NDLI: Design of the Java HotSpot#8482; client compiler for Java 6

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Design of the Java HotSpot#8482; client compiler for Java 6

Content Provider	ACM Digital Library
Author	Wimmer, Christian Kotzmann, Thomas Mössenböck, Hanspeter Russell, Kenneth Rodriguez, Thomas Cox, David
Copyright Year	2008
Abstract	Version 6 of Sun Microsystems' Java HotSpot#8482; VM ships with a redesigned version of the client just-in-time compiler that includes several research results of the last years. The client compiler is at the heart of the VM configuration used by default for interactive desktop applications. For such applications, low startup and pause times are more important than peak performance. This paper outlines the new architecture of the client compiler and shows how it interacts with the VM. It presents the intermediate representation that now uses static single-assignment (SSA) form and the linear scan algorithm for global register allocation. Efficient support for exception handling and deoptimization fulfills the demands that are imposed by the dynamic features of the Java programming language. The evaluation shows that the new client compiler generates better code in less time. The popular SPECjvm98 benchmark suite is executed 45% faster, while the compilation speed is also up to 40% better. This indicates that a carefully selected set of global optimizations can also be integrated in just-in-time compilers that focus on compilation speed and not on peak performance. In addition, the paper presents the impact of several optimizations on execution and compilation speed. As the source code is freely available, the Java HotSpot#8482; VM and the client compiler are the ideal basis for experiments with new feedback-directed optimizations in a production-level Java just-in-time compiler. The paper outlines research projects that add fast algorithms for escape analysis, automatic object inlining, and array bounds check elimination.
Starting Page	1
Ending Page	32
Page Count	32
File Format	PDF
ISSN	15443566
e-ISSN	15443973
DOI	10.1145/1369396.1370017
Volume Number	5
Issue Number	1
Journal	ACM Transactions on Architecture and Code Optimization (TACO)
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2008-05-29
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Java Compiler Deoptimization Intermediate representation Just-in-time compilation Optimization Register allocation
Content Type	Text
Resource Type	Article
Subject	Hardware and Architecture Information Systems Software

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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