通过爆发力提高能源效率

A. Papathanasiou, M. Scott
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引用次数: 66

摘要

操作系统资源管理策略传统上使用缓冲来“平滑”资源需求的波动。通过最小化空闲期间的长度和非空闲期间的争用级别,这种平滑倾向于最大化总体吞吐量并最小化单个请求的延迟。然而,对于某些重要的设备(磁盘、网络接口,甚至计算元件),平滑消除了使用低功耗模式节省能源的机会。随着具有这种模式的设备的激增,以及能源效率成为越来越重要的设计考虑因素,我们认为应该重新设计操作系统策略,以增加对能源敏感的设备的突发性。我们目前正在试验增加Linux操作系统的磁盘访问模式突发性的技术。我们的研究结果表明,有意创建突发活动可以节省高达78.5%的日立DK23DA磁盘消耗的能量(与当前策略相比),同时减少磁盘拥塞和启动延迟对应用程序性能的负面影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Energy efficiency through burstiness
OS resource management policies traditionally employ buffering to "smooth out" fluctuations in resource demand. By minimizing the length of idle periods and the level of contention during nonidle periods, such smoothing tends to maximize overall throughput and minimize the latency of individual requests. For certain important devices, however (disks, network interfaces, or even computational elements), smoothing eliminates opportunities to save energy using low-power modes. As devices with such modes proliferate, and as energy efficiency becomes an increasingly important design consideration, we argue that OS policies should be redesigned to increase burstiness for energy-sensitive devices. We are currently experimenting with techniques to increase the disk access pattern burstiness of the Linux operating system. Our results indicate that the deliberate creation of bursty activity can save up to 78.5% of the energy consumed by a Hitachi DK23DA disk (in comparison with current policies), while simultaneously decreasing the negative impact of disk congestion and spin-up latency on application performance.
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