NDLI: A Parallel Bandit-Based Approach for Autotuning FPGA Compilation

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OLAF'17: Third International Workshop on Overlay Architectures for FPGAs

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A Parallel Bandit-Based Approach for Autotuning FPGA Compilation

Content Provider	ACM Digital Library
Author	Luo, Guojie Yang, Stephen Zhang, Zhiru Xu, Chang Liu, Gai Zhao, Ritchie
Abstract	Mainstream FPGA CAD tools provide an extensive collection of optimization options that have a significant impact on the quality of the final design. These options together create an enormous and complex design space that cannot effectively be explored by human effort alone. Instead, we propose to search this parameter space using autotuning, which is a popular approach in the compiler optimization domain. Specifically, we study the effectiveness of applying the multi-armed bandit (MAB) technique to automatically tune the options for a complete FPGA compilation flow from RTL to bitstream, including RTL/logic synthesis, technology mapping, placement, and routing. To mitigate the high runtime cost incurred by the complex FPGA implementation process, we devise an efficient parallelization scheme that enables multiple MAB-based autotuners to explore the design space simultaneously. In particular, we propose a dynamic solution space partitioning and resource allocation technique that intelligently allocates computing resources to promising search regions based on the runtime information of search quality from previous iterations. Experiments on academic and commercial FPGA CAD tools demonstrate promising improvements in quality and convergence rate across a variety of real-life designs.
Starting Page	157
Ending Page	166
Page Count	10
File Format	PDF
ISBN	9781450343541
DOI	10.1145/3020078.3021747
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2017-02-22
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Multiarmed bandit Fpga Autotuning Design space exploration
Content Type	Text
Resource Type	Article

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