diff --git a/user/app1/appl.cc b/user/app1/appl.cc
index 196b800..c1fdd04 100644
--- a/user/app1/appl.cc
+++ b/user/app1/appl.cc
@@ -10,9 +10,15 @@ extern "C" void main() {
 	unsigned id = sys_getpid();
 	char text[] = "testX";
 	text[4] = 0x30+id;
-
+	char buf= 32 ;
 	for (unsigned i = 1;; ++i) {
 		write(1, text, sizeof(text));
+		void* ptr= map(512);
+		
+		//sprintf(&buf, "ptr address: %x \n" , ptr);
+		//unmap(ptr, 512);
+
+
 		//if(i==id){
 		//	//write(2, "kill", 4);
 		//	//write(2, &text[4], 1);