[fio.git] / stat.c

#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"

/*
 * 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;
}

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);
	ts->minf += ts->ru_end.ru_minflt - ts->ru_start.ru_minflt;
	ts->majf += ts->ru_end.ru_majflt - ts->ru_start.ru_majflt;
	
	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 = 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);
	}
}

#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;
		if (io_u_dist[i] < 0.1 && ts->io_u_map[i])
			io_u_dist[i] = 0.1;
	}
}

static void stat_calc_lat(struct thread_stat *ts, double *dst,
			  unsigned int *src, int nr)
{
	int i;

	/*
	 * Do latency distribution calculations
	 */
	for (i = 0; i < nr; i++) {
		dst[i] = (double) src[i] / (double) ts_total_io_u(ts);
		dst[i] *= 100.0;
		if (dst[i] < 0.01 && src[i])
			dst[i] = 0.01;
	}
}

static void stat_calc_lat_u(struct thread_stat *ts, double *io_u_lat)
{
	stat_calc_lat(ts, io_u_lat, ts->io_u_lat_u, FIO_IO_U_LAT_U_NR);
}

static void stat_calc_lat_m(struct thread_stat *ts, double *io_u_lat)
{
	stat_calc_lat(ts, io_u_lat, ts->io_u_lat_m, FIO_IO_U_LAT_M_NR);
}

static int usec_to_msec(unsigned long *min, unsigned long *max, double *mean,
			double *dev)
{
	if (*min > 1000 && *max > 1000 && *mean > 1000.0 && *dev > 1000.0) {
		*min /= 1000;
		*max /= 1000;
		*mean /= 1000.0;
		*dev /= 1000.0;
		return 0;
	}

	return 1;
}

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)) {
		const char *base = "(usec)";
		char *minp, *maxp;

		if (!usec_to_msec(&min, &max, &mean, &dev))
			base = "(msec)";

		minp = num2str(min, 6, 1, 0);
		maxp = num2str(max, 6, 1, 0);

		log_info("    slat %s: min=%s, max=%s, avg=%5.02f, stdev=%5.02f\n", base, minp, maxp, mean, dev);

		free(minp);
		free(maxp);
	}
	if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev)) {
		const char *base = "(usec)";
		char *minp, *maxp;

		if (!usec_to_msec(&min, &max, &mean, &dev))
			base = "(msec)";

		minp = num2str(min, 6, 1, 0);
		maxp = num2str(max, 6, 1, 0);
	
		log_info("    clat %s: min=%s, max=%s, avg=%5.02f, stdev=%5.02f\n", base, minp, maxp, mean, dev);

		free(minp);
		free(maxp);
	}
	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_lat(double *io_u_lat, int nr, const char **ranges,
		     const char *msg)
{
	int new_line = 1, i, line = 0;

	for (i = 0; i < nr; i++) {
		if (io_u_lat[i] <= 0.0)
			continue;
		if (new_line) {
			if (line)
				log_info("\n");
			log_info("     lat (%s): ", msg);
			new_line = 0;
			line = 0;
		}
		if (line)
			log_info(", ");
		log_info("%s%3.2f%%", ranges[i], io_u_lat[i]);
		line++;
		if (line == 5)
			new_line = 1;
	}
}

static void show_lat_u(double *io_u_lat_u)
{
	const char *ranges[] = { "2=", "4=", "10=", "20=", "50=", "100=",
				 "250=", "500=", "750=", "1000=", };

	show_lat(io_u_lat_u, FIO_IO_U_LAT_U_NR, ranges, "usec");
}

static void show_lat_m(double *io_u_lat_m)
{
	const char *ranges[] = { "2=", "4=", "10=", "20=", "50=", "100=",
				 "250=", "500=", "750=", "1000=", "2000=",
				 ">=2000=", };

	show_lat(io_u_lat_m, FIO_IO_U_LAT_M_NR, ranges, "msec");
}

static void show_latencies(double *io_u_lat_u, double *io_u_lat_m)
{
	show_lat_u(io_u_lat_u);
	log_info("\n");
	show_lat_m(io_u_lat_m);
	log_info("\n");
}

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_u[FIO_IO_U_LAT_U_NR];
	double io_u_lat_m[FIO_IO_U_LAT_M_NR];

	if (!(ts->io_bytes[0] + ts->io_bytes[1]) &&
	    !(ts->total_io_u[0] + ts->total_io_u[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, majf=%lu, minf=%lu\n", usr_cpu, sys_cpu, ts->ctx, ts->majf, ts->minf);

	stat_calc_dist(ts, io_u_dist);
	stat_calc_lat_u(ts, io_u_lat_u);
	stat_calc_lat_m(ts, io_u_lat_m);

	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("     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]);

	show_latencies(io_u_lat_u, io_u_lat_m);
}

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_u[FIO_IO_U_LAT_U_NR];
	double io_u_lat_m[FIO_IO_U_LAT_M_NR];
	double usr_cpu, sys_cpu;
	int i;

	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;%lu;%lu", usr_cpu, sys_cpu, ts->ctx, ts->majf, ts->minf);

	stat_calc_dist(ts, io_u_dist);
	stat_calc_lat_u(ts, io_u_lat_u);
	stat_calc_lat_m(ts, io_u_lat_m);

	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]);

	for (i = 0; i < FIO_IO_U_LAT_U_NR; i++)
		log_info(";%3.2f%%", io_u_lat_u[i]);
	for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
		log_info(";%3.2f%%", io_u_lat_m[i]);
	log_info("\n");

	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;
		ts->majf += td->ts.majf;
		ts->minf += td->ts.minf;

		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_U_NR; k++)
			ts->io_u_lat_u[k] += td->ts.io_u_lat_u[k];
		for (k = 0; k < FIO_IO_U_LAT_M_NR; k++)
			ts->io_u_lat_m[k] += td->ts.io_u_lat_m[k];


		for (k = 0; k <= DDIR_WRITE; k++) {
			ts->total_io_u[k] += td->ts.total_io_u[k];
			ts->short_io_u[k] += td->ts.short_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;
	if (delta) {
		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 usec)
{
	struct thread_stat *ts = &td->ts;

	add_stat_sample(&ts->clat_stat[ddir], usec);

	if (ts->clat_log)
		add_log_sample(td, ts->clat_log, usec, ddir);
}

void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
		     unsigned long usec)
{
	struct thread_stat *ts = &td->ts;

	add_stat_sample(&ts->slat_stat[ddir], usec);

	if (ts->slat_log)
		add_log_sample(td, ts->slat_log, usec, 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];
}
Commit	Line	Data
	1	#include <stdio.h>
	2	#include <string.h>
	3	#include <sys/time.h>
	4	#include <sys/types.h>
	5	#include <sys/stat.h>
	6	#include <dirent.h>
	7	#include <libgen.h>
	8	#include <math.h>
	9
	10	#include "fio.h"
	11
	12	/*
	13	* Cheesy number->string conversion, complete with carry rounding error.
	14	*/
	15	static char *num2str(unsigned long num, int maxlen, int base, int pow2)
	16	{
	17	char postfix[] = { ' ', 'K', 'M', 'G', 'P', 'E' };
	18	unsigned int thousand;
	19	char *buf;
	20	int i;
	21
	22	if (pow2)
	23	thousand = 1024;
	24	else
	25	thousand = 1000;
	26
	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) {
	37	if (i >= 1) {
	38	buf[len] = postfix[i];
	39	buf[len + 1] = '\0';
	40	}
	41	return buf;
	42	}
	43
	44	if ((num % thousand) >= (thousand / 2))
	45	carry = 1;
	46
	47	num /= thousand;
	48	num += carry;
	49	i++;
	50	} while (i <= 5);
	51
	52	return buf;
	53	}
	54
	55	void update_rusage_stat(struct thread_data *td)
	56	{
	57	struct thread_stat *ts = &td->ts;
	58
	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);
	64	ts->minf += ts->ru_end.ru_minflt - ts->ru_start.ru_minflt;
	65	ts->majf += ts->ru_end.ru_majflt - ts->ru_start.ru_majflt;
	66
	67	memcpy(&ts->ru_start, &ts->ru_end, sizeof(ts->ru_end));
	68	}
	69
	70	static int calc_lat(struct io_stat is, unsigned long min, unsigned long *max,
	71	double mean, double dev)
	72	{
	73	double n = is->samples;
	74
	75	if (is->samples == 0)
	76	return 0;
	77
	78	*min = is->min_val;
	79	*max = is->max_val;
	80
	81	n = (double) is->samples;
	82	*mean = is->mean;
	83
	84	if (n > 1.0)
	85	*dev = sqrt(is->S / (n - 1.0));
	86	else
	87	*dev = 0;
	88
	89	return 1;
	90	}
	91
	92	static void show_group_stats(struct group_run_stats *rs, int id)
	93	{
	94	char p1, p2, p3, p4;
	95	const char *ddir_str[] = { " READ", " WRITE" };
	96	int i;
	97
	98	log_info("\nRun status group %d (all jobs):\n", id);
	99
	100	for (i = 0; i <= DDIR_WRITE; i++) {
	101	if (!rs->max_run[i])
	102	continue;
	103
	104	p1 = num2str(rs->io_kb[i], 6, 1000, 1);
	105	p2 = num2str(rs->agg[i], 6, 1000, 1);
	106	p3 = num2str(rs->min_bw[i], 6, 1000, 1);
	107	p4 = num2str(rs->max_bw[i], 6, 1000, 1);
	108
	109	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]);
	110
	111	free(p1);
	112	free(p2);
	113	free(p3);
	114	free(p4);
	115	}
	116	}
	117
	118	#define ts_total_io_u(ts) \
	119	((ts)->total_io_u[0] + (ts)->total_io_u[1])
	120
	121	static void stat_calc_dist(struct thread_stat ts, double io_u_dist)
	122	{
	123	int i;
	124
	125	/*
	126	* Do depth distribution calculations
	127	*/
	128	for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
	129	io_u_dist[i] = (double) ts->io_u_map[i] / (double) ts_total_io_u(ts);
	130	io_u_dist[i] *= 100.0;
	131	if (io_u_dist[i] < 0.1 && ts->io_u_map[i])
	132	io_u_dist[i] = 0.1;
	133	}
	134	}
	135
	136	static void stat_calc_lat(struct thread_stat ts, double dst,
	137	unsigned int *src, int nr)
	138	{
	139	int i;
	140
	141	/*
	142	* Do latency distribution calculations
	143	*/
	144	for (i = 0; i < nr; i++) {
	145	dst[i] = (double) src[i] / (double) ts_total_io_u(ts);
	146	dst[i] *= 100.0;
	147	if (dst[i] < 0.01 && src[i])
	148	dst[i] = 0.01;
	149	}
	150	}
	151
	152	static void stat_calc_lat_u(struct thread_stat ts, double io_u_lat)
	153	{
	154	stat_calc_lat(ts, io_u_lat, ts->io_u_lat_u, FIO_IO_U_LAT_U_NR);
	155	}
	156
	157	static void stat_calc_lat_m(struct thread_stat ts, double io_u_lat)
	158	{
	159	stat_calc_lat(ts, io_u_lat, ts->io_u_lat_m, FIO_IO_U_LAT_M_NR);
	160	}
	161
	162	static int usec_to_msec(unsigned long min, unsigned long max, double *mean,
	163	double *dev)
	164	{
	165	if (min > 1000 && max > 1000 && mean > 1000.0 && dev > 1000.0) {
	166	*min /= 1000;
	167	*max /= 1000;
	168	*mean /= 1000.0;
	169	*dev /= 1000.0;
	170	return 0;
	171	}
	172
	173	return 1;
	174	}
	175
	176	static void show_ddir_status(struct group_run_stats rs, struct thread_stat ts,
	177	int ddir)
	178	{
	179	const char *ddir_str[] = { "read ", "write" };
	180	unsigned long min, max;
	181	unsigned long long bw, iops;
	182	double mean, dev;
	183	char io_p, bw_p, *iops_p;
	184
	185	if (!ts->runtime[ddir])
	186	return;
	187
	188	bw = ts->io_bytes[ddir] / ts->runtime[ddir];
	189	iops = (1000 * ts->total_io_u[ddir]) / ts->runtime[ddir];
	190	io_p = num2str(ts->io_bytes[ddir] >> 10, 6, 1000, 1);
	191	bw_p = num2str(bw, 6, 1000, 1);
	192	iops_p = num2str(iops, 6, 1, 0);
	193
	194	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]);
	195
	196	free(io_p);
	197	free(bw_p);
	198	free(iops_p);
	199
	200	if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev)) {
	201	const char *base = "(usec)";
	202	char minp, maxp;
	203
	204	if (!usec_to_msec(&min, &max, &mean, &dev))
	205	base = "(msec)";
	206
	207	minp = num2str(min, 6, 1, 0);
	208	maxp = num2str(max, 6, 1, 0);
	209
	210	log_info(" slat %s: min=%s, max=%s, avg=%5.02f, stdev=%5.02f\n", base, minp, maxp, mean, dev);
	211
	212	free(minp);
	213	free(maxp);
	214	}
	215	if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev)) {
	216	const char *base = "(usec)";
	217	char minp, maxp;
	218
	219	if (!usec_to_msec(&min, &max, &mean, &dev))
	220	base = "(msec)";
	221
	222	minp = num2str(min, 6, 1, 0);
	223	maxp = num2str(max, 6, 1, 0);
	224
	225	log_info(" clat %s: min=%s, max=%s, avg=%5.02f, stdev=%5.02f\n", base, minp, maxp, mean, dev);
	226
	227	free(minp);
	228	free(maxp);
	229	}
	230	if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
	231	double p_of_agg;
	232
	233	p_of_agg = mean * 100 / (double) rs->agg[ddir];
	234	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);
	235	}
	236	}
	237
	238	static void show_lat(double io_u_lat, int nr, const char *ranges,
	239	const char *msg)
	240	{
	241	int new_line = 1, i, line = 0;
	242
	243	for (i = 0; i < nr; i++) {
	244	if (io_u_lat[i] <= 0.0)
	245	continue;
	246	if (new_line) {
	247	if (line)
	248	log_info("\n");
	249	log_info(" lat (%s): ", msg);
	250	new_line = 0;
	251	line = 0;
	252	}
	253	if (line)
	254	log_info(", ");
	255	log_info("%s%3.2f%%", ranges[i], io_u_lat[i]);
	256	line++;
	257	if (line == 5)
	258	new_line = 1;
	259	}
	260	}
	261
	262	static void show_lat_u(double *io_u_lat_u)
	263	{
	264	const char *ranges[] = { "2=", "4=", "10=", "20=", "50=", "100=",
	265	"250=", "500=", "750=", "1000=", };
	266
	267	show_lat(io_u_lat_u, FIO_IO_U_LAT_U_NR, ranges, "usec");
	268	}
	269
	270	static void show_lat_m(double *io_u_lat_m)
	271	{
	272	const char *ranges[] = { "2=", "4=", "10=", "20=", "50=", "100=",
	273	"250=", "500=", "750=", "1000=", "2000=",
	274	">=2000=", };
	275
	276	show_lat(io_u_lat_m, FIO_IO_U_LAT_M_NR, ranges, "msec");
	277	}
	278
	279	static void show_latencies(double io_u_lat_u, double io_u_lat_m)
	280	{
	281	show_lat_u(io_u_lat_u);
	282	log_info("\n");
	283	show_lat_m(io_u_lat_m);
	284	log_info("\n");
	285	}
	286
	287	static void show_thread_status(struct thread_stat *ts,
	288	struct group_run_stats *rs)
	289	{
	290	double usr_cpu, sys_cpu;
	291	unsigned long runtime;
	292	double io_u_dist[FIO_IO_U_MAP_NR];
	293	double io_u_lat_u[FIO_IO_U_LAT_U_NR];
	294	double io_u_lat_m[FIO_IO_U_LAT_M_NR];
	295
	296	if (!(ts->io_bytes[0] + ts->io_bytes[1]) &&
	297	!(ts->total_io_u[0] + ts->total_io_u[1]))
	298	return;
	299
	300	if (!ts->error)
	301	log_info("%s: (groupid=%d, jobs=%d): err=%2d: pid=%d\n", ts->name, ts->groupid, ts->members, ts->error, ts->pid);
	302	else
	303	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);
	304
	305	if (ts->description)
	306	log_info(" Description : [%s]\n", ts->description);
	307
	308	if (ts->io_bytes[DDIR_READ])
	309	show_ddir_status(rs, ts, DDIR_READ);
	310	if (ts->io_bytes[DDIR_WRITE])
	311	show_ddir_status(rs, ts, DDIR_WRITE);
	312
	313	runtime = ts->total_run_time;
	314	if (runtime) {
	315	double runt = (double) runtime;
	316
	317	usr_cpu = (double) ts->usr_time * 100 / runt;
	318	sys_cpu = (double) ts->sys_time * 100 / runt;
	319	} else {
	320	usr_cpu = 0;
	321	sys_cpu = 0;
	322	}
	323
	324	log_info(" cpu : usr=%3.2f%%, sys=%3.2f%%, ctx=%lu, majf=%lu, minf=%lu\n", usr_cpu, sys_cpu, ts->ctx, ts->majf, ts->minf);
	325
	326	stat_calc_dist(ts, io_u_dist);
	327	stat_calc_lat_u(ts, io_u_lat_u);
	328	stat_calc_lat_m(ts, io_u_lat_m);
	329
	330	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]);
	331	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]);
	332
	333	show_latencies(io_u_lat_u, io_u_lat_m);
	334	}
	335
	336	static void show_ddir_status_terse(struct thread_stat *ts,
	337	struct group_run_stats *rs, int ddir)
	338	{
	339	unsigned long min, max;
	340	unsigned long long bw;
	341	double mean, dev;
	342
	343	bw = 0;
	344	if (ts->runtime[ddir])
	345	bw = ts->io_bytes[ddir] / ts->runtime[ddir];
	346
	347	log_info(";%llu;%llu;%lu", ts->io_bytes[ddir] >> 10, bw, ts->runtime[ddir]);
	348
	349	if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
	350	log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
	351	else
	352	log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
	353
	354	if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev))
	355	log_info(";%lu;%lu;%f;%f", min, max, mean, dev);
	356	else
	357	log_info(";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
	358
	359	if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
	360	double p_of_agg;
	361
	362	p_of_agg = mean * 100 / (double) rs->agg[ddir];
	363	log_info(";%lu;%lu;%f%%;%f;%f", min, max, p_of_agg, mean, dev);
	364	} else
	365	log_info(";%lu;%lu;%f%%;%f;%f", 0UL, 0UL, 0.0, 0.0, 0.0);
	366	}
	367
	368
	369	static void show_thread_status_terse(struct thread_stat *ts,
	370	struct group_run_stats *rs)
	371	{
	372	double io_u_dist[FIO_IO_U_MAP_NR];
	373	double io_u_lat_u[FIO_IO_U_LAT_U_NR];
	374	double io_u_lat_m[FIO_IO_U_LAT_M_NR];
	375	double usr_cpu, sys_cpu;
	376	int i;
	377
	378	log_info("%s;%d;%d", ts->name, ts->groupid, ts->error);
	379
	380	show_ddir_status_terse(ts, rs, 0);
	381	show_ddir_status_terse(ts, rs, 1);
	382
	383	if (ts->total_run_time) {
	384	double runt = (double) ts->total_run_time;
	385
	386	usr_cpu = (double) ts->usr_time * 100 / runt;
	387	sys_cpu = (double) ts->sys_time * 100 / runt;
	388	} else {
	389	usr_cpu = 0;
	390	sys_cpu = 0;
	391	}
	392
	393	log_info(";%f%%;%f%%;%lu;%lu;%lu", usr_cpu, sys_cpu, ts->ctx, ts->majf, ts->minf);
	394
	395	stat_calc_dist(ts, io_u_dist);
	396	stat_calc_lat_u(ts, io_u_lat_u);
	397	stat_calc_lat_m(ts, io_u_lat_m);
	398
	399	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]);
	400
	401	for (i = 0; i < FIO_IO_U_LAT_U_NR; i++)
	402	log_info(";%3.2f%%", io_u_lat_u[i]);
	403	for (i = 0; i < FIO_IO_U_LAT_M_NR; i++)
	404	log_info(";%3.2f%%", io_u_lat_m[i]);
	405	log_info("\n");
	406
	407	if (ts->description)
	408	log_info(";%s", ts->description);
	409
	410	log_info("\n");
	411	}
	412
	413	static void sum_stat(struct io_stat dst, struct io_stat src, int nr)
	414	{
	415	double mean, S;
	416
	417	dst->min_val = min(dst->min_val, src->min_val);
	418	dst->max_val = max(dst->max_val, src->max_val);
	419	dst->samples += src->samples;
	420
	421	/*
	422	* Needs a new method for calculating stddev, we cannot just
	423	* average them we do below for nr > 1
	424	*/
	425	if (nr == 1) {
	426	mean = src->mean;
	427	S = src->S;
	428	} else {
	429	mean = ((src->mean * (double) (nr - 1)) + dst->mean) / ((double) nr);
	430	S = ((src->S * (double) (nr - 1)) + dst->S) / ((double) nr);
	431	}
	432
	433	dst->mean = mean;
	434	dst->S = S;
	435	}
	436
	437	void show_run_stats(void)
	438	{
	439	struct group_run_stats runstats, rs;
	440	struct thread_data *td;
	441	struct thread_stat threadstats, ts;
	442	int i, j, k, l, nr_ts, last_ts, idx;
	443
	444	runstats = malloc(sizeof(struct group_run_stats) * (groupid + 1));
	445
	446	for (i = 0; i < groupid + 1; i++) {
	447	rs = &runstats[i];
	448
	449	memset(rs, 0, sizeof(*rs));
	450	rs->min_bw[0] = rs->min_run[0] = ~0UL;
	451	rs->min_bw[1] = rs->min_run[1] = ~0UL;
	452	}
	453
	454	/*
	455	* find out how many threads stats we need. if group reporting isn't
	456	* enabled, it's one-per-td.
	457	*/
	458	nr_ts = 0;
	459	last_ts = -1;
	460	for_each_td(td, i) {
	461	if (!td->o.group_reporting) {
	462	nr_ts++;
	463	continue;
	464	}
	465	if (last_ts == td->groupid)
	466	continue;
	467
	468	last_ts = td->groupid;
	469	nr_ts++;
	470	}
	471
	472	threadstats = malloc(nr_ts * sizeof(struct thread_stat));
	473
	474	for (i = 0; i < nr_ts; i++) {
	475	ts = &threadstats[i];
	476
	477	memset(ts, 0, sizeof(*ts));
	478	for (j = 0; j <= DDIR_WRITE; j++) {
	479	ts->clat_stat[j].min_val = -1UL;
	480	ts->slat_stat[j].min_val = -1UL;
	481	ts->bw_stat[j].min_val = -1UL;
	482	}
	483	ts->groupid = -1;
	484	}
	485
	486	j = 0;
	487	last_ts = -1;
	488	idx = 0;
	489	for_each_td(td, i) {
	490	if (idx && (!td->o.group_reporting \|\|
	491	(td->o.group_reporting && last_ts != td->groupid))) {
	492	idx = 0;
	493	j++;
	494	}
	495
	496	last_ts = td->groupid;
	497
	498	ts = &threadstats[j];
	499
	500	idx++;
	501	ts->members++;
	502
	503	if (ts->groupid == -1) {
	504	/*
	505	* These are per-group shared already
	506	*/
	507	ts->name = td->o.name;
	508	ts->description = td->o.description;
	509	ts->groupid = td->groupid;
	510
	511	/*
	512	* first pid in group, not very useful...
	513	*/
	514	ts->pid = td->pid;
	515	}
	516
	517	if (td->error && !ts->error) {
	518	ts->error = td->error;
	519	ts->verror = td->verror;
	520	}
	521
	522	for (l = 0; l <= DDIR_WRITE; l++) {
	523	sum_stat(&ts->clat_stat[l], &td->ts.clat_stat[l], idx);
	524	sum_stat(&ts->slat_stat[l], &td->ts.slat_stat[l], idx);
	525	sum_stat(&ts->bw_stat[l], &td->ts.bw_stat[l], idx);
	526
	527	ts->stat_io_bytes[l] += td->ts.stat_io_bytes[l];
	528	ts->io_bytes[l] += td->ts.io_bytes[l];
	529
	530	if (ts->runtime[l] < td->ts.runtime[l])
	531	ts->runtime[l] = td->ts.runtime[l];
	532	}
	533
	534	ts->usr_time += td->ts.usr_time;
	535	ts->sys_time += td->ts.sys_time;
	536	ts->ctx += td->ts.ctx;
	537	ts->majf += td->ts.majf;
	538	ts->minf += td->ts.minf;
	539
	540	for (k = 0; k < FIO_IO_U_MAP_NR; k++)
	541	ts->io_u_map[k] += td->ts.io_u_map[k];
	542	for (k = 0; k < FIO_IO_U_LAT_U_NR; k++)
	543	ts->io_u_lat_u[k] += td->ts.io_u_lat_u[k];
	544	for (k = 0; k < FIO_IO_U_LAT_M_NR; k++)
	545	ts->io_u_lat_m[k] += td->ts.io_u_lat_m[k];
	546
	547
	548	for (k = 0; k <= DDIR_WRITE; k++) {
	549	ts->total_io_u[k] += td->ts.total_io_u[k];
	550	ts->short_io_u[k] += td->ts.short_io_u[k];
	551	}
	552
	553	ts->total_run_time += td->ts.total_run_time;
	554	}
	555
	556	for (i = 0; i < nr_ts; i++) {
	557	unsigned long long bw;
	558
	559	ts = &threadstats[i];
	560	rs = &runstats[ts->groupid];
	561
	562	for (j = 0; j <= DDIR_WRITE; j++) {
	563	if (!ts->runtime[j])
	564	continue;
	565	if (ts->runtime[j] < rs->min_run[j] \|\| !rs->min_run[j])
	566	rs->min_run[j] = ts->runtime[j];
	567	if (ts->runtime[j] > rs->max_run[j])
	568	rs->max_run[j] = ts->runtime[j];
	569
	570	bw = 0;
	571	if (ts->runtime[j])
	572	bw = ts->io_bytes[j] / (unsigned long long) ts->runtime[j];
	573	if (bw < rs->min_bw[j])
	574	rs->min_bw[j] = bw;
	575	if (bw > rs->max_bw[j])
	576	rs->max_bw[j] = bw;
	577
	578	rs->io_kb[j] += ts->io_bytes[j] >> 10;
	579	}
	580	}
	581
	582	for (i = 0; i < groupid + 1; i++) {
	583	rs = &runstats[i];
	584
	585	if (rs->max_run[0])
	586	rs->agg[0] = (rs->io_kb[0]*1024) / rs->max_run[0];
	587	if (rs->max_run[1])
	588	rs->agg[1] = (rs->io_kb[1]*1024) / rs->max_run[1];
	589	}
	590
	591	/*
	592	* don't overwrite last signal output
	593	*/
	594	if (!terse_output)
	595	printf("\n");
	596
	597	for (i = 0; i < nr_ts; i++) {
	598	ts = &threadstats[i];
	599	rs = &runstats[ts->groupid];
	600
	601	if (terse_output)
	602	show_thread_status_terse(ts, rs);
	603	else
	604	show_thread_status(ts, rs);
	605	}
	606
	607	if (!terse_output) {
	608	for (i = 0; i < groupid + 1; i++)
	609	show_group_stats(&runstats[i], i);
	610
	611	show_disk_util();
	612	}
	613
	614	free(runstats);
	615	free(threadstats);
	616	}
	617
	618	static inline void add_stat_sample(struct io_stat *is, unsigned long data)
	619	{
	620	double val = data;
	621	double delta;
	622
	623	if (data > is->max_val)
	624	is->max_val = data;
	625	if (data < is->min_val)
	626	is->min_val = data;
	627
	628	delta = val - is->mean;
	629	if (delta) {
	630	is->mean += delta / (is->samples + 1.0);
	631	is->S += delta * (val - is->mean);
	632	}
	633
	634	is->samples++;
	635	}
	636
	637	static void __add_log_sample(struct io_log *iolog, unsigned long val,
	638	enum fio_ddir ddir, unsigned long time)
	639	{
	640	if (iolog->nr_samples == iolog->max_samples) {
	641	int new_size = sizeof(struct io_sample) * iolog->max_samples*2;
	642
	643	iolog->log = realloc(iolog->log, new_size);
	644	iolog->max_samples <<= 1;
	645	}
	646
	647	iolog->log[iolog->nr_samples].val = val;
	648	iolog->log[iolog->nr_samples].time = time;
	649	iolog->log[iolog->nr_samples].ddir = ddir;
	650	iolog->nr_samples++;
	651	}
	652
	653	static void add_log_sample(struct thread_data td, struct io_log iolog,
	654	unsigned long val, enum fio_ddir ddir)
	655	{
	656	__add_log_sample(iolog, val, ddir, mtime_since_now(&td->epoch));
	657	}
	658
	659	void add_agg_sample(unsigned long val, enum fio_ddir ddir)
	660	{
	661	struct io_log *iolog = agg_io_log[ddir];
	662
	663	__add_log_sample(iolog, val, ddir, mtime_since_genesis());
	664	}
	665
	666	void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
	667	unsigned long usec)
	668	{
	669	struct thread_stat *ts = &td->ts;
	670
	671	add_stat_sample(&ts->clat_stat[ddir], usec);
	672
	673	if (ts->clat_log)
	674	add_log_sample(td, ts->clat_log, usec, ddir);
	675	}
	676
	677	void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
	678	unsigned long usec)
	679	{
	680	struct thread_stat *ts = &td->ts;
	681
	682	add_stat_sample(&ts->slat_stat[ddir], usec);
	683
	684	if (ts->slat_log)
	685	add_log_sample(td, ts->slat_log, usec, ddir);
	686	}
	687
	688	void add_bw_sample(struct thread_data *td, enum fio_ddir ddir,
	689	struct timeval *t)
	690	{
	691	struct thread_stat *ts = &td->ts;
	692	unsigned long spent = mtime_since(&ts->stat_sample_time[ddir], t);
	693	unsigned long rate;
	694
	695	if (spent < td->o.bw_avg_time)
	696	return;
	697
	698	rate = (td->this_io_bytes[ddir] - ts->stat_io_bytes[ddir]) / spent;
	699	add_stat_sample(&ts->bw_stat[ddir], rate);
	700
	701	if (ts->bw_log)
	702	add_log_sample(td, ts->bw_log, rate, ddir);
	703
	704	fio_gettime(&ts->stat_sample_time[ddir], NULL);
	705	ts->stat_io_bytes[ddir] = td->this_io_bytes[ddir];
	706	}