Collaborative Research: CSR-PSCE, SM: Memory Thermal Management for Multi-Core Systems

合作研究：CSR-PSCE、SM：多核系统的内存热管理

• 批准号: 0834475
• 负责人: Zhao Zhang
• 金额: $ 16万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0834475&HistoricalAwards=false
• 关键词: Collaborative; Research; CSR; PSCE; SM

With the increasing demand on memory performance by multi-core processors, the memory subsystem has become a new thermal concern along with the processor and the hard disk drive. To address this emerging issue, this project addresses several new, system-level Dynamic Thermal Management (DTM) schemes that coordinate the DRAM thermal management with the processor performance throttling, such as dynamically adjusting the number of active processor cores or scaling the processor's frequency and voltage level based on the memory thermal status. The project also studies coordinated thermal management schemes that consider the thermal requirements from both the processor and the memory subsystem. Thermal-aware OS job scheduling is further considered to smooth memory traffic and DRAM heat generation over time by mixing jobs with different memory demands appropriately. In addition, thermal-aware page allocation is proposed to avoid unbalanced overheating from some memory chips by considering the location of each chip and the memory access demand of each application. These schemes will first be evaluated using simulation and then implemented in OS kernels and evaluated on real systems. To support the memory thermal studies, a simple and accurate thermal model is proposed to estimate the dynamic temperature changes of DRAM memory subsystems. A two-level simulator will be developed to emulate the thermal behavior of memory subsystems. Successfully addressing the thermal concern of memory subsystems will not only ensure safe system operations but also improve the overall system performance, reduce the system manufacturing cost, and improve the system power efficiency.

随着多核处理器对内存性能的需求不断增加，内存子系统与处理器和硬盘驱动器一起成为新的散热问题。为了解决这个新出现的问题，该项目提出了几种新的系统级动态热管理 (DTM) 方案，该方案将 DRAM 热管理与处理器性能调节相协调，例如动态调整活动处理器核心的数量或扩展处理器的频率和性能。基于内存热状态的电压水平。该项目还研究协调热管理方案，考虑处理器和内存子系统的热要求。热感知操作系统作业调度被进一步考虑，通过适当地混合具有不同内存需求的作业来平滑内存流量和 DRAM 热量的产生。此外，通过考虑每个芯片的位置和每个应用程序的内存访问需求，提出了热感知页面分配，以避免某些内存芯片的不平衡过热。这些方案将首先使用模拟进行评估，然后在操作系统内核中实现并在真实系统上进行评估。为了支持内存热研究，提出了一个简单而准确的热模型来估计 DRAM 内存子系统的动态温度变化。将开发一个两级模拟器来模拟内存子系统的热行为。成功解决内存子系统的热问题不仅可以确保系统安全运行，还可以提高系统整体性能、降低系统制造成本并提高系统电源效率。