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This paper reports our efforts on refactoring and optimizing the Community Atmosphere Model (CAM) on the Sunway TaihuLight supercomputer, which uses a many-core processor that consists of management processing elements (MPEs) and clusters of computing processing elements (CPEs). To map the large code base of CAM to the millions of cores on the Sunway system, we take OpenACC-based refactoring as the...
With the innovation of IBM POWER processors as well as the rapid development of OpenPOWER league, a part of future supercomputers in 100P level would adopt POWER as CPU processors. As hardware features of POWER8 have been studied in these years, the lack of tuning guidelines indicates a gap between software performance and hardware capabilities. To fully evaluate the POWER8 processor and provide tuning...
As a traditional application on various supercomputers, atmospheric modeling has long been suffering from the low performance efficiency. In this paper, we pick the 3D Euler equation solver (the most essential dynamic component for a non-hydrostatic atmospheric model) as the target application, and explore the maximum performance efficiency that can be achieved on CPU-GPU hybrid architectures. Besides...
In this paper we choose the widely used Jacobi stencil algorithm as our target program to evaluate the effectiveness of tuning techniques based on the latest POWER8 processor, thus to provide optimization guidelines to similar stencil based algorithms.
Scientific HPC applications are increasingly ported to GPUs to benefit from both the high throughput and the powerful computing capacity. Many of these applications, such as atmospheric modeling and hydraulic erosion simulation, are adopting the finite volume method (FVM) as the solver algorithm. However, the communication components inside these applications generally lead to a low flop-to-byte ratio...
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