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false-sharing
相关语句
  伪共享
     Improving Data Locality and Reducing False-Sharing Based on Data Fusion
     一种利用数据融合来提高局部性和减少伪共享的方法
短句来源
  相似匹配句对
     False Words
     绞刑架False
短句来源
     On False Information
     试论言语假信息
短句来源
     Hermeneutics and false-reading
     诠释与误读
短句来源
     False-negative is 0%;
     假阴性0%;
短句来源
     Resources Sharing
     让科研资源得以共享
短句来源
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In this paper, the thrashing phenomenon due to false sharing in simple access patterns is analyzed in detail and the methods to eliminate the problem at compile-time are given.

在采用localcache和write-inval:datecache一致性协议的多级存储并行处理系统中,一个经常出现的现象就是真假共享所引起的Cache行抖动.由于这种数据在不同处理机的Cache间来回移动的现象严重地影响了并行机性能的发挥.它已受到计算机界广泛的关注.如何使这一问题得到简单而有效的解决已成为多级存储并行处理系统研究的一个关键.为了消除真共享引起的抖动现象,我们已经提出了一套编译重构技术.本文,我们将详细分析简单数组访问模式下的假共享抖动现象并给出编译消除抖动的方法.

This paper analyzes the false sharing cache line thrashing phenomenon in complex access patterns, introduces the concept of access intervals for parallel loops, and proposes a method called blocking and staggering to eliminate the false sharing thrashing at compile-time. Combining with the blocking and staggering, the idea of array expansion for multidimensional arrays is presented, and the algorithms to reduce or eliminate the thrashing in the cases where multilevel nested loop contains multiple write accesses...

This paper analyzes the false sharing cache line thrashing phenomenon in complex access patterns, introduces the concept of access intervals for parallel loops, and proposes a method called blocking and staggering to eliminate the false sharing thrashing at compile-time. Combining with the blocking and staggering, the idea of array expansion for multidimensional arrays is presented, and the algorithms to reduce or eliminate the thrashing in the cases where multilevel nested loop contains multiple write accesses are given.

在详细讨论了简单数组访问模式下假共享抖动现象及其消除方法[8]的基础上,本文着重分析了复杂访问模式下的假共享Cache行抖动现象和真假共享抖动并存现象,引入了并行循环访问距概念,提出了消除假共享抖动的编译方法─—块化错位方法.结合块化错位方法,我们提出了多维数组的数组扩展思想,给出了多重嵌套循环含多次写访问情况下减少或消除抖动的算法.

DSM(SVM) is a memory model which was proposed at the 1980s'. DSM solved the problem thatscalability was contradict with easy programming and merge their merits. The efficiency of DSM is still aproblem. The proposed solutions include prefetching and adopting new coherence model, but neither ofthem is a perfect solution. Prefetch will be less efficient when there are too many false sharing. The weak, relaxed coherence model is quite different from sequential coherence which was assumed by mostprogrammers intuitively,...

DSM(SVM) is a memory model which was proposed at the 1980s'. DSM solved the problem thatscalability was contradict with easy programming and merge their merits. The efficiency of DSM is still aproblem. The proposed solutions include prefetching and adopting new coherence model, but neither ofthem is a perfect solution. Prefetch will be less efficient when there are too many false sharing. The weak, relaxed coherence model is quite different from sequential coherence which was assumed by mostprogrammers intuitively, so programming and debugging becomes very difficult. We have proposed StrictWeak Hybrid Coherence (SWHC) model which can eliminate false sharing and provide more temporal andspatial locality, we also provide a scheme to keep sequential coherent. But SWHC model is complicate, asimplified model for Pthread share memory parallel computing model is proposed in the paper.

SWHC-StrictWeakHybridCoherenceModelforPthread¥RongLi;DingxingWang&MeimingShen(DepartmentofComputerScience&TechnologyTsingHuaU...

 
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