A study of application sensitivity to variation in message passing latency and bandwidth
- Oak Ridge National Lab., TN (United States)
- Sandia National Labs, Albuquerque, NM (United States)
- Intel Corp., Beaverton, OR (United States)
This study measures the effects of changes in message latency and bandwidth for production-level codes on a current generation tightly coupled MPP, the Intel Paragon. Messages are sent multiple times to study the application sensitivity to variations in band - width and latency. This method preserves the effects of contention on the interconnection network. Two applications are studied, PCTH, a shock physics code developed at Sandia National Laboratories, and PSTSWM, a spectral shallow water code developed at Oak Ridge National Laboratory and Argonne National Laboratory. These codes are significant in that PCTH is a {open_quote}full physics{close_quotes} application code in production use, while PSTSWM serves as a parallel algorithm test bed and benchmark for production codes used in atmospheric modeling. They are also significant in that the message-passing behavior differs significantly between the two codes, each representing an important class of scientific message-passing applications.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-96OR22464
- OSTI ID:
- 279676
- Report Number(s):
- ORNL/TM-13250; ON: DE96014269; TRN: 96:004875
- Resource Relation:
- Other Information: PBD: Jun 1996
- Country of Publication:
- United States
- Language:
- English
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