Dr Gihan Mudalige

Research Associate

01865 610787

Dr. Gihan Mudalige is a research associate working on the  OP2 and OPS projects under  Prof. Mike Giles .  His research interests include high performance computing targeting performance analysis and optimisation of scientific applications on multi-core/many-core architectures.  Current and recent research collaborations include projects with Rolls-Royce Plc, UK MOD, Imperial College London, University of Bristol, University of Southampton, STFC and others. 

Selected Publications 

  • I. Z. Reguly, E. László, G.R. Mudalige, and M.B. Giles. (2015Vectorizing unstructured mesh computations for many-core architecturesConcurrency Computat.: Pract. Exper., doi:10.1002/cpe.3621.
  • I. Z. Reguly, G. R. Mudalige, C. Bertolli, M. B. Giles, A. Betts, P. H. J. Kelly, and D. Radford. Acceleration of a Full-scale Industrial CFD Application with OP2(2015) IEEE Transactions on Parallel and Distributed Systems PrePrints, doi:10.1109/TPDS.2015.2453972 (arxiv) (data)
  • S.P.Jammy, N.D.Sandham, G.R. Mudalige, I.Z.Reguly, M.B. Giles. Block Structured Compressible Navier Stokes Solution Using the OPs High-Level abstraction,  27th International Conference on Parallel CFD, May 2015, Montreal, Canada
  • G.R. Mudalige, I. Reguly, M. Giles, A. Mallinson, W. Gaudin, and J. Herdman, High Performance Computing Systems. Performance Modeling, Benchmarking, and Simulation. 5th International Workshop, PMBS 2014, Held in conjunction with IEEE/ACM Supercomputing 2014(SC'14) New Orleans, LA, USA, November 16, 2014. Revised Selected Papers. Springer, 2015, vol. 8966, no. 1, ch. Performance Analysis of a High-level Abstractions-based Hydrocode on Future Computing Systems, pp. 85–104. ISBN 978-3-319-17248-4 (pre-print PDF)
  • I.Z. Reguly, G.R. Mudalige, M.B. Giles, D. Curran and S. McIntosh-Smith, "The OPS Domain Specific Abstraction for Multi-Block Structured Grid Computations". To appear in Proceedings of the 4th international workshop on Domain-Specific Languages and High-Level Frameworks for High Performance Computing(WOLFHPC '14).Held in conjunction with IEEE/ACM Supercomputing 2014(SC'14). (pre-print PDF
  • I.Z Reguly, E. Laszlo, G.R. Mudalige , M.B Giles, Vectorizing Unstructured Mesh Computations for Many-core Architectures , PMAM’14, Proceedings of Programming Models and Applications on Multicores and Manycores, February 2014 ( online ) (pre-print PDF)
  • G.R. Mudalige , M.B. Giles, J. Thiyagalingam, I. Reguly, C. Bertolli, P.H.J. Kelly and A.E. Trefethen,  Design and Initial Performance of a High-level Unstructured Mesh Framework on Heterogeneous Parallel Systems.  Parallel Comput.(2013) http://dx.doi.org/10.1016/j.parco.2013.09.004 ( online ) ( PDF )
  • C. Bertolli, A. Betts, N. Loriant, G.R. Mudalige , D. Radford, D.A. Ham, M.B. Giles, and P.H.J. Kelly. Compiler Optimizations for Industrial Unstructured Mesh CFD Applications on GPUs , Languages and Compilers for Parallel Computing, pp.112-126, Springer, 2013. (PDF)
  • M.B. Giles,  G.R. Mudalige , C. Bertolli, P.H.J. Kelly, E. Laszlo, and I. Reguly,  An Analytical Study of Loop Tiling for a Large-Scale Unstructured Mesh Application . SC Companion 2012: 477-482. ( PDF )
  • M.B. Giles,  G.R. Mudalige , B. Spencer, C. Bertolli, I. Reguly,  Designing OP2 for GPU architectures , Journal of Parallel and Distributed Computing, Volume 73, Issue 11, November 2013, Pages 1451-1460, ISSN 0743-7315. ( PDF ) (pre-print PDF)
  • G.R. Mudalige , I. Reguly, M.B. Giles, C. Bertolli and P.H.J. Kelly.  OP2: An Active Library Framework for Solving Unstructured Mesh-based Applications on Multi-Core and Many-Core Architectures.  In Proceedings of Innovative Parallel Computing (InPar), 2012,  pp.1-12, 13-14 May 2012. ( PDF )
  • G.R. Mudalige , M.B. Giles, C. Bertolli, and P.H.J. Kelly.  Predictive Modeling and Analysis of OP2 on Distributed Memory GPU Clusters . SIGMETRICS Perform. Eval. Rev. 40, 2 :61-67 (2012). ( PDF )
  • G.R. Mudalige , M.B. Giles, C. Bertolli, and P.H.J. Kelly. 2011.  Predictive Modeling and analysis of OP2 on distributed memory GPU clusters . In Proceedings of the second international workshop on Performance Modeling, Benchmarking and Simulation of High Performance Computing Systems (PMBS '11). ACM, New York, NY, USA, 3-4. Held in conjunction with IEEE/ACM Supercomputing 2011 (SC'11), Seattle, WA, USA
  • M.B. Giles,  G.R. Mudalige , Z. Sharif, G. Markall, P.H.J. Kelly.  Performance Analysis and Optimization of the OP2 Framework on Many-core Architectures (2012) Computer Journal, 55 (2), pp. 168-180.  ISSN 0010-4620.( PDF ) (pre-print PDF)
  • S.J. Pennycook,  S.D.  Hammond,  G.R.  Mudalige  S.A.  Wright,  and  S.A. Jarvis,   On the Acceleration of Wavefront Applications Using Distributed Many-core Architectures  (2012) Computer Journal, 55 (2), pp. 138-153. ISSN 0010-4620
  • C. Bertolli, A. Betts, G.R. Mudalige , M.B. Giles, P.H.J. Kelly. Design and Performance of the OP2 Library for Unstructured Mesh Applications , Euro-Par 2011 Parallel Processing Workshops, Lecture Notes in Computer Science, Springer, 2012. ( PDF )
  • C. Bertolli, A. Betts, P.H.J. Kelly, G.R. Mudalige , and M.B. Giles. Mesh Independent Loop Fusion for Unstructured Mesh Applications in Proceedings of the 9th Conference on Computing Frontiers (CF ’12). pp.43-52 ACM, 2012. ( PDF )
  • J.A. Davis,  G.R. Mudalige , S.D. Hammond, J.A. Herdman, I. Miller, S.A. Jarvis. (2011)  Predictive Analysis of a Hydrodynamics Application on Large-Scale CMP Clusters . In: International Supercomputing Conference (ISC11). Lecture Notes in Computer Science (R&D), 26 (3-4). Springer, Hamburg, Germany, pp. 175-185.
  • M.B. Giles,  G.R. Mudalige , Z. Sharif, G. Markall, P.H.J Kelly.  Performance Analysis of the OP2 Framework on Many-core Architectures . (2011).  ACM SIGMETRICS Perform. Eval. Rev. 38 (4) ISSN 0163-5999.  ( PDF )
  • S.J. Pennycook,  S.D. Hammond, S.A. Jarvis and  G.R. Mudalige.  (2011)  Performance Analysis of a Hybrid MPI/CUDA Implementation of the NAS-LU Benchmark.  ACM SIGMETRICS Perform. Eval. Rev. 38 (4). ISSN 0163-5999 ( PDF )
  • S.D. Hammond,  G.R. Mudalige , J.A. Smith, S.A. Jarvis, J. Holt, I. Miller, J.A Herdman and A. Vadgama,  To Upgrade or not to Upgrade? Catamount vs. Cray Linux Environment , Large Scale Parallel Processing (LSPP) held in conjunction with IPDPS10, April, 2010, Atlanta, USA ( PDF )
  • G.R. Mudalige , S.D. Hammond, J.A. Smith, and S.A. Jarvis.  Predictive Analysis and Optimisation of Pipelined Wavefront Computations . In Proc. 11th Workshop on Advances in Parallel and Distributed Computational Models (APDCM 2009), 23rd IEEE International Parallel and Distributed Processing Symposium (IPDPS 2009), Rome, Italy, May 2009. IEEE Computer Society. ( PDF )
  • S.D. Hammond,  G.R. Mudalige , J.A. Smith, A.B. Mills, S.A. Jarvis, J. Holt, I. Miller, J.A. Herdman and A. Vadgama. Performance Prediction and Procurement in Practise: Assessing the Suitability of Commodity Cluster Components for Wavefront Codes,  IET Softw (3)6:509-521. 2009. ( PDF )
  • S.D. Hammond,  G.R. Mudalige , J.A. Smith, S.A. Jarvis, J.A. Herdman and A. Vadgama, WARPP: A Toolkit for Simulating High Performance Parallel Scientific Codes , 2nd International Conference on Simulation Tools and Techniques (SIMUTools 2009 (ACM SIGSIM, ICST, SCS)), March, 2009, Rome, Italy. ( PDF )
  • G.R.Mudalige , M. K. Vernon and S. A. Jarvis.  A Plug-and-Play Model for Evaluating Wavefront Computations on Parallel Architectures,  IEEE International Parallel and Distributed Processing Symposium (IPDPS 2008),  Miami, Florida USA, April 2008. IEEE Computer Society. ( PDF)
  • G.R.Mudalige , S. A. Jarvis, D.P. Spooner and G.R. Nudd  Predictive Performance Analysis of a Parallel Pipelined Synchronous Wavefront Application for Commodity Processor Cluster Systems,  IEEE International Conference on Cluster Computing, Barcelona Sept 2006. IEEE Computer Society. ( PDF )
  • S. A. Jarvis, D.P. Spooner,  G.R.Mudalige , B.P. Foley, J. Cao and G.R. Nudd.  Performance Evaluation of Parallel and Distributed Systems.  chapter in Performance Prediction Techniques for Large-scale Distributed Environments. Mohamed Ould-Khaoua and Geyong Min Eds. Nova Science, 2005


Research Grants

  • Researcher Co-investigator  (July 2013 - July 2016) - Future-proof Massively-Parallel Execution of Multi-block Applications. Funded by the UK EPSRC (Ref:  EP/K038494/1 ) with  Prof. M.B. Giles  (PI) 

Researcher Profiles

  • ResearchGate
  • Scopus Author Profile
  • Google Scholar
  • ORCID Profile
  • DBLP


  • Post-Doctoral Research Fellow at the  University of Warwick  (2009-2010),  Dept. of Computer Science.
  • PhD in Computer Science from  University of Warwick  (thesis title: Predictive Analysis and Optimisation of Pipelined Wavefront Applications using Reusable Analytic Models pdf.jpg ), supervised by  Prof. Stephen A. Jarvis  (2004-2009)
  • Research intern at the  University of Wisconsin-Madison  (U.S)  Dept. of Computer Science  working with   Prof. Mary K. Vernon  as part of the Warwick, Wisconsin-Madison graduate exchange  program (2006-2007).

Professional Affiliations and Activities

  • Member ACM: Member of the  Association for Computing Machinery (ACM)  
  • Reviewer:  IPDPS (2009) ,  MASCOTS (2009) ,  Euro-Par (2010) , UKPEW ( 2008 ,  2009  and  2010 ), JPDC (2011), Computer Journal (2011 to 2014)