I am an associate professor of computer systems at Tokyo University of Science (TUS). I received my Ph.D. from the department of Electronic and Information Engineering, Tokyo University of Agriculture and Technology in 2019. My research interests are operating systems, computer architectures, heterogeneous computing, cloud computing, secure/trusted systems, and distributed/disaggregated systems.
Postdoctoral researcher, Chair of Decentralized Systems Engineering at TU Munich, Feb. 2021 - Oct. 2023.
Postdoctoral researcher, Processor Research Team at R-CCS, Apr. 2019 - Jan. 2021.
JSPS Research Fellow (DC1), Japan Society for the Promotion of Science, Apr. 2016 - Mar. 2019.
Research trainee, National Institute of Advanced Industrial Science and Technology (AIST), Apr. 2017 - Mar. 2019.
Internship, Microsoft Research Asia (MSRA), Sep. 2017 - Jan. 2018.
Internship, National Institute of Advanced Industrial Science and Technology (AIST), Aug. 2016 - Sep. 2016.
Awards
IPSJ SIG-OS endorsed my Ph.D. thesis (研究会推薦博士論文), Jul. 2019.
Award of Excellence for Stars of Tomorrow Internship Program , Microsoft Research Asia, Jan. 2018.
Best Research Award (情報工学専攻最優秀研究賞), Department of Computer and Information Sciences at Tokyo University of Agriculture and Technology, Mar. 2016.
Outstanding Research Award (情報工学専攻優秀研究賞), Department of Computer and Information Sciences at Tokyo University of Agriculture and Technology, Mar. 2015.
Grants
Co-PI, Intel Research Funds for Trustworthy Data Center of the Future (TDCoF), "Trustworthy Disaggregated Heterogeneous Architectures," 300K USD (44,800K JPY), Apr. 2024 - Mar. 2027.
PI, Grant-in-Aid for Early-Career Scientists, "Light-weight and Flexible Live Migration for Cloud FPGAs," 4,290K JPY, Apr. 2020 - Mar. 2021.
*Acceptance rate: 42.3% (3,807/9,008 applicants)
Co-I, Grant-in-Aid for Scientific Research (A), "ポストムーア時代のスケーラブル計算機とそのシステムソフトウェアの創成," 44,720K JPY, Apr. 2020 - Mar. 2024.
PI, Grant-in-Aid for Research Activity start-up, "超軽量なOS技術を用いたクラウド環境におけるFPGA仮想化基盤の研究," 2,200K JPY, Oct. 2019 - Mar. 2021.
*Acceptance rate: 37.7% (1,392/3,689 applicants)
Co-I, Grant-in-Aid for Scientific Research (B), "Creation of non-Neumann FPGA Overlay Architecture for Innovating HPC," 18,720K JPY, Apr. 2017 - Mar. 2020.
PI, JSPS Research Fellowship for Young Scientists (DC1), "3次元積層によるヘテロジニアスマルチコアプロセッサの仮想化と資源管理の研究," 1,900K JPY, Apr. 2016 - Mar. 2019.
*Acceptance rate: 21.8% (727/3,341 applicants)
Publications
Selected Publications
[OSDI'26] J. Chen, A. Panda, H. Unnibhavi, A. Koshiba, P. Bhatotia: "𝜇Shell: A Microkernel-based FPGA Shell Architecture," to appear, July 2026.
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Acceptance rate: 19.9% (136 papers out of 681 submissions).
[EuroSys'26] F. Gust, S. Anzai, C. Mainas, A. Koshiba, P. Bhatotia: "Proteus: Heterogeneous FPGA Virtualization," pp.328-349, April 2026.
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Acceptance rate: 19.1% (138 papers out of 723 submissions).
[SoCC'25]A. Koshiba, C. Mainas, P. Bhatotia: "Funky: Cloud-native FPGA Virtualization and Orchestration," pp.209-224, Nov. 2025.
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Acceptance rate: 26.7% (67 papers out of 251 submissions).
[HPDC'25] C. Mainas, M. Lambeck, B. Scheufler, L. Bindschaedler, A. Koshiba, P. Bhatotia: "F3: An FPGA-accelerated FaaS Framework," pp.1-16, July 2025.
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Acceptance rate: 18.8% (25 papers out of 133 submissions).
[ASPLOS'25] D. Giantsidi, J. Pritzi, F. Gust, A. Katsarakis, A. Koshiba, P. Bhatotia: "TNIC: A Trusted NIC Architecture," pp.1282-1301, March 2025.
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Acceptance rate: 17.5%-19.7% (160-180 papers out of 912 submissions).
[USENIX ATC'24] J. Chen, H. Unnibhavi, A. Koshiba, P. Bhatotia: "vFPIO: A Virtual I/O Abstraction for FPGA-accelerated I/O Devices," pp.1167-1184, Jul. 2024.
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Acceptance rate: 15.8% (77 papers out of 482 submissions).
Refereed International Conferences
J. Chen, A. Panda, H. Unnibhavi, A. Koshiba, P. Bhatotia: "𝜇Shell: A Microkernel-based FPGA Shell Architecture," OSDI'26, to appear, July 2026.
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F. Gust, S. Anzai, C. Mainas, A. Koshiba, P. Bhatotia: "Proteus: Heterogeneous FPGA Virtualization," EuroSys'26, pp.328-349, April 2026.
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A. Koshiba, C. Mainas, P. Bhatotia: "Funky: Cloud-native FPGA Virtualization and Orchestration," SoCC'25, pp.209-224, Nov. 2025.
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C. Mainas, M. Lambeck, B. Scheufler, L. Bindschaedler, A. Koshiba, P. Bhatotia: "F3: An FPGA-accelerated FaaS Framework," HPDC'25, pp.1-16, July 2025.
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D. Giantsidi, J. Pritzi, F. Gust, A. Katsarakis, A. Koshiba, P. Bhatotia: "TNIC: A Trusted NIC Architecture," ASPLOS'25, pp.1282-1301, March 2025.
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J. Chen, H. Unnibhavi, A. Koshiba, P. Bhatotia: "vFPIO: A Virtual I/O Abstraction for FPGA-accelerated I/O Devices," USENIX ATC'24, pp.1167-1184, Jul. 2024.
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A. Koshiba, F. Gust, J. Pritzi, A. Vahldiek-Oberwagner, N. Santos, P. Bhatotia: "Trusted Heterogeneous Disaggregated Architectures," Proceedings of the 14th ACM SIGOPS Asia-Pacific Workshop on Systems (APSys 2023), pp.72-79, Aug. 2023.
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K. Sano, A. Koshiba, T. Miyajima, and T. Ueno: "ESSPER: Elastic and Scalable FPGA-Cluster System for High-Performance Reconfigurable Computing with Supercomputer Fugaku," Proceedings of the International Conference on High Performance Computing in Asia-Pacific Region (HPC Asia 2023), pp.140-150, Feb. 2023.
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K. Sano, A. Koshiba, T. Miyajima, and T. Ueno: "ESSPER: Elastic and Scalable System for High-Performance Reconfigurable Computing with Software-bridged APIs," International Conference on Field-Programmable Technology (ICFPT 2022), pp.1-1, Dec. 2022.
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T. Ueno, A. Koshiba, and K. Sano: "Virtual Circuit-switching Network with Flexible Topology for High-performance FPGA Cluster," IEEE 32nd International Conference on Application-specific Systems, Architectures and Processors (ASAP 2021), pp.41-48, Jul. 2021.
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A. Koshiba, K. Watanabe, T. Miyajima, and K. Sano: "Performance Evaluation and Power Analysis of Teraflop-scale Fluid Simulation with Stratix 10 FPGA," The 28th ACM/SIGDA International Symposium on Field-Programmable Gate Arrays (FPGA 2020), poster, Feb. 2020.
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R. Iakymchuk, S. Graillat, F. Jézéquel, D. Mukunoki, T. Imamura, Y. Tan, A. Koshiba, J. Huthmann, K. Sano, N. Fujita, T. Boku: "Optimizing Precision for High-Performance, Robust, and Energy-Efficient Computations," International Conference on High Performance Computing in Asia-Pacific Region (HPCAsia 2020), poster, Jan. 2020.
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A. Koshiba and K. Sano: "System Software Support for Fast and Flexible Task Management on a Large-scale FPGA cluster," International Conference on High Performance Computing in Asia-Pacific Region (HPC Asia 2020), poster, Jan. 2020.
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A. Koshiba, Y. Yan, Z. Guo, M. Namiki, and L. Zhou: "TEE-KV: Secure Immutable Key-Value Store for Trusted Execution Environments," The ACM Symposium on Cloud Computing (SoCC 2018), poster, Oct. 2018.
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A. Koshiba, R. Sakamoto, and M. Namiki: “OpenCL Runtime for OS-driven Task Pipelining on Heterogeneous Accelerators,” The 24 th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications (RTCSA2018), poster, Aug. 2018.
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S. Hamada, A. Koshiba, M. Namiki, and H. Amano: “Building Block Operating System for 3D Stacked Computer Systems with Inductive Coupling Interconnect,” 14th International SoC Design Conference (ISOCC), oral, Nov. 2017.
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A. Koshiba, T. Hirofuchi, S. Akiyama, R. Takano, and M. Namiki: “Towards write-back aware software emulator for non-volatile memory,“ The 6th IEEE Non-Volatile Memory Systems and Applications Symposium (NVMSA), pp. 1-6, Aug. 2017.
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A. Koshiba, R. Sakamoto, and M. Namiki: “Operating System Support for Fine-grained Pipeline Parallelism on Heterogeneous Multicore Accelerators,” The European Conference on Computer Systems (EuroSys), poster, Apr. 2017.
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S. Hamada, A. Koshiba, and M. Namiki: “Basic Design of OS Scheduler for SOTB CPU "GC-SOTB" to Reduce Power Consumption,” IEEE Symposium on Low-Power and High-Speed Chips (COOLChips) 20, poster, Apr. 2017.
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A. Koshiba, L. Guo, M. Sato, and M. Namiki: “Energy-saving Control based on Dynamic Prediction with Exponential Smoothing on KVM Virtualized Environment,” IEEE Symposium on Low-Power and High-Speed Chips (COOLChips) XIX, poster, Apr. 2016.
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A. Koshiba, J. Tsukamoto, M. Wada, R. Sakamoto, M. Sato, T. Kosaka, K. Usami, H. Amano, M. Kondo, H. Nakamura, and M. Namiki: “A Fine-grained Power Gating Control using Leakage Monitor by Linux Process Scheduler,” IEEE Symposium on Low-Power and High-Speed Chips (COOLChips) XVII, poster, Apr. 2014.
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Refereed Journal Papers
A. Koshiba, T. Hirofuchi, R. Takano, and M. Namiki: "A Software-based NVM Emulator Supporting Read/Write Asymmetric Latencies," IEICE TRANSACTIONS on Electronics, Vol.E102-D, No.12, pp.2377-2388, 2019.
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A. Koshiba, R. Sakamoto, M. Sato, K. Usami, H. Amano, M. Kondo, H. Nakamura, and M. Namiki: "An Operating System Guided Fine-Grained Power Gating Control Based on Runtime Characteristics of Applications," IEICE TRANSACTIONS on Electronics, Vol.E99-C, No.8, pp.926-935, 2016.
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A. Koshiba, M. Wada, R. Sakamoto, M. Sato, T. Kosaka, K. Usami, H. Amano, M. Kondo, H. Nakamura, and M. Namiki: "A Fine-grained Power Gating Control on Linux Monitoring Power Consumption of Processor Functional Units," IEICE TRANSACTIONS on Electronics, Vol.E98-C, No.7, pp.559-568, 2015.
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Y. Yan, Z. Guo, L. Zhou, A. Koshiba: "Secure dataset management," US Patent Application #20210073410, Mar 11, 2021.
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Service
PC Member
2027: EuroSys, ASPLOS*
2026: Middleware, SoCC
2025: Middleware, xSIG
2024: xSIG
2023: Middleware, ICDCS, xSIG, ComSys
2022: COOLChips, xSIG, ComSys
2021: ComSys
2020: CANDAR
*External Reviewer
Executive Board Member
SIG-OS, Information Processing Society of Japan (IPSJ):
2026-now.
Board Member
SIG-OS, Information Processing Society of Japan (IPSJ):
2021-2025.
External Reviewer
IEEJ Transactions on Electronics, Information and Systems:
2023
IPSJ Transactions on Advanced Computing Systems (ACS):
2022
IEICE Transactions on Electronics:
2020
IEICE Transactions on Information and Systems:
2019, 2020, 2021, 2022
Teaching
Supervised students (~2026.3)
Martin Lambeck, MSc thesis, "Utilizing dynamic partial reconfiguration in an FPGA-accelerated FaaS architecture," TU Munich, SS 2024.
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Felix Gust, MSc thesis, "Prototyping a Secure Controller for Trusted Heterogeneous Disaggregated Architectures," TU Munich, SS 2023.
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Anand Krishna Rallabhandi, MSc thesis, "Heterogeneity-Aware Scheduling Algorithms for FPGA Workloads in Cloud Environments," TU Munich, SS 2023.
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Bruno Scheufler, BSc thesis, "Cloud-Native Scheduling for Serverless FPGAs," TU Munich, SS 2023.
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Jiong Liu, MSc thesis, "Evaluation of Data-Intensive Accelerated Functions in Computational Storage Devices," TU Munich, WS 2022.
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Yuan Luo, Guided research, "A Comprehensive Study of Coyote Memory System," TU Munich, WS 2022.
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Zirong Cai, MSc thesis, "Frontend Development of Distributed FPGA Management in Serverless Computing," TU Munich, WS 2022.
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