cacheSize.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55

#include <stdio.h>
#include "inlineasm.h"
#include <stdlib.h>

#define MEASURE_METHOD doMeasure
#define RUNS 10000
#define MIN_OFFSET 1
#define MAX_OFFSET (32*4069)
#define OFFSETS (MAX_OFFSET - MIN_OFFSET)
#define FIELD_TYPE uint8_t

uint64_t doMeasure(FIELD_TYPE *addr){
    uint64_t volatile time = 0;
    
    FIELD_TYPE value = (FIELD_TYPE) &addr;

    time = rdtsc();
    *addr = value;
    time = rdtsc() - time;

    return time;
}

void measure(int offset,FIELD_TYPE *field){
    FIELD_TYPE *lowerAddress =  field + offset;
    *lowerAddress = 0;
	int i;

    for(i=MIN_OFFSET;i <= MAX_OFFSET;i += 32){
        uint64_t time = MEASURE_METHOD(lowerAddress+i);
		if(time > 500)
        fprintf(stdout,"%d %ld \r\n",i,time);
    }
}


int main(int argc, char* argv[]) {

    //uint64_t *results = malloc(sizeof(uint64_t)*RUNS*OFFSETS);
    FIELD_TYPE *field = malloc(sizeof(FIELD_TYPE)*(MAX_OFFSET+1));


    int i=0;

    //for(i=0;i < RUNS;i++){
	//fprintf(stdout,"RUN: %d \r\n",i);
    //}


    measure(0,field);

    return 0;
}