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Scalability study of parallel spatial direct numerical simulation code on ibm sp1 parallel supercomputer
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Joslin, Ronald D. Zubair, Mohammad Hanebutte, Ulf R. |
| Copyright Year | 1994 |
| Description | The implementation and the performance of a parallel spatial direct numerical simulation (PSDNS) code are reported for the IBM SP1 supercomputer. The spatially evolving disturbances that are associated with laminar-to-turbulent in three-dimensional boundary-layer flows are computed with the PS-DNS code. By remapping the distributed data structure during the course of the calculation, optimized serial library routines can be utilized that substantially increase the computational performance. Although the remapping incurs a high communication penalty, the parallel efficiency of the code remains above 40% for all performed calculations. By using appropriate compile options and optimized library routines, the serial code achieves 52-56 Mflops on a single node of the SP1 (45% of theoretical peak performance). The actual performance of the PSDNS code on the SP1 is evaluated with a 'real world' simulation that consists of 1.7 million grid points. One time step of this simulation is calculated on eight nodes of the SP1 in the same time as required by a Cray Y/MP for the same simulation. The scalability information provides estimated computational costs that match the actual costs relative to changes in the number of grid points. |
| File Size | 1149355 |
| Page Count | 24 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19950012169 |
| Archival Resource Key | ark:/13960/t86h9gs7x |
| Language | English |
| Publisher Date | 1994-08-01 |
| Access Restriction | Open |
| Subject Keyword | Computer Programming And Software Computer Systems Performance Data Structures Supercomputers Computerized Simulation Parallel Processing Computers Computer Programs Distributed Processing Three Dimensional Flow Subroutine Libraries Computers Parallel Computers Computational Grids Grid Generation Mathematics Cost Analysis Transmission Efficiency Boundary Layer Flow Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
