thp_tester.c

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

int main() {
        int *memory_area1 = malloc(819200000);
        int *memory_area2 = malloc(819200000);
        int *memory_area3 = malloc(819200000);
        int *p;

        int i, j = 0;
        for (i = 0; i < 200000; i++) {
                /* write per 4kB, 1024*4byte */
                memory_area1[j] = 1;
                j += 1024;
        }
        j = 0;
        printf("First 800MB allocated\n");
        sleep(10);

        for (i = 0; i < 200000; i++) {
                memory_area2[j] = 1;
                j += 1024;
        }
        j = 0;
        printf("Second 800MB allocated\n");
        sleep(10);

        for (i = 0; i < 200000; i++) {
                memory_area3[j] = 1;
                j += 1024;
        }
        printf("Third 800MB allocated\n");

        sleep(15);
        printf("Start to flush third area is flushing .. \n");
        free(memory_area3);
        printf("Flush is completed\n");
        printf("Start to read first area\n");
        sleep(15);
        for (i = 0; i < 204800000; i++) {
                *p = *memory_area1;
                memory_area1++;
        }
        printf("Read is completed\n");

        getchar();
        return 0;
}