Fix bn performance degradation #50287
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AnnaTrainingG
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Feb 7, 2023
zkh2016
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Feb 9, 2023
* fix bn performance degradation
lanxianghit
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修复 #48563 导致ResNet50训练性能下降问题。
4维的输入全部走了自定义kernel，在shape不大的时候走cudnn会比较快，因此添加shape大小判断，达到阈值才走自定义kernel。