Gerakan Bawah Tanah - Mr. GBT

We are trying to measure the amount of resources needed to run our program, written in C. Looking here and there, I found getrusage (2). So, yesterday I tried to write a simple code: #include <stdio.h> #include <errno.h> #include <sys/resource.h> int main(){ int y[100][100]; struct rusage *resource; int x; x = getrusage(0, resource); printf("x = %d\n", x); printf("errno = %d\n", errno); return(0); } The result was not great. getrusage returned -1. According to the man page , non zero return value means it fails. The value of errno is 14. What went wrong? Anybody? Is there a better way to measure the amount of resources (memory, CPU, time) needed for a program? [Right now, I am looking at dtrace . Would it help?]