Don't Use Large Mini-batches, Use Local SGDDownload PDF

Sep 25, 2019 (edited Feb 10, 2022)ICLR 2020 Conference Blind SubmissionReaders: Everyone
  • Original Pdf: pdf
  • Code: [![github](/images/github_icon.svg) epfml/LocalSGD-Code]( + [![Papers with Code](/images/pwc_icon.svg) 1 community implementation](
  • Data: [CIFAR-10](, [CIFAR-100](, [ImageNet](
  • Abstract: Mini-batch stochastic gradient methods (SGD) are state of the art for distributed training of deep neural networks. Drastic increases in the mini-batch sizes have lead to key efficiency and scalability gains in recent years. However, progress faces a major roadblock, as models trained with large batches often do not generalize well, i.e. they do not show good accuracy on new data. As a remedy, we propose a \emph{post-local} SGD and show that it significantly improves the generalization performance compared to large-batch training on standard benchmarks while enjoying the same efficiency (time-to-accuracy) and scalability. We further provide an extensive study of the communication efficiency vs. performance trade-offs associated with a host of \emph{local SGD} variants.
18 Replies