NERSCPowering Scientific Discovery Since 1974

Christopher Daley

Christopher Steven Daley
HPC Performance Engineer
Advanced Technology Group
Phone: +1 510 486 4504
Fax: +1 510 486 4316
National Energy Research Scientific Computing Center
Oakland Scientific Facility (OSF) at 415 20th Street
Room 269. Mail stop: 943R0256
Oakland, California 94612 US

Biographical Sketch

Chris Daley is a member of the Advanced Technology Group (ATG).  Before joining ATG, Chris was a Scientific Programmer at the Flash Center for Computational Science at the University of Chicago.  He has a M.Sc. in High Performance Computing from the University of Edinburgh and a B.Sc. in Physics from the University of Surrey.

Journal Articles

Jack Deslippe, Brian Austin, Chris Daley, Woo-Sun Yang, "Lessons learned from optimizing science kernels for Intel's "Knights-Corner" architecture", CISE, April 1, 2015,

A. Dubey, K. Antypas, A. C. Calder, C. Daley, B. Fryxell, J. B. Gallagher, D. Q. Lamb, D. Lee, K. Olson, L. B. Reid, P. Rich, P. M. Ricker, K. M. Riley, R. Rosner, A. Siegel, N. T. Taylor, K. Weide, F. X. Timmes, N. Vladimirova, and J. ZuHone, "Evolution of FLASH, a multi-physics scientific simulation code for high-performance computing", International Journal of High Performance Computing Applications, May 2014, doi: 10.1177/1094342013505656

A. Dubey, K. Weide, D. Lee, J. Bachan, C. Daley, S. Olofin, N. Taylor, P. M. Rich, and L. B. Reid, "Ongoing verification of a multiphysics community code: FLASH", Software: Practice and Experience, September 2013, doi: 10.1002/spe.2220

A. Dubey, A. Calder, C. Daley, C., R. Fisher, Jordan, D.Q. Lamb, L.B. Reid, D.M. Townsley, K. Weide, "Pragmatic Optimizations for Best Scientific Utilization of Large Supercomputers", International Journal of High Performance Computing Applications, July 2013, doi: 10.1177/1094342012464404

A. Dubey, C. Daley, J. ZuHone, P. M. Ricker, K. Weide, C. Graziani, "Imposing a Lagrangian Particle Framework on an Eulerian Hydrodynamics Infrastructure in FLASH", The Astrophysical Journal Supplements, 2012, 201:27, doi: 10.1088/0067-0049/201/2/27

C. Daley, M. Vanella, K. Weide, A. Dubey, E. Balaras, "Optimization of Multigrid Based Elliptic Solver for Large Scale Simulations the FLASH Code", Concurrency and Computation: Practice and Experience, 2012, 24:2346--2361, doi: 10.1002/cpe.2821

R. Latham, C. Daley, W.K. Liao, K. Gao, R. Ross, A. Dubey, A. Choudhary, "A case study for scientific I/O: improving the FLASH astrophysics code", Computational Science and Discovery, 2012, 5:015001, doi: 10.1088/1749-4699/5/1/015002

D. Lee, G. Xia, C. Daley, A. Dubey, S., C. Graziani, D.Q. Lamb, K. Weide, "Progress in development of HEDP capabilities in FLASH's Unsplit Staggered Mesh MHD solver", Astrophysics and Space Science, 2011, 336:157-162, doi: 10.1007/s10509-011-0654-5

B. R. de Supinski, S. Alam, D. H. Bailey, L., C. Daley, A. Dubey, T., D. Gunter, P. D. Hovland, H., K. Karavanic, G. Marin, J., S. Moore, B. Norris, L., C. Olschanowsky, P. C. Roth, M., S. Shende, A. Snavely, Spear, M. Tikir, J. Vetter, P. Worley, N. Wright, "Modeling the Office of Science ten year facilities plan: The PERI Architecture Tiger Team", Journal of Physics: Conference Series, 2009, 180:012039,

Conference Papers

M. J. Cordery, B. Austin, H. J. Wasserman, C. S. Daley, N. J. Wright, S. D. Hammond, D. Doerfler, "Analysis of Cray XC30 Performance using Trinity-NERSC-8 benchmarks and comparison with Cray XE6 and IBM BG/Q", SC'13, November 11, 2013,

P. Mohapatra, A Dubey, C. Daley, M. Vanella, and E. Balaras, "Parallel Algorithms for Using Lagrangian Markers in Immersed Boundary Method with Adaptive Mesh Refinement in FLASH", Computer Architecture and High Performance Computing (SBAC-PAD), October 2013, doi: 10.1109/SBAC-PAD.2013.27

C. Daley, J. Bachan, S. Couch, A. Dubey, M., B. Gallagher, D. Lee, K. Weide, "Adding shared memory parallelism to FLASH for many-core architectures", TACC-Intel Highly Parallel Computing Symposium, 2012,

V. Vishwanath, M. Hereld, M. E. Papka, R. Hudson, G. Jordan, C. Daley, "In Situ Data Analytics and I/O Acceleration of FLASH simulations on leadership-class systems with GLEAN", SciDAC, Journal of Physics: Conference Series, 2011,

A. Dubey, C. Daley, K. Weide, "Challenges of Computing with FLASH on Largest HPC Platforms", AIP Conference Proceedings, 2010, 1281:1773, doi:


C. Daley, Preparing for Mira: experience with FLASH multiphysics simulations, Mira Community Conference, 2013,