X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=stat.c;h=681d5cbc47e9b90c85391738554a15da3623be35;hp=60d5260058b134506eee5aba2d5a22593ae44f7c;hb=94370ac42ddee6572c434073d3c1840a513bc8f4;hpb=01452055af61d6f5de543575dba3ebb0c9e55fab

diff --git a/stat.c b/stat.c
index 60d52600..681d5cbc 100644
--- a/stat.c
+++ b/stat.c
@@ -2,6 +2,7 @@
 #include <string.h>
 #include <sys/time.h>
 #include <sys/types.h>
+#include <sys/stat.h>
 #include <dirent.h>
 #include <libgen.h>
 #include <math.h>
@@ -9,7 +10,48 @@
 #include "fio.h"
 
 static struct itimerval itimer;
-static LIST_HEAD(disk_list);
+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)
+{
+	/*
+	 * could be passed in for 10^3 base, but every caller expects
+	 * 2^10 base right now.
+	 */
+	const unsigned int thousand = 1024;
+	char postfix[] = { 'K', 'M', 'G', 'P', 'E' };
+	char *buf;
+	int i;
+
+	buf = malloc(128);
+
+	for (i = 0; base > 1; i++)
+		base /= thousand;
+
+	do {
+		int len, carry = 0;
+
+		len = sprintf(buf, "%'lu", num);
+		if (len <= maxlen) {
+			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)
 {
@@ -59,7 +101,7 @@ static void update_io_tick_disk(struct disk_util *du)
 	dus->io_ticks += (__dus.io_ticks - ldus->io_ticks);
 	dus->time_in_queue += (__dus.time_in_queue - ldus->time_in_queue);
 
-	gettimeofday(&t, NULL);
+	fio_gettime(&t, NULL);
 	du->msec += mtime_since(&du->time, &t);
 	memcpy(&du->time, &t, sizeof(t));
 	memcpy(ldus, &__dus, sizeof(__dus));
@@ -93,15 +135,27 @@ static int disk_util_exists(dev_t dev)
 
 static void disk_util_add(dev_t dev, char *path)
 {
-	struct disk_util *du = malloc(sizeof(*du));
+	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;
 
-	gettimeofday(&du->time, NULL);
+	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);
@@ -155,8 +209,6 @@ static int find_block_dir(dev_t dev, char *path)
 
 		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);
 
@@ -167,7 +219,7 @@ static int find_block_dir(dev_t dev, char *path)
 			}
 		}
 
-		if (stat(full_path, &st) == -1) {
+		if (lstat(full_path, &st) == -1) {
 			perror("stat");
 			break;
 		}
@@ -188,15 +240,20 @@ static int find_block_dir(dev_t dev, char *path)
 
 void init_disk_util(struct thread_data *td)
 {
+	struct fio_file *f;
 	struct stat st;
-	char foo[256], tmp[256];
+	char foo[PATH_MAX], tmp[PATH_MAX];
 	dev_t dev;
 	char *p;
 
-	if (!td->do_disk_util)
+	if (!td->do_disk_util || (td->io_ops->flags & FIO_DISKLESSIO))
 		return;
 
-	if (!stat(td->file_name, &st)) {
+	/*
+	 * Just use the same file, they are on the same device.
+	 */
+	f = &td->files[0];
+	if (!stat(f->file_name, &st)) {
 		if (S_ISBLK(st.st_mode))
 			dev = st.st_rdev;
 		else
@@ -205,7 +262,7 @@ void init_disk_util(struct thread_data *td)
 		/*
 		 * must be a file, open "." in that path
 		 */
-		strcpy(foo, td->file_name);
+		strncpy(foo, f->file_name, PATH_MAX - 1);
 		p = dirname(foo);
 		if (stat(p, &st)) {
 			perror("disk util stat");
@@ -217,6 +274,17 @@ void init_disk_util(struct thread_data *td)
 
 	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))
@@ -232,13 +300,16 @@ void init_disk_util(struct thread_data *td)
 		p = dirname(foo);
 		sprintf(tmp, "%s/queue", p);
 		if (stat(tmp, &st)) {
-			fprintf(stderr, "unknown sysfs layout\n");
+			log_err("unknown sysfs layout\n");
 			return;
 		}
-		sprintf(foo, "%s", p);
+		strncpy(tmp, p, PATH_MAX - 1);
+		sprintf(foo, "%s", tmp);
 	}
 
-	td->sysfs_root = strdup(foo);
+	if (td->ioscheduler)
+		td->sysfs_root = strdup(foo);
+
 	disk_util_add(dev, foo);
 }
 
@@ -251,23 +322,21 @@ void disk_util_timer_arm(void)
 
 void update_rusage_stat(struct thread_data *td)
 {
-	if (!(td->runtime[0] + td->runtime[1]))
-		return;
+	struct thread_stat *ts = &td->ts;
 
-	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);
+	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(&td->ru_start, &td->ru_end, sizeof(td->ru_end));
+	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;
+	double n = is->samples;
 
 	if (is->samples == 0)
 		return 0;
@@ -276,32 +345,50 @@ static int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max,
 	*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;
+	*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)
 {
-	printf("\nRun status group %d (all jobs):\n", id);
+	char *p1, *p2, *p3, *p4;
+	const char *ddir_str[] = { "   READ", "  WRITE" };
+	int i;
+
+	fprintf(f_out, "\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]);
+	for (i = 0; i <= DDIR_WRITE; i++) {
+		if (!rs->max_run[i])
+			continue;
+
+		p1 = num2str(rs->io_kb[i], 6, 1);
+		p2 = num2str(rs->agg[i], 6, 1);
+		p3 = num2str(rs->min_bw[i], 6, 1);
+		p4 = num2str(rs->max_bw[i], 6, 1);
+
+		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]);
+
+		free(p1);
+		free(p2);
+		free(p3);
+		free(p4);
+	}
 }
 
 static void show_disk_util(void)
 {
 	struct disk_util_stat *dus;
-	struct list_head *entry;
+	struct list_head *entry, *next;
 	struct disk_util *du;
 	double util;
 
-	printf("\nDisk stats (read/write):\n");
+	fprintf(f_out, "\nDisk stats (read/write):\n");
 
 	list_for_each(entry, &disk_list) {
 		du = list_entry(entry, struct disk_util, list);
@@ -311,70 +398,234 @@ static void show_disk_util(void)
 		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);
+		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);
+	}
+
+	/*
+	 * 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);
+	}
+}
+
+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;
+		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;
+		io_u_lat[i] *= 100.0;
 	}
 }
 
-static void show_ddir_status(struct thread_data *td, struct group_run_stats *rs,
+static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
 			     int ddir)
 {
-	char *ddir_str[] = { "read ", "write" };
+	const char *ddir_str[] = { "read ", "write" };
 	unsigned long min, max;
 	unsigned long long bw;
 	double mean, dev;
+	char *io_p, *bw_p;
 
-	if (!td->runtime[ddir])
+	if (!ts->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]);
+	bw = ts->io_bytes[ddir] / ts->runtime[ddir];
+	io_p = num2str(ts->io_bytes[ddir] >> 10, 6, 1);
+	bw_p = num2str(bw, 6, 1);
+
+	fprintf(f_out, "  %s: io=%siB, bw=%siB/s, runt=%6lumsec\n", ddir_str[ddir], io_p, bw_p, ts->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);
+	free(io_p);
+	free(bw_p);
 
-	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(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
+		fprintf(f_out, "    slat (msec): min=%5lu, max=%5lu, avg=%5.02f, stdev=%5.02f\n", min, max, mean, dev);
 
-	if (calc_lat(&td->bw_stat[ddir], &min, &max, &mean, &dev)) {
+	if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev))
+		fprintf(f_out, "    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];
-		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);
+		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);
 	}
 }
 
-static void show_thread_status(struct thread_data *td,
+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 (!(td->io_bytes[0] + td->io_bytes[1]) && !td->error)
+	if (!(ts->io_bytes[0] + ts->io_bytes[1]))
 		return;
 
-	printf("%s: (groupid=%d): err=%2d:\n",td->name, td->groupid, td->error);
+	if (!ts->error)
+		fprintf(f_out, "%s: (groupid=%d, jobs=%d): err=%2d: pid=%d\n", ts->name, ts->groupid, ts->members, ts->error, ts->pid);
+	else
+		fprintf(f_out, "%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)
+		fprintf(f_out, "  Description  : [%s]\n", ts->description);
 
-	show_ddir_status(td, rs, td->ddir);
-	if (td->io_bytes[td->ddir ^ 1])
-		show_ddir_status(td, rs, td->ddir ^ 1);
+	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);
 
-	if (td->runtime[0] + td->runtime[1]) {
-		double runt = td->runtime[0] + td->runtime[1];
+	runtime = ts->total_run_time;
+	if (runtime) {
+		double runt = (double) runtime;
 
-		usr_cpu = (double) td->usr_time * 100 / runt;
-		sys_cpu = (double) td->sys_time * 100 / runt;
+		usr_cpu = (double) ts->usr_time * 100 / runt;
+		sys_cpu = (double) ts->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);
+	fprintf(f_out, "  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);
+
+	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]);
+
+	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]);
+	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]);
+}
+
+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];
+
+	fprintf(f_out, ";%llu;%llu;%lu", ts->io_bytes[ddir] >> 10, bw, ts->runtime[ddir]);
+
+	if (calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev))
+		fprintf(f_out, ";%lu;%lu;%f;%f", min, max, mean, dev);
+	else
+		fprintf(f_out, ";%lu;%lu;%f;%f", 0UL, 0UL, 0.0, 0.0);
+
+	if (calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev))
+		fprintf(f_out, ";%lu;%lu;%f;%f", min, max, mean, dev);
+	else
+		fprintf(f_out, ";%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];
+		fprintf(f_out, ";%lu;%lu;%f%%;%f;%f", min, max, p_of_agg, mean, dev);
+	} else
+		fprintf(f_out, ";%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;
+
+	fprintf(f_out, "%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;
+	}
+
+	fprintf(f_out, ";%f%%;%f%%;%lu", usr_cpu, sys_cpu, ts->ctx);
+
+	stat_calc_dist(ts, io_u_dist);
+	stat_calc_lat(ts, io_u_lat);
+
+	fprintf(f_out, ";%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]);
+
+	fprintf(f_out, ";%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]);
+	fprintf(f_out, ";%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)
+		fprintf(f_out, ";%s", ts->description);
+
+	fprintf(f_out, "\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;
+}
+
+static void sum_stat(struct io_stat *dst, struct io_stat *src, int nr)
+{
+	__sum_stat(&dst[DDIR_READ], &src[DDIR_READ], nr);
+	__sum_stat(&dst[DDIR_WRITE], &src[DDIR_WRITE], nr);
 }
 
 void show_run_stats(void)
 {
 	struct group_run_stats *runstats, *rs;
 	struct thread_data *td;
-	int i;
+	struct thread_stat *threadstats, *ts;
+	int i, j, k, nr_ts, last_ts, members;
 
 	runstats = malloc(sizeof(struct group_run_stats) * (groupid + 1));
 
@@ -386,44 +637,133 @@ void show_run_stats(void)
 		rs->min_bw[1] = rs->min_run[1] = ~0UL;
 	}
 
-	for (i = 0; i < thread_number; i++) {
-		unsigned long long rbw, wbw;
+	/*
+	 * 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->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));
+		ts->clat_stat[0].min_val = -1UL;
+		ts->clat_stat[1].min_val = -1UL;
+		ts->slat_stat[0].min_val = -1UL;
+		ts->slat_stat[1].min_val = -1UL;
+		ts->bw_stat[0].min_val = -1UL;
+		ts->bw_stat[1].min_val = -1UL;
+	}
+
+	j = 0;
+	last_ts = -1;
+	members = 0;
+	for_each_td(td, i) {
+		ts = &threadstats[j];
+
+		members++;
+		ts->members++;
+
+		if (!ts->groupid) {
+			/*
+			 * These are per-group shared already
+			 */
+			ts->name = td->name;
+			ts->description = td->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;
+		}
+
+		sum_stat(ts->clat_stat, td->ts.clat_stat, members);
+		sum_stat(ts->slat_stat, td->ts.slat_stat, members);
+		sum_stat(ts->bw_stat, td->ts.bw_stat, members);
+
+		ts->stat_io_bytes[0] += td->ts.stat_io_bytes[0];
+		ts->stat_io_bytes[1] += td->ts.stat_io_bytes[1];
+
+		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];
+
+		ts->total_io_u += td->ts.total_io_u;
+		ts->io_bytes[0] += td->ts.io_bytes[0];
+		ts->io_bytes[1] += td->ts.io_bytes[1];
 
-		td = &threads[i];
+		if (ts->runtime[0] < td->ts.runtime[0])
+			ts->runtime[0] = td->ts.runtime[0];
+		if (ts->runtime[1] < td->ts.runtime[1])
+			ts->runtime[1] = td->ts.runtime[1];
 
-		if (td->error) {
-			printf("%s: %s\n", td->name, td->verror);
+		ts->total_run_time += td->ts.total_run_time;
+
+		if (!td->group_reporting) {
+			members = 0;
+			j++;
 			continue;
 		}
+		if (last_ts == td->groupid)
+			continue;
+
+		if (last_ts != -1) {
+			members = 0;
+			j++;
+		}
+
+		last_ts = td->groupid;
+	}
 
-		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 < nr_ts; i++) {
+		unsigned long long bw;
+
+		ts = &threadstats[i];
+		rs = &runstats[ts->groupid];
+
+		for (j = 0; j < 2; 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++) {
@@ -438,35 +778,49 @@ void show_run_stats(void)
 	/*
 	 * don't overwrite last signal output
 	 */
-	printf("\n");
+	if (!terse_output)
+		printf("\n");
 
-	for (i = 0; i < thread_number; i++) {
-		td = &threads[i];
-		rs = &runstats[td->groupid];
+	for (i = 0; i < nr_ts; i++) {
+		ts = &threadstats[i];
+		rs = &runstats[ts->groupid];
 
-		show_thread_status(td, rs);
+		if (terse_output)
+			show_thread_status_terse(ts, rs);
+		else
+			show_thread_status(ts, rs);
 	}
 
-	for (i = 0; i < groupid + 1; i++)
-		show_group_stats(&runstats[i], i);
+	if (!terse_output) {
+		for (i = 0; i < groupid + 1; i++)
+			show_group_stats(&runstats[i], i);
+
+		show_disk_util();
+	}
 
-	show_disk_util();
+	free(runstats);
+	free(threadstats);
 }
 
-static inline void add_stat_sample(struct io_stat *is, unsigned long val)
+static inline void add_stat_sample(struct io_stat *is, unsigned long data)
 {
-	if (val > is->max_val)
-		is->max_val = val;
-	if (val < is->min_val)
-		is->min_val = val;
+	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->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)
+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;
@@ -476,43 +830,62 @@ static void add_log_sample(struct thread_data *td, struct io_log *iolog,
 	}
 
 	iolog->log[iolog->nr_samples].val = val;
-	iolog->log[iolog->nr_samples].time = mtime_since_now(&td->epoch);
+	iolog->log[iolog->nr_samples].time = time;
 	iolog->log[iolog->nr_samples].ddir = ddir;
 	iolog->nr_samples++;
 }
 
-void add_clat_sample(struct thread_data *td, int ddir, unsigned long msec)
+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)
 {
-	add_stat_sample(&td->clat_stat[ddir], msec);
+	struct thread_stat *ts = &td->ts;
+
+	add_stat_sample(&ts->clat_stat[ddir], msec);
 
-	if (td->clat_log)
-		add_log_sample(td, td->clat_log, msec, ddir);
+	if (ts->clat_log)
+		add_log_sample(td, ts->clat_log, msec, ddir);
 }
 
-void add_slat_sample(struct thread_data *td, int ddir, unsigned long msec)
+void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
+		     unsigned long msec)
 {
-	add_stat_sample(&td->slat_stat[ddir], msec);
+	struct thread_stat *ts = &td->ts;
+
+	add_stat_sample(&ts->slat_stat[ddir], msec);
 
-	if (td->slat_log)
-		add_log_sample(td, td->slat_log, msec, ddir);
+	if (ts->slat_log)
+		add_log_sample(td, ts->slat_log, msec, ddir);
 }
 
-void add_bw_sample(struct thread_data *td, int ddir)
+void add_bw_sample(struct thread_data *td, enum fio_ddir ddir,
+		   struct timeval *t)
 {
-	unsigned long spent = mtime_since_now(&td->stat_sample_time[ddir]);
+	struct thread_stat *ts = &td->ts;
+	unsigned long spent = mtime_since(&ts->stat_sample_time[ddir], t);
 	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);
+	rate = (td->this_io_bytes[ddir] - ts->stat_io_bytes[ddir]) / spent;
+	add_stat_sample(&ts->bw_stat[ddir], rate);
 
-	if (td->bw_log)
-		add_log_sample(td, td->bw_log, rate, ddir);
+	if (ts->bw_log)
+		add_log_sample(td, ts->bw_log, rate, ddir);
 
-	gettimeofday(&td->stat_sample_time[ddir], NULL);
-	td->stat_io_bytes[ddir] = td->this_io_bytes[ddir];
+	fio_gettime(&ts->stat_sample_time[ddir], NULL);
+	ts->stat_io_bytes[ddir] = td->this_io_bytes[ddir];
 }
-
-