BCL: A Border-based Coordination Language

摘要

In this paper we present BCL, a Border-based Coordination Language for the solution of numerical problems, especially those with an irregular surface that can be decomposed into regular, block structured domains. Using this language, the coordination issues of an application can be clearly separated from the numerical methods, increasing the reusability of both the computational and coordination codes. In the coordination part, the different blocks that form the global domain of the problem and the borders among those blocks are defined, including the way these borders are updated. All the coordination aspects are completely written in BCL. The computational part can be written in Fortran or HPF together with only a few BCL extensions. On the other hand, the integration of task and data parallelism is achieved, exploiting two levels of parallelism: among domains and within them. In addition, BCL implementation requires no change to the runtime system support of the HPF compiler used.