Credit-HC: An I/O-friendly CPU Scheduler for Xen

CORC > 北京大学 > 信息科学技术学院

	Credit-HC: An I/O-friendly CPU Scheduler for Xen
	Xia Yubin ; Yang Chun ; Niu Yan ; Cheng Xu
刊名	chinese journal of electronics
	2010
关键词	Server consolidation I/O performance Virtual machine monitor Virtual machine scheduling
英文摘要	Recent advances in virtualization technologies make the VM (Virtual machine) based server consolidation attractive for reducing cost and improving efficiency in enterprise computing. However, on a Xen-based platform, the I/O performance of a VM degrades significantly as the degree of consolidation increases, even if the VM is configured to have enough CPU share. This paper analyzes this phenomenon and identifies the reason as the mismatch between the CPU scheduler of Xen and its I/O architecture. We therefore present four enhancements for the CPU scheduler, including preempt-back, no-preemption of driver domain, block-bonus, and more fine-grained accounting. These enhancements are applied into our newly developed I/O-friendly CPU scheduler, namely Credit-HC (Credit-based high-consolidation-oriented) scheduler. The evaluation results show that with Credit-HC, one VM's I/O performance is nearly irrelevant to other domains' CPU workload, while the overhead is negligible. Moreover, the fairness of CPU share is kept as well.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000280461900005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Engineering, Electrical & Electronic; SCI(E); EI; 0; ARTICLE; 3; 409-413; 19
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/395651]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Xia Yubin,Yang Chun,Niu Yan,et al. Credit-HC: An I/O-friendly CPU Scheduler for Xen[J]. chinese journal of electronics,2010.
APA	Xia Yubin,Yang Chun,Niu Yan,&Cheng Xu.(2010).Credit-HC: An I/O-friendly CPU Scheduler for Xen.chinese journal of electronics.
MLA	Xia Yubin,et al."Credit-HC: An I/O-friendly CPU Scheduler for Xen".chinese journal of electronics (2010).