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[PHI] Fix paddle.interpolate for big tensor by lshpku · Pull Request #73153 · PaddlePaddle/Paddle · GitHub
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[PHI] Fix paddle.interpolate for big tensor #73153
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Merged
wanghuancoder
merged 1 commit into
PaddlePaddle:develop
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lshpku:fix-interpolate-kernel-api
Jun 9, 2025
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[PHI] Fix paddle.interpolate for big tensor #73153
wanghuancoder
merged 1 commit into
PaddlePaddle:develop
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lshpku:fix-interpolate-kernel-api
Jun 9, 2025
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你的PR提交成功,感谢你对开源项目的贡献! |
wanghuancoder
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LGTM
shanjiang7
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Jun 12, 2025
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PR Category
Operator Mechanism
PR Types
Bug fixes
Description
修复
paddle.interpolate
的大Tensor问题这个API涉及变种较多,包括以下Host和CUDA函数:
修改口径:这次我换了一种修改方式,以前是把int转成int64_t,但是我最近写一些Kernel的时候发现这样并不是最好的,因为CUDA里面很多原生变量其实是无符号数,包括threadIdx、blockDim等,另外指针运算也是无符号运算,转成int64_t反而会增加符号转换的成本,因此我这次统一修改为size_t。当然,我谨慎评估了变量的取值范围,确实一些数可能有出现负数的情况(比如访问前一个pixel),这种情况我就还是用int64_t。
性能变化:几乎无变化,性能损失<1%,甚至还有变快的情况,因为原来的Kernel里本来就是int和size_t混用的,我统一成size_t不仅不会增加太多计算量,还节省了符号位转换的成本,所以可能更快。
正确性验证:在80G卡上验证了interpolate的400多个config,但是居然有些爆显存的情况,除此之外都通过。
Pcard-85711