/* 
	Adjust BUFLEN to match the cache size of your CPU.	
	
	Program to check for scheduling problems on SMP systems.
	
	If there's a speedup on UP the kernel moving the process
	across CPU's is causing a significant number of cache reloads
*/
	
#include <stdlib.h>
#include <time.h>
#define NITER 100000
#define BUFLEN (128*1024)   	/* 128k (size of Celeron Cache) */
int p[BUFLEN/sizeof(int)];	/*Hopefully gcc aligns this for us */ 
void main()
{
time_t t,t1;	
	int i;
	while(1) {
		time(&t);	
		for(i = 0; i < NITER; i++)
			memset(p,i++,BUFLEN);
		time(&t1);
		t1 -= t;
		printf("%d seconds for %d iterations\n",t1,NITER);
	}
}