diff --git a/safeChan/safeChan.go b/safeChan/safeChan.go
index d9dc645..b314e04 100644
--- a/safeChan/safeChan.go
+++ b/safeChan/safeChan.go
@@ -15,6 +15,7 @@ type SafeChan[T any] struct {
 	once   sync.Once
 }
 
+// size为0会创建无缓冲队列，读chan时，没有数据会阻塞到有数据可读
 func NewSafeChan[T any](size int) *SafeChan[T] {
 	ch := &SafeChan[T]{}
 	ch.ctx, ch.cancel = context.WithCancel(context.Background())
@@ -40,6 +41,7 @@ func (s *SafeChan[T]) Size() int {
 }
 
 func (s *SafeChan[T]) Reader() <-chan T {
+	//log.Debug("reader channel")
 	return s.ch
 }
 
diff --git a/service/baseService.go b/service/baseService.go
index 842195b..f0c2399 100644
--- a/service/baseService.go
+++ b/service/baseService.go
@@ -57,6 +57,7 @@ func (s *BaseService) Write(msg []byte) error {
 	return s.msg.Write(msg)
 }
 
+// 执行一次回调
 func (s *BaseService) RunOnce(cb func()) {
 	select {
 	case <-s.readyStop.Done():
@@ -67,6 +68,7 @@ func (s *BaseService) RunOnce(cb func()) {
 	}
 }
 
+// 执行一次回调并等待返回值
 func (s *BaseService) RunWait(cb func() (retValue any)) (retValue any, err error) {
 	select {
 	case <-s.readyStop.Done():
@@ -113,7 +115,7 @@ func (s *BaseService) WaitStop() {
 
 func (s *BaseService) NotifyStop() {
 	s.readyStopFunc()
-	// log.Debug(fmt.Sprintf("notify %v service readyStop", s.name))
+	//log.Debug(s.Log("notify %v service readyStop", s.name))
 }
 
 //func (s *BaseService) allChanEmpty() bool {
@@ -126,8 +128,10 @@ func (s *BaseService) NotifyStop() {
 func (s *BaseService) canStop() bool {
 	select {
 	case <-s.readyStop.Done():
+		//log.Error(s.Log("want readyStop"))
 		return true
 	default:
+		//log.Error(s.Log("can not Stop"))
 		return false
 	}
 }
@@ -135,6 +139,7 @@ func (s *BaseService) canStop() bool {
 func (s *BaseService) run() {
 	for {
 		if s.onFunc.CanStop() && s.canStop() {
+			//log.Error(s.Log("stop service"))
 			s.msg.Close()
 			s.job.Close()
 			s.Timer.CancelAllTimer()
@@ -144,19 +149,26 @@ func (s *BaseService) run() {
 			s.waitStopFunc()
 			break
 		}
+		// select无default会阻塞在case的chan中直到有可读chan
 		select {
 		case msg, ok := <-s.msg.Reader():
+			//log.Debug(s.Log("msg reader"))
 			if ok {
 				_ = s.onFunc.OnMessage(msg)
 			}
 		case cb, ok := <-s.job.Reader():
+			//log.Debug(s.Log("job reader"))
 			if ok && cb != nil {
 				cb()
 			}
 		case t, ok := <-s.Timer.Reader():
+			//log.Debug(s.Log("timer reader"))
 			if ok && t != nil && t.Func != nil {
 				t.Func()
 			}
+		default:
+			// 休眠50微秒，避免cpu占用过高
+			time.Sleep(50 * time.Microsecond)
 		}
 	}
 }