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Icecc is a distributed compiler that allows compilation jobs to be distributed across multiple computers to reduce build times. It works by having one computer act as a scheduler that distributes preprocessing, compilation, and assembly jobs to other connected computers. The key requirements are that all computers must have the same toolchain installed and be on a fast network. Setting up Icecc involves configuring one computer as the scheduler, installing Icecc on all computers, and ensuring all toolchains are packaged and accessible in a shared location. Icecc has been shown to reduce Linux kernel compilation time by 75% by utilizing 3 additional computers during the build.

Software update for embedded systems

Embedded Linux/ Debian with ARM64 Platform

Lavigne bsdmag-jan13

Fast boot

This document discusses methods for reducing Linux boot times, focusing on hardware architecture, the boot process, kernel optimizations, and the init system. It recommends using faster storage like SSDs, optimizing bootloaders like GRUB, improving kernel decompression with LZ4, disabling unnecessary processes, and switching to systemd for network configuration to reduce boot times to as little as 2 seconds.

Bringing-it-all-together-overview-of-rpm-packaging-in-fedora

Lalatendu Mohanty

This document discusses RPM packaging in Fedora. It begins by explaining why packaging is important, noting that it automates software installation and management while preventing errors. It then describes RPM, the package format used in Fedora and other distributions. The document outlines the RPM build process using tools like rpmbuild and spec files. It also introduces services like Koji, which builds RPMs, distribution git repositories for packages, Bodhi for release management, and COPR for alternative builds. It concludes by recommending ways for readers to get involved in Fedora packaging.

Select, manage, and backport the long term stable kernels

The document discusses selecting and managing Linux kernel versions, including mainline, stable, and long-term kernels. It notes mainline kernels are released every 2-3 months with new features, while stable kernels receive only bug and security fixes. Long-term kernels provide long-term support with backported fixes for older releases. The document recommends using a release version over rolling versions for stability and outlines practices for monitoring kernels and addressing regressions.

The document discusses Macpaul Lin's experience porting U-boot to the NDS32 architecture and sharing lessons learned from open source embedded software development. It covers the software architecture of U-boot, the boot process, code commit rules, patch workflow, and coding style guidelines. The presentation provides an introduction and technical overview of porting U-boot to a new CPU architecture.

Learning notes on Open Source License

This document discusses open source licenses. It begins by introducing open source/free software and different types of intellectual property like copyrights and patents. It then explains key open source licenses like the GPL, LGPL, Apache, MIT and their different permissions and conditions. Popular open source licenses used on GitHub are also shown. The document provides answers to common questions about open source licensing and references for further information.

BKK16-309A Open Platform support in UEFI

Configure, Pack and Distribute: An RPM Creation Workshop

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This session is for you if: You are an ISV who wants to create appliances from your software You are a customer with your own software development team who wants to package this software for deploying it in the data center—as a package or on your self-built appliance You have trouble with your data center due to commercial software that is not packaged in a secure and maintainable way In this workshop you will learn how to build Linux RPM packages. We will demonstrate packaging from source code, and for commercial software (existing as a tar-ball). You will learn best practices and get links to further information.

Olf2012

The document discusses customizing FreeNAS 8.3 by using plugins jails. It describes installing the plugins jail, installing and configuring pre-built plugin binaries (PBIs), and installing non-PBI software. It also covers creating custom PBIs by developing PBI modules with installation instructions and a control file to integrate them into the FreeNAS GUI. The plugins jail provides an isolated environment for running additional software on the NAS while avoiding conflicts with the core system.

What is the merge window?

The merge window is a period of time directly after a software release when many patches are merged. This allows patches a long time to be scrutinized and tested before the next release. During the merge window, which typically lasts two weeks for the Linux kernel, maintainers focus on quickly reviewing and merging new patches, while testing of the new patches occurs in the following release candidates period. Aligning development work with merge windows helps ensure patches are reviewed and integrated efficiently.

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LAS16-400K2: TianoCore – Open Source UEFI Community Update Speakers: Brian Richardson Date: September 29, 2016 ★ Session Description ★ Title: TianoCore – Open Source UEFI Community Update The TianoCore project hosts EDK II, an open source implementation of the Unified Extensible Firmware Interface (UEFI). EDK II has become the defacto UEFI implementation for ARM and Intel platforms, expanding standards based firmware across multiple architectures. This keynote will provide an update on the current status of the TianoCore project, plans for future improvements, and a discussion of why firmware is critical in today’s digital ecosystem. Bio Brian Richardson is an Intel technical evangelist who has spent most of his career as a “BIOS guy” working on the firmware that quietly boots billions of computers. Brian has focused on the industry transition to the Unified Extensible Firmware Interface (UEFI), demystifying how firmware works and simplifying firmware development tools. Brian has presented at LinuxCon, UEFI Plugfests, and Intel Developer Forum. He is a blogger for the Intel Software Evangelists project, former writer forlinux.com, and (apropos of nothing) executive producer for DragonConTV. ★ Resources ★ Watch the video: https://www.youtube.com/watch?v=kQ5X8vqdSu0 Etherpad: pad.linaro.org/p/las16-400k2 Presentations & Videos: http://connect.linaro.org/resource/las16/las16-400k2/ ★ Event Details ★ Linaro Connect Las Vegas 2016 – #LAS16 September 26-30, 2016 http://www.linaro.org http://connect.linaro.org

Embedding Linux For An Automotive Environment

FSCONS

Running Linux on an embedded node in the automotive environment adds a number of new challenges that have to be addressed. One of the problems we have been working on is start-up times. We have trimmed the start-up time of the Linux kernel in less than 0.2 seconds on low end hardware. This presentation will look into and discuss some of the trade-offs we did to get the system starting up quicker on a limited hardware. In an automotive environment many systems have to have there communication up within factions of a second, as the car get more complex more CPU power is needed in many different places. Traditional automotive solutions have been using two CPU’s on each node one small quick starting to handle the communication and one for the applications. If only one CPU can get the main applications starting quick enough that can make the hardware both simpler and cheaper. About Mecel Mecel is a systems and software development company with more than 25 years of experience in developing solutions for the automotive industry. We specialize in in-car communication technologies, user interface development and consumer device interaction.

NIH package manager for pkgsrc

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Anne Nicolas

This document summarizes the talk "GCC 4.8, State of the Onion" given by Dodji Seketeli at the Distro Recipes Conference in Paris, France in April 2013. It discusses the two phase development process for GCC, highlights significant changes in GCC 4.8 related to diagnostics, language support, optimizations, processor support, and architecture changes. Specific improvements mentioned include better diagnostic output, C++11 support, new optimization options like -Og, support for new processors like ARM Cortex-A53/A57 and Intel Broadwell, and function multi-versioning in G++.

Devsummit 2010

The document discusses ways that the FreeBSD and PC-BSD projects can better coordinate their efforts to address bugs and issues found by desktop users. It suggests improving communication between various teams involved in ports management, window managers, graphics drivers, and hardware support. The goal is to streamline feedback loops and prioritize fixes for usability problems reported by non-technical desktop users of PC-BSD.

Flourish11

PC-BSD is a desktop-oriented operating system based on FreeBSD that aims to provide an easy-to-use graphical environment. It differs from FreeBSD in providing a graphical installer, pre-configured desktop and multimedia support. It differs from Linux in using BSD-style filesystems, devices names and commands. The presentation covered current PC-BSD features like software management and system utilities, and plans for the upcoming 9.0 release including changes to the PBI format and allowing selection of desktop environments. Community involvement was encouraged through tasks like testing, documentation and translations.

Oclug 2010

This document summarizes the key differences between BSD and Linux operating systems. It explains that BSD began as patches to Unix from UC Berkeley and later forked into multiple projects with different focuses, like FreeBSD for stability and NetBSD for portability. It outlines differences in features like device naming, startup processes, and configuration files compared to Linux. The document also discusses advantages of BSD's integrated release engineering model and highlights unique BSD features like jails, packages, and security tools.

Slimline Open Firmware

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This document outlines a process for volunteers to join a U-boot source code cleanup project. It explains that U-boot contains old code that could benefit from standardization. Volunteers would use git and mailing lists to identify unclean code, fix issues found by checkpatch.pl, and submit cleanup patches for review. The goal is to organize contributions to improve code quality and make U-boot easier for new developers to understand and modify.

[ELCE] Activities of super long term support kernel workgroup in civil infras...

The document summarizes the activities of the Super Long Term Support Kernel Workgroup in the Civil Infrastructure Platform Project. It discusses the workgroup's maintenance of Linux kernels for over 10 years, including applying real-time patches and maintaining the kernels as the CIP-RT version. Key tasks include participating in the Linux LTS review process, releasing CIP SLTS kernels, tracking CVEs and failed patches for the CIP kernels. The workgroup aims to provide industrial-grade, sustainable and secure kernels for critical infrastructure projects.

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This document describes an SDK (Software Development Kit) for firmware development. It outlines the need for an SDK, the software architecture of an SDK including its layering and structure, and the benefits of using an SDK. The SDK provides APIs that abstract low-level hardware details and simplify development. It includes components like drivers, libraries, header files, and sample code to access hardware peripherals. Using an SDK promotes code reuse, reduces development time, and allows for easier upgrades and migration between platforms.

101 2.5 use rpm and yum package management

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This document discusses Linux system performance tuning. It defines benchmarks as repeatable performance measurements taken under consistent conditions. It provides examples of common benchmarking tools like hdparm, compiling software, lmbench, and iozone. It also discusses establishing baselines, collecting benchmarks in single-user mode, and averaging results. Finally, it lists some performance tricks like disabling atime, binding processes to CPUs, tuning memory and swap, implementing RAID, and disabling SELinux.

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