X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=steadystate.c;h=bce35b9718f237512597cba8a7710d890d705280;hp=696ad164ac2fe159d180a7744d9b4d8a6fd0f323;hb=0c13c9699c668990a18261141bab612598bc47d5;hpb=e6a6a9844038b1e4dd8f979c37579be695c770d0

diff --git a/steadystate.c b/steadystate.c
index 696ad164..bce35b97 100644
--- a/steadystate.c
+++ b/steadystate.c
@@ -10,11 +10,13 @@ static void steadystate_alloc(struct thread_data *td)
 {
 	int i;
 
-	td->ss.bw_data = malloc(td->ss.dur * sizeof(unsigned long));
-	td->ss.iops_data = malloc(td->ss.dur * sizeof(unsigned long));
+	td->ss.bw_data = malloc(td->ss.dur * sizeof(uint64_t));
+	td->ss.iops_data = malloc(td->ss.dur * sizeof(uint64_t));
 	/* initialize so that it is obvious if the cache is not full in the output */
 	for (i = 0; i < td->ss.dur; i++)
 		td->ss.iops_data[i] = td->ss.bw_data[i] = 0;
+
+	td->ss.state |= __FIO_SS_DATA;
 }
 
 void steadystate_setup(void)
@@ -33,7 +35,7 @@ void steadystate_setup(void)
 	prev_groupid = -1;
 	prev_td = NULL;
 	for_each_td(td, i) {
-		if (td->ts.ss == NULL)
+		if (!td->ss.dur)
 			continue;
 
 		if (!td->o.group_reporting) {
@@ -43,7 +45,6 @@ void steadystate_setup(void)
 
 		if (prev_groupid != td->groupid) {
 			if (prev_td != NULL) {
-				prev_td->ss.state |= __FIO_SS_DATA;
 				steadystate_alloc(prev_td);
 			}
 			prev_groupid = td->groupid;
@@ -52,18 +53,17 @@ void steadystate_setup(void)
 	}
 
 	if (prev_td != NULL && prev_td->o.group_reporting) {
-		prev_td->ss.state |= __FIO_SS_DATA;
 		steadystate_alloc(prev_td);
 	}
 }
 
-static bool steadystate_slope(unsigned long iops, unsigned long bw,
+static bool steadystate_slope(uint64_t iops, uint64_t bw,
 			      struct thread_data *td)
 {
 	int i, j;
 	double result;
 	struct steadystate_data *ss = &td->ss;
-	unsigned long new_val;
+	uint64_t new_val;
 
 	ss->bw_data[ss->tail] = bw;
 	ss->iops_data[ss->tail] = iops;
@@ -73,21 +73,21 @@ static bool steadystate_slope(unsigned long iops, unsigned long bw,
 	else
 		new_val = bw;
 
-	if (ss->tail < ss->head || (ss->tail - ss->head == ss->dur - 1)) {
-		if (ss->sum_y == 0) {	/* first time through */
-			for(i = 0; i < ss->dur; i++) {
+	if (ss->state & __FIO_SS_BUFFER_FULL || ss->tail - ss->head == ss->dur - 1) {
+		if (!(ss->state & __FIO_SS_BUFFER_FULL)) {
+			/* first time through */
+			for(i = 0, ss->sum_y = 0; i < ss->dur; i++) {
 				if (ss->state & __FIO_SS_IOPS)
 					ss->sum_y += ss->iops_data[i];
 				else
 					ss->sum_y += ss->bw_data[i];
-				j = ss->head + i;
-				if (j >= ss->dur)
-					j -= ss->dur;
+				j = (ss->head + i) % ss->dur;
 				if (ss->state & __FIO_SS_IOPS)
 					ss->sum_xy += i * ss->iops_data[j];
 				else
 					ss->sum_xy += i * ss->bw_data[j];
 			}
+			ss->state |= __FIO_SS_BUFFER_FULL;
 		} else {		/* easy to update the sums */
 			ss->sum_y -= ss->oldest_y;
 			ss->sum_y += new_val;
@@ -114,8 +114,9 @@ static bool steadystate_slope(unsigned long iops, unsigned long bw,
 
 		dprint(FD_STEADYSTATE, "sum_y: %llu, sum_xy: %llu, slope: %f, "
 					"criterion: %f, limit: %f\n",
-					ss->sum_y, ss->sum_xy, ss->slope,
-					ss->criterion, ss->limit);
+					(unsigned long long) ss->sum_y,
+					(unsigned long long) ss->sum_xy,
+					ss->slope, ss->criterion, ss->limit);
 
 		result = ss->criterion * (ss->criterion < 0.0 ? -1.0 : 1.0);
 		if (result < ss->limit)
@@ -129,7 +130,7 @@ static bool steadystate_slope(unsigned long iops, unsigned long bw,
 	return false;
 }
 
-static bool steadystate_deviation(unsigned long iops, unsigned long bw,
+static bool steadystate_deviation(uint64_t iops, uint64_t bw,
 				  struct thread_data *td)
 {
 	int i;
@@ -141,13 +142,15 @@ static bool steadystate_deviation(unsigned long iops, unsigned long bw,
 	ss->bw_data[ss->tail] = bw;
 	ss->iops_data[ss->tail] = iops;
 
-	if (ss->tail < ss->head || (ss->tail - ss->head == ss->dur - 1)) {
-		if (ss->sum_y == 0) {	/* first time through */
-			for(i = 0; i < ss->dur; i++)
+	if (ss->state & __FIO_SS_BUFFER_FULL || ss->tail - ss->head == ss->dur - 1) {
+		if (!(ss->state & __FIO_SS_BUFFER_FULL)) {
+			/* first time through */
+			for(i = 0, ss->sum_y = 0; i < ss->dur; i++)
 				if (ss->state & __FIO_SS_IOPS)
 					ss->sum_y += ss->iops_data[i];
 				else
 					ss->sum_y += ss->bw_data[i];
+			ss->state |= __FIO_SS_BUFFER_FULL;
 		} else {		/* easy to update the sum */
 			ss->sum_y -= ss->oldest_y;
 			if (ss->state & __FIO_SS_IOPS)
@@ -179,8 +182,8 @@ static bool steadystate_deviation(unsigned long iops, unsigned long bw,
 
 		dprint(FD_STEADYSTATE, "sum_y: %llu, mean: %f, max diff: %f, "
 					"objective: %f, limit: %f\n",
-					ss->sum_y, mean, ss->deviation,
-					ss->criterion, ss->limit);
+					(unsigned long long) ss->sum_y, mean,
+					ss->deviation, ss->criterion, ss->limit);
 
 		if (ss->criterion < ss->limit)
 			return true;
@@ -199,9 +202,8 @@ void steadystate_check(void)
 	unsigned long rate_time;
 	struct thread_data *td, *td2;
 	struct timeval now;
-	unsigned long group_bw = 0, group_iops = 0;
-	unsigned long long td_iops;
-	unsigned long long td_bytes;
+	uint64_t group_bw = 0, group_iops = 0;
+	uint64_t td_iops, td_bytes;
 	bool ret;
 
 	prev_groupid = -1;
@@ -209,7 +211,8 @@ void steadystate_check(void)
 		struct steadystate_data *ss = &td->ss;
 
 		if (!ss->dur || td->runstate <= TD_SETTING_UP ||
-		    td->runstate >= TD_EXITED || (ss->state & __FIO_SS_ATTAINED))
+		    td->runstate >= TD_EXITED || !ss->state ||
+		    ss->state & __FIO_SS_ATTAINED)
 			continue;
 
 		td_iops = 0;
@@ -269,9 +272,11 @@ void steadystate_check(void)
 
 		dprint(FD_STEADYSTATE, "steadystate_check() thread: %d, "
 					"groupid: %u, rate_msec: %ld, "
-					"iops: %lu, bw: %lu, head: %d, tail: %d\n",
-					i, td->groupid, rate_time, group_iops,
-					group_bw, ss->head, ss->tail);
+					"iops: %llu, bw: %llu, head: %d, tail: %d\n",
+					i, td->groupid, rate_time,
+					(unsigned long long) group_iops,
+					(unsigned long long) group_bw,
+					ss->head, ss->tail);
 
 		if (td->o.ss & __FIO_SS_SLOPE)
 			ret = steadystate_slope(group_iops, group_bw, td);
@@ -318,8 +323,6 @@ int td_steadystate_init(struct thread_data *td)
 
 		ss->sum_x = o->ss_dur * (o->ss_dur - 1) / 2;
 		ss->sum_x_sq = (o->ss_dur - 1) * (o->ss_dur) * (2*o->ss_dur - 1) / 6;
-
-		td->ts.ss = ss;
 	}
 
 	/* make sure that ss options are consistent within reporting group */
@@ -341,3 +344,25 @@ int td_steadystate_init(struct thread_data *td)
 
 	return 0;
 }
+
+uint64_t steadystate_bw_mean(struct thread_stat *ts)
+{
+	int i;
+	uint64_t sum;
+
+	for (i = 0, sum = 0; i < ts->ss_dur; i++)
+		sum += ts->ss_bw_data[i];
+
+	return sum / ts->ss_dur;
+}
+
+uint64_t steadystate_iops_mean(struct thread_stat *ts)
+{
+	int i;
+	uint64_t sum;
+
+	for (i = 0, sum = 0; i < ts->ss_dur; i++)
+		sum += ts->ss_iops_data[i];
+
+	return sum / ts->ss_dur;
+}