diff --git a/skynet-src/malloc_hook.c b/skynet-src/malloc_hook.c
index 61c07392..9b3949a6 100644
--- a/skynet-src/malloc_hook.c
+++ b/skynet-src/malloc_hook.c
@@ -106,7 +106,7 @@ mallctl_int64(const char* name, size_t* newval) {
 	} else {
 		je_mallctl(name, &v, &len, NULL, 0);
 	}
-	// printf("name: %s, value: %zd\n", name, v);
+	// skynet_error(NULL, "name: %s, value: %zd\n", name, v);
 	return v;
 }
 
@@ -117,9 +117,9 @@ mallctl_opt(const char* name, int* newval) {
 	if(newval) {
 		int ret = je_mallctl(name, &v, &len, newval, sizeof(int));
 		if(ret == 0) {
-			printf("set new value(%d) for (%s) succeed\n", *newval, name);
+			skynet_error(NULL, "set new value(%d) for (%s) succeed\n", *newval, name);
 		} else {
-			printf("set new value(%d) for (%s) failed: error -> %d\n", *newval, name, ret);
+			skynet_error(NULL, "set new value(%d) for (%s) failed: error -> %d\n", *newval, name, ret);
 		}
 	} else {
 		je_mallctl(name, &v, &len, NULL, 0);
@@ -196,15 +196,15 @@ void
 dump_c_mem() {
 	int i;
 	size_t total = 0;
-	printf("dump all service mem:\n");
+	skynet_error(NULL, "dump all service mem:");
 	for(i=0; i<SLOT_SIZE; i++) {
 		mem_data* data = &mem_stats[i];
 		if(data->handle != 0 && data->allocated != 0) {
 			total += data->allocated;
-			printf("0x%x -> %zdkb\n", data->handle, data->allocated >> 10);
+			skynet_error(NULL, "0x%x -> %zdkb", data->handle, data->allocated >> 10);
 		}
 	}
-	printf("+total: %zdkb\n",total >> 10);
+	skynet_error(NULL, "+total: %zdkb",total >> 10);
 }
 
 char *