Abstract A two-pronged effort to convert a recently developed ocean circulation model written in Fortran-77 for execution on massively parallel computers is described. A data-parallel version was developed for the CM-5 manufactured by Thinking Machines, Inc., while a message-passing version was developed for both the Cray T3D and the Silicon Graphics ONYX workstation. Since the time differentiation scheme in the ocean model is fully explicit and does not require solution of elliptic partial differential equations, adequate machine utilization has been achieved without major changes to the original algorithms. We developed a partitioning strategy for the message passing version that significantly reduces memory requirements and increases model speed. On a per-node basis (a T3D node is one Alpha processor, a CM-5 node is one Sparc chip and four vector units), the T3D and CM-5 are found to execute our “large” model version consisting of 511 × 511 horizontal mesh points at roughly the same speed.
[1]
Shahid H. Bokhari,et al.
A Partitioning Strategy for Nonuniform Problems on Multiprocessors
,
1987,
IEEE Transactions on Computers.
[2]
R. C. Malone,et al.
A Reformulation and Implementation of the Bryan-Cox-Semtner Ocean Model on the Connection Machine
,
1993
.
[3]
Rainer Bleck,et al.
Salinity-driven Thermocline Transients in a Wind- and Thermohaline-forced Isopycnic Coordinate Model of the North Atlantic
,
1992
.
[4]
Paul R. Woodward,et al.
The Fortran-P Translator: Towards Automatic Translation of Fortran 77 Programs for Massively Parallel Processors
,
1995,
Sci. Program..
[5]
M. O'Keefe,et al.
The Design , Implementation , and Performance of a Parallel Ocean Circulation Model
,
1994
.