Java仮想マシンの実装技術
PPLサマースクール2016「商用Java処理系の研究開発」のパート2です． http://ppl.jssst.or.jp/index.php?ss2016 Java言語処理系の実装について詳説する．まずJava仮想マシンの概要について述べ，その主要な構成要素として，クラス管理とインタープリタ，ヒープ管理とガベージコレクション，スレッド管理と同期機構，JITコンパイラとの連携，などについて説明する．性能改善のために行った各種手法についても触れる． 他のパート 1 Javaの登場と発展 http://www.slideshare.net/Tamiya_Onodera/java-66081108 2 Java仮想マシンの実装技術 http://www.slideshare.net/KiyokuniKawachiya/java-66003903 3 Java Just-In-Timeコンパイラの
Adaptive optimization of JIT compiler
1. x86 向け Hotspot の気持ちになって考える JIT コンパイラの適応的 最適化について Outline 1. JIT コンパイラの気持ちになって 2. 適応的最適化と上手に付き合う 3. Hotspot の x86 向け最適化 2012/06/16 X86/X64 最適化勉強会 4 nothingcosmos <nothingcosmos@gmail.com> 2. プロフィール x86 最適化勉強会は 1 回目以来 (icc を使う ) ソフトウェアエンジニア (SI 系 ) Excel がともだち 昔コンパイラを作る仕事をしていました。 ここ 1 年は JIT コンパイラを搭載した VM に興味が向いてました。 LLVM>Hotspot(OpenJDK)>V8>dartvm 決して Oracle の回し者ではありませんので、、 3. 注意点
JVM Deep Dive
Daniel Mitterdorfer, comSysto GmbH @dmitterd Behold! It will get scary. Topics Illusions by (J)VMs Interpreter JIT Compiler Memory Illusions Based on A JVM Does That??? Write Once, Run Anywhere One "Binary" for All Platforms Consistent Memory Model (Java Memory Model) Consistent Thread Model Bytecodes Are Fast (JITing) Infinite Heap (Garbage Collection) What "is" a JVM? The JVM is specified in The
Ftrace: The hidden light switch [LWN.net]
LWN.net needs you!Without subscribers, LWN would simply not exist. Please consider signing up for a subscription and helping to keep LWN publishing You may think, as I did, that analyzing the Linux kernel is like venturing through a dark dungeon: without the addition of advanced tracers like SystemTap, there's much that can't be seen, and can only be inferred. However, I've recently found hidden s
OTN Japan マニュアル
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Index of /~jrose/pres/
../ 200906-Cookbook_files/ 05-Jun-2009 03:44 - 200906-DVMCollab_files/ 01-Jun-2009 22:10 - 200906-LangNetDVM/ 01-Jun-2009 22:36 - 200906-RenaisVM_files/ 03-Jun-2009 06:53 - 201009-OneVMManyLanguages/ 23-Sep-2010 07:03 - 201009-ThunderingRhinos/ 23-Sep-2010 07:03 - 201106-indy-javadoc-mlvm/ 25-Jun-2011 01:26 - 201106-indy-javadoc-mlvm-old/ 25-Jun-2011 01:25 - 201309-jsr292/ 20-Sep-2013 07:03 - 2019
Java Memory Model Pragmatics (transcript)
This is a very long transcript for a very long talk. The talk’s running time is close to 120-150 minutes, and transcript may take even longer if digested thoughtfully. Please plan your reading accordingly. There are five large sections which are mostly independent of each other, that should help to split the reading. The talk is correct to the best of my knowledge, but parts of it may still be inc
Twitter-Scale Computing with OpenJDK
When Twitter switched from Ruby/Rails to Java, it needed something that would scale to 10,000s requests/sec per VM, and OpenJDK fit the bill perfectly. Not only did it prove production-ready, but its openness enabled Twitter engineers to extend it and deploy it internally to run its data centers with huge advantages for both developer support and system efficiency. In this talk David Keenan tells
Metaspace
3. 自己紹介 末永 恭正（すえなが やすまさ） @YaSuenag 某SIerでJavaやってるサンデープログラマー OpenJDK Author（jdk9） IcedTea Committer HeapStats作ってます http://icedtea.classpath.org/wiki/HeapStats/jp 5. Metaspace Permanent世代の代わりに導入されたメタ データ管理の仕組み JEP 122: Remove the Permanent Generation http://openjdk.java.net/jeps/122 “HotRockit”の一環 Perm世代をネイティブ メモリに追い出す
Java Reference Objects
Java Reference Objects Originally published: 2008-06-01 Last updated: 2015-04-27 or How I Learned to Stop Worrying and Love OutOfMemoryError Introduction I started programming with Java in 1999, after fifteen years with C and C++. I thought myself fairly competent at C-style memory management, using coding practices such as pointer handoffs, and tools such as Purify. I couldn't remember the last t
JVMに関して - nothingcosmos wiki
2016/05/04 LLVMのビルド方法 2014/04/08 OpenJDKのビルド方法 2014/02/23 作成したスライド 2014/02/22 JVM(HotSpot) VS. Dart VM 2014/02/16 RevisionLog32000台 DartVMのリビジョンログ 2014/01/11 RevisionLog31000台 2013/12/23 RevisionLog30000台 LLVMとの連携方法 2013/12/09 LLVMに関して LLVMのデバッグ方法 SSA形式 2013/11/10 RevisionLog29000台 2013/10/21 JITコンパイラ メニュー 自動並列化 ベクトル化 GCCに関して 2013/10/20 RevisionLog28000台 2013/09/28 RevisionLog27000台
Profiling Java In Production
In this talk Kaushik Srenevasan describes a new, low overhead, full-stack tool (based on the Linux perf profiler and infrastructure built into the Hotspot JVM) we've built at Twitter to solve the problem of dynamically profiling and tracing the behavior of applications (including managed runtimes) in production. Join the conversation! http://twitter.com/university
JIT compilation in modern platforms – challenges and solutions
This document discusses just-in-time (JIT) compilation techniques in modern runtimes. It outlines two main approaches to JIT - method-based compilation and tracing JIT. It then describes specific techniques used in the HotSpot JVM, including its fast interpreter, two-tiered JIT compilation, runtime profiling, devirtualization, incremental compilation, on-stack replacement, escape analysis and scal
JVM Internals
This article explains the internal architecture of the Java Virtual Machine (JVM). The following diagram show the key internal components of a typical JVM that conforms to The Java Virtual Machine Specification Java SE 7 Edition. The components shown on this diagram are each explained below in two sections. First section covers the components that are created for each thread and the second section
Understanding JVM Internals | CUBRID blog
Every developer who uses Java knows that Java bytecode runs in a JRE (Java Runtime Environment). The most important element of the JRE is Java Virtual Machine (JVM), which analyzes and executes Java byte code. Java developers do not need to know how JVM works. So many great applications and libraries have already been developed without developers understanding JVM deeply. However, if you understan
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Blog - Azul Systems, Inc.
https://openjdk.org/groups/hotspot/docs/RuntimeOverview.html
Javaの理論と実践: Javaメモリ・モデルを修正する 第1回
Solaris Essentials - General Technical Questions - Solaris on x86
https://java.net/jira/browse/OPENJDK6-29