Computational load in model physics of the parallel NCAR community climate model

Technical Report · Tue Nov 01 00:00:00 EST 1994

DOI:https://doi.org/10.2172/10108001· OSTI ID:10108001

Michalakes, J G; Nanjundiah, R S

Maintaining a balance of computational load over processors is a crucial issue in parallel computing. For efficient parallel implementation, complex codes such as climate models need to be analyzed for load imbalances. In the present study we focus on the load imbalances in the physics portion of the community climate model`s (CCM2) distributed-memory parallel implementation on the Intel Touchstone DELTA computer. We note that the major source of load imbalance is the diurnal variation in the computation of solar radiation. Convective weather patterns also cause some load imbalance. Land-ocean contrast is seen to have little effect on computational load in the present version of the model.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10108001
• Report Number(s): ANL/MCS-TM-186; ON: DE95005410; TRN: 95:001053
• Resource Relation: Other Information: PBD: Nov 1994
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
CLIMATE MODELS
PARALLEL PROCESSING
COMPUTER CALCULATIONS
SOLAR RADIATION
WEATHER
AIR-BIOSPHERE INTERACTIONS
540110
990200
BASIC STUDIES
MATHEMATICS AND COMPUTERS