From d32b2ca15bb2840ccf53d98a7088a3f01f8496a6 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Sun, 30 Aug 2015 20:49:36 +0100
Subject: core: Make geometric mean robust for large number of tests

Since using a multiplication of each test result can quickly exhaust the
floating point range, convert it to a logarithmic addition.
---
 ezbench.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ezbench.sh b/ezbench.sh
index af4a7cf..7bf48e4 100755
--- a/ezbench.sh
+++ b/ezbench.sh
@@ -406,7 +406,7 @@ do
 
     # finish with the geometric mean (when we have multiple tests)
     if [ $t -gt 1 ]; then
-	fpsALL=$(awk '{r = 1; for(i=1; i<=NF; i++) { r *= $i } print exp(log(r) / NF) }' <<< $fpsALL)
+	    fpsALL=$(awk '{r=0; for(i=1; i<=NF; i++) { r += log($i) } print exp(r / NF) }' <<< $fpsALL)
 	if [ -z "${testPrevFps[-1]}" ]; then
 		testPrevFps[-1]=$fpsALL
 	fi
-- 
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