P. (Saday) Sadayappan

P. (Saday) Sadayappan
Professor

Department of Computer Science and Engineering
595 Dreese Lab, 2015 Neil Avenue
Ohio State University, Columbus, Ohio 43210 USA
Email:sadayappan.1_at_osu.edu
+1-614-292-0053 (office), +1-614-292-2911 (fax)

Teaching

CSE621 (Introducton to High-Performance Computing)
CSE 721 (Parallel Computing)
CSE 778 (Introduction to Computer Aided Design of VLSI)

Research Interests

Compile/Runtime Systems for High Performance Computing
Scheduling, Resource Management, Grid Computing

Software

Tensor Contraction Engine (TCE)
PLuTo Automatic Parallelizer

Selected Recent Publications

U. Bondhugula, A. Hartono, J. Ramanujam, and P. Sadayappan, "PLUTO: A Practical and Fully Automatic Polyhedral Program Optimization System," Proc. ACM SIGPLAN 2008 Conference on Programming Language Design and Implementation (PLDI 08), Tucson, June 2008. [pdf] [Extended version]
U. Bondhugula, M. Baskaran, S. Krishnamoorthy, J. Ramanujam, A. Rountev, and P. Sadayappan, "Automatic Transformations for Communication-Minimized Parallelization and Locality Optimization in the Polyhedral Model," in Proc. CC 2008 - International Conference on Compiler Construction, Budapest, Hungary, March-April 2008. [pdf] [Extended version]
M. Baskaran, U. Bondhugula, S. Krishnamoorthy, J. Ramanujam, A. Rountev and P. Sadayappan, "Automatic Data Movement and Computation Mapping for Multi-level Parallel Architectures with Explicitly Managed Memories," in Proc. 13th ACM SIGPLAN Symposium on Principles and Practice of Parallel Programming, (PPoPP 2008), Salt Lake City, UT, February 2008. [pdf] [Extended version]
X. Gao, S. Krishnamoorthy, S. Sahoo, C. Lam, G. Baumgartner, J. Ramanujam, and P. Sadayappan, "Efficient Search-Space Pruning for Integrated Fusion and Tiling Transformations," Concurrency and Computation: Practice and Experience, 2007. [pdf]
S. Krishnamoorthy, M. Baskaran, U. Bondhugula, J. Ramanujam, A. Rountev and P. Sadayappan, "Effective Automatic Parallelization of Stencil Computations," in Proc. ACM SIGPLAN 2007 Conference on Programming Language Design and Implementation (PLDI 07), San Diego, June 2007. [pdf]
U. Bondhugula, J. Ramanujam, and P. Sadayappan, "Automatic Mapping of Nested Loops to FPGAs," in Proc. ACM SIGPLAN 2007 Symposium on Principles and Practice of Parallel Programming (PPoPP 07), San Jose, CA, March 2007. [pdf]
U. Bondhugula, J. Ramanujam, and P. Sadayappan. PLUTO: A Practical and Fully Automatic Polyhedral Program Optimization Systems. Technical Report OSU-CISRC-11/07-TR70, Department of Computer Science and Engineering, Ohio State University, November 2007. [pdf]
U. Bondhugula, M. Baskaran, S. Krishnamoorthy, J. Ramanujam, A. Rountev, and P. Sadayappan. Affine Transformations for Communication Minimal Parallelization and Locality Optimization of Arbitrarily Nested Loop Sequences. Technical Report OSU-CISRC-5/07-TR43, Department of Computer Science and Engineering, Ohio State University, May 2007. [pdf]
S. Krishnan, S. Krishnamoorthy, G. Baumgartner, C. Lam, J. Ramanujam, P. Sadayappan, and V. Choppella, "Efficient Synthesis of Out-of-Core Algorithms Using a Nonlinear Optimization Solver," Journal of Parallel and Distributed Computing, vol. 66, no. 5, pp. 659-673, May 2006. [pdf]
A. Auer, G. Baumgartner, D. Bernholdt, A. Bibireata, V. Choppella, D. Cociorva, X. Gao, R. Harrison, S. Krishnamoorthy, S. Krishnan, C. Lam, Q. Lu, M. Nooijen, R. Pitzer, J. Ramanujam, P. Sadayappan, and A. Sibiryakov, "Automatic Code Generation for Many-Body Electronic Structure Methods: The Tensor Contraction Engine," Molecular Physics, vol. 104, no. 2, pp. 211--228, January 2006. [pdf]
A. Hartono, Q. Lu, X. Gao, S. Krishnamoorthy, M. Nooijen, G. Baumgartner, D. Bernholdt, R. Pitzer, J. Ramanujam, A. Rountev, and P. Sadayappan, "Identifying Cost-Effective Common Subexpressions to Reduce Operation Count in Tensor Contraction Evaluations," in Proc. International Conference on Computational Science 2006 (ICCS 2006), Reading, UK, Lecture Notes in Computer Science, Springer-Verlag, 2006. [pdf]
G. Baumgartner, A. Auer, D. Bernholdt, A. Bibireata, V. Choppella, D. Cociorva, X. Gao, R. Harrison, S. Hirata, S. Krishnamoorthy, S. Krishnan, C. Lam, Q. Lu, M. Nooijen, R. Pitzer, J. Ramanujam, P. Sadayappan, and A. Sibiryakov, "Synthesis of High-Performance Parallel Programs for a Class of ab initio Quantum Chemistry Models," Proceedings of the IEEE, vol. 93, no. 2, pp. 276-292, February 2005. [pdf]
X. Gao, S. Sahoo, Q. Lu, G. Baumgartner, C. Lam, J. Ramanujam, and P. Sadayappan, "Performance Modeling and Optimization of Parallel Out-of-Core Tensor Contractions," in Proc. ACM SIGPLAN 2005 Symposium on Principles and Practice of Parallel Programming, Chicago, IL, June 2005. [pdf]
A. Hartono, A. Sibiryakov, M. Nooijen, G. Baumgartner, D.E. Bernholdt, S. Hirata, C. Lam, R. Pitzer, J. Ramanujam, and P. Sadayappan, "Automated Operation Minimization of Tensor Contraction Expressions in Electronic Structure Calculations," in Proc. International Conference on Computational Science 2005 (ICCS 2005), Atlanta, GA, May 2005. [pdf]
Efficient Synthesis of Out-of-core Algorithms Using a Nonlinear Optimization Solver, Sandhya Krishnan, Sriram Krishnamoorthy, Gerald Baumgartner, Chi-Chung Lam, J. Ramanujam, and P. Sadayappan. In Proceedings of the 18th International Parallel and Distributed Processing Symposium (2004 IPDPS Conference), Santa Fe, April 2004. (Best Paper Award) [pdf]
Data Locality Optimization for Synthesis of Efficient Out-of-Core Algorithms Sandhya Krishnan, Sriram Krishnamoorthy, Gerald Baumgartner, Daniel Cociorva, Chi-Chung Lam, P. Sadayappan, J. Ramanujam, David E. Bernholdt, and Venkatesh Choppella. In Proceedings of the International Conference on High-Performance Computing (HiPC '03), Hyderabad, India, December 2003, Springer Verlag, Lecture Nodes in Computer Science. (Best Paper Award)
Global Communication Optimization for Tensor Contraction Expressions under Memory Constraints D. Cociorva, X. Gao, S. Krishnan, G. Baumgartner, C. Lam, P. Sadayappan, J. Ramanujam. In Proceedings of the International Parallel and Distributed Processing Symposium, Nice, France, April, 2003.
A High-Level Approach to Synthesis of High-Performance Codes for Quantum Chemistry G. Baumgartner, D.E. Bernholdt, D. Cociorva, R. Harrison, S. Hirata, C. Lam, M. Nooijen, R. Pitzer, J. Ramanujam, P. Sadayappan. In Proceedings of Supercomputing 2002, Baltimore, Maryland, November 2002.
Automatic Synthesis of High-Performance Codes for Quantum Chemistry Applications G. Baumgartner, D.E. Bernholdt, D. Cociorva, R. Harrison, C. Lam, M. Nooijen, J. Ramanujam, P. Sadayappan. In Proceedings of the Workshop on Performance Optimization for High-Level Languages and Libraries (POHLL-02), New York, New York, June 2002.
Space-Time Trade-Off Optimization for a Class of Electronic Structure Calculations D. Cociorva, G. Baumgartner, C. Lam, P. Sadayappan, J. Ramanujam, M. Nooijen, D.E. Bernholdt, R. Harrison. In Proceedings of the ACM SIGPLAN 2002 Conference on Programming Language Design and Implementation (PLDI '02), Berlin, Germany, June 2002, pp. 177-186.