X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=stat.c;h=949af5edd49ffa05dfa16bbef70c7d1037de8261;hp=cc1c360e95a522960652e251e4436f3cb4deb66b;hb=6f1a24593c227a4f392f454698aca20e95f0006c;hpb=cdb8308d5d69d7e465473e1f39f5e78d027715da

diff --git a/stat.c b/stat.c
index cc1c360e..949af5ed 100644
--- a/stat.c
+++ b/stat.c
@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include <string.h>
+#include <stdlib.h>
 #include <sys/time.h>
 #include <sys/stat.h>
 #include <math.h>
@@ -17,7 +18,11 @@
 #include "zbd.h"
 #include "oslib/asprintf.h"
 
+#ifdef WIN32
+#define LOG_MSEC_SLACK	2
+#else
 #define LOG_MSEC_SLACK	1
+#endif
 
 struct fio_sem *stat_sem;
 
@@ -211,7 +216,7 @@ static void show_clat_percentiles(uint64_t *io_u_plat, unsigned long long nr,
 
 	len = calc_clat_percentiles(io_u_plat, nr, plist, &ovals, &maxv, &minv);
 	if (!len || !ovals)
-		goto out;
+		return;
 
 	/*
 	 * We default to nsecs, but if the value range is such that we
@@ -258,10 +263,21 @@ static void show_clat_percentiles(uint64_t *io_u_plat, unsigned long long nr,
 			log_buf(out, "\n");
 	}
 
-out:
 	free(ovals);
 }
 
+static int get_nr_prios_with_samples(struct thread_stat *ts, enum fio_ddir ddir)
+{
+	int i, nr_prios_with_samples = 0;
+
+	for (i = 0; i < ts->nr_clat_prio[ddir]; i++) {
+		if (ts->clat_prio[ddir][i].clat_stat.samples)
+			nr_prios_with_samples++;
+	}
+
+	return nr_prios_with_samples;
+}
+
 bool calc_lat(struct io_stat *is, unsigned long long *min,
 	      unsigned long long *max, double *mean, double *dev)
 {
@@ -282,6 +298,47 @@ bool calc_lat(struct io_stat *is, unsigned long long *min,
 	return true;
 }
 
+void show_mixed_group_stats(struct group_run_stats *rs, struct buf_output *out) 
+{
+	char *io, *agg, *min, *max;
+	char *ioalt, *aggalt, *minalt, *maxalt;
+	uint64_t io_mix = 0, agg_mix = 0, min_mix = -1, max_mix = 0;
+	uint64_t min_run = -1, max_run = 0;
+	const int i2p = is_power_of_2(rs->kb_base);
+	int i;
+
+	for (i = 0; i < DDIR_RWDIR_CNT; i++) {
+		if (!rs->max_run[i])
+			continue;
+		io_mix += rs->iobytes[i];
+		agg_mix += rs->agg[i];
+		min_mix = min_mix < rs->min_bw[i] ? min_mix : rs->min_bw[i];
+		max_mix = max_mix > rs->max_bw[i] ? max_mix : rs->max_bw[i];
+		min_run = min_run < rs->min_run[i] ? min_run : rs->min_run[i];
+		max_run = max_run > rs->max_run[i] ? max_run : rs->max_run[i];
+	}
+	io = num2str(io_mix, rs->sig_figs, 1, i2p, N2S_BYTE);
+	ioalt = num2str(io_mix, rs->sig_figs, 1, !i2p, N2S_BYTE);
+	agg = num2str(agg_mix, rs->sig_figs, 1, i2p, rs->unit_base);
+	aggalt = num2str(agg_mix, rs->sig_figs, 1, !i2p, rs->unit_base);
+	min = num2str(min_mix, rs->sig_figs, 1, i2p, rs->unit_base);
+	minalt = num2str(min_mix, rs->sig_figs, 1, !i2p, rs->unit_base);
+	max = num2str(max_mix, rs->sig_figs, 1, i2p, rs->unit_base);
+	maxalt = num2str(max_mix, rs->sig_figs, 1, !i2p, rs->unit_base);
+	log_buf(out, "  MIXED: bw=%s (%s), %s-%s (%s-%s), io=%s (%s), run=%llu-%llumsec\n",
+			agg, aggalt, min, max, minalt, maxalt, io, ioalt,
+			(unsigned long long) min_run,
+			(unsigned long long) max_run);
+	free(io);
+	free(agg);
+	free(min);
+	free(max);
+	free(ioalt);
+	free(aggalt);
+	free(minalt);
+	free(maxalt);
+}
+
 void show_group_stats(struct group_run_stats *rs, struct buf_output *out)
 {
 	char *io, *agg, *min, *max;
@@ -306,7 +363,7 @@ void show_group_stats(struct group_run_stats *rs, struct buf_output *out)
 		max = num2str(rs->max_bw[i], rs->sig_figs, 1, i2p, rs->unit_base);
 		maxalt = num2str(rs->max_bw[i], rs->sig_figs, 1, !i2p, rs->unit_base);
 		log_buf(out, "%s: bw=%s (%s), %s-%s (%s-%s), io=%s (%s), run=%llu-%llumsec\n",
-				rs->unified_rw_rep ? "  MIXED" : str[i],
+				(rs->unified_rw_rep == UNIFIED_MIXED) ? "  MIXED" : str[i],
 				agg, aggalt, min, max, minalt, maxalt, io, ioalt,
 				(unsigned long long) rs->min_run[i],
 				(unsigned long long) rs->max_run[i]);
@@ -320,6 +377,10 @@ void show_group_stats(struct group_run_stats *rs, struct buf_output *out)
 		free(minalt);
 		free(maxalt);
 	}
+
+	/* Need to aggregate statistics to show mixed values */
+	if (rs->unified_rw_rep == UNIFIED_BOTH)
+		show_mixed_group_stats(rs, out);
 }
 
 void stat_calc_dist(uint64_t *map, unsigned long total, double *io_u_dist)
@@ -414,14 +475,57 @@ static void display_lat(const char *name, unsigned long long min,
 	free(maxp);
 }
 
+static struct thread_stat *gen_mixed_ddir_stats_from_ts(struct thread_stat *ts)
+{
+	struct thread_stat *ts_lcl;
+
+	/*
+	 * Handle aggregation of Reads (ddir = 0), Writes (ddir = 1), and
+	 * Trims (ddir = 2)
+	 */
+	ts_lcl = malloc(sizeof(struct thread_stat));
+	if (!ts_lcl) {
+		log_err("fio: failed to allocate local thread stat\n");
+		return NULL;
+	}
+
+	init_thread_stat(ts_lcl);
+
+	/* calculate mixed stats  */
+	ts_lcl->unified_rw_rep = UNIFIED_MIXED;
+	ts_lcl->lat_percentiles = ts->lat_percentiles;
+	ts_lcl->clat_percentiles = ts->clat_percentiles;
+	ts_lcl->slat_percentiles = ts->slat_percentiles;
+	ts_lcl->percentile_precision = ts->percentile_precision;
+	memcpy(ts_lcl->percentile_list, ts->percentile_list, sizeof(ts->percentile_list));
+
+	sum_thread_stats(ts_lcl, ts);
+
+	return ts_lcl;
+}
+
+static double convert_agg_kbytes_percent(struct group_run_stats *rs,
+					 enum fio_ddir ddir, int mean)
+{
+	double p_of_agg = 100.0;
+	if (rs && rs->agg[ddir] > 1024) {
+		p_of_agg = mean * 100.0 / (double) (rs->agg[ddir] / 1024.0);
+
+		if (p_of_agg > 100.0)
+			p_of_agg = 100.0;
+	}
+	return p_of_agg;
+}
+
 static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
-			     int ddir, struct buf_output *out)
+			     enum fio_ddir ddir, struct buf_output *out)
 {
 	unsigned long runt;
 	unsigned long long min, max, bw, iops;
 	double mean, dev;
 	char *io_p, *bw_p, *bw_p_alt, *iops_p, *post_st = NULL;
-	int i2p;
+	int i2p, i;
+	const char *clat_type = ts->lat_percentiles ? "lat" : "clat";
 
 	if (ddir_sync(ddir)) {
 		if (calc_lat(&ts->sync_stat, &min, &max, &mean, &dev)) {
@@ -465,7 +569,7 @@ static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
 	}
 
 	log_buf(out, "  %s: IOPS=%s, BW=%s (%s)(%s/%llumsec)%s\n",
-			rs->unified_rw_rep ? "mixed" : io_ddir_name(ddir),
+			(ts->unified_rw_rep == UNIFIED_MIXED) ? "mixed" : io_ddir_name(ddir),
 			iops_p, bw_p, bw_p_alt, io_p,
 			(unsigned long long) ts->runtime[ddir],
 			post_st ? : "");
@@ -482,45 +586,70 @@ static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
 		display_lat("clat", min, max, mean, dev, out);
 	if (calc_lat(&ts->lat_stat[ddir], &min, &max, &mean, &dev))
 		display_lat(" lat", min, max, mean, dev, out);
-	if (calc_lat(&ts->clat_high_prio_stat[ddir], &min, &max, &mean, &dev))
-		display_lat("prio_clat", min, max, mean, dev, out);
+
+	/* Only print per prio stats if there are >= 2 prios with samples */
+	if (get_nr_prios_with_samples(ts, ddir) >= 2) {
+		for (i = 0; i < ts->nr_clat_prio[ddir]; i++) {
+			if (calc_lat(&ts->clat_prio[ddir][i].clat_stat, &min,
+				     &max, &mean, &dev)) {
+				char buf[64];
+
+				snprintf(buf, sizeof(buf),
+					 "%s prio %u/%u",
+					 clat_type,
+					 ts->clat_prio[ddir][i].ioprio >> 13,
+					 ts->clat_prio[ddir][i].ioprio & 7);
+				display_lat(buf, min, max, mean, dev, out);
+			}
+		}
+	}
+
+	if (ts->slat_percentiles && ts->slat_stat[ddir].samples > 0)
+		show_clat_percentiles(ts->io_u_plat[FIO_SLAT][ddir],
+					ts->slat_stat[ddir].samples,
+					ts->percentile_list,
+					ts->percentile_precision, "slat", out);
+	if (ts->clat_percentiles && ts->clat_stat[ddir].samples > 0)
+		show_clat_percentiles(ts->io_u_plat[FIO_CLAT][ddir],
+					ts->clat_stat[ddir].samples,
+					ts->percentile_list,
+					ts->percentile_precision, "clat", out);
+	if (ts->lat_percentiles && ts->lat_stat[ddir].samples > 0)
+		show_clat_percentiles(ts->io_u_plat[FIO_LAT][ddir],
+					ts->lat_stat[ddir].samples,
+					ts->percentile_list,
+					ts->percentile_precision, "lat", out);
 
 	if (ts->clat_percentiles || ts->lat_percentiles) {
-		const char *name = ts->clat_percentiles ? "clat" : " lat";
-		char prio_name[32];
+		char prio_name[64];
 		uint64_t samples;
 
-		if (ts->clat_percentiles)
-			samples = ts->clat_stat[ddir].samples;
-		else
+		if (ts->lat_percentiles)
 			samples = ts->lat_stat[ddir].samples;
+		else
+			samples = ts->clat_stat[ddir].samples;
 
-		show_clat_percentiles(ts->io_u_plat[ddir],
-					samples,
-					ts->percentile_list,
-					ts->percentile_precision, name, out);
-
-		/* Only print this if some high and low priority stats were collected */
-		if (ts->clat_high_prio_stat[ddir].samples > 0 &&
-			ts->clat_prio_stat[ddir].samples > 0)
-		{
-			sprintf(prio_name, "high prio (%.2f%%) %s",
-					100. * (double) ts->clat_high_prio_stat[ddir].samples / (double) samples,
-					name);
-			show_clat_percentiles(ts->io_u_plat_high_prio[ddir],
-						ts->clat_high_prio_stat[ddir].samples,
-						ts->percentile_list,
-						ts->percentile_precision, prio_name, out);
-
-			sprintf(prio_name, "low prio (%.2f%%) %s",
-					100. * (double) ts->clat_prio_stat[ddir].samples / (double) samples,
-					name);
-			show_clat_percentiles(ts->io_u_plat_prio[ddir],
-						ts->clat_prio_stat[ddir].samples,
-						ts->percentile_list,
-						ts->percentile_precision, prio_name, out);
+		/* Only print per prio stats if there are >= 2 prios with samples */
+		if (get_nr_prios_with_samples(ts, ddir) >= 2) {
+			for (i = 0; i < ts->nr_clat_prio[ddir]; i++) {
+				uint64_t prio_samples = ts->clat_prio[ddir][i].clat_stat.samples;
+
+				if (prio_samples > 0) {
+					snprintf(prio_name, sizeof(prio_name),
+						 "%s prio %u/%u (%.2f%% of IOs)",
+						 clat_type,
+						 ts->clat_prio[ddir][i].ioprio >> 13,
+						 ts->clat_prio[ddir][i].ioprio & 7,
+						 100. * (double) prio_samples / (double) samples);
+					show_clat_percentiles(ts->clat_prio[ddir][i].io_u_plat,
+							      prio_samples, ts->percentile_list,
+							      ts->percentile_precision,
+							      prio_name, out);
+				}
+			}
 		}
 	}
+
 	if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
 		double p_of_agg = 100.0, fkb_base = (double)rs->kb_base;
 		const char *bw_str;
@@ -534,11 +663,7 @@ static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
 		else
 			bw_str = "kB";
 
-		if (rs->agg[ddir]) {
-			p_of_agg = mean * 100 / (double) (rs->agg[ddir] / 1024);
-			if (p_of_agg > 100.0)
-				p_of_agg = 100.0;
-		}
+		p_of_agg = convert_agg_kbytes_percent(rs, ddir, mean);
 
 		if (rs->unit_base == 1) {
 			min *= 8.0;
@@ -567,6 +692,19 @@ static void show_ddir_status(struct group_run_stats *rs, struct thread_stat *ts,
 	}
 }
 
+static void show_mixed_ddir_status(struct group_run_stats *rs,
+				   struct thread_stat *ts,
+				   struct buf_output *out)
+{
+	struct thread_stat *ts_lcl = gen_mixed_ddir_stats_from_ts(ts);
+
+	if (ts_lcl)
+		show_ddir_status(rs, ts_lcl, DDIR_READ, out);
+
+	free_clat_prio_stats(ts_lcl);
+	free(ts_lcl);
+}
+
 static bool show_lat(double *io_u_lat, int nr, const char **ranges,
 		     const char *msg, struct buf_output *out)
 {
@@ -937,7 +1075,7 @@ void json_array_add_disk_util(struct disk_util_stat *dus,
 	obj = json_create_object();
 	json_array_add_value_object(array, obj);
 
-	json_object_add_value_string(obj, "name", dus->name);
+	json_object_add_value_string(obj, "name", (const char *)dus->name);
 	json_object_add_value_int(obj, "read_ios", dus->s.ios[0]);
 	json_object_add_value_int(obj, "write_ios", dus->s.ios[1]);
 	json_object_add_value_int(obj, "read_merges", dus->s.merges[0]);
@@ -997,9 +1135,8 @@ void show_disk_util(int terse, struct json_object *parent,
 	if (!is_running_backend())
 		return;
 
-	if (flist_empty(&disk_list)) {
+	if (flist_empty(&disk_list))
 		return;
-	}
 
 	if ((output_format & FIO_OUTPUT_JSON) && parent)
 		do_json = true;
@@ -1009,9 +1146,9 @@ void show_disk_util(int terse, struct json_object *parent,
 	if (!terse && !do_json)
 		log_buf(out, "\nDisk stats (read/write):\n");
 
-	if (do_json)
+	if (do_json) {
 		json_object_add_disk_utils(parent, &disk_list);
-	else if (output_format & ~(FIO_OUTPUT_JSON | FIO_OUTPUT_JSON_PLUS)) {
+	} else if (output_format & ~(FIO_OUTPUT_JSON | FIO_OUTPUT_JSON_PLUS)) {
 		flist_for_each(entry, &disk_list) {
 			du = flist_entry(entry, struct disk_util, list);
 
@@ -1053,12 +1190,13 @@ static void show_thread_status_normal(struct thread_stat *ts,
 	if (strlen(ts->description))
 		log_buf(out, "  Description  : [%s]\n", ts->description);
 
-	if (ts->io_bytes[DDIR_READ])
-		show_ddir_status(rs, ts, DDIR_READ, out);
-	if (ts->io_bytes[DDIR_WRITE])
-		show_ddir_status(rs, ts, DDIR_WRITE, out);
-	if (ts->io_bytes[DDIR_TRIM])
-		show_ddir_status(rs, ts, DDIR_TRIM, out);
+	for_each_rw_ddir(ddir) {
+		if (ts->io_bytes[ddir])
+			show_ddir_status(rs, ts, ddir, out);
+	}
+
+	if (ts->unified_rw_rep == UNIFIED_BOTH)
+		show_mixed_ddir_status(rs, ts, out);
 
 	show_latencies(ts, out);
 
@@ -1137,8 +1275,9 @@ static void show_thread_status_normal(struct thread_stat *ts,
 }
 
 static void show_ddir_status_terse(struct thread_stat *ts,
-				   struct group_run_stats *rs, int ddir,
-				   int ver, struct buf_output *out)
+				   struct group_run_stats *rs,
+				   enum fio_ddir ddir, int ver,
+				   struct buf_output *out)
 {
 	unsigned long long min, max, minv, maxv, bw, iops;
 	unsigned long long *ovals = NULL;
@@ -1170,13 +1309,19 @@ static void show_ddir_status_terse(struct thread_stat *ts,
 	else
 		log_buf(out, ";%llu;%llu;%f;%f", 0ULL, 0ULL, 0.0, 0.0);
 
-	if (ts->clat_percentiles || ts->lat_percentiles) {
-		len = calc_clat_percentiles(ts->io_u_plat[ddir],
+	if (ts->lat_percentiles) {
+		len = calc_clat_percentiles(ts->io_u_plat[FIO_LAT][ddir],
+					ts->lat_stat[ddir].samples,
+					ts->percentile_list, &ovals, &maxv,
+					&minv);
+	} else if (ts->clat_percentiles) {
+		len = calc_clat_percentiles(ts->io_u_plat[FIO_CLAT][ddir],
 					ts->clat_stat[ddir].samples,
 					ts->percentile_list, &ovals, &maxv,
 					&minv);
-	} else
+	} else {
 		len = 0;
+	}
 
 	for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
 		if (i >= len) {
@@ -1204,8 +1349,9 @@ static void show_ddir_status_terse(struct thread_stat *ts,
 		}
 
 		log_buf(out, ";%llu;%llu;%f%%;%f;%f", min, max, p_of_agg, mean, dev);
-	} else
+	} else {
 		log_buf(out, ";%llu;%llu;%f%%;%f;%f", 0ULL, 0ULL, 0.0, 0.0, 0.0);
+	}
 
 	if (ver == 5) {
 		if (bw_stat)
@@ -1221,28 +1367,89 @@ static void show_ddir_status_terse(struct thread_stat *ts,
 	}
 }
 
+static void show_mixed_ddir_status_terse(struct thread_stat *ts,
+				   struct group_run_stats *rs,
+				   int ver, struct buf_output *out)
+{
+	struct thread_stat *ts_lcl = gen_mixed_ddir_stats_from_ts(ts);
+
+	if (ts_lcl)
+		show_ddir_status_terse(ts_lcl, rs, DDIR_READ, ver, out);
+
+	free_clat_prio_stats(ts_lcl);
+	free(ts_lcl);
+}
+
+static struct json_object *add_ddir_lat_json(struct thread_stat *ts,
+					     uint32_t percentiles,
+					     struct io_stat *lat_stat,
+					     uint64_t *io_u_plat)
+{
+	char buf[120];
+	double mean, dev;
+	unsigned int i, len;
+	struct json_object *lat_object, *percentile_object, *clat_bins_object;
+	unsigned long long min, max, maxv, minv, *ovals = NULL;
+
+	if (!calc_lat(lat_stat, &min, &max, &mean, &dev)) {
+		min = max = 0;
+		mean = dev = 0.0;
+	}
+	lat_object = json_create_object();
+	json_object_add_value_int(lat_object, "min", min);
+	json_object_add_value_int(lat_object, "max", max);
+	json_object_add_value_float(lat_object, "mean", mean);
+	json_object_add_value_float(lat_object, "stddev", dev);
+	json_object_add_value_int(lat_object, "N", lat_stat->samples);
+
+	if (percentiles && lat_stat->samples) {
+		len = calc_clat_percentiles(io_u_plat, lat_stat->samples,
+				ts->percentile_list, &ovals, &maxv, &minv);
+
+		if (len > FIO_IO_U_LIST_MAX_LEN)
+			len = FIO_IO_U_LIST_MAX_LEN;
+
+		percentile_object = json_create_object();
+		json_object_add_value_object(lat_object, "percentile", percentile_object);
+		for (i = 0; i < len; i++) {
+			snprintf(buf, sizeof(buf), "%f", ts->percentile_list[i].u.f);
+			json_object_add_value_int(percentile_object, buf, ovals[i]);
+		}
+		free(ovals);
+
+		if (output_format & FIO_OUTPUT_JSON_PLUS) {
+			clat_bins_object = json_create_object();
+			json_object_add_value_object(lat_object, "bins", clat_bins_object);
+
+			for(i = 0; i < FIO_IO_U_PLAT_NR; i++)
+				if (io_u_plat[i]) {
+					snprintf(buf, sizeof(buf), "%llu", plat_idx_to_val(i));
+					json_object_add_value_int(clat_bins_object, buf, io_u_plat[i]);
+				}
+		}
+	}
+
+	return lat_object;
+}
+
 static void add_ddir_status_json(struct thread_stat *ts,
-		struct group_run_stats *rs, int ddir, struct json_object *parent)
+				 struct group_run_stats *rs, enum fio_ddir ddir,
+				 struct json_object *parent)
 {
-	unsigned long long min, max, minv, maxv;
+	unsigned long long min, max;
 	unsigned long long bw_bytes, bw;
-	unsigned long long *ovals = NULL;
 	double mean, dev, iops;
-	unsigned int len;
-	int i;
-	struct json_object *dir_object, *tmp_object, *percentile_object = NULL,
-		*clat_bins_object = NULL;
-	char buf[120];
+	struct json_object *dir_object, *tmp_object;
 	double p_of_agg = 100.0;
 
 	assert(ddir_rw(ddir) || ddir_sync(ddir));
 
-	if (ts->unified_rw_rep && ddir != DDIR_READ)
+	if ((ts->unified_rw_rep == UNIFIED_MIXED) && ddir != DDIR_READ)
 		return;
 
 	dir_object = json_create_object();
 	json_object_add_value_object(parent,
-		ts->unified_rw_rep ? "mixed" : io_ddir_name(ddir), dir_object);
+		(ts->unified_rw_rep == UNIFIED_MIXED) ? "mixed" : io_ddir_name(ddir), dir_object);
 
 	if (ddir_rw(ddir)) {
 		bw_bytes = 0;
@@ -1266,233 +1473,67 @@ static void add_ddir_status_json(struct thread_stat *ts,
 		json_object_add_value_int(dir_object, "short_ios", ts->short_io_u[ddir]);
 		json_object_add_value_int(dir_object, "drop_ios", ts->drop_io_u[ddir]);
 
-		if (!calc_lat(&ts->slat_stat[ddir], &min, &max, &mean, &dev)) {
-			min = max = 0;
-			mean = dev = 0.0;
-		}
-		tmp_object = json_create_object();
+		tmp_object = add_ddir_lat_json(ts, ts->slat_percentiles,
+				&ts->slat_stat[ddir], ts->io_u_plat[FIO_SLAT][ddir]);
 		json_object_add_value_object(dir_object, "slat_ns", tmp_object);
-		json_object_add_value_int(tmp_object, "min", min);
-		json_object_add_value_int(tmp_object, "max", max);
-		json_object_add_value_float(tmp_object, "mean", mean);
-		json_object_add_value_float(tmp_object, "stddev", dev);
-
-		if (!calc_lat(&ts->clat_stat[ddir], &min, &max, &mean, &dev)) {
-			min = max = 0;
-			mean = dev = 0.0;
-		}
-		tmp_object = json_create_object();
+
+		tmp_object = add_ddir_lat_json(ts, ts->clat_percentiles,
+				&ts->clat_stat[ddir], ts->io_u_plat[FIO_CLAT][ddir]);
 		json_object_add_value_object(dir_object, "clat_ns", tmp_object);
-		json_object_add_value_int(tmp_object, "min", min);
-		json_object_add_value_int(tmp_object, "max", max);
-		json_object_add_value_float(tmp_object, "mean", mean);
-		json_object_add_value_float(tmp_object, "stddev", dev);
-	} else {
-		if (!calc_lat(&ts->sync_stat, &min, &max, &mean, &dev)) {
-			min = max = 0;
-			mean = dev = 0.0;
-		}
 
-		tmp_object = json_create_object();
+		tmp_object = add_ddir_lat_json(ts, ts->lat_percentiles,
+				&ts->lat_stat[ddir], ts->io_u_plat[FIO_LAT][ddir]);
 		json_object_add_value_object(dir_object, "lat_ns", tmp_object);
+	} else {
 		json_object_add_value_int(dir_object, "total_ios", ts->total_io_u[DDIR_SYNC]);
-		json_object_add_value_int(tmp_object, "min", min);
-		json_object_add_value_int(tmp_object, "max", max);
-		json_object_add_value_float(tmp_object, "mean", mean);
-		json_object_add_value_float(tmp_object, "stddev", dev);
-	}
-
-	if (ts->clat_percentiles || ts->lat_percentiles) {
-		if (ddir_rw(ddir)) {
-			uint64_t samples;
-
-			if (ts->clat_percentiles)
-				samples = ts->clat_stat[ddir].samples;
-			else
-				samples = ts->lat_stat[ddir].samples;
-
-			len = calc_clat_percentiles(ts->io_u_plat[ddir],
-					samples, ts->percentile_list, &ovals,
-					&maxv, &minv);
-		} else {
-			len = calc_clat_percentiles(ts->io_u_sync_plat,
-					ts->sync_stat.samples,
-					ts->percentile_list, &ovals, &maxv,
-					&minv);
-		}
-
-		if (len > FIO_IO_U_LIST_MAX_LEN)
-			len = FIO_IO_U_LIST_MAX_LEN;
-	} else
-		len = 0;
-
-	if (ts->clat_percentiles) {
-		percentile_object = json_create_object();
-		json_object_add_value_object(tmp_object, "percentile", percentile_object);
-		for (i = 0; i < len; i++) {
-			snprintf(buf, sizeof(buf), "%f",
-				 ts->percentile_list[i].u.f);
-			json_object_add_value_int(percentile_object, buf,
-						  ovals[i]);
-		}
-	}
-
-	free(ovals);
-
-	if (output_format & FIO_OUTPUT_JSON_PLUS && ts->clat_percentiles) {
-		clat_bins_object = json_create_object();
-		json_object_add_value_object(tmp_object, "bins",
-					     clat_bins_object);
-
-		for(i = 0; i < FIO_IO_U_PLAT_NR; i++) {
-			if (ddir_rw(ddir)) {
-				if (ts->io_u_plat[ddir][i]) {
-					snprintf(buf, sizeof(buf), "%llu", plat_idx_to_val(i));
-					json_object_add_value_int(clat_bins_object, buf, ts->io_u_plat[ddir][i]);
-				}
-			} else {
-				if (ts->io_u_sync_plat[i]) {
-					snprintf(buf, sizeof(buf), "%llu", plat_idx_to_val(i));
-					json_object_add_value_int(clat_bins_object, buf, ts->io_u_sync_plat[i]);
-				}
-			}
-		}
+		tmp_object = add_ddir_lat_json(ts, ts->lat_percentiles | ts->clat_percentiles,
+				&ts->sync_stat, ts->io_u_sync_plat);
+		json_object_add_value_object(dir_object, "lat_ns", tmp_object);
 	}
 
+	if (!ddir_rw(ddir))
+		return;
 
-	/* Only print PRIO latencies if some high priority samples were gathered */
-	if (ts->clat_high_prio_stat[ddir].samples > 0) {
-		/* START OF HIGH PRIO CLAT */
-	    if (!calc_lat(&ts->clat_high_prio_stat[ddir], &min, &max, &mean, &dev)) {
-			min = max = 0;
-			mean = dev = 0.0;
-		}
-		tmp_object = json_create_object();
-		json_object_add_value_object(dir_object, "clat_prio",
-				tmp_object);
-		json_object_add_value_int(tmp_object, "samples",
-				ts->clat_high_prio_stat[ddir].samples);
-		json_object_add_value_int(tmp_object, "min", min);
-		json_object_add_value_int(tmp_object, "max", max);
-		json_object_add_value_float(tmp_object, "mean", mean);
-		json_object_add_value_float(tmp_object, "stddev", dev);
-
-		if (ts->clat_percentiles) {
-			len = calc_clat_percentiles(ts->io_u_plat_high_prio[ddir],
-						ts->clat_high_prio_stat[ddir].samples,
-						ts->percentile_list, &ovals, &maxv,
-						&minv);
-		} else
-			len = 0;
-
-		percentile_object = json_create_object();
-		json_object_add_value_object(tmp_object, "percentile", percentile_object);
-		for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
-			if (i >= len) {
-				json_object_add_value_int(percentile_object, "0.00", 0);
-				continue;
-			}
-			snprintf(buf, sizeof(buf), "%f", ts->percentile_list[i].u.f);
-			json_object_add_value_int(percentile_object, (const char *)buf, ovals[i]);
-		}
-
-		if (output_format & FIO_OUTPUT_JSON_PLUS) {
-			clat_bins_object = json_create_object();
-			json_object_add_value_object(tmp_object, "bins", clat_bins_object);
-			for(i = 0; i < FIO_IO_U_PLAT_NR; i++) {
-				snprintf(buf, sizeof(buf), "%d", i);
-				json_object_add_value_int(clat_bins_object, (const char *)buf,
-						ts->io_u_plat_high_prio[ddir][i]);
-			}
-			json_object_add_value_int(clat_bins_object, "FIO_IO_U_PLAT_BITS",
-					FIO_IO_U_PLAT_BITS);
-			json_object_add_value_int(clat_bins_object, "FIO_IO_U_PLAT_VAL",
-					FIO_IO_U_PLAT_VAL);
-			json_object_add_value_int(clat_bins_object, "FIO_IO_U_PLAT_NR",
-					FIO_IO_U_PLAT_NR);
-		}
-		/* END OF HIGH PRIO CLAT */
-
-		/* START OF PRIO CLAT */
-	    if (!calc_lat(&ts->clat_prio_stat[ddir], &min, &max, &mean, &dev)) {
-			min = max = 0;
-			mean = dev = 0.0;
-		}
-		tmp_object = json_create_object();
-		json_object_add_value_object(dir_object, "clat_low_prio",
-				tmp_object);
-		json_object_add_value_int(tmp_object, "samples",
-				ts->clat_prio_stat[ddir].samples);
-		json_object_add_value_int(tmp_object, "min", min);
-		json_object_add_value_int(tmp_object, "max", max);
-		json_object_add_value_float(tmp_object, "mean", mean);
-		json_object_add_value_float(tmp_object, "stddev", dev);
-
-		if (ts->clat_percentiles) {
-			len = calc_clat_percentiles(ts->io_u_plat_prio[ddir],
-						ts->clat_prio_stat[ddir].samples,
-						ts->percentile_list, &ovals, &maxv,
-						&minv);
-		} else
-			len = 0;
-
-		percentile_object = json_create_object();
-		json_object_add_value_object(tmp_object, "percentile", percentile_object);
-		for (i = 0; i < FIO_IO_U_LIST_MAX_LEN; i++) {
-			if (i >= len) {
-				json_object_add_value_int(percentile_object, "0.00", 0);
-				continue;
-			}
-			snprintf(buf, sizeof(buf), "%f", ts->percentile_list[i].u.f);
-			json_object_add_value_int(percentile_object, (const char *)buf, ovals[i]);
-		}
+	/* Only include per prio stats if there are >= 2 prios with samples */
+	if (get_nr_prios_with_samples(ts, ddir) >= 2) {
+		struct json_array *array = json_create_array();
+		const char *obj_name;
+		int i;
 
-		if (output_format & FIO_OUTPUT_JSON_PLUS) {
-			clat_bins_object = json_create_object();
-			json_object_add_value_object(tmp_object, "bins", clat_bins_object);
-			for(i = 0; i < FIO_IO_U_PLAT_NR; i++) {
-				snprintf(buf, sizeof(buf), "%d", i);
-				json_object_add_value_int(clat_bins_object, (const char *)buf,
-						ts->io_u_plat_prio[ddir][i]);
+		if (ts->lat_percentiles)
+			obj_name = "lat_ns";
+		else
+			obj_name = "clat_ns";
+
+		json_object_add_value_array(dir_object, "prios", array);
+
+		for (i = 0; i < ts->nr_clat_prio[ddir]; i++) {
+			if (ts->clat_prio[ddir][i].clat_stat.samples > 0) {
+				struct json_object *obj = json_create_object();
+				unsigned long long class, level;
+
+				class = ts->clat_prio[ddir][i].ioprio >> 13;
+				json_object_add_value_int(obj, "prioclass", class);
+				level = ts->clat_prio[ddir][i].ioprio & 7;
+				json_object_add_value_int(obj, "prio", level);
+
+				tmp_object = add_ddir_lat_json(ts,
+							       ts->clat_percentiles | ts->lat_percentiles,
+							       &ts->clat_prio[ddir][i].clat_stat,
+							       ts->clat_prio[ddir][i].io_u_plat);
+				json_object_add_value_object(obj, obj_name, tmp_object);
+				json_array_add_value_object(array, obj);
 			}
-			json_object_add_value_int(clat_bins_object, "FIO_IO_U_PLAT_BITS",
-					FIO_IO_U_PLAT_BITS);
-			json_object_add_value_int(clat_bins_object, "FIO_IO_U_PLAT_VAL",
-					FIO_IO_U_PLAT_VAL);
-			json_object_add_value_int(clat_bins_object, "FIO_IO_U_PLAT_NR",
-					FIO_IO_U_PLAT_NR);
 		}
-		/* END OF PRIO CLAT */
 	}
 
-	if (!ddir_rw(ddir))
-		return;
-
-	if (!calc_lat(&ts->lat_stat[ddir], &min, &max, &mean, &dev)) {
-		min = max = 0;
-		mean = dev = 0.0;
-	}
-	tmp_object = json_create_object();
-	json_object_add_value_object(dir_object, "lat_ns", tmp_object);
-	json_object_add_value_int(tmp_object, "min", min);
-	json_object_add_value_int(tmp_object, "max", max);
-	json_object_add_value_float(tmp_object, "mean", mean);
-	json_object_add_value_float(tmp_object, "stddev", dev);
-	if (ts->lat_percentiles)
-		json_object_add_value_object(tmp_object, "percentile", percentile_object);
-	if (output_format & FIO_OUTPUT_JSON_PLUS && ts->lat_percentiles)
-		json_object_add_value_object(tmp_object, "bins", clat_bins_object);
-
 	if (calc_lat(&ts->bw_stat[ddir], &min, &max, &mean, &dev)) {
-		if (rs->agg[ddir]) {
-			p_of_agg = mean * 100 / (double) (rs->agg[ddir] / 1024);
-			if (p_of_agg > 100.0)
-				p_of_agg = 100.0;
-		}
+		p_of_agg = convert_agg_kbytes_percent(rs, ddir, mean);
 	} else {
 		min = max = 0;
 		p_of_agg = mean = dev = 0.0;
 	}
+
 	json_object_add_value_int(dir_object, "bw_min", min);
 	json_object_add_value_int(dir_object, "bw_max", max);
 	json_object_add_value_float(dir_object, "bw_agg", p_of_agg);
@@ -1523,6 +1564,19 @@ static void add_ddir_status_json(struct thread_stat *ts,
 	}
 }
 
+static void add_mixed_ddir_status_json(struct thread_stat *ts,
+		struct group_run_stats *rs, struct json_object *parent)
+{
+	struct thread_stat *ts_lcl = gen_mixed_ddir_stats_from_ts(ts);
+
+	/* add the aggregated stats to json parent */
+	if (ts_lcl)
+		add_ddir_status_json(ts_lcl, rs, DDIR_READ, parent);
+
+	free_clat_prio_stats(ts_lcl);
+	free(ts_lcl);
+}
+
 static void show_thread_status_terse_all(struct thread_stat *ts,
 					 struct group_run_stats *rs, int ver,
 					 struct buf_output *out)
@@ -1540,14 +1594,17 @@ static void show_thread_status_terse_all(struct thread_stat *ts,
 		log_buf(out, "%d;%s;%s;%d;%d", ver, fio_version_string,
 			ts->name, ts->groupid, ts->error);
 
-	/* Log Read Status */
+	/* Log Read Status, or mixed if unified_rw_rep = 1 */
 	show_ddir_status_terse(ts, rs, DDIR_READ, ver, out);
-	/* Log Write Status */
-	show_ddir_status_terse(ts, rs, DDIR_WRITE, ver, out);
-	/* Log Trim Status */
-	if (ver == 2 || ver == 4 || ver == 5)
-		show_ddir_status_terse(ts, rs, DDIR_TRIM, ver, out);
-
+	if (ts->unified_rw_rep != UNIFIED_MIXED) {
+		/* Log Write Status */
+		show_ddir_status_terse(ts, rs, DDIR_WRITE, ver, out);
+		/* Log Trim Status */
+		if (ver == 2 || ver == 4 || ver == 5)
+			show_ddir_status_terse(ts, rs, DDIR_TRIM, ver, out);
+	}
+	if (ts->unified_rw_rep == UNIFIED_BOTH)
+		show_mixed_ddir_status_terse(ts, rs, ver, out);
 	/* CPU Usage */
 	if (ts->total_run_time) {
 		double runt = (double) ts->total_run_time;
@@ -1613,12 +1670,8 @@ static void json_add_job_opts(struct json_object *root, const char *name,
 	json_object_add_value_object(root, name, dir_object);
 
 	flist_for_each(entry, opt_list) {
-		const char *pos = "";
-
 		p = flist_entry(entry, struct print_option, list);
-		if (p->value)
-			pos = p->value;
-		json_object_add_value_string(dir_object, p->name, pos);
+		json_object_add_value_string(dir_object, p->name, p->value);
 	}
 }
 
@@ -1646,6 +1699,7 @@ static struct json_object *show_thread_status_json(struct thread_stat *ts,
 	if (je) {
 		json_object_add_value_int(root, "eta", je->eta_sec);
 		json_object_add_value_int(root, "elapsed", je->elapsed_sec);
+		free(je);
 	}
 
 	if (opt_list)
@@ -1656,6 +1710,9 @@ static struct json_object *show_thread_status_json(struct thread_stat *ts,
 	add_ddir_status_json(ts, rs, DDIR_TRIM, root);
 	add_ddir_status_json(ts, rs, DDIR_SYNC, root);
 
+	if (ts->unified_rw_rep == UNIFIED_BOTH)
+		add_mixed_ddir_status_json(ts, rs, root);
+
 	/* CPU Usage */
 	if (ts->total_run_time) {
 		double runt = (double) ts->total_run_time;
@@ -1926,9 +1983,10 @@ static void __sum_stat(struct io_stat *dst, struct io_stat *src, bool first)
  * numbers. For group_reporting, we should just add those up, not make
  * them the mean of everything.
  */
-static void sum_stat(struct io_stat *dst, struct io_stat *src, bool first,
-		     bool pure_sum)
+static void sum_stat(struct io_stat *dst, struct io_stat *src, bool pure_sum)
 {
+	bool first = dst->samples == 0;
+
 	if (src->samples == 0)
 		return;
 
@@ -1978,48 +2036,251 @@ void sum_group_stats(struct group_run_stats *dst, struct group_run_stats *src)
 		dst->sig_figs = src->sig_figs;
 }
 
-void sum_thread_stats(struct thread_stat *dst, struct thread_stat *src,
-		      bool first)
+/*
+ * Free the clat_prio_stat arrays allocated by alloc_clat_prio_stat_ddir().
+ */
+void free_clat_prio_stats(struct thread_stat *ts)
+{
+	enum fio_ddir ddir;
+
+	if (!ts)
+		return;
+
+	for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
+		sfree(ts->clat_prio[ddir]);
+		ts->clat_prio[ddir] = NULL;
+		ts->nr_clat_prio[ddir] = 0;
+	}
+}
+
+/*
+ * Allocate a clat_prio_stat array. The array has to be allocated/freed using
+ * smalloc/sfree, so that it is accessible by the process/thread summing the
+ * thread_stats.
+ */
+int alloc_clat_prio_stat_ddir(struct thread_stat *ts, enum fio_ddir ddir,
+			      int nr_prios)
+{
+	struct clat_prio_stat *clat_prio;
+	int i;
+
+	clat_prio = scalloc(nr_prios, sizeof(*ts->clat_prio[ddir]));
+	if (!clat_prio) {
+		log_err("fio: failed to allocate ts clat data\n");
+		return 1;
+	}
+
+	for (i = 0; i < nr_prios; i++)
+		clat_prio[i].clat_stat.min_val = ULONG_MAX;
+
+	ts->clat_prio[ddir] = clat_prio;
+	ts->nr_clat_prio[ddir] = nr_prios;
+
+	return 0;
+}
+
+static int grow_clat_prio_stat(struct thread_stat *dst, enum fio_ddir ddir)
+{
+	int curr_len = dst->nr_clat_prio[ddir];
+	void *new_arr;
+
+	new_arr = scalloc(curr_len + 1, sizeof(*dst->clat_prio[ddir]));
+	if (!new_arr) {
+		log_err("fio: failed to grow clat prio array\n");
+		return 1;
+	}
+
+	memcpy(new_arr, dst->clat_prio[ddir],
+	       curr_len * sizeof(*dst->clat_prio[ddir]));
+	sfree(dst->clat_prio[ddir]);
+
+	dst->clat_prio[ddir] = new_arr;
+	dst->clat_prio[ddir][curr_len].clat_stat.min_val = ULONG_MAX;
+	dst->nr_clat_prio[ddir]++;
+
+	return 0;
+}
+
+static int find_clat_prio_index(struct thread_stat *dst, enum fio_ddir ddir,
+				uint32_t ioprio)
+{
+	int i, nr_prios = dst->nr_clat_prio[ddir];
+
+	for (i = 0; i < nr_prios; i++) {
+		if (dst->clat_prio[ddir][i].ioprio == ioprio)
+			return i;
+	}
+
+	return -1;
+}
+
+static int alloc_or_get_clat_prio_index(struct thread_stat *dst,
+					enum fio_ddir ddir, uint32_t ioprio,
+					int *idx)
 {
-	int l, k;
+	int index = find_clat_prio_index(dst, ddir, ioprio);
+
+	if (index == -1) {
+		index = dst->nr_clat_prio[ddir];
+
+		if (grow_clat_prio_stat(dst, ddir))
+			return 1;
+
+		dst->clat_prio[ddir][index].ioprio = ioprio;
+	}
+
+	*idx = index;
+
+	return 0;
+}
+
+static int clat_prio_stats_copy(struct thread_stat *dst, struct thread_stat *src,
+				enum fio_ddir dst_ddir, enum fio_ddir src_ddir)
+{
+	size_t sz = sizeof(*src->clat_prio[src_ddir]) *
+		src->nr_clat_prio[src_ddir];
+
+	dst->clat_prio[dst_ddir] = smalloc(sz);
+	if (!dst->clat_prio[dst_ddir]) {
+		log_err("fio: failed to alloc clat prio array\n");
+		return 1;
+	}
+
+	memcpy(dst->clat_prio[dst_ddir], src->clat_prio[src_ddir], sz);
+	dst->nr_clat_prio[dst_ddir] = src->nr_clat_prio[src_ddir];
+
+	return 0;
+}
+
+static int clat_prio_stat_add_samples(struct thread_stat *dst,
+				      enum fio_ddir dst_ddir, uint32_t ioprio,
+				      struct io_stat *io_stat,
+				      uint64_t *io_u_plat)
+{
+	int i, dst_index;
+
+	if (!io_stat->samples)
+		return 0;
+
+	if (alloc_or_get_clat_prio_index(dst, dst_ddir, ioprio, &dst_index))
+		return 1;
+
+	sum_stat(&dst->clat_prio[dst_ddir][dst_index].clat_stat, io_stat,
+		 false);
+
+	for (i = 0; i < FIO_IO_U_PLAT_NR; i++)
+		dst->clat_prio[dst_ddir][dst_index].io_u_plat[i] += io_u_plat[i];
+
+	return 0;
+}
+
+static int sum_clat_prio_stats_src_single_prio(struct thread_stat *dst,
+					       struct thread_stat *src,
+					       enum fio_ddir dst_ddir,
+					       enum fio_ddir src_ddir)
+{
+	struct io_stat *io_stat;
+	uint64_t *io_u_plat;
+
+	/*
+	 * If src ts has no clat_prio_stat array, then all I/Os were submitted
+	 * using src->ioprio. Thus, the global samples in src->clat_stat (or
+	 * src->lat_stat) can be used as the 'per prio' samples for src->ioprio.
+	 */
+	assert(!src->clat_prio[src_ddir]);
+	assert(src->nr_clat_prio[src_ddir] == 0);
+
+	if (src->lat_percentiles) {
+		io_u_plat = src->io_u_plat[FIO_LAT][src_ddir];
+		io_stat = &src->lat_stat[src_ddir];
+	} else {
+		io_u_plat = src->io_u_plat[FIO_CLAT][src_ddir];
+		io_stat = &src->clat_stat[src_ddir];
+	}
+
+	return clat_prio_stat_add_samples(dst, dst_ddir, src->ioprio, io_stat,
+					  io_u_plat);
+}
+
+static int sum_clat_prio_stats_src_multi_prio(struct thread_stat *dst,
+					      struct thread_stat *src,
+					      enum fio_ddir dst_ddir,
+					      enum fio_ddir src_ddir)
+{
+	int i;
+
+	/*
+	 * If src ts has a clat_prio_stat array, then there are multiple prios
+	 * in use (i.e. src ts had cmdprio_percentage or cmdprio_bssplit set).
+	 * The samples for the default prio will exist in the src->clat_prio
+	 * array, just like the samples for any other prio.
+	 */
+	assert(src->clat_prio[src_ddir]);
+	assert(src->nr_clat_prio[src_ddir]);
+
+	/* If the dst ts doesn't yet have a clat_prio array, simply memcpy. */
+	if (!dst->clat_prio[dst_ddir])
+		return clat_prio_stats_copy(dst, src, dst_ddir, src_ddir);
+
+	/* The dst ts already has a clat_prio_array, add src stats into it. */
+	for (i = 0; i < src->nr_clat_prio[src_ddir]; i++) {
+		struct io_stat *io_stat = &src->clat_prio[src_ddir][i].clat_stat;
+		uint64_t *io_u_plat = src->clat_prio[src_ddir][i].io_u_plat;
+		uint32_t ioprio = src->clat_prio[src_ddir][i].ioprio;
+
+		if (clat_prio_stat_add_samples(dst, dst_ddir, ioprio, io_stat, io_u_plat))
+			return 1;
+	}
+
+	return 0;
+}
+
+static int sum_clat_prio_stats(struct thread_stat *dst, struct thread_stat *src,
+			       enum fio_ddir dst_ddir, enum fio_ddir src_ddir)
+{
+	if (dst->disable_prio_stat)
+		return 0;
+
+	if (!src->clat_prio[src_ddir])
+		return sum_clat_prio_stats_src_single_prio(dst, src, dst_ddir,
+							   src_ddir);
+
+	return sum_clat_prio_stats_src_multi_prio(dst, src, dst_ddir, src_ddir);
+}
+
+void sum_thread_stats(struct thread_stat *dst, struct thread_stat *src)
+{
+	int k, l, m;
 
 	for (l = 0; l < DDIR_RWDIR_CNT; l++) {
-		if (!dst->unified_rw_rep) {
-			sum_stat(&dst->clat_stat[l], &src->clat_stat[l], first, false);
-			sum_stat(&dst->clat_high_prio_stat[l], &src->clat_high_prio_stat[l], first, false);
-			sum_stat(&dst->clat_prio_stat[l], &src->clat_prio_stat[l], first, false);
-			sum_stat(&dst->slat_stat[l], &src->slat_stat[l], first, false);
-			sum_stat(&dst->lat_stat[l], &src->lat_stat[l], first, false);
-			sum_stat(&dst->bw_stat[l], &src->bw_stat[l], first, true);
-			sum_stat(&dst->iops_stat[l], &src->iops_stat[l], first, true);
+		if (dst->unified_rw_rep != UNIFIED_MIXED) {
+			sum_stat(&dst->clat_stat[l], &src->clat_stat[l], false);
+			sum_stat(&dst->slat_stat[l], &src->slat_stat[l], false);
+			sum_stat(&dst->lat_stat[l], &src->lat_stat[l], false);
+			sum_stat(&dst->bw_stat[l], &src->bw_stat[l], true);
+			sum_stat(&dst->iops_stat[l], &src->iops_stat[l], true);
+			sum_clat_prio_stats(dst, src, l, l);
 
 			dst->io_bytes[l] += src->io_bytes[l];
 
 			if (dst->runtime[l] < src->runtime[l])
 				dst->runtime[l] = src->runtime[l];
 		} else {
-			sum_stat(&dst->clat_stat[0], &src->clat_stat[l], first, false);
-			sum_stat(&dst->clat_high_prio_stat[l], &src->clat_high_prio_stat[l], first, false);
-			sum_stat(&dst->clat_prio_stat[l], &src->clat_prio_stat[l], first, false);
-			sum_stat(&dst->slat_stat[0], &src->slat_stat[l], first, false);
-			sum_stat(&dst->lat_stat[0], &src->lat_stat[l], first, false);
-			sum_stat(&dst->bw_stat[0], &src->bw_stat[l], first, true);
-			sum_stat(&dst->iops_stat[0], &src->iops_stat[l], first, true);
+			sum_stat(&dst->clat_stat[0], &src->clat_stat[l], false);
+			sum_stat(&dst->slat_stat[0], &src->slat_stat[l], false);
+			sum_stat(&dst->lat_stat[0], &src->lat_stat[l], false);
+			sum_stat(&dst->bw_stat[0], &src->bw_stat[l], true);
+			sum_stat(&dst->iops_stat[0], &src->iops_stat[l], true);
+			sum_clat_prio_stats(dst, src, 0, l);
 
 			dst->io_bytes[0] += src->io_bytes[l];
 
 			if (dst->runtime[0] < src->runtime[l])
 				dst->runtime[0] = src->runtime[l];
-
-			/*
-			 * We're summing to the same destination, so override
-			 * 'first' after the first iteration of the loop
-			 */
-			first = false;
 		}
 	}
 
-	sum_stat(&dst->sync_stat, &src->sync_stat, first, false);
+	sum_stat(&dst->sync_stat, &src->sync_stat, false);
 	dst->usr_time += src->usr_time;
 	dst->sys_time += src->sys_time;
 	dst->ctx += src->ctx;
@@ -2039,11 +2300,8 @@ void sum_thread_stats(struct thread_stat *dst, struct thread_stat *src,
 	for (k = 0; k < FIO_IO_U_LAT_M_NR; k++)
 		dst->io_u_lat_m[k] += src->io_u_lat_m[k];
 
-	for (k = 0; k < FIO_IO_U_PLAT_NR; k++)
-		dst->io_u_sync_plat[k] += src->io_u_sync_plat[k];
-
 	for (k = 0; k < DDIR_RWDIR_CNT; k++) {
-		if (!dst->unified_rw_rep) {
+		if (dst->unified_rw_rep != UNIFIED_MIXED) {
 			dst->total_io_u[k] += src->total_io_u[k];
 			dst->short_io_u[k] += src->short_io_u[k];
 			dst->drop_io_u[k] += src->drop_io_u[k];
@@ -2056,22 +2314,16 @@ void sum_thread_stats(struct thread_stat *dst, struct thread_stat *src,
 
 	dst->total_io_u[DDIR_SYNC] += src->total_io_u[DDIR_SYNC];
 
-	for (k = 0; k < DDIR_RWDIR_CNT; k++) {
-		int m;
-
-		for (m = 0; m < FIO_IO_U_PLAT_NR; m++) {
-			if (!dst->unified_rw_rep) {
-				dst->io_u_plat[k][m] += src->io_u_plat[k][m];
-				dst->io_u_plat_high_prio[k][m] += src->io_u_plat_high_prio[k][m];
-				dst->io_u_plat_prio[k][m] += src->io_u_plat_prio[k][m];
-			} else {
-				dst->io_u_plat[0][m] += src->io_u_plat[k][m];
-				dst->io_u_plat_high_prio[0][m] += src->io_u_plat_high_prio[k][m];
-				dst->io_u_plat_prio[0][m] += src->io_u_plat_prio[k][m];
-			}
+	for (k = 0; k < FIO_LAT_CNT; k++)
+		for (l = 0; l < DDIR_RWDIR_CNT; l++)
+			for (m = 0; m < FIO_IO_U_PLAT_NR; m++)
+				if (dst->unified_rw_rep != UNIFIED_MIXED)
+					dst->io_u_plat[k][l][m] += src->io_u_plat[k][l][m];
+				else
+					dst->io_u_plat[k][0][m] += src->io_u_plat[k][l][m];
 
-		}
-	}
+	for (k = 0; k < FIO_IO_U_PLAT_NR; k++)
+		dst->io_u_sync_plat[k] += src->io_u_sync_plat[k];
 
 	dst->total_run_time += src->total_run_time;
 	dst->total_submit += src->total_submit;
@@ -2090,25 +2342,80 @@ void init_group_run_stat(struct group_run_stats *gs)
 		gs->min_bw[i] = gs->min_run[i] = ~0UL;
 }
 
-void init_thread_stat(struct thread_stat *ts)
+void init_thread_stat_min_vals(struct thread_stat *ts)
 {
-	int j;
+	int i;
 
+	for (i = 0; i < DDIR_RWDIR_CNT; i++) {
+		ts->clat_stat[i].min_val = ULONG_MAX;
+		ts->slat_stat[i].min_val = ULONG_MAX;
+		ts->lat_stat[i].min_val = ULONG_MAX;
+		ts->bw_stat[i].min_val = ULONG_MAX;
+		ts->iops_stat[i].min_val = ULONG_MAX;
+	}
+	ts->sync_stat.min_val = ULONG_MAX;
+}
+
+void init_thread_stat(struct thread_stat *ts)
+{
 	memset(ts, 0, sizeof(*ts));
 
-	for (j = 0; j < DDIR_RWDIR_CNT; j++) {
-		ts->lat_stat[j].min_val = -1UL;
-		ts->clat_stat[j].min_val = -1UL;
-		ts->slat_stat[j].min_val = -1UL;
-		ts->bw_stat[j].min_val = -1UL;
-		ts->iops_stat[j].min_val = -1UL;
-		ts->clat_high_prio_stat[j].min_val = -1UL;
-		ts->clat_prio_stat[j].min_val = -1UL;
-	}
-	ts->sync_stat.min_val = -1UL;
+	init_thread_stat_min_vals(ts);
 	ts->groupid = -1;
 }
 
+static void init_per_prio_stats(struct thread_stat *threadstats, int nr_ts)
+{
+	struct thread_data *td;
+	struct thread_stat *ts;
+	int i, j, last_ts, idx;
+	enum fio_ddir ddir;
+
+	j = 0;
+	last_ts = -1;
+	idx = 0;
+
+	/*
+	 * Loop through all tds, if a td requires per prio stats, temporarily
+	 * store a 1 in ts->disable_prio_stat, and then do an additional
+	 * loop at the end where we invert the ts->disable_prio_stat values.
+	 */
+	for_each_td(td, i) {
+		if (!td->o.stats)
+			continue;
+		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 == 0 means first td in group, or td is not in a group. */
+		if (idx == 0)
+			ts->ioprio = td->ioprio;
+		else if (td->ioprio != ts->ioprio)
+			ts->disable_prio_stat = 1;
+
+		for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
+			if (td->ts.clat_prio[ddir]) {
+				ts->disable_prio_stat = 1;
+				break;
+			}
+		}
+
+		idx++;
+	}
+
+	/* Loop through all dst threadstats and fixup the values. */
+	for (i = 0; i < nr_ts; i++) {
+		ts = &threadstats[i];
+		ts->disable_prio_stat = !ts->disable_prio_stat;
+	}
+}
+
 void __show_run_stats(void)
 {
 	struct group_run_stats *runstats, *rs;
@@ -2155,6 +2462,8 @@ void __show_run_stats(void)
 		opt_lists[i] = NULL;
 	}
 
+	init_per_prio_stats(threadstats, nr_ts);
+
 	j = 0;
 	last_ts = -1;
 	idx = 0;
@@ -2173,12 +2482,12 @@ void __show_run_stats(void)
 
 		ts->clat_percentiles = td->o.clat_percentiles;
 		ts->lat_percentiles = td->o.lat_percentiles;
+		ts->slat_percentiles = td->o.slat_percentiles;
 		ts->percentile_precision = td->o.percentile_precision;
 		memcpy(ts->percentile_list, td->o.percentile_list, sizeof(td->o.percentile_list));
 		opt_lists[j] = &td->opt_list;
 
 		idx++;
-		ts->members++;
 
 		if (ts->groupid == -1) {
 			/*
@@ -2243,7 +2552,9 @@ void __show_run_stats(void)
 		for (k = 0; k < ts->nr_block_infos; k++)
 			ts->block_infos[k] = td->ts.block_infos[k];
 
-		sum_thread_stats(ts, &td->ts, idx == 1);
+		sum_thread_stats(ts, &td->ts);
+
+		ts->members++;
 
 		if (td->o.ss_dur) {
 			ts->ss_state = td->ss.state;
@@ -2270,7 +2581,7 @@ void __show_run_stats(void)
 		rs->kb_base = ts->kb_base;
 		rs->unit_base = ts->unit_base;
 		rs->sig_figs = ts->sig_figs;
-		rs->unified_rw_rep += ts->unified_rw_rep;
+		rs->unified_rw_rep |= ts->unified_rw_rep;
 
 		for (j = 0; j < DDIR_RWDIR_CNT; j++) {
 			if (!ts->runtime[j])
@@ -2293,7 +2604,7 @@ void __show_run_stats(void)
 	}
 
 	for (i = 0; i < groupid + 1; i++) {
-		int ddir;
+		enum fio_ddir ddir;
 
 		rs = &runstats[i];
 
@@ -2399,11 +2710,17 @@ void __show_run_stats(void)
 
 	log_info_flush();
 	free(runstats);
+
+	/* free arrays allocated by sum_thread_stats(), if any */
+	for (i = 0; i < nr_ts; i++) {
+		ts = &threadstats[i];
+		free_clat_prio_stats(ts);
+	}
 	free(threadstats);
 	free(opt_lists);
 }
 
-void __show_running_run_stats(void)
+int __show_running_run_stats(void)
 {
 	struct thread_data *td;
 	unsigned long long *rt;
@@ -2416,10 +2733,13 @@ void __show_running_run_stats(void)
 	fio_gettime(&ts, NULL);
 
 	for_each_td(td, i) {
+		if (td->runstate >= TD_EXITED)
+			continue;
+
 		td->update_rusage = 1;
-		td->ts.io_bytes[DDIR_READ] = td->io_bytes[DDIR_READ];
-		td->ts.io_bytes[DDIR_WRITE] = td->io_bytes[DDIR_WRITE];
-		td->ts.io_bytes[DDIR_TRIM] = td->io_bytes[DDIR_TRIM];
+		for_each_rw_ddir(ddir) {
+			td->ts.io_bytes[ddir] = td->io_bytes[ddir];
+		}
 		td->ts.total_run_time = mtime_since(&td->epoch, &ts);
 
 		rt[i] = mtime_since(&td->start, &ts);
@@ -2444,6 +2764,9 @@ void __show_running_run_stats(void)
 	__show_run_stats();
 
 	for_each_td(td, i) {
+		if (td->runstate >= TD_EXITED)
+			continue;
+
 		if (td_read(td) && td->ts.io_bytes[DDIR_READ])
 			td->ts.runtime[DDIR_READ] -= rt[i];
 		if (td_write(td) && td->ts.io_bytes[DDIR_WRITE])
@@ -2454,10 +2777,10 @@ void __show_running_run_stats(void)
 
 	free(rt);
 	fio_sem_up(stat_sem);
+
+	return 0;
 }
 
-static bool status_interval_init;
-static struct timespec status_time;
 static bool status_file_disabled;
 
 #define FIO_STATUS_FILE		"fio-dump-status"
@@ -2500,16 +2823,6 @@ static int check_status_file(void)
 
 void check_for_running_stats(void)
 {
-	if (status_interval) {
-		if (!status_interval_init) {
-			fio_gettime(&status_time, NULL);
-			status_interval_init = true;
-		} else if (mtime_since_now(&status_time) >= status_interval) {
-			show_running_run_stats();
-			fio_gettime(&status_time, NULL);
-			return;
-		}
-	}
 	if (check_status_file()) {
 		show_running_run_stats();
 		return;
@@ -2535,33 +2848,39 @@ static inline void add_stat_sample(struct io_stat *is, unsigned long long data)
 	is->samples++;
 }
 
+static inline void add_stat_prio_sample(struct clat_prio_stat *clat_prio,
+					unsigned short clat_prio_index,
+					unsigned long long nsec)
+{
+	if (clat_prio)
+		add_stat_sample(&clat_prio[clat_prio_index].clat_stat, nsec);
+}
+
 /*
  * Return a struct io_logs, which is added to the tail of the log
  * list for 'iolog'.
  */
 static struct io_logs *get_new_log(struct io_log *iolog)
 {
-	size_t new_size, new_samples;
+	size_t new_samples;
 	struct io_logs *cur_log;
 
 	/*
 	 * Cap the size at MAX_LOG_ENTRIES, so we don't keep doubling
 	 * forever
 	 */
-	if (!iolog->cur_log_max)
-		new_samples = DEF_LOG_ENTRIES;
-	else {
+	if (!iolog->cur_log_max) {
+		new_samples = iolog->td->o.log_entries;
+	} else {
 		new_samples = iolog->cur_log_max * 2;
 		if (new_samples > MAX_LOG_ENTRIES)
 			new_samples = MAX_LOG_ENTRIES;
 	}
 
-	new_size = new_samples * log_entry_sz(iolog);
-
 	cur_log = smalloc(sizeof(*cur_log));
 	if (cur_log) {
 		INIT_FLIST_HEAD(&cur_log->list);
-		cur_log->log = malloc(new_size);
+		cur_log->log = calloc(new_samples, log_entry_sz(iolog));
 		if (cur_log->log) {
 			cur_log->nr_samples = 0;
 			cur_log->max_samples = new_samples;
@@ -2650,6 +2969,14 @@ void regrow_logs(struct thread_data *td)
 	td->flags &= ~TD_F_REGROW_LOGS;
 }
 
+void regrow_agg_logs(void)
+{
+	enum fio_ddir ddir;
+
+	for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++)
+		regrow_log(agg_io_log[ddir]);
+}
+
 static struct io_logs *get_cur_log(struct io_log *iolog)
 {
 	struct io_logs *cur_log;
@@ -2684,7 +3011,8 @@ static struct io_logs *get_cur_log(struct io_log *iolog)
 
 static void __add_log_sample(struct io_log *iolog, union io_sample_data data,
 			     enum fio_ddir ddir, unsigned long long bs,
-			     unsigned long t, uint64_t offset, uint8_t priority_bit)
+			     unsigned long t, uint64_t offset,
+			     unsigned int priority)
 {
 	struct io_logs *cur_log;
 
@@ -2700,10 +3028,10 @@ static void __add_log_sample(struct io_log *iolog, union io_sample_data data,
 		s = get_sample(iolog, cur_log, cur_log->nr_samples);
 
 		s->data = data;
-		s->time = t + (iolog->td ? iolog->td->unix_epoch : 0);
+		s->time = t + (iolog->td ? iolog->td->alternate_epoch : 0);
 		io_sample_set_ddir(iolog, s, ddir);
 		s->bs = bs;
-		s->priority_bit = priority_bit;
+		s->priority = priority;
 
 		if (iolog->log_offset) {
 			struct io_sample_offset *so = (void *) s;
@@ -2725,14 +3053,36 @@ static inline void reset_io_stat(struct io_stat *ios)
 	ios->mean.u.f = ios->S.u.f = 0;
 }
 
+static inline void reset_io_u_plat(uint64_t *io_u_plat)
+{
+	int i;
+
+	for (i = 0; i < FIO_IO_U_PLAT_NR; i++)
+		io_u_plat[i] = 0;
+}
+
+static inline void reset_clat_prio_stats(struct thread_stat *ts)
+{
+	enum fio_ddir ddir;
+	int i;
+
+	for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++) {
+		if (!ts->clat_prio[ddir])
+			continue;
+
+		for (i = 0; i < ts->nr_clat_prio[ddir]; i++) {
+			reset_io_stat(&ts->clat_prio[ddir][i].clat_stat);
+			reset_io_u_plat(ts->clat_prio[ddir][i].io_u_plat);
+		}
+	}
+}
+
 void reset_io_stats(struct thread_data *td)
 {
 	struct thread_stat *ts = &td->ts;
 	int i, j;
 
 	for (i = 0; i < DDIR_RWDIR_CNT; i++) {
-		reset_io_stat(&ts->clat_high_prio_stat[i]);
-		reset_io_stat(&ts->clat_prio_stat[i]);
 		reset_io_stat(&ts->clat_stat[i]);
 		reset_io_stat(&ts->slat_stat[i]);
 		reset_io_stat(&ts->lat_stat[i]);
@@ -2744,17 +3094,16 @@ void reset_io_stats(struct thread_data *td)
 		ts->total_io_u[i] = 0;
 		ts->short_io_u[i] = 0;
 		ts->drop_io_u[i] = 0;
-
-		for (j = 0; j < FIO_IO_U_PLAT_NR; j++) {
-			ts->io_u_plat[i][j] = 0;
-			ts->io_u_plat_high_prio[i][j] = 0;
-			ts->io_u_plat_prio[i][j] = 0;
-			if (!i)
-				ts->io_u_sync_plat[j] = 0;
-		}
 	}
 
+	for (i = 0; i < FIO_LAT_CNT; i++)
+		for (j = 0; j < DDIR_RWDIR_CNT; j++)
+			reset_io_u_plat(ts->io_u_plat[i][j]);
+
+	reset_clat_prio_stats(ts);
+
 	ts->total_io_u[DDIR_SYNC] = 0;
+	reset_io_u_plat(ts->io_u_sync_plat);
 
 	for (i = 0; i < FIO_IO_U_MAP_NR; i++) {
 		ts->io_u_map[i] = 0;
@@ -2776,7 +3125,7 @@ void reset_io_stats(struct thread_data *td)
 }
 
 static void __add_stat_to_log(struct io_log *iolog, enum fio_ddir ddir,
-			      unsigned long elapsed, bool log_max, uint8_t priority_bit)
+			      unsigned long elapsed, bool log_max)
 {
 	/*
 	 * Note an entry in the log. Use the mean from the logged samples,
@@ -2791,26 +3140,26 @@ static void __add_stat_to_log(struct io_log *iolog, enum fio_ddir ddir,
 		else
 			data.val = iolog->avg_window[ddir].mean.u.f + 0.50;
 
-		__add_log_sample(iolog, data, ddir, 0, elapsed, 0, priority_bit);
+		__add_log_sample(iolog, data, ddir, 0, elapsed, 0, 0);
 	}
 
 	reset_io_stat(&iolog->avg_window[ddir]);
 }
 
 static void _add_stat_to_log(struct io_log *iolog, unsigned long elapsed,
-			     bool log_max, uint8_t priority_bit)
+			     bool log_max)
 {
-	int ddir;
+	enum fio_ddir ddir;
 
 	for (ddir = 0; ddir < DDIR_RWDIR_CNT; ddir++)
-		__add_stat_to_log(iolog, ddir, elapsed, log_max, priority_bit);
+		__add_stat_to_log(iolog, ddir, elapsed, log_max);
 }
 
 static unsigned long add_log_sample(struct thread_data *td,
 				    struct io_log *iolog,
 				    union io_sample_data data,
 				    enum fio_ddir ddir, unsigned long long bs,
-				    uint64_t offset, uint8_t priority_bit)
+				    uint64_t offset, unsigned int ioprio)
 {
 	unsigned long elapsed, this_window;
 
@@ -2823,7 +3172,8 @@ static unsigned long add_log_sample(struct thread_data *td,
 	 * If no time averaging, just add the log sample.
 	 */
 	if (!iolog->avg_msec) {
-		__add_log_sample(iolog, data, ddir, bs, elapsed, offset, priority_bit);
+		__add_log_sample(iolog, data, ddir, bs, elapsed, offset,
+				 ioprio);
 		return 0;
 	}
 
@@ -2847,9 +3197,10 @@ static unsigned long add_log_sample(struct thread_data *td,
 			return diff;
 	}
 
-	_add_stat_to_log(iolog, elapsed, td->o.log_max != 0, priority_bit);
+	__add_stat_to_log(iolog, ddir, elapsed, td->o.log_max != 0);
+
+	iolog->avg_last[ddir] = elapsed - (elapsed % iolog->avg_msec);
 
-	iolog->avg_last[ddir] = elapsed - (this_window - iolog->avg_msec);
 	return iolog->avg_msec;
 }
 
@@ -2860,19 +3211,19 @@ void finalize_logs(struct thread_data *td, bool unit_logs)
 	elapsed = mtime_since_now(&td->epoch);
 
 	if (td->clat_log && unit_logs)
-		_add_stat_to_log(td->clat_log, elapsed, td->o.log_max != 0, 0);
+		_add_stat_to_log(td->clat_log, elapsed, td->o.log_max != 0);
 	if (td->slat_log && unit_logs)
-		_add_stat_to_log(td->slat_log, elapsed, td->o.log_max != 0, 0);
+		_add_stat_to_log(td->slat_log, elapsed, td->o.log_max != 0);
 	if (td->lat_log && unit_logs)
-		_add_stat_to_log(td->lat_log, elapsed, td->o.log_max != 0, 0);
+		_add_stat_to_log(td->lat_log, elapsed, td->o.log_max != 0);
 	if (td->bw_log && (unit_logs == per_unit_log(td->bw_log)))
-		_add_stat_to_log(td->bw_log, elapsed, td->o.log_max != 0, 0);
+		_add_stat_to_log(td->bw_log, elapsed, td->o.log_max != 0);
 	if (td->iops_log && (unit_logs == per_unit_log(td->iops_log)))
-		_add_stat_to_log(td->iops_log, elapsed, td->o.log_max != 0, 0);
+		_add_stat_to_log(td->iops_log, elapsed, td->o.log_max != 0);
 }
 
-void add_agg_sample(union io_sample_data data, enum fio_ddir ddir, unsigned long long bs,
-					uint8_t priority_bit)
+void add_agg_sample(union io_sample_data data, enum fio_ddir ddir,
+		    unsigned long long bs)
 {
 	struct io_log *iolog;
 
@@ -2880,7 +3231,7 @@ void add_agg_sample(union io_sample_data data, enum fio_ddir ddir, unsigned long
 		return;
 
 	iolog = agg_io_log[ddir];
-	__add_log_sample(iolog, data, ddir, bs, mtime_since_genesis(), 0, priority_bit);
+	__add_log_sample(iolog, data, ddir, bs, mtime_since_genesis(), 0, 0);
 }
 
 void add_sync_clat_sample(struct thread_stat *ts, unsigned long long nsec)
@@ -2892,24 +3243,32 @@ void add_sync_clat_sample(struct thread_stat *ts, unsigned long long nsec)
 	add_stat_sample(&ts->sync_stat, nsec);
 }
 
-static void add_clat_percentile_sample(struct thread_stat *ts,
-				unsigned long long nsec, enum fio_ddir ddir, uint8_t priority_bit)
+static inline void add_lat_percentile_sample(struct thread_stat *ts,
+					     unsigned long long nsec,
+					     enum fio_ddir ddir,
+					     enum fio_lat lat)
 {
 	unsigned int idx = plat_val_to_idx(nsec);
 	assert(idx < FIO_IO_U_PLAT_NR);
 
-	ts->io_u_plat[ddir][idx]++;
+	ts->io_u_plat[lat][ddir][idx]++;
+}
 
-	if (!priority_bit) {
-		ts->io_u_plat_prio[ddir][idx]++;
-	} else {
-		ts->io_u_plat_high_prio[ddir][idx]++;
-	}
+static inline void
+add_lat_percentile_prio_sample(struct thread_stat *ts, unsigned long long nsec,
+			       enum fio_ddir ddir,
+			       unsigned short clat_prio_index)
+{
+	unsigned int idx = plat_val_to_idx(nsec);
+
+	if (ts->clat_prio[ddir])
+		ts->clat_prio[ddir][clat_prio_index].io_u_plat[idx]++;
 }
 
 void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
 		     unsigned long long nsec, unsigned long long bs,
-		     uint64_t offset, uint8_t priority_bit)
+		     uint64_t offset, unsigned int ioprio,
+		     unsigned short clat_prio_index)
 {
 	const bool needs_lock = td_async_processing(td);
 	unsigned long elapsed, this_window;
@@ -2921,18 +3280,33 @@ void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
 
 	add_stat_sample(&ts->clat_stat[ddir], nsec);
 
-	if (priority_bit) {
-		add_stat_sample(&ts->clat_high_prio_stat[ddir], nsec);
-	} else {
-		add_stat_sample(&ts->clat_prio_stat[ddir], nsec);
-	}
+	/*
+	 * When lat_percentiles=1 (default 0), the reported per priority
+	 * percentiles and stats are used for describing total latency values,
+	 * even though the variable names themselves start with clat_.
+	 *
+	 * Because of the above definition, add a prio stat sample only when
+	 * lat_percentiles=0. add_lat_sample() will add the prio stat sample
+	 * when lat_percentiles=1.
+	 */
+	if (!ts->lat_percentiles)
+		add_stat_prio_sample(ts->clat_prio[ddir], clat_prio_index,
+				     nsec);
 
 	if (td->clat_log)
 		add_log_sample(td, td->clat_log, sample_val(nsec), ddir, bs,
-			       offset, priority_bit);
+			       offset, ioprio);
 
 	if (ts->clat_percentiles) {
-		add_clat_percentile_sample(ts, nsec, ddir, priority_bit);
+		/*
+		 * Because of the above definition, add a prio lat percentile
+		 * sample only when lat_percentiles=0. add_lat_sample() will add
+		 * the prio lat percentile sample when lat_percentiles=1.
+		 */
+		add_lat_percentile_sample(ts, nsec, ddir, FIO_CLAT);
+		if (!ts->lat_percentiles)
+			add_lat_percentile_prio_sample(ts, nsec, ddir,
+						       clat_prio_index);
 	}
 
 	if (iolog && iolog->hist_msec) {
@@ -2955,13 +3329,13 @@ void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
 			 * located in iolog.c after printing this sample to the
 			 * log file.
 			 */
-			io_u_plat = (uint64_t *) td->ts.io_u_plat[ddir];
+			io_u_plat = (uint64_t *) td->ts.io_u_plat[FIO_CLAT][ddir];
 			dst = malloc(sizeof(struct io_u_plat_entry));
 			memcpy(&(dst->io_u_plat), io_u_plat,
 				FIO_IO_U_PLAT_NR * sizeof(uint64_t));
 			flist_add(&dst->list, &hw->list);
 			__add_log_sample(iolog, sample_plat(dst), ddir, bs,
-						elapsed, offset, priority_bit);
+					 elapsed, offset, ioprio);
 
 			/*
 			 * Update the last time we recorded as being now, minus
@@ -2978,8 +3352,8 @@ void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
 }
 
 void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
-			unsigned long usec, unsigned long long bs, uint64_t offset,
-			uint8_t priority_bit)
+		     unsigned long long nsec, unsigned long long bs,
+		     uint64_t offset, unsigned int ioprio)
 {
 	const bool needs_lock = td_async_processing(td);
 	struct thread_stat *ts = &td->ts;
@@ -2990,11 +3364,14 @@ void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
 	if (needs_lock)
 		__td_io_u_lock(td);
 
-	add_stat_sample(&ts->slat_stat[ddir], usec);
+	add_stat_sample(&ts->slat_stat[ddir], nsec);
 
 	if (td->slat_log)
-		add_log_sample(td, td->slat_log, sample_val(usec), ddir, bs, offset,
-			priority_bit);
+		add_log_sample(td, td->slat_log, sample_val(nsec), ddir, bs,
+			       offset, ioprio);
+
+	if (ts->slat_percentiles)
+		add_lat_percentile_sample(ts, nsec, ddir, FIO_SLAT);
 
 	if (needs_lock)
 		__td_io_u_unlock(td);
@@ -3002,7 +3379,8 @@ void add_slat_sample(struct thread_data *td, enum fio_ddir ddir,
 
 void add_lat_sample(struct thread_data *td, enum fio_ddir ddir,
 		    unsigned long long nsec, unsigned long long bs,
-		    uint64_t offset, uint8_t priority_bit)
+		    uint64_t offset, unsigned int ioprio,
+		    unsigned short clat_prio_index)
 {
 	const bool needs_lock = td_async_processing(td);
 	struct thread_stat *ts = &td->ts;
@@ -3017,11 +3395,24 @@ void add_lat_sample(struct thread_data *td, enum fio_ddir ddir,
 
 	if (td->lat_log)
 		add_log_sample(td, td->lat_log, sample_val(nsec), ddir, bs,
-			       offset, priority_bit);
-
-	if (ts->lat_percentiles)
-		add_clat_percentile_sample(ts, nsec, ddir, priority_bit);
+			       offset, ioprio);
 
+	/*
+	 * When lat_percentiles=1 (default 0), the reported per priority
+	 * percentiles and stats are used for describing total latency values,
+	 * even though the variable names themselves start with clat_.
+	 *
+	 * Because of the above definition, add a prio stat and prio lat
+	 * percentile sample only when lat_percentiles=1. add_clat_sample() will
+	 * add the prio stat and prio lat percentile sample when
+	 * lat_percentiles=0.
+	 */
+	if (ts->lat_percentiles) {
+		add_lat_percentile_sample(ts, nsec, ddir, FIO_LAT);
+		add_lat_percentile_prio_sample(ts, nsec, ddir, clat_prio_index);
+		add_stat_prio_sample(ts->clat_prio[ddir], clat_prio_index,
+				     nsec);
+	}
 	if (needs_lock)
 		__td_io_u_unlock(td);
 }
@@ -3045,7 +3436,7 @@ void add_bw_sample(struct thread_data *td, struct io_u *io_u,
 
 	if (td->bw_log)
 		add_log_sample(td, td->bw_log, sample_val(rate), io_u->ddir,
-			       bytes, io_u->offset, io_u_is_prio(io_u));
+			       bytes, io_u->offset, io_u->ioprio);
 
 	td->stat_io_bytes[io_u->ddir] = td->this_io_bytes[io_u->ddir];
 
@@ -3067,7 +3458,7 @@ static int __add_samples(struct thread_data *td, struct timespec *parent_tv,
 	next_log = avg_time;
 
 	spent = mtime_since(parent_tv, t);
-	if (spent < avg_time && avg_time - spent >= LOG_MSEC_SLACK)
+	if (spent < avg_time && avg_time - spent > LOG_MSEC_SLACK)
 		return avg_time - spent;
 
 	if (needs_lock)
@@ -3099,7 +3490,8 @@ static int __add_samples(struct thread_data *td, struct timespec *parent_tv,
 			if (td->o.min_bs[ddir] == td->o.max_bs[ddir])
 				bs = td->o.min_bs[ddir];
 
-			next = add_log_sample(td, log, sample_val(rate), ddir, bs, 0, 0);
+			next = add_log_sample(td, log, sample_val(rate), ddir,
+					      bs, 0, 0);
 			next_log = min(next_log, next);
 		}
 
@@ -3139,7 +3531,7 @@ void add_iops_sample(struct thread_data *td, struct io_u *io_u,
 
 	if (td->iops_log)
 		add_log_sample(td, td->iops_log, sample_val(1), io_u->ddir,
-			       bytes, io_u->offset, io_u_is_prio(io_u));
+			       bytes, io_u->offset, io_u->ioprio);
 
 	td->stat_io_blocks[io_u->ddir] = td->this_io_blocks[io_u->ddir];
 
@@ -3160,13 +3552,16 @@ static int add_iops_samples(struct thread_data *td, struct timespec *t)
 int calc_log_samples(void)
 {
 	struct thread_data *td;
-	unsigned int next = ~0U, tmp;
+	unsigned int next = ~0U, tmp = 0, next_mod = 0, log_avg_msec_min = -1U;
 	struct timespec now;
 	int i;
+	long elapsed_time = 0;
 
 	fio_gettime(&now, NULL);
 
 	for_each_td(td, i) {
+		elapsed_time = mtime_since_now(&td->epoch);
+
 		if (!td->o.stats)
 			continue;
 		if (in_ramp_time(td) ||
@@ -3177,17 +3572,34 @@ int calc_log_samples(void)
 		if (!td->bw_log ||
 			(td->bw_log && !per_unit_log(td->bw_log))) {
 			tmp = add_bw_samples(td, &now);
-			if (tmp < next)
-				next = tmp;
+
+			if (td->bw_log)
+				log_avg_msec_min = min(log_avg_msec_min, (unsigned int)td->bw_log->avg_msec);
 		}
 		if (!td->iops_log ||
 			(td->iops_log && !per_unit_log(td->iops_log))) {
 			tmp = add_iops_samples(td, &now);
-			if (tmp < next)
-				next = tmp;
+
+			if (td->iops_log)
+				log_avg_msec_min = min(log_avg_msec_min, (unsigned int)td->iops_log->avg_msec);
 		}
+
+		if (tmp < next)
+			next = tmp;
 	}
 
+	/* if log_avg_msec_min has not been changed, set it to 0 */
+	if (log_avg_msec_min == -1U)
+		log_avg_msec_min = 0;
+
+	if (log_avg_msec_min == 0)
+		next_mod = elapsed_time;
+	else
+		next_mod = elapsed_time % log_avg_msec_min;
+
+	/* correction to keep the time on the log avg msec boundary */
+	next = min(next, (log_avg_msec_min - next_mod));
+
 	return next == ~0U ? 0 : next;
 }
 
@@ -3224,3 +3636,4 @@ uint32_t *io_u_block_info(struct thread_data *td, struct io_u *io_u)
 	assert(idx < td->ts.nr_block_infos);
 	return info;
 }
+