Efficient Scaling of Dynamic Graph Neural Networks

• URL: http://arxiv.org/abs/2109.07893v1
• Date: Thu, 16 Sep 2021 11:51:20 GMT
• Title: Efficient Scaling of Dynamic Graph Neural Networks
• Authors: Venkatesan T. Chakaravarthy, Shivmaran S. Pandian, Saurabh Raje, Yogish Sabharwal, Toyotaro Suzumura, Shashanka Ubaru
• Abstract summary: This is the first scaling study on dynamic Graph Neural Networks. We devise mechanisms for reducing the GPU memory usage. We design a graph difference-based strategy to significantly reduce the transfer time.
• Score: 7.313571385612325
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: We present distributed algorithms for training dynamic Graph Neural Networks (GNN) on large scale graphs spanning multi-node, multi-GPU systems. To the best of our knowledge, this is the first scaling study on dynamic GNN. We devise mechanisms for reducing the GPU memory usage and identify two execution time bottlenecks: CPU-GPU data transfer; and communication volume. Exploiting properties of dynamic graphs, we design a graph difference-based strategy to significantly reduce the transfer time. We develop a simple, but effective data distribution technique under which the communication volume remains fixed and linear in the input size, for any number of GPUs. Our experiments using billion-size graphs on a system of 128 GPUs shows that: (i) the distribution scheme achieves up to 30x speedup on 128 GPUs; (ii) the graph-difference technique reduces the transfer time by a factor of up to 4.1x and the overall execution time by up to 40%

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