From: Anders Björklund <anders@itension.se>
Date: Thu, 7 Jul 2016 18:41:43 +0000 (+0200)
Subject: Show cache hit rate (%) in stats display
X-Git-Tag: v3.3~52
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9f27c98f438e5801c8cc8d99743ab78d1a8c4b86;p=thirdparty%2Fccache.git

Show cache hit rate (%) in stats display

Closes #94
---

diff --git a/stats.c b/stats.c
index e9a8f09e8..22e634280 100644
--- a/stats.c
+++ b/stats.c
@@ -282,6 +282,9 @@ stats_summary(struct conf *conf)
 {
 	int dir, i;
 	struct counters *counters = counters_init(STATS_END);
+	unsigned direct = 0, preprocessed = 0;
+	unsigned hit, miss, total;
+	double percent;
 
 	assert(conf);
 
@@ -323,6 +326,22 @@ stats_summary(struct conf *conf)
 		} else {
 			printf("%8u\n", counters->data[stat]);
 		}
+
+		if (stat == STATS_CACHEHIT_DIR) {
+			direct = counters->data[stat];
+		} else if (stat == STATS_CACHEHIT_CPP) {
+			preprocessed = counters->data[stat];
+		} else if (stat == STATS_TOCACHE) {
+			miss = counters->data[stat];
+			hit = direct + preprocessed;
+			total = hit + miss;
+			if (total > 0) {
+				percent = (100.0f * hit) / total;
+			} else {
+				percent = 0.0f;
+			}
+			printf("cache hit rate                    %6.2f %%\n", percent);
+		}
 	}
 
 	if (conf->max_files != 0) {