In this paper, we propose a dataflow-based massively parallel programming language, called V, which is loosely based on a data-flow oriented functional programming language. The language provides a programming unit, or agent, to write parallel entities communicating with each other. In addition, we can connect agents explicitly and abstract an ensemble of agents on a predefined topology description in order to write a massively parallel program that naturally reflects the structure of a problem. We also present some implementation issues and a preliminary evaluation of our compiler and runtime system developed for the Fujitsu AP1000, a distributed-memory parallel machine with conventional processors.
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