NDLI: Symbiotic Scheduling for Virtual Machines on SMT Processors

Content Provider	IEEE Xplore Digital Library
Author	Kefeng Deng Kaijun Ren Junqiang Song
Copyright Year	2012
Abstract	Virtualization enables server consolidation which maximizes resource utilization by running multiple virtual machines simultaneously on the computer platform. One of the challenges faced by server consolidation is resource contention among the virtual machines. This problem will be further deteriorated on modern simultaneous multithreading (SMT) processors. Traditional symbiotic scheduling algorithms seek to co-schedule threads that have complementary resource requirements to reduce resource contention and boost system performance. However, this technique cannot be directly applied in virtualized environments since the applications are encapsulated in virtual machines. This paper proposed a symbiotic scheduling approach to improve the performance of concurrent workloads running in virtual machines on SMT processors. Our approach samples the resource demands of threads in virtual machines, passes the sampling data and thread to VCPU mapping information to the privileged domain in order for computing VCPU symbiosis. A VCPU scheduling algorithm is devised which dynamically pins the VCPUs according to their symbiosis. For load balance, a portion of less affinitive VCPUs are unpinned to provide the flexibility for VCPU migration. We have implemented a prototype on Xen and Experimental results show that the proposed approach can improve the performance of concurrent workloads by up to 24% in comparison with bare Credit scheduler.
Starting Page	145
Ending Page	152
File Size	1228850
Page Count	8
File Format	PDF
ISBN	9781467330275
DOI	10.1109/CGC.2012.54
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-11-01
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Symbiosis Processor scheduling Multicore processing Instruction sets Virtual machine Simultaneous Multithreading (SMT) VCPU symbiosis Symbiotic scheduling Virtual machining Hardware Virtualization
Content Type	Text
Resource Type	Article

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