12 static struct itimerval itimer;
13 static struct list_head disk_list = LIST_HEAD_INIT(disk_list);
14 static dev_t last_dev;
17 * Cheasy number->string conversion, complete with carry rounding error.
19 static char *num2str(unsigned long num, int maxlen, int base)
22 * could be passed in for 10^3 base, but every caller expects
23 * 2^10 base right now.
25 const unsigned int thousand = 1024;
26 char postfix[] = { 'K', 'M', 'G', 'P', 'E' };
32 for (i = 0; base > 1; i++)
38 len = sprintf(buf, "%'lu", num);
40 buf[len] = postfix[i];
45 if ((num % thousand) >= (thousand / 2))
56 static int get_io_ticks(struct disk_util *du, struct disk_util_stat *dus)
63 f = fopen(du->path, "r");
67 p = fgets(line, sizeof(line), f);
73 if (sscanf(p, "%u %u %llu %u %u %u %llu %u %u %u %u\n", &dus->ios[0], &dus->merges[0], &dus->sectors[0], &dus->ticks[0], &dus->ios[1], &dus->merges[1], &dus->sectors[1], &dus->ticks[1], &in_flight, &dus->io_ticks, &dus->time_in_queue) != 11) {
82 static void update_io_tick_disk(struct disk_util *du)
84 struct disk_util_stat __dus, *dus, *ldus;
87 if (get_io_ticks(du, &__dus))
93 dus->sectors[0] += (__dus.sectors[0] - ldus->sectors[0]);
94 dus->sectors[1] += (__dus.sectors[1] - ldus->sectors[1]);
95 dus->ios[0] += (__dus.ios[0] - ldus->ios[0]);
96 dus->ios[1] += (__dus.ios[1] - ldus->ios[1]);
97 dus->merges[0] += (__dus.merges[0] - ldus->merges[0]);
98 dus->merges[1] += (__dus.merges[1] - ldus->merges[1]);
99 dus->ticks[0] += (__dus.ticks[0] - ldus->ticks[0]);
100 dus->ticks[1] += (__dus.ticks[1] - ldus->ticks[1]);
101 dus->io_ticks += (__dus.io_ticks - ldus->io_ticks);
102 dus->time_in_queue += (__dus.time_in_queue - ldus->time_in_queue);
104 fio_gettime(&t, NULL);
105 du->msec += mtime_since(&du->time, &t);
106 memcpy(&du->time, &t, sizeof(t));
107 memcpy(ldus, &__dus, sizeof(__dus));
110 void update_io_ticks(void)
112 struct list_head *entry;
113 struct disk_util *du;
115 list_for_each(entry, &disk_list) {
116 du = list_entry(entry, struct disk_util, list);
117 update_io_tick_disk(du);
121 static int disk_util_exists(dev_t dev)
123 struct list_head *entry;
124 struct disk_util *du;
126 list_for_each(entry, &disk_list) {
127 du = list_entry(entry, struct disk_util, list);
136 static void disk_util_add(dev_t dev, char *path)
138 struct disk_util *du, *__du;
139 struct list_head *entry;
141 du = malloc(sizeof(*du));
142 memset(du, 0, sizeof(*du));
143 INIT_LIST_HEAD(&du->list);
144 sprintf(du->path, "%s/stat", path);
145 du->name = strdup(basename(path));
148 list_for_each(entry, &disk_list) {
149 __du = list_entry(entry, struct disk_util, list);
151 if (!strcmp(du->name, __du->name)) {
158 fio_gettime(&du->time, NULL);
159 get_io_ticks(du, &du->last_dus);
161 list_add_tail(&du->list, &disk_list);
164 static int check_dev_match(dev_t dev, char *path)
166 unsigned int major, minor;
170 f = fopen(path, "r");
176 p = fgets(line, sizeof(line), f);
182 if (sscanf(p, "%u:%u", &major, &minor) != 2) {
187 if (((major << 8) | minor) == dev) {
196 static int find_block_dir(dev_t dev, char *path)
207 while ((dir = readdir(D)) != NULL) {
210 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
213 sprintf(full_path, "%s/%s", path, dir->d_name);
215 if (!strcmp(dir->d_name, "dev")) {
216 if (!check_dev_match(dev, full_path)) {
222 if (lstat(full_path, &st) == -1) {
227 if (!S_ISDIR(st.st_mode) || S_ISLNK(st.st_mode))
230 found = find_block_dir(dev, full_path);
232 strcpy(path, full_path);
241 void init_disk_util(struct thread_data *td)
245 char foo[PATH_MAX], tmp[PATH_MAX];
249 if (!td->do_disk_util || (td->io_ops->flags & FIO_DISKLESSIO))
253 * Just use the same file, they are on the same device.
256 if (!stat(f->file_name, &st)) {
257 if (S_ISBLK(st.st_mode))
263 * must be a file, open "." in that path
265 strncpy(foo, f->file_name, PATH_MAX - 1);
268 perror("disk util stat");
275 if (disk_util_exists(dev))
279 * for an fs without a device, we will repeatedly stat through
280 * sysfs which can take oodles of time for thousands of files. so
281 * cache the last lookup and compare with that before going through
289 sprintf(foo, "/sys/block");
290 if (!find_block_dir(dev, foo))
294 * If there's a ../queue/ directory there, we are inside a partition.
295 * Check if that is the case and jump back. For loop/md/dm etc we
296 * are already in the right spot.
298 sprintf(tmp, "%s/../queue", foo);
299 if (!stat(tmp, &st)) {
301 sprintf(tmp, "%s/queue", p);
302 if (stat(tmp, &st)) {
303 log_err("unknown sysfs layout\n");
306 strncpy(tmp, p, PATH_MAX - 1);
307 sprintf(foo, "%s", tmp);
311 td->sysfs_root = strdup(foo);
313 disk_util_add(dev, foo);
316 void disk_util_timer_arm(void)
318 itimer.it_value.tv_sec = 0;
319 itimer.it_value.tv_usec = DISK_UTIL_MSEC * 1000;
320 setitimer(ITIMER_REAL, &itimer, NULL);
323 void update_rusage_stat(struct thread_data *td)
325 struct thread_stat *ts = &td->ts;
327 getrusage(RUSAGE_SELF, &ts->ru_end);
329 ts->usr_time += mtime_since(&ts->ru_start.ru_utime, &ts->ru_end.ru_utime);
330 ts->sys_time += mtime_since(&ts->ru_start.ru_stime, &ts->ru_end.ru_stime);
331 ts->ctx += ts->ru_end.ru_nvcsw + ts->ru_end.ru_nivcsw - (ts->ru_start.ru_nvcsw + ts->ru_start.ru_nivcsw);
333 memcpy(&ts->ru_start, &ts->ru_end, sizeof(ts->ru_end));
336 static int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max,
337 double *mean, double *dev)
339 double n = is->samples;
341 if (is->samples == 0)
347 n = (double) is->samples;
351 *dev = sqrt(is->S / (n - 1.0));
358 static void show_group_stats(struct group_run_stats *rs, int id)
360 char *p1, *p2, *p3, *p4;
361 const char *ddir_str[] = { " READ", " WRITE" };
364 fprintf(f_out, "\nRun status group %d (all jobs):\n", id);
366 for (i = 0; i <= DDIR_WRITE; i++) {
370 p1 = num2str(rs->io_kb[i], 6, 1);
371 p2 = num2str(rs->agg[i], 6, 1);
372 p3 = num2str(rs->min_bw[i], 6, 1);
373 p4 = num2str(rs->max_bw[i], 6, 1);
375 fprintf(f_out, "%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[0], rs->max_run[0]);
384 static void show_disk_util(void)
386 struct disk_util_stat *dus;
387 struct list_head *entry, *next;
388 struct disk_util *du;
391 fprintf(f_out, "\nDisk stats (read/write):\n");
393 list_for_each(entry, &disk_list) {
394 du = list_entry(entry, struct disk_util, list);
397 util = (double) 100 * du->dus.io_ticks / (double) du->msec;
401 fprintf(f_out, " %s: ios=%u/%u, merge=%u/%u, ticks=%u/%u, in_queue=%u, util=%3.2f%%\n", du->name, dus->ios[0], dus->ios[1], dus->merges[0], dus->merges[1], dus->ticks[0], dus->ticks[1], dus->time_in_queue, util);
407 list_for_each_safe(entry, next, &disk_list) {
409 du = list_entry(entry, struct disk_util, list);
415 static void show_ddir_status(struct thread_data *td, struct group_run_stats *rs,
418 const char *ddir_str[] = { "read ", "write" };
419 struct thread_stat *ts;
420 unsigned long min, max;
421 unsigned long long bw;
425 if (!td->runtime[ddir])
428 bw = td->io_bytes[ddir] / td->runtime[ddir];
429 io_p = num2str(td->io_bytes[ddir] >> 10, 6, 1);
430 bw_p = num2str(bw, 6, 1);
432 fprintf(f_out, " %s: io=%siB, bw=%siB/s, runt=%6lumsec\n", ddir_str[ddir], io_p, bw_p, td->runtime[ddir]);
438 if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
439 fprintf(f_out, " slat (msec): min=%5lu, max=%5lu, avg=%5.02f, stdev=%5.02f\n", min, max, mean, dev);
441 if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev))
442 fprintf(f_out, " clat (msec): min=%5lu, max=%5lu, avg=%5.02f, stdev=%5.02f\n", min, max, mean, dev);
444 if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
447 p_of_agg = mean * 100 / (double) rs->agg[ddir];
448 fprintf(f_out, " bw (KiB/s) : min=%5lu, max=%5lu, per=%3.2f%%, avg=%5.02f, stdev=%5.02f\n", min, max, p_of_agg, mean, dev);
452 static void show_thread_status(struct thread_data *td,
453 struct group_run_stats *rs)
455 double usr_cpu, sys_cpu;
456 unsigned long runtime;
457 double io_u_dist[FIO_IO_U_MAP_NR];
458 double io_u_lat[FIO_IO_U_LAT_NR];
461 if (!(td->io_bytes[0] + td->io_bytes[1]))
465 fprintf(f_out, "%s: (groupid=%d): err=%2d: pid=%d\n",td->name, td->groupid, td->error, td->pid);
467 fprintf(f_out, "%s: (groupid=%d): err=%2d (%s): pid=%d\n",td->name, td->groupid, td->error, td->verror, td->pid);
470 show_ddir_status(td, rs, DDIR_READ);
472 show_ddir_status(td, rs, DDIR_WRITE);
474 runtime = mtime_since(&td->epoch, &td->end_time);
476 double runt = (double) runtime;
478 usr_cpu = (double) td->ts.usr_time * 100 / runt;
479 sys_cpu = (double) td->ts.sys_time * 100 / runt;
485 fprintf(f_out, " cpu : usr=%3.2f%%, sys=%3.2f%%, ctx=%lu\n", usr_cpu, sys_cpu, td->ts.ctx);
488 * Do depth distribution calculations
490 for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
491 io_u_dist[i] = (double) td->io_u_map[i] / (double) td->total_io_u;
492 io_u_dist[i] *= 100.0;
495 fprintf(f_out, " 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]);
498 * Do latency distribution calculations
500 for (i = 0; i < FIO_IO_U_LAT_NR; i++) {
501 io_u_lat[i] = (double) td->io_u_lat[i] / (double) td->total_io_u;
502 io_u_lat[i] *= 100.0;
505 fprintf(f_out, " lat (msec): 2=%3.1f%%, 4=%3.1f%%, 10=%3.1f%%, 20=%3.1f%%, 50=%3.1f%%, 100=%3.1f%%\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]);
506 fprintf(f_out, " lat (msec): 250=%3.1f%%, 500=%3.1f%%, 750=%3.1f%%, 1000=%3.1f%%, >=2000=%3.1f%%\n", io_u_lat[6], io_u_lat[7], io_u_lat[8], io_u_lat[9], io_u_lat[10]);
509 fprintf(f_out, "%s\n", td->description);
512 static void show_ddir_status_terse(struct thread_data *td,
513 struct group_run_stats *rs, int ddir)
515 struct thread_stat *ts = &td->ts;
516 unsigned long min, max;
517 unsigned long long bw;
521 if (td->runtime[ddir])
522 bw = td->io_bytes[ddir] / td->runtime[ddir];
524 fprintf(f_out, ",%llu,%llu,%lu", td->io_bytes[ddir] >> 10, bw, td->runtime[ddir]);
526 if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
527 fprintf(f_out, ",%lu,%lu,%f,%f", min, max, mean, dev);
529 fprintf(f_out, ",%lu,%lu,%f,%f", 0UL, 0UL, 0.0, 0.0);
531 if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev))
532 fprintf(f_out, ",%lu,%lu,%f,%f", min, max, mean, dev);
534 fprintf(f_out, ",%lu,%lu,%f,%f", 0UL, 0UL, 0.0, 0.0);
536 if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
539 p_of_agg = mean * 100 / (double) rs->agg[ddir];
540 fprintf(f_out, ",%lu,%lu,%f%%,%f,%f", min, max, p_of_agg, mean, dev);
542 fprintf(f_out, ",%lu,%lu,%f%%,%f,%f", 0UL, 0UL, 0.0, 0.0, 0.0);
547 static void show_thread_status_terse(struct thread_data *td,
548 struct group_run_stats *rs)
550 double usr_cpu, sys_cpu;
552 fprintf(f_out, "%s,%d,%d",td->name, td->groupid, td->error);
554 show_ddir_status_terse(td, rs, 0);
555 show_ddir_status_terse(td, rs, 1);
557 if (td->runtime[0] + td->runtime[1]) {
558 double runt = (double) (td->runtime[0] + td->runtime[1]);
560 usr_cpu = (double) td->ts.usr_time * 100 / runt;
561 sys_cpu = (double) td->ts.sys_time * 100 / runt;
567 fprintf(f_out, ",%f%%,%f%%,%lu\n", usr_cpu, sys_cpu, td->ts.ctx);
570 void show_run_stats(void)
572 struct group_run_stats *runstats, *rs;
573 struct thread_data *td;
576 runstats = malloc(sizeof(struct group_run_stats) * (groupid + 1));
578 for (i = 0; i < groupid + 1; i++) {
581 memset(rs, 0, sizeof(*rs));
582 rs->min_bw[0] = rs->min_run[0] = ~0UL;
583 rs->min_bw[1] = rs->min_run[1] = ~0UL;
587 unsigned long long rbw, wbw;
589 rs = &runstats[td->groupid];
591 if (td->runtime[0] < rs->min_run[0] || !rs->min_run[0])
592 rs->min_run[0] = td->runtime[0];
593 if (td->runtime[0] > rs->max_run[0])
594 rs->max_run[0] = td->runtime[0];
595 if (td->runtime[1] < rs->min_run[1] || !rs->min_run[1])
596 rs->min_run[1] = td->runtime[1];
597 if (td->runtime[1] > rs->max_run[1])
598 rs->max_run[1] = td->runtime[1];
602 rbw = td->io_bytes[0] / (unsigned long long) td->runtime[0];
604 wbw = td->io_bytes[1] / (unsigned long long) td->runtime[1];
606 if (rbw < rs->min_bw[0])
608 if (wbw < rs->min_bw[1])
610 if (rbw > rs->max_bw[0])
612 if (wbw > rs->max_bw[1])
615 rs->io_kb[0] += td->io_bytes[0] >> 10;
616 rs->io_kb[1] += td->io_bytes[1] >> 10;
619 for (i = 0; i < groupid + 1; i++) {
623 rs->agg[0] = (rs->io_kb[0]*1024) / rs->max_run[0];
625 rs->agg[1] = (rs->io_kb[1]*1024) / rs->max_run[1];
629 * don't overwrite last signal output
635 rs = &runstats[td->groupid];
638 show_thread_status_terse(td, rs);
640 show_thread_status(td, rs);
644 for (i = 0; i < groupid + 1; i++)
645 show_group_stats(&runstats[i], i);
653 static inline void add_stat_sample(struct io_stat *is, unsigned long data)
658 if (data > is->max_val)
660 if (data < is->min_val)
663 delta = val - is->mean;
664 n = is->samples + 1.0;
665 is->mean += delta / n;
666 is->S += delta * (val - is->mean);
671 static void __add_log_sample(struct io_log *iolog, unsigned long val,
672 enum fio_ddir ddir, unsigned long time)
674 if (iolog->nr_samples == iolog->max_samples) {
675 int new_size = sizeof(struct io_sample) * iolog->max_samples*2;
677 iolog->log = realloc(iolog->log, new_size);
678 iolog->max_samples <<= 1;
681 iolog->log[iolog->nr_samples].val = val;
682 iolog->log[iolog->nr_samples].time = time;
683 iolog->log[iolog->nr_samples].ddir = ddir;
687 static void add_log_sample(struct thread_data *td, struct io_log *iolog,
688 unsigned long val, enum fio_ddir ddir)
690 __add_log_sample(iolog, val, ddir, mtime_since_now(&td->epoch));
693 void add_agg_sample(unsigned long val, enum fio_ddir ddir)
695 struct io_log *iolog = agg_io_log[ddir];
697 __add_log_sample(iolog, val, ddir, mtime_since_genesis());
700 void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
703 struct thread_stat *ts = &td->ts;
705 add_stat_sample(&ts->clat_stat[ddir], msec);
708 add_log_sample(td, ts->clat_log, msec, ddir);
711 void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
714 struct thread_stat *ts = &td->ts;
716 add_stat_sample(&ts->slat_stat[ddir], msec);
719 add_log_sample(td, ts->slat_log, msec, ddir);
722 void add_bw_sample(struct thread_data *td, enum fio_ddir ddir,
725 struct thread_stat *ts = &td->ts;
726 unsigned long spent = mtime_since(&ts->stat_sample_time[ddir], t);
729 if (spent < td->bw_avg_time)
732 rate = (td->this_io_bytes[ddir] - ts->stat_io_bytes[ddir]) / spent;
733 add_stat_sample(&ts->bw_stat[ddir], rate);
736 add_log_sample(td, ts->bw_log, rate, ddir);
738 fio_gettime(&ts->stat_sample_time[ddir], NULL);
739 ts->stat_io_bytes[ddir] = td->this_io_bytes[ddir];