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Pending and Granted Patents

US Pat No.6,996,517, E. Papaefstathiou "A Performance Technology Infrastructure for Modeling the Performance of Computer Systems".  

US Pat No.6,925,431, A Method and System for Predicting Communication Delays of Detailed Application Workloads.

Late Binding Of Resource Allocation In A Performance Simulation Infrastructure.

Evaluating Hardware Models Having Resource Contention.

Action Based Services in a Performance Simulation Infrastructure.

US Pat No.7,107,191, Modular Architecture for Optimizing a Configuration of a Computer System.

Late Binding Of Resource Allocation in a Performance Simulation Infrastructure.  

Evaluating Hardware Models Having Resource Contention

Automatic Validation and Calibration of Transaction-Based Performance Models To Reflect Actual Computer System Performance  

Automatic configuration of Transaction-Based Performance Models to reflect actual computer system deployments  

Generating Static Performance Modeling Factors in a Deployed System  

Model-Based Capacity Planning  

Preconditioning for Stochastic Simulation of Computer System Performance  

Prescriptive Architecture Recommendations  

Systems and Methods for Device Simulation  

Methods for Managing Capacity

Consolidation Report and Deployment Based on Workload Characterization

Simulation of Connected Devices

Detecting Computer System Simulation Errors

Simulation of Distributed Networks

Dynamic Transaction Generation

Model-Based Policy Appication

Publications

S. Rosaria, E. Papaefstathiou, and G. LaVigne, Model Validation of Distributed Workloads: Exchange 2003 Pre-deployment Sizing Case Study, Journal of Computer Resource Management, Winter 2006 Edition [pdf].

S. Rosaria, E. Papaefstathiou, G. LaVigne, Pre-Deployment Sizing Made Easy: Exchange 2003 Case Study, 21st UKCMG Annual Conference, Warwick, UK, June 16-28, 2006.

D. Stewart, E. Papaefstathiou, and J. Hardwick, An Optimization Framework for Web Farm Configurations, 3rd ACM International Workshop on Software and Performance (WOSP 2002), Italy, Rome, July 2002.

J.C. Hardwick, E. Papaefstathiou, and D. Guimbellot, Modeling the Performance of E-Commerce Sites, Journal of Computer Resource Management, Winter 2002 Edition.

A.M. Alkindi, D.J. Kerbyson, G.R. Nudd, and E. Papaefstathiou, Optimisation of Application Execution on Dynamic Systems, Future Generation Computer Systems, Vol.17(8) (Elsevier Science), June 2001, pp. 941-949.

E. Papaefstathiou, Predicting Communication Bottlenecks, Dr. Dobbs Journal , April 2001, pp. 58-66. 

E. Papaefstathiou, Design of Performance Technology Infrastructure to Support the Construction of Responsive Software, in: Proc of 2nd ACM Inter. Workshop on Software and Performance (WOSP 2000), Ottawa, Canada, September 2000, pp. 96-104. 

D.J. Kerbyson, J.S. Harper, E. Papaefstathiou, G.R. Nudd, Use of Performance Technology for the Management of Distributed Systems, in: A. Bode, T. Ludwig, W. Karl, R. Wismller (eds.),  6th International Euro-Par Conference (Euro-Par 2000), Lecture Notes in Computer Science 1900, Springer Verlag, August 2000, pp.149-159.

G.R. Nudd, D.J. Kerbyson, E. Papaefstathiou, J.S. Harper, S.C. Perry, and D.V. Wilcox, PACE: A Toolset for the Performance Prediction of Parallel & Distributed Systems, in: International Journal of High Performance Computing Applications, Special Issue on Performance Engineered Systems, Vol 14 (4) (Sage Science Press), Fall 2000, pp. 228-251.

E. Papaefstathiou and D.J. Kerbyson, Predicting Communication Delays of Detailed Application Workloads, in: Proc. of ISCA 13th International Conference on Parallel and Distributed Computing Systems, Las Vegas, Nevada, August 8-10, 2000, pp. 131-138.

A.M. Alkindi, D.J. Kerbyson, E. Papaefstathiou, and G.R. Nudd, Optimising Application Execution Using Dynamic Performance Prediction, In: M. Bubak, H. Afsarmanesh, R. Williams, and B. Hertzberger (eds.), High Performance Computing and Networking (HPCN-2000) , Lecture Notes in Computer Science 1823, Springer Verlag, May 2000.

S.C. Perry, R.H. Grimwood, D.J. Kerbyson, E. Papaefstathiou, G.R. Nudd, Performance Optimization of Financial Option Calculations, Parallel Computing, Vol 26 (5), pp. 623-639, March 2000.

J. Cao, D.J. Kerbyson, E. Papaefstathiou, G.R. Nudd, Parallel and Distributed Computing Using PACE, in: IEEE International Performance Computing and Communications Conference (IPCCC-2000), Phoenix, USA, February 2000.

A. Veglis, A. Pombortsis, E. Papaefstathiou, Performance Evaluation of a Bus Based Multistage Multiprocessor Architecture, Journal of Systems Architecture, 46 (2000), pp. 39-47.

J. Cao, D.J. Kerbyson, E. Papaefstathiou, G.R. Nudd, Modelling of ASCI High Performance Applications using PACE, In: Proc. UK Performance Engineering Workshop (UKPEW'99), Bristol, pp. 413-424, July 1999.

G.R. Nudd, D.J. Kerbyson, E. Papaefstathiou, S.C. Perry, J.S. Harper, D.V. Wilcox, Use of Performance Technology for the Management of Distributed Systems, in: Proc. of EuroPar'99 Eurotools Workshop, Amsterdam, 1999.

D.J. Kerbyson, E. Papaefstathiou, and G.R. Nudd, Application Execution Steering Using On-the-fly Performance Prediction, In: P. Sloot, M. Bubak, and B. Hertzberger (eds.), High Performance Computing and Networking (HPCN-1998), Lecture Notes in Computer Science 1401, Springer Verlag, 1998.

D.J. Kerbyson, E. Papaefstathiou, J.S. Harper, S.C. Perry, and G.R. Nudd, Is Predictive Tracing Too Late for HPC Users?, In: R.J. Allan, A. Simpson, and D.A. Nicole (eds.), High Performance Computing, Plenum Press, 1998.

E. Papaefstathiou, D.J. Kerbyson, G.R. Nudd, J.S. Harper, S.C. Perry, and D.V. Wilcox, A Performance Analysis Environment for Life, in: 2nd ACM SIGMETRICS Symposium on Parallel and Distributed Tools, Oregon, USA (August 1998).

E. Papaefstathiou, D.J. Kerbyson, G.R. Nudd, D.V. Wilcox, J.S. Harper, S.C. Perry, A Common Workload Interface for Performance Prediction of High Performance Systems, in: Workshop on Performance Analysis and its Impact on Design (PAID98), Barcelona, Spain (June 1998).

E. Papaefstathiou, D.J. Kerbyson, G.R. Nudd, T.J. Atherton, A Mathematica pre-processor for performance analysis of parallel systems, in: V. Keranen and P. Mitic, eds., Mathematics with Vision, Southampton, U.K. (1995) pp. 283-290.

E. Papaefstathiou, D.J. Kerbyson, G.R. Nudd, T.J. Atherton, An overview of the CHIP3S performance prediction toolset for parallel systems, in: 8th ISCA Inter. Conf. on Parallel and Distributed Computing Systems, Florida, U.S.A. (1995) pp. 527-533.

E. Papaefstathiou, D.J. Kerbyson, and G.R. Nudd, A layered approach to parallel software performance prediction: A case study, in: L. Dekker, W. Smit, and J.C. Zuidervaart, eds., Massively Parallel Processing Applications and Development (North-Holland, Amsterdam, 1994).

M.J. Zemerly, D.J. Kerbyson, E. Papaefstathiou, R. Ziani, Y. Papay, T.J. Atherton, G.R. Nudd, Characterising computational kernels to predict performance on parallel systems, in: A.D. Gloria, M.R. Jane, and D. Marini, eds., Transputer Applications and Systems '94 (IOS Press, Amsterdam, 1994) 105-119.

A. Pombortsis, E. Papaefstathiou, A. Veglis, and G.R. Nudd, PASE: A performance analysis simulation environment, Simulation Practice and Theory (1994) 43-59.

 G.R. Nudd, T.J. Atherton, D.J. Kerbyson, C.T. Clarke, Y. Papay, E. Papaefstathiou, R. Ziani, J. Zemerly, Assessing the Performance of Parallel Computers - PEPS (ESPRIT 6942), In: Proc. of the 2nd Workshop on Abstract Machine Models for Highly Parallel Computers, University of Leeds, April 1993.

G.R. Nudd, T.J. Atherton, D.J. Kerbyson, E. Papaefstathiou, Y. Papay, M.J. Zemerly, R. Ziani, Parallel Computers: The Performance Quest, In: Proc of Developing Parallel Engineering Applications, SERC EASE, Abingdon, UK, pp. 29-32, February 1993.

M.J. Zemerly, E. Papaefstathiou, T.J. Atherton, D.J. Kerbyson, and G.R. Nudd, Characterising computational kernels: A case study, in: Proc. of the Performance Evaluation of Parallel Systems Workshop (PEPS 93), Coventry, U.K. (1993) 231-237.

G.R. Nudd, E. Papaefstathiou, Y. Papay, T.J. Atherton, C.T. Clarke, D.J. Kerbyson, A.F. Stratton, R.Ziani, and M.J. Zemerly, A layered approach to the characterisation of parallel systems for performance prediction, in: Proc. of the Performance Evaluation of Parallel Systems Workshop (PEPS 93), Coventry, U.K. (1993) 26-34.

A. Pombortsis and E. Papaefstathiou, A network simulator for parallel distributed processing systems, in: 2nd International Seminar on Teletraffic & Computer Modelling, Moscow, USSR (1989) 48-56.

A. Pombortsis and E. Papaefstathiou, ANISOL: A language to describe network topologies and processing environments in: Proc. of the 2nd Hellenic Conference of Informatics, Thessaloniki, Greece (1988) 269-291.

Theses, reports and deliverables

Technical Reports

E. Papaefstathiou, D.J. Kerbyson, G.R. Nudd, T.J. Atherton, J.S. Harper, An Introduction to the Layered Characterisation for High Performance Systems, Research Report RR335, Department of Computer Science, University of Warwick, December 1997.

E. Papaefstathiou, D.J. Kerbyson, G.R. Nudd, T.J. Atherton, An introduction to the CHIP3S language for characterising parallel systems in performance studies, Research Report 280, Department of Computer Science, University of Warwick, Coventry, U.K. (1995).

E. Papaefstathiou, D.J. Kerbyson, G.R. Nudd, and T.J. Atherton, An analysis of processor resource models for use in performance prediction, Research Report 279, Department of Computer Science, University of Warwick, Coventry, U.K. (1995).

M.J. Zemerly, E. Papaefstathiou, T.J. Atherton, D.J. Kerbyson, G.R. Nudd, Smart Integration: A Test Case Study, Research Report RR257, Department of Computer Science, University of Warwick, December 1993.

M.J. Zemerly and E. Papaefstathiou, Characterisation survey, Research Report 255, Department of Computer Science, University of Warwick, UK, 1993.

E. Papaefstathiou, Y. Papay, G.R. Nudd, T.J. Atherton, C.T. Clarke, D.J. Kerbyson, A.F. Stratton, R. Ziani, and M.J. Zemerly, A layered approach to modelling parallel systems for performance prediction, Research Report 247, Department of Computer Science, University of Warwick, U.K, 1993.

Project Reports

DARPA - Performance Technology (N66001-97-C-8530)

G.R. Nudd, D.J. Kerbyson, E. Papaefstathiou, J.S. Harper, S.C. Perry, A. Alkindi, Dynamic Optimisation, Task 2 Report, DARPA contract N66001-97-C-8530, May 1999.

G.R. Nudd, D.J. Kerbyson, E. Papaefstathiou, J.S. Harper, S.C. Perry, D.V. Wilcox, Development of Application Abstraction Formats for Complex Networks and Heterogeneous Systems, Task 1 Report, DARPA contract N66001-97-C-8530, November 1998.

Esprit Project 6942 (PEPS)

E. Papaefstathiou and D.J. Kerbyson, Characterising parallel systems focusing on re-usability, PEPS Bulletin (2) (1993) 5-6.

D.J. Kerbyson, E. Papaefstathiou, G.R. Nudd, T.J. Atherton, Evaluation of parallel operating systems and languages, ESPRIT Project 6942 (PEPS), Report 5.5, Department of Computer Science, University of Warwick, Coventry, U.K., 1995.

Y. Papay, D.J. Kerbyson, M.J Zemerly, E. Papaefstathiou, R. Ziani, T.J. Atherton, G.R. Nudd, Algorithmics / parallelisation of generics, ESPRIT Project 6942 (PEPS), Report 2.3, Department of Computer Science, University of Warwick, Coventry, U.K., 1994.

G.R. Nudd, T.J. Atherton, D.J. Kerbyson, C.T. Clarke, E. Papaefstathiou, Y. Papay, M.J. Zemerly, and R. Ziani, Characterisation of processing needs, ESPRIT Project 6942 (PEPS), Report 5.1, Department of Computer Science, University of Warwick, Coventry, U.K., 1993.

ESPRIT Project 6173 (DESIRE)

E. Papaefstathiou, Y. Papay, D.J. Kerbyson, and G.R. Nudd, Performance issues of parallel ray tracing software implemented on the Parsytec SuperCluster, ESPRIT Project 6173 (DESIRE), Report DEF 4-1, Warwick Strategic Technology Laboratories, Coventry, U.K., 1993.

E. Papaefstathiou, Y. Papay, D.J. Kerbyson, and G.R. Nudd, Benchmarking message passing interfaces (MPI) and virtual shared memory systems (VSM), ESPRIT Project 6173 (DESIRE), Report DEF 4-2, Warwick Strategic Technology Laboratories, Coventry, U.K., 1993.

Thesis & Senior Dissertations

E. Papaefstathiou, A Framework for Characterising Parallel Systems for Performance Evaluation, Ph.D. Thesis, Department of Computer Science, University of Warwick, Coventry, U.K. (1995).

E. Papaefstathiou, G. Contaxakis, D. Milonas, Bonaparte: A Distributed Operating Environment, Senior Dissertation, North College, Thessalioniki, Greece (1992).

E. Papaefstathiou, A simulation environment for distributed / parallel systems, Senior Dissertation, Digital Systems; Computers Lab., Physics Department, Thessaloniki, Greece, 1988.


Stathis Papaefstathiou's home page.


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