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Initial release, used to benchmark fastmemcpy.h code from libvo. 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@563 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
atmosfear 2001-04-21 18:19:12 +00:00
parent d73d923d05
commit a2c7d931db
1 changed files with 37 additions and 0 deletions
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TOOLS/fastmemcpybench.c Normal file
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/*
fastmemcpybench.c used to benchmark fastmemcpy.h code from libvo.
Note: this code can not be used on PentMMX-PII because they contain
a bug in rdtsc. For Intel processors since P6(PII) rdpmc should be used
instead. For PIII it's disputable and seems bug was fixed but I don't
tested it.
*/
#include <stdio.h>
#include "../libvo/fastmemcpy.h"
#define ARR_SIZE 100000
//#define ARR_SIZE 1000000
static inline unsigned long long int read_tsc( void )
{
unsigned long long int retval;
__asm __volatile ("rdtsc":"=A"(retval)::"memory");
return retval;
}
unsigned char arr1[ARR_SIZE],arr2[ARR_SIZE];
int main( void )
{
unsigned long long int v1,v2;
unsigned char * marr1,*marr2;
marr1 = &arr1[1];
marr2 = &arr2[3];
v1 = read_tsc();
memcpy(marr1,marr2,ARR_SIZE-4);
v2 = read_tsc();
printf("v1 = %llu v2 = %llu v2-v1=%llu\n",v1,v2,v2-v1);
return 0;
}