训练VIT_base模型的warning.

[congjianting]

@yutaocui

崔老师, 你好,

训练vit-base的模型报了如下一个warnnning, 麻烦您有空的时候看看是什么原因导致的?

[W reducer.cpp:347] Warning: Grad strides do not match bucket view strides. This may indicate grad was not created according to the gradient layout contract, or that the param's strides changed since DDP was constructed. This is not an error, but may impair performance.
grad.sizes() = [1, 48, 1, 1], strides() = [48, 1, 48, 48]
bucket_view.sizes() = [1, 48, 1, 1], strides() = [48, 1, 1, 1] (function operator())