Accelerating execution of the integrated TIGER series Monte Carlo radiation transport codes

Journal Article · Sat Feb 01 00:00:00 EST 1997 · IEEE Transactions on Nuclear Science

DOI:https://doi.org/10.1109/23.554821· OSTI ID:452161

Smith, L M; Hochstedler, R D ^[1]

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1. Univ of Tennessee Space Inst., Tullahoma, TN (United States). Dept. of Electrical Engineering

Execution of the integrated TIGER series (ITS) of coupled electron/photon Monte Carlo radiation transport codes has been accelerated by modifying the FORTRAN source code for more efficient computation. Each member code of ITS was benchmarked and profiled with a specific test case that directed the acceleration effort toward the most computationally intensive subroutines. Techniques for accelerating these subroutines included replacing linear search algorithms with binary versions, replacing the pseudo-random number generator, reducing program memory allocation, and proofing the input files for geometrical redundancies. All techniques produced identical or statistically similar results to the original code. Final benchmark timing of the accelerated code resulted in speed-up factors of 2.00 for TIGER (the one-dimensional slab geometry code), 1.74 for CYLTRAN (the two-dimensional cylindrical geometry code), and 1.90 for ACCEPT (the arbitrary three-dimensional geometry code).

• OSTI ID: 452161
• Journal Information: IEEE Transactions on Nuclear Science, Vol. 44, Issue 1; Other Information: PBD: Feb 1997
• Country of Publication: United States
• Language: English

Related Subjects

99 MATHEMATICS
COMPUTERS
INFORMATION SCIENCE
MANAGEMENT
LAW
MISCELLANEOUS
66 PHYSICS
RADIATION TRANSPORT
COMPUTER CODES
MONTE CARLO METHOD
PERFORMANCE
BENCHMARKS
COMPUTER CALCULATIONS
TIME DEPENDENCE