PENNI: Pruned Kernel Sharing for Efficient CNN Inference

• URL: http://arxiv.org/abs/2005.07133v2
• Date: Thu, 25 Jun 2020 02:28:00 GMT
• Title: PENNI: Pruned Kernel Sharing for Efficient CNN Inference
• Authors: Shiyu Li, Edward Hanson, Hai Li, Yiran Chen
• Abstract summary: State-of-the-art (SOTA) CNNs achieve outstanding performance on various tasks. Their high computation demand and massive number of parameters make it difficult to deploy these SOTA CNNs onto resource-constrained devices. We propose PENNI, a CNN model compression framework that is able to achieve model compactness and hardware efficiency simultaneously.
• Score: 41.050335599000036
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Although state-of-the-art (SOTA) CNNs achieve outstanding performance on various tasks, their high computation demand and massive number of parameters make it difficult to deploy these SOTA CNNs onto resource-constrained devices. Previous works on CNN acceleration utilize low-rank approximation of the original convolution layers to reduce computation cost. However, these methods are very difficult to conduct upon sparse models, which limits execution speedup since redundancies within the CNN model are not fully exploited. We argue that kernel granularity decomposition can be conducted with low-rank assumption while exploiting the redundancy within the remaining compact coefficients. Based on this observation, we propose PENNI, a CNN model compression framework that is able to achieve model compactness and hardware efficiency simultaneously by (1) implementing kernel sharing in convolution layers via a small number of basis kernels and (2) alternately adjusting bases and coefficients with sparse constraints. Experiments show that we can prune 97% parameters and 92% FLOPs on ResNet18 CIFAR10 with no accuracy loss, and achieve 44% reduction in run-time memory consumption and a 53% reduction in inference latency.

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