--- /dev/null
+#include <stdio.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <libgen.h>
+#include <math.h>
+
+#include "fio.h"
+#include "fio-time.h"
+
+static struct itimerval itimer;
+static LIST_HEAD(disk_list);
+
+static int get_io_ticks(struct disk_util *du, struct disk_util_stat *dus)
+{
+ unsigned in_flight;
+ char line[256];
+ FILE *f;
+ char *p;
+
+ f = fopen(du->path, "r");
+ if (!f)
+ return 1;
+
+ p = fgets(line, sizeof(line), f);
+ if (!p) {
+ fclose(f);
+ return 1;
+ }
+
+ 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) {
+ fclose(f);
+ return 1;
+ }
+
+ fclose(f);
+ return 0;
+}
+
+static void update_io_tick_disk(struct disk_util *du)
+{
+ struct disk_util_stat __dus, *dus, *ldus;
+ struct timeval t;
+
+ if (get_io_ticks(du, &__dus))
+ return;
+
+ dus = &du->dus;
+ ldus = &du->last_dus;
+
+ dus->sectors[0] += (__dus.sectors[0] - ldus->sectors[0]);
+ dus->sectors[1] += (__dus.sectors[1] - ldus->sectors[1]);
+ dus->ios[0] += (__dus.ios[0] - ldus->ios[0]);
+ dus->ios[1] += (__dus.ios[1] - ldus->ios[1]);
+ dus->merges[0] += (__dus.merges[0] - ldus->merges[0]);
+ dus->merges[1] += (__dus.merges[1] - ldus->merges[1]);
+ dus->ticks[0] += (__dus.ticks[0] - ldus->ticks[0]);
+ dus->ticks[1] += (__dus.ticks[1] - ldus->ticks[1]);
+ dus->io_ticks += (__dus.io_ticks - ldus->io_ticks);
+ dus->time_in_queue += (__dus.time_in_queue - ldus->time_in_queue);
+
+ gettimeofday(&t, NULL);
+ du->msec += mtime_since(&du->time, &t);
+ memcpy(&du->time, &t, sizeof(t));
+ memcpy(ldus, &__dus, sizeof(__dus));
+}
+
+void update_io_ticks(void)
+{
+ struct list_head *entry;
+ struct disk_util *du;
+
+ list_for_each(entry, &disk_list) {
+ du = list_entry(entry, struct disk_util, list);
+ update_io_tick_disk(du);
+ }
+}
+
+static int disk_util_exists(dev_t dev)
+{
+ struct list_head *entry;
+ struct disk_util *du;
+
+ list_for_each(entry, &disk_list) {
+ du = list_entry(entry, struct disk_util, list);
+
+ if (du->dev == dev)
+ return 1;
+ }
+
+ return 0;
+}
+
+static void disk_util_add(dev_t dev, char *path)
+{
+ struct disk_util *du = malloc(sizeof(*du));
+
+ memset(du, 0, sizeof(*du));
+ INIT_LIST_HEAD(&du->list);
+ sprintf(du->path, "%s/stat", path);
+ du->name = strdup(basename(path));
+ du->dev = dev;
+
+ gettimeofday(&du->time, NULL);
+ get_io_ticks(du, &du->last_dus);
+
+ list_add_tail(&du->list, &disk_list);
+}
+
+static int check_dev_match(dev_t dev, char *path)
+{
+ unsigned int major, minor;
+ char line[256], *p;
+ FILE *f;
+
+ f = fopen(path, "r");
+ if (!f) {
+ perror("open path");
+ return 1;
+ }
+
+ p = fgets(line, sizeof(line), f);
+ if (!p) {
+ fclose(f);
+ return 1;
+ }
+
+ if (sscanf(p, "%u:%u", &major, &minor) != 2) {
+ fclose(f);
+ return 1;
+ }
+
+ if (((major << 8) | minor) == dev) {
+ fclose(f);
+ return 0;
+ }
+
+ fclose(f);
+ return 1;
+}
+
+static int find_block_dir(dev_t dev, char *path)
+{
+ struct dirent *dir;
+ struct stat st;
+ int found = 0;
+ DIR *D;
+
+ D = opendir(path);
+ if (!D)
+ return 0;
+
+ while ((dir = readdir(D)) != NULL) {
+ char full_path[256];
+
+ if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
+ continue;
+ if (!strcmp(dir->d_name, "device"))
+ continue;
+
+ sprintf(full_path, "%s/%s", path, dir->d_name);
+
+ if (!strcmp(dir->d_name, "dev")) {
+ if (!check_dev_match(dev, full_path)) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (stat(full_path, &st) == -1) {
+ perror("stat");
+ break;
+ }
+
+ if (!S_ISDIR(st.st_mode) || S_ISLNK(st.st_mode))
+ continue;
+
+ found = find_block_dir(dev, full_path);
+ if (found) {
+ strcpy(path, full_path);
+ break;
+ }
+ }
+
+ closedir(D);
+ return found;
+}
+
+void init_disk_util(struct thread_data *td)
+{
+ struct stat st;
+ char foo[256], tmp[256];
+ dev_t dev;
+ char *p;
+
+ if (!td->do_disk_util)
+ return;
+
+ if (!stat(td->file_name, &st)) {
+ if (S_ISBLK(st.st_mode))
+ dev = st.st_rdev;
+ else
+ dev = st.st_dev;
+ } else {
+ /*
+ * must be a file, open "." in that path
+ */
+ strcpy(foo, td->file_name);
+ p = dirname(foo);
+ if (stat(p, &st)) {
+ perror("disk util stat");
+ return;
+ }
+
+ dev = st.st_dev;
+ }
+
+ if (disk_util_exists(dev))
+ return;
+
+ sprintf(foo, "/sys/block");
+ if (!find_block_dir(dev, foo))
+ return;
+
+ /*
+ * If there's a ../queue/ directory there, we are inside a partition.
+ * Check if that is the case and jump back. For loop/md/dm etc we
+ * are already in the right spot.
+ */
+ sprintf(tmp, "%s/../queue", foo);
+ if (!stat(tmp, &st)) {
+ p = dirname(foo);
+ sprintf(tmp, "%s/queue", p);
+ if (stat(tmp, &st)) {
+ fprintf(stderr, "unknown sysfs layout\n");
+ return;
+ }
+ sprintf(foo, "%s", p);
+ }
+
+ td->sysfs_root = strdup(foo);
+ disk_util_add(dev, foo);
+}
+
+void disk_util_timer_arm(void)
+{
+ itimer.it_value.tv_sec = 0;
+ itimer.it_value.tv_usec = DISK_UTIL_MSEC * 1000;
+ setitimer(ITIMER_REAL, &itimer, NULL);
+}
+
+void update_rusage_stat(struct thread_data *td)
+{
+ if (!(td->runtime[0] + td->runtime[1]))
+ return;
+
+ getrusage(RUSAGE_SELF, &td->ru_end);
+
+ td->usr_time += mtime_since(&td->ru_start.ru_utime, &td->ru_end.ru_utime);
+ td->sys_time += mtime_since(&td->ru_start.ru_stime, &td->ru_end.ru_stime);
+ td->ctx += td->ru_end.ru_nvcsw + td->ru_end.ru_nivcsw - (td->ru_start.ru_nvcsw + td->ru_start.ru_nivcsw);
+
+
+ memcpy(&td->ru_start, &td->ru_end, sizeof(td->ru_end));
+}
+
+static int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max,
+ double *mean, double *dev)
+{
+ double n;
+
+ if (is->samples == 0)
+ return 0;
+
+ *min = is->min_val;
+ *max = is->max_val;
+
+ n = (double) is->samples;
+ *mean = (double) is->val / n;
+ *dev = sqrt(((double) is->val_sq - (*mean * *mean) / n) / (n - 1));
+ if (!(*min + *max) && !(*mean + *dev))
+ return 0;
+
+ return 1;
+}
+
+static void show_group_stats(struct group_run_stats *rs, int id)
+{
+ printf("\nRun status group %d (all jobs):\n", id);
+
+ if (rs->max_run[DDIR_READ])
+ printf(" READ: io=%lluMiB, aggrb=%llu, minb=%llu, maxb=%llu, mint=%llumsec, maxt=%llumsec\n", rs->io_kb[0] >> 10, rs->agg[0], rs->min_bw[0], rs->max_bw[0], rs->min_run[0], rs->max_run[0]);
+ if (rs->max_run[DDIR_WRITE])
+ printf(" WRITE: io=%lluMiB, aggrb=%llu, minb=%llu, maxb=%llu, mint=%llumsec, maxt=%llumsec\n", rs->io_kb[1] >> 10, rs->agg[1], rs->min_bw[1], rs->max_bw[1], rs->min_run[1], rs->max_run[1]);
+}
+
+static void show_disk_util(void)
+{
+ struct disk_util_stat *dus;
+ struct list_head *entry;
+ struct disk_util *du;
+ double util;
+
+ printf("\nDisk stats (read/write):\n");
+
+ list_for_each(entry, &disk_list) {
+ du = list_entry(entry, struct disk_util, list);
+ dus = &du->dus;
+
+ util = (double) 100 * du->dus.io_ticks / (double) du->msec;
+ if (util > 100.0)
+ util = 100.0;
+
+ printf(" %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);
+ }
+}
+
+static void show_ddir_status(struct thread_data *td, struct group_run_stats *rs,
+ int ddir)
+{
+ char *ddir_str[] = { "read ", "write" };
+ unsigned long min, max;
+ unsigned long long bw;
+ double mean, dev;
+
+ if (!td->runtime[ddir])
+ return;
+
+ bw = td->io_bytes[ddir] / td->runtime[ddir];
+ printf(" %s: io=%6lluMiB, bw=%6lluKiB/s, runt=%6lumsec\n", ddir_str[ddir], td->io_bytes[ddir] >> 20, bw, td->runtime[ddir]);
+
+ if (calc_lat(&td->slat_stat[ddir], &min, &max, &mean, &dev))
+ printf(" slat (msec): min=%5lu, max=%5lu, avg=%5.02f, dev=%5.02f\n", min, max, mean, dev);
+
+ if (calc_lat(&td->clat_stat[ddir], &min, &max, &mean, &dev))
+ printf(" clat (msec): min=%5lu, max=%5lu, avg=%5.02f, dev=%5.02f\n", min, max, mean, dev);
+
+ if (calc_lat(&td->bw_stat[ddir], &min, &max, &mean, &dev)) {
+ double p_of_agg;
+
+ p_of_agg = mean * 100 / (double) rs->agg[ddir];
+ printf(" bw (KiB/s) : min=%5lu, max=%5lu, per=%3.2f%%, avg=%5.02f, dev=%5.02f\n", min, max, p_of_agg, mean, dev);
+ }
+}
+
+static void show_thread_status(struct thread_data *td,
+ struct group_run_stats *rs)
+{
+ double usr_cpu, sys_cpu;
+
+ if (!(td->io_bytes[0] + td->io_bytes[1]) && !td->error)
+ return;
+
+ printf("Client%d (groupid=%d): err=%2d:\n", td->thread_number, td->groupid, td->error);
+
+ show_ddir_status(td, rs, td->ddir);
+ if (td->io_bytes[td->ddir ^ 1])
+ show_ddir_status(td, rs, td->ddir ^ 1);
+
+ if (td->runtime[0] + td->runtime[1]) {
+ double runt = td->runtime[0] + td->runtime[1];
+
+ usr_cpu = (double) td->usr_time * 100 / runt;
+ sys_cpu = (double) td->sys_time * 100 / runt;
+ } else {
+ usr_cpu = 0;
+ sys_cpu = 0;
+ }
+
+ printf(" cpu : usr=%3.2f%%, sys=%3.2f%%, ctx=%lu\n", usr_cpu, sys_cpu, td->ctx);
+}
+
+void show_run_stats(void)
+{
+ struct group_run_stats *runstats, *rs;
+ struct thread_data *td;
+ int i;
+
+ runstats = malloc(sizeof(struct group_run_stats) * (groupid + 1));
+
+ for (i = 0; i < groupid + 1; i++) {
+ rs = &runstats[i];
+
+ memset(rs, 0, sizeof(*rs));
+ rs->min_bw[0] = rs->min_run[0] = ~0UL;
+ rs->min_bw[1] = rs->min_run[1] = ~0UL;
+ }
+
+ for (i = 0; i < thread_number; i++) {
+ unsigned long long rbw, wbw;
+
+ td = &threads[i];
+
+ if (td->error) {
+ printf("Client%d: %s\n", td->thread_number, td->verror);
+ continue;
+ }
+
+ rs = &runstats[td->groupid];
+
+ if (td->runtime[0] < rs->min_run[0] || !rs->min_run[0])
+ rs->min_run[0] = td->runtime[0];
+ if (td->runtime[0] > rs->max_run[0])
+ rs->max_run[0] = td->runtime[0];
+ if (td->runtime[1] < rs->min_run[1] || !rs->min_run[1])
+ rs->min_run[1] = td->runtime[1];
+ if (td->runtime[1] > rs->max_run[1])
+ rs->max_run[1] = td->runtime[1];
+
+ rbw = wbw = 0;
+ if (td->runtime[0])
+ rbw = td->io_bytes[0] / (unsigned long long) td->runtime[0];
+ if (td->runtime[1])
+ wbw = td->io_bytes[1] / (unsigned long long) td->runtime[1];
+
+ if (rbw < rs->min_bw[0])
+ rs->min_bw[0] = rbw;
+ if (wbw < rs->min_bw[1])
+ rs->min_bw[1] = wbw;
+ if (rbw > rs->max_bw[0])
+ rs->max_bw[0] = rbw;
+ if (wbw > rs->max_bw[1])
+ rs->max_bw[1] = wbw;
+
+ rs->io_kb[0] += td->io_bytes[0] >> 10;
+ rs->io_kb[1] += td->io_bytes[1] >> 10;
+ }
+
+ for (i = 0; i < groupid + 1; i++) {
+ rs = &runstats[i];
+
+ if (rs->max_run[0])
+ rs->agg[0] = (rs->io_kb[0]*1024) / rs->max_run[0];
+ if (rs->max_run[1])
+ rs->agg[1] = (rs->io_kb[1]*1024) / rs->max_run[1];
+ }
+
+ /*
+ * don't overwrite last signal output
+ */
+ printf("\n");
+
+ for (i = 0; i < thread_number; i++) {
+ td = &threads[i];
+ rs = &runstats[td->groupid];
+
+ show_thread_status(td, rs);
+ }
+
+ for (i = 0; i < groupid + 1; i++)
+ show_group_stats(&runstats[i], i);
+
+ show_disk_util();
+}
+
+static inline void add_stat_sample(struct io_stat *is, unsigned long val)
+{
+ if (val > is->max_val)
+ is->max_val = val;
+ if (val < is->min_val)
+ is->min_val = val;
+
+ is->val += val;
+ is->val_sq += val * val;
+ is->samples++;
+}
+
+static void add_log_sample(struct thread_data *td, struct io_log *iolog,
+ unsigned long val, int ddir)
+{
+ if (iolog->nr_samples == iolog->max_samples) {
+ int new_size = sizeof(struct io_sample) * iolog->max_samples*2;
+
+ iolog->log = realloc(iolog->log, new_size);
+ iolog->max_samples <<= 1;
+ }
+
+ iolog->log[iolog->nr_samples].val = val;
+ iolog->log[iolog->nr_samples].time = mtime_since_now(&td->epoch);
+ iolog->log[iolog->nr_samples].ddir = ddir;
+ iolog->nr_samples++;
+}
+
+void add_clat_sample(struct thread_data *td, int ddir, unsigned long msec)
+{
+ add_stat_sample(&td->clat_stat[ddir], msec);
+
+ if (td->clat_log)
+ add_log_sample(td, td->clat_log, msec, ddir);
+}
+
+void add_slat_sample(struct thread_data *td, int ddir, unsigned long msec)
+{
+ add_stat_sample(&td->slat_stat[ddir], msec);
+
+ if (td->slat_log)
+ add_log_sample(td, td->slat_log, msec, ddir);
+}
+
+void add_bw_sample(struct thread_data *td, int ddir)
+{
+ unsigned long spent = mtime_since_now(&td->stat_sample_time[ddir]);
+ unsigned long rate;
+
+ if (spent < td->bw_avg_time)
+ return;
+
+ rate = (td->this_io_bytes[ddir] - td->stat_io_bytes[ddir]) / spent;
+ add_stat_sample(&td->bw_stat[ddir], rate);
+
+ if (td->bw_log)
+ add_log_sample(td, td->bw_log, rate, ddir);
+
+ gettimeofday(&td->stat_sample_time[ddir], NULL);
+ td->stat_io_bytes[ddir] = td->this_io_bytes[ddir];
+}
+
+
projects / fio.git / blobdiff