本文選題：片上多核處理器 + 共享L2Cache劃分　； 參考：《哈爾濱工程大學》2013年碩士論文

【摘要】：隨著多核處理器體系結構的飛速發展，片上多核處理器以其特有的優勢成為主流多核處理器架構被廣泛應用到服務器、PC機等商品中，對其進行的研究也在不斷深入。多核處理器在多任務處理、高性能計算方面優勢顯著，但還存在著制約其性能發揮的因素，如存儲墻問題在多核處理器系統中依然嚴重，極大地影響了多核處理器系統總體性能的進一步提升。 針對以上問題，本文將從共享L2Cache資源劃分技術和應用程序的L2Cache訪問類型感知的數據塊替換策略兩個方面具體闡述基于CMP的共享L2Cache管理策略。首先，，在片上多核處理器的基礎上，針對現有劃分技術中普遍忽略的失效開銷差異性問題，提出了一種基于訪存時間的L2Cache公平性劃分策略，該策略通過L2MSHR、監測器和HSHR三種硬件配置獲取失效率并行度信息計算各線程在獨占和共享L2Cache兩種情況下運行時間，并在MTFP算法和公平性評價指標FairT的指導下獲得每個劃分周期內各線程的分配路數。同時，針對LRU策略在大工作集應用程序和時間局部性差的流式應用程序中存在的性能嚴重下降的問題，提出了一種基于L2Cache訪存訪問類型感知的替換策略，該策略在ADC算法的指導下感知各個應用程序在不同時間周期內體現出的不同L2Cache訪存類型動態調整提升和插入方式，有效地降低了低頻訪問數據塊和零重用數據塊在L2Cache的駐留時間。 最后，結合MTFP策略和RPBL策略提出L2Cache管理策略LMSC，并對LMSC策略的運行機制進行了具體闡述。通過基于Gems和Simics的性能評價方案，從吞吐率、公平性和加權加速比三個方面對LMSC策略進行測評。實驗結果表明：與LRU策略相比，LMSC策略能夠在保證系統吞吐率的同時提升了加權加速比和系統公平性，具有良好的研究價值。
[Abstract]:With the rapid development of multi-core processor architecture, multi-core processor on chip has become the mainstream multi-core processor architecture because of its unique advantages. Multi-core processors have significant advantages in multi-task processing and high-performance computing, but there are still some factors that restrict their performance. For example, the problem of storage wall is still serious in multi-core processor systems. Has greatly affected the further improvement of the overall performance of multi-core processor systems. This paper describes the shared L2Cache management strategy based on CMP from two aspects: shared L2Cache resource partition technology and L2Cache access type aware data block replacement strategy of application program. Firstly, on the basis of multi-core processor on chip, a L2Cache fairness partitioning strategy based on memory access time is proposed, which is generally ignored in the existing partition technology. Through L2MSHRR, monitor and HSHR hardware configuration, the strategy acquires the failure rate parallelism information to calculate the running time of each thread in the case of exclusive and shared L2Cache. Under the guidance of MTFP algorithm and FairT, the number of allocation paths for each thread in each partition cycle is obtained. At the same time, a replacement strategy based on L2Cache access type awareness is proposed to solve the problem of serious degradation of LRU policy performance in large working set applications and streaming applications with poor temporal locality. Under the guidance of ADC algorithm, this strategy is aware of the different L2Cache memory access types dynamically adjusted and inserted in different applications in different time cycles. The low frequency access data block and the zero reuse data block residence time in L2Cache are reduced effectively. Finally, L2Cache management policy LMSCS is proposed by combining MTFP policy with RPBL policy, and the running mechanism of LMSC policy is expounded in detail. Through the performance evaluation scheme based on Gems and Simics, the LMSC strategy is evaluated from three aspects: throughput, fairness and weighted speedup. The experimental results show that compared with LRU strategy, LMSC strategy can improve the weighted speedup and system fairness while ensuring the throughput of the system, and has good research value.
【學位授予單位】：哈爾濱工程大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TP332

【參考文獻】

相關期刊論文 前8條

1 隋秀峰;吳俊敏;陳國良;;ARP:同時多線程處理器中共享Cache自適應運行時劃分機制[J];計算機研究與發展;2008年07期

2 賈小敏;張民選;齊樹波;趙天磊;;片上多核Cache資源管理機制研究[J];計算機科學;2011年01期

3 倪亞路;周曉方;;一種新型共享Cache動態劃分機制[J];計算機工程;2011年22期

4 所光;楊學軍;;面向多線程多道程序的加權共享Cache劃分[J];計算機學報;2008年11期

5 黃國睿;張平;魏廣博;;多核處理器的關鍵技術及其發展趨勢[J];計算機工程與設計;2009年10期

6 方娟;蒲江;張欣;;片上多核處理器共享Cache劃分的公平性研究[J];計算機工程與設計;2010年15期

7 李浩;謝倫國;;片上多處理器共享Cache的訪存時間最優劃分方法[J];通信學報;2012年04期

8 所光;楊學軍;;雙核處理器性能最優的共享Cache劃分[J];微電子學與計算機;2008年09期

相關博士學位論文 前2條

1 杜建軍;共享高速緩存多核處理器的關鍵技術研究[D];重慶大學;2011年

2 鄧林;單芯片多核處理器存儲優化技術研究[D];國防科學技術大學;2011年

本文編號：2000100