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随着系统芯片(SoC)集成更多的功能并采用更先进的工艺,它所面临的高性能与低功耗的矛盾越来越突出.动态电压调整(DVS)技术可以在不影响处理器性能的前提下,通过性能预测软件根据处理器的繁忙程度调整处理器的工作电压和工作频率,达到降低芯片功耗的目的.文中讨论了DVS技术降低功耗的可能性,介绍了如何利用两种不同的DVS技术让处理器根据当前的工作负荷运行在不同的性能水平上,以节省不必要的功耗. 相似文献
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结合DVS技术和(m,k)-firm模型,提出一个保证完成率、适用于软实时多电压多处理器系统中有依赖关系任务集的动态低功耗算法VAP_DY。该算法权衡应用的性能需求、执行时间的不确定性和系统对合理执行失败的容忍来动态调整每个处理器运行时的供电电压,以降低多处理器系统的总功耗。分析和实验结果表明,VAP_DY能够在保证时间和完成率约束的条件下有效降低系统功耗。 相似文献
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ABSTRACT: It is hypothesized that a dynamic vapor sorption instrument coupled with an atmospheric pressure chemical ionization mass spectrometer (APCI-MS) may be useful for rapid analysis of volatile release from dry food materials. Preliminary data from a related system (Vapor Generator Instrument-APCI-MS) was used to monitor release of volatiles from spray-dried food polymers as a function of relative humidity at 40 °C. The system demonstrated differences in volatile release as a function of volatile compound, relative humidity, and food polymer. Comparison of these data with data collected using traditional shelf life study methodologies, and concerns for the ability of the method to accurately reflect time-dependent changes are discussed. 相似文献
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针对电压可调处理器的低功耗设计策略 总被引:3,自引:0,他引:3
在便携式系统的低功耗设计中,动态电源管理(Dynamic Power Management,DPM)和动态电压调节(Dynamic Voltage Scaling,DVS)已经成为比较通用的技术,并且很多实验数据表明DVS省电性能比DPM更为优越。本文针对电压可调的处理器,在理论证明的基础上提出了一种能够跟踪工作负载需求变化,在保证给定任务组中所有任务性能的同时实现系统能耗最优化的电压调节策略EOVSP(Energy Optimal Voltage Scaling Policy)。实验结果也表明,该策略在满足系统性能要求的前提下具有比一般DPM策略更好的省电性能。 相似文献
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Hui Liu Zili Shao Meng Wang Junzhao Du Chun Jason Xue Zhiping Jia 《Journal of Signal Processing Systems》2009,57(2):249-262
In this paper, we combine coarse-grained software pipelining with DVS (Dynamic Voltage/Frequency Scaling) for optimizing energy
consumption of stream-based multimedia applications on multi-core embedded systems. By exploiting the potential of multi-core
architecture and the characteristic of streaming applications, we propose a two-phase approach to solve the energy minimization
problem for periodic dependent tasks on multi-core processors with discrete voltage levels. With our approach, in the first
phase, we propose a coarse-grained task-level software pipelining algorithm called RDAG to transform the periodic dependent
tasks into a set of independent tasks based on the retiming technique (Leiserson and Saxe, Algorithmica 6:5–35, 1991). In the second phase, we propose two DVS scheduling algorithms for energy minimization. For single-core processors, we propose
a pseudo-polynomial algorithm based on dynamic programming that can achieve optimal solution. For multi-core processors, we
propose a novel scheduling algorithm called SpringS which works like a spring and can effectively reduce energy consumption
by iteratively adjusting task scheduling and voltage selection. We conduct experiments with a set of benchmarks from E3S (Dick
2008) and TGFF () based on the power model of the AMD Mobile Athlon4 DVS processor. The experimental results show that our technique can achieve
12.7% energy saving compared with the algorithms in Zhang et al. (2002) on average.
相似文献
Zhiping JiaEmail: |
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研究使用不同直投式发酵剂以及添加大豆多肽作为促进剂对豆酸奶产品感官品质和酸度的影响,初步探讨大豆多肽在豆酸奶中的应用.实验结果表明,在200mL的豆酸奶中选择Hansen YF-L811作为发酵剂,其添加量为0.02 g,蔗糖添加量为5~7 g,大豆多肽为1 g时,可获得感官品质较好的大豆多肽酸奶产品.制品中酸度的变化与大豆多肽添加量存在密切联系.添加大豆多肽作为促进剂,在豆酸奶的应用中具有一定的可行性. 相似文献