プロセッサ研究チーム

研究概要

主な研究成果

問題特化型高性能計算機アーキテクチャ研究プラットフォーム

半導体微細化による電力効率向上が困難となる中、問題特化型の計算機アーキテクチャが注目されています。そのために、FPGAクラスタESSPER (Elastic and Scalable System for High-Performance Reconfigurable Computing)を開発しました。また、パケット交換網上に任意のトポロジを構築可能な仮想回線交換網 VCSNを開発しました。

FPGAによる問題特化型計算ハードウェアの設計および実装

主要論文

• Kentaro Sano, Tomohiro Ueno, Fuga Kato, Kazuya Mochizuki, Katsuhiko Ota, Nozomu Matsunaga
  "ESSPER2: Research-Oriented FPGA Cluster for Quantum Error Correction and HPC Applications"
  Proceedings of International Symposium on Highly-Efficient Accelerators and Reconfigurable Technologies (HEART), DOI: 10.1145/3814576.3814590, May 17-19, 2026.
• Chenlin Shi, Boma A. Adhi, Lin Teng, Jiaheng Liu, Shinobu Miwa, Kentaro Sano
  "Towards Unified Acceleration: Weight-Stationary GEMM on HPC-oriented Elastic CGRAs"
  Proceedings of SCA/HPCA'26, DOI:10.1145/3773656.3773663 , 2026.
• Prasoon Ambalathankandy, Werner Florian Samayoa, Jan Erik R. Wichmann, Kentaro Sano
  "Systolic array based syndrome graph pruning for quantum error correction using FPGAs"
  Proceedings of International Symposium on Highly-Efficient Accelerators and Reconfigurable Technologies (HEART), pp.126-130, DOI: 10.1145/3728179.3728184, May 26-28, 2025.
• Tomohiro Ueno, Emanuele Del Sozzo, Kentaro Sano
  "Flexible Systolic Array Platform on Virtual 2-D Multi-FPGA Plane"
  Proceedings of HPC Asia 2024: The International Conference on High Performance Computing in Asia-Pacific Region, pp.84–94, DOI: 10.1145/3635035.3637285, Jan 25–27, 2024.
• Emanuele Del Sozzo, Xinyuan Wang, Boma Adhi, Carlos Cortes, Jason Anderson, Kentaro Sano
  "Exploration of Trade-offs Between General-Purpose and Specialized Processing Elements in HPC-Oriented CGRA"
  Proceedings of IEEE International Parallel & Distributed Processing Symposium (IPDPS), pp.668-680, DOI: 10.1109/IPDPS57955.2024.00065., 2024.
• Emanuele Del Sozzo, Davide Conficconi, Kentaro Sano
  "Across Time and Space: Senju’s Approach for Scaling Iterative Stencil Loop Accelerators on Single and Multiple FPGAs"
  FPT Journal Track with ACM Transactions on Reconfigurable Technology and Systems (TRETS), Vol.17, Issue.2, Article No.28, pp.1-33, DOI: 10.1145/3634920, 2024.
• Kentaro Sano, Atsushi Koshiba, Takaaki Miyajima, and Tomohiro Ueno
  "ESSPER: Elastic and Scalable FPGA-Cluster System for High-Performance Reconfigurable Computing with Supercomputer Fugaku"
  Proceedings of HPC Asia2023, pp.140-150, DOI: 10.1145/3578178.3579341, 2023.
• Tomohiro Ueno and Kentaro Sano
  "VCSN: Virtual Circuit-Switching Network for Flexible and Simple-to-Operate Communication in HPC FPGA Cluster"
  ACM Transactions on Reconfigurable Technology and Systems (TRETS), Vol.16, Issue.2, Article No.25, pp.1-32, DOI: 10.1145/3579848, 2023.
• Boma Adhi, Carlos Cortes, Yiyu Tan, Takuya Kojima, Artur Podobas, and Kentaro Sano
  "The Cost of Flexibility: Embedded versus Discrete Routers in CGRAs for HPC"
  Proceedings of IEEE Cluster Conference (CLUSTER), pp.347-356, DOI: 10.1109/CLUSTER51413.2022.00046, Sep 6-9, 2022.
• Artur Podobas, Kentaro Sano, and Satoshi Matsuoka
  "A Survey on Coarse-Grained Reconfigurable Architectures from a Performance Perspective"
  IEEE Access, Vol.8, pp.146719-146743, DOI:10.1109/ACCESS.2020.3012084, 2020.

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