fix loss normalization for ddp training

haoneng.lhn

2023-12-08 acb9a0fec8d8a4dabeedcbb8e08c26f66d7083f0

1
2
3
4
5
6
7
8
9
10
11
12
13    1
14    2
15    3
16    4
17    5
18    6
19    7
20    8
21    9
22    10
23    11
24    12