From 2a6e9d9edae6aaf94e643f026cb63774e907cbe6 Mon Sep 17 00:00:00 2001
From: michael <michael@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Thu, 22 Nov 2001 19:22:49 +0000
Subject: newly allocated memory seems to point to only 1 zero filled 4k page
 or something so there is a near 100% cache hit rate ... not very realistic,
 writeing something in the source array fixes that so the benchmark scores are
 meaningfull now

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3077 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 TOOLS/fastmemcpybench.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

(limited to 'TOOLS')

diff --git a/TOOLS/fastmemcpybench.c b/TOOLS/fastmemcpybench.c
index dd153a2b75..adedbb7a57 100644
--- a/TOOLS/fastmemcpybench.c
+++ b/TOOLS/fastmemcpybench.c
@@ -95,7 +95,7 @@ static inline unsigned long long int read_tsc( void )
   return retval;
 }
 
-unsigned char arr1[ARR_SIZE],arr2[ARR_SIZE];
+unsigned char  __attribute__((aligned(4096)))arr1[ARR_SIZE],arr2[ARR_SIZE];
 
 int main( void )
 {
@@ -107,9 +107,12 @@ int main( void )
   mga_init();
   marr1 = &frame[3];
 #else
-  marr1 = &arr1[3];
+  marr1 = &arr1[0];
 #endif
-  marr2 = &arr2[9];
+  marr2 = &arr2[0];
+
+  for(i=0; i<ARR_SIZE; i++) marr1[i] = marr2[i] = i;
+
   t=GetTimer();
   v1 = read_tsc();
   for(i=0;i<100;i++) memcpy(marr1,marr2,ARR_SIZE-16);
-- 
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