A killer micro attack on 3D neutron transport
In this paper, we describe the deterministic solution of the neutron transport equation and the computation of the effective criticality of three-dimensional assemblies using the BBN TC2000 killer micros. We observe that the performance of our research code PTRAN running on 48 processors of the TC2000 is competitive with the partially vectorizable version running on a single Cray Y/MP processor. This performance scales well with the number of processors on real problems, including those that are not load balanced a priori. To obtain this performance, we explicitly specify and exploit data locality and data dependence using domain decomposition and dynamic job scheduling. From the results obtained here, it appears that, at least for this application, a production machine based on the TC2000 architecture with more powerful processors and a commensurate increase in switch speed could yield a significant gain in our design capability. 2 refs., 5 figs., 2 tabs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- Sponsoring Organization:
- DOE/DP
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6040177
- Report Number(s):
- UCRL-JC-105542; CONF-9011149-12; ON: DE91008503
- Resource Relation:
- Conference: 1990 nuclear explosives code developers' conference, Monterey, CA (USA), 6-9 Nov 1990
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
NEUTRON TRANSPORT
PARALLEL PROCESSING
ARRAY PROCESSORS
PERFORMANCE TESTING
THREE-DIMENSIONAL CALCULATIONS
NEUTRAL-PARTICLE TRANSPORT
PROGRAMMING
RADIATION TRANSPORT
TESTING
654003* - Radiation & Shielding Physics- Neutron Interactions with Matter
990200 - Mathematics & Computers
450200 - Military Technology
Weaponry
& National Defense- Nuclear Explosions & Explosives