From: Michal Sojka <sojkam1@fel.cvut.cz>
Date: Fri, 17 Oct 2014 13:36:25 +0000 (+0200)
Subject: latester: Add statistics about data out of histogram range
X-Git-Tag: pc-sw-update~8
X-Git-Url: http://rtime.felk.cvut.cz/gitweb/can-benchmark.git/commitdiff_plain/869acdaf3491ca1072f6284a260e6e648af2c271

latester: Add statistics about data out of histogram range
---

diff --git a/latester/histogram.h b/latester/histogram.h
index b4546e4..52dc664 100644
--- a/latester/histogram.h
+++ b/latester/histogram.h
@@ -3,6 +3,7 @@
 
 struct histogram {
 	unsigned *data;
+	unsigned out_below, out_above;
 	unsigned allocated;
 	unsigned resolution;
 };
@@ -14,6 +15,7 @@ int histogram_init(struct histogram *h,
 	size_t mem;
 	h->allocated = max_value/resolution + 1;
 	h->resolution = resolution;
+	h->out_below = h->out_above = 0;
 	mem = h->allocated*sizeof(*h->data);
 	h->data = malloc(mem);
 	if (h->data) {
@@ -25,10 +27,15 @@ int histogram_init(struct histogram *h,
 
 void histogram_add(struct histogram *h, int value)
 {
-	if (value < 0) value = 0;
+	if (value < 0) {
+		h->out_below++;
+		return;
+	}
 	unsigned index = value / h->resolution;
-	if (index >= h->allocated)
+	if (index >= h->allocated) {
+		h->out_above++;
 		index = h->allocated - 1;
+	}
 	h->data[index]++;
 }
 
@@ -56,6 +63,7 @@ struct histogram_stats {
 	unsigned count;
 	unsigned long long sum;
 	unsigned avg;
+	unsigned below, above; 	/* Count of data out of histogram range */
 	unsigned percentile[101];
 };
 
@@ -87,6 +95,9 @@ void histogram_stats(struct histogram *h, struct histogram_stats *s)
 	while (sum < i * s->count / 100)
 		sum += h->data[j++];
 	s->percentile[100] = (j-1) * h->resolution;
+
+	s->below = h->out_below;
+	s->above = h->out_above;
 }
 
 #endif
diff --git a/latester/latester.c b/latester/latester.c
index ff627dc..72e123b 100644
--- a/latester/latester.c
+++ b/latester/latester.c
@@ -894,6 +894,8 @@ int main(int argc, const char *argv[])
 		histogram_stats(&histogram_gw, &hs);
 		double avg = hs.count ? (double)hs.sum/hs.count : 0;
 		fprintf(opt.f_stat, "avg=%g\n", avg);
+		fprintf(opt.f_stat, "out_of_range_below=%d\n", hs.below);
+		fprintf(opt.f_stat, "out_of_range_above=%d\n", hs.above);
 		for (i = 0; i <= 20; i++)
 			fprintf(opt.f_stat, "percentile%d=%d\n", i*5, hs.percentile[i*5]);