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temporarily fix advanced-setitem grad error #57737

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merged 1 commit into from
Sep 26, 2023

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zoooo0820
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Pcard-66985

#57023 中,由于动态图下stride机制的支持,针对高级索引赋值的场景,移除了一次多余的set_value OP操作。即流程由 基础索引get -> index_put获取高级索引赋值结果 -> set_value回写 变为 基础索引get到原tensor的view -> index_put_在view上执行inplace赋值

上述修改在目前的动态图反向机制上存在一定问题,反向只以被赋值节点作为出发点,这导致index_put_等操作只完成了前向过程中修改值的功能,但并未参与到反向,导致部分模型无法收敛。经讨论,这个问题需要在 #57628 中修复,但由于涉及整体反向机制,需要一些时间。

因此这个PR将高级索引赋值改回此前的流程,执行一次额外的set_value赋值,保证前序操作均在反向流程中。当上述机制问题修复后再移除

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paddle-bot bot commented Sep 26, 2023

你的PR提交成功,感谢你对开源项目的贡献!
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@zhwesky2010 zhwesky2010 merged commit 8abb036 into PaddlePaddle:develop Sep 26, 2023
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@zoooo0820 zoooo0820 deleted the add_extra_set_value branch September 26, 2023 08:25
Frida-a pushed a commit to Frida-a/Paddle that referenced this pull request Oct 14, 2023
jiahy0825 pushed a commit to jiahy0825/Paddle that referenced this pull request Oct 16, 2023
danleifeng pushed a commit to danleifeng/Paddle that referenced this pull request Nov 14, 2023
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2 participants