November 2015 - java-devroom - lists.fosdem.org

CFP: The HotSpot Whitebox-Testing API
by Volker Simonis 30 Nov '15

30 Nov '15

Title: The HotSpot Whitebox-Testing API Abstract: One of the not so well-known tools of the HotSpot VM is its Whitebox-Testing API. Introduced in Java 7 it has been significantly improved and extended in Java 8 and 9. It can be used to query or change HotSpot internals which are not otherwise exposed to Java-land. While its features make it an indispensable tool for writing good HotSpot regression tests, it can also be used for experiments or for the mere fun of peeking into the VM. This talk will give an overview of the Whitebox-Testing API, it will show you how to build and use it and finally it will explain how the API can be easily extend to fit your own needs. Bio: Volker Simonis works in the SAP JVM Technology team. He is an OpenJDK contributor from the very beginning and helped SAP to engage in the OpenJDK project. He's the project lead of the OpenJDK PowerPC/AIX porting project, JDK8 committer and JDK9 reviewer. Recording me on audio/video is acceptable under a CC-BY-2.0 license.

1 0

Proposal: Hunting the bug from Hell
by Andrew Haley 30 Nov '15

30 Nov '15

Abstract: Imagine you receive a report of a bug which causes a segfault (i.e. a memory exception) in the HotSpot Java VM very occasionally. This bug only occurs about one time in ten; it might take many hours before it happens. It has only been observed when running one particular piece of proprietary software. It only seems to occur on one large machine when running many concurrent threads and a huge heap. There is a clue: it only seems to happen when running the parallel scavenge garbage collector. But you've no real idea of how the garbage collector works. This happened to me in 2015. I'm used to being able to find and fix bugs, but this one resisted all of my attempts for a long time. As far as I can recall it's the most difficult bug I've ever fixed. In hunting this bug I used every tool available to me as a HotSpot developer. I'll describe them and how they were used. We don't much talk about debugging. Many of us spend much of our time doing it, but not talking or writing about this important activity. We should talk about it more. If there's time it would be good to swap war stories. Andrew.

1 0

IMPORTAT: CFP Deadline extended
by Mario Torre 27 Nov '15

27 Nov '15

Hello all, As usual :) we will extend the CFP deadline for an additional [a bit more than a] week. The new deadline is set to Friday 11th December 1015 23.59 CET. This leaves us in a very critical time frame for accepting the proposals, so please don't count on a further extension! Cheers, Mario -- pgp key: http://subkeys.pgp.net/ PGP Key ID: 80F240CF Fingerprint: BA39 9666 94EC 8B73 27FA FC7C 4086 63E3 80F2 40CF Java Champion - Blog: http://neugens.wordpress.com - Twitter: @neugens Proud GNU Classpath developer: http://www.classpath.org/ OpenJDK: http://openjdk.java.net/projects/caciocavallo/ Please, support open standards: http://endsoftpatents.org/

1 0

CFP: Adoption's Group Cultural Guide to OpenJDK
by Mario Torre 27 Nov '15

27 Nov '15

Title: Adoption's Group Cultural Guide to OpenJDK Abstract: OpenJDK is now a well established Free Software Ecosystem, with a vibrant Community and lots of interesting stuff going on, with projects, repositories, bug database and above all experiments! This is exciting and fun, but given the challenges of such massive project, it is intimidating and it is easy to get lost. It is also easy to forget that such massive infrastructure requires well defined rules, that are sometime perceived as blocking rather than aiding the participation. To help people wanting to contribute keep track of this intricate forest of development and find their way in, the Adoption Group was created (http://openjdk.java.net/groups/adoption/) This session is an exchange between few of the hackers directly involved with the Adoption Group and the public, we will answer questions the audience may have in relation to getting involved with OpenJDK, try to define and explain workarounds for most common problems (and blockers!) that newcomers face, discuss some of the projects we are currently involved with, and hope to be your Ariadne's thread to win back the fun of contributing and participating at all levels, without ever getting lost! Speakers: Adoption Group Members -- pgp key: http://subkeys.pgp.net/ PGP Key ID: 80F240CF Fingerprint: BA39 9666 94EC 8B73 27FA FC7C 4086 63E3 80F2 40CF Java Champion - Blog: http://neugens.wordpress.com - Twitter: @neugens Proud GNU Classpath developer: http://www.classpath.org/ OpenJDK: http://openjdk.java.net/projects/caciocavallo/ Please, support open standards: http://endsoftpatents.org/

1 0

CFP: Thermostat for Developers
by Mario Torre 27 Nov '15

27 Nov '15

Title: Thermostat for Developers Abstract: Thermostat has evolved a log way from being a specialised tool for performance monitoring and analysis of the JVM, first by encompassing a generic framework for performance analysis and data visualisation and now with the addition of a powerful and advanced new Platform infrastructure that also allow users to build completely standalone projects. The Platform offers a familiar environment that handles Model View and Controllers objects, presentation layer, threading models, visualisation and also special effects, and a new data architecture. In this presentation we will demonstrate how to build an application based on Thermostat in few simple steps and how to take advantage of the new architecture to build stunning and visually appealing applications. Speaker: Mario Torre, Principal Software Engineer, Red Hat. Bio: Hacker for fun and freedom, free software enthusiast, musician and incurable romantic, proud husband and very proud father of a beautiful baby girl, he has served few key FLOSS projects like GNU Classpath and OpenJDK and is co-author of the Caciocavallo project. Mario has a strong interest in Computer Graphics and Human - Machine interaction and User Interface design. Currently works as a Principal Software Engineer for Red Hat on Thermostat, a monitoring platform for OpenJDK. Mario is an active Member and Contributor to the OpenJDK Project and its Community as an OpenJDK and Free Software advocate and Java Champion and Member of the Adoption Group. Cheers, Mario -- pgp key: http://subkeys.pgp.net/ PGP Key ID: 80F240CF Fingerprint: BA39 9666 94EC 8B73 27FA FC7C 4086 63E3 80F2 40CF Java Champion - Blog: http://neugens.wordpress.com - Twitter: @neugens Proud GNU Classpath developer: http://www.classpath.org/ OpenJDK: http://openjdk.java.net/projects/caciocavallo/ Please, support open standards: http://endsoftpatents.org/

1 0

Talk Proposal: This Is Not A Drill - Preparing for JDK 9
by Dalibor Topic 20 Nov '15

20 Nov '15

Title: This Is Not A Drill - Preparing for JDK 9 Abstract: With JDK 9 development underway in the OpenJDK Community, and based on our experiences with open source projects testing against JDK 9 Early Access builds in the Quality Outreach effort, it seems like a good idea to compile the accumulated wisdom to make it easier for new projects to start testing against JDK 9. In this session, you'll learn how to prepare your code for some of the upcoming changes in JDK 9 and how to join the OpenJDK crowd testing fun with your own open source project to help make JDK 9 better. Recording me on audio and/or video acceptable under a CC-BY-2.0 license (DEFAULT) - YES Bio: Dalibor Topić lives in Hamburg, Germany, and works as principal product manager for Oracle. He joined the OpenJDK project in order to help make it a successful open source project, and stayed for anchoring Java in Linux distributions, and as an all around Java FOSS community guy. Topić joined the Java strategy team at Oracle to help provide community feedback into long-term strategy planning. Blog: robilad.livejournal.com Twitter: @robilad cheers, dalibor topic -- Oracle <http://www.oracle.com> Dalibor Topic | Principal Product Manager Phone: +494089091214 <tel:+494089091214> | Mobile: +491737185961 <tel:+491737185961> Oracle Java Platform Group ORACLE Deutschland B.V. & Co. KG | Kühnehöfe 5 | 22761 Hamburg ORACLE Deutschland B.V. & Co. KG Hauptverwaltung: Riesstr. 25, D-80992 München Registergericht: Amtsgericht München, HRA 95603 Komplementärin: ORACLE Deutschland Verwaltung B.V. Hertogswetering 163/167, 3543 AS Utrecht, Niederlande Handelsregister der Handelskammer Midden-Niederlande, Nr. 30143697 Geschäftsführer: Alexander van der Ven, Astrid Kepper, Val Maher Green Oracle <http://www.oracle.com/commitment> Oracle is committed to developing practices and products that help protect the environment

1 0

Proposal: Optimizing Above the JVM in JRuby 9000
by Charles Oliver Nutter 13 Nov '15

13 Nov '15

Title: Optimizing Above the JVM in JRuby 9000 Abstract: JRuby has for years routed around the JVM, to maximize compatibility with standard Ruby. We've implemented byte[]-based String and Regexp, native POSIX support, and our own mixed-mode interpreting/jitting runtime atop JVM bytecode. With JRuby 9000, we're taking this even further. JRuby 9000 introduces a new IR-based optimizing compiler, with inlining, specialization, and other tricks applied to both interpreted and bytecode-compiled code. We've also gone fully native for much of IO and Process management. This talk will show the state of this work and how it affects JRuby and the wider JVM world. Charles Oliver Nutter (@headius, blog.headius.com) Thomas Enebo (@tom_enebo) JRuby (jruby.org)

1 0

Java Devroom Talk proposal - Eclipse
by Lars Vogel 13 Nov '15

13 Nov '15

Hello, everyone I plan to participate in FOSDEM and would like to propose a talk about Eclipse. I can also help with an Eclipse Hackathon if desired. See below for the proposal, let me know if something is missing. Best regards, Lars --------------- Insights into the Eclipse IDE open source project The Eclipse IDE a open project developed by a divers group of developers. In this talk the Eclipse IDE project is presented. Which tools are we using? Which developments are we doing, etc? How are we executing our texts and how can you hack on Eclipse and contribute it back to the project. The audience will learn about the project, what we are doing and how to contribute. Recording me on audio and/or video acceptable under a CC-BY-2.0 license (DEFAULT) - YES Bio: Lars Vogel is one of the project leads of the Eclipse platform project and a contributor a several other Eclipse projects. He loves to share his knowledge by writing online tutorials and book and is a regular speaker at international conferences. Lars is a nominated Java Champion since 2012. In 2010 he received the Eclipse Top Contributor Award and in 2012 the Eclipse Top Newcomer Evangelist Award. Microblog URL: https://twitter.com/vogella Blog URL: http://www.vogella.com/ -------------- -- Eclipse Platform UI and e4 project co-lead CEO vogella GmbH Haindaalwisch 17a, 22395 Hamburg Amtsgericht Hamburg: HRB 127058 Geschäftsführer: Lars Vogel, Jennifer Nerlich de Vogel USt-IdNr.: DE284122352 Fax (032) 221739404, Email: lars.vogel(a)vogella.com, Web: http://www.vogella.com

1 0