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Programming Petascale Applications with Charm++ and AMPI
Petascale Computing: Algorithms and Applications 2007
Publication Type: Paper
Repository URL: 2007_CharmPetaBook
In this chapter, we presented features of Charm++ and adaptive MPI, programming methodologies that we believe are well-suited for programming petascale machines. They provide a programming model that is independent of the number of processors, automate resource management, and support concurrent composition. Several full-scale applications developed using Charm++ were shown to have scaled to tens of thousands of processors, in spite of their irregular and dynamic nature. The adaptive runtime system at the heart of Charm++ can be used for supporting multiple programming models, as well as enabling interoperability among modules developed using them. Charm++ has attained a degree of success less common among academically developed programming models: e.g., 15-20% of the CPU cycles at two national centers (National Computational Science Alliance (NCSA) and Pittsburgh Supercomputing Center (PSC)) during a one-year period were spent on Charm++ applications, mainly NAMD. It is a mature, stable programming system, with mature performance analysis tools. Thus, it should not be dismissed as just an experimental system, but rather be accepted as a mainstream model that can have an impact on the state of the art in parallel computing. We hope that the next generation of applications being developed using Charm++ will further cement its place as one of the significant models for parallel programming.
Laxmikant V. Kale, Eric Bohm, Celso L. Mendes, Terry Wilmarth and Gengbin Zheng. Programming Petascale Applications with Charm++ and AMPI. In Petascale Computing: Algorithms and Applications, pg 421-441, Chapman & Hall / CRC Press, ed D Bader, 2004.
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