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One-sided communication and synchronization for non-coherent memory-coupled cores

机译:非相干内存耦合核心的单面通信和同步

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The trend towards the integration of many cores per chip will raise the demand for new many-core architectures if established multi-core techniques such as hardware implemented cache-coherence limit scalability. Parallel applications especially with dynamically changing access pattern can benefit from software supported weaker memory consistency models in combination with one-sided communication. The realization of one-sided communication through direct access of non-coherent shared memory requires flush operations and synchronization points. In this paper, we analyze the effect of low-overhead hardware-supported synchronization methods for shared memory windows with different memory models as described by the one-sided communication extensions of MPI-3. Moreover, we compare this approach with common message passing based implementation.
机译:如果建立的多核技术(如硬件实现缓存相干限制可扩展性),则每个芯片集成许多芯片的趋势将提高对新的多核架构的需求。 尤其是动态变化的访问模式的并行应用可以从软件中受益于支持较弱的内存一致性模型,结合单面通信。 通过直接访问非相干共享存储器的单面通信实现需要刷新操作和同步点。 在本文中,我们分析了利用MPI-3单面通信扩展的不同内存模型的共享存储器窗口的低开销硬件支持的同步方法的影响。 此外,我们将这种方法与基于传递的实现的通用消息进行比较。

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