프로세스당 메모리 사용량을 정확하게 알수 있는 방법?

특히 메모리 사용량은 아무리 많이 호출해도 0으로 나옵니다.
http://kldp.org/comment/reply/19857/39728

#include
#include

int main(int argc, char *argv[])
{
struct mallinfo mem_info;
char *temp;
int i;

if ( argc != 2 )
return 0;

temp = (char*)malloc(atoi(argv[1]));
memset(temp, 0, atoi(argv[1]));
mem_info = mallinfo();

printf("(%d) This is the total size of memory allocated with sbrk by malloc, in bytes.\n", mem_info.arena);
printf("(%d) This is the number of chunks not in use.\n", mem_info.ordblks);
printf("(%d) This field is unused.\n", mem_info.smblks);
printf("(%d) This is the total number of chunks allocated with mmap.\n", mem_info.hblks);
printf("(%d) This is the total size of memory allocated with mmap, in bytes.\n", mem_info.hblkhd);
printf("(%d) This field is unused.\n", mem_info.usmblks);
printf("(%d) This field is unused.\n", mem_info.fsmblks);
printf("(%d) This is the total size of memory occupied by chunks handed out by malloc.\n", mem_info.uordblks);
printf("(%d) This is the total size of memory occupied by free (not in use) chunks.\n", mem_info.fordblks);
printf("(%d) This is the size of the top-most releasable chunk that normally borders the end of the heap.\n", mem_info.keepcost);

return 0;
}

정확한 답은 아니지만 동적인 메모리 현황을 아는 방법은 위와 같이 하면 됩니다..
걍.. 참고하시라는 의미로^^