trying to find number of caches on a machine

Applications Programming
1

I am trying to find the number of caches on a machine programatically.

#include <stdio.h>
#include <malloc.h>

int main(void)
{
int *ptr,*ptr1,i,j;
j=0;
i=1;
printf("Changing allocation with brk()\n");
while(1)
{

    for\(j=0;j&lt;i;j\+\+\)
    \{
	    ptr = \(int *\) malloc\(i\);
	    ptr[j] = j;
    	printf\("VALUE %d is:: %lu\\n",j,ptr[j]\);
    	brk\(ptr\+i\);
    	ptr1=\(ptr\+j\);
		printf\(" VALUE of trace end is::%lu\\n",ptr1\);
		i\+\+;
	\}
\}
return 0;

}

I was thinking of embedding time in such a way that I could track access to a particular growing memory size. The moment the access time varied, the cache level was changed. Am I thinking along the right lines, please guide me.

2

Interesting idea but your code seems to be too complicated for me.
Try to alloc memory once (e.g. 10MB)
and perform timing of 'mangling' areas of growing size:
256kB, 512kB, and so on.
Mangling can be as simple as mem[i]++

Regards