diff --git a/python/jittor/lock.py b/python/jittor/lock.py
index 53c30cc2..99dccac5 100644
--- a/python/jittor/lock.py
+++ b/python/jittor/lock.py
@@ -5,15 +5,15 @@ from jittor_utils import cache_path
 class Lock:   
     def __init__(self, filename):  
         self.handle = open(filename, 'w') 
-        print(f'创建锁 {filename}') 
+        print(f'创建锁 {filename} PID {os.getpid()}') 
       
     def lock(self):  
         ret = fcntl.flock(self.handle, fcntl.LOCK_EX)
-        print(f'加锁成功 {ret}')
+        print(f'加锁成功 {ret} PID {os.getpid()}')
         
     def unlock(self):  
         ret = fcntl.flock(self.handle, fcntl.LOCK_UN)  
-        print(f'释放锁成功 {ret}')
+        print(f'释放锁成功 {ret} PID {os.getpid()}')
           
     def __del__(self):  
         self.handle.close()