Seperate disk util code out of fio.c
[fio.git] / stat.c
CommitLineData
3c39a379
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1#include <stdio.h>
2#include <string.h>
3#include <sys/time.h>
4#include <sys/types.h>
5c4e1dbc 5#include <sys/stat.h>
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6#include <dirent.h>
7#include <libgen.h>
8#include <math.h>
9
10#include "fio.h"
3c39a379 11
dbe1125e 12/*
34403fb1 13 * Cheesy number->string conversion, complete with carry rounding error.
dbe1125e 14 */
b3605062 15static char *num2str(unsigned long num, int maxlen, int base, int pow2)
dbe1125e 16{
b3605062
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17 char postfix[] = { ' ', 'K', 'M', 'G', 'P', 'E' };
18 unsigned int thousand;
dbe1125e
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19 char *buf;
20 int i;
21
b3605062
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22 if (pow2)
23 thousand = 1024;
24 else
25 thousand = 1000;
26
dbe1125e
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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) {
b3605062
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37 if (i >= 1) {
38 buf[len] = postfix[i];
39 buf[len + 1] = '\0';
40 }
dbe1125e
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41 return buf;
42 }
43
44 if ((num % thousand) >= (thousand / 2))
45 carry = 1;
46
47 num /= thousand;
48 num += carry;
49 i++;
f3502ba2 50 } while (i <= 5);
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51
52 return buf;
53}
54
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55void update_rusage_stat(struct thread_data *td)
56{
756867bd 57 struct thread_stat *ts = &td->ts;
3c39a379 58
079ad09b
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59 getrusage(RUSAGE_SELF, &ts->ru_end);
60
61 ts->usr_time += mtime_since(&ts->ru_start.ru_utime, &ts->ru_end.ru_utime);
62 ts->sys_time += mtime_since(&ts->ru_start.ru_stime, &ts->ru_end.ru_stime);
63 ts->ctx += ts->ru_end.ru_nvcsw + ts->ru_end.ru_nivcsw - (ts->ru_start.ru_nvcsw + ts->ru_start.ru_nivcsw);
3c39a379 64
079ad09b 65 memcpy(&ts->ru_start, &ts->ru_end, sizeof(ts->ru_end));
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66}
67
68static int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max,
69 double *mean, double *dev)
70{
68704084 71 double n = is->samples;
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72
73 if (is->samples == 0)
74 return 0;
75
76 *min = is->min_val;
77 *max = is->max_val;
78
79 n = (double) is->samples;
68704084 80 *mean = is->mean;
e6d276f2 81
68704084
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82 if (n > 1.0)
83 *dev = sqrt(is->S / (n - 1.0));
ef9c5c40 84 else
68704084 85 *dev = -1.0;
ef9c5c40 86
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87 return 1;
88}
89
90static void show_group_stats(struct group_run_stats *rs, int id)
91{
dbe1125e
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92 char *p1, *p2, *p3, *p4;
93 const char *ddir_str[] = { " READ", " WRITE" };
94 int i;
95
6d86144d 96 log_info("\nRun status group %d (all jobs):\n", id);
3c39a379 97
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98 for (i = 0; i <= DDIR_WRITE; i++) {
99 if (!rs->max_run[i])
100 continue;
101
b3605062
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102 p1 = num2str(rs->io_kb[i], 6, 1000, 1);
103 p2 = num2str(rs->agg[i], 6, 1000, 1);
104 p3 = num2str(rs->min_bw[i], 6, 1000, 1);
105 p4 = num2str(rs->max_bw[i], 6, 1000, 1);
dbe1125e 106
6d86144d 107 log_info("%s: io=%siB, aggrb=%siB/s, minb=%siB/s, maxb=%siB/s, mint=%llumsec, maxt=%llumsec\n", ddir_str[i], p1, p2, p3, p4, rs->min_run[i], rs->max_run[i]);
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108
109 free(p1);
110 free(p2);
111 free(p3);
112 free(p4);
113 }
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114}
115
b3605062
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116#define ts_total_io_u(ts) \
117 ((ts)->total_io_u[0] + (ts)->total_io_u[1])
118
2270890c
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119static void stat_calc_dist(struct thread_stat *ts, double *io_u_dist)
120{
121 int i;
122
123 /*
124 * Do depth distribution calculations
125 */
126 for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
b3605062 127 io_u_dist[i] = (double) ts->io_u_map[i] / (double) ts_total_io_u(ts);
2270890c 128 io_u_dist[i] *= 100.0;
d0f62ba3
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129 if (io_u_dist[i] < 0.1 && ts->io_u_map[i])
130 io_u_dist[i] = 0.1;
2270890c
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131 }
132}
133
134static void stat_calc_lat(struct thread_stat *ts, double *io_u_lat)
135{
136 int i;
137
138 /*
139 * Do latency distribution calculations
140 */
141 for (i = 0; i < FIO_IO_U_LAT_NR; i++) {
b3605062 142 io_u_lat[i] = (double) ts->io_u_lat[i] / (double) ts_total_io_u(ts);
2270890c 143 io_u_lat[i] *= 100.0;
d0f62ba3
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144 if (io_u_lat[i] < 0.01 && ts->io_u_lat[i])
145 io_u_lat[i] = 0.01;
2270890c
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146 }
147}
148
756867bd 149static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
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150 int ddir)
151{
3c9b60c1 152 const char *ddir_str[] = { "read ", "write" };
3c39a379 153 unsigned long min, max;
b3605062 154 unsigned long long bw, iops;
3c39a379 155 double mean, dev;
b3605062 156 char *io_p, *bw_p, *iops_p;
3c39a379 157
756867bd 158 if (!ts->runtime[ddir])
3c39a379
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159 return;
160
756867bd 161 bw = ts->io_bytes[ddir] / ts->runtime[ddir];
b3605062
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162 iops = (1000 * ts->total_io_u[ddir]) / ts->runtime[ddir];
163 io_p = num2str(ts->io_bytes[ddir] >> 10, 6, 1000, 1);
164 bw_p = num2str(bw, 6, 1000, 1);
165 iops_p = num2str(iops, 6, 1, 0);
dbe1125e 166
6d86144d 167 log_info(" %s: io=%siB, bw=%siB/s, iops=%s, runt=%6lumsec\n", ddir_str[ddir], io_p, bw_p, iops_p, ts->runtime[ddir]);
dbe1125e
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168
169 free(io_p);
170 free(bw_p);
b3605062 171 free(iops_p);
3c39a379 172
079ad09b 173 if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
6d86144d 174 log_info(" slat (msec): min=%5lu, max=%5lu, avg=%5.02f, stdev=%5.02f\n", min, max, mean, dev);
3c39a379 175
079ad09b 176 if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev))
6d86144d 177 log_info(" clat (msec): min=%5lu, max=%5lu, avg=%5.02f, stdev=%5.02f\n", min, max, mean, dev);
3c39a379 178
079ad09b 179 if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
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180 double p_of_agg;
181
182 p_of_agg = mean * 100 / (double) rs->agg[ddir];
6d86144d 183 log_info(" bw (KiB/s) : min=%5lu, max=%5lu, per=%3.2f%%, avg=%5.02f, stdev=%5.02f\n", min, max, p_of_agg, mean, dev);
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184 }
185}
186
756867bd 187static void show_thread_status(struct thread_stat *ts,
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188 struct group_run_stats *rs)
189{
190 double usr_cpu, sys_cpu;
69008999 191 unsigned long runtime;
71619dc2 192 double io_u_dist[FIO_IO_U_MAP_NR];
ec118304 193 double io_u_lat[FIO_IO_U_LAT_NR];
3c39a379 194
756867bd 195 if (!(ts->io_bytes[0] + ts->io_bytes[1]))
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196 return;
197
756867bd 198 if (!ts->error)
6d86144d 199 log_info("%s: (groupid=%d, jobs=%d): err=%2d: pid=%d\n", ts->name, ts->groupid, ts->members, ts->error, ts->pid);
6d663077 200 else
6d86144d 201 log_info("%s: (groupid=%d, jobs=%d): err=%2d (%s): pid=%d\n", ts->name, ts->groupid, ts->members, ts->error, ts->verror, ts->pid);
3c39a379 202
7bdce1bd 203 if (ts->description)
6d86144d 204 log_info(" Description : [%s]\n", ts->description);
7bdce1bd 205
756867bd
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206 if (ts->io_bytes[DDIR_READ])
207 show_ddir_status(rs, ts, DDIR_READ);
208 if (ts->io_bytes[DDIR_WRITE])
209 show_ddir_status(rs, ts, DDIR_WRITE);
3c39a379 210
756867bd 211 runtime = ts->total_run_time;
69008999 212 if (runtime) {
1e97cce9 213 double runt = (double) runtime;
3c39a379 214
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215 usr_cpu = (double) ts->usr_time * 100 / runt;
216 sys_cpu = (double) ts->sys_time * 100 / runt;
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217 } else {
218 usr_cpu = 0;
219 sys_cpu = 0;
220 }
221
6d86144d 222 log_info(" cpu : usr=%3.2f%%, sys=%3.2f%%, ctx=%lu\n", usr_cpu, sys_cpu, ts->ctx);
71619dc2 223
2270890c
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224 stat_calc_dist(ts, io_u_dist);
225 stat_calc_lat(ts, io_u_lat);
71619dc2 226
6d86144d 227 log_info(" IO depths : 1=%3.1f%%, 2=%3.1f%%, 4=%3.1f%%, 8=%3.1f%%, 16=%3.1f%%, 32=%3.1f%%, >=64=%3.1f%%\n", io_u_dist[0], io_u_dist[1], io_u_dist[2], io_u_dist[3], io_u_dist[4], io_u_dist[5], io_u_dist[6]);
61697c37 228
d0f62ba3
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229 log_info(" lat (msec): 2=%3.2f%%, 4=%3.2f%%, 10=%3.2f%%, 20=%3.2f%%, 50=%3.2f%%, 100=%3.2f%%\n", io_u_lat[0], io_u_lat[1], io_u_lat[2], io_u_lat[3], io_u_lat[4], io_u_lat[5]);
230 log_info(" lat (msec): 250=%3.2f%%, 500=%3.2f%%, 750=%3.2f%%, 1000=%3.2f%%, >=2000=%3.2f%%\n", io_u_lat[6], io_u_lat[7], io_u_lat[8], io_u_lat[9], io_u_lat[10]);
3c39a379
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231}
232
756867bd 233static void show_ddir_status_terse(struct thread_stat *ts,
c6ae0a5b
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234 struct group_run_stats *rs, int ddir)
235{
236 unsigned long min, max;
237 unsigned long long bw;
238 double mean, dev;
239
240 bw = 0;
756867bd
JA
241 if (ts->runtime[ddir])
242 bw = ts->io_bytes[ddir] / ts->runtime[ddir];
c6ae0a5b 243
6d86144d 244 log_info(";%llu;%llu;%lu", ts->io_bytes[ddir] >> 10, bw, ts->runtime[ddir]);
c6ae0a5b 245
079ad09b 246 if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
6d86144d 247 log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
c6ae0a5b 248 else
6d86144d 249 log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
c6ae0a5b 250
079ad09b 251 if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev))
6d86144d 252 log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
c6ae0a5b 253 else
6d86144d 254 log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
c6ae0a5b 255
079ad09b 256 if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
c6ae0a5b
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257 double p_of_agg;
258
259 p_of_agg = mean * 100 / (double) rs->agg[ddir];
6d86144d 260 log_info(";%lu;%lu;%f%%;%f;%f", min, max, p_of_agg, mean, dev);
c6ae0a5b 261 } else
6d86144d 262 log_info(";%lu;%lu;%f%%;%f;%f", 0UL, 0UL, 0.0, 0.0, 0.0);
c6ae0a5b
JA
263}
264
265
756867bd 266static void show_thread_status_terse(struct thread_stat *ts,
c6ae0a5b
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267 struct group_run_stats *rs)
268{
2270890c
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269 double io_u_dist[FIO_IO_U_MAP_NR];
270 double io_u_lat[FIO_IO_U_LAT_NR];
c6ae0a5b
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271 double usr_cpu, sys_cpu;
272
6d86144d 273 log_info("%s;%d;%d", ts->name, ts->groupid, ts->error);
c6ae0a5b 274
756867bd
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275 show_ddir_status_terse(ts, rs, 0);
276 show_ddir_status_terse(ts, rs, 1);
c6ae0a5b 277
756867bd
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278 if (ts->total_run_time) {
279 double runt = (double) ts->total_run_time;
c6ae0a5b 280
756867bd
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281 usr_cpu = (double) ts->usr_time * 100 / runt;
282 sys_cpu = (double) ts->sys_time * 100 / runt;
c6ae0a5b
JA
283 } else {
284 usr_cpu = 0;
285 sys_cpu = 0;
286 }
287
6d86144d 288 log_info(";%f%%;%f%%;%lu", usr_cpu, sys_cpu, ts->ctx);
2270890c
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289
290 stat_calc_dist(ts, io_u_dist);
291 stat_calc_lat(ts, io_u_lat);
292
6d86144d 293 log_info(";%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%", io_u_dist[0], io_u_dist[1], io_u_dist[2], io_u_dist[3], io_u_dist[4], io_u_dist[5], io_u_dist[6]);
2270890c 294
d0f62ba3
JA
295 log_info(";%3.2f%%;%3.2f%%;%3.2f%%;%3.2f%%;%3.2f%%;%3.2f%%\n", io_u_lat[0], io_u_lat[1], io_u_lat[2], io_u_lat[3], io_u_lat[4], io_u_lat[5]);
296 log_info(";%3.2f%%;%3.2f%%;%3.2f%%;%3.2f%%;%3.2f%%", io_u_lat[6], io_u_lat[7], io_u_lat[8], io_u_lat[9], io_u_lat[10]);
2270890c
JA
297
298 if (ts->description)
6d86144d 299 log_info(";%s", ts->description);
2270890c 300
6d86144d 301 log_info("\n");
756867bd
JA
302}
303
197574e4 304static void sum_stat(struct io_stat *dst, struct io_stat *src, int nr)
756867bd
JA
305{
306 double mean, S;
307
308 dst->min_val = min(dst->min_val, src->min_val);
309 dst->max_val = max(dst->max_val, src->max_val);
310 dst->samples += src->samples;
311
312 /*
313 * Needs a new method for calculating stddev, we cannot just
314 * average them we do below for nr > 1
315 */
316 if (nr == 1) {
317 mean = src->mean;
318 S = src->S;
319 } else {
c39cced6
JA
320 mean = ((src->mean * (double) (nr - 1)) + dst->mean) / ((double) nr);
321 S = ((src->S * (double) (nr - 1)) + dst->S) / ((double) nr);
756867bd
JA
322 }
323
324 dst->mean = mean;
325 dst->S = S;
326}
327
3c39a379
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328void show_run_stats(void)
329{
330 struct group_run_stats *runstats, *rs;
331 struct thread_data *td;
756867bd 332 struct thread_stat *threadstats, *ts;
197574e4 333 int i, j, k, l, nr_ts, last_ts, idx;
3c39a379
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334
335 runstats = malloc(sizeof(struct group_run_stats) * (groupid + 1));
336
337 for (i = 0; i < groupid + 1; i++) {
338 rs = &runstats[i];
339
340 memset(rs, 0, sizeof(*rs));
341 rs->min_bw[0] = rs->min_run[0] = ~0UL;
342 rs->min_bw[1] = rs->min_run[1] = ~0UL;
343 }
344
756867bd
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345 /*
346 * find out how many threads stats we need. if group reporting isn't
347 * enabled, it's one-per-td.
348 */
349 nr_ts = 0;
350 last_ts = -1;
351 for_each_td(td, i) {
2dc1bbeb 352 if (!td->o.group_reporting) {
756867bd
JA
353 nr_ts++;
354 continue;
355 }
356 if (last_ts == td->groupid)
357 continue;
358
359 last_ts = td->groupid;
360 nr_ts++;
361 }
362
363 threadstats = malloc(nr_ts * sizeof(struct thread_stat));
364
365 for (i = 0; i < nr_ts; i++) {
366 ts = &threadstats[i];
367
368 memset(ts, 0, sizeof(*ts));
de64df05 369 for (j = 0; j <= DDIR_WRITE; j++) {
197574e4
JA
370 ts->clat_stat[j].min_val = -1UL;
371 ts->slat_stat[j].min_val = -1UL;
372 ts->bw_stat[j].min_val = -1UL;
373 }
7abd0e3a 374 ts->groupid = -1;
756867bd
JA
375 }
376
377 j = 0;
378 last_ts = -1;
197574e4 379 idx = 0;
34572e28 380 for_each_td(td, i) {
2dc1bbeb
JA
381 if (idx && (!td->o.group_reporting ||
382 (td->o.group_reporting && last_ts != td->groupid))) {
7abd0e3a
JA
383 idx = 0;
384 j++;
385 }
386
387 last_ts = td->groupid;
388
756867bd
JA
389 ts = &threadstats[j];
390
197574e4 391 idx++;
6586ee89 392 ts->members++;
756867bd 393
7abd0e3a 394 if (ts->groupid == -1) {
2dc84ba7
JA
395 /*
396 * These are per-group shared already
397 */
2dc1bbeb
JA
398 ts->name = td->o.name;
399 ts->description = td->o.description;
756867bd 400 ts->groupid = td->groupid;
2dc84ba7
JA
401
402 /*
403 * first pid in group, not very useful...
404 */
756867bd 405 ts->pid = td->pid;
2dc84ba7
JA
406 }
407
408 if (td->error && !ts->error) {
409 ts->error = td->error;
756867bd
JA
410 ts->verror = td->verror;
411 }
412
de64df05 413 for (l = 0; l <= DDIR_WRITE; l++) {
197574e4
JA
414 sum_stat(&ts->clat_stat[l], &td->ts.clat_stat[l], idx);
415 sum_stat(&ts->slat_stat[l], &td->ts.slat_stat[l], idx);
416 sum_stat(&ts->bw_stat[l], &td->ts.bw_stat[l], idx);
756867bd 417
197574e4
JA
418 ts->stat_io_bytes[l] += td->ts.stat_io_bytes[l];
419 ts->io_bytes[l] += td->ts.io_bytes[l];
420
421 if (ts->runtime[l] < td->ts.runtime[l])
422 ts->runtime[l] = td->ts.runtime[l];
423 }
756867bd
JA
424
425 ts->usr_time += td->ts.usr_time;
426 ts->sys_time += td->ts.sys_time;
427 ts->ctx += td->ts.ctx;
428
429 for (k = 0; k < FIO_IO_U_MAP_NR; k++)
430 ts->io_u_map[k] += td->ts.io_u_map[k];
431 for (k = 0; k < FIO_IO_U_LAT_NR; k++)
432 ts->io_u_lat[k] += td->ts.io_u_lat[k];
433
b3605062
JA
434 for (k = 0; k <= DDIR_WRITE; k++)
435 ts->total_io_u[k] += td->ts.total_io_u[k];
756867bd
JA
436
437 ts->total_run_time += td->ts.total_run_time;
756867bd
JA
438 }
439
440 for (i = 0; i < nr_ts; i++) {
94370ac4 441 unsigned long long bw;
3c39a379 442
756867bd
JA
443 ts = &threadstats[i];
444 rs = &runstats[ts->groupid];
3c39a379 445
de64df05 446 for (j = 0; j <= DDIR_WRITE; j++) {
94370ac4
JA
447 if (!ts->runtime[j])
448 continue;
449 if (ts->runtime[j] < rs->min_run[j] || !rs->min_run[j])
450 rs->min_run[j] = ts->runtime[j];
451 if (ts->runtime[j] > rs->max_run[j])
452 rs->max_run[j] = ts->runtime[j];
453
454 bw = 0;
455 if (ts->runtime[j])
456 bw = ts->io_bytes[j] / (unsigned long long) ts->runtime[j];
457 if (bw < rs->min_bw[j])
458 rs->min_bw[j] = bw;
459 if (bw > rs->max_bw[j])
460 rs->max_bw[j] = bw;
461
462 rs->io_kb[j] += ts->io_bytes[j] >> 10;
463 }
3c39a379
JA
464 }
465
466 for (i = 0; i < groupid + 1; i++) {
467 rs = &runstats[i];
468
469 if (rs->max_run[0])
470 rs->agg[0] = (rs->io_kb[0]*1024) / rs->max_run[0];
471 if (rs->max_run[1])
472 rs->agg[1] = (rs->io_kb[1]*1024) / rs->max_run[1];
473 }
474
475 /*
476 * don't overwrite last signal output
477 */
c6ae0a5b
JA
478 if (!terse_output)
479 printf("\n");
3c39a379 480
756867bd
JA
481 for (i = 0; i < nr_ts; i++) {
482 ts = &threadstats[i];
483 rs = &runstats[ts->groupid];
3c39a379 484
c6ae0a5b 485 if (terse_output)
756867bd 486 show_thread_status_terse(ts, rs);
c6ae0a5b 487 else
756867bd 488 show_thread_status(ts, rs);
3c39a379
JA
489 }
490
c6ae0a5b
JA
491 if (!terse_output) {
492 for (i = 0; i < groupid + 1; i++)
493 show_group_stats(&runstats[i], i);
3c39a379 494
c6ae0a5b
JA
495 show_disk_util();
496 }
eecf272f
JA
497
498 free(runstats);
756867bd 499 free(threadstats);
3c39a379
JA
500}
501
68704084 502static inline void add_stat_sample(struct io_stat *is, unsigned long data)
3c39a379 503{
68704084 504 double val = data;
6660cc67 505 double delta;
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506
507 if (data > is->max_val)
508 is->max_val = data;
509 if (data < is->min_val)
510 is->min_val = data;
511
512 delta = val - is->mean;
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513 if (delta) {
514 is->mean += delta / (is->samples + 1.0);
515 is->S += delta * (val - is->mean);
516 }
3c39a379 517
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518 is->samples++;
519}
520
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521static void __add_log_sample(struct io_log *iolog, unsigned long val,
522 enum fio_ddir ddir, unsigned long time)
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523{
524 if (iolog->nr_samples == iolog->max_samples) {
525 int new_size = sizeof(struct io_sample) * iolog->max_samples*2;
526
527 iolog->log = realloc(iolog->log, new_size);
528 iolog->max_samples <<= 1;
529 }
530
531 iolog->log[iolog->nr_samples].val = val;
bb3884d8 532 iolog->log[iolog->nr_samples].time = time;
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533 iolog->log[iolog->nr_samples].ddir = ddir;
534 iolog->nr_samples++;
535}
536
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537static void add_log_sample(struct thread_data *td, struct io_log *iolog,
538 unsigned long val, enum fio_ddir ddir)
539{
540 __add_log_sample(iolog, val, ddir, mtime_since_now(&td->epoch));
541}
542
543void add_agg_sample(unsigned long val, enum fio_ddir ddir)
544{
545 struct io_log *iolog = agg_io_log[ddir];
546
547 __add_log_sample(iolog, val, ddir, mtime_since_genesis());
548}
549
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550void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
551 unsigned long msec)
3c39a379 552{
756867bd 553 struct thread_stat *ts = &td->ts;
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554
555 add_stat_sample(&ts->clat_stat[ddir], msec);
3c39a379 556
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557 if (ts->clat_log)
558 add_log_sample(td, ts->clat_log, msec, ddir);
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559}
560
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561void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
562 unsigned long msec)
3c39a379 563{
756867bd 564 struct thread_stat *ts = &td->ts;
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565
566 add_stat_sample(&ts->slat_stat[ddir], msec);
3c39a379 567
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568 if (ts->slat_log)
569 add_log_sample(td, ts->slat_log, msec, ddir);
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570}
571
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572void add_bw_sample(struct thread_data *td, enum fio_ddir ddir,
573 struct timeval *t)
3c39a379 574{
756867bd 575 struct thread_stat *ts = &td->ts;
079ad09b 576 unsigned long spent = mtime_since(&ts->stat_sample_time[ddir], t);
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577 unsigned long rate;
578
2dc1bbeb 579 if (spent < td->o.bw_avg_time)
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580 return;
581
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582 rate = (td->this_io_bytes[ddir] - ts->stat_io_bytes[ddir]) / spent;
583 add_stat_sample(&ts->bw_stat[ddir], rate);
3c39a379 584
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585 if (ts->bw_log)
586 add_log_sample(td, ts->bw_log, rate, ddir);
3c39a379 587
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588 fio_gettime(&ts->stat_sample_time[ddir], NULL);
589 ts->stat_io_bytes[ddir] = td->this_io_bytes[ddir];
3c39a379 590}