Update of /cvsroot/mplayer/main/TOOLS In directory mplayer:/var/tmp.root/cvs-serv7865 Modified Files: fastmemcpybench.c Log Message: 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 Index: fastmemcpybench.c =================================================================== RCS file: /cvsroot/mplayer/main/TOOLS/fastmemcpybench.c,v retrieving revision 1.3 retrieving revision 1.4 diff -u -r1.3 -r1.4 --- fastmemcpybench.c 2 May 2001 14:48:35 -0000 1.3 +++ fastmemcpybench.c 22 Nov 2001 19:22:49 -0000 1.4 @@ -95,7 +95,7 @@ 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 @@ 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);