Fio 1.29-rc1
[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 #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 }