Parallel performance of TORT on the CRAY J90: Model and measurement
Conference
·
OSTI ID:319792
- Lockheed Martin Corp., Schenectady, NY (United States)
- Oak Ridge National Lab., TN (United States)
A limitation on the parallel performance of TORT on the CRAY J90 is the amount of extra work introduced by the multitasking algorithm itself. The extra work beyond that of the serial version of the code, called overhead, arises from the synchronization of the parallel tasks and the accumulation of results by the master task. The goal of recent updates to TORT was to reduce the time consumed by these activities. To help understand which components of the multitasking algorithm contribute significantly to the overhead, a parallel performance model was constructed and compared to measurements of actual timings of the code.
- Research Organization:
- Knolls Atomic Power Lab., Schenectady, NY (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Nuclear Energy, Washington, DC (United States)
- DOE Contract Number:
- AC12-76SN00052
- OSTI ID:
- 319792
- Report Number(s):
- KAPL-P--000199; K--97141; CONF-981003--; ON: DE99001977
- Country of Publication:
- United States
- Language:
- English
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