同时基于预知信息和预测机制的SDRAM动态页策略
提出一种同时基于预知信息和预测机制的SDRAM新型动态页策略。该策略可充分利用待处理访存请求的地址信息，能对后续页命中情况进行精确判断；而当没有待处理访存请求可预知时，则利用所记录的历史信息对后续页命中情况进行预测，以最大程度地选择最合适的页策略。分析证明该策略的硬件实现代价很小。实验证实三类主要的基于预知信息的动态页策略之间的性能差异较小，均能获得较理想的访存带宽，最好情况下，实际访存带宽可提升42％。其中，对于绝大多数测试激励，同时基于预知信息和预测机制的新型动态页策略的性能均为最优或接近最优，适应范围最广。...
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| Published in | 计算机工程与科学 Vol. 37; no. 12; pp. 2208 - 2215 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
数学工程与先进计算国家重点实验室,江苏无锡,214125
2015
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1007-130X |
| DOI | 10.3969/j.issn.1007-130X.2015.12.003 |
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| Abstract | 提出一种同时基于预知信息和预测机制的SDRAM新型动态页策略。该策略可充分利用待处理访存请求的地址信息，能对后续页命中情况进行精确判断；而当没有待处理访存请求可预知时，则利用所记录的历史信息对后续页命中情况进行预测，以最大程度地选择最合适的页策略。分析证明该策略的硬件实现代价很小。实验证实三类主要的基于预知信息的动态页策略之间的性能差异较小，均能获得较理想的访存带宽，最好情况下，实际访存带宽可提升42％。其中，对于绝大多数测试激励，同时基于预知信息和预测机制的新型动态页策略的性能均为最优或接近最优，适应范围最广。 |
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| AbstractList | TP302; 提出一种同时基于预知信息和预测机制的SDRAM新型动态页策略.该策略可充分利用待处理访存请求的地址信息,能对后续页命中情况进行精确判断;而当没有待处理访存请求可预知时,则利用所记录的历史信息对后续页命中情况进行预测,以最大程度地选择最合适的页策略.分析证明该策略的硬件实现代价很小.实验证实三类主要的基于预知信息的动态页策略之间的性能差异较小,均能获得较理想的访存带宽,最好情况下,实际访存带宽可提升42％.其中,对于绝大多数测试激励,同时基于预知信息和预测机制的新型动态页策略的性能均为最优或接近最优,适应范围最广. 提出一种同时基于预知信息和预测机制的SDRAM新型动态页策略。该策略可充分利用待处理访存请求的地址信息，能对后续页命中情况进行精确判断；而当没有待处理访存请求可预知时，则利用所记录的历史信息对后续页命中情况进行预测，以最大程度地选择最合适的页策略。分析证明该策略的硬件实现代价很小。实验证实三类主要的基于预知信息的动态页策略之间的性能差异较小，均能获得较理想的访存带宽，最好情况下，实际访存带宽可提升42％。其中，对于绝大多数测试激励，同时基于预知信息和预测机制的新型动态页策略的性能均为最优或接近最优，适应范围最广。 |
| Author | 吕晖 谢向辉 |
| AuthorAffiliation | 数学工程与先进计算国家重点实验室,江苏无锡214125 |
| AuthorAffiliation_xml | – name: 数学工程与先进计算国家重点实验室,江苏无锡,214125 |
| Author_FL | XIE Xiang-hui L(U) Hui |
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| Author_xml | – sequence: 1 fullname: 吕晖 谢向辉 |
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| Copyright | Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
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| DocumentTitleAlternate | A dynamic SDRAM page policy based on advance information and prediction mechanism |
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| Keywords | memory controller close page policy 页关闭策略 存储控制器 同步动态随机存储器 页打开策略 open page policy SDRAM 动态页策略 dynamic page policy |
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| Notes | We present a novel dynamic SDRAM page policy based on prediction mechanism and ad- vance information. The policy makes full use of the addresses of memory accesses to accurately deter mine whether the next memory access is a page hit or not. If there is not a pending memory access, the policy predicts whether a page hit happens or not according to history records. Theoretical analysis shows that the policy can be easily implemented at low hardware cost. Experimental results confirm that all the three main categories of dynamic page policies based on advance information achieve the desired memory bandwidth. Under the best circumstances, the actual memory bandwidth is improved by 42 %. Among the three policies, the policy based on both prediction mechanism and advance information is the best. LV Hui,XIE Xiang-hui（State Key Laboratory of Mathematical Engineering and Advanced Computing, Wuxi 214125, China） 43-1258/TP SDRAM ; memory controller ; open page policy ; close page policy ; dynamic page policy |
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| Snippet | 提出一种同时基于预知信息和预测机制的SDRAM新型动态页策略。该策略可充分利用待处理访存请求的地址信息，能对后续页命中情况进行精确判断；而当没有待处理访存请求可预知... TP302; 提出一种同时基于预知信息和预测机制的SDRAM新型动态页策略.该策略可充分利用待处理访存请求的地址信息,能对后续页命中情况进行精确判断;而当没有待处理访存请求可... |
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| SubjectTerms | 动态页策略 同步动态随机存储器 存储控制器 页关闭策略 页打开策略 |
| Title | 同时基于预知信息和预测机制的SDRAM动态页策略 |
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