December 2018 - java-devroom - lists.fosdem.org

Accepted Talks
by Mario Torre 19 Dec '18

19 Dec '18

Hello all! We are finally ready to announce the list of accepted talks for the Free Java DevRoom 2018. Like every other year, this was a very difficult selection, this year in particular we had an overwhelming amount of high quality proposals and naturally we had to reject many given the time we have for the DevRoom. Some of those presentation may still be interesting for the following OpenJDK contributors workshop though, so if you are interested please check out the website here: https://openjdk.java.net/workshop Without further ado here is the list, in no particular order: Java Checkpoint/Restore - Christine Flood OpenJDK Governing Board Q&A - The OpenJDK GB Members Loom: Weaving executions - Ron Pressler Java Langauge Futures - Brian Goetz An introduction to Middleware Application Monitoring with Java Mission Control and Flight Recorder - Mario Torre And Marcus Hirt Securing the JVM, neither for fun nor for profit, but do you really have a choice? - Nicolas Frankel Learning about Deep Learning: Applications for OpenJDK/Java Verification - Shelley Lambert Performance tuning Twitter services with Graal and Machine Learning - Christian Thalinger Making the JIT part of the cloud - Irwin D'Souza A walkthrough guide to implementing a compiler intrinsic - Andrew Dinn Build your own GC with OpenJDK in 20 minutes - Roman Kennke The State of OpenJDK - Mark Reinhold Java with Docker: How to Make it Work - Adam Farley8 The Missing Benchmark Metric: Memory Consumption - Jens Wilke Rumble in the Java Jungle - Volker Simonis Tested for Business: An Open and Transparent Quality Kit - Shelley Lambert I will work on the schedule and try to finalise everything by end of the week, and also followup with the accepted speakers individually in the next hours for a final round of confirmation. I wish to take this opportunity to thank you all for sending a proposals and helping making this once more one of the most interesting Java conference in the world! Cheers, Mario Torre -- 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/

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FOSDEM 2019 Free Java Dev Room proposal submission: Project Skara: Investigating Git for code management and code review in the OpenJDK Community
by joe darcy 13 Dec '18

13 Dec '18

Title: Project Skara: Investigating Git for code management and code review in the OpenJDK Community Abstract: Project Skara (http://openjdk.java.net/projects/skara/) is investigating using Git rather than Mercurial for code management and code review of the OpenJDK sources. Of direct interest to OpenJDK contributors, the presentation will summarize the state of the investigation, perhaps even including a demo. Recording: Acceptable under the license proposed Bio: Joe is a long-time OpenJDK developer at Oracle and previously at Sun. Joe is lead of OpenJDK Project Skara and was previously the lead of Project Coin (small language changes in JDK 7) and the inaugural release manager, lead engineer, and quality lead for OpenJDK 6. In addition Joe leads the Compatibility & Specification Review Group which looks over interface changes proposed in JDK Release Projects. Microblog: https://twitter.com/jddarcy

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Free Java Devroom talk proposal: OpenJDK Governing Board Q&A
by mark.reinhold＠oracle.com 12 Dec '18

12 Dec '18

Title: OpenJDK Governing Board Q&A Abstract: An open Q&A session with members of the OpenJDK Governing Board. Length: 45 minutes Recording: Okay (at least on my part; I can't speak for others) Brief bio: Chief Architect, Java Platform Group, Oracle Blog: https://mreinhold.org/blog Twitter: @mreinhold

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Free Java Devroom talk proposal: The Future of Java & the JDK: Who is in Charge?
by mark.reinhold＠oracle.com 12 Dec '18

12 Dec '18

Title: The Future of Java & the JDK: Who is in Charge? Abstract: The Java platform has been declared dead on many occasions, yet it’s still one of the most popular programming platforms in the world. What’s the secret behind Java’s ongoing success? What does the future hold, and who gets to decide what that future will look like? Length: 25 minutes Recording: Okay under CC-BY-2.0; CC-BY-SA-2.0 preferred Brief bio: Chief Architect, Java Platform Group, Oracle Blog: https://mreinhold.org/blog Twitter: @mreinhold NOTE: This is an updated version of a similar talk that I presented at the OpenJDK Committers’ Workshop in August, 2018. I expect that it will be of interest here since there will be relatively little overlap between this audience and those who attended the August Workshop.

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Free Java Devroom talk proposal: The State of OpenJDK
by mark.reinhold＠oracle.com 12 Dec '18

12 Dec '18

Title: The State of OpenJDK Abstract: A review of the past year in the life of the OpenJDK Community, and a look at what's ahead. Length: 25 minutes Recording: Okay under CC-BY-2.0; CC-BY-SA-2.0 preferred Brief bio: Chief Architect, Java Platform Group, Oracle Blog: https://mreinhold.org/blog Twitter: @mreinhold

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Talk Proposal: Unit Testing with Junit Jupiter / JUnit 5
by Karl Heinz Marbaise 12 Dec '18

12 Dec '18

Title: Unit Testing with JUnit Jupiter / JUnit 5 Abstract: This talk will give you an overview about the usage of JUnit Jupiter platform (aka JUnit 5) and how to use it as unit testing foundation in Java. It will be shown which kind of options the new platform will offer. For example things like extensions or dynamic test generation. Also it will be taken into acount how it can be used in Maven builds. Time: 45 Minutes Recording: Ok Speaker Bio: Karl Heinz Marbaise is a german freelancer which is working in Java for about 15 years furthermore he is an Apache Maven PMC member and supports the development of Apache Maven in his spare time. Apart from that he is supporting customers in differencet areas of build management like Jenkins/Nexus etc.

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Talk Proposal: OpenJDK GCs of Today and Tomorrow
by Roman Kennke 12 Dec '18

12 Dec '18

Title: OpenJDK GCs of Today and Tomorrow Abstract: This talk intends to show a brief overview of the recent improvements in OpenJDK GCs, what are the problems modern GCs are trying to solve, and what are the challenges ahead. For example, the need for more concurrent GCs with compaction; the need for runtime support for concurrent reference processing and class unloading; the need for more efficient GCs, even when they fail; the need for GCs that can target denser memory footprint scenarios, etc. On top, the practical engineering concerns how to fit all that in a single JVM, multiple backends and compilers. Recording: Ok Speaker Bio: Roman Kennke is Prinipal Software Engineer at Red Hat, where he worked and works on OpenJDK and several related projects, including Thermostat, the Zero and Shark ports of OpenJDK, and currently on the Shenandoah Garbage Collector. In past lifes, he worked at aicas (realtime Java VM), Sun Microsystems (Webstart, Swing) and JP Morgan (you don't want to know).

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Talk Proposal: Build your own GC with OpenJDK in 20 minutes
by Roman Kennke 12 Dec '18

12 Dec '18

Title: Build your own GC with OpenJDK in 20 minutes Abstract: A new Garbage Collector interface has been introduced in OpenJDK 10, and has been further improved in OpenJDK 11 and 12. This talk will give a short sight-seeing tour through its design and its important interfaces and should give you an idea where to start, if you'd want to make your own Garbage Collector or want to get started with OpenJDKs existing collectors. Recording: Ok Speaker Bio: Roman Kennke is Prinipal Software Engineer at Red Hat, where he worked and works on OpenJDK and several related projects, including Thermostat, the Zero and Shark ports of OpenJDK, and currently on the Shenandoah Garbage Collector. In past lifes, he worked at aicas (realtime Java VM), Sun Microsystems (Webstart, Swing) and JP Morgan (you don't want to know).

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Talk Proposal: A walkthrough guide to implementing a compiler intrinsic
by Andrew Dinn 12 Dec '18

12 Dec '18

Title: A walkthrough guide to implementing a compiler intrinsic Preferred time: 25 minutes Abstract: One of the ways Java achieves high performance is to provide a route for accelerated, hand-crafted compilation of certain critical methods via the JIT. This optimization path is available both for native methods implemented as callouts to C code and for methods that are defined in Java. In both cases the method needs to be flagged as a HotspotIntrinsic and provided with a JITted code implementation. The intrinsic implementation defines the hand-crafted definition of as a high-level intermediate representation (IR) graph for the C2 JIT. This means it can be inlined into the IR graph for caller methods, providing even greater opportunities for optimization. This talk will demonstrate how to implement an intrinsic by walking through a specific real-life example that is currently under review as a JEP candidate. It will start by motivating the need for the intrinsic and defining the candidate as a Java method which relies on an underlying native implementation. It will then show how the candidate can be replaced with an intrinsic implementation, working through the changes required in the VM, the JIT compiler front and back end and, ultimately, the assemblers for x86 and AArch64. Recording me on audio and/or video is acceptable under a CC-BY-2.0 license (DEFAULT) Brief Bio: Andrew Dinn is a member of Red Hat's OpenJDK team and also leads JBoss project Byteman. He has been writing software professionally for three and a half decades and has no intention of stopping anytime soon. _______________________________________________ java-devroom mailing list java-devroom(a)lists.fosdem.org https://lists.fosdem.org/listinfo/java-devroom regards, Andrew Dinn ----------- Senior Principal Software Engineer Red Hat UK Ltd Registered in England and Wales under Company Registration No. 03798903 Directors: Michael Cunningham, Michael ("Mike") O'Neill, Eric Shander

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The Missing Benchmark Metric: Memory Consumption
by Jens Wilke 12 Dec '18

12 Dec '18

Title: The Missing Benchmark Metric: Memory Consumption Abstract: When doing benchmarks we are usually interested in comparing the throughput of different solutions. However, when the code under investigation is not trivial, memory consumption may vary significantly, because using more memory to achieve better throughput is a typical design trade off. The talk discusses what memory metrics are more or less meaningful and what approaches can be used to track memory consumption alongside JMH benchmarks. A special focus will be given on dynamic effects on the interaction with the garbage collector and whether it is possible to get some stable benchmark results. Time: Short Speaker: Jens Wilke Twitter: @cruftex Blog: cruftex.net Bio: A coding veteran and part time entrepreneur. Since 2000 he architects, builds and runs Java based eCommerce applications. Besides that, Jens has a broad industry experience and worked integration problems for SMEs but also helped building high availability infrastructures for fortune 500 companies. Jens is fanatic about performance. For Jens improving application performance is the key to reduce latency and provide a great User Experience. On the other hand, Jens also likes to improve the performance and happiness of teams. As a trained Srum Master, Jens has facilitated teams and companies in their agile adoption. Recording me on audio and/or video: Acceptable under any CC-BY license Remark: The talk is based on a blog article which was well received in the Java performance community. I'll plan to present some updated results for the latest JVM and GC implementation. Link: https://cruftex.net/2017/03/28/The-6-Memory-Metrics-You-Should-Track-in-You… -- "Everything superfluous is wrong!" // Jens Wilke - headissue GmbH - Germany \// https://headissue.com

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