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 | |
| Publication status | Published - 2011 Dec 1 |
| Event | 2nd Asia-Pacific Workshop on Systems, APSys'11 - Shanghai, China Duration: 2011 Jul 11 → 2011 Jul 12 |
Other
| Other | 2nd Asia-Pacific Workshop on Systems, APSys'11 |
|---|---|
| Country | China |
| City | Shanghai |
| Period | 11/7/11 → 11/7/12 |
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Keywords
- real-time system
- virtual machine
ASJC Scopus subject areas
- Control and Systems Engineering
Cite this
Toward under-millisecond I/O latency in Xen-ARM. / Yoo, Seehwan; Kwak, Kuen Hwan; Jo, Jae Hyun; Yoo, Hyuck.
Proceedings of the 2nd Asia-Pacific Workshop on Systems, APSys'11. 2011.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Toward under-millisecond I/O latency in Xen-ARM
AU - Yoo, Seehwan
AU - Kwak, Kuen Hwan
AU - Jo, Jae Hyun
AU - Yoo, Hyuck
PY - 2011/12/1
Y1 - 2011/12/1
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
UR - http://www.scopus.com/inward/record.url?scp=84857342092&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84857342092&partnerID=8YFLogxK
U2 - 10.1145/2103799.2103816
DO - 10.1145/2103799.2103816
M3 - Conference contribution
AN - SCOPUS:84857342092
SN - 9781450311793
BT - Proceedings of the 2nd Asia-Pacific Workshop on Systems, APSys'11
ER -