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[Cherry-pick ] to Release/2.3, Add prefetch_factor in dataloader #43674

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merged 4 commits into from
Jun 21, 2022

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Jackwaterveg
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在 DataLoader 中增加了 prefetch_factor 参数,允许 Dataloader 预加载一定数量的 batch,避免 io 阻塞。
prefeatch_num=2, num_workers=0 的实验结果:
image

prefeatch_num=1001, num_workers=0 的实验结果:
image

可以发现:设置了 prefeatch_num 后,训练出现卡顿的情况大量减少了

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@TCChenlong TCChenlong left a comment

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LGTM

@ZeyuChen ZeyuChen merged commit af415bc into PaddlePaddle:release/2.3 Jun 21, 2022
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4 participants