diff --git a/initial-xv6/tests/test_1.c b/initial-xv6/tests/test_1.c
new file mode 100644
index 0000000..5f67b90
--- /dev/null
+++ b/initial-xv6/tests/test_1.c
@@ -0,0 +1,19 @@
+#include "types.h"
+#include "stat.h"
+#include "user.h"
+
+int
+main(int argc, char *argv[]) {
+  int x1 = getreadcount();
+  int x2 = getreadcount();
+  char buf[100];
+  (void) read(4, buf, 1);
+  int x3 = getreadcount();
+  int i;
+  for (i = 0; i < 1000; i++) {
+    (void) read(4, buf, 1);
+  }
+  int x4 = getreadcount();
+  printf(1, "XV6_TEST_OUTPUT %d %d %d\n", x2-x1, x3-x2, x4-x3);
+  exit();
+}
diff --git a/initial-xv6/tests/test_2.c b/initial-xv6/tests/test_2.c
new file mode 100644
index 0000000..a1baf10
--- /dev/null
+++ b/initial-xv6/tests/test_2.c
@@ -0,0 +1,27 @@
+#include "types.h"
+#include "stat.h"
+#include "user.h"
+
+int
+main(int argc, char *argv[]) {
+    int x1 = getreadcount();
+
+    int rc = fork();
+
+    int total = 0;
+    int i;
+    for (i = 0; i < 100000; i++) {
+	char buf[100];
+	(void) read(4, buf, 1);
+    }
+    // https://wiki.osdev.org/Shutdown
+    // (void) shutdown();
+
+    if (rc > 0) {
+	(void) wait();
+	int x2 = getreadcount();
+	total += (x2 - x1);
+	printf(1, "XV6_TEST_OUTPUT %d\n", total);
+    }
+    exit();
+}