Abstract

Providing Soft Real-time QoS Guarantees for Java Threads
James Pang - Redback Networks Gholamali Shoja - University of Victoria Eric Manning - University of Victoria
The Java platform has many characteristics that make it very desirable for integrated continuous media processing. Unfortunately, it lacks the necessary CPU resource management facility to support quality of service guarantees for soft real-time multimedia tasks. In this paper, we present our new Java Virtual Machine, Q-JVM, which brings CPU resource management to the Java platform. Q-JVM is based on SunÕs JVM version 1.1.5. It implements an enhanced version of the MTR-LS algorithm in its thread scheduler. Combined with admission control that could be implemented in an application-level resource manager, it is able to support QoS parameters such as fairness, bandwidth partitioning and delay bound guarantees, as well as the cumulative service guarantee. Our test results show that Q-JVM is backward compatible with the standard JVM from Sun, has low scheduling overhead, and is able to provide QoS guarantees as specified.

Providing Soft Real-time QoS Guarantees for Java Threads

James Pang - Redback Networks
Gholamali Shoja - University of Victoria
Eric Manning - University of Victoria

The Java platform has many characteristics that make it very desirable for
integrated continuous media processing. Unfortunately, it lacks the necessary
CPU resource management facility to support quality of service guarantees for
soft real-time multimedia tasks. In this paper, we present our new Java
Virtual Machine, Q-JVM, which brings CPU resource management to the Java
platform. Q-JVM is based on SunÕs JVM version 1.1.5. It implements an enhanced
version of the MTR-LS algorithm in its thread scheduler. Combined with
admission control that could be implemented in an application-level resource
manager, it is able to support QoS parameters such as fairness, bandwidth
partitioning and delay bound guarantees, as well as the cumulative service
guarantee. Our test results show that Q-JVM is backward compatible with the
standard JVM from Sun, has low scheduling overhead, and is able to provide QoS
guarantees as specified.