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surrogate = surrogate * (trainer.distributed_factor / 8.) #4

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kinglai opened this issue Nov 8, 2021 · 1 comment
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surrogate = surrogate * (trainer.distributed_factor / 8.) #4

kinglai opened this issue Nov 8, 2021 · 1 comment

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@kinglai
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kinglai commented Nov 8, 2021

is 8 just a parameter or has some exact mining? eg, 8 GPUs?
@luyug
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luyug commented Nov 11, 2021

8 is a constant factor that corresponds to the number of GPU used in training DPR in the original paper. This scaling here offset the effect of gradient mean allreduce, thereby aligning the gradient value with the original setup.

@luyug luyug closed this as completed Nov 16, 2021
@luyug luyug mentioned this issue Apr 26, 2022
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@kinglai @luyug