Ajay Mohan / Rasperf

Authored by Sathya Narayanan 2016-02-23 00:07:37 -0800

Exists in master

Showing 1 changed file with 45 additions and 0 deletions Inline Diff

File was created	1	#include<stdio.h>
	2	#include <sys/time.h>
	3	#include <stdlib.h>
	4
	5	#define KB 1024
	6	#define MB 1024 * KB
	7	#define MAX_ARRAY_SIZE 32*MB
	8	#define STRIDE_SIZE 16
	9	#define CPU_FREQ 900
	10
	11	typedef unsigned long long int u64;
	12
	13	u64 access_time_1(u64 size, int stride_size){
	14	struct timeval start, end;
	15	struct timezone tz;
	16
	17	int array = (int )malloc(size);
	18	int len = (size)/sizeof(int);
	19	unsigned int i;
	20
	21	gettimeofday(&start, &tz);
	22	for(i=0; i < MAX_ARRAY_SIZE; i++) {
	23	array[( i * stride_size) % len]++;
	24	}
	25	gettimeofday(&end, &tz);
	26
	27	free(array);
	28	return ((end.tv_sec * 1e6) + end.tv_usec - (start.tv_sec * 1e6) - start.tv_usec);
	29	}
	30
	31	int main()
	32	{
	33	int i, j;
	34
	35	for (j = 4; j <= 32; j*=2) {
	36	printf("Stride size: %u\n", j);
	37	for (i = 1024; i <= 32 * MB; i*=2) {