easygraphics

systemd는 /etc/systemd 아래에 설정파일을 두고 있다 시스템에 미리 정의 된 Service, Target 파일을 통해서 시스템을 컨트롤 /etc/systemd에서 설정하면서 심볼릭 링크를 통해서 사용 바이너리 실행파일은 아래 경로에서 확인 가능하며 $ ls /lib/systemd/ 기본적인 시스템의 Service, Target은 아래에 위치하고 있다 $ ls /lib/systemd/system ls -al /etc/systemd/system/multi-user.target.wants remote-fs.target -> /lib/systemd/system/remote-fs.target Run Level 변경 Troubleshooting of systemd and fsck on boot htt..

Cortex-A(ARMv8, ARMv7), Cortex-M, Coretex-R, Classic, SecureCore Cortex-A Cortex-M Cortex-R Classic Secure

LXC•어플리케이션의 고립 환경을 지원하기 위해 리눅스 커널의 cgroup과 namespace 기능을 조합하여 만든 framework •Cgroup: 리소스(CPU, memory, disk, I/O, network, etc) 사용에 대한 제한, 점유, 고립을 지원üResource controlüFilesystem accessüGeneral device accessüMemory resourcesüNetwork device resourcesüCPU bandwidthüBlock device IO bandwidthüVarious other aspects of a control group's view of the system••Namespace: 리소스들을 서로 다른 네임스페이스 그룹으로 나눠서, 다른 네임스페이..

Asymmetric Multi-processing (AMP) = 비대칭 coreSymmetric Multi-processing (SMP) = 대칭 core ARM & Linux change to AMP mode (ARM cp15 register,)Define Cache initialize schemeDefine GIC initialize & distribute to coreCore Communication rule(IPI, SharedM, scretch register)...... AMP & SMP of Multicore processor reference: http://www.embedded.com/design/mcus-processors-and-socs/4429496/Multicore-basics L..

Status: Build & weston is success, but weston-simple-egl is not working Building Weston on Rasberrypi(raspbian) # flashing latest raspbian image in host linuxhttps://www.raspberrypi.org/downloads/raspbian/https://www.raspberrypi.org/documentation/installation/installing-images/linux.md # update & upgrade rasbiansudo apt-get updatesudo apt-get dist-upgrade# wayland-build-tools clone (Made by Bryc..

Building Weston on Ubuntu 16.04 # wayland-build-tools clone (Made by Bryce Harrington)git clone https://github.com/bryceharrington/wayland-build-tools.git # Set build environmentcp wl_defines.sh ~/bin/mkdir ~/buildmkdir ~/build/Wayland # Install wayland build dependencies./wl_install_deps # Fail case: I got build error in mesa package in "wl_build" script so I fixed it like below --with-gallium-..

Raspberrypi kernel githttps://github.com/raspberrypi/linux.gitWayland build tools githttps://github.com/bryceharrington/wayland-build-tools.gitBuilding Weston image with Yocto for Raspberry pihttp://fabienlahouderepro.blogspot.kr/2017/03/building-weston-image-with-yocto-for.html My opinion: Working fine, but wayland is too slow... why... I don't know... AGL for Raspberry Pihttps://wiki.automotiv..

Mesa-Open-source implementation of the OpenGL specification -Implements a vendor-independent translation layer between a graphics API such as OpenGL and the graphics hardware drivers in the operating system kernel

Weston/Wayland IVI Extensions •Well-defined interface•Standardized compositing•Separation of HMI and Layer Management•Dynamically Extensions during runtime •Low integration complexity - Each application create wayland surface- Each wayland surface is mapped to ivi surface for being managed by HMI - HMI manages ivi surface with Layers which group surfaces Component diagram ivi-shell.so: -Implemen..

1. Shared surface(the surface whose ID is set of simple-ivi-share argument) does eglSwapBuffers 2. The ivi-share catchs attach event and get buffer object by using libgbm.3. By using libdrm, ivi-share gets drm_gem_flink. The gem is the drm object which represent the buffer.4. The ivi-share sends drm_gem_flink.name to simple-ivi-share app.5. The simple-ivi-share app calls EglCreateImageKHR() to g..