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disable strided split by wanghuancoder · Pull Request #56882 · PaddlePaddle/Paddle · GitHub
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disable strided split #56882
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Merged
wanghuancoder
merged 4 commits into
PaddlePaddle:develop
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wanghuancoder:disable_strided_split
Sep 4, 2023
Merged
disable strided split #56882
wanghuancoder
merged 4 commits into
PaddlePaddle:develop
from
wanghuancoder:disable_strided_split
Sep 4, 2023
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你的PR提交成功，感谢你对开源项目的贡献! |
Xreki
previously approved these changes
Sep 1, 2023
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LGTM
… disable_strided_split
Xreki
approved these changes
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LGTM
BeingGod
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Sep 9, 2023
* disable strided split
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Description
Pcard-71699
框架支持stride后。发现split性能下降。
在split后调用matmul，假如split 3份，且axis不为0，此时前向需要调用3次contiguous，反向也调用3次contiguous。导致模型性能下降。
通过Python手动调用contiguous。可以将contiguous的次数降为3次。但3个contiguous kernel的性能不及1个split的性能。
在V100上，3个contiguous kernel比1个split慢7%。但在A100上慢87%。
#56866 尝试加速contiguous。但发生CUDA700，应该没有写对。即使写对了，新的写法速度不如原有写法。
暂时让split不走stride。