DOCSLIB.ORG

From Zero to Zero-Copy Accelerating Your Embedded Media Player

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
From Zero to Zero-Copy Accelerating Your Embedded Media Player From Zero to Zero-Copy Accelerating Your Embedded Media Player Lukas Rusak September 2018 whoami Kelowna B.C and Okanagan Lukas Rusak Lake Bachelors of Applied Science in Mechanical Engineering Team Kodi Member Team LibreELEC Member LibreELEC Board Member Okanagan Region of B.C. [email protected] Mission Hill Vineyard Agenda ● Introducing zero-copy ● Current proprietary methods ● Open source solutions ● Video decoding pipeline ● Rendering methods ● Board specifics Zero-copy "Zero-copy" describes computer operations in which the CPU does not perform the task of copying data from one memory area to another. [1] ● Embedded devices with minimal CPU power trying to run 4K HEVC video ● Critical for devices with limited memory bandwidth ● Available in proprietary and open source solutions Current Proprietary Methods ● Raspberry Pi (broadcom) dispmanx ○ libbcm_host ● i.MX6 Vivante ○ Blob that does everything for windowing and rendering ○ libvpuwrap for decoding ● Amlogic libamcodec ○ Userspace library dependent of vendor BSP Kernel (3.14) ● Impossible to fix bugs ● Locked to vendor kernels ● No chance to update ● Code maintenance for vendor specific methods Open Source Solutions ● Video 4 Linux 2 (V4L2) Driver ○ Access to onboard decoding capabilities ○ Memory-to-Memory devices ○ Codecs are hardware and driver dependent ● Direct Rendering Manager (DRM) Driver ○ Only required if utilizing direct to plane rendering ● OpenGLES 2.0 and EGL ○ Only required if utilizing EGL image import to OpenGLES ○ EXT_image_dma_buf_import [2] ○ OES_EGL_image_external [3] ○ NV12 or YUYV or YU12 or similar YUV format support Video Decoding Pipeline Compressed ● V4L2 interface directly using IOCTL’s Frame ● Gstreamer ○ dma-buf ready ● FFmpeg Decoder ○ dma-buf patches under review AVDRMFrameDescriptor ● Using Gstreamer or FFmpeg shifts video decoding out of your application Decoded fd Frame Direct to Plane Rendering Positives Video + GUI ● Embedded devices may support YUV formats directly ● Most performant (no empirical evidence) ● No OpenGLES/EGL context required ○ Skips the GPU entirely ● Video overlays are possible using DRM Planes ● Very straight forward when using atomic DRM GUI Only Negatives ● Requires* in driver scaling capabilities ● No OpenGLES capabilities (shaders) ● More complex if using multiple planes Primary Overlay Cursor (DRM Planes) OpenGLES/EGL Image Import Positives ● Shader support ● Only one DRM Plane required Negatives ● More expensive (requires EGL context and GLES operations) ● Requires extensions that are less common Mali Proprietary Blob ● Open source kernel module paired with closed source binary blob for OpenGLES ● Licensed from ARM ● Bundled library containing either: ○ x11 ○ Wayland/GBM ○ GBM ● Impossible to fix bugs ● Lima and Panfrost open source efforts underway Allwinner ● DRM Driver ● OpenGLES Driver ○ “sun4i” ○ “mali” ○ Supports scaling ○ Supports EGL import ○ Supports overlays ○ Supports NV12 ○ Supports NV12 ● V4L2 Driver ○ Patches pending (requires V4L2 request API) ○ Supports NV12 Orange Pi PC Amlogic ● DRM Driver ● OpenGLES Driver ○ “meson” ○ “mali” ○ Supports Scaling (WIP) ○ Supports EGL import ○ Supports Overlays (WIP) ○ Supports NV12 ○ Supports NV12 ○ Neil Armstrong <[email protected]> ● V4L2 Driver ○ “Meson” (WIP) ○ Supports NV12 ○ Supports HEVC, H264 ○ Maxime Jourdan <[email protected]> Libre Computer Le Potato (S905) Broadcom ● DRM Driver ● OpenGLES Driver ○ “vc4” ○ “vc4” ○ Supports scaling ○ No YUV import ○ Supports overlays ○ Supports NV12 and YUV420 ● V4L2 Driver ○ “Bcm2835-v4l2-codec” (WIP) ○ Supports NV12 and YUV420 Raspberry Pi 3B+ NXP ● DRM Driver ● OpenGLES Driver ○ “imx” and “etnaviv” ○ “etnaviv” ○ No scaling (available via a separate ip) ○ Supports EGL import ○ Supports overlays ○ Supports NV12 (WIP) ○ Supports NV12 ■ Target mesa 18.3 ■ gc3000 good performance ● V4L2 Driver ■ gc2000 ok performance ○ “coda” ○ Supports NV12 Solidrun Cubox i4-Pro (gc2000) Qualcomm ● DRM Driver ● OpenGLES Driver ○ “msm” ○ “freedreno” ○ Supports scaling ○ Supports EGL import ○ Supports overlays ○ Supports NV12 ○ Supports NV12 ● V4L2 Driver ○ “venus” ○ Supports NV12 Dragonboard 410c Others HiSilicon MediaTek Renesas Rockchip Asus Tinkerboard S (RK3288) Renesas R-Car Index 1. https://en.wikipedia.org/wiki/Zero-copy 2. https://www.khronos.org/registry/EGL/extensions/EXT/EGL_EXT_image_dma_buf_import.txt 3. https://www.khronos.org/registry/OpenGL/extensions/OES/OES_EGL_image_external.txt Kodi Implementation Links: https://github.com/xbmc/xbmc/tree/master/xbmc/windowing/gbm https://github.com/xbmc/xbmc/blob/master/xbmc/cores/VideoPlayer/VideoRenderers/HwDecRender/RendererDRMPRIME.cpp https://github.com/xbmc/xbmc/blob/master/xbmc/cores/VideoPlayer/VideoRenderers/HwDecRender/RendererDRMPRIMEGLES.cpp https://github.com/xbmc/xbmc/blob/master/xbmc/cores/VideoPlayer/DVDCodecs/Video/DVDVideoCodecDRMPRIME.cpp Q/A Theme By: Samfisher Design .
Load more

Recommended publications
  • Open Source Projects As Incubators of Innovation
    RESEARCH CONTRIBUTIONS TO ORGANIZATIONAL SOCIOLOGY AND INNOVATION STUDIES / STUTTGARTER BEITRÄGE ZUR ORGANISATIONS- UND INNOVATIONSSOZIOLOGIE SOI Discussion Paper 2017-03 Open Source Projects as Incubators of Innovation From Niche Phenomenon to Integral Part of the Software Industry Jan-Felix Schrape Institute for Social Sciences Organizational Sociology and Innovation Studies Jan-Felix Schrape Open Source Projects as Incubators of Innovation. From Niche Phenomenon to Integral Part of the Software Industry. SOI Discussion Paper 2017-03 University of Stuttgart Institute for Social Sciences Department of Organizational Sociology and Innovation Studies Seidenstr. 36 D-70174 Stuttgart Editor Prof. Dr. Ulrich Dolata Tel.: +49 711 / 685-81001 [email protected] Managing Editor Dr. Jan-Felix Schrape Tel.: +49 711 / 685-81004 [email protected] Research Contributions to Organizational Sociology and Innovation Studies Discussion Paper 2017-03 (May 2017) ISSN 2191-4990 © 2017 by the author(s) Jan-Felix Schrape is senior researcher at the Department of Organizational Sociology and Innovation Studies, University of Stuttgart (Germany). [email protected] Additional downloads from the Department of Organizational Sociology and Innovation Studies at the Institute for Social Sciences (University of Stuttgart) are filed under: http://www.uni-stuttgart.de/soz/oi/publikationen/ Abstract Over the last 20 years, open source development has become an integral part of the software industry and a key component of the innovation strategies of all major IT providers. Against this backdrop, this paper seeks to develop a systematic overview of open source communities and their socio-economic contexts. I begin with a recon- struction of the genesis of open source software projects and their changing relation- ships to established IT companies.
    [Show full text]
  • MINCS - the Container in the Shell (Script)
    MINCS - The Container in the Shell (script) - Masami Hiramatsu <[email protected]> Tech Lead, Linaro Ltd. Open Source Summit Japan 2017 LEADING COLLABORATION IN THE ARM ECOSYSTEM Who am I... Masami Hiramatsu - Linux kernel kprobes maintainer - Working for Linaro as a Tech Lead LEADING COLLABORATION IN THE ARM ECOSYSTEM Demo # minc top # minc -r /opt/debian/x86_64 # minc -r /opt/debian/arm64 --arch arm64 LEADING COLLABORATION IN THE ARM ECOSYSTEM What Is MINCS? My Personal Fun Project to learn how linux containers work :-) LEADING COLLABORATION IN THE ARM ECOSYSTEM What Is MINCS? Mini Container Shell Scripts (pronounced ‘minks’) - Container engine implementation using POSIX shell scripts - It is small (~60KB, ~2KLOC) (~20KB in minimum) - It can run on busybox - No architecture dependency (* except for qemu/um mode) - No need for special binaries (* except for libcap, just for capsh --exec) - Main Features - Namespaces (Mount, PID, User, UTS, Net*) - Cgroups (CPU, Memory) - Capabilities - Overlay filesystem - Qemu cross-arch/system emulation - User-mode-linux - Image importing from dockerhub And all are done by CLI commands :-) LEADING COLLABORATION IN THE ARM ECOSYSTEM Why Shell Script? That is my favorite language :-) - Easy to understand for *nix administrators - Just a bunch of commands - Easy to modify - Good for prototyping - Easy to deploy - No architecture dependencies - Very small - Able to run on busybox (+ libcap is perfect) LEADING COLLABORATION IN THE ARM ECOSYSTEM MINCS Use-Cases For Learning - Understand how containers work For Development - Prepare isolated (cross-)build environment For Testing - Test new applications in isolated environment - Test new kernel features on qemu using local tools For products? - Maybe good for embedded devices which has small resources LEADING COLLABORATION IN THE ARM ECOSYSTEM What Is A Linux Container? There are many linux container engines - Docker, LXC, rkt, runc, ..
    [Show full text]
  • LVC20-108 Arm64 Linux Kernel Architecture Update
    Arm64 Linux Kernel architecture update Matteo Carlini Director, Software Technology Management Arm – Open Source Software A-profile Architecture new feature names! https://developer.arm.com/architectures/cpu-architecture/a-profile/exploration-tools/feature-names-for-a-profile A-profile features: arm64 kernel support table https://developer.arm.com/tools-and-software/open-source-software/linux-kernel/architecture-and-kvm-enablement A-class architecture kernel enablement – Mar 20 TTS2UXN A64ISA AA32HPD PAUTH CNTS PMU S2FW FHM TTPBHA C B Trace LSE LSE IESB LSMAOC Debug SHA PMU RDMA CompNum JSconv S-EL2 SM SM TTCNP TTST VMID16 HPD v8.3 DIT SHA UAO v8.1 v8.2 RAS v8.4 IDST RCPC CCIDX DotProd ATS1E1 LOR VHE DFE CondM TTRe NV RCPC RAS LP16 m PAN TTHM MPAM AMU TTL NV Debug LVA TLBI VPIPT LPA DCPOP EVT DoPD GTG ECV MTPMU ETS SVE2 SPE SpecRest MPAM CTSS PMU PredInv PAuth2/ Future FGT FPAC architectures v8.0 RNG BT v8.5 v8.6 F64MM DGH DCCVADP MemTag Enablement complete TME EOPD CSEH F32MM TWED Enablement ongoing Enablement TBD SB CMODX I8MM BF16 FRINT CondM AMU N/A – no Kernel impact A-class architecture kernel enablement – Today TTS2UXN A64ISA AA32HPD PAUTH PMU FHM TTPBHA CNTSC S2FWB S-EL2 LSE LSE IESB LSMAOC TTST SHA PMU RDMA CompNum JSconv RAS SM SM TTCNP VMID16 HPD v8.3 DFE DIT SHA UAO TTRem v8.4 v8.1 v8.2 IDST RCPC CCIDX DotProd ATS1E1 LOR VHE Trace CondM NV Debug RCPC RAS LP16 PAN TTHM MPAM AMU Debug LVA NV TLBI TTL VPIPT LPA DCPOP GTG SPE SpecRest ECV MTPMU ETS SVE2 PMU PredInv MPAM CTSS RNG MemTag PAuth2/ Future FGT FPAC architectures v8.0
    [Show full text]
  • Hdcp Support in Optee
    HDCP SUPPORT IN OPTEE PRODUCT PRESENTATION Linaro Multimedia Working Group MICR ADVANCED TECHNOLOGIES • https://www.linaro.org/ SEPTEMBER 2019 Agenda • Quick introduction to HDCP • Secure Video Path overview • Current HDCP control in Linux • Proposal to control HDCP in OPTEE • Questions HDCP OVERVIEW 3 HDCP : High bandwidth Digital Content Protection • A digital copy protection developed by Intel™ to prevent copying of digital and audio video content. Before sending data, the source device shall check the destination device is authorized to received it. If so, the source device encrypts the data, only the destination device can decrypt. - data encryption - prevent non-licensed devices from receiving content • Android and Linux NXP bsp manage HDCP at Linux Level, through libDRM. So nothing prevent a user to disable HDCP protection while secure content is under playback. It is a security holes in the Secure Video Path. • HDCP support currently under development for wayland/Weston: https://gitlab.freedesktop.org/wayland/weston/merge_requests/48 • No Open Source solution exists to manage HDCP in secure mode. • HDCP versions: ▪ HDCP 1.X: Hacked: Master key published (leak/reverse engineering) ▪ HDCP 2.0: Hacked before release ▪ HDCP 2.1: Hacked before release ▪ HDCP 2.2: Not yet hacked 4 ▪ HDCP 2.3: Not yet hacked HDCP control state Machine Content with HDCP protection mandatory no yes Local display Local display yes no yes no Video displayed Video displayed without HDCP Digital Display without HDCP Digital Display encryption encryption yes no yes no It means we have analog display Video displayed Video displayed HDCP supported without HDCP HDCP supported without HDCP encryption encryption yes no yes no Video displayed Video displayed without Widevine/PlayReady To Video not displayed Application to decide if HDCP check current HDCP version Application to display a Warning 5 HDCP encryption message HDCP Unauthorized, encryption to be used >= expected HDCP version Content Disabled.' Error.
    [Show full text]
  • Implantación De Linux Sobre Microcontroladores
    Embedded Linux system development Embedded Linux system development DSI Embedded Linux Free Electrons Developers © Copyright 2004-2018, Free Electrons. Creative Commons BY-SA 3.0 license. Latest update: March 14, 2018. Document updates and sources: http://free-electrons.com/doc/training/embedded-linux Corrections, suggestions, contributions and translations are welcome! DSI - FCEIA http://dsi.fceia.unr.edu.ar 1/263 Derechos de copia © Copyright 2018, Luciano Diamand Licencia: Creative Commons Attribution - Share Alike 3.0 http://creativecommons.org/licenses/by-sa/3.0/legalcode Ud es libre de: I copiar, distribuir, mostrar y realizar el trabajo I hacer trabajos derivados I hacer uso comercial del trabajo Bajo las siguientes condiciones: I Atribuci´on. Debes darle el cr´editoal autor original. I Compartir por igual. Si altera, transforma o construye sobre este trabajo, usted puede distribuir el trabajo resultante solamente bajo una licencia id´enticaa ´esta. I Para cualquier reutilizaci´ono distribuci´on,debe dejar claro a otros los t´erminos de la licencia de este trabajo. I Se puede renunciar a cualquiera de estas condiciones si usted consigue el permiso del titular de los derechos de autor. El uso justo y otros derechos no se ven afectados por lo anterior. DSI - FCEIA http://dsi.fceia.unr.edu.ar 2/263 Hiperv´ınculosen el documento Hay muchos hiperv´ınculosen el documento I Hiperv´ıncluosregulares: http://kernel.org/ I Enlaces a la documentaci´ondel Kernel: Documentation/kmemcheck.txt I Enlaces a los archivos fuente y directorios del kernel: drivers/input include/linux/fb.h I Enlaces a declaraciones, definiciones e instancias de los simbolos del kernel (funciones, tipos, datos, estructuras): platform_get_irq() GFP_KERNEL struct file_operations DSI - FCEIA http://dsi.fceia.unr.edu.ar 3/263 Introducci´ona Linux Embebido Introducci´ona DSI Linux Embebido Embedded Linux Developers Free Electrons © Copyright 2004-2018, Free Electrons.
    [Show full text]
  • SFO17-409 TSC OSS Toolchain Discussion David a Rusling Ryan S
    SFO17-409 TSC OSS Toolchain Discussion David A Rusling Ryan S. Arnold, Maxim Kuvyrkov linaro Committee Confidential @ 2017 Overview ● Toolchain work in Linaro ○ GCC ■ ARM GNU funding to TCWG and the effect on Linaro TCWG's roadmap ■ Transition of GNU toolchain release to ARM in 2018 (august) ■ ARMv8.2 ■ SVE upstream progress ● GDB SVE enablement moving forward ○ LLVM ■ ARMv8.2 ■ LLVM growth roadmap ■ SVE upstream progress ○ ILP32 ■ ILP32 toolchain progress update ○ FDPIC Toolchain ● Discussion ○ Does this all fit together? ○ Is there anything that we’re missing? linaro Committee Confidential @ 2017 ENGINEERS AND DEVICES WORKING TOGETHER Key GNU Deliverables 1.TCWG-1232 Link Time Optimization tuning for AArch64 2.TCWG-64 Sign/Zero-Extension Elimination optimizations 3.TCWG-1233 Investigate scalability of libgomp on SPEC CPU2017 4.TCWG-1207 ILP32 Toolchain 5.TCWG-159 GDB Kernel Awareness 6.TCWG-1035 GDB target description rework for SVE enablement 7.TCWG-1160, TCWG-1161 OpenOCD AArch64 & GDB Remote debugging interoperability 8.TCWG-935 Automated regression testing of upstream branches 9.TCWG-1231 Automated benchmarking of upstream branches linaro Committee Confidential @ 2017 ENGINEERS AND DEVICES WORKING TOGETHER ARM funding of GNU work & Need for LLVM ● High volume of LLVM work needed to be done (see LLVM Growth Roadmap slides). Linaro Exec Mgmt was planning to propose TCWG transition to LLVM in the future. This initial proposal was shared with ARM. ● ARM expressed concern as there is still important GNU work Linaro can do especially on behalf of ARM enterprise workloads. ● ARM has decided to fund three existing (full-time equivalent) TCWG engineers to continue to focus on GNU for at least the next year.
    [Show full text]
  • Is Android the New Embedded Linux?
    Is Android the new Embedded Linux? AnDevCon 2013 Karim Yaghmour [email protected] 1 These slides are made available to you under a Creative Commons Share- Delivered and/or customized by Alike 3.0 license. The full terms of this license are here: https://creativecommons.org/licenses/by-sa/3.0/ Attribution requirements and misc., PLEASE READ: ● This slide must remain as-is in this specific location (slide #2), everything else you are free to change; including the logo :-) ● Use of figures in other documents must feature the below “Originals at” URL immediately under that figure and the below copyright notice where appropriate. ● You are free to fill in the “Delivered and/or customized by” space on the right as you see fit. ● You are FORBIDEN from using the default “About” slide as-is or any of its contents. rd ● You are FORBIDEN from using any content provided by 3 parties without the EXPLICIT consent from those parties. (C) Copyright 2013, Opersys inc. These slides created by: Karim Yaghmour Originals at: www.opersys.com/community/docs 2 About ● Author of: ● Introduced Linux Trace Toolkit in 1999 ● Originated Adeos and relayfs (kernel/relay.c) ● Training, Custom Dev, Consulting, ... 3 1. Why are we asking this question? ● Android is based on Linux ● Android is “embedded” ● Android is extremely popular ● Android enjoys good support from SoC vendors Mostly - The trends are there 4 1.1. Why did Embedded Linux rise? ● EETimes 2005 survey ... http://www.embedded.com/electronics-blogs/- include/4025539/Embedded-systems-survey-Operating- systems-up-for-grabs ● EETimes 2013 survey http://www.slideshare.net/MTKDMI/2013-embedded-market- study-final http://www.eetimes.com/electronics-news/4407897/Android-- FreeRTOS-top-EE-Times--2013-embedded-survey 5 1.2.
    [Show full text]
  • Operating System Support for Run-Time Security with a Trusted Execution Environment
    Operating System Support for Run-Time Security with a Trusted Execution Environment - Usage Control and Trusted Storage for Linux-based Systems - by Javier Gonz´alez Ph.D Thesis IT University of Copenhagen Advisor: Philippe Bonnet Submitted: January 31, 2015 Contents Preface2 1 Introduction4 1.1 Context.......................................4 1.2 Problem.......................................6 1.3 Approach......................................7 1.4 Contribution....................................9 1.5 Thesis Structure.................................. 10 I State of the Art 12 2 Trusted Execution Environments 14 2.1 Smart Cards.................................... 15 2.1.1 Secure Element............................... 17 2.2 Trusted Platform Module (TPM)......................... 17 2.3 Intel Security Extensions.............................. 20 2.3.1 Intel TXT.................................. 20 2.3.2 Intel SGX.................................. 21 2.4 ARM TrustZone.................................. 23 2.5 Other Techniques.................................. 26 2.5.1 Hardware Replication........................... 26 2.5.2 Hardware Virtualization.......................... 27 2.5.3 Only Software............................... 27 2.6 Discussion...................................... 27 3 Run-Time Security 30 3.1 Access and Usage Control............................. 30 3.2 Data Protection................................... 33 3.3 Reference Monitors................................. 36 3.3.1 Policy Enforcement............................. 36 3.3.2
    [Show full text]
  • Secure Data Path on Linux and Nxp I.Mx 8M
    SECURE DATA PATH ON LINUX AND NXP I.MX 8M PRODUCT PRESENTATION MICR ADVANCED TECHNOLOGIES Linaro Multimedia Working Group https://www.linaro.org/ LINARO CONNECT SAN DIEGO 2019 SECURE VIDEO PATH OVERVIEW 2 I.MX 8MQ Secure Video Path with Android bsp – Hong Kong Connect 2018 • Slides: https://www.slideshare.net/linaroorg/hkg18113-secure-data-path-work-with-imx8m • Demos: https://www.youtube.com/watch?v=z27Tl5XkFJ4 3 i.MX 8M : Voice and video processing applications processor • Dedicated hardware for security • Video quality with full 4K Ultra HD resolution and HDR (Dolby Vision, HDR10, and HLG) • Hardware composer (4Kp60): DCSS (Display Controller Sub System) • Highest levels of pro audio fidelity with more than 20 audio channels each @384KHz • DSD512 audio capability • Fully supported on NXP’s 10 and 15-year Longevity Program 4 i.MX 8M SDP (Secure Data Path) at a glance The i.MX 8M security subsystem is configured in a way that only hardware components involved in the decoding and the rendering of the stream have access to the decrypted data: • High Assurance Boot (On Chip ROM with tamper detection). Authenticated and Encrypted boot • ARM TrustZone/TEE and the Central Security Unit (CSU) split the processing between non-secure world running the rich OS, and the secure world running the trusted stack (ATF/OP-TEE from Linaro) • RDC (Resource Domain Controller) to isolate CPU, VPU, GPU, DCSS and memory buffers, using dedicated hardware -> Application CPU cores won’t have physical access to decrypted video memory buffers • CAAM (Cryptographic
    [Show full text]
  • Embedded Linux Size Reduction Techniques
    Embedded Linux Conference 2017 Embedded Linux size reduction techniques Michael Opdenacker free electrons [email protected] free electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 1/1 Michael Opdenacker I Michael Opdenacker I Founder and Embedded Linux engineer at free electrons I Embedded Linux expertise I Development, consulting and training I Strong open-source focus I Long time interest in embedded Linux boot time, and one of its prerequisites: small system size. I From Orange, France Penguin from Justin Ternet (https://openclipart.org/detail/182875/pinguin) free electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 2/1 Why reduce size? There are multiple reasons for having a small kernel and system I Run on very small systems (IoT) I Run Linux as a bootloader I Boot faster (for example on FPGAs) I Reduce power consumption Even conceivable to run the whole system in CPU internal RAM or cache (DRAM is power hungry and needs refreshing) I Security: reduce the attack surface I Cloud workloads: optimize instances for size and boot time. I Spare as much RAM as possible for applications and maximizing performance. See https://tiny.wiki.kernel.org/use_cases free electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/1 Reasons for this talk I No talk about size since ELCE 2015 I Some projects stalled (Linux tinification, LLVM Linux...) I Opportunity to have a look at solutions I didn’t try: musl library, Toybox, gcc LTO, new gcc versions, compiling with Clang..
    [Show full text]
  • Linux Interface Specification Yocto Recipe Start-Up Guide Rev.1.09
    User ’s Manual ’s Linux Interface Specification Yocto recipe Start-Up Guide User’s Manual: Software RZ/G2 group All information contained in these materials, including products and product specifications, represents information on the product at the time of publication and is subject to change by Renesas Electronics Corp. without notice. Please review the latest information published by Renesas Electronics Corp. through various means, including the Renesas Electronics Corp. website (http://www.renesas.com). www.renesas.com Rev.1.09 Aug. 31, 2021 Notice 1. Descriptions of circuits, software and other related information in this document are provided only to illustrate the operation of semiconductor products and application examples. You are fully responsible for the incorporation or any other use of the circuits, software, and information in the design of your product or system. Renesas Electronics disclaims any and all liability for any losses and damages incurred by you or third parties arising from the use of these circuits, software, or information. 2. Renesas Electronics hereby expressly disclaims any warranties against and liability for infringement or any other claims involving patents, copyrights, or other intellectual property rights of third parties, by or arising from the use of Renesas Electronics products or technical information described in this document, including but not limited to, the product data, drawings, charts, programs, algorithms, and application examples. 3. No license, express, implied or otherwise, is granted hereby under any patents, copyrights or other intellectual property rights of Renesas Electronics or others. 4. You shall not alter, modify, copy, or reverse engineer any Renesas Electronics product, whether in whole or in part.
    [Show full text]
  • LAVA Federated Testing Testing with and by the Community
    LAVA federated testing Testing with and by the community Remi Duraffort What’s LAVA? ● Linaro Automated Validation Architecture ● CI system ○ Deploy (kernel, dtb, rootfs, raw image, ...) ○ Boot (linux, android, zephyr, …) ○ Test ● On real hardware: rpi, juno, panda, imx8, … ● Becoming the “de facto” standard Testing without LAVA kernel dtb rootfs Serial relay % power on board % telnet localhost 2000 <enter> Power control => dhcp => setenv serverip 10.3.1.1 => […] => bootm 0x01000000 - 0x03f00000 […] raspberrypi3 login: root # run-test.sh tftp&nfs server […] % power off board Testing with LAVA kernel dtb rootfs Serial relay Job Configuration dispatcher Power control tftp&nfs server Testing with LAVA (full lab) Serial relay Serial relay Users Serial relay Serial relay dispatcher 1 Power control Power control dispatcher 2 Power control Power control server dispatcher N tftp&nfs server Testing with LAVA (user side) ● lavacli jobs submit <job-definition.yaml> ● YAML file ○ device_type: rpi3-b ○ urls: ■ kernel ➢ android ■ dtb ➢ ltp ■ rootfs ➢ ○ auto_login: kselftest ■ prompt ➢ linpack ■ username ➢ v4l2 ○ test repository (git) ➢ ■ https://git.linaro.org/qa/test-definitions.git/ ... Testing with LAVA (admin side) ● Server ● Dispatcher ○ Web UI and API ○ Check boards health ■ Submit jobs ○ Parse logs ■ Results, logs, ... ■ Kernel panic ○ Access control ■ Bootloader error ○ Scheduling ○ Classify errors ■ Priority ■ Infrastructure, Job, Test, Bug, ... ■ Private boards ○ Reproducible ■ Multinode jobs ○ Notifications Supported methods (some) ● Deploy:
    [Show full text]