From 39d20ad4b677495fb33596a701c65e71ffe38af2 Mon Sep 17 00:00:00 2001
From: Zeyu <xiazeyu@users.noreply.github.com>
Date: Wed, 13 Jul 2022 21:31:54 +0800
Subject: [PATCH] fixed "None type has no len()"

---
 deepspeed/utils/timer.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/deepspeed/utils/timer.py b/deepspeed/utils/timer.py
index 19671add031f..9c98dc930d9e 100755
--- a/deepspeed/utils/timer.py
+++ b/deepspeed/utils/timer.py
@@ -88,6 +88,7 @@ def elapsed(self, reset=True):
             return elapsed_
 
         def mean(self):
+            self.elapsed(reset=False)
             return trim_mean(self.elapsed_records, 0.1)
 
     def __init__(self):