論文

• Yoshiyuki Morie, Yasutaka Wada, Ryohei Kobayashi, Ryuichi Sakamoto. Data Transfer API and its Performance Model for Rank-Level Approximate Computing on HPC Systems, International Journal of Networking and Computing, Vol. 13, No. 1, pp. 48-61, 2023.  公式リンク  
  
• Ryohei Kobayashi, Kento Miura, Norihisa Fujita, Taisuke Boku, Toshiyuki Amagasa. An Open-source FPGA Library for Data Sorting, Journal of Information Processing, Vol. 30, No. 0, pp. 766-777, 2022.  公式リンク  
  
• Ryohei Kobayashi, Norihisa Fujita, Yoshiki Yamaguchi, Taisuke Boku, Kohji Yoshikawa, Makito Abe, Masayuki Umemura. Multi-Hybrid Accelerated Simulation by GPU and FPGA on Radiative Transfer Simulation in Astrophysics, Journal of Information Processing, Vol. 28, No. 0, pp. 1073-1089, 2020.  公式リンク  
  
• Shimpei SATO, Ryohei KOBAYASHI, Kenji KISE. ArchHDL: A Novel Hardware RTL Modeling and High-Speed Simulation Environment, IEICE Transactions on Information and Systems, Vol. E101.D, No. 2, pp. 344-353, Feb. 2018.  公式リンク  
  
• Ryohei KOBAYASHI, Kenji KISE. A High Performance FPGA-Based Sorting Accelerator with a Data Compression Mechanism, IEICE Transactions on Information and Systems, Vol. E100.D, No. 5, pp. 1003-1015, May 2017.  公式リンク  
  
• 小林 諒平, 吉瀬 謙二. 多数の小容量FPGAを用いたスケーラブルなステンシル計算機, 情報処理学会論文誌コンピューティングシステム, Vol. 6, No. 4, pp. 1-13, Oct. 2013.

国際会議発表 (査読有り)

• Norihisa Fujita, Beau Johnston, Narasinga Rao Miniskar, Ryohei Kobayashi, Mohammad Alaul Haque Monil, Keita Teranishi, Seyong Lee, Jeffrey S. Vetter, Taisuke Boku. CHARM-SYCL & IRIS: A Tool Chain for Performance Portability on Extremely Heterogeneous Systems, 2024 IEEE 20th International Conference on e-Science (e-Science), Sept. 2024.  公式リンク  
  
• Taisuke Boku, Masatake Sugita, Ryohei Kobayashi, Shinnosuke Furuya, Takuya Fujie, Masahito Ohue, Yutaka Akiyama. Improving Performance on Replica-Exchange Molecular Dynamics Simulations by Optimizing GPU Core Utilization, Aug. 2024.  公式リンク  
  
• Wentao Liang, Norihisa Fujita, Ryohei Kobayashi, Taisuke Boku. Using Intel oneAPI for Multi-hybrid Acceleration Programming with GPU and FPGA Coupling, Jan. 2024.  公式リンク  
  
• Norihisa Fujita, Beau Johnston, Ryohei Kobayashi, Keita Teranishi, Seyong Lee, Taisuke Boku, Jeffrey S. Vetter. CHARM-SYCL: New Unified Programming Environment for Multiple Accelerator Types, Nov. 2023.  公式リンク  
  
• Taisuke Boku, Ryuta Tsunashima, Ryohei Kobayashi, Norihisa Fujita, Seyong Lee, Jeffrey S. Vetter, Hitoshi Murai, Masahiro Nakao, Miwako Tsuji, Mitsuhisa Sato. OpenACC Unified Programming Environment for Multi-hybrid Acceleration with GPU and FPGA, Lecture Notes in Computer Science, pp. 662-674, Aug. 2023.  公式リンク  
  
• Norihisa Fujita, Ryohei Kobayashi, Yoshiki Yamaguchi, Taisuke Boku. Implementation and Performance Evaluation of Memory System Using Addressable Cache for HPC Applications on HBM2 Equipped FPGAs, Euro-Par 2022: Parallel Processing Workshops, pp. 121-132, May 2023.  公式リンク  
  
• Ryohei Kobayashi, Norihisa Fujita, Yoshiki Yamaguchi, Taisuke Boku, Kohji Yoshikawa, Makito Abe, Masayuki Umemura. Accelerating Radiative Transfer Simulation on NVIDIA GPUs with OpenACC, Parallel and Distributed Computing, Applications and Technologies, pp. 344-358, Apr. 2023.  公式リンク  
  
• Kohei Kikuchi, Norihisa Fujita, Ryohei Kobayashi, Taisuke Boku. Implementation and Performance Evaluation of Collective Communications Using CIRCUS on Multiple FPGAs, Feb. 2023.  公式リンク  
  
• Ryohei Kobayashi, Norihisa Fujita, Yoshiki Yamaguchi, Taisuke Boku, Kohji Yoshikawa, Makito Abe, Masayuki Umemura. GPU–FPGA-accelerated Radiative Transfer Simulation with Inter-FPGA Communication, Feb. 2023.  公式リンク  
  
• Kento Miura, Ryohei Kobayashi, Toshiyuki Amagasa, Hiroyuki Kitagawa, Norihisa Fujita, Taisuke Boku. An FPGA-based Accelerator for Regular Path Queries over Edge-labeled Graphs, 2022 IEEE International Conference on Big Data (Big Data), Dec. 2022.  公式リンク  
  
• Taisuke Boku, Norihisa Fujita, Ryohei Kobayashi, Osamu Tatebe. Cygnus - World First Multihybrid Accelerated Cluster with GPU and FPGA Coupling, Workshop Proceedings of the 51st International Conference on Parallel Processing, Aug. 2022.  公式リンク  
  
• Yuka Sano, Ryohei Kobayashi, Norihisa Fujita, Taisuke Boku. Performance Evaluation on GPU-FPGA Accelerated Computing Considering Interconnections between Accelerators, International Symposium on Highly-Efficient Accelerators and Reconfigurable Technologies, June 2022.  公式リンク  
  
• Yoshiyuki Morie, Yasutaka Wada, Ryohei Kobayashi, Ryuichi Sakamoto. Performance Evaluation of Data Transfer API for Rank Level Approximate Computing on HPC Systems, 2022 IEEE International Parallel and Distributed Processing Symposium Workshops (IPDPSW), May 2022.  公式リンク  
  
• Ryuta Kashino, Ryohei Kobayashi, Norihisa Fujita, Taisuke Boku. Multi-hetero Acceleration by GPU and FPGA for Astrophysics Simulation on oneAPI Environment, International Conference on High Performance Computing in Asia-Pacific Region, Jan. 2022.  公式リンク  
  
• Kazuki Furukawa, Ryohei Kobayashi, Tomoya Yokono, Norihisa Fujita, Yoshiki Yamaguchi, Taisuke Boku, Kohji Yoshikawa, Masayuki Umemura. An efficient RTL buffering scheme for an FPGA-accelerated simulation of diffuse radiative transfer, 2021 International Conference on Field-Programmable Technology (ICFPT), Dec. 2021.  公式リンク  
  
• Norihisa Fujita, Ryohei Kobayashi, Yoshiki Yamaguchi, Taisuke Boku. HBM2 Memory System for HPC Applications on an FPGA, 2021 IEEE International Conference on Cluster Computing (CLUSTER), Sept. 2021.  公式リンク  
  
• Ryohei Kobayashi, Kento Miura, Norihisa Fujita, Taisuke Boku, Toshiyuki Amagasa. A Sorting Library for FPGA Implementation in OpenCL Programming, Proceedings of the 11th International Symposium on Highly Efficient Accelerators and Reconfigurable Technologies, June 2021.  公式リンク  
  
• Ryuta Kashino, Ryohei Kobayashi, Norihisa Fujita, Taisuke Boku. Performance Evaluation of OpenCL-Enabled Inter-FPGA Optical Link Communication Framework CIRCUS and SMI, The International Conference on High Performance Computing in Asia-Pacific Region, Jan. 2021.  公式リンク  
  
• Norihisa Fujita, Ryohei Kobayashi, Yoshiki Yamaguchi, Taisuke Boku, Kohji Yoshikawa, Makito Abe, Masayuki Umemura. OpenCL-enabled Parallel Raytracing for Astrophysical Application on Multiple FPGAs with Optical Links, 2020 IEEE/ACM International Workshop on Heterogeneous High-performance Reconfigurable Computing (H2RC), Nov. 2020.  公式リンク  
  
• Ryohei Kobayashi, Norihisa Fujita, Yoshiki Yamaguchi, Taisuke Boku, Kohji Yoshikawa, Makito Abe, Masayuki Umemura. Accelerating Radiative Transfer Simulation with GPU-FPGA Cooperative Computation, 2020 IEEE 31st International Conference on Application-specific Systems, Architectures and Processors (ASAP), July 2020.  公式リンク  
  
• Norihisa Fujita, Ryohei Kobayashi, Yoshiki Yamaguchi, Tomohiro Ueno, Kentaro Sano, Taisuke Boku. Performance Evaluation of Pipelined Communication Combined with Computation in OpenCL Programming on FPGA, 2020 IEEE International Parallel and Distributed Processing Symposium Workshops (IPDPSW), May 2020.  公式リンク  
  
• Ryohei Kobayashi, Norihisa Fujita, Yoshiki Yamaguchi, Ayumi Nakamichi, Taisuke Boku. OpenCL-enabled GPU-FPGA Accelerated Computing with Inter-FPGA Communication, Proceedings of the International Conference on High Performance Computing in Asia-Pacific Region Workshops, Jan. 2020.  公式リンク  
  
• Ryohei Kobayashi, Norihisa Fujita, Yoshiki Yamaguchi, Ayumi Nakamichi, Taisuke Boku. GPU-FPGA Heterogeneous Computing with OpenCL-Enabled Direct Memory Access, 2019 IEEE International Parallel and Distributed Processing Symposium Workshops (IPDPSW), May 2019.  公式リンク  
  
• Norihisa Fujita, Ryohei Kobayashi, Yoshiki Yamaguchi, Taisuke Boku. Parallel Processing on FPGA Combining Computation and Communication in OpenCL Programming, 2019 IEEE International Parallel and Distributed Processing Symposium Workshops (IPDPSW), May 2019.  公式リンク  
  
• Ryohei Kobayashi, Norihisa Fujita, Yoshiki Yamaguchi, Taisuke Boku. OpenCL-enabled High Performance Direct Memory Access for GPU-FPGA Cooperative Computation, Proceedings of the HPC Asia 2019 Workshops, Jan. 2019.  公式リンク  
  
• Norihisa Fujita, Ryohei Kobayashi, Yoshiki Yamaguchi, Yuma Oobata, Taisuke Boku, Makito Abe, Kohji Yoshikawa, Masayuki Umemura. Accelerating Space Radiative Transfer on FPGA using OpenCL, Proceedings of the 9th International Symposium on Highly-Efficient Accelerators and Reconfigurable Technologies, June 2018.  公式リンク  
  
• Ryohei Kobayashi, Yuma Oobata, Norihisa Fujita, Yoshiki Yamaguchi, Taisuke Boku. OpenCL-ready High Speed FPGA Network for Reconfigurable High Performance Computing, Proceedings of the International Conference on High Performance Computing in Asia-Pacific Region, Jan. 2018.  公式リンク  
  
• Ryohei Kobayashi, Tomohiro Misono, Kenji Kise. A High-speed Verilog HDL Simulation Method using a Lightweight Translator, International Symposium on High-Efficient Accelerators ajd Reconfigurable Technologies (Heart 2016), ACM SIGARCH Computer Architecture News, Vol. 44, No. 4, pp. 26-31, Jan. 2017.  公式リンク  
  
• Tomohiro Misono, Ryohei Kobayashi, Shimpei Sato, Kenji Kise. Effective Parallel Simulation of ArchHDL under Manycore Environment, International Symposium on Computing and Networking -Across Practical Development and Thieretical Research (CANDAR), 2015 Third International Symposium on Computing and Networking (CANDAR), pp. 140-146, Dec. 2015.  公式リンク  
  
• Eri Ogawa, Yuki Matsuda, Tomohiro Misono, Ryohei Kobayashi, Kenji Kise. Reconfigurable IBM PC Compatible SoC for Computer Architecture Education and Research, IEEE 9th International Symposium on Embedded Multicore SoCs (MCSoC-15), 2015 IEEE 9th International Symposium on Embedded Multicore/Many-core Systems-on-Chip, pp. 65-72, Sept. 2015.  公式リンク  
  
• Ryohei Kobayashi, Kenji Kise. FACE: Fast and Customizable Sorting Accelerator for Heterogeneous Many-core Systems, IEEE 9th International Symposium on Embedded Multicore SoCs (MCSoC-15), 2015 IEEE 9th International Symposium on Embedded Multicore/Many-core Systems-on-Chip, pp. 49-56, Sept. 2015.  公式リンク  
  
• Takuma Usui, Ryohei Kobayashi, Kenji Kise. A Challenge of Portable and High-Speed FPGA Accelerator, The 11th International Symposium on Applied Reconfigurable Computing (ARC 2015), Lecture Notes in Computer Science, pp. 383-392, Apr. 2015.  公式リンク  
  
• Ryohei Kobayashi, Shinya Takamaeda-Yamazaki, Kenji Kise. Towards a Low-Power Accelerator of Many FPGAs for Stencil Computations, Third International Conference on Networking and Computing, 2012 Third International Conference on Networking and Computing, pp. 343-349, Dec. 2012.  公式リンク  
  

国内会議発表 (査読有り)

• Enchrnacion Immanuel Victoria, Enchrnacion Immanuel Victoria, Ryohei Kobayashi, Kenji Kise. 3bOS: A flexible and lightweight embedded OS operated using only 3 buttons, 組込みシステム シンポジウム2014（ESS2014), pp. 126-131, Oct. 2014.
• 小林諒平, 佐野伸太郎, 高前田伸也, 吉瀬謙二. メッシュ接続FPGAアレーにおける高性能ステンシル計算, 先進的計算基盤システムシンポジウム, SACSIS2012 論文集, pp. 142-149, May 2012.

国内会議発表 (査読なし・不明)

• 臼井 琢真, 眞下 達, 松田 裕貴, 小林 諒平, 吉瀬 謙二. 世界最速のFPGAソーティングアクセラレータの初期検討, 情報処理学会第７８回全国大会, Mar. 2016.
• Yuki Matsuda, Eri Ogawa, Tomohiro Misono, Ryohei Kobayashi, Kenji Kise. Frix: Feasible and Reconfigurable IBM PC Compatible SoC, 情報処理学会第７８回全国大会, Mar. 2016.
• 奥村 開里, 小林 諒平, 吉瀬 謙二. SDD内の並列性を引き出すI/Oスケジューラ, 情報処理学会SIGOS, Nov. 2015.
• 小林 諒平, 吉瀬 謙二. FPGAを用いた世界最速のソーティングハードウェアの実現に向けた試み, 電子情報通信学会研究報告RECONF2015, pp. 65-70, June 2015.
• 小林 諒平, 吉瀬 謙二. FPGAベースのソーティングアクセラレータの設計と実装, 電子情報通信学会研究報告CRSY2015, pp. 25-30, Apr. 2015.
• Ryohei Kobayashi, Kenji Kise. Ultra High-speed FPGA Accelerator for Sorting Application, 情報処理学会第７７回全国大会, Mar. 2015.
• 臼井 琢真, 小林 諒平, 吉瀬 謙二. USB3.0接続の手軽で高速なFPGAアクセラレータの設計と実装, 電子情報通信学会研究報告RECONF2015, pp. 205-210, Jan. 2015.
• Ryohei Kobayashi, Kenji Kise. Examination of HDL coding styles to reduce power consumption for FPGAs, 情報処理学会第76回全国大会, Mar. 2014.
• Ryohei Kobayashi, Shinya Takamaeda, Kenji Kise. Design of Synchronization Mechanism to Conquer the Clock Oscillator Variation for High Performance Stencil Computation Accelerator, 情報処理学会第75回全国大会, Mar. 2013.
• 小林諒平, 高前田伸也, 吉瀬謙二. メッシュ接続FPGAアレーにおける高性能ステンシル計算機の設計と実装, 電子情報通信学会研究報告 RECONF2013, pp. 159-164, Jan. 2013.
• 小林諒平, 吉瀬謙二. メッシュ接続FPGAアレーにおけるステンシル計算の検討, 情報処理学会第74回全国大会, Mar. 2012.

学位論文

• Efficient Development Infrastructure for Innovative FPGA Accelerators,  Summary,  Doctor (Engineering),  Tokyo Institute of Technology,  2016/03/26,   
• Efficient Development Infrastructure for Innovative FPGA Accelerators,  Exam Summary,  Doctor (Engineering),  Tokyo Institute of Technology,  2016/03/26,   
• Efficient Development Infrastructure for Innovative FPGA Accelerators,  Thesis,  Doctor (Engineering),  Tokyo Institute of Technology,  2016/03/26,   

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