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Kalyan R S Perumalla

ORNL Joint Faculty Professor


Kalyan Perumalla is a Distinguished Research and Development Staff member and Manager at the Oak Ridge National Laboratory. Dr. Perumalla founded and currently leads the Discrete Computing Systems Group in the Computer Science and Mathematics Division at the Oak Ridge National Laboratory. He also serves as an Adjunct Professor in the School of Computational Sciences and Engineering at the Georgia Institute of Technology and as an ORNL Joint Professor in the Department of Industrial and Systems Engineering at the University of Tennessee, Knoxville.



He has published his research and delivered invited lectures and tutorials on topics spanning high performance computing and simulation. Some of his projects include:

  • DESGrid
  • DeepEx
  • CuPPA
  • MutEnt
  • CloneX
  • NetWarp
  • ReveR-SES
  • Rocks3D-HPC
  • Block-Tri
  • DRTI
  • REalSim
  • Grid-Viz
  • FDK
  • S3
  • TeD/GTW/Jane/PNNI


Dr. Perumalla earned his Ph.D. in computer science from the Georgia Institute of Technology in 1999. His areas of interest include reversible computing, high performance computing, parallel discrete event simulation, parallel combinatorial optimization, scalable machining learning and artificial intelligence implementations, and computer-based modeling and simulation of large-scale man-made systems such as transportation networks, energy grids and cyber physical systems. His notable research contributions are in the application of reversible computation to high performance computing and in advancing the vision of a new class of supercomputing applications using real-time, parallel discrete event simulations. High performance simulations spanning over 200,000 processor cores have been achieved by his algorithms and research prototypes on large supercomputing systems.

Awards and Recognitions

  • Award for Most Significant Technical Contribution in Past Five Years, Computer Science and Mathematics Division, 2017
  • DOE Early Career Award, $2.5 million for research and development by US Dept. of Energy Advanced Scientific computing Research, 2010-2015


  • National Academies of Science, Engineering and Medicine, "The 2015-2016 Assessment of the Army Research Laboratory, " Interim Report (contributor), February 2018.
  • Kalyan Perumalla and Vladimir Protopopescu, "Reversible Simulations of Elastic Collisions", ACM Transactions of Modeling and Computer Simulation (TOMACS), Vol. 23, No. 2, pages 12:1-12:25, 2013.

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