Manojkumar Krishnan's Home Page

Manojkumar Krishnan

Senior Research Scientist
High Performance Computing Group
Computational Sciences and Mathematics Division
Pacific Northwest National Laboratory

Ph:

509-372-4206
E-mail:

manoj AT pnl DOT gov
Mail: PO Box 999, MS K7-90, Pacific Northwest National Laboratory, Richland, WA 99352
Fax: 509-372-3720
www: http://hpc.pnl.gov/people/manoj

Senior Research Scientist in the High Peformance Computing (HPC) group focusing on Parallel Computing research. I joined the HPC group at Pacific Northwest National Laboratory (PNNL) in 2002. Key developer of Global Arrays (GA), a portable shared memory parallel programming toolkit used in scalable scientific applications and other areas, and ARMCI runtime system, a portable high performance remote memory access communication interface. ARMCI has been used for implementation of the Co-Array Fortran compiler at Rice University, and a portable implementation of SHMEM, the popular one-sided communication library developed by Cray Supercomputers, Inc. Have authored and co-authored several peer-reviewed conference and journal papers in the High Performance Computing area.

Research Interests
My current research interests are:

High Performance Computing
Parallel Programming Models, One-sided Communication
Fault Tolerance, Operating and Runtime Systems
Component Technology for Parallel Computing

Research Projects

Global Arrays
ARMCI
CCA
Scalable Fault Tolerance

Publications

Krishnan M, J Nieplocha, and V Tipparaju. "Extending the MPI-2 One-sided Communication Model." in HPC Asia 2009.
Krishnan MK, and J Nieplocha. "Evaluation of Remote Memory Access and Global Arrays Programming Model on the Blue Gene/P Supercomputer." In Parallel Programming Models and Systems Software for High-End Computing , 2008.
Nieplocha J, S Krishnamoorthy, M Valiev, MK Krishnan, BJ Palmer, and P Sadayappan. 2008. "Integrated Data and Task Management for Scientific Applications." In Proceedings of ICCS: Lecture Notes in Computer Science, vol. 5101, pp. 20-31. Springer-Verlag.
Krishnan M, SJ Bohn, WE Cowley, VL Crow, and J Nieplocha, "Scalable Visual Analytics of Massive Textual Datasets", accepted for publication in IEEE International Parallel and Distributed Processing Symposium, 2007.
Palmer BJ, SM Kathmann, M Krishnan, V Tipparaju, and J Nieplocha, "The Use of Processor Groups in Molecular Dynamics Simulations to Sample Free-Energy States." Journal of Chemical Theory and Computation 3(2):583-592, 2007.
Tipparaju V, M Krishnan, F Petrini, J Nieplocha, and BJ Palmer, "Fault Resilient Global Arrays", accepted for Parallel Computing 2007.
Gorton I, D Chavarría-Miranda, M Krishnan, and J Nieplocha, "A High-Performance Event Service for HPC Applications." In Proceedings of the 3rd International Workshop on Software Engineering for High Performance Computing Applications, 2007.

J. Nieplocha, V. Tipparaju, M. Krishnan, and D. Panda. High Performance Remote Memory Access Comunications: The ARMCI Approach. International Journal of High Performance Computing and Applications, 20(2), 2006.
Jarek Nieplocha, Bruce Palmer, Vinod Tipparaju, Manojkumar Krishnan, Harold Trease and Edo Apra, “Advances, Applications and Performance of the Global Arrays Shared Memory Programming Toolkit”, International Journal of High Performance Computing Applications, Vol. 20, No. 2, 203-231p, 2006.
Manojkumar Krishnan and Jarek Nieplocha, “Memory Efficient Parallel Martrix Multiplication Operation for Irregular Problems”, in proceedings of ACM SIGMICRO Computing Frontiers, 2006.
Janssen CL, JP Kenny, I Nielsen, M Krishnan, V Gurumoorthi, E Valeev, and TL Windus, Enabling New Capabilities and Insights from Quantum Chemistry by Using Component Architectures, in Journal of Physics: Conference Series (SciDAC), 2006.
Bernholdt DE, BA Allan, RC Armstrong, F Bertrand, K Chiu, TL Dahlgren, K Damevski, WR Elwasif, TG Epperly, M Govindaraju, DS Katz, JA Kohl, M Krishnan, GK Kumfert, J Larson, S Lefantzi, MJ Lewis, AD Malony, LC McInnes, J Nieplocha, B Norris, SG Parker, J Ray, S Shende, TL Windus, and S Zhou. 2006. "A Component Architecture for High-Performance Scientiﬁc Computing ." International Journal of High Performance Computing Applications 20(2):163-202.

Manojkumar Krishnan, Yuri Alexeev, Theresa Windus and Jarek Nieplocha, “Multilevel Parallelism in Computational Chemistry using Common Component Architecture and Global Arrays”, proceedings of Supercomputing, Seattle, WA, 2005.
Nieplocha J, V Tipparaju, and M Krishnan, "Optimizing Strided Remote Memory Access Operations on the Quadrics QsNetII Network Interconnect", HPC Asia, 2005.
Yuri Alexeev, Benjamin A. Allan, Robert C. Armstrong, David E. Bernholdt, Tamara L. Dahlgren, Dennis Gannon, Curtis L. Janssen, Joseph P. Kenny, Manojkumar Krishnan, James A. Kohl, Gary Kumfert, Lois Curfman McInnes, Jarek Nieplocha, Steven G. Parker, Craig Rasmussen and Theresa L.Windus, Component-Based Software for High-Performance Scientifc Computing, in proceedings of SciDAC’ 2005, San Francisco, CA, USA. 2005. Also in, volume 16 of Journal of Physics: Conference Series, pages 536--540, Institute of Physics, 2005
Sriram Krishnamoorthy, P Sadayappan, Jarek Nieplocha and Manojkumar Krishnan, Locality-aware Load Balancing for Dynamic and Irregular Computations, in proceedings of Patterns in HPC, UIUC, 2005.
Manoj Krishnan and Jarek Nieplocha, Optimizing Performance on Linux Clusters Using Advanced Communication Protocols: Achieving Over 10 Teraflops on a 8.6 Teraflops Linpack-Rated Linux Cluster, to appear in proceedings of International Conference on Linux clusters, 2005.
Jarek Nieplocha, Manoj Krishnan, Bruce Palmer, Vinod Tipparaju, and Yeliang Zhang, Exploiting Processor Groups to Extend Scalability of the GA Shared Memory Programming Model, proceedings of ACM Computing Frontiers, 2005.
Steven Benson, Manojkumar Krishnan, Lois Curfman McInnes, Jarek Nieplocha, and Jason Sarich, “Using the GA and TAO for Solving Large-Scale Optimization Problems on Parallel Computers”, Trans. on Mathematical Software (TOMS Journal) , ACTS Collection special issue, Preprint ANL/MCS-P1084-0903, 2005.

L. C. McInnes, B. A. Allan, R. Armstrong, S. J. Benson, D. E. Bernholdt, T. L. Dahlgren, L. F. Diachin, M. Krishnan, J. A. Kohl, J. W. Larson, S. Lefantzi, J. Nieplocha, B. Norris, S. G. Parker, J. Ray, and S. Zhou, “Parallel PDE-Based Simulations Using the Common Component Architecture”, "Numerical Solution of PDEs on Parallel Computers" in the Lecture Notes in Computational Science and Engineering series of Springer-Verlag, 2004.
Manojkumar Krishnan and Jarek Nieplocha, “A Matrix Multiplication Algorithm Suitable for Clusters and Scalable Shared Memory Systems”, in proceedings of IEEE International Conference on Parallel and Distributed Processing Symposium’2004.
M. Krishnan and J. Nieplocha, "Optimizing Parallel Multiplication Operation for Rectangular and Transposed Matrices," in Proceedings of 10th IEEE International Conference on Parallel and Distributed Systems (ICPADS'04). 2004.
Manojkumar Krishnan , Jarek Nieplocha, Vinod Tipparaju, Exploiting Architectural Support for Shared Memory Communication on the Cray X1 to Optimize Bandwidth Intensive Computations, in the proceedings of CUG'04.
Manojkumar Krishnan, Vinod Tipparaju, B. Palmer, Jarek Nieplocha: Processor-Group Aware Runtime Support for Shared- and Global-Address Space Models. ICPP Workshops 2004: 506-513
Vinod Tipparaju, Manojkumar Krishnan, Bruce Palmer, Jarek Nieplocha, Porting and Optimizing Performance of Global Arrays Toolkit on the Cray X1, in proceedings of CUG'04
Joseph P. Kenny, Steven J. Benson, Yuri Alexeev, Jason Sarich, Curtis L. Janssen, Lois Curfman Mcinnes, Manojkumar Krishnan, Jarek Nieplocha, Elizabeth Jurrus, Carl Fahlstrom, and Theresa L. Windus. “Component-based integration of chemistry and optimization software”, Journal of Computational Chemistry, volume 25, number 14, pp 1717-1725,2004.

Windus TL, ER Jurrus, M Krishnan, J Nieplocha, DE Bernholdt, LC McInnes, J Sarich, and S Benson. 2003. "Using the Common Component Architecture in Chemistry." American Chemical Society, New Orleans, LA.
J. Nieplocha, V. Tipparaju, M. Krishnan, G. Santhanaraman, D.K. Panda, “Optimizing Mechanisms for Latency Tolerance in Remote Memory Access Communication on Clusters”, International Journal of High Performance Computing and Networking (IJHPCN) and best paper award at IEEE International Conference on Cluster Computing, Hong Kong, 2003.
Vinod Tipparaju, Manojkumar Krishnan, Jarek Nieplocha, Gopalakrishnan Santhanaraman, Dhabaleswar Panda, Exploiting Non-blocking Remote Memory Access Communication in Scientific Benchmarks, in Proc. High Performance Computing, 2003.

J. Nieplocha, R. Harrison, M. Krishnan, B. Palmer, and V. Tipparaju, Combining shared and distributed memory models: Evolution and recent advancements of the Global Array Toolkit, Proceedings of International Conference on Supercomputing, NYC, 2002
Manoj kumar Krishnan, S. K. Ghafoor and I. Banicescu. LBsim: A Load Balancing Simulator for Data Parallel Applications, in Proceedings of the High Performance Computing Symposium (HPC 2002), Advanced Simulation Technology Conference, San Diego, 2002.
H. Zeng, J. Devaprasad, Manoj kumar Krishnan, I. Banicescu, J. Zhu. In Proceedings of the High Performance Computing Symposium (HPC 2002), Advanced Simulation Technology Conference, San Diego, 2002. Improving Load Balancing and Data Locality in N-Body Simulations via Adaptive Weighted Fractiling.