Professional Committees

Conference/Workshop Chairs

• Registration Chair, Social Media Co-Chair, 52nd International Symposium on Computer Architecture (ISCA2025), June 2025.
• Local arrangement Co-chair, 25th International Workshop on Languages and Compilers for Parallel Computing (LCPC2012), September 2012.

Conference/Workshop Committees

Conferences

• ACM SIGPLAN Symposium on Principles and Practice of Parallel Programming (PPoPP)
• PC (2017, 2026), ERC (2022)
• IEEE International Parallel and Distributed Processing Symposium (IPDPS)
• PC / TPC (2015, 2019)
• ACM International Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS)
• ERC (2018)
• International European Conference on Parallel and Distributed Computing (Euro-Par)
• PC (2023)
• International Conference on Computer Science and Software Engineering (CASCON)
• PC (2018-2025)
• IEEE International Conference on Parallel and Distributed Systems (ICPADS)
• PC (2016)
• IPSJ Symposium on Advanced Computing Systems and Infrastructures (SACSIS)
• PC (2013)

Workshops

• IPDPS Workshops
• High-level Parallel Programming Models and Supportive Environments (HIPS): PC (2026)
• Advances in Parallel and Distributed Computational Models (APDCM): PC (2026)
• SC Workshops
• Programming Environments for Heterogeneous Computing (PEHC): PC (2021)
• SPLASH Workshops
• The Vivek Sarkar Festschrift Symposium (VIVEKFEST): Reviewer (2024)
• Software Engineering for Parallel Systems (AI-SEPS/SEPS): PC (2016-2019)
• CANDAR Workshops
• Large-scale HPC Application Modernization (LHAM): PC (2017, 2018, 2021)
• Computer Systems and Architectures (CSA): PC (2019)
• Other Workshops
• Chapel Implementers and Users Workshop (CHIUW): PC (2022, 2023)
• Parallel Optimization using/for Multi- and Many-core High Performance Computing (POMCO): PC (2020)
• Languages and Compilers for Parallel Computing (LCPC): PC (2019)

Journal Reviewers

• ACM
  • Transactions on Quantum Computing (TQC) (2026)
  • Computing Surveys (CSUR) (2025, 2026)
  • Transactions on Mathematical Software (TOMS) (2025)
  • Transactions on Architecture and Code Optimization (TACO) (2021, 2022, 2025)
  • Transactions on Programming Languages and Systems (TOPLAS) (2018)
  • Transactions on Embedded Computing Systems (TECS)(2015)
• IEEE
  • Access (2026)
  • Transactions on Parallel and Distributed Systems (TPDS)(2015, 2025, 2026)
  • Transactions on Mobile Computing (TMC) (2025)
  • Micro (2022)
• Wiley Concurrency and Computation: Practice and Experience (2024)
• PLOS ONE (2023, 2024)
• Journal of Cybersecurity and Privacy (JCP)(2023)
• Arabian Journal for Science and Engineering (2017)
• Journal of Parallel and Distributed Computing (JDPC) (2017)
• IPSJ (Information Processing Society of Japan) Journals (2014, 2015, 2024)
• IEICE (The Institute of Electronics, Information and Communication Engineers) Transactions on Information and Systems (2012, 2013, 2020)

Journal Editors

• Associate Editor, IEICE Transactions on Information and Systems (2023-)
• Guest Associate Editor, IEICE Special Section on Low-Power and High-Speed Chips (2022-)

External Reviewers

• The IEEE Cluster Conference(IEEE Cluster 2017)
• International Conference on Network and Parallel Computing (NPC2016, NPC2017)
• International Conference on Parallel Processing (ICPP2016)
• International Conference on Parallel Architectures and Compilation Techniques (PACT2015)
• International Conference for High Performance Computing, Networking, Storage and Analysis (SC13)
• International Conference on Supercomputing (ICS2013, ICS2018)
• International Conference on Parallel and Distributed Systems (ICPADS2013)
• International Conference on Computer Design (ICCD2012, ICCD2013, ICCD2014)
• International Workshop on Languages and Compilers for Parallel Computing (LCPC2013, LCPC2014, LCPC2015, LCPC2018)

Specification Committees

• OpenSHMEM Application Programming Interface (2022-)

Graduate Mentorship and Thesis Committees

Dr. Hayashi has served as a co‑advisor and Ph.D. thesis committee member for multiple doctoral students in programming languages, runtime systems, and high‑performance computing, collaborating with Georgia Tech faculty such as Vivek Sarkar, Tom Conte, and Richard Vuduc. His mentorship focuses on scalable asynchronous runtimes, actor‑based distributed systems, sparse linear algebra, and large‑scale graph analytics. Mentees have received competitive external recognition, including the NERSC Early Career HPC Achievement Award.