X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=stat.c;h=80e3b1681245de82e76f2f763088624335374651;hb=32df42c978ffb0faee36ffb0866f7786ab1209e1;hp=96cd7649b7cf69c4fa82311b97d9532230b86811;hpb=0b2eef4940d9818f91f455d0cdb4f37db4fbb158;p=fio.git

diff --git a/stat.c b/stat.c
index 96cd7649..80e3b168 100644
--- a/stat.c
+++ b/stat.c
@@ -18,6 +18,8 @@
 #include "helper_thread.h"
 #include "smalloc.h"
 
+#define LOG_MSEC_SLACK	10
+
 struct fio_mutex *stat_mutex;
 
 void clear_rusage_stat(struct thread_data *td)
@@ -655,6 +657,33 @@ static void show_block_infos(int nr_block_infos, uint32_t *block_infos,
 			 i == BLOCK_STATE_COUNT - 1 ? '\n' : ',');
 }
 
+static void show_ss_normal(struct thread_stat *ts, struct buf_output *out)
+{
+	char *p1, *p2;
+	unsigned long long bw_mean, iops_mean;
+	const int i2p = is_power_of_2(ts->kb_base);
+
+	if (!ts->ss_dur)
+		return;
+
+	bw_mean = steadystate_bw_mean(ts);
+	iops_mean = steadystate_iops_mean(ts);
+
+	p1 = num2str(bw_mean / ts->kb_base, 6, ts->kb_base, i2p, ts->unit_base);
+	p2 = num2str(iops_mean, 6, 1, 0, 0);
+
+	log_buf(out, "  steadystate  : attained=%s, bw=%s/s, iops=%s, %s%s=%.3f%s\n",
+		ts->ss_state & __FIO_SS_ATTAINED ? "yes" : "no",
+		p1, p2,
+		ts->ss_state & __FIO_SS_IOPS ? "iops" : "bw",
+		ts->ss_state & __FIO_SS_SLOPE ? " slope": " mean dev",
+		ts->ss_criterion.u.f,
+		ts->ss_state & __FIO_SS_PCT ? "%" : "");
+
+	free(p1);
+	free(p2);
+}
+
 static void show_thread_status_normal(struct thread_stat *ts,
 				      struct group_run_stats *rs,
 				      struct buf_output *out)
@@ -759,6 +788,9 @@ static void show_thread_status_normal(struct thread_stat *ts,
 	if (ts->nr_block_infos)
 		show_block_infos(ts->nr_block_infos, ts->block_infos,
 				  ts->percentile_list, out);
+
+	if (ts->ss_dur)
+		show_ss_normal(ts, out);
 }
 
 static void show_ddir_status_terse(struct thread_stat *ts,
@@ -1253,6 +1285,56 @@ static struct json_object *show_thread_status_json(struct thread_stat *ts,
 		}
 	}
 
+	if (ts->ss_dur) {
+		struct json_object *data;
+		struct json_array *iops, *bw;
+		int i, j, k;
+		char ss_buf[64];
+
+		snprintf(ss_buf, sizeof(ss_buf), "%s%s:%f%s",
+			ts->ss_state & __FIO_SS_IOPS ? "iops" : "bw",
+			ts->ss_state & __FIO_SS_SLOPE ? "_slope" : "",
+			(float) ts->ss_limit.u.f,
+			ts->ss_state & __FIO_SS_PCT ? "%" : "");
+
+		tmp = json_create_object();
+		json_object_add_value_object(root, "steadystate", tmp);
+		json_object_add_value_string(tmp, "ss", ss_buf);
+		json_object_add_value_int(tmp, "duration", (int)ts->ss_dur);
+		json_object_add_value_int(tmp, "attained", (ts->ss_state & __FIO_SS_ATTAINED) > 0);
+
+		snprintf(ss_buf, sizeof(ss_buf), "%f%s", (float) ts->ss_criterion.u.f,
+			ts->ss_state & __FIO_SS_PCT ? "%" : "");
+		json_object_add_value_string(tmp, "criterion", ss_buf);
+		json_object_add_value_float(tmp, "max_deviation", ts->ss_deviation.u.f);
+		json_object_add_value_float(tmp, "slope", ts->ss_slope.u.f);
+
+		data = json_create_object();
+		json_object_add_value_object(tmp, "data", data);
+		bw = json_create_array();
+		iops = json_create_array();
+
+		/*
+		** if ss was attained or the buffer is not full,
+		** ss->head points to the first element in the list.
+		** otherwise it actually points to the second element
+		** in the list
+		*/
+		if ((ts->ss_state & __FIO_SS_ATTAINED) || !(ts->ss_state & __FIO_SS_BUFFER_FULL))
+			j = ts->ss_head;
+		else
+			j = ts->ss_head == 0 ? ts->ss_dur - 1 : ts->ss_head - 1;
+		for (i = 0; i < ts->ss_dur; i++) {
+			k = (j + i) % ts->ss_dur;
+			json_array_add_value_int(bw, ts->ss_bw_data[k]);
+			json_array_add_value_int(iops, ts->ss_iops_data[k]);
+		}
+		json_object_add_value_int(data, "bw_mean", steadystate_bw_mean(ts));
+		json_object_add_value_int(data, "iops_mean", steadystate_iops_mean(ts));
+		json_object_add_value_array(data, "iops", iops);
+		json_object_add_value_array(data, "bw", bw);
+	}
+
 	return root;
 }
 
@@ -1576,6 +1658,20 @@ void __show_run_stats(void)
 			ts->block_infos[k] = td->ts.block_infos[k];
 
 		sum_thread_stats(ts, &td->ts, idx == 1);
+
+		if (td->o.ss_dur) {
+			ts->ss_state = td->ss.state;
+			ts->ss_dur = td->ss.dur;
+			ts->ss_head = td->ss.head;
+			ts->ss_bw_data = td->ss.bw_data;
+			ts->ss_iops_data = td->ss.iops_data;
+			ts->ss_limit.u.f = td->ss.limit;
+			ts->ss_slope.u.f = td->ss.slope;
+			ts->ss_deviation.u.f = td->ss.deviation;
+			ts->ss_criterion.u.f = td->ss.criterion;
+		}
+		else
+			ts->ss_dur = ts->ss_state = 0;
 	}
 
 	for (i = 0; i < nr_ts; i++) {
@@ -1963,6 +2059,7 @@ void regrow_logs(struct thread_data *td)
 {
 	regrow_log(td->slat_log);
 	regrow_log(td->clat_log);
+	regrow_log(td->clat_hist_log);
 	regrow_log(td->lat_log);
 	regrow_log(td->bw_log);
 	regrow_log(td->iops_log);
@@ -2107,14 +2204,14 @@ static void _add_stat_to_log(struct io_log *iolog, unsigned long elapsed,
 		__add_stat_to_log(iolog, ddir, elapsed, log_max);
 }
 
-static void add_log_sample(struct thread_data *td, struct io_log *iolog,
+static long add_log_sample(struct thread_data *td, struct io_log *iolog,
 			   unsigned long val, enum fio_ddir ddir,
 			   unsigned int bs, uint64_t offset)
 {
 	unsigned long elapsed, this_window;
 
 	if (!ddir_rw(ddir))
-		return;
+		return 0;
 
 	elapsed = mtime_since_now(&td->epoch);
 
@@ -2123,7 +2220,7 @@ static void add_log_sample(struct thread_data *td, struct io_log *iolog,
 	 */
 	if (!iolog->avg_msec) {
 		__add_log_sample(iolog, val, ddir, bs, elapsed, offset);
-		return;
+		return 0;
 	}
 
 	/*
@@ -2137,12 +2234,19 @@ static void add_log_sample(struct thread_data *td, struct io_log *iolog,
 	 * need to do.
 	 */
 	this_window = elapsed - iolog->avg_last;
-	if (this_window < iolog->avg_msec)
-		return;
+	if (elapsed < iolog->avg_last)
+		return iolog->avg_last - elapsed;
+	else if (this_window < iolog->avg_msec) {
+		int diff = iolog->avg_msec - this_window;
+
+		if (inline_log(iolog) || diff > LOG_MSEC_SLACK)
+			return diff;
+	}
 
 	_add_stat_to_log(iolog, elapsed, td->o.log_max != 0);
 
-	iolog->avg_last = elapsed;
+	iolog->avg_last = elapsed - (this_window - iolog->avg_msec);
+	return iolog->avg_msec;
 }
 
 void finalize_logs(struct thread_data *td, bool unit_logs)
@@ -2186,7 +2290,9 @@ static void add_clat_percentile_sample(struct thread_stat *ts,
 void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
 		     unsigned long usec, unsigned int bs, uint64_t offset)
 {
+	unsigned long elapsed, this_window;
 	struct thread_stat *ts = &td->ts;
+	struct io_log *iolog = td->clat_hist_log;
 
 	td_io_u_lock(td);
 
@@ -2198,6 +2304,43 @@ void add_clat_sample(struct thread_data *td, enum fio_ddir ddir,
 	if (ts->clat_percentiles)
 		add_clat_percentile_sample(ts, usec, ddir);
 
+	if (iolog && iolog->hist_msec) {
+		struct io_hist *hw = &iolog->hist_window[ddir];
+
+		hw->samples++;
+		elapsed = mtime_since_now(&td->epoch);
+		if (!hw->hist_last)
+			hw->hist_last = elapsed;
+		this_window = elapsed - hw->hist_last;
+		
+		if (this_window >= iolog->hist_msec) {
+			unsigned int *io_u_plat;
+			unsigned int *dst;
+
+			/*
+			 * Make a byte-for-byte copy of the latency histogram
+			 * stored in td->ts.io_u_plat[ddir], recording it in a
+			 * log sample. Note that the matching call to free() is
+			 * located in iolog.c after printing this sample to the
+			 * log file.
+			 */
+			io_u_plat = (unsigned int *) td->ts.io_u_plat[ddir];
+			dst = malloc(FIO_IO_U_PLAT_NR * sizeof(unsigned int));
+			memcpy(dst, io_u_plat,
+				FIO_IO_U_PLAT_NR * sizeof(unsigned int));
+			__add_log_sample(iolog, (unsigned long )dst, ddir, bs,
+						elapsed, offset);
+
+			/*
+			 * Update the last time we recorded as being now, minus
+			 * any drift in time we encountered before actually
+			 * making the record.
+			 */
+			hw->hist_last = elapsed - (this_window - iolog->hist_msec);
+			hw->samples = 0;
+		}
+	}
+
 	td_io_u_unlock(td);
 }
 
@@ -2264,10 +2407,13 @@ static int add_bw_samples(struct thread_data *td, struct timeval *t)
 	struct thread_stat *ts = &td->ts;
 	unsigned long spent, rate;
 	enum fio_ddir ddir;
+	unsigned int next, next_log;
+
+	next_log = td->o.bw_avg_time;
 
 	spent = mtime_since(&td->bw_sample_time, t);
 	if (spent < td->o.bw_avg_time &&
-	    td->o.bw_avg_time - spent >= 10)
+	    td->o.bw_avg_time - spent >= LOG_MSEC_SLACK)
 		return td->o.bw_avg_time - spent;
 
 	td_io_u_lock(td);
@@ -2295,7 +2441,8 @@ static int add_bw_samples(struct thread_data *td, struct timeval *t)
 			if (td->o.min_bs[ddir] == td->o.max_bs[ddir])
 				bs = td->o.min_bs[ddir];
 
-			add_log_sample(td, td->bw_log, rate, ddir, bs, 0);
+			next = add_log_sample(td, td->bw_log, rate, ddir, bs, 0);
+			next_log = min(next_log, next);
 		}
 
 		td->stat_io_bytes[ddir] = td->this_io_bytes[ddir];
@@ -2306,9 +2453,10 @@ static int add_bw_samples(struct thread_data *td, struct timeval *t)
 	td_io_u_unlock(td);
 
 	if (spent <= td->o.bw_avg_time)
-		return td->o.bw_avg_time;
+		return min(next_log, td->o.bw_avg_time);
 
-	return td->o.bw_avg_time - (1 + spent - td->o.bw_avg_time);
+	next = td->o.bw_avg_time - (1 + spent - td->o.bw_avg_time);
+	return min(next, next_log);
 }
 
 void add_iops_sample(struct thread_data *td, struct io_u *io_u,
@@ -2332,10 +2480,13 @@ static int add_iops_samples(struct thread_data *td, struct timeval *t)
 	struct thread_stat *ts = &td->ts;
 	unsigned long spent, iops;
 	enum fio_ddir ddir;
+	unsigned int next, next_log;
+
+	next_log = td->o.iops_avg_time;
 
 	spent = mtime_since(&td->iops_sample_time, t);
 	if (spent < td->o.iops_avg_time &&
-	    td->o.iops_avg_time - spent >= 10)
+	    td->o.iops_avg_time - spent >= LOG_MSEC_SLACK)
 		return td->o.iops_avg_time - spent;
 
 	td_io_u_lock(td);
@@ -2363,7 +2514,8 @@ static int add_iops_samples(struct thread_data *td, struct timeval *t)
 			if (td->o.min_bs[ddir] == td->o.max_bs[ddir])
 				bs = td->o.min_bs[ddir];
 
-			add_log_sample(td, td->iops_log, iops, ddir, bs, 0);
+			next = add_log_sample(td, td->iops_log, iops, ddir, bs, 0);
+			next_log = min(next_log, next);
 		}
 
 		td->stat_io_blocks[ddir] = td->this_io_blocks[ddir];
@@ -2374,9 +2526,10 @@ static int add_iops_samples(struct thread_data *td, struct timeval *t)
 	td_io_u_unlock(td);
 
 	if (spent <= td->o.iops_avg_time)
-		return td->o.iops_avg_time;
+		return min(next_log, td->o.iops_avg_time);
 
-	return td->o.iops_avg_time - (1 + spent - td->o.iops_avg_time);
+	next = td->o.iops_avg_time - (1 + spent - td->o.iops_avg_time);
+	return min(next, next_log);
 }
 
 /*