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 |
| 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
Fingerprint Dive into the research topics of 'Toward under-millisecond I/O latency in Xen-ARM'. Together they form a unique fingerprint.
Cite this
Yoo, S., Kwak, K. H., Jo, J. H., & Yoo, C. (2011). Toward under-millisecond I/O latency in Xen-ARM. In Proceedings of the 2nd Asia-Pacific Workshop on Systems, APSys'11 (Proceedings of the 2nd Asia-Pacific Workshop on Systems, APSys'11). https://doi.org/10.1145/2103799.2103816