pre_read fixes
[fio.git] / 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 }