• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Design, Automation & Test in Europe Conference & Exhibition;DATE 2013 >Exploiting subarrays inside a bank to improve phase change memory performance
【24h】

Exploiting subarrays inside a bank to improve phase change memory performance

机译：利用库中的子阵列来改善相变存储器性能

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Enabling subarrays reduces memory latency by allowing concurrent accesses to different subarrays within the same bank in the DRAM system. However, this technology has great challenges in the PCM system since an on-going write cannot overlap with other accesses due to large electric current draw for writes. This paper proposes two new mechanisms (PASAK and WAVAK) that leverage subarray-level parallelism to enable a bank to serve a write and multiple reads in parallel without violating power constraints. PASAK exploits the electric current difference between writing a bit 0 and a bit 1, and provides a new power allocation strategy that better utilizes the power budget to mitigate the performance degradation due to bank conflicts. WAVAK adds a simple coding method that inverts all bits to be written if there are more zeros than ones, with a goal to reduce electric current for writes and create larger power surplus to serve more reads if there is no subarray conflict. Experimental results under 4-cores SPEC CPU 2006 workloads show that our proposed mechanisms can reduce memory latency by 68.7% and running time by 34.8% on average, comparing with the standard PCM system. In addition, our mechanisms outperform Flip-N-Write 14.6% in latency and 8.5% in running time on average.
机译：启用子阵列通过允许同时访问DRAM系统中同一存储体内的不同子阵列来减少内存延迟。但是，由于正在进行的写操作会消耗大量电流，因此正在进行的写操作不会与其他访问重叠，因此，该技术在PCM系统中具有很大的挑战。本文提出了两种新的机制（PASAK和WAVAK），它们利用子阵列级的并行性来使存储体能够在不违反功率限制的情况下并行地进行一次写入和多次读取。 PASAK利用写入位0和位1之间的电流差，并提供了一种新的功率分配策略，该策略可以更好地利用功率预算来减轻由于存储体冲突而导致的性能下降。 WAVAK添加了一种简单的编码方法，如果零个多于零，则将所有要写入的位取反，目的是在不存在子阵列冲突的情况下减少写入电流，并创建更大的功率余量以服务于更多读取。在4核SPEC CPU 2006工作负载下的实验结果表明，与标准PCM系统相比，我们提出的机制平均可减少68.7％的内存延迟和34.8％的运行时间。此外，我们的机制在延迟方面平均优于Flip-N-Write 14.6％，在运行时间方面平均优于8.5％。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号