1. Atsushi Hori, Keiji Yamamoto and Yutaka Ishikawa, “Catwalk-ROMIO: A Cost-Effective MPI-IO,” The 17th IEEE International Conference on Parallel and Distributed Systems (ICPADS 2011), 2011.
  2. Keiichi Yamamoto, Atsushi Hori, Shinji Sumimoto, and Yutaka Ishikawa, “Xruntime: A Seamless Runtime Environment for High Performance Computing,” IEEE 13th International Conference on High Performance Computing and Communications (HPCC), pp. 778 – 783, 2011.
  3. Jun Kato and Yutaka Ishikawa, “Design and Implementation of Parallel File Aggregation Mechanism,” International Workshop on Runtime and Operating Systems for Supercomputers (ROSS2011) held in conjunction with ICS2011, 2011.
  4. Takahiro Katagiri、Masahiko Sato、”An Auto-tuning Method for Run-time Data Transformation for Sparse Matrix-Vector Multiplication”、第130回HPC研究会、2011年並列/分散/協調処理に関する『鹿児島』サマー・ワークショップ(SWoPP鹿児島2011)、かごしま県民交流センター、情報処理学会研究報告HPC-130、2011.
  5. Takao Sakurai; Takahiro Katagiri; Ken Naono, Kengo Nakajima, Satoshi Ohshima, Shoji Itoh, and Hisayasu Kuroda; Mitsuyoshi Igai, “Evaluation of Numerical Policy Function on Generalized Auto-Tuning Interface OpenATLib “, SIAM Conference on Parallel Processing (PP12), MS6:Towards Smart Auto-tuning for HPC–The State-of-the-art of Auto-tuning Technologies and Future Directions – Part I of III, February 15, 2012.
  6. Jinpil Lee, Minh Tuan Tran, Tetsuya Odajima, Taisuke Boku and Mitsuhisa Sato、”An Extension of XcalableMP PGAS Language for Multi-node GPU Clusters”, Ninth International Workshop on Algorithms, Models and Tools for Parallel Computing on Heterogeneous Platforms (HeteroPar 2011), 2011.


  1. Takahiro Katagiri, Takao Sakurai, Satoshi Ohshima, Mitsuyoshi Igai, Hisayasu Kuroda, Kengo Nakajima, Ken Naono, Ken Naono and Shoji Itoh, “Numerical Policy Function on Auto-tuned Sparse Iterative Solver Xabclib”,2010 SIAM Annual Meeting, (July 12-16, 2010, The David Lawrence Convention Center, Pittsburgh, PA), MS105, Architecture-Aware Algorithms – Part I of II, 10:30 AM – 12:30 PM, Room: Spirit of Pittsburgh B – Level 3, (Organizer: Xiaoye S. Li (Lawrence Berkeley National Laboratory)),招待講演,2010.
  2. Takahiro Katagiri, “Challenges of Run-time Auto-tuning for Sparse Iterative Solvers”,Fifth International Workshop on Automatic Performance Tuning (iWAPT2010), Proceedings of VECPAR‘2010, 2pages., Berkeley, California, USA, June 22,2010.(A Position Paper)
  3. Takao Sakurai, Ken Naono, Takahiro Katagiri, Hisayasu Kuroda, Kengo Nakajima, Satoshi Ohshima, Shoji Itoh, Mituyoshi Igai,“Development of Xabclib: A Sparse Iterative Solver with Numerical Computation Policy Interface, SIAM: SIAM Conference on Computational Science and Engineering (CSE11), Reno, Nevada, February 28-March 4, 2011.
  4. Itoh Shoji,Katagiri Takahiro,Sakurai Takao,Igai Mitsuyoshi,Ohshima Satoshi, Kuroda Hisayasu,Naono Ken,Nakajima Kengo, “An improvement in preconditioned BiCGStab method”, 2011年ハイパフォーマンスコンピューティングと計算科学論文集HPCS2011、2011年1月18日(火)-1月19日(水)、HPCS2011論文集、2011.
  5. Kazuki Ohta, Dries Kimpe, Jason Cope, Kamil Iskra, Robert Ross, Yutaka Ishikawa, Optimization Techniques at the I/O Forwarding Layer, IEEE International Conference on Cluster Computing (Cluster 2010), Heraklion, Greece, pp. 312-321, September 2010.
  6. Masahiro Nakao, Jinpil Lee, Taisuke Boku, Mitsuhisa Sato. “XcalableMP Implementation and Performance of NAS Parallel Benchmarks”, Fourth Conference on Partitioned Global Address Space Programming Model (PGAS10), New York, USA, Oct., 2010.
  7. Jinpil Lee, Masahiro Nakao, Mitsuhisa Sato. SC10 HPC Challenge Submission for XcalableMP(selected as a finalist of HPCC Class2), SC10, New Orleans, Louisiana, USA, Nov., 2010. SC10 Research Exhibition in Booth #1321 T2K Open Supercomputer Alliance, New Orleans, Louisiana, USA, Nov., 2010.
  8. Atsushi Hori, Jinpil Lee, Mitsuhisa Sato, “Audit: New Synchronization for the GET/PUT Protocol,” The 1st Workshop on Communication Architecture for Scalable Systems, International Parallel and Distributed Processing Symposium (IPDPS 2011), Anchorage, Alaska, USA, May, 2011(採択通知平成22年度)
  9. Jinpil Lee and Mitsuhisa Sato: Implementation and Performance Evaluation of XcalableMP: A Parallel Programming Language for Distributed Memory Systems, The 39th international Conference on Parallel Processing Workshops (ICPPW10), pp.413-420


  1. Kazuki, Ohta, Hiroya Matsuba, and Yutaka Ishikawa, “Improving Parallel Write by Node-Level Request Scheduling,” IEEE CCGrid2009, 2009.
  2. Atsushi Hori, Yoshikazu Kamoshida, Hiroya Matsuba, Kazuki Ohta, Takashi Yasui, Shinji Sumimoto and Yutaka Ishikawa, “On-Demand File Staging System for Clusters,” IEEE Cluster 2009, 2009.
  3. Shinji Sumimoto, Kohta Nakashima, Akira Naruse, Kouichi Kumon, Takashi Yasui, Yoshikazu Kamoshida, Hiroya Matsuba, Atsushi Hori and Yutaka Ishikawa, “The Design of Seamless MPI Computing Environment for Commodity-based Clusters,” Euro PVM/MPI09, 2009.
  4. Takahiro Katagiri、”Xabclib: A Sparse Iterative Solver with a Generalized Auto-tuning Interface, and Overview of Auto-tuning Studies in Japan”、米国エネルギー省(DOE)主催、Center for Scalable Application Development Software (CScADS) Summer Workshops, Workshop on Libraries and Autotuning for Petascale Applications、2009.
  5. Jinpil Lee and Mitsuhisa Sato, SC09 HPC Challenge Submission for XcalableMP, SC09 HPCC BOF, 2009.
  6. Tasuku HIRAISHI, Hiroshi NAKASHIMA, “Xcrypt: Highly-Productive Parallel Script Language,” 3rd  French-Japanese Workshop Petascale Applications, Algorithms and Programming (PAAP2009), Kyoto University, 2009.
  7. Hiroshi Nakashima, Tasuku Hiraishi, Tatsuya Abe, Yohei Miyake, “Progress Report of Xcrypt: What You Can Do Now with the Parallel Script Language”, WPSE2010, 2010.


  1. Kazuki Ohta, Hiroya Matsuba, and Yutaka Ishikawa, “Improving Parallel Write by Node-Level Request Scheduling,” IEEE Cluster 2008, 2008 (Poster)
  2. Kengo Nakajima, “Parallel Programming Support for Applications with Unstructured Grids  – Expectations for “Local View” of XcalableMP-,” International Workshop on Peta-Scale Computing Programming Environment, Languages, and Tools, 2009.
  3. Yutaka Ishikawa, “Seamless runtime environment,” International Workshop on Peta-Scale Computing Programming Environment, Languages, and Tools, 2009.
  4. Jinpil Lee, Mitsuhisa Sato and Taisuke Boku “OpenMPD: A Directive-Based Data Parallel Language Extensions for Distributed Memory Systems,” First International Workshop on Parallel Programming Models and Systems Software for High-End Computing (P2S2), 2009.
  5. Mitsuhisa Sato, “Towards next generation parallel language framework for Petascale systems: XcalableMP project and Experience from HPF”, climate 09 Meeting, ORNL, 2009.
  6. Mitsuhisa Sato, “Overview of XcalableMP project,” International Workshop on Peta-Scale Computing Programming Environment, Languages, and Tools, 2009.
  7. Hiroshi Nakashima, “Xcrypt: Highly-Productive Parallel Script Language,” International Workshop on Peta-Scale Computing Programming Environment, Languages, and Tools, 2009.
  8. Hiroshi Nakashima, “T2K Open Supercomputer: Inter-University and Inter-Disciplinary Collaboration on the New Generation Supercomputer”, Intl. Conf. Informatics Education and Research for Knowledge-Circulating Society (ICKS’08), Jan. 2008. [PDF] [slide]
  9. Hiroshi Nakashima, Mitsuhisa Sato, Taisuke Boku, Yutaka Ishikawa, “T2K Open Supercomputer: Its Concept and Architecture”, France-Japan WS Petascale Applications, Algorithms and Programming, Nov. 2008. [slide]
  10. Yutaka Ishikawa, “Resource Management Issues in Large-Scale Cluster”,France-Japan WS Petascale Applications, Algorithms and Programming, Nov. 2008 [slide]


  1. Mitsuhisa Sato, “Bandwidth-aware design of large-scale clusters for scientific computations”, High performance computation conference 2007 (HPCC-07), Sept. 2007. [slide]
  2. Research Exhibition “Overview of T2K Open Supercomputer Alliance”, SC07, Nov 2007 [PDF]
  3. Research Exhibition ”Concepts of T2K Open Supercomputer Specifications”,SC07,Nov 2007 [PDF]
  4. Research Exhibition ”Open Supercomputer Architecture”,SC07,Nov 2007 [PDF]


  1. Research Exhibition “T2K Open Supercomputer Alliance”, SC06, Nov 2006 [PDF]
  2. Research Exhibition “Basic Concept and Approach of Open Supercomputer”, SC06,Nov 2006 [PDF]
  3. Research Exhibition “Specification of Open Supercomputer”, SC06,Nov 2006 [PDF]