| DSCF:一种面向共享存储多核DSP的数据流分簇前向技术 |
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| 引用本文： | 汪东,陈书明.DSCF:一种面向共享存储多核DSP的数据流分簇前向技术[J].计算机研究与发展,2008,45(8). |
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| 作者姓名： | 汪东 陈书明 |
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| 作者单位： | 国防科学技术大学计算机学院,长沙,410073 |
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| 基金项目： | 国家高技术研究发展计划(863计划)，国家自然科学基金，高等学校博士学科点专项科研项目 |
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| 摘 要： | 多核数字信号处理器(DSP)的性能常常受限于共享存储的长延迟Cache一致性访问.数据前向(forwarding)技术是隐藏长延迟访问的一种有效手段.根据多核DSP应用的两类重要特征,提出了一种面向共享存储多核DSP结构的数据流分簇前向技术DSCF(data stream clustered forwarding).DSCF方法的主要特点是:兼容基本的共享存储Cache一致性协议;不污染目标Cache;数据的传输速度能够与消费速度相匹配;系统结构的可扩展性好.典型测试程序的模拟评测表明,采用DSCF方法能够将Cache一致性失效率平均降低44%,将系统总体性能提升30%～70%.
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| 关 键 词： | 多核DSP Cache一致性 数据前瞻 数据前向 数据流 |
DSCF:Data Streams Clustered Forwarding for Multi-Core DSPs with Memories Shared |
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| Wang Dong,Chen Shuming.DSCF:Data Streams Clustered Forwarding for Multi-Core DSPs with Memories Shared[J].Journal of Computer Research and Development,2008,45(8). |
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| Authors: | Wang Dong Chen Shuming |
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| Affiliation: | Wang Dong , Chen Shuming(School of Computer Science,National University of Defense Technology,Changsha 410073) |
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| Abstract: | Multi-core digital signal processors(MC-DSPs) are new multi-core processors for the emerging next generation of high performance embedded applications.Like multi-core general processors,MC-DSPs with memory-shared structures often suffer from the long access latency involved in cache coherency operations.Data speculation technology which mainly consists of data fetching and data forwarding is an efficient approach to hide this kind of access latency.Starting from exploring two important application features ... |
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| Keywords: | multi-core DSPs cache coherency data speculation data forwarding data streams |
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