Massively Distributed SGD: ImageNet/ResNet-50 Training in a Flash

Scaling the distributed deep learning to a massive GPU cluster level is challenging due to the instability of the large mini-batch training and the overhead of the gradient synchronization. We address the instability of the large mini-batch training with batch-size control and label smoothing. We ad...

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Hauptverfasser: Mikami, Hiroaki, Suganuma, Hisahiro, U-chupala, Pongsakorn, Tanaka, Yoshiki, Kageyama, Yuichi
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creator Mikami, Hiroaki
Suganuma, Hisahiro
U-chupala, Pongsakorn
Tanaka, Yoshiki
Kageyama, Yuichi
description Scaling the distributed deep learning to a massive GPU cluster level is challenging due to the instability of the large mini-batch training and the overhead of the gradient synchronization. We address the instability of the large mini-batch training with batch-size control and label smoothing. We address the overhead of the gradient synchronization with 2D-Torus all-reduce. Specifically, 2D-Torus all-reduce arranges GPUs in a logical 2D grid and performs a series of collective operation in different orientations. These two techniques are implemented with Neural Network Libraries (NNL). We have successfully trained ImageNet/ResNet-50 in 122 seconds without significant accuracy loss on ABCI cluster.
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title Massively Distributed SGD: ImageNet/ResNet-50 Training in a Flash
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