NDLI: vSlicer: latency-aware virtual machine scheduling via differentiated-frequency CPU slicing

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vSlicer: latency-aware virtual machine scheduling via differentiated-frequency CPU slicing

Content Provider	ACM Digital Library
Author	Xu, Dongyan Kompella, Ramana Rao Rao, Pawan N. Gamage, Sahan Xu, Cong Kangarlou, Ardalan
Abstract	Recent advances in virtualization technologies have made it feasible to host multiple virtual machines (VMs) in the same physical host and even the same CPU core, with fair share of the physical resources among the VMs. However, as more VMs share the same core/CPU, the CPU access latency experienced by each VM increases substantially, which translates into longer I/O processing latency perceived by I/O-bound applications. To mitigate such impact while retaining the benefit of CPU sharing, we introduce a new class of VMs called latency-sensitive VMs (LSVMs), which achieve better performance for I/O-bound applications while maintaining the same resource share (and thus cost) as other CPU-sharing VMs. LSVMs are enabled by vSlicer, a hypervisor-level technique that schedules each LSVM more frequently but with a smaller micro time slice. vSlicer enables more timely processing of I/O events by LSVMs, without violating the CPU share fairness among all sharing VMs. Our evaluation of a vSlicer prototype in Xen shows that vSlicer substantially reduces network packet round-trip times and jitter and improves application-level performance. For example, vSlicer doubles both the connection rate and request processing throughput of an Apache web server; reduces a VoIP server's upstream jitter by 62%; and shortens the execution times of Intel MPI benchmark programs by half or more.
Starting Page	3
Ending Page	14
Page Count	12
File Format	PDF
ISBN	9781450308052
DOI	10.1145/2287076.2287080
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2012-06-18
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Cloud computing Scheduler Virtualization
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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vSlicer: Latency-Aware Virtual Machine Scheduling via Differentiated-Frequency CPU Slicing

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vSlicer: latency-aware virtual machine scheduling via differentiated-frequency CPU slicing

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