NDLI: JMTP: an architecture for exploiting concurrency in embedded Java applications with real-time considerations

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JMTP: an architecture for exploiting concurrency in embedded Java applications with real-time considerations

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JMTP: an architecture for exploiting concurrency in embedded Java applications with real-time considerations

Content Provider	ACM Digital Library
Author	Helaihel, Rachid Olukotun, Kunle
Abstract	Using Java in embedded systems is plagued by problems of limited runtime performance and unpredictable runtime behavior. The Java Multi-Threaded Processor (JMTP) provides solutions to these problems. The JMTP architecture is a single chip containing an off-the-shelf general purpose processor core coupled with an array of Java Thread Processors (JTPs). Performance can be improved using this architecture by exploiting coarse-grained parallelism in the application. These performance improvements are achieved with relatively small hardware costs. Runtime predictability is improved by implementing a subset of the Java Virtual Machine (JVM) specification in the JTP and trimming away complexity without excessively restricting the Java code a JTP can handle. Moreover, the JMTP architecture incorporates hardware to adaptively manage shared JMTP resources in order to satisfy JTP thread timing constraints or provide an early warning for a timing violation. This is an important feature for applications with quality-of-service demands. In addition to the hardware architecture, we describe a software framework that analyzes a Java application for expressed and implicit coarse-grained concurrent threads to execute on JTPs. This framework identifies the optimal mapping of an application to a JMTP with an arbitrary number of JTPs. We have tested this framework on a variety of applications including IDEA encryption with different JTP configurations and confirmed that the algorithm was able to obtain desired results in each case.
Starting Page	551
Ending Page	557
Page Count	7
File Format	PDF
ISBN	0780358325
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1999-11-07
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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