fix: Optimize autograd backward tensor lifetime#149
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Chamberlain0w0 wants to merge 1 commit intomasterfrom
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fix: Optimize autograd backward tensor lifetime#149Chamberlain0w0 wants to merge 1 commit intomasterfrom
Chamberlain0w0 wants to merge 1 commit intomasterfrom
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优化 autograd backward 流程中对于 leaf 参数梯度的释放时机，降低训练过程的峰值显存占用。
设计文档详见：https://gxtctab8no8.feishu.cn/wiki/SJBKwmoCRiRQpAkAygmcXt0UnCd?from=from_copylink