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An Efficient Mapping Approach to Large-Scale DNNs on Multi-FPGA Architectures

FPGAs are very attractive to accelerate the deep neural networks (DNNs). While single FPGA can provide good performance for small-scale DNNs, support for large-scale DNNs is limited due to higher resource demand. In this paper, we propose an efficient mapping approach for accelerating large-scale DNNs on asymmetric multi-FPGA architectures. In this approach, the neural network mapping can be formulated as a resource allocation problem. We design a dynamic programming-based partitioning to solve this problem optimally. Experimental results using the large-scale ResNet-152 demonstrate that our approach deploys sixteen FPGAs to provide an advantage of 16.4x GOPS over the state-of-the-art work.