One more fio_ddir fixup
[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{
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17 char postfix[] = { ' ', 'K', 'M', 'G', 'P', 'E' };
18 unsigned int thousand;
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19 char *buf;
20 int i;
21
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22 if (pow2)
23 thousand = 1024;
24 else
25 thousand = 1000;
26
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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) {
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37 if (i >= 1) {
38 buf[len] = postfix[i];
39 buf[len + 1] = '\0';
40 }
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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
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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
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82 if (n > 1.0)
83 *dev = sqrt(is->S / (n - 1.0));
ef9c5c40 84 else
4b43f54e 85 *dev = 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{
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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
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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
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116#define ts_total_io_u(ts) \
117 ((ts)->total_io_u[0] + (ts)->total_io_u[1])
118
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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;
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129 if (io_u_dist[i] < 0.1 && ts->io_u_map[i])
130 io_u_dist[i] = 0.1;
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131 }
132}
133
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134static void stat_calc_lat(struct thread_stat *ts, double *dst,
135 unsigned int *src, int nr)
2270890c
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136{
137 int i;
138
139 /*
140 * Do latency distribution calculations
141 */
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142 for (i = 0; i < nr; i++) {
143 dst[i] = (double) src[i] / (double) ts_total_io_u(ts);
144 dst[i] *= 100.0;
145 if (dst[i] < 0.01 && src[i])
146 dst[i] = 0.01;
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147 }
148}
149
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150static void stat_calc_lat_u(struct thread_stat *ts, double *io_u_lat)
151{
152 stat_calc_lat(ts, io_u_lat, ts->io_u_lat_u, FIO_IO_U_LAT_U_NR);
153}
154
155static void stat_calc_lat_m(struct thread_stat *ts, double *io_u_lat)
156{
157 stat_calc_lat(ts, io_u_lat, ts->io_u_lat_m, FIO_IO_U_LAT_M_NR);
158}
159
ea2accc5
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160static int usec_to_msec(unsigned long *min, unsigned long *max, double *mean,
161 double *dev)
162{
163 if (*min > 1000 && *max > 1000 && *mean > 1000.0 && *dev > 1000.0) {
164 *min /= 1000;
165 *max /= 1000;
166 *mean /= 1000.0;
167 *dev /= 1000.0;
168 return 0;
169 }
170
171 return 1;
172}
173
756867bd 174static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
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175 int ddir)
176{
3c9b60c1 177 const char *ddir_str[] = { "read ", "write" };
3c39a379 178 unsigned long min, max;
b3605062 179 unsigned long long bw, iops;
3c39a379 180 double mean, dev;
b3605062 181 char *io_p, *bw_p, *iops_p;
3c39a379 182
756867bd 183 if (!ts->runtime[ddir])
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184 return;
185
756867bd 186 bw = ts->io_bytes[ddir] / ts->runtime[ddir];
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187 iops = (1000 * ts->total_io_u[ddir]) / ts->runtime[ddir];
188 io_p = num2str(ts->io_bytes[ddir] >> 10, 6, 1000, 1);
189 bw_p = num2str(bw, 6, 1000, 1);
190 iops_p = num2str(iops, 6, 1, 0);
dbe1125e 191
6d86144d 192 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]);
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193
194 free(io_p);
195 free(bw_p);
b3605062 196 free(iops_p);
3c39a379 197
d85f5118
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198 if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev)) {
199 const char *base = "(usec)";
200
ea2accc5 201 if (!usec_to_msec(&min, &max, &mean, &dev))
d85f5118 202 base = "(msec)";
ea2accc5 203
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204 log_info(" slat %s: min=%5lu, max=%5lu, avg=%5.02f, stdev=%5.02f\n", base, min, max, mean, dev);
205 }
206 if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev)) {
207 const char *base = "(usec)";
208
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209 if (!usec_to_msec(&min, &max, &mean, &dev))
210 base = "(msec)";
211
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212 log_info(" clat %s: min=%5lu, max=%5lu, avg=%5.02f, stdev=%5.02f\n", base, min, max, mean, dev);
213 }
079ad09b 214 if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
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215 double p_of_agg;
216
217 p_of_agg = mean * 100 / (double) rs->agg[ddir];
6d86144d 218 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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219 }
220}
221
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222static void show_lat(double *io_u_lat, int nr, const char **ranges,
223 const char *msg)
224{
225 int new_line = 1, i, line = 0;
226
227 for (i = 0; i < nr; i++) {
228 if (io_u_lat[i] <= 0.0)
229 continue;
230 if (new_line) {
231 log_info(" lat (%s): ", msg);
232 new_line = 0;
233 line = 0;
234 }
235 if (line)
236 log_info(", ");
237 log_info("%s%3.2f%%", ranges[i], io_u_lat[i]);
238 line++;
239 if (line == 5)
240 new_line = 1;
241 }
242
243}
244
245static void show_lat_u(double *io_u_lat_u)
246{
247 const char *ranges[] = { "2=", "4=", "10=", "20=", "50=", "100=",
248 "250=", "500=", "750=", "1000=", };
249
250 show_lat(io_u_lat_u, FIO_IO_U_LAT_U_NR, ranges, "usec");
251}
252
253static void show_lat_m(double *io_u_lat_m)
254{
255 const char *ranges[] = { "2=", "4=", "10=", "20=", "50=", "100=",
256 "250=", "500=", "750=", "1000=", "2000=",
257 ">=2000=", };
258
259 show_lat(io_u_lat_m, FIO_IO_U_LAT_M_NR, ranges, "msec");
260}
261
262static void show_latencies(double *io_u_lat_u, double *io_u_lat_m)
263{
264 show_lat_u(io_u_lat_u);
265 show_lat_m(io_u_lat_m);
266 log_info("\n");
267}
268
756867bd 269static void show_thread_status(struct thread_stat *ts,
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270 struct group_run_stats *rs)
271{
272 double usr_cpu, sys_cpu;
69008999 273 unsigned long runtime;
71619dc2 274 double io_u_dist[FIO_IO_U_MAP_NR];
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275 double io_u_lat_u[FIO_IO_U_LAT_U_NR];
276 double io_u_lat_m[FIO_IO_U_LAT_M_NR];
3c39a379 277
756867bd 278 if (!(ts->io_bytes[0] + ts->io_bytes[1]))
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279 return;
280
756867bd 281 if (!ts->error)
6d86144d 282 log_info("%s: (groupid=%d, jobs=%d): err=%2d: pid=%d\n", ts->name, ts->groupid, ts->members, ts->error, ts->pid);
6d663077 283 else
6d86144d 284 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 285
7bdce1bd 286 if (ts->description)
6d86144d 287 log_info(" Description : [%s]\n", ts->description);
7bdce1bd 288
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289 if (ts->io_bytes[DDIR_READ])
290 show_ddir_status(rs, ts, DDIR_READ);
291 if (ts->io_bytes[DDIR_WRITE])
292 show_ddir_status(rs, ts, DDIR_WRITE);
3c39a379 293
756867bd 294 runtime = ts->total_run_time;
69008999 295 if (runtime) {
1e97cce9 296 double runt = (double) runtime;
3c39a379 297
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298 usr_cpu = (double) ts->usr_time * 100 / runt;
299 sys_cpu = (double) ts->sys_time * 100 / runt;
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300 } else {
301 usr_cpu = 0;
302 sys_cpu = 0;
303 }
304
6d86144d 305 log_info(" cpu : usr=%3.2f%%, sys=%3.2f%%, ctx=%lu\n", usr_cpu, sys_cpu, ts->ctx);
71619dc2 306
2270890c 307 stat_calc_dist(ts, io_u_dist);
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308 stat_calc_lat_u(ts, io_u_lat_u);
309 stat_calc_lat_m(ts, io_u_lat_m);
71619dc2 310
6d86144d 311 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]);
30061b97 312 log_info(" issued r/w: total=%lu/%lu, short=%lu/%lu\n", ts->total_io_u[0], ts->total_io_u[1], ts->short_io_u[0], ts->short_io_u[1]);
61697c37 313
04a0feae 314 show_latencies(io_u_lat_u, io_u_lat_m);
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315}
316
756867bd 317static void show_ddir_status_terse(struct thread_stat *ts,
c6ae0a5b
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318 struct group_run_stats *rs, int ddir)
319{
320 unsigned long min, max;
321 unsigned long long bw;
322 double mean, dev;
323
324 bw = 0;
756867bd
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325 if (ts->runtime[ddir])
326 bw = ts->io_bytes[ddir] / ts->runtime[ddir];
c6ae0a5b 327
6d86144d 328 log_info(";%llu;%llu;%lu", ts->io_bytes[ddir] >> 10, bw, ts->runtime[ddir]);
c6ae0a5b 329
079ad09b 330 if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
6d86144d 331 log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
c6ae0a5b 332 else
6d86144d 333 log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
c6ae0a5b 334
079ad09b 335 if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev))
6d86144d 336 log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
c6ae0a5b 337 else
6d86144d 338 log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
c6ae0a5b 339
079ad09b 340 if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
c6ae0a5b
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341 double p_of_agg;
342
343 p_of_agg = mean * 100 / (double) rs->agg[ddir];
6d86144d 344 log_info(";%lu;%lu;%f%%;%f;%f", min, max, p_of_agg, mean, dev);
c6ae0a5b 345 } else
6d86144d 346 log_info(";%lu;%lu;%f%%;%f;%f", 0UL, 0UL, 0.0, 0.0, 0.0);
c6ae0a5b
JA
347}
348
349
756867bd 350static void show_thread_status_terse(struct thread_stat *ts,
c6ae0a5b
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351 struct group_run_stats *rs)
352{
2270890c 353 double io_u_dist[FIO_IO_U_MAP_NR];
04a0feae
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354 double io_u_lat_u[FIO_IO_U_LAT_U_NR];
355 double io_u_lat_m[FIO_IO_U_LAT_M_NR];
c6ae0a5b 356 double usr_cpu, sys_cpu;
04a0feae 357 int i;
c6ae0a5b 358
6d86144d 359 log_info("%s;%d;%d", ts->name, ts->groupid, ts->error);
c6ae0a5b 360
756867bd
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361 show_ddir_status_terse(ts, rs, 0);
362 show_ddir_status_terse(ts, rs, 1);
c6ae0a5b 363
756867bd
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364 if (ts->total_run_time) {
365 double runt = (double) ts->total_run_time;
c6ae0a5b 366
756867bd
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367 usr_cpu = (double) ts->usr_time * 100 / runt;
368 sys_cpu = (double) ts->sys_time * 100 / runt;
c6ae0a5b
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369 } else {
370 usr_cpu = 0;
371 sys_cpu = 0;
372 }
373
6d86144d 374 log_info(";%f%%;%f%%;%lu", usr_cpu, sys_cpu, ts->ctx);
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375
376 stat_calc_dist(ts, io_u_dist);
04a0feae
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377 stat_calc_lat_u(ts, io_u_lat_u);
378 stat_calc_lat_m(ts, io_u_lat_m);
2270890c 379
6d86144d 380 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 381
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382 for (i = 0; i < FIO_IO_U_LAT_U_NR; i++)
383 log_info(";%3.2f%%", io_u_lat_u[i]);
384 for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
385 log_info(";%3.2f%%", io_u_lat_m[i]);
386 log_info("\n");
2270890c
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387
388 if (ts->description)
6d86144d 389 log_info(";%s", ts->description);
2270890c 390
6d86144d 391 log_info("\n");
756867bd
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392}
393
197574e4 394static void sum_stat(struct io_stat *dst, struct io_stat *src, int nr)
756867bd
JA
395{
396 double mean, S;
397
398 dst->min_val = min(dst->min_val, src->min_val);
399 dst->max_val = max(dst->max_val, src->max_val);
400 dst->samples += src->samples;
401
402 /*
403 * Needs a new method for calculating stddev, we cannot just
404 * average them we do below for nr > 1
405 */
406 if (nr == 1) {
407 mean = src->mean;
408 S = src->S;
409 } else {
c39cced6
JA
410 mean = ((src->mean * (double) (nr - 1)) + dst->mean) / ((double) nr);
411 S = ((src->S * (double) (nr - 1)) + dst->S) / ((double) nr);
756867bd
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412 }
413
414 dst->mean = mean;
415 dst->S = S;
416}
417
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418void show_run_stats(void)
419{
420 struct group_run_stats *runstats, *rs;
421 struct thread_data *td;
756867bd 422 struct thread_stat *threadstats, *ts;
197574e4 423 int i, j, k, l, nr_ts, last_ts, idx;
3c39a379
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424
425 runstats = malloc(sizeof(struct group_run_stats) * (groupid + 1));
426
427 for (i = 0; i < groupid + 1; i++) {
428 rs = &runstats[i];
429
430 memset(rs, 0, sizeof(*rs));
431 rs->min_bw[0] = rs->min_run[0] = ~0UL;
432 rs->min_bw[1] = rs->min_run[1] = ~0UL;
433 }
434
756867bd
JA
435 /*
436 * find out how many threads stats we need. if group reporting isn't
437 * enabled, it's one-per-td.
438 */
439 nr_ts = 0;
440 last_ts = -1;
441 for_each_td(td, i) {
2dc1bbeb 442 if (!td->o.group_reporting) {
756867bd
JA
443 nr_ts++;
444 continue;
445 }
446 if (last_ts == td->groupid)
447 continue;
448
449 last_ts = td->groupid;
450 nr_ts++;
451 }
452
453 threadstats = malloc(nr_ts * sizeof(struct thread_stat));
454
455 for (i = 0; i < nr_ts; i++) {
456 ts = &threadstats[i];
457
458 memset(ts, 0, sizeof(*ts));
de64df05 459 for (j = 0; j <= DDIR_WRITE; j++) {
197574e4
JA
460 ts->clat_stat[j].min_val = -1UL;
461 ts->slat_stat[j].min_val = -1UL;
462 ts->bw_stat[j].min_val = -1UL;
463 }
7abd0e3a 464 ts->groupid = -1;
756867bd
JA
465 }
466
467 j = 0;
468 last_ts = -1;
197574e4 469 idx = 0;
34572e28 470 for_each_td(td, i) {
2dc1bbeb
JA
471 if (idx && (!td->o.group_reporting ||
472 (td->o.group_reporting && last_ts != td->groupid))) {
7abd0e3a
JA
473 idx = 0;
474 j++;
475 }
476
477 last_ts = td->groupid;
478
756867bd
JA
479 ts = &threadstats[j];
480
197574e4 481 idx++;
6586ee89 482 ts->members++;
756867bd 483
7abd0e3a 484 if (ts->groupid == -1) {
2dc84ba7
JA
485 /*
486 * These are per-group shared already
487 */
2dc1bbeb
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488 ts->name = td->o.name;
489 ts->description = td->o.description;
756867bd 490 ts->groupid = td->groupid;
2dc84ba7
JA
491
492 /*
493 * first pid in group, not very useful...
494 */
756867bd 495 ts->pid = td->pid;
2dc84ba7
JA
496 }
497
498 if (td->error && !ts->error) {
499 ts->error = td->error;
756867bd
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500 ts->verror = td->verror;
501 }
502
de64df05 503 for (l = 0; l <= DDIR_WRITE; l++) {
197574e4
JA
504 sum_stat(&ts->clat_stat[l], &td->ts.clat_stat[l], idx);
505 sum_stat(&ts->slat_stat[l], &td->ts.slat_stat[l], idx);
506 sum_stat(&ts->bw_stat[l], &td->ts.bw_stat[l], idx);
756867bd 507
197574e4
JA
508 ts->stat_io_bytes[l] += td->ts.stat_io_bytes[l];
509 ts->io_bytes[l] += td->ts.io_bytes[l];
510
511 if (ts->runtime[l] < td->ts.runtime[l])
512 ts->runtime[l] = td->ts.runtime[l];
513 }
756867bd
JA
514
515 ts->usr_time += td->ts.usr_time;
516 ts->sys_time += td->ts.sys_time;
517 ts->ctx += td->ts.ctx;
518
519 for (k = 0; k < FIO_IO_U_MAP_NR; k++)
520 ts->io_u_map[k] += td->ts.io_u_map[k];
04a0feae
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521 for (k = 0; k < FIO_IO_U_LAT_U_NR; k++)
522 ts->io_u_lat_u[k] += td->ts.io_u_lat_u[k];
523 for (k = 0; k < FIO_IO_U_LAT_M_NR; k++)
524 ts->io_u_lat_m[k] += td->ts.io_u_lat_m[k];
525
756867bd 526
30061b97 527 for (k = 0; k <= DDIR_WRITE; k++) {
b3605062 528 ts->total_io_u[k] += td->ts.total_io_u[k];
30061b97
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529 ts->short_io_u[k] += td->ts.short_io_u[k];
530 }
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531
532 ts->total_run_time += td->ts.total_run_time;
756867bd
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533 }
534
535 for (i = 0; i < nr_ts; i++) {
94370ac4 536 unsigned long long bw;
3c39a379 537
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538 ts = &threadstats[i];
539 rs = &runstats[ts->groupid];
3c39a379 540
de64df05 541 for (j = 0; j <= DDIR_WRITE; j++) {
94370ac4
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542 if (!ts->runtime[j])
543 continue;
544 if (ts->runtime[j] < rs->min_run[j] || !rs->min_run[j])
545 rs->min_run[j] = ts->runtime[j];
546 if (ts->runtime[j] > rs->max_run[j])
547 rs->max_run[j] = ts->runtime[j];
548
549 bw = 0;
550 if (ts->runtime[j])
551 bw = ts->io_bytes[j] / (unsigned long long) ts->runtime[j];
552 if (bw < rs->min_bw[j])
553 rs->min_bw[j] = bw;
554 if (bw > rs->max_bw[j])
555 rs->max_bw[j] = bw;
556
557 rs->io_kb[j] += ts->io_bytes[j] >> 10;
558 }
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559 }
560
561 for (i = 0; i < groupid + 1; i++) {
562 rs = &runstats[i];
563
564 if (rs->max_run[0])
565 rs->agg[0] = (rs->io_kb[0]*1024) / rs->max_run[0];
566 if (rs->max_run[1])
567 rs->agg[1] = (rs->io_kb[1]*1024) / rs->max_run[1];
568 }
569
570 /*
571 * don't overwrite last signal output
572 */
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573 if (!terse_output)
574 printf("\n");
3c39a379 575
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576 for (i = 0; i < nr_ts; i++) {
577 ts = &threadstats[i];
578 rs = &runstats[ts->groupid];
3c39a379 579
c6ae0a5b 580 if (terse_output)
756867bd 581 show_thread_status_terse(ts, rs);
c6ae0a5b 582 else
756867bd 583 show_thread_status(ts, rs);
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584 }
585
c6ae0a5b
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586 if (!terse_output) {
587 for (i = 0; i < groupid + 1; i++)
588 show_group_stats(&runstats[i], i);
3c39a379 589
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590 show_disk_util();
591 }
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592
593 free(runstats);
756867bd 594 free(threadstats);
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595}
596
68704084 597static inline void add_stat_sample(struct io_stat *is, unsigned long data)
3c39a379 598{
68704084 599 double val = data;
6660cc67 600 double delta;
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601
602 if (data > is->max_val)
603 is->max_val = data;
604 if (data < is->min_val)
605 is->min_val = data;
606
607 delta = val - is->mean;
ef11d737
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608 if (delta) {
609 is->mean += delta / (is->samples + 1.0);
610 is->S += delta * (val - is->mean);
611 }
3c39a379 612
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613 is->samples++;
614}
615
bb3884d8
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616static void __add_log_sample(struct io_log *iolog, unsigned long val,
617 enum fio_ddir ddir, unsigned long time)
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618{
619 if (iolog->nr_samples == iolog->max_samples) {
620 int new_size = sizeof(struct io_sample) * iolog->max_samples*2;
621
622 iolog->log = realloc(iolog->log, new_size);
623 iolog->max_samples <<= 1;
624 }
625
626 iolog->log[iolog->nr_samples].val = val;
bb3884d8 627 iolog->log[iolog->nr_samples].time = time;
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628 iolog->log[iolog->nr_samples].ddir = ddir;
629 iolog->nr_samples++;
630}
631
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632static void add_log_sample(struct thread_data *td, struct io_log *iolog,
633 unsigned long val, enum fio_ddir ddir)
634{
635 __add_log_sample(iolog, val, ddir, mtime_since_now(&td->epoch));
636}
637
638void add_agg_sample(unsigned long val, enum fio_ddir ddir)
639{
640 struct io_log *iolog = agg_io_log[ddir];
641
642 __add_log_sample(iolog, val, ddir, mtime_since_genesis());
643}
644
1e97cce9 645void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
d85f5118 646 unsigned long usec)
3c39a379 647{
756867bd 648 struct thread_stat *ts = &td->ts;
079ad09b 649
d85f5118 650 add_stat_sample(&ts->clat_stat[ddir], usec);
3c39a379 651
079ad09b 652 if (ts->clat_log)
d85f5118 653 add_log_sample(td, ts->clat_log, usec, ddir);
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654}
655
1e97cce9 656void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
d85f5118 657 unsigned long usec)
3c39a379 658{
756867bd 659 struct thread_stat *ts = &td->ts;
079ad09b 660
d85f5118 661 add_stat_sample(&ts->slat_stat[ddir], usec);
3c39a379 662
079ad09b 663 if (ts->slat_log)
d85f5118 664 add_log_sample(td, ts->slat_log, usec, ddir);
3c39a379
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665}
666
1e97cce9
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667void add_bw_sample(struct thread_data *td, enum fio_ddir ddir,
668 struct timeval *t)
3c39a379 669{
756867bd 670 struct thread_stat *ts = &td->ts;
079ad09b 671 unsigned long spent = mtime_since(&ts->stat_sample_time[ddir], t);
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672 unsigned long rate;
673
2dc1bbeb 674 if (spent < td->o.bw_avg_time)
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675 return;
676
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677 rate = (td->this_io_bytes[ddir] - ts->stat_io_bytes[ddir]) / spent;
678 add_stat_sample(&ts->bw_stat[ddir], rate);
3c39a379 679
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680 if (ts->bw_log)
681 add_log_sample(td, ts->bw_log, rate, ddir);
3c39a379 682
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683 fio_gettime(&ts->stat_sample_time[ddir], NULL);
684 ts->stat_io_bytes[ddir] = td->this_io_bytes[ddir];
3c39a379 685}