Oracle JRockit - Lagergren_ Marcus.pdf - Oracle JRockit (3102) - superktos86

Oracle JRockit

The Deinitive Guide

Develop and manage robust Java applications with

Oracle's high-performance Java Virtual Machine

Marcus Hirt

Marcus Lagergren

BIRMINGHAM - MUMBAI

Oracle JRockit

The Deinitive Guide

system, or transmitted in any form or by any means, without the prior written

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critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy

of the information presented. However, the information contained in this book is

sold without warranty, either express or implied. Neither the authors , nor Packt

Publishing, and its dealers and distributors will be held liable for any damages

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However, Packt Publishing cannot guarantee the accuracy of this information.

First published: June 2010

Production Reference: 1260510

Published by Packt Publishing Ltd.

32 Lincoln Road

Olton

Birmingham, B27 6PA, UK.

ISBN 978-1-847198-06-8

www.packtpub.com

Cover Image by Mark Holland ( MJH767@bham.ac.uk )

Credits

Authors

Marcus Hirt

Editorial Team Leader

Gagandeep Singh

Marcus Lagergren

Project Team Leader

Priya Mukherji

Reviewers

Anders Åstrand

Staffan Friberg

Project Coordinator

Ashwin Shetty

Markus Grönlund

Daniel Källander

Proofreader

Andie Scothern

Bengt Rutisson

Henrik Ståhl

Graphics

Geetanjali Sawant

Acquisition Editor

James Lumsden

Development Editor

Rakesh Shejwal

Production Coordinator

Melwyn D'sa

Cover Work

Melwyn D'sa

Technical Editor

Sandesh Modhe

Indexer

Rekha Nair

Foreword

I remember quite clearly the irst time I met the JRockit team. It was JavaOne 1999

and I was there representing WebLogic. Here were these Swedish college kids in

black T-shirts describing how they would build the world's best server VM. I was

interested in hearing their story as the 1.2 release of HotSpot had been delayed again

and we'd been running into no end of scalability problems with the Classic VM.

However I walked away from the booth thinking that, while these guys were smart,

they had no idea what they were biting off.

Fast-forward a few years. BEA buys JRockit and I become the technical liaison

between the WebLogic and JRockit teams. By now JRockit has developed into an

excellent offering—providing great scalability and performance on server-side

systems. As we begin working together I have the distinct pleasure of getting to

know the authors of this book: Marcus Lagergren and Marcus Hirt.

Lagergren is a remarkably proliic developer, who at the time was working on the

compiler. He and I spent several sessions together examining optimizations of

WebLogic code and deciphering why this method or that wasn't getting inlined or

devirtualized. In the process we, along with the rest of the WebLogic and JRockit

teams, were able to produce several SPECjAppServer world records and cement

JRockit's reputation for performance.

Hirt, on the other hand, is extremely focused on proiling and diagnostics. It was

natural, therefore, that he should lead the nascent tooling effort that would become

JRockit Mission Control. This was an extension of an early observation we had, that

in order to scale the JRockit engineering team, we would have to invest in tooling to

make support and debugging easier.

Fast-forward a few more years. I'm now at Oracle when it acquires BEA. I have the

distinct pleasure of again welcoming the JRockit team into a new company as they

joined my team at Oracle. The core of the JRockit team is still the same and they now

have a place among the small group of the world's experts in virtual machines.

Oracle JRockit - Lagergren_ Marcus.pdf

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