Fix gradient not averaged when parallel training. #1104
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Codecov Report
@@ Coverage Diff @@
## devel #1104 +/- ##
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- Coverage 75.72% 75.71% -0.01%
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Files 88 88
Lines 6998 6997 -1
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- Hits 5299 5298 -1
Misses 1699 1699
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amcadmus
approved these changes
Sep 6, 2021
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The injection of gradient averaging OPs happens at horovod.tensorflow.DistributedOptimizer.compute_gradients.
Before this pull request, each worker trains its own data without synchronization except variables' broadcast at the beginning.
This BUG may explain no acceleration on loss convergence when parallel training.