将相变存储器(PCRAM)作为流处理器Imagine的主存储器,对共性能进行优化.建立(PCRAM)性能分析模型,针对PCRAM可写次数有限的缺陷,采用避免冗余位写技术,使PCRAM的生命周期延长3.4倍.利用PCRAM的非易失性,避免不必要的缓存行写回.分析访存调度算法对PCRAM性能的影响,结果表明,row/open调度算法性能较优,适合PCRAM使用.%This paper uses the Phase Change RAM(PCRAM) as the main memory of Imagine stream processor, studies the performance optimization of it. It builds the performance analysis model of PCRAM. In order to enhance the limited PCRAM write endurance, it uses redundant bit-writes removal technology to extend the endurance of PCRAM to an average 3.4x longer. It uses nonvolatile feature to avoid not necessary row buffer write back. It analyzes the memory access schedule algorithms, and results show that the row/open memory access schedule algorithm is suitable for PCRAM.
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