blob: a540304c6b1d928fc05deea96096c0ace01b91b3 [file] [log] [blame]
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <libgen.h>
#include <math.h>
#include "fio.h"
static struct itimerval itimer;
static struct list_head disk_list = LIST_HEAD_INIT(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("%s: (groupid=%d): err=%2d:\n",td->name, 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("%s: %s\n", td->name, 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];
}