Deep neural network (DNN) has emerged as the most important and popular artificial intelligent (AI) technique. The growth of model size poses a key energy efficiency challenge for the underlying computing platform. Thus, model compression becomes a crucial problem. However, the current approaches are limited by various drawbacks. Specifically, network sparsification approach suffers from irregularity, heuristic nature and large indexing overhead. On the other hand, the recent structured matrix-based approach (i.e., CirCNN) is limited by the relatively complex arithmetic computation (i.e., FFT), less flexible compression ratio, and its inability to fully utilize input sparsity. To address these drawbacks, this paper proposes PermDNN, a novel approach to generate and execute hardware-friendly structured sparse DNN models using permuted diagonal matrices. Compared with unstructured sparsification approach, PermDNN eliminates the drawbacks of indexing overhead, non-heuristic compression effects and time-consuming retraining. Compared with circulant structure-imposing approach, PermDNN enjoys the benefits of higher reduction in computational complexity, flexible compression ratio, simple arithmetic computation and full utilization of input sparsity. We propose PermDNN architecture, a multi-processing element (PE) fully-connected (FC) layer-Targeted computing engine. The entire architecture is highly scalable and flexible, and hence it can support the needs of different applications with different model configurations. We implement a 32-PE design using CMOS 28nm technology. Compared with EIE, PermDNN achieves 3.3x~4.8x higher throughout, 5.9x~8.5x better area efficiency and 2.8x~4.0x better energy efficiency on different workloads. Compared with CirCNN, PermDNN achieves 11.51x higher throughput and 3.89x better energy efficiency.
|Original language||English (US)|
|Title of host publication||Proceedings - 51st Annual IEEE/ACM International Symposium on Microarchitecture, MICRO 2018|
|Publisher||IEEE Computer Society|
|Number of pages||14|
|State||Published - Dec 12 2018|
|Event||51st Annual IEEE/ACM International Symposium on Microarchitecture, MICRO 2018 - Fukuoka, Japan|
Duration: Oct 20 2018 → Oct 24 2018
|Name||Proceedings of the Annual International Symposium on Microarchitecture, MICRO|
|Other||51st Annual IEEE/ACM International Symposium on Microarchitecture, MICRO 2018|
|Period||10/20/18 → 10/24/18|
Bibliographical noteFunding Information:
The authors would like to appreciate anonymous reviewers’ valuable comments and suggestions. This work is funded by the National Science Foundation Awards CCF-1815699, CCF-1814759, CNS-1717984 and CCF-1750656.
- Deep Learning
- Mold compression