本文選題：混合緩存 + 頁面著色　； 參考：《華中科技大學》2012年碩士論文

【摘要】：隨著片上多核CMP（Chip Multi Processor）成為主流微處理器技術，微處理器已經(jīng)進入多核時代。通過多核技術提高處理能力、降低消耗已成為微處理器的必然選擇。該技術面臨的另一挑戰(zhàn)是共享緩存的管理。共享緩存被多核競爭使用，不僅降低共享緩存的性能，而且日益增大的容量加重了CMP上緩存的能耗問題。 由多種內(nèi)存技術組成的混合緩存，兼具各緩存技術優(yōu)點，為上述問題提供了一種解決方案。混合緩存旨在利用程序訪問共享緩存的行為差異性來共享緩存的各個區(qū)域，以提供更好的訪問性能�；陧撁娣诸惡头胖貌呗缘幕旌暇彺婀芾頇C制以頁著色算法為基礎，由頁面分類單元和頁面放置單元兩部分組成。頁面放置單元用于動態(tài)統(tǒng)計頁級共享緩存的訪問頻率等信息，并對頁面實施分類。頁面放置單元通過頁著色算法，根據(jù)頁面分類單元所提供的共享緩存的頁面訪問信息來遷移頁面，達到管理共享緩存的目的。這兩個功能結構分別在系統(tǒng)的硬件層和操作系統(tǒng)層實現(xiàn)。 與現(xiàn)有的共享緩存管理機制相比，該機制能夠充分利用緩存密度高、漏電能耗較低的特點提升共享緩存性能。該機制具有以下優(yōu)點：在操作系統(tǒng)級管理混合緩存，降低混合緩存的設計復雜度，提高了管理機制的靈活性和可擴展性，整體系統(tǒng)開銷小。實驗結果表明，在使用基于頁面分類和放置策略的混合緩存管理機制之后，程序性能得到提高，，與未采用該機制的系統(tǒng)相比，平均IPC提高3.74%，最高提升可達22.76%。
[Abstract]:With the multi-core CMP(Chip Multi processor becoming the mainstream microprocessor technology, the microprocessor has entered the multi-core era. It has become an inevitable choice for microprocessors to improve processing capacity and reduce consumption through multi-nuclear techniques. Another challenge facing this technology is the management of shared caching. Shared cache is used by multi-core competition, which not only reduces the performance of shared cache, but also increases the energy consumption of cache on CMP. The mixed cache, which is composed of many memory technologies, has the advantages of each cache technology, which provides a solution to the above problems. Hybrid caching is designed to share each region of the cache by exploiting the behavioral differences of program access to the shared cache to provide better access performance. The mixed cache management mechanism based on page classification and placement strategy is based on page coloring algorithm and consists of two parts: page classification unit and page placement unit. The page placement unit is used to dynamically calculate the access frequency of the page level shared cache and to classify the page. The page placement unit migrates the page according to the page access information of the shared cache provided by the page classification unit through the page coloring algorithm to achieve the purpose of managing the shared cache. These two functional structures are implemented in the hardware layer and operating system layer of the system. Compared with the existing shared cache management mechanism, this mechanism can make full use of the characteristics of high cache density and low leakage energy consumption to improve the performance of shared cache. The mechanism has the following advantages: the hybrid cache is managed at the operating system level, the design complexity of the hybrid cache is reduced, the flexibility and expansibility of the management mechanism are improved, and the overall system overhead is small. The experimental results show that the performance of the program is improved after using the mixed cache management mechanism based on page classification and placement strategy. Compared with the system without this mechanism, the average IPC is increased by 3.74%, and the maximum improvement is up to 22.76%.
【學位授予單位】：華中科技大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TP333

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