test.cpp

/*
 *  Source copied from http://sysmagazine.com/posts/138132.
 */

#include <iostream>
#include <algorithm>
#include <stdlib.h>

const size_t MB   = 1024*1024;
size_t MOD  = 0;

unsigned char uniqueNumber   () {
    static unsigned char number    = 0;
    return ++ number % MOD;
}

int main (int argc , char ** argv) {
    if (argc < 3) {
        return 1 ;
    }
    size_t BLOCK_SIZE  = atoi (argv [1])  * MB;
    MOD = atoi (argv [2]);

    unsigned char* garbage   = (unsigned char  *) malloc (BLOCK_SIZE);

    std:: generate_n (garbage, BLOCK_SIZE, uniqueNumber);
    std:: sort (garbage, garbage + BLOCK_SIZE);

    free (garbage);

    return 0 ;
}