[Prim] Simplify bn vjp #54012
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[Prim] Simplify bn vjp #54012
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xiaoguoguo626807
approved these changes
May 22, 2023
cinn在算子融合的时候x_sub_mean这个变量在多个不同的group的里面由于同时引用，会生成多次缓存，通过recompute，可以优化显存使用，实测resnet50速度也有提升 |
bukejiyu
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to bukejiyu/Paddle
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May 22, 2023
* recompute bn grad * fix test case --------- Co-authored-by: sunli <466530738@qq.com>
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PR types
Performance optimization
PR changes
Others
Description
Pcard-66975
Merge pr #53673.
To recompute part of batch_norm's vjp rule, in order to improve performance of CINN by enhancing op fusion.