blob: 4fe0dbd3dd65a9a129c9a6951bfe9e9bdae3754a [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 dev_t last_dev;
/*
* Cheesy number->string conversion, complete with carry rounding error.
*/
static char *num2str(unsigned long num, int maxlen, int base, int pow2)
{
char postfix[] = { ' ', 'K', 'M', 'G', 'P', 'E' };
unsigned int thousand;
char *buf;
int i;
if (pow2)
thousand = 1024;
else
thousand = 1000;
buf = malloc(128);
for (i = 0; base > 1; i++)
base /= thousand;
do {
int len, carry = 0;
len = sprintf(buf, "%'lu", num);
if (len <= maxlen) {
if (i >= 1) {
buf[len] = postfix[i];
buf[len + 1] = '\0';
}
return buf;
}
if ((num % thousand) >= (thousand / 2))
carry = 1;
num /= thousand;
num += carry;
i++;
} while (i <= 5);
return buf;
}
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);
fio_gettime(&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, *__du;
struct list_head *entry;
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;
list_for_each(entry, &disk_list) {
__du = list_entry(entry, struct disk_util, list);
if (!strcmp(du->name, __du->name)) {
free(du->name);
free(du);
return;
}
}
fio_gettime(&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;
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 (lstat(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;
}
static void __init_disk_util(struct thread_data *td, struct fio_file *f)
{
struct stat st;
char foo[PATH_MAX], tmp[PATH_MAX];
dev_t dev;
char *p;
if (!stat(f->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
*/
strncpy(foo, f->file_name, PATH_MAX - 1);
p = dirname(foo);
if (stat(p, &st)) {
perror("disk util stat");
return;
}
dev = st.st_dev;
}
if (disk_util_exists(dev))
return;
/*
* for an fs without a device, we will repeatedly stat through
* sysfs which can take oodles of time for thousands of files. so
* cache the last lookup and compare with that before going through
* everything again.
*/
if (dev == last_dev)
return;
last_dev = dev;
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)) {
log_err("unknown sysfs layout\n");
return;
}
strncpy(tmp, p, PATH_MAX - 1);
sprintf(foo, "%s", tmp);
}
if (td->o.ioscheduler && !td->sysfs_root)
td->sysfs_root = strdup(foo);
disk_util_add(dev, foo);
}
void init_disk_util(struct thread_data *td)
{
struct fio_file *f;
unsigned int i;
if (!td->o.do_disk_util ||
(td->io_ops->flags & (FIO_DISKLESSIO | FIO_NODISKUTIL)))
return;
for_each_file(td, f, i)
__init_disk_util(td, f);
}
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)
{
struct thread_stat *ts = &td->ts;
getrusage(RUSAGE_SELF, &ts->ru_end);
ts->usr_time += mtime_since(&ts->ru_start.ru_utime, &ts->ru_end.ru_utime);
ts->sys_time += mtime_since(&ts->ru_start.ru_stime, &ts->ru_end.ru_stime);
ts->ctx += ts->ru_end.ru_nvcsw + ts->ru_end.ru_nivcsw - (ts->ru_start.ru_nvcsw + ts->ru_start.ru_nivcsw);
memcpy(&ts->ru_start, &ts->ru_end, sizeof(ts->ru_end));
}
static int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max,
double *mean, double *dev)
{
double n = is->samples;
if (is->samples == 0)
return 0;
*min = is->min_val;
*max = is->max_val;
n = (double) is->samples;
*mean = is->mean;
if (n > 1.0)
*dev = sqrt(is->S / (n - 1.0));
else
*dev = -1.0;
return 1;
}
static void show_group_stats(struct group_run_stats *rs, int id)
{
char *p1, *p2, *p3, *p4;
const char *ddir_str[] = { " READ", " WRITE" };
int i;
log_info("\nRun status group %d (all jobs):\n", id);
for (i = 0; i <= DDIR_WRITE; i++) {
if (!rs->max_run[i])
continue;
p1 = num2str(rs->io_kb[i], 6, 1000, 1);
p2 = num2str(rs->agg[i], 6, 1000, 1);
p3 = num2str(rs->min_bw[i], 6, 1000, 1);
p4 = num2str(rs->max_bw[i], 6, 1000, 1);
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]);
free(p1);
free(p2);
free(p3);
free(p4);
}
}
static void show_disk_util(void)
{
struct disk_util_stat *dus;
struct list_head *entry, *next;
struct disk_util *du;
double util;
log_info("\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;
log_info(" %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);
}
/*
* now free the list
*/
list_for_each_safe(entry, next, &disk_list) {
list_del(entry);
du = list_entry(entry, struct disk_util, list);
free(du->name);
free(du);
}
}
#define ts_total_io_u(ts) \
((ts)->total_io_u[0] + (ts)->total_io_u[1])
static void stat_calc_dist(struct thread_stat *ts, double *io_u_dist)
{
int i;
/*
* Do depth distribution calculations
*/
for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
io_u_dist[i] = (double) ts->io_u_map[i] / (double) ts_total_io_u(ts);
io_u_dist[i] *= 100.0;
}
}
static void stat_calc_lat(struct thread_stat *ts, double *io_u_lat)
{
int i;
/*
* Do latency distribution calculations
*/
for (i = 0; i < FIO_IO_U_LAT_NR; i++) {
io_u_lat[i] = (double) ts->io_u_lat[i] / (double) ts_total_io_u(ts);
io_u_lat[i] *= 100.0;
}
}
static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
int ddir)
{
const char *ddir_str[] = { "read ", "write" };
unsigned long min, max;
unsigned long long bw, iops;
double mean, dev;
char *io_p, *bw_p, *iops_p;
if (!ts->runtime[ddir])
return;
bw = ts->io_bytes[ddir] / ts->runtime[ddir];
iops = (1000 * ts->total_io_u[ddir]) / ts->runtime[ddir];
io_p = num2str(ts->io_bytes[ddir] >> 10, 6, 1000, 1);
bw_p = num2str(bw, 6, 1000, 1);
iops_p = num2str(iops, 6, 1, 0);
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]);
free(io_p);
free(bw_p);
free(iops_p);
if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
log_info(" slat (msec): min=%5lu, max=%5lu, avg=%5.02f, stdev=%5.02f\n", min, max, mean, dev);
if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev))
log_info(" clat (msec): min=%5lu, max=%5lu, avg=%5.02f, stdev=%5.02f\n", min, max, mean, dev);
if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
double p_of_agg;
p_of_agg = mean * 100 / (double) rs->agg[ddir];
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);
}
}
static void show_thread_status(struct thread_stat *ts,
struct group_run_stats *rs)
{
double usr_cpu, sys_cpu;
unsigned long runtime;
double io_u_dist[FIO_IO_U_MAP_NR];
double io_u_lat[FIO_IO_U_LAT_NR];
if (!(ts->io_bytes[0] + ts->io_bytes[1]))
return;
if (!ts->error)
log_info("%s: (groupid=%d, jobs=%d): err=%2d: pid=%d\n", ts->name, ts->groupid, ts->members, ts->error, ts->pid);
else
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);
if (ts->description)
log_info(" Description : [%s]\n", ts->description);
if (ts->io_bytes[DDIR_READ])
show_ddir_status(rs, ts, DDIR_READ);
if (ts->io_bytes[DDIR_WRITE])
show_ddir_status(rs, ts, DDIR_WRITE);
runtime = ts->total_run_time;
if (runtime) {
double runt = (double) runtime;
usr_cpu = (double) ts->usr_time * 100 / runt;
sys_cpu = (double) ts->sys_time * 100 / runt;
} else {
usr_cpu = 0;
sys_cpu = 0;
}
log_info(" cpu : usr=%3.2f%%, sys=%3.2f%%, ctx=%lu\n", usr_cpu, sys_cpu, ts->ctx);
stat_calc_dist(ts, io_u_dist);
stat_calc_lat(ts, io_u_lat);
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]);
log_info(" 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]);
log_info(" 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]);
}
static void show_ddir_status_terse(struct thread_stat *ts,
struct group_run_stats *rs, int ddir)
{
unsigned long min, max;
unsigned long long bw;
double mean, dev;
bw = 0;
if (ts->runtime[ddir])
bw = ts->io_bytes[ddir] / ts->runtime[ddir];
log_info(";%llu;%llu;%lu", ts->io_bytes[ddir] >> 10, bw, ts->runtime[ddir]);
if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
else
log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev))
log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
else
log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
double p_of_agg;
p_of_agg = mean * 100 / (double) rs->agg[ddir];
log_info(";%lu;%lu;%f%%;%f;%f", min, max, p_of_agg, mean, dev);
} else
log_info(";%lu;%lu;%f%%;%f;%f", 0UL, 0UL, 0.0, 0.0, 0.0);
}
static void show_thread_status_terse(struct thread_stat *ts,
struct group_run_stats *rs)
{
double io_u_dist[FIO_IO_U_MAP_NR];
double io_u_lat[FIO_IO_U_LAT_NR];
double usr_cpu, sys_cpu;
log_info("%s;%d;%d", ts->name, ts->groupid, ts->error);
show_ddir_status_terse(ts, rs, 0);
show_ddir_status_terse(ts, rs, 1);
if (ts->total_run_time) {
double runt = (double) ts->total_run_time;
usr_cpu = (double) ts->usr_time * 100 / runt;
sys_cpu = (double) ts->sys_time * 100 / runt;
} else {
usr_cpu = 0;
sys_cpu = 0;
}
log_info(";%f%%;%f%%;%lu", usr_cpu, sys_cpu, ts->ctx);
stat_calc_dist(ts, io_u_dist);
stat_calc_lat(ts, io_u_lat);
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]);
log_info(";%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%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]);
log_info(";%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%;%3.1f%%", io_u_lat[6], io_u_lat[7], io_u_lat[8], io_u_lat[9], io_u_lat[10]);
if (ts->description)
log_info(";%s", ts->description);
log_info("\n");
}
static void sum_stat(struct io_stat *dst, struct io_stat *src, int nr)
{
double mean, S;
dst->min_val = min(dst->min_val, src->min_val);
dst->max_val = max(dst->max_val, src->max_val);
dst->samples += src->samples;
/*
* Needs a new method for calculating stddev, we cannot just
* average them we do below for nr > 1
*/
if (nr == 1) {
mean = src->mean;
S = src->S;
} else {
mean = ((src->mean * (double) (nr - 1)) + dst->mean) / ((double) nr);
S = ((src->S * (double) (nr - 1)) + dst->S) / ((double) nr);
}
dst->mean = mean;
dst->S = S;
}
void show_run_stats(void)
{
struct group_run_stats *runstats, *rs;
struct thread_data *td;
struct thread_stat *threadstats, *ts;
int i, j, k, l, nr_ts, last_ts, idx;
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;
}
/*
* find out how many threads stats we need. if group reporting isn't
* enabled, it's one-per-td.
*/
nr_ts = 0;
last_ts = -1;
for_each_td(td, i) {
if (!td->o.group_reporting) {
nr_ts++;
continue;
}
if (last_ts == td->groupid)
continue;
last_ts = td->groupid;
nr_ts++;
}
threadstats = malloc(nr_ts * sizeof(struct thread_stat));
for (i = 0; i < nr_ts; i++) {
ts = &threadstats[i];
memset(ts, 0, sizeof(*ts));
for (j = 0; j <= DDIR_WRITE; j++) {
ts->clat_stat[j].min_val = -1UL;
ts->slat_stat[j].min_val = -1UL;
ts->bw_stat[j].min_val = -1UL;
}
ts->groupid = -1;
}
j = 0;
last_ts = -1;
idx = 0;
for_each_td(td, i) {
if (idx && (!td->o.group_reporting ||
(td->o.group_reporting && last_ts != td->groupid))) {
idx = 0;
j++;
}
last_ts = td->groupid;
ts = &threadstats[j];
idx++;
ts->members++;
if (ts->groupid == -1) {
/*
* These are per-group shared already
*/
ts->name = td->o.name;
ts->description = td->o.description;
ts->groupid = td->groupid;
/*
* first pid in group, not very useful...
*/
ts->pid = td->pid;
}
if (td->error && !ts->error) {
ts->error = td->error;
ts->verror = td->verror;
}
for (l = 0; l <= DDIR_WRITE; l++) {
sum_stat(&ts->clat_stat[l], &td->ts.clat_stat[l], idx);
sum_stat(&ts->slat_stat[l], &td->ts.slat_stat[l], idx);
sum_stat(&ts->bw_stat[l], &td->ts.bw_stat[l], idx);
ts->stat_io_bytes[l] += td->ts.stat_io_bytes[l];
ts->io_bytes[l] += td->ts.io_bytes[l];
if (ts->runtime[l] < td->ts.runtime[l])
ts->runtime[l] = td->ts.runtime[l];
}
ts->usr_time += td->ts.usr_time;
ts->sys_time += td->ts.sys_time;
ts->ctx += td->ts.ctx;
for (k = 0; k < FIO_IO_U_MAP_NR; k++)
ts->io_u_map[k] += td->ts.io_u_map[k];
for (k = 0; k < FIO_IO_U_LAT_NR; k++)
ts->io_u_lat[k] += td->ts.io_u_lat[k];
for (k = 0; k <= DDIR_WRITE; k++)
ts->total_io_u[k] += td->ts.total_io_u[k];
ts->total_run_time += td->ts.total_run_time;
}
for (i = 0; i < nr_ts; i++) {
unsigned long long bw;
ts = &threadstats[i];
rs = &runstats[ts->groupid];
for (j = 0; j <= DDIR_WRITE; j++) {
if (!ts->runtime[j])
continue;
if (ts->runtime[j] < rs->min_run[j] || !rs->min_run[j])
rs->min_run[j] = ts->runtime[j];
if (ts->runtime[j] > rs->max_run[j])
rs->max_run[j] = ts->runtime[j];
bw = 0;
if (ts->runtime[j])
bw = ts->io_bytes[j] / (unsigned long long) ts->runtime[j];
if (bw < rs->min_bw[j])
rs->min_bw[j] = bw;
if (bw > rs->max_bw[j])
rs->max_bw[j] = bw;
rs->io_kb[j] += ts->io_bytes[j] >> 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
*/
if (!terse_output)
printf("\n");
for (i = 0; i < nr_ts; i++) {
ts = &threadstats[i];
rs = &runstats[ts->groupid];
if (terse_output)
show_thread_status_terse(ts, rs);
else
show_thread_status(ts, rs);
}
if (!terse_output) {
for (i = 0; i < groupid + 1; i++)
show_group_stats(&runstats[i], i);
show_disk_util();
}
free(runstats);
free(threadstats);
}
static inline void add_stat_sample(struct io_stat *is, unsigned long data)
{
double val = data;
double delta;
if (data > is->max_val)
is->max_val = data;
if (data < is->min_val)
is->min_val = data;
delta = val - is->mean;
is->mean += delta / (is->samples + 1.0);
is->S += delta * (val - is->mean);
is->samples++;
}
static void __add_log_sample(struct io_log *iolog, unsigned long val,
enum fio_ddir ddir, unsigned long time)
{
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 = time;
iolog->log[iolog->nr_samples].ddir = ddir;
iolog->nr_samples++;
}
static void add_log_sample(struct thread_data *td, struct io_log *iolog,
unsigned long val, enum fio_ddir ddir)
{
__add_log_sample(iolog, val, ddir, mtime_since_now(&td->epoch));
}
void add_agg_sample(unsigned long val, enum fio_ddir ddir)
{
struct io_log *iolog = agg_io_log[ddir];
__add_log_sample(iolog, val, ddir, mtime_since_genesis());
}
void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
unsigned long msec)
{
struct thread_stat *ts = &td->ts;
add_stat_sample(&ts->clat_stat[ddir], msec);
if (ts->clat_log)
add_log_sample(td, ts->clat_log, msec, ddir);
}
void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
unsigned long msec)
{
struct thread_stat *ts = &td->ts;
add_stat_sample(&ts->slat_stat[ddir], msec);
if (ts->slat_log)
add_log_sample(td, ts->slat_log, msec, ddir);
}
void add_bw_sample(struct thread_data *td, enum fio_ddir ddir,
struct timeval *t)
{
struct thread_stat *ts = &td->ts;
unsigned long spent = mtime_since(&ts->stat_sample_time[ddir], t);
unsigned long rate;
if (spent < td->o.bw_avg_time)
return;
rate = (td->this_io_bytes[ddir] - ts->stat_io_bytes[ddir]) / spent;
add_stat_sample(&ts->bw_stat[ddir], rate);
if (ts->bw_log)
add_log_sample(td, ts->bw_log, rate, ddir);
fio_gettime(&ts->stat_sample_time[ddir], NULL);
ts->stat_io_bytes[ddir] = td->this_io_bytes[ddir];
}