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    Embedded erlang-fscons-2010 Embedded erlang-fscons-2010 Presentation Transcript

    • Erlang Solutions Ltd. Embedded Erlang Development environment for Embedded Erlang Fredrik Andersson, Niclas Axelsson, Fabian Bergström, Christoffer Ferm, Henrik Nordh, Gustav Simonsson Erlang Solutions Ltd. FSCONS Gothenburg, November 2010
    • Background • Thesis projects – Uppsala University and Erlang Solutions • Embedded Platform – OS platform for embedded devices • Embedded Erlang – Erlang on embedded devices • Erlang VM Extensions – Better hardware utilization • Framework for data sharing – Automatic data sharing Copyright 2010 Erlang Solutions, Ltd
    • Motivation Copyright 2010 Erlang Solutions, Ltd
    • Erlang • Development started 1987 at Ericsson Computer Science Lab. Released as opensource 1998, Ericsson is still the active maintainer • Native support for SMP and Concurrency using message passing • History in Telecom buisness. Designed with Robustness and Low Down Time in mind. • Used by among others, Facebook (Facebook chat), T-Mobile (WAP, SMS), Klarna (e-commerce) Copyright 2010 Erlang Solutions, Ltd
    • Henrik Nordh, Gustav Simonsson Embedded Platform
    • Embedded OS Usage Copyright 2010 Erlang Solutions, Ltd
    • Goals • Minimal Linux system with Erlang and tools • Different versions for different purposes • Easy-to-install package • Reduce time-to-productivity for embedded Erlang developers Copyright 2010 Erlang Solutions, Ltd
    • Metrics • Evaluating Linux distributions – memory – disk usage – boot times – harware support • Embedded focus Copyright 2010 Erlang Solutions, Ltd
    • Allocated Memory After Boot Modified Ångström Ångström minimal-image Debian-5.0-lenny-arm Ångström console-image Ubuntu-10.04-minimal-armel 0 5 10 15 20 25 30 Copyright 2010 Erlang Solutions, Ltd
    • Root File System Size Our Modified Ångström Ångström minimal-image Debian-5.0-lenny-arm Ångström console-image Ubuntu-10.04-minimal-armel 0 50 100 150 200 250 300 Copyright 2010 Erlang Solutions, Ltd
    • The Ångström Distribution • Linux for embedded devices • Smallest image uses 11 MB disk, 16.2 MB memory • Default distribution for several devices – BeagleBoard – Gumstix – Pandora (portable gaming console) • Easy to customise with OpenEmbedded Copyright 2010 Erlang Solutions, Ltd
    • OpenEmbedded • Framework for building embedded Linux Distributions • Several hardware architectures • 1000+ packages pre-defined • Quite complex, but powerful • Handles dependencies, sources, configuration, cross- compilation etc. Copyright 2010 Erlang Solutions, Ltd
    • uClibc • Much smaller than glibc, smaller than EGLIBC • Source compatible with glibc, not binary compatible • Highly configurable Copyright 2010 Erlang Solutions, Ltd
    • BusyBox • Smaller versions of UNIX utilities in a single binary • Written with size-optimisation and limited resources in mind • Very modular and configurable • Well-tested against uClibc Copyright 2010 Erlang Solutions, Ltd
    • Maintaining Different Versions • “Minimal” • “Debug” • “Extended” • Binary installation packages for common platforms • Latest Erlang version included Copyright 2010 Erlang Solutions, Ltd
    • Fredrik Andersson, Fabian Bergström Adapting Erlang for Embedded Systems
    • Goals The Virtual machine must be adapted to the limited resources of embedded systems. • Low RAM consumption – How can we reduce RAM usage? – How will this impact performance? • Low Disk usage – How can we keep disk usage low? – Performance? • Benchmarks, analysis and documentaion. Copyright 2010 Erlang Solutions, Ltd
    • Progress, Memory Usage 80k 60k 60k 70k 60k 70k 60k 60k 80k 60k 70k 70k 60k 60k 60k 60k 60k 60k 60k 60k 60k 60k Copyright 2010 Erlang Solutions, Ltd
    • Progress, Disk Usage Size on disk 7 6 5 Megabytes 4 3 2 1 0 Compressed Applications Vanilla Erlang -Os, strip, stripped beams Copyright 2010 Erlang Solutions, Ltd
    • Progress, Hardware • VM compiled for Gumstix, BeagleBoard – BeagleBoard is a prototyping platform – Gumstix is a much smaller system for commercial use • TI OMAP35x – Another thesis project for OpenGL and DSP from Erlang Copyright 2010 Erlang Solutions, Ltd
    • The Future • Support for more hardware – Pandaboard, utilizing the latest multicore ARM processor • Documentation for embedded Erlang development – How should you utilize Erlang tools for handling project mangement • Real world application – Small measuring nodes in larger distributed systems Copyright 2010 Erlang Solutions, Ltd
    • Christoffer Ferm Adding support for special purpose computing units to the Erlang VM
    • Erlang VM Charasterics • Good support for SMP – Added in 2006 • Easy approach to utilizing SMP for developers – Message passing – Lightweight processes Copyright 2010 Erlang Solutions, Ltd
    • Modern Processing Units • CPU – Already supported • GPU – OpenCL – Other GPGPU • Digital Signal Processor • Cryptoprocessors Copyright 2010 Erlang Solutions, Ltd
    • Niclas Axelsson Framework for Data Exchange Between Mobile Nodes
    • Introduction • Mobile devices with limited resources – Phones – Cars • Dynamic ad-hoc networks • Delay tolerant data Copyright 2010 Erlang Solutions, Ltd
    • Features • Written in Erlang • Simple to configure • Takes care of the communication between nodes • Handles storage of data • A subscription system Copyright 2010 Erlang Solutions, Ltd
    • Example Applications • Music player – share songs • Announcement systems • Statistics gathering Copyright 2010 Erlang Solutions, Ltd
    • The erlang-embedded homepage
    • www.erlang-embedded.com • First release “Stag Beetle” is already out. – Next release is scheduled around the 16th of november • Mailinglist – erlang-embedded@googlegroups.com • Github – http://github.com/esl/erlang-embedded Copyright 2010 Erlang Solutions, Ltd
    • Thank you Questions? Copyright 2010 Erlang Solutions, Ltd
    • The Hardware Copyright 2010 Erlang Solutions, Ltd
    • Embedded Market • 2006: 4 billion embedded processors sold worldwide • 2010: 16 billion • 2020: 40 billion • Intel estimates 15 billion will be connected in swarms or over the Internet by 2015 • ARM announced embedded multi-core CPU in okt 2009 Copyright 2010 Erlang Solutions, Ltd