test.c

#include <stdio.h>
#include <fcntl.h>
#include <sys/time.h>

#include <lkl.h>
#include <lkl_host.h>


int main(int argc, char **argv)
{
	struct timeval b, a;
	int n, fd, ret, count = 1000000;
	double elapsed;


	printf("setup lkl\n");
	ret = lkl_start_kernel(&lkl_host_ops, "mem=100M");

	ret = lkl_sys_mknod("/dev_null", LKL_S_IFCHR | 0600, LKL_MKDEV(1, 3));
	if (ret < 0) {
		printf("lkl_sys_mknod failed: %d\n", ret);
		return -1;
	}



	char *host_target = "/dev/null";
	char *lkl_target = "/dev_null";

	printf("\n");

	printf("test host kernel\n");
	gettimeofday(&b, NULL);
	for (n = 0; n < count; n++) {
		fd = open(host_target, 0, 0);
		if (fd < 0) {
			printf("open failed at count %d: %d\n", n, fd);
			break;
		}
		close(fd);
	}
	gettimeofday(&a, NULL);

	elapsed = a.tv_sec * 1000000 + a.tv_usec;
	elapsed -= b.tv_sec * 1000000 + b.tv_usec;
	printf("%d open()/close(): %lf second\n", count, elapsed / 1000000);
	


	printf("test lkl\n");
	gettimeofday(&b, NULL);
	for (n = 0; n < count; n++) {
		fd = lkl_sys_open(lkl_target, 0, 0);
		if (fd < 0) {
			printf("open failed at count %d: %d\n", n, fd);
			break;
		}
		lkl_sys_close(fd);
	}
	gettimeofday(&a, NULL);

	elapsed = a.tv_sec * 1000000 + a.tv_usec;
	elapsed -= b.tv_sec * 1000000 + b.tv_usec;
	printf("%d open()/close(): %lf second\n", count, elapsed / 1000000);


	return 0;
}