cpu;
 381         int i;
 382
 383         log_info("%s;%d;%d", ts->name, ts->groupid, ts->error);
 384
 385         show_ddir_status_terse(ts, rs, 0);
 386         show_ddir_status_terse(ts, rs, 1);
 387
 388         if (ts->total_run_time) {
 389                 double runt = (double) ts->total_run_time;
 390
 391                 usr_cpu = (double) ts->usr_time * 100 / runt;
 392                 sys_cpu = (double) ts->sys_time * 100 / runt;
 393         } else {
 394                 usr_cpu = 0;
 395                 sys_cpu = 0;
 396         }
 397
 398         log_info(";%f%%;%f%%;%lu;%lu;%lu", usr_cpu, sys_cpu, ts->ctx, ts->majf,
 399                                                                 ts->minf);
 400
 401         stat_calc_dist(ts->io_u_map, ts_total_io_u(ts), io_u_dist);
 402         stat_calc_lat_u(ts, io_u_lat_u);
 403         stat_calc_lat_m(ts, io_u_lat_m);
 404
 405         log_info(";%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%",
 406                         io_u_dist[0], io_u_dist[1], io_u_dist[2], io_u_dist[3],
 407                         io_u_dist[4], io_u_dist[5], io_u_dist[6]);
 408
 409         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++)
 410                 log_info(";%3.2f%%", io_u_lat_u[i]);
 411         for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
 412                 log_info(";%3.2f%%", io_u_lat_m[i]);
 413         log_info("\n");
 414
 415         if (ts->description)
 416                 log_info(";%s", ts->description);
 417
 418         log_info("\n");
 419 }
 420
 421 static void sum_stat(struct io_stat *dst, struct io_stat *src, int nr)
 422 {
 423         double mean, S;
 424
 425         dst->min_val = min(dst->min_val, src->min_val);
 426         dst->max_val = max(dst->max_val, src->max_val);
 427         dst->samples += src->samples;
 428
 429         /*
 430          * Needs a new method for calculating stddev, we cannot just
 431          * average them we do below for nr > 1
 432          */
 433         if (nr == 1) {
 434                 mean = src->mean;
 435                 S = src->S;
 436         } else {
 437                 mean = ((src->mean * (double) (nr - 1))
 438                                 + dst->mean) / ((double) nr);
 439                 S = ((src->S * (double) (nr - 1)) + dst->S) / ((double) nr);
 440         }
 441
 442         dst->mean = mean;
 443         dst->S = S;
 444 }
 445
 446 void show_run_stats(void)
 447 {
 448         struct group_run_stats *runstats, *rs;
 449         struct thread_data *td;
 450         struct thread_stat *threadstats, *ts;
 451         int i, j, k, l, nr_ts, last_ts, idx;
 452
 453         runstats = malloc(sizeof(struct group_run_stats) * (groupid + 1));
 454
 455         for (i = 0; i < groupid + 1; i++) {
 456                 rs = &runstats[i];
 457
 458                 memset(rs, 0, sizeof(*rs));
 459                 rs->min_bw[0] = rs->min_run[0] = ~0UL;
 460                 rs->min_bw[1] = rs->min_run[1] = ~0UL;
 461         }
 462
 463         /*
 464          * find out how many threads stats we need. if group reporting isn't
 465          * enabled, it's one-per-td.
 466          */
 467         nr_ts = 0;
 468         last_ts = -1;
 469         for_each_td(td, i) {
 470                 if (!td->o.group_reporting) {
 471                         nr_ts++;
 472                         continue;
 473                 }
 474                 if (last_ts == td->groupid)
 475                         continue;
 476
 477                 last_ts = td->groupid;
 478                 nr_ts++;
 479         }
 480
 481         threadstats = malloc(nr_ts * sizeof(struct thread_stat));
 482
 483         for (i = 0; i < nr_ts; i++) {
 484                 ts = &threadstats[i];
 485
 486                 memset(ts, 0, sizeof(*ts));
 487                 for (j = 0; j <= DDIR_WRITE; j++) {
 488                         ts->clat_stat[j].min_val = -1UL;
 489                         ts->slat_stat[j].min_val = -1UL;
 490                         ts->bw_stat[j].min_val = -1UL;
 491                 }
 492                 ts->groupid = -1;
 493         }
 494
 495         j = 0;
 496         last_ts = -1;
 497         idx = 0;
 498         for_each_td(td, i) {
 499                 if (idx && (!td->o.group_reporting ||
 500                     (td->o.group_reporting && last_ts != td->groupid))) {
 501                         idx = 0;
 502                         j++;
 503                 }
 504
 505                 last_ts = td->groupid;
 506
 507                 ts = &threadstats[j];
 508
 509                 idx++;
 510                 ts->members++;
 511
 512                 if (ts->groupid == -1) {
 513                         /*
 514                          * These are per-group shared already
 515                          */
 516                         ts->name = td->o.name;
 517                         ts->description = td->o.description;
 518                         ts->groupid = td->groupid;
 519
 520                         /*
 521                          * first pid in group, not very useful...
 522                          */
 523                         ts->pid = td->pid;
 524                 }
 525
 526                 if (td->error && !ts->error) {
 527                         ts->error = td->error;
 528                         ts->verror = td->verror;
 529                 }
 530
 531                 for (l = 0; l <= DDIR_WRITE; l++) {
 532                         sum_stat(&ts->clat_stat[l], &td->ts.clat_stat[l], idx);
 533                         sum_stat(&ts->slat_stat[l], &td->ts.slat_stat[l], idx);
 534                         sum_stat(&ts->bw_stat[l], &td->ts.bw_stat[l], idx);
 535
 536                         ts->stat_io_bytes[l] += td->ts.stat_io_bytes[l];
 537                         ts->io_bytes[l] += td->ts.io_bytes[l];
 538
 539                         if (ts->runtime[l] < td->ts.runtime[l])
 540                                 ts->runtime[l] = td->ts.runtime[l];
 541                 }
 542
 543                 ts->usr_time += td->ts.usr_time;
 544                 ts->sys_time += td->ts.sys_time;
 545                 ts->ctx += td->ts.ctx;
 546                 ts->majf += td->ts.majf;
 547                 ts->minf += td->ts.minf;
 548
 549                 for (k = 0; k < FIO_IO_U_MAP_NR; k++)
 550                         ts->io_u_map[k] += td->ts.io_u_map[k];
 551                 for (k = 0; k < FIO_IO_U_MAP_NR; k++)
 552                         ts->io_u_submit[k] += td->ts.io_u_submit[k];
 553                 for (k = 0; k < FIO_IO_U_MAP_NR; k++)
 554                         ts->io_u_complete[k] += td->ts.io_u_complete[k];
 555                 for (k = 0; k < FIO_IO_U_LAT_U_NR; k++)
 556                         ts->io_u_lat_u[k] += td->ts.io_u_lat_u[k];
 557                 for (k = 0; k < FIO_IO_U_LAT_M_NR; k++)
 558                         ts->io_u_lat_m[k] += td->ts.io_u_lat_m[k];
 559
 560
 561                 for (k = 0; k <= DDIR_WRITE; k++) {
 562                         ts->total_io_u[k] += td->ts.total_io_u[k];
 563                         ts->short_io_u[k] += td->ts.short_io_u[k];
 564                 }
 565
 566                 ts->total_run_time += td->ts.total_run_time;
 567                 ts->total_submit += td->ts.total_submit;
 568                 ts->total_complete += td->ts.total_complete;
 569         }
 570
 571         for (i = 0; i < nr_ts; i++) {
 572                 unsigned long long bw;
 573
 574                 ts = &threadstats[i];
 575                 rs = &runstats[ts->groupid];
 576
 577                 for (j = 0; j <= DDIR_WRITE; j++) {
 578                         if (!ts->runtime[j])
 579                                 continue;
 580                         if (ts->runtime[j] < rs->min_run[j] || !rs->min_run[j])
 581                                 rs->min_run[j] = ts->runtime[j];
 582                         if (ts->runtime[j] > rs->max_run[j])
 583                                 rs->max_run[j] = ts->runtime[j];
 584
 585                         bw = 0;
 586                         if (ts->runtime[j]) {
 587                                 unsigned long runt;
 588
 589                                 runt = ts->runtime[j] * 1024 / 1000;
 590                                 bw = ts->io_bytes[j] / runt;
 591                         }
 592                         if (bw < rs->min_bw[j])
 593                                 rs->min_bw[j] = bw;
 594                         if (bw > rs->max_bw[j])
 595                                 rs->max_bw[j] = bw;
 596
 597                         rs->io_kb[j] += ts->io_bytes[j] >> 10;
 598                 }
 599         }
 600
 601         for (i = 0; i < groupid + 1; i++) {
 602                 unsigned long max_run[2];
 603
 604                 rs = &runstats[i];
 605                 max_run[0] = rs->max_run[0] * 1024 / 1000;
 606                 max_run[1] = rs->max_run[1] * 1024 / 1000;
 607
 608                 if (rs->max_run[0])
 609                         rs->agg[0] = (rs->io_kb[0]*1024) / max_run[0];
 610                 if (rs->max_run[1])
 611                         rs->agg[1] = (rs->io_kb[1]*1024) / max_run[1];
 612         }
 613
 614         /*
 615          * don't overwrite last signal output
 616          */
 617         if (!terse_output)
 618                 printf("\n");
 619
 620         for (i = 0; i < nr_ts; i++) {
 621                 ts = &threadstats[i];
 622                 rs = &runstats[ts->groupid];
 623
 624                 if (terse_output)
 625                         show_thread_status_terse(ts, rs);
 626                 else
 627                         show_thread_status(ts, rs);
 628         }
 629
 630         if (!terse_output) {
 631                 for (i = 0; i < groupid + 1; i++)
 632                         show_group_stats(&runstats[i], i);
 633
 634                 show_disk_util();
 635         }
 636
 637         free(runstats);
 638         free(threadstats);
 639 }
 640
 641 static inline void add_stat_sample(struct io_stat *is, unsigned long data)
 642 {
 643         double val = data;
 644         double delta;
 645
 646         if (data > is->max_val)
 647                 is->max_val = data;
 648         if (data < is->min_val)
 649                 is->min_val = data;
 650
 651         delta = val - is->mean;
 652         if (delta) {
 653                 is->mean += delta / (is->samples + 1.0);
 654                 is->S += delta * (val - is->mean);
 655         }
 656
 657         is->samples++;
 658 }
 659
 660 static void __add_log_sample(struct io_log *iolog, unsigned long val,
 661                              enum fio_ddir ddir, unsigned int bs,
 662                              unsigned long time)
 663 {
 664         const int nr_samples = iolog->nr_samples;
 665
 666         if (iolog->nr_samples == iolog->max_samples) {
 667                 int new_size = sizeof(struct io_sample) * iolog->max_samples*2;
 668
 669                 iolog->log = realloc(iolog->log, new_size);
 670                 iolog->max_samples <<= 1;
 671         }
 672
 673         iolog->log[nr_samples].val = val;
 674         iolog->log[nr_samples].time = time;
 675         iolog->log[nr_samples].ddir = ddir;
 676         iolog->log[nr_samples].bs = bs;
 677         iolog->nr_samples++;
 678 }
 679
 680 static void add_log_sample(struct thread_data *td, struct io_log *iolog,
 681                            unsigned long val, enum fio_ddir ddir,
 682                            unsigned int bs)
 683 {
 684         __add_log_sample(iolog, val, ddir, bs, mtime_since_now(&td->epoch));
 685 }
 686
 687 void add_agg_sample(unsigned long val, enum fio_ddir ddir, unsigned int bs)
 688 {
 689         struct io_log *iolog = agg_io_log[ddir];
 690
 691         __add_log_sample(iolog, val, ddir, bs, mtime_since_genesis());
 692 }
 693
 694 void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
 695                      unsigned long usec, unsigned int bs)
 696 {
 697         struct thread_stat *ts = &td->ts;
 698
 699         add_stat_sample(&ts->clat_stat[ddir], usec);
 700
 701         if (ts->clat_log)
 702                 add_log_sample(td, ts->clat_log, usec, ddir, bs);
 703 }
 704
 705 void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
 706                      unsigned long usec, unsigned int bs)
 707 {
 708         struct thread_stat *ts = &td->ts;
 709
 710         add_stat_sample(&ts->slat_stat[ddir], usec);
 711
 712         if (ts->slat_log)
 713                 add_log_sample(td, ts->slat_log, usec, ddir, bs);
 714 }
 715
 716 void add_bw_sample(struct thread_data *td, enum fio_ddir ddir, unsigned int bs,
 717                    struct timeval *t)
 718 {
 719         struct thread_stat *ts = &td->ts;
 720         unsigned long spent = mtime_since(&ts->stat_sample_time[ddir], t);
 721         unsigned long rate;
 722
 723         if (spent < td->o.bw_avg_time)
 724                 return;
 725
 726         rate = (td->this_io_bytes[ddir] - ts->stat_io_bytes[ddir]) * 1000 / spent / 1024;
 727         add_stat_sample(&ts->bw_stat[ddir], rate);
 728
 729         if (ts->bw_log)
 730                 add_log_sample(td, ts->bw_log, rate, ddir, bs);
 731
 732         fio_gettime(&ts->stat_sample_time[ddir], NULL);
 733         ts->stat_io_bytes[ddir] = td->this_io_bytes[ddir];
 734 }