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Towards Better Performance Per Watt in Virtual Environments on Asymmetric Single-ISA Multi-core Systems
(2,175 Views)
VERSION 1
Published
Created on: May 6, 2009 1:49 PM by
Alexandra Fedorova
-
Last Modified: Dec 17, 2009 4:43 PM by
Amitabh
<!-- [DocumentBodyStart:7aefacba-ed91-4293-9759-44e14a5e317d] --><div class='jive-rendered-content'><p>Single-ISA heterogeneous multicore architectures promise to</p><p>deliver plenty of cores with varying complexity, speed and</p><p>performance in the near future. Virtualization enables mul-</p><p>tiple operating systems to run concurrently as distinct, in-</p><p>dependent guest domains, thereby reducing core idle time</p><p>and maximizing throughput. This paper seeks to identify a</p><p>heuristic that can aid in intelligently scheduling these vir-</p><p>tualized workloads to maximize performance while reducing</p><p>power consumption.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>We propose that the controlling domain in a Virtual Ma-</p><p>chineMonitor or hypervisor is relatively insensitive to changes</p><p>in core frequency, and thus scheduling it on a slower core</p><p>saves power while only slightly a ecting guest domain per-</p><p>formance. We test and validate our hypothesis and further</p><p>propose a metric, the Combined Usage of a domain, to assist</p><p>in future energy-efficient scheduling. Our preliminary nd-</p><p>ings show that the Combined Usage metric can be used as</p><p>a starting point to gauge the sensitivity of a guest domain</p><p><span>to variations in the controlling domain's frequency.|||||</span><a class="jive-link-external-small" href="http://www.cs.sfu.ca/~fedorova/papers/OSR-hv.pdf" target="_blank">http://www.cs.sfu.ca/~fedorova/papers/OSR-hv.pdf</a></p></div><!-- [DocumentBodyEnd:7aefacba-ed91-4293-9759-44e14a5e317d] -->
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