434.zeusmp
SPEC CPU2006 Benchmark Description

Benchmark Name

434.zeusmp

Benchmark Author

Michael Norman <mnorman [at] cosmos.ucsd.edu>
Department of Physics
University of California, San Diego
San Diego
California
USA

Benchmark Program General Category

Physics / Magnetohydrodynamics

Benchmark Description

434.zeusmp is based on ZEUS-MP, a computational fluid dynamics code developed at the Laboratory for Computational Astrophysics (NCSA, University of Illinois at Urbana-Champaign) for the simulation of astrophysical phenomena. ZEUS-MP solves problems in three spatial dimensions with a wide variety of boundary conditions.

The program solves the equations of ideal (non-resistive), non-relativistic, hydrodynamics and magnetohydrodynamics, including externally applied gravitational fields and self-gravity. The gas can be adiabatic or isothermal, and the thermal pressure is isotropic. Boundary conditions may be specified as reflecting, periodic, inflow, or outflow.

The physical problem solved in SPEC CPU2006 is a 3-D blastwave simulated with the presence of a uniform magnetic field along the x-direction. A Cartesian grid is used and the boundaries are "outflow."

The original ZEUS-MP is based on ZEUS-3D and parallelized using the MPI message-passing library; for SPEC CPU2006, the MPI calls have been removed to create the single processor version 434.zeusmp.

Input Description

The input file zmp_inp contains many parameters from which the problem is built, among them:

mpitop
The spatial arrangement of processors (irrelevant for CPU2006).
rescon
Restart control which is irrelevant in this test.
pcon
Problem control with the limits on number of steps (nlim) system time (tlim) and CPU time (cpulim).
hycon
Physical constants related to the hydrodynamical problem
iib ~ okb
Boundary conditions at the 6 boundaries.
ggen1~3
Grid information.
grvcon
Gravitation control which is irrelevant in this test.
radcon
Radiation control which is irrelevant in this test.
radexp
Radiative diffusion control which is irrelevant in this test.
eqos
Information on Equation of State.
pgen
Problem generator control information. In this test, it is a spherical blastwave with radius r=0.2 and located at the origin. The ambient density d0=1 and the ambient pressure is 0.6. The initial blastwave has density 100 times and pressure of 1 million times of the surrounding. B-field is in the x-direction (b10=140).
gcon
Moving grid control which is irrelevant in this test.
iocon
I/O control. Physical information of the blastwave test will ouput at the end of the run.

Output Description

The output file "tsl000aa" contains physical information of the blastwave at the beginning and the end of the run. This file is used for validation.

Programming Language

The main code is written in Fortran 77, with the change that (as in all of SPEC's Fortran benchmarks) the type

DOUBLE PRECISION

has been replaced by

REAL*8

thus making the size of the relevant floating-point data uniform across systems - an important consideration for fair benchmarking. While the type REAL*8 is not part of the strict Fortran 77 or Fortran 90 standards, it is a common language extension recognized by all Fortran compilers the SPEC CPU subcomittee has used in its tests.

Known portability issues

None

References

http://lca.ucsd.edu/portal/software/zeus-mp2

Last updated: $Date: 2011-08-16 18:23:17 -0400 (Tue, 16 Aug 2011) $