本文選題：非易失性存儲器　切入點(diǎn)：緩存　出處：《計算機(jī)學(xué)報》2017年03期 　論文類型：期刊論文

【摘要】：隨著半導(dǎo)體工藝的發(fā)展,處理器集成的片上緩存越來越大,傳統(tǒng)存儲器面臨著存儲密度低和漏電功耗高等問題日益嚴(yán)峻.近年來,新型非易失性存儲技術(shù)展現(xiàn)出漏電功耗低、存儲密度高和可擴(kuò)展性強(qiáng)等優(yōu)點(diǎn),是最有潛力構(gòu)建大容量緩存的新技術(shù).然而,非易失性存儲器的寫操作次數(shù)有限,作為緩存將限制其壽命.同時緩存上的寫操作是不均勻的,存在緩存組間和組內(nèi)的寫波動,這一訪問特點(diǎn)將導(dǎo)致緩存的每部分磨損不均衡,現(xiàn)有的緩存管理策略卻不能感知緩存的寫波動.為解決這一問題,提出了SRAM輔助新型非易失性緩存的磨損均衡(SRAM-assistEd weAr Leveling,SEAL)方法,該方法包含寫波動感知的緩存塊遷移算法(Write Variation-aware blOck Migration,WVOM)和閾值指導(dǎo)的緩存塊遷移算法(Threshold gUided Block mIgration,TUBI).SEAL方法重點(diǎn)關(guān)注寫波動大的緩存組和寫強(qiáng)度高的緩存單元,著力減少這部分緩存單元的寫壓力.WVOM感知緩存組間寫波動并遷移寫強(qiáng)度大的緩存組,用于解決組間磨損均衡問題.TUBI遷移緩存組內(nèi)寫局部性高的緩存塊來達(dá)到組內(nèi)磨損均衡.實(shí)驗結(jié)果表明,SEAL方法與基準(zhǔn)配置相比,緩存的磨損程度平均減少了34.2%,緩存的平均壽命提升了175%,性能平均提高了0.735%,系統(tǒng)的動態(tài)功耗平均降低了5.65%.同時,SEAL方法與最新的研究成果相比,緩存的磨損程度平均減少了13.1%,緩存的平均壽命提升了20%.
[Abstract]:With the development of semiconductor technology, the on-chip buffer of processor integration becomes larger and larger. Traditional memory is faced with the problems of low storage density and high leakage power consumption. In recent years, new non-volatile memory technology has shown low leakage power consumption. The advantages of high storage density and high scalability are the most potential new technologies for building large capacity cache. However, the number of write operations of non-volatile memory is limited, and the lifetime of non-volatile memory is limited as a cache. At the same time, the write operation on the cache is not uniform. There are write fluctuations between and within cache groups, which will cause uneven wear and tear in every part of the cache. However, the existing cache management strategies are not aware of write fluctuations in the cache. A new wear equalization method, SRAM-assistEd weAr LevelingSEAL, is proposed for SRAM assisted non-volatile buffer. The method consists of write Variation-aware blOck migration algorithm (write Variation-aware blOck migration) and threshold guided buffer block migration algorithm (threshold). The method focuses on writing volatile cache groups and high-strength buffer units. Focus on reducing the write pressure of this part of the cache unit. WVOM perceives write fluctuations between cache groups and migrates the cache groups with high write strength, It is used to solve the problem of inter-group wear equalization. TUBI migrates the cache blocks with high write locality in order to achieve intra-group wear equalization. The experimental results show that the proposed method is compared with the reference configuration. The average wear degree of the cache has been reduced by 34.2 percent, the average lifetime of the cache has increased by 175, the average performance has increased by 0.7355.The dynamic power consumption of the system has been reduced by an average of 5.65. at the same time, the SEAL method is compared with the latest research results. The average wear of the cache has been reduced by 13. 1 and the average lifetime of the cache has increased by 20.
【作者單位】： 武漢大學(xué)計算機(jī)學(xué)院;武漢大學(xué)軟件工程國家重點(diǎn)實(shí)驗室;合肥工業(yè)大學(xué)計算機(jī)與信息學(xué)院;
【基金】：國家自然科學(xué)基金(91118003,61170022,61373039,61402145,61502346,61640220,61662002) 湖北省自然科學(xué)青年基金(2015CFB338) 安徽省自然科學(xué)青年基金(1508085QF138) 江西省教育廳科技項目(GJJ150605)資助
【分類號】：TP333

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