diff --git a/src/aios_kernel/compute_node.py b/src/aios_kernel/compute_node.py
index 0e05ed9..7ce7292 100644
--- a/src/aios_kernel/compute_node.py
+++ b/src/aios_kernel/compute_node.py
@@ -35,6 +35,7 @@ class ComputeNode(ABC):
     def is_local(self) -> bool:
         pass
 
+    # the hit weight when select this node in schedule
     def weight(self) -> int:
         return 1