Remove DataParallel.scale_loss & apply_collective_grads #27603
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chenwhql
requested review from
MRXLT and
danleifeng
and removed request for
MRXLT
phlrain
previously approved these changes
Sep 28, 2020
chenwhql
dismissed stale reviews from saxon-zh, phlrain, and danleifeng
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phlrain
approved these changes
Sep 29, 2020
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PR types
New features
PR changes
APIs
Describe
In order to simplify the writing of dynamic parallel training, remove
DataParallel.scale_loss & apply_collective_grads.DataParallel.scale_losss->loss.backward()DataParallel.apply_collective_grads->optimizer.step/minimizeTODO:
scale_losssandapply_collective_gradsinto C++ for better preformance (in the future, now only for API stability of 2.0-RC)