Java SE and Embedded SE The road forward, 2011 edition

Transcription

1 <Insert Picture Here> Java SE and Embedded SE The road forward, 2011 edition Greg Bollella Chief Architect, Embedded Java

2 A Moment of Silence To remember those who perished in the earthquake and tsunami and to honor those helping with the reactor and all other restoration activities 2

3 The following is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracle s products remains at the sole discretion of Oracle. 3 3

4 A Word on Content There is much more content in this presentation than we can talk about in an hour. Today I will highlight important points. Please obtain copies to reference after today. Feel free to contact me with any questions at any time. 4

5 Agenda Java SE Past Present Future Embedded Java (SE and OJEC) Background Tips Trends, Futures Resources Demo Q&A 5

6 Apples and Pears JDK javac JRE jdbc JVM java I/O G1 -Xmx=4g 6

7 Past 7

8 Language Collections 2002 JCP 2006 JVMTI JDBC 2000 Hotspot 2004 Generics? 8

9 Working In Java 9

10 Work in Java 10

11 JRockit products JROCKIT MISSION CONTROL Complete insight into application & JVM behavior Zero performance overhead in production environments 2002 No application modification or configuration required JROCKIT REAL TIME High-performance real-time solution for standard Java Industry leading Deterministic Garbage Collector 2006 Millisecond response times with five nines guarantee Improve application performance & latency with unique tooling JROCKIT VIRTUAL EDITION Fly-weight Java container for virtualized environments Improve datacenter efficiency - do more with less 2009 Simpler and more powerful VM management JROCKIT JVM Server-side focus 2000 World-class performance Powerful diagnostics 11

12 Java SWOT Sun days Strengths Most used programming language Garbage collection Community driven Adaptive runtime Install base Strong community High performance Weaknesses No new releases Steward out of cash No good Smart phone story Opportunities Multi Core JVM interop Cloud Threats Next big thing Walled garden platforms Not attractive to new developers Uncertain future 12

13 Present 13

14 What occupies our days? Dev Java 7 JDK 7 Convergence Misc Reconnecting with community Java 8 Java 9+ 14

15 JDK 7 / Java 7 Plan B Sep JDK 7 Feature Complete Dec Java 7 JSR approved Dec GA Jul

16 2 teams enter, one team leave Hotspot 16

17 2010 Eclipse Community survey 69, % vs 4.6% 17

18 2 teams enter, one team leave Hotspot Market share 18

19 2 teams enter, one team leave Hotspot Market share Client and Server version Quality 19

20 2 teams enter, one team leave Hotspot Market share Client and Server version Quality JRockit Value adds JRockit Mission Control JRockit Flight Recorder JRockit Virtual Edition Optimized for the Oracle stack 20

21 Convergence = 3? 21

22 Convergence JRockit HotRockit Hotspot 22

23 Official roadmap, from JavaOne 2010 JDK JDK Open JDK unchanged JVM Merge -> Open JDK JDK/JRE still free, same terms on license Premium (Such as: JFR, JRMC, JFB, Support) 23

24 JDK 7 Features (Partial List) JSR 292: Support for dynamically typed languages Strict class-file checking JSR 334: Small lang enhancements (Project Coin) Upgraded Class Loader Architecture Concurrency and collections updates Unicode 6.0 JSR 203: More new IO APIs NIO.2 Stream Control Transmission Protocol Sockets Direct Protocol Elliptic-curve cryptography (ECC) 24

25 JDK 8 Planning JSR 294: Language and VM support for modular programming JSR 308: Annotation on Java Types JSR TBD: Language support for collections JSR TBD: Project Lambda (closures) Modularization (Project Jigsaw) Swing Application Framework Swing JDatePicker component 25

26 Java SWOT Oracle Strengths Most used programming language Garbage collection Community driven Adaptive runtime Write once Strong community High performance Weaknesses No new releases Steward out of cash No good Smart phone story Opportunities Multi Core JVM interop Cloud Threats Next big thing Walled garden platforms Not attractive to new developers Uncertain future Bad name in community 26

27 Future 27

28 What s Coming 28

29 Switching Gears Oracle Java Embedded Client CVM, CDC JRE Embedded SE Hotspot, SE JRE 29

30 Java Everywhere 30

31 The Spectrum of Java Servers Desktop Embedded TV Mobile Card BD-J Java EE JavaFX Java TV MSA Java SE Java ME Java Card Java Language 31

32 Switching Gears Oracle Java Embedded Client CVM, CDC JRE Embedded SE Hotspot, SE JRE 32

33 How to Choose Oracle Java Embedded Client CVM, CDC JRE Best when Low static footprint Low use of dynamic memory Very portable across processor/os combinations Embedded SE Hotspot, SE JRE Best when: High throughput Full SE API set 33

34 Introducing Oracle Java ME Embedded Client Industry leading, best-in-class CDC JVM Version 1.0 to be released in Q2 CY2011 Connected Device Configuration Foundation Profile (FndP) 1.1 Personal Basis Profile (PBP) 1.1 Optional packages: Web Services (JSR-172), JDBC (JSR-169), RMI (JSR-66) High performance and reliability with low memory footprint Java SE subset Static (CDC headless): 3.5MB Dynamic: Typical RAM 8MB and up 34

35 Oracle Java ME Embedded Client Overview Optimized for resource constrained devices Ported to multiple Processors / OS / Graphics Mass deployments in industrial and consumer devices Available in binary and source 35

36 Oracle Java ME Embedded Client Release 1.0 Headless Stack Headful and SDK Linux Arm v5/v6/7 Linux MIPS Linux PPC Linux x86 Windows x

37 Oracle Java ME Embedded Client What is included in 1.0? Target runtime binary ARM v5/v6/v7, MIPS, PowerPC Linux Headless Install Guide, User Guide, Release Note SDK in Windows and Linux Starter kit - step by step guide to creating a new Java embedded system White paper link to How To guide How to get Linux running on the BeagleBoard How to install JEC, use the NetBeans plug-in, access the USB, connect to the network, log data, access sensors, install and use a web server, etc. Sample code/app and how to build a simple app Dev board link to Beagle board vendor Tools link to NB plug-in 37 37

38 Oracle Java ME Embedded Client Major Features (1) Fast startup time Romization Ahead of time Compiler (AOT) Multiple application support (mtask) Low power handling, optimized battery power Fast dynamic compiler Tunable and easily retargetable Native calling Fast native calling with CNI CLDC/MIDP support with KNI JNI 38

39 Oracle Java ME Embedded Client Major Features (2) Portability JIT & OS Porting layer Service Provider API Easy porting and re-targetable to different OSs & CPUs Direct calls to HW for optimization Almost entirely in C Portable to compilers that don t support 64-bit longs Pluggable architecture Java compatibility JVM and JLS compliant Proper subset of Java SE API Industrial standards OSGi, BD-J, GEM/MHP, OCAP, Ginga-J Portion of library code optimized for small devices 39

40 Oracle Java ME Embedded Client Major Features (3) Hardened system Resource Management, Memory Allocator Fail gracefully Well tested in low resource conditions Ordered shutdown and re-startability ThreadControl Clean shutdown and re-start Re-Initialize correctly on VM re-start JVMTI support Multi core support MIDP/MSA support Pluggable Graphics architecture Leverage OS capabilities (e.g. processes for mtask) 40

41 Oracle Java ME Embedded Client Additional features under consideration Java API and language to SE 6 subset New languages features New API packages (Security, NIO, Logging, Annotations, GCF, Unicode) Enhancements X86 JIT added 32 bit typeid support Improved Symmetric Multiprocessing support Multitasking support Memory management support Graphics acceleration support, OpenGL ES Runtime Romization for application startup time 41

42 Switching Gears Oracle Java Embedded Client CVM, CDC JRE Embedded SE Hotspot, SE JRE 42

43 Java: The Best Platform for Embedded Applications 1 Decouples software development from hardware development cycle 6 Most popular embedded processors supported allowing design flexibility 2 Development and testing can be done (mostly) using standard desktop systems 7 Support for key embedded features (low footprint, power mgmt., low latency, etc) 3 Highly productive language, APIs, runtime, and tools mean quick time to market 8 Leverage huge Java developer ecosystem (expertise, existing code) 4 Create high-performance, portable, secure, robust, cross-platform applications easily 9 Easily create end-to-end solutions integrated with Java back-end services 5 Java isolates your apps from language and platform variations (e.g. C/C++, kernel, libc 10 differences) Solutions from constrained devices to server-class systems 43

44 SE for Embedded Product Overview Two groups of product offerings For Desktops/Servers AND Embedded Standard Releases and Platforms: x86, x64, Sparc (32 and 64 bit) Linux, Windows, Solaris On the web, regular updates For Embedded ONLY Additional platforms: ARM, PowerPC, XP-Embedded Additional features: Headless/Small Footprint, Memory Optimizations, Low Memory Handling, Power Savings On the web, transitioning to regular updates Wide range of platforms supported (30+ ISA/OS sets) Development is free Deployment requires commercial licensing 44

45 Java SE for Embedded Example devices ATMs Parking Meters POS Systems Lottery/Gaming Systems Multi Function Printers Intelligent Power Module Netbooks Routers & Switches Storage Appliances Network Management Systems Medical Imaging Systems Radar Systems Industrial PCs Factory Automation Systems Geo-Imaging Devices Smart Meters RFID Readers Video Conferencing Systems In-Flight Entertainment Systems Video Streaming Systems Electronic Voting Systems Voice Messaging Systems Security Systems 45

46 Java SE Embedded in Smart Metering EnergyICT Java SE Embedded Based Smart Meter Concentrator 46

47 Current Java SE Embedded Offerings SE 6u25 latest release available on web Apr 21, 2011 NEW Processor Operating System Headless or Headful FPU Java SE Version ARMv5 Linux Headless SFLT 6u25 ARMv6/v7 Linux Headless & Headful (v7) VFP 6u25 PowerPC e600 core Linux Headless Classic HW FP 6u25 PowerPC e500v2 core Linux Headless Embedded FP 6u25 x86 Linux Headless X86 6u25 * All configurations dynamically detect and support single or multi-core processors 47

48 Java SE for Embedded 6u21 Release (Nov 1, 2010) Started the sync of SE Embedded with SE Major update for embedded platforms Updated PowerPC and x86 releases from 5u10 to 6u21 Updated ARM releases from 6u10 to 6u21 Reduced SE/SE-Embedded release gap to 4 months Expanded Multi-Core Support Added multi-core support for ARM and PowerPC Additional Platform Support Added support for PowerPC e500v2 Improved Performance/Benchmarks SPECjvm98 improvements: ARM 10%; PPC 19%, x86 17% ~20% improvement in CaffeineMark on all SE-E 6u21 ~2x the performance of Android on common benchmarks 48

49 Java SE for Embedded 6u25 Release (Apr 21, 2011) Completed the sync of SE Embedded with SE Full SE 6 Alignment Sync'd most popular Java embedded platforms with latest SE release ARM (v5, v6, v7), PowerPC (e600, e500v2) and X86 Shipped simultaneously as SE 6u25 Rich set of features and APIs of SE 6u25 and the hundreds of enhancements, security improvements and bug fixes now available to embedded Multi-core support of Java SE such as parallel GC and background JIT compilation are available for growing use of multi-core in embedded Allows developers to deploy on their embedded device the same Java SE version they develop with on their PC. 49

50 Embedded CaffeineMark Performance Improvements +29% +22% +21% 50

51 specjvm98 Performance Improvements +19% +17% 51

52 2.6X 1.53X 2.15X 2.17X Beagleboard Specs TI OMAP3530 CPU Cortex-A8 256MB RAM 600Mhz * Chart is displaying relative performance differences only. Scores have been proportionately scaled to fit on chart. 52

53 3.2X 2X 2.5X Tegra-2 Specs ARM Cortex-A9 Dual-Core CPU 1GB RAM 1GHZ * Chart is displaying relative performance differences only. Scores have been proportionately scaled to fit on chart. 53

54 Outline SE Embedded Background Java intro SE Embedded product overview Tips for using SE Embedded Getting started Tuning Java SE Improving startup Garbage collector selection Reducing resource requirements Trends, Futures Resources Q & A <Insert Picture Here> 54

55 Getting Started Purchase Embedded Device Many low cost ARM single and multi-core devices Single Core ARM Cortex-A8 devices SheevaPlug ($99) BeagleBoard ($149) Multi-Core ARM Cortex-A9 devices PandaBoard ($174) Nvidia Tegra 250 Developer Kit ($399) developer.nvidia.com/tegra/tegra-devkit-features You ll need USB Keyboard, Mouse and HDMI Video monitor Download / Install / Setup Linux Distribution Some vendors provide pre-installed ready-to-go Linux distros. Special Computing does this for Beagleboard and Pandaboard Download and un-tar Java SE Embedded 55

56 Sample Embedded ARM Devices Beagleboard Plug computer Beagleboard Specs TI OMAP3530 CPU Cortex-A8 256MB RAM 600Mhz Plug Computer Specs Marvell ARMv5 CPU 512MB RAM 1.2ghz Pandaboard Pandaboard Specs TI OMAP4430 CPU Dual Core Cortex-A9 1GB RAM 1Ghz 56

57 Java SE Embedded Platform Example GuruPlug Low Power ARM/Linux based device design by Maxwell 512 MB RAM, 512 MB Flash, USB & Gigabit Ethernet Approx $ for single devices Flexible and Capable Runs Java SE Arm v5/linux headless Low Power Java Web Server: 57

58 Tuning your Embedded Java Solution Default configuration Improving Startup Time Taking Advantage of Multi-core processors Picking the Right Garbage Collector Throughput/Response Time Disk/Flash Consumption Memory Consumption Clock Speed, Number of CPUs Heap Size JIT Strategy Startup Time Garbage Collection Policy 58

59 Java SE Embedded Design Focus Assumptions leading to our default configuration of SE Embedded Most embedded devices are resource constrained Keeping per unit device cost low is high priority Use lower clocked processors Option Performance Monitoring Compression of JAR Files All JRE Files Included Class Data Sharing JIT Compiler Java SE Embedded Default State Off by Default All Jar File Compressed Optional Files Removed Off by Default Only client JIT available 59

60 Improving Startup Time Class Data Sharing (If classloading is bottleneck) Enabling Class Data Sharing Customizing Class Data Sharing Archive Can improve Startup by 25%-30% Uncompressing jar files (If disk space is available) Gain is dependent on disk access and CPU clock speed Lower Compilation Threshold (If MP device) -XX:CompilationThreshold=xxxx (default is 1500) Deferring Initialization or Class Loading in your application 60

61 Enabling and Configuring Class Data Sharing Enabling CDS with default classlist java Xshare:dump Once complete, CDS is automatically enabled Use java Xshare:on OR Xshare:off to compare startup times. The default classlist is for GUI Swing Based Apps 61

62 Customizing Class Data Sharing for Embedded Java Applications 1. Create a list of classes loaded at the startup of your application java Xshare:off XX:+TraceClassLoadingPreorder {your app} >my_class_list *exit your app soon after startup 2. Extract only bootclass loaded classes. Outputs classlist.linux. java MakeClassList my_class_list >new_classlist 3. Add checksum to end of new_classlist java AddJsum new_classlist classlist 4. Copy classlist to {JRE}/lib directory 5. Create classes.jsa file java Xshare:dump You now have a customized classes.jsa file! Tools referenced on this page can be found in openjdk sources here: jdk/make/tools/src/build/tools 62

63 Taking Advantage of Multi-Core Processors with Java Built in VM Features that take advantage of SMP Parallel Garbage Collection Concurrent Garbage Collection Background JIT Compilation Lower Compilation Threshold Parallelize your Java Application Code 63

64 Which Garbage Collector Should I Use? Java SE Embedded Contains all of the standard collectors Collector Option Pro Con MP Serial -XX:+UseSerialGC (default) Best Choice for single CPU N Concurrent -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode Better if response time is highest priority Shorter GC pauses Uses processor resources while embedded app is running Y Parallel (Young) Parallel (Old) -XX:+UseParallelGC -XX:+UseParallelOldGC Better if throughput is highest priority. Uses multiple processors to speed up GC collection GC must still pause embedded app during collections. Y For more details on GC tuning options see: 64

65 Reducing System Resource Requirements (Reducing Memory Consumption) Customizing Heap Sizes -Xms -Xmx Adjust Free Ratios -XX:MaxHeapFreeRatio=xx (control heap reduction, default 70) -XX:MinHeapFreeRatio=xx (controls heap expansion, default 40) Reducing JIT CodeBuffer -XX:ReservedCodeCacheSize=xxM Standard Java SE tools can be used to identify potential memory savings Use jvisualvm with Linux x86 JDK Heapdump option 65

66 Outline SE Embedded Background Java intro SE Embedded product overview Tips for using SE Embedded Getting started Tuning Java SE Improving startup Garbage collector selection Reducing resource requirements Trends, Futures Resources Q & A <Insert Picture Here> 66

67 Embedded Microprocessor Trends Cortex A5 Dual Core Cortex A9 Dual/Quad Core 250mw power 1ghz today ARM Eagle Cortex A15 Coming Quad 2.5 ghz! Nvidia Tegra 2 1ghz Dual A9 Marvell Quad-Core TI OMAP4 Dual core Cortex-A9 Atom Dual Core Processors N ghz 8.5w D ghz 13w D ghz 13w ghz 8w PowerPC QorIQ Family P2020 Dual Core 1.2ghz P4080 Quad Core 1.5ghz Embedded Communication Processors Common Themes Embedded systems getting more powerful Multi-core is everywhere Intel pushing into embedded with Atom; ARM plans to go after server appliances Net: Great opportunity for Java SE Embedded 67

68 SE Embedded Futures Track SE releases closely SE 7 Highlights Mid-2011 JSR 292 -InvokeDynamic Project Coin (small language changes) SE 8 Highlights End-2012 Project Lambda Closures Modularity Performance, startup and size reduction always top priority Bundled solutions for specific markets e.g. Berkeley DataBase 68

69 Embedded SE, BDB, Mobile Sync Client/Server, 11g Sync Client Temp App ese BDB Linux Sync Server 11g SE Windows insert_record(temperature);! 69

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71 Resources Oracle Embedded Java Products Java SE Home Java ME Home The Java Spotlight Podcast on Twitter 71

72 <Insert Picture Here> Questions? For more information on Java SE for Embedded: 72