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Impact of Half-Duplex and Full-Duplex DMA Implementations on NoC Performance

机译:半双工和全双工DMA实现对NoC性能的影响

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NoCs performance are usually explored stand-alone, overlooking the impact of the higher communication levels in the ISO OSI micro network stack. Nevertheless, since CPUs have to be relieved of communication management, higher communication levels such as DMA engines necessarily influence the communication performance. In this paper, we investigate how two different DMA implementations, full-duplex and half-duplex, can bias the behavior of a NoC designed for MPP architectures. From our studies, it turned out that a full-duplex DMA is more effective in preventing possible deadlock situations. Moreover, a deep performance analysis of a state-of-the-art NoC, in terms of transactions completion time, queuing time and injection delay, confirms the impact of the DMA in NoC-based MPP platforms, showing the advantages of a full-duplex approach.
机译:通常独立研究NoC的性能,而忽略了ISO OSI微型网络堆栈中较高的通信级别的影响。但是,由于必须减轻CPU的通信管理负担,因此较高的通信级别(例如DMA引擎)必定会影响通信性能。在本文中,我们研究了两种不同的DMA实现方式(全双工和半双工)如何偏向为MPP架构设计的NoC的行为。从我们的研究中可以看出,全双工DMA可以更有效地防止可能出现的死锁情况。此外,从交易完成时间,排队时间和注入延迟等方面对最先进的NoC进行深入的性能分析,证实了DMA在基于NoC的MPP平台中的影响,显示了全功能的优势。双工方法。

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