Toward under-millisecond I/O latency in Xen-ARM

Seehwan Yoo; Kuen Hwan Kwak; Jae Hyun Jo; Chuck Yoo

doi:10.1145/2103799.2103816

Toward under-millisecond I/O latency in Xen-ARM

Seehwan Yoo, Kuen Hwan Kwak, Jae Hyun Jo, Chuck Yoo

Department of Computer Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

9 Citations (Scopus)

Abstract

This paper addresses the I/O latency issue within Xen-ARM. Although Xen-ARM's split driver presents reliable driver isolation, it requires additional inter-VM scheduling. Consequently, the credit scheduler within Xen-ARM results in unsatisfactory I/O latency for real-time guest OS. This paper analyzes the I/O latency in Xen-ARM's interrupt path, and proposes a new scheduler to bound I/O latency. Our scheduler dynamically assigns priorities to guest OSs so that Xen-ARM ensures to schedule the most urgent task within the system. The experimental results show that Xen-ARM with our new scheduler reduces delay spikes, latency larger than 1ms, from 16% to 1% while retaining the split driver model.

Original language	English
Title of host publication	Proceedings of the 2nd Asia-Pacific Workshop on Systems, APSys'11
DOIs	https://doi.org/10.1145/2103799.2103816
Publication status	Published - 2011
Event	2nd Asia-Pacific Workshop on Systems, APSys'11 - Shanghai, China Duration: 2011 Jul 11 → 2011 Jul 12

Publication series

Name	Proceedings of the 2nd Asia-Pacific Workshop on Systems, APSys'11

Other

Other	2nd Asia-Pacific Workshop on Systems, APSys'11
Country	China
City	Shanghai
Period	11/7/11 → 11/7/12

Keywords

real-time system
virtual machine

ASJC Scopus subject areas

Control and Systems Engineering

Access to Document

10.1145/2103799.2103816

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Cite this

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title = "Toward under-millisecond I/O latency in Xen-ARM",

abstract = "This paper addresses the I/O latency issue within Xen-ARM. Although Xen-ARM's split driver presents reliable driver isolation, it requires additional inter-VM scheduling. Consequently, the credit scheduler within Xen-ARM results in unsatisfactory I/O latency for real-time guest OS. This paper analyzes the I/O latency in Xen-ARM's interrupt path, and proposes a new scheduler to bound I/O latency. Our scheduler dynamically assigns priorities to guest OSs so that Xen-ARM ensures to schedule the most urgent task within the system. The experimental results show that Xen-ARM with our new scheduler reduces delay spikes, latency larger than 1ms, from 16% to 1% while retaining the split driver model.",

keywords = "real-time system, virtual machine",

author = "Seehwan Yoo and Kwak, {Kuen Hwan} and Jo, {Jae Hyun} and Chuck Yoo",

year = "2011",

doi = "10.1145/2103799.2103816",

language = "English",

isbn = "9781450311793",

series = "Proceedings of the 2nd Asia-Pacific Workshop on Systems, APSys'11",

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note = "2nd Asia-Pacific Workshop on Systems, APSys'11 ; Conference date: 11-07-2011 Through 12-07-2011",

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AU - Yoo, Seehwan

AU - Kwak, Kuen Hwan

AU - Jo, Jae Hyun

AU - Yoo, Chuck

PY - 2011

Y1 - 2011

N2 - This paper addresses the I/O latency issue within Xen-ARM. Although Xen-ARM's split driver presents reliable driver isolation, it requires additional inter-VM scheduling. Consequently, the credit scheduler within Xen-ARM results in unsatisfactory I/O latency for real-time guest OS. This paper analyzes the I/O latency in Xen-ARM's interrupt path, and proposes a new scheduler to bound I/O latency. Our scheduler dynamically assigns priorities to guest OSs so that Xen-ARM ensures to schedule the most urgent task within the system. The experimental results show that Xen-ARM with our new scheduler reduces delay spikes, latency larger than 1ms, from 16% to 1% while retaining the split driver model.

AB - This paper addresses the I/O latency issue within Xen-ARM. Although Xen-ARM's split driver presents reliable driver isolation, it requires additional inter-VM scheduling. Consequently, the credit scheduler within Xen-ARM results in unsatisfactory I/O latency for real-time guest OS. This paper analyzes the I/O latency in Xen-ARM's interrupt path, and proposes a new scheduler to bound I/O latency. Our scheduler dynamically assigns priorities to guest OSs so that Xen-ARM ensures to schedule the most urgent task within the system. The experimental results show that Xen-ARM with our new scheduler reduces delay spikes, latency larger than 1ms, from 16% to 1% while retaining the split driver model.

KW - real-time system

KW - virtual machine

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M3 - Conference contribution

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T3 - Proceedings of the 2nd Asia-Pacific Workshop on Systems, APSys'11

BT - Proceedings of the 2nd Asia-Pacific Workshop on Systems, APSys'11

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