diff --git a/kernel/server/port.go b/kernel/server/port.go
index 0ae6080ff..50e5fde95 100644
--- a/kernel/server/port.go
+++ b/kernel/server/port.go
@@ -35,6 +35,9 @@ import (
 func killRunningKernel() {
 	defer logging.Recover()
 
+	now := time.Now()
+	defer logging.LogInfof("check running kernel elapsed [%dms]", time.Since(now).Milliseconds())
+
 	processes, err := goPS.Processes()
 	if nil != err {
 		logging.LogErrorf("get processes failed: %s", err)
diff --git a/kernel/server/serve.go b/kernel/server/serve.go
index 0ac7ab2f6..9ae50b915 100644
--- a/kernel/server/serve.go
+++ b/kernel/server/serve.go
@@ -85,6 +85,7 @@ func Serve(fastMode bool) {
 		host = "127.0.0.1"
 	}
 
+	now := time.Now()
 	ln, err := net.Listen("tcp", host+":"+util.ServerPort)
 	if nil != err {
 		if !fastMode {
@@ -104,6 +105,7 @@ func Serve(fastMode bool) {
 		}
 	}
 	util.ServerPort = port
+	logging.LogInfof("listen port elapsed [%dms]", time.Since(now).Milliseconds())
 
 	pid := fmt.Sprintf("%d", os.Getpid())
 	if !fastMode {