Credit-HC: An I/O-friendly CPU Scheduler for Xen | |
Xia Yubin ; Yang Chun ; Niu Yan ; Cheng Xu | |
刊名 | chinese journal of electronics
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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). |
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