A stochastic performance model for the neutron diffusion nodal method on a multiuser parallel supercomputer

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6239872

Kirk, B L; Azmy, Y Y

In this paper, we discuss the performance of the neutron diffusion nodal method on a Cray Y-MP/8128 in a multiprocessing and multiuser mode. This computer has 8 processors with 128 million words of shared memory and a 6.0 nanosecond clock. Because of the speed and memory capabilities of the Cray Y-MP, the problem size (mesh size) of the test problem presented here is much larger (finer mesh) than those previously studied. Indeed, meshes as fine as the ones presented in this work are not unusual in practical reactor physics calculations. Our main concern here is construct a model for the CPU time in time-sharing mode required for solving a given problem. Performance models are useful tools in the planning and allocation of computational resources that is necessary in conducting large scale calculations.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/NE
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6239872
• Report Number(s): CONF-910414-3; ON: DE90017015
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220100* -- Nuclear Reactor Technology-- Theory & Calculation
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ARRAY PROCESSORS
COMPUTERS
CRAY COMPUTERS
DIFFERENTIAL EQUATIONS
EQUATIONS
NEUTRON DIFFUSION EQUATION
PARALLEL PROCESSING
PERFORMANCE
PROGRAMMING
STOCHASTIC PROCESSES