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To harness the potential of CMPs for scalable, energy-efficient performance in general-purpose computers, the Apple-CORE project has co-designed a general machine model and concurrency control interface with dedicated hardware support for concurrency management across multiple cores. Its SVP interface combines dataflow synchronisation with imperative programming, towards the efficient use of parallelism in general-purpose workloads. Its implementation in hardware provides logic able to coordinate single-issue, in-order multi-threaded RISC cores into computation clusters on chip, called Microgrids. In contrast with the traditional “accelerator” approach, Microgrids are components in distributed systems on chip that consider both clusters of small cores and optional, larger sequential cores as system services shared between applications. The key aspects of the design are asynchrony, i.e. the ability to …