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                 const int i2p = is_power_of_2(rs->kb_base);
  63
  64                 if (!rs->max_run[i])
  65                         continue;
  66
  67                 p1 = num2str(rs->io_kb[i], 6, rs->kb_base, i2p);
  68                 p2 = num2str(rs->agg[i], 6, rs->kb_base, i2p);
  69                 p3 = num2str(rs->min_bw[i], 6, rs->kb_base, i2p);
  70                 p4 = num2str(rs->max_bw[i], 6, rs->kb_base, i2p);
  71
  72                 log_info("%s: io=%sB, aggrb=%sB/s, minb=%sB/s, maxb=%sB/s,"
  73                          " mint=%llumsec, maxt=%llumsec\n", ddir_str[i], p1, p2,
  74                                                 p3, p4, rs->min_run[i],
  75                                                 rs->max_run[i]);
  76
  77                 free(p1);
  78                 free(p2);
  79                 free(p3);
  80                 free(p4);
  81         }
  82 }
  83
  84 #define ts_total_io_u(ts)       \
  85         ((ts)->total_io_u[0] + (ts)->total_io_u[1])
  86
  87 static void stat_calc_dist(unsigned int *map, unsigned long total,
  88                            double *io_u_dist)
  89 {
  90         int i;
  91
  92         /*
  93          * Do depth distribution calculations
  94          */
  95         for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
  96                 if (total) {
  97                         io_u_dist[i] = (double) map[i] / (double) total;
  98                         io_u_dist[i] *= 100.0;
  99                         if (io_u_dist[i] < 0.1 && map[i])
 100                                 io_u_dist[i] = 0.1;
 101                 } else
 102                         io_u_dist[i] = 0.0;
 103         }
 104 }
 105
 106 static void stat_calc_lat(struct thread_stat *ts, double *dst,
 107                           unsigned int *src, int nr)
 108 {
 109         unsigned long total = ts_total_io_u(ts);
 110         int i;
 111
 112         /*
 113          * Do latency distribution calculations
 114          */
 115         for (i = 0; i < nr; i++) {
 116                 if (total) {
 117                         dst[i] = (double) src[i] / (double) total;
 118                         dst[i] *= 100.0;
 119                         if (dst[i] < 0.01 && src[i])
 120                                 dst[i] = 0.01;
 121                 } else
 122                         dst[i] = 0.0;
 123         }
 124 }
 125
 126 static void stat_calc_lat_u(struct thread_stat *ts, double *io_u_lat)
 127 {
 128         stat_calc_lat(ts, io_u_lat, ts->io_u_lat_u, FIO_IO_U_LAT_U_NR);
 129 }
 130
 131 static void stat_calc_lat_m(struct thread_stat *ts, double *io_u_lat)
 132 {
 133         stat_calc_lat(ts, io_u_lat, ts->io_u_lat_m, FIO_IO_U_LAT_M_NR);
 134 }
 135
 136 static int usec_to_msec(unsigned long *min, unsigned long *max, double *mean,
 137                         double *dev)
 138 {
 139         if (*min > 1000 && *max > 1000 && *mean > 1000.0 && *dev > 1000.0) {
 140                 *min /= 1000;
 141                 *max /= 1000;
 142                 *mean /= 1000.0;
 143                 *dev /= 1000.0;
 144                 return 0;
 145         }
 146
 147         return 1;
 148 }
 149
 150 static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
 151                              int ddir)
 152 {
 153         const char *ddir_str[] = { "read ", "write" };
 154         unsigned long min, max, runt;
 155         unsigned long long bw, iops;
 156         double mean, dev;
 157         char *io_p, *bw_p, *iops_p;
 158         int i2p;
 159
 160         assert(ddir_rw(ddir));
 161
 162         if (!ts->runtime[ddir])
 163                 return;
 164
 165         i2p = is_power_of_2(rs->kb_base);
 166         runt = ts->runtime[ddir];
 167
 168         bw = (1000 * ts->io_bytes[ddir]) / runt;
 169         io_p = num2str(ts->io_bytes[ddir], 6, 1, i2p);
 170         bw_p = num2str(bw, 6, 1, i2p);
 171
 172         iops = (1000 * ts->total_io_u[ddir]) / runt;
 173         iops_p = num2str(iops, 6, 1, 0);
 174
 175         log_info("  %s: io=%sB, bw=%sB/s, iops=%s, runt=%6llumsec\n",
 176                                         ddir_str[ddir], io_p, bw_p, iops_p,
 177                                         ts->runtime[ddir]);
 178
 179         free(io_p);
 180         free(bw_p);
 181         free(iops_p);
 182
 183         if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev)) {
 184                 const char *base = "(usec)";
 185                 char *minp, *maxp;
 186
 187                 if (!usec_to_msec(&min, &max, &mean, &dev))
 188                         base = "(msec)";
 189
 190                 minp = num2str(min, 6, 1, 0);
 191                 maxp = num2str(max, 6, 1, 0);
 192
 193                 log_info("    slat %s: min=%s, max=%s, avg=%5.02f,"
 194                          " stdev=%5.02f\n", base, minp, maxp, mean, dev);
 195
 196                 free(minp);
 197                 free(maxp);
 198         }
 199         if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev)) {
 200                 const char *base = "(usec)";
 201                 char *minp, *maxp;
 202
 203                 if (!usec_to_msec(&min, &max, &mean, &dev))
 204                         base = "(msec)";
 205
 206                 minp = num2str(min, 6, 1, 0);
 207                 maxp = num2str(max, 6, 1, 0);
 208
 209                 log_info("    clat %s: min=%s, max=%s, avg=%5.02f,"
 210                          " stdev=%5.02f\n", base, minp, maxp, mean, dev);
 211
 212                 free(minp);
 213                 free(maxp);
 214         }
 215         if (calc_lat(&ts->lat_stat[ddir], &min, &max, &mean, &dev)) {
 216                 const char *base = "(usec)";
 217                 char *minp, *maxp;
 218
 219                 if (!usec_to_msec(&min, &max, &mean, &dev))
 220                         base = "(msec)";
 221
 222                 minp = num2str(min, 6, 1, 0);
 223                 maxp = num2str(max, 6, 1, 0);
 224
 225                 log_info("     lat %s: min=%s, max=%s, avg=%5.02f,"
 226                          " stdev=%5.02f\n", base, minp, maxp, mean, dev);
 227
 228                 free(minp);
 229                 free(maxp);
 230         }
 231         if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
 232                 double p_of_agg;
 233
 234                 p_of_agg = mean * 100 / (double) rs->agg[ddir];
 235                 log_info("    bw (KB/s) : min=%5lu, max=%5lu, per=%3.2f%%,"
 236                          " avg=%5.02f, stdev=%5.02f\n", min, max, p_of_agg,
 237                                                         mean, dev);
 238         }
 239 }
 240
 241 static void show_lat(double *io_u_lat, int nr, const char **ranges,
 242                      const char *msg)
 243 {
 244         int new_line = 1, i, line = 0;
 245
 246         for (i = 0; i < nr; i++) {
 247                 if (io_u_lat[i] <= 0.0)
 248                         continue;
 249                 if (new_line) {
 250                         if (line)
 251                                 log_info("\n");
 252                         log_info("     lat (%s): ", msg);
 253                         new_line = 0;
 254                         line = 0;
 255                 }
 256                 if (line)
 257                         log_info(", ");
 258                 log_info("%s%3.2f%%", ranges[i], io_u_lat[i]);
 259                 line++;
 260                 if (line == 5)
 261                         new_line = 1;
 262         }
 263 }
 264
 265 static void show_lat_u(double *io_u_lat_u)
 266 {
 267         const char *ranges[] = { "2=", "4=", "10=", "20=", "50=", "100=",
 268                                  "250=", "500=", "750=", "1000=", };
 269
 270         show_lat(io_u_lat_u, FIO_IO_U_LAT_U_NR, ranges, "usec");
 271 }
 272
 273 static void show_lat_m(double *io_u_lat_m)
 274 {
 275         const char *ranges[] = { "2=", "4=", "10=", "20=", "50=", "100=",
 276                                  "250=", "500=", "750=", "1000=", "2000=",
 277                                  ">=2000=", };
 278
 279         show_lat(io_u_lat_m, FIO_IO_U_LAT_M_NR, ranges, "msec");
 280 }
 281
 282 static void show_latencies(double *io_u_lat_u, double *io_u_lat_m)
 283 {
 284         show_lat_u(io_u_lat_u);
 285         log_info("\n");
 286         show_lat_m(io_u_lat_m);
 287         log_info("\n");
 288 }
 289
 290 static void show_thread_status(struct thread_stat *ts,
 291                                struct group_run_stats *rs)
 292 {
 293         double usr_cpu, sys_cpu;
 294         unsigned long runtime;
 295         double io_u_dist[FIO_IO_U_MAP_NR];
 296         double io_u_lat_u[FIO_IO_U_LAT_U_NR];
 297         double io_u_lat_m[FIO_IO_U_LAT_M_NR];
 298
 299         if (!(ts->io_bytes[0] + ts->io_bytes[1]) &&
 300             !(ts->total_io_u[0] + ts->total_io_u[1]))
 301                 return;
 302
 303         if (!ts->error) {
 304                 log_info("%s: (groupid=%d, jobs=%d): err=%2d: pid=%d\n",
 305                                         ts->name, ts->groupid, ts->members,
 306                                         ts->error, (int) ts->pid);
 307         } else {
 308                 log_info("%s: (groupid=%d, jobs=%d): err=%2d (%s): pid=%d\n",
 309                                         ts->name, ts->groupid, ts->members,
 310                                         ts->error, ts->verror, (int) ts->pid);
 311         }
 312
 313         if (ts->description)
 314                 log_info("  Description  : [%s]\n", ts->description);
 315
 316         if (ts->io_bytes[DDIR_READ])
 317                 show_ddir_status(rs, ts, DDIR_READ);
 318         if (ts->io_bytes[DDIR_WRITE])
 319                 show_ddir_status(rs, ts, DDIR_WRITE);
 320
 321         runtime = ts->total_run_time;
 322         if (runtime) {
 323                 double runt = (double) runtime;
 324
 325                 usr_cpu = (double) ts->usr_time * 100 / runt;
 326                 sys_cpu = (double) ts->sys_time * 100 / runt;
 327         } else {
 328                 usr_cpu = 0;
 329                 sys_cpu = 0;
 330         }
 331
 332         log_info("  cpu          : usr=%3.2f%%, sys=%3.2f%%, ctx=%lu, majf=%lu,"
 333                  " minf=%lu\n", usr_cpu, sys_cpu, ts->ctx, ts->majf, ts->minf);
 334
 335         stat_calc_dist(ts->io_u_map, ts_total_io_u(ts), io_u_dist);
 336         log_info("  IO depths    : 1=%3.1f%%, 2=%3.1f%%, 4=%3.1f%%, 8=%3.1f%%,"
 337                  " 16=%3.1f%%, 32=%3.1f%%, >=64=%3.1f%%\n", io_u_dist[0],
 338                                         io_u_dist[1], io_u_dist[2],
 339                                         io_u_dist[3], io_u_dist[4],
 340                                         io_u_dist[5], io_u_dist[6]);
 341
 342         stat_calc_dist(ts->io_u_submit, ts->total_submit, io_u_dist);
 343         log_info("     submit    : 0=%3.1f%%, 4=%3.1f%%, 8=%3.1f%%, 16=%3.1f%%,"
 344                  " 32=%3.1f%%, 64=%3.1f%%, >=64=%3.1f%%\n", io_u_dist[0],
 345                                         io_u_dist[1], io_u_dist[2],
 346                                         io_u_dist[3], io_u_dist[4],
 347                                         io_u_dist[5], io_u_dist[6]);
 348         stat_calc_dist(ts->io_u_complete, ts->total_complete, io_u_dist);
 349         log_info("     complete  : 0=%3.1f%%, 4=%3.1f%%, 8=%3.1f%%, 16=%3.1f%%,"
 350                  " 32=%3.1f%%, 64=%3.1f%%, >=64=%3.1f%%\n", io_u_dist[0],
 351                                         io_u_dist[1], io_u_dist[2],
 352                                         io_u_dist[3], io_u_dist[4],
 353                                         io_u_dist[5], io_u_dist[6]);
 354         log_info("     issued r/w/d: total=%lu/%lu/%lu, short=%lu/%lu/%lu\n",
 355                                         ts->total_io_u[0], ts->total_io_u[1],
 356                                         ts->total_io_u[2],
 357                                         ts->short_io_u[0], ts->short_io_u[1],
 358                                         ts->short_io_u[2]);
 359         stat_calc_lat_u(ts, io_u_lat_u);
 360         stat_calc_lat_m(ts, io_u_lat_m);
 361         show_latencies(io_u_lat_u, io_u_lat_m);
 362         if (ts->continue_on_error) {
 363                 log_info("     errors    : total=%lu, first_error=%d/<%s>\n",
 364                                         ts->total_err_count,
 365                                         ts->first_error,
 366                                         strerror(ts->first_error));
 367         }
 368 }
 369
 370 static void show_ddir_status_terse(struct thread_stat *ts,
 371                                    struct group_run_stats *rs, int ddir)
 372 {
 373         unsigned long min, max;
 374         unsigned long long bw;
 375         double mean, dev;
 376
 377         assert(ddir_rw(ddir));
 378
 379         bw = 0;
 380         if (ts->runtime[ddir])
 381                 bw = ts->io_bytes[ddir] / ts->runtime[ddir];
 382
 383         log_info(";%llu;%llu;%llu", ts->io_bytes[ddir] >> 10, bw,
 384                                                         ts->runtime[ddir]);
 385
 386         if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
 387                 log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
 388         else
 389                 log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
 390
 391         if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev))
 392                 log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
 393         else
 394                 log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
 395
 396         if (calc_lat(&ts->lat_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->bw_stat[ddir], &min, &max, &mean, &dev)) {
 402                 double p_of_agg;
 403
 404                 p_of_agg = mean * 100 / (double) rs->agg[ddir];
 405                 log_info(";%lu;%lu;%f%%;%f;%f", min, max, p_of_agg, mean, dev);
 406         } else
 407                 log_info(";%lu;%lu;%f%%;%f;%f", 0UL, 0UL, 0.0, 0.0, 0.0);
 408 }
 409
 410 #define FIO_TERSE_VERSION       "2"
 411
 412 static void show_thread_status_terse(struct thread_stat *ts,
 413                                      struct group_run_stats *rs)
 414 {
 415         double io_u_dist[FIO_IO_U_MAP_NR];
 416         double io_u_lat_u[FIO_IO_U_LAT_U_NR];
 417         double io_u_lat_m[FIO_IO_U_LAT_M_NR];
 418         double usr_cpu, sys_cpu;
 419         int i;
 420
 421         /* General Info */
 422         log_info("%s;%s;%d;%d", FIO_TERSE_VERSION, ts->name, ts->groupid,
 423                                 ts->error);
 424         /* Log Read Status */
 425         show_ddir_status_terse(ts, rs, 0);
 426         /* Log Write Status */
 427         show_ddir_status_terse(ts, rs, 1);
 428
 429         /* CPU Usage */
 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         /* Calc % distribution of IO depths, usecond, msecond latency */
 444         stat_calc_dist(ts->io_u_map, ts_total_io_u(ts), io_u_dist);
 445         stat_calc_lat_u(ts, io_u_lat_u);
 446         stat_calc_lat_m(ts, io_u_lat_m);
 447
 448         /* Only show fixed 7 I/O depth levels*/
 449         log_info(";%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%",
 450                         io_u_dist[0], io_u_dist[1], io_u_dist[2], io_u_dist[3],
 451                         io_u_dist[4], io_u_dist[5], io_u_dist[6]);
 452
 453         /* Microsecond latency */
 454         for (i = 0; i < FIO_IO_U_LAT_U_NR; i++)
 455                 log_info(";%3.2f%%", io_u_lat_u[i]);
 456         /* Millisecond latency */
 457         for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
 458                 log_info(";%3.2f%%", io_u_lat_m[i]);
 459         /* Additional output if continue_on_error set - default off*/
 460         if (ts->continue_on_error)
 461                 log_info(";%lu;%d", ts->total_err_count, ts->first_error);
 462         log_info("\n");
 463
 464         /* Additional output if description is set */
 465         if (ts->description)
 466                 log_info(";%s", ts->description);
 467
 468         log_info("\n");
 469 }
 470
 471 static void sum_stat(struct io_stat *dst, struct io_stat *src, int nr)
 472 {
 473         double mean, S;
 474
 475         dst->min_val = min(dst->min_val, src->min_val);
 476         dst->max_val = max(dst->max_val, src->max_val);
 477         dst->samples += src->samples;
 478
 479         /*
 480          * Needs a new method for calculating stddev, we cannot just
 481          * average them we do below for nr > 1
 482          */
 483         if (nr == 1) {
 484                 mean = src->mean;
 485                 S = src->S;
 486         } else {
 487                 mean = ((src->mean * (double) (nr - 1))
 488                                 + dst->mean) / ((double) nr);
 489                 S = ((src->S * (double) (nr - 1)) + dst->S) / ((double) nr);
 490         }
 491
 492         dst->mean = mean;
 493         dst->S = S;
 494 }
 495
 496 void show_run_stats(void)
 497 {
 498         struct group_run_stats *runstats, *rs;
 499         struct thread_data *td;
 500         struct thread_stat *threadstats, *ts;
 501         int i, j, k, l, nr_ts, last_ts, idx;
 502         int kb_base_warned = 0;
 503
 504         runstats = malloc(sizeof(struct group_run_stats) * (groupid + 1));
 505
 506         for (i = 0; i < groupid + 1; i++) {
 507                 rs = &runstats[i];
 508
 509                 memset(rs, 0, sizeof(*rs));
 510                 rs->min_bw[0] = rs->min_run[0] = ~0UL;
 511                 rs->min_bw[1] = rs->min_run[1] = ~0UL;
 512         }
 513
 514         /*
 515          * find out how many threads stats we need. if group reporting isn't
 516          * enabled, it's one-per-td.
 517          */
 518         nr_ts = 0;
 519         last_ts = -1;
 520         for_each_td(td, i) {
 521                 if (!td->o.group_reporting) {
 522                         nr_ts++;
 523                         continue;
 524                 }
 525                 if (last_ts == td->groupid)
 526                         continue;
 527
 528                 last_ts = td->groupid;
 529                 nr_ts++;
 530         }
 531
 532         threadstats = malloc(nr_ts * sizeof(struct thread_stat));
 533
 534         for (i = 0; i < nr_ts; i++) {
 535                 ts = &threadstats[i];
 536
 537                 memset(ts, 0, sizeof(*ts));
 538                 for (j = 0; j <= DDIR_WRITE; j++) {
 539                         ts->lat_stat[j].min_val = -1UL;
 540                         ts->clat_stat[j].min_val = -1UL;
 541                         ts->slat_stat[j].min_val = -1UL;
 542                         ts->bw_stat[j].min_val = -1UL;
 543                 }
 544                 ts->groupid = -1;
 545         }
 546
 547         j = 0;
 548         last_ts = -1;
 549         idx = 0;
 550         for_each_td(td, i) {
 551                 if (idx && (!td->o.group_reporting ||
 552                     (td->o.group_reporting && last_ts != td->groupid))) {
 553                         idx = 0;
 554                         j++;
 555                 }
 556
 557                 last_ts = td->groupid;
 558
 559                 ts = &threadstats[j];
 560
 561                 idx++;
 562                 ts->members++;
 563
 564                 if (ts->groupid == -1) {
 565                         /*
 566                          * These are per-group shared already
 567                          */
 568                         ts->name = td->o.name;
 569                         ts->description = td->o.description;
 570                         ts->groupid = td->groupid;
 571
 572                         /*
 573                          * first pid in group, not very useful...
 574                          */
 575                         ts->pid = td->pid;
 576
 577                         ts->kb_base = td->o.kb_base;
 578                 } else if (ts->kb_base != td->o.kb_base && !kb_base_warned) {
 579                         log_info("fio: kb_base differs for jobs in group, using"
 580                                  " %u as the base\n", ts->kb_base);
 581                         kb_base_warned = 1;
 582                 }
 583
 584                 ts->continue_on_error = td->o.continue_on_error;
 585                 ts->total_err_count += td->total_err_count;
 586                 ts->first_error = td->first_error;
 587                 if (!ts->error) {
 588                         if (!td->error && td->o.continue_on_error &&
 589                             td->first_error) {
 590                                 ts->error = td->first_error;
 591                                 ts->verror = td->verror;
 592                         } else  if (td->error) {
 593                                 ts->error = td->error;
 594                                 ts->verror = td->verror;
 595                         }
 596                 }
 597
 598                 for (l = 0; l <= DDIR_WRITE; l++) {
 599                         sum_stat(&ts->clat_stat[l], &td->ts.clat_stat[l], idx);
 600                         sum_stat(&ts->slat_stat[l], &td->ts.slat_stat[l], idx);
 601                         sum_stat(&ts->lat_stat[l], &td->ts.lat_stat[l], idx);
 602                         sum_stat(&ts->bw_stat[l], &td->ts.bw_stat[l], idx);
 603
 604                         ts->stat_io_bytes[l] += td->ts.stat_io_bytes[l];
 605                         ts->io_bytes[l] += td->ts.io_bytes[l];
 606
 607                         if (ts->runtime[l] < td->ts.runtime[l])
 608                                 ts->runtime[l] = td->ts.runtime[l];
 609                 }
 610
 611                 ts->usr_time += td->ts.usr_time;
 612                 ts->sys_time += td->ts.sys_time;
 613                 ts->ctx += td->ts.ctx;
 614                 ts->majf += td->ts.majf;
 615                 ts->minf += td->ts.minf;
 616
 617                 for (k = 0; k < FIO_IO_U_MAP_NR; k++)
 618                         ts->io_u_map[k] += td->ts.io_u_map[k];
 619                 for (k = 0; k < FIO_IO_U_MAP_NR; k++)
 620                         ts->io_u_submit[k] += td->ts.io_u_submit[k];
 621                 for (k = 0; k < FIO_IO_U_MAP_NR; k++)
 622                         ts->io_u_complete[k] += td->ts.io_u_complete[k];
 623                 for (k = 0; k < FIO_IO_U_LAT_U_NR; k++)
 624                         ts->io_u_lat_u[k] += td->ts.io_u_lat_u[k];
 625                 for (k = 0; k < FIO_IO_U_LAT_M_NR; k++)
 626                         ts->io_u_lat_m[k] += td->ts.io_u_lat_m[k];
 627
 628
 629                 for (k = 0; k <= 2; k++) {
 630                         ts->total_io_u[k] += td->ts.total_io_u[k];
 631                         ts->short_io_u[k] += td->ts.short_io_u[k];
 632                 }
 633
 634                 ts->total_run_time += td->ts.total_run_time;
 635                 ts->total_submit += td->ts.total_submit;
 636                 ts->total_complete += td->ts.total_complete;
 637         }
 638
 639         for (i = 0; i < nr_ts; i++) {
 640                 unsigned long long bw;
 641
 642                 ts = &threadstats[i];
 643                 rs = &runstats[ts->groupid];
 644                 rs->kb_base = ts->kb_base;
 645
 646                 for (j = 0; j <= DDIR_WRITE; j++) {
 647                         if (!ts->runtime[j])
 648                                 continue;
 649                         if (ts->runtime[j] < rs->min_run[j] || !rs->min_run[j])
 650                                 rs->min_run[j] = ts->runtime[j];
 651                         if (ts->runtime[j] > rs->max_run[j])
 652                                 rs->max_run[j] = ts->runtime[j];
 653
 654                         bw = 0;
 655                         if (ts->runtime[j]) {
 656                                 unsigned long runt;
 657
 658                                 runt = ts->runtime[j];
 659                                 bw = ts->io_bytes[j] / runt;
 660                         }
 661                         if (bw < rs->min_bw[j])
 662                                 rs->min_bw[j] = bw;
 663                         if (bw > rs->max_bw[j])
 664                                 rs->max_bw[j] = bw;
 665
 666                         rs->io_kb[j] += ts->io_bytes[j] / rs->kb_base;
 667                 }
 668         }
 669
 670         for (i = 0; i < groupid + 1; i++) {
 671                 unsigned long max_run[2];
 672
 673                 rs = &runstats[i];
 674                 max_run[0] = rs->max_run[0];
 675                 max_run[1] = rs->max_run[1];
 676
 677                 if (rs->max_run[0])
 678                         rs->agg[0] = (rs->io_kb[0] * 1000) / max_run[0];
 679                 if (rs->max_run[1])
 680                         rs->agg[1] = (rs->io_kb[1] * 1000) / max_run[1];
 681         }
 682
 683         /*
 684          * don't overwrite last signal output
 685          */
 686         if (!terse_output)
 687                 log_info("\n");
 688
 689         for (i = 0; i < nr_ts; i++) {
 690                 ts = &threadstats[i];
 691                 rs = &runstats[ts->groupid];
 692
 693                 if (terse_output)
 694                         show_thread_status_terse(ts, rs);
 695                 else
 696                         show_thread_status(ts, rs);
 697         }
 698
 699         if (!terse_output) {
 700                 for (i = 0; i < groupid + 1; i++)
 701                         show_group_stats(&runstats[i], i);
 702
 703                 show_disk_util();
 704         }
 705
 706         free(runstats);
 707         free(threadstats);
 708 }
 709
 710 static inline void add_stat_sample(struct io_stat *is, unsigned long data)
 711 {
 712         double val = data;
 713         double delta;
 714
 715         if (data > is->max_val)
 716                 is->max_val = data;
 717         if (data < is->min_val)
 718                 is->min_val = data;
 719
 720         delta = val - is->mean;
 721         if (delta) {
 722                 is->mean += delta / (is->samples + 1.0);
 723                 is->S += delta * (val - is->mean);
 724         }
 725
 726         is->samples++;
 727 }
 728
 729 static void __add_log_sample(struct io_log *iolog, unsigned long val,
 730                              enum fio_ddir ddir, unsigned int bs,
 731                              unsigned long t)
 732 {
 733         const int nr_samples = iolog->nr_samples;
 734
 735         if (iolog->nr_samples == iolog->max_samples) {
 736                 int new_size = sizeof(struct io_sample) * iolog->max_samples*2;
 737
 738                 iolog->log = realloc(iolog->log, new_size);
 739                 iolog->max_samples <<= 1;
 740         }
 741
 742         iolog->log[nr_samples].val = val;
 743         iolog->log[nr_samples].time = t;
 744         iolog->log[nr_samples].ddir = ddir;
 745         iolog->log[nr_samples].bs = bs;
 746         iolog->nr_samples++;
 747 }
 748
 749 static void add_log_sample(struct thread_data *td, struct io_log *iolog,
 750                            unsigned long val, enum fio_ddir ddir,
 751                            unsigned int bs)
 752 {
 753         if (!ddir_rw(ddir))
 754                 return;
 755
 756         __add_log_sample(iolog, val, ddir, bs, mtime_since_now(&td->epoch));
 757 }
 758
 759 void add_agg_sample(unsigned long val, enum fio_ddir ddir, unsigned int bs)
 760 {
 761         struct io_log *iolog;
 762
 763         if (!ddir_rw(ddir))
 764                 return;
 765
 766         iolog = agg_io_log[ddir];
 767         __add_log_sample(iolog, val, ddir, bs, mtime_since_genesis());
 768 }
 769
 770 void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
 771                      unsigned long usec, unsigned int bs)
 772 {
 773         struct thread_stat *ts = &td->ts;
 774
 775         if (!ddir_rw(ddir))
 776                 return;
 777
 778         add_stat_sample(&ts->clat_stat[ddir], usec);
 779
 780         if (ts->clat_log)
 781                 add_log_sample(td, ts->clat_log, usec, ddir, bs);
 782 }
 783
 784 void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
 785                      unsigned long usec, unsigned int bs)
 786 {
 787         struct thread_stat *ts = &td->ts;
 788
 789         if (!ddir_rw(ddir))
 790                 return;
 791
 792         add_stat_sample(&ts->slat_stat[ddir], usec);
 793
 794         if (ts->slat_log)
 795                 add_log_sample(td, ts->slat_log, usec, ddir, bs);
 796 }
 797
 798 void add_lat_sample(struct thread_data *td, enum fio_ddir ddir,
 799                     unsigned long usec, unsigned int bs)
 800 {
 801         struct thread_stat *ts = &td->ts;
 802
 803         if (!ddir_rw(ddir))
 804                 return;
 805
 806         add_stat_sample(&ts->lat_stat[ddir], usec);
 807
 808         if (ts->lat_log)
 809                 add_log_sample(td, ts->lat_log, usec, ddir, bs);
 810 }
 811
 812 void add_bw_sample(struct thread_data *td, enum fio_ddir ddir, unsigned int bs,
 813                    struct timeval *t)
 814 {
 815         struct thread_stat *ts = &td->ts;
 816         unsigned long spent, rate;
 817
 818         if (!ddir_rw(ddir))
 819                 return;
 820
 821         spent = mtime_since(&ts->stat_sample_time[ddir], t);
 822         if (spent < td->o.bw_avg_time)
 823                 return;
 824
 825         rate = (td->this_io_bytes[ddir] - ts->stat_io_bytes[ddir]) *
 826                         1000 / spent / 1024;
 827         add_stat_sample(&ts->bw_stat[ddir], rate);
 828
 829         if (ts->bw_log)
 830                 add_log_sample(td, ts->bw_log, rate, ddir, bs);
 831
 832         fio_gettime(&ts->stat_sample_time[ddir], NULL);
 833         ts->stat_io_bytes[ddir] = td->this_io_bytes[ddir];
 834 }