From: Jens Axboe <axboe@fb.com>
Date: Tue, 7 Oct 2014 03:07:25 +0000 (-0600)
Subject: t/dedupe: avoid div-by-zero for all identical chunks
X-Git-Tag: fio-2.1.14~96
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=15e3ca5b72b03f485abdda06bee9a9458dbd26a5;ds=sidebyside

t/dedupe: avoid div-by-zero for all identical chunks

Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/t/dedupe.c b/t/dedupe.c
index b3ab0f9b..1577a691 100644
--- a/t/dedupe.c
+++ b/t/dedupe.c
@@ -478,8 +478,12 @@ static void show_stat(uint64_t nextents, uint64_t nchunks)
 	double perc, ratio;
 
 	printf("Extents=%lu, Unique extents=%lu\n", (unsigned long) nextents, (unsigned long) nchunks);
-	ratio = (double) nextents / (double) nchunks;
-	printf("De-dupe ratio: 1:%3.2f\n", ratio - 1.0);
+
+	if (nchunks) {
+		ratio = (double) nextents / (double) nchunks;
+		printf("De-dupe ratio: 1:%3.2f\n", ratio - 1.0);
+	} else
+		printf("De-dupe ratio: 1:infinite\n");
 
 	perc = 1.00 - ((double) nchunks / (double) nextents);
 	perc *= 100.0;