.

t_sysmmap_c.c

@@ -10,7 +10,7 @@
 #include <sys/mman.h>
 
 //		 12345678
-#define	NITER	100000
+#define	NITER	500000
 
 // microtime returns current time as double
 double microtime() {
@@ -33,7 +33,7 @@ int main() {
 	size_t size;
 	double Tstart, Tend;
 
-	fd = open("/dev/shm/y.dat", O_RDWR);
+	fd = open("/dev/shm/y.dat", O_RDWR | O_CREAT | O_TRUNC, 0666);
 	if (fd == -1) {
 		perror("open");
 		abort();
@@ -69,7 +69,7 @@ int main() {
 	}
 	Tend = microtime();
 
-	printf("T(pagefault): %.1f\t(%i)\n", (Tend - Tstart) / NITER, sum);
+	printf("T(pagefault): %.1f ns\t(%i)\n", (Tend - Tstart) * 1E9 / NITER, sum);
 
 	return 0;
 }