SlideShare a Scribd company logo

Brief introduction to kselftest

SeongJae Park
SeongJae Park
SeongJae ParkComputer system hacker at SNU

This slides give a brief introduction to kselftest in Linux kernel.

Brief introduction to kselftest

1 of 18
Download to read offline
Brief Introduction to
Kselftest
SeongJae Park <sj38.park@gmail.com>
This work by SeongJae Park is licensed under the Creative
Commons Attribution-ShareAlike 3.0 Unported License. To
view a copy of this license, visit
http://creativecommons.org/licenses/by-sa/3.0/.
These slides were presented during
2nd Korea Linux Kernel Community Meetup
(http://onoffmix.com/event/99896)
Nice To Meet You
SeongJae Park
sj38.park@gmail.com
Part time programmer at KOSSLAB
● Linus Torvalds always want us to test the kernel, but, how?
``Go out and test’’, but, how?
Date: Mon, 19 Jun 2017 23:04:15 +0800
From: Linus Torvalds <torvalds@linux-foundation.org>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Linux 4.12-rc6
...
The good news is that rc6 is smaller than rc5 was, and I think we're
...
Go out and test,
Linus
The Way to Test Kernel
● Simplest way: Build, boot, and use the kernel
○ It covers many important test cases, but limited and not funny (We do this just for fun, right?)
Ad

Recommended

Windowsでも使えるシェル
Windowsでも使えるシェルWindowsでも使えるシェル
Windowsでも使えるシェルTetsuya Hasegawa
 
netfilter and iptables
netfilter and iptablesnetfilter and iptables
netfilter and iptablesKernel TLV
 
Software update for IoT: the current state of play
Software update for IoT: the current state of playSoftware update for IoT: the current state of play
Software update for IoT: the current state of playChris Simmonds
 
OSTree: OSイメージとパッケージシステムの間にGitのアプローチを
OSTree: OSイメージとパッケージシステムの間にGitのアプローチをOSTree: OSイメージとパッケージシステムの間にGitのアプローチを
OSTree: OSイメージとパッケージシステムの間にGitのアプローチをi_yudai
 
Let's trace Linux Lernel with KGDB @ COSCUP 2021
Let's trace Linux Lernel with KGDB @ COSCUP 2021Let's trace Linux Lernel with KGDB @ COSCUP 2021
Let's trace Linux Lernel with KGDB @ COSCUP 2021Jian-Hong Pan
 
[KubeCon NA 2020] containerd: Rootless Containers 2020
[KubeCon NA 2020] containerd: Rootless Containers 2020[KubeCon NA 2020] containerd: Rootless Containers 2020
[KubeCon NA 2020] containerd: Rootless Containers 2020Akihiro Suda
 
【メモ】一般的に設計書に定義される項目例
【メモ】一般的に設計書に定義される項目例【メモ】一般的に設計書に定義される項目例
【メモ】一般的に設計書に定義される項目例Hirokazu Yatsunami
 

More Related Content

What's hot

Understanding eBPF in a Hurry!
Understanding eBPF in a Hurry!Understanding eBPF in a Hurry!
Understanding eBPF in a Hurry!Ray Jenkins
 
UEFIによるELFバイナリの起動
UEFIによるELFバイナリの起動UEFIによるELFバイナリの起動
UEFIによるELFバイナリの起動uchan_nos
 
Kernel Recipes 2017 - Understanding the Linux kernel via ftrace - Steven Rostedt
Kernel Recipes 2017 - Understanding the Linux kernel via ftrace - Steven RostedtKernel Recipes 2017 - Understanding the Linux kernel via ftrace - Steven Rostedt
Kernel Recipes 2017 - Understanding the Linux kernel via ftrace - Steven RostedtAnne Nicolas
 
2015 03 26 社内勉強会_オープンソースソフトウェアライセンスについて
2015 03 26 社内勉強会_オープンソースソフトウェアライセンスについて2015 03 26 社内勉強会_オープンソースソフトウェアライセンスについて
2015 03 26 社内勉強会_オープンソースソフトウェアライセンスについてNatsuki Yamanaka
 
OpenWRT manual
OpenWRT manualOpenWRT manual
OpenWRT manualfosk
 
CNIふぉーびぎなーず
CNIふぉーびぎなーずCNIふぉーびぎなーず
CNIふぉーびぎなーずTomofumi Hayashi
 
Linuxカーネルから紐解くAndroid
Linuxカーネルから紐解くAndroidLinuxカーネルから紐解くAndroid
Linuxカーネルから紐解くAndroiddemuyan
 
CXL_説明_公開用.pdf
CXL_説明_公開用.pdfCXL_説明_公開用.pdf
CXL_説明_公開用.pdfYasunori Goto
 
Slab Allocator in Linux Kernel
Slab Allocator in Linux KernelSlab Allocator in Linux Kernel
Slab Allocator in Linux KernelAdrian Huang
 
YoctoをつかったDistroの作り方とハマり方
YoctoをつかったDistroの作り方とハマり方YoctoをつかったDistroの作り方とハマり方
YoctoをつかったDistroの作り方とハマり方wata2ki
 
HTTPを理解する
HTTPを理解するHTTPを理解する
HTTPを理解するIIJ
 
コンテナネットワーキング(CNI)最前線
コンテナネットワーキング(CNI)最前線コンテナネットワーキング(CNI)最前線
コンテナネットワーキング(CNI)最前線Motonori Shindo
 
A Journey to Boot Linux on Raspberry Pi
A Journey to Boot Linux on Raspberry PiA Journey to Boot Linux on Raspberry Pi
A Journey to Boot Linux on Raspberry PiJian-Hong Pan
 
NFVアプリケーションをOpenStack上で動かす為に - OpenStack最新情報セミナー 2017年7月
NFVアプリケーションをOpenStack上で動かす為に - OpenStack最新情報セミナー 2017年7月NFVアプリケーションをOpenStack上で動かす為に - OpenStack最新情報セミナー 2017年7月
NFVアプリケーションをOpenStack上で動かす為に - OpenStack最新情報セミナー 2017年7月VirtualTech Japan Inc.
 
DMA Survival Guide
DMA Survival GuideDMA Survival Guide
DMA Survival GuideKernel TLV
 

What's hot (20)

Understanding eBPF in a Hurry!
Understanding eBPF in a Hurry!Understanding eBPF in a Hurry!
Understanding eBPF in a Hurry!
 
Linux device drivers
Linux device drivers Linux device drivers
Linux device drivers
 
UEFIによるELFバイナリの起動
UEFIによるELFバイナリの起動UEFIによるELFバイナリの起動
UEFIによるELFバイナリの起動
 
Kernel Recipes 2017 - Understanding the Linux kernel via ftrace - Steven Rostedt
Kernel Recipes 2017 - Understanding the Linux kernel via ftrace - Steven RostedtKernel Recipes 2017 - Understanding the Linux kernel via ftrace - Steven Rostedt
Kernel Recipes 2017 - Understanding the Linux kernel via ftrace - Steven Rostedt
 
2015 03 26 社内勉強会_オープンソースソフトウェアライセンスについて
2015 03 26 社内勉強会_オープンソースソフトウェアライセンスについて2015 03 26 社内勉強会_オープンソースソフトウェアライセンスについて
2015 03 26 社内勉強会_オープンソースソフトウェアライセンスについて
 
Embedded Hypervisor for ARM
Embedded Hypervisor for ARMEmbedded Hypervisor for ARM
Embedded Hypervisor for ARM
 
OpenWRT manual
OpenWRT manualOpenWRT manual
OpenWRT manual
 
CNIふぉーびぎなーず
CNIふぉーびぎなーずCNIふぉーびぎなーず
CNIふぉーびぎなーず
 
Linuxカーネルから紐解くAndroid
Linuxカーネルから紐解くAndroidLinuxカーネルから紐解くAndroid
Linuxカーネルから紐解くAndroid
 
Improve Android System Component Performance
Improve Android System Component PerformanceImprove Android System Component Performance
Improve Android System Component Performance
 
CXL_説明_公開用.pdf
CXL_説明_公開用.pdfCXL_説明_公開用.pdf
CXL_説明_公開用.pdf
 
eBPF maps 101
eBPF maps 101eBPF maps 101
eBPF maps 101
 
Slab Allocator in Linux Kernel
Slab Allocator in Linux KernelSlab Allocator in Linux Kernel
Slab Allocator in Linux Kernel
 
YoctoをつかったDistroの作り方とハマり方
YoctoをつかったDistroの作り方とハマり方YoctoをつかったDistroの作り方とハマり方
YoctoをつかったDistroの作り方とハマり方
 
HTTPを理解する
HTTPを理解するHTTPを理解する
HTTPを理解する
 
コンテナネットワーキング(CNI)最前線
コンテナネットワーキング(CNI)最前線コンテナネットワーキング(CNI)最前線
コンテナネットワーキング(CNI)最前線
 
A Journey to Boot Linux on Raspberry Pi
A Journey to Boot Linux on Raspberry PiA Journey to Boot Linux on Raspberry Pi
A Journey to Boot Linux on Raspberry Pi
 
Linux kernel
Linux kernelLinux kernel
Linux kernel
 
NFVアプリケーションをOpenStack上で動かす為に - OpenStack最新情報セミナー 2017年7月
NFVアプリケーションをOpenStack上で動かす為に - OpenStack最新情報セミナー 2017年7月NFVアプリケーションをOpenStack上で動かす為に - OpenStack最新情報セミナー 2017年7月
NFVアプリケーションをOpenStack上で動かす為に - OpenStack最新情報セミナー 2017年7月
 
DMA Survival Guide
DMA Survival GuideDMA Survival Guide
DMA Survival Guide
 

Similar to Brief introduction to kselftest

Linux Distribution Automated Testing
 Linux Distribution Automated Testing Linux Distribution Automated Testing
Linux Distribution Automated TestingAleksander Baranowski
 
Linux Kernel Selftest Framework - Quality Control for New Releases
Linux Kernel Selftest Framework - Quality Control for New ReleasesLinux Kernel Selftest Framework - Quality Control for New Releases
Linux Kernel Selftest Framework - Quality Control for New ReleasesSamsung Open Source Group
 
OpenNebulaConf 2014 - CentOS, QA and OpenNebula - Christoph Galuschka
OpenNebulaConf 2014 - CentOS, QA and OpenNebula - Christoph GaluschkaOpenNebulaConf 2014 - CentOS, QA and OpenNebula - Christoph Galuschka
OpenNebulaConf 2014 - CentOS, QA and OpenNebula - Christoph GaluschkaOpenNebula Project
 
OpenNebula Conf 2014: CentOS, QA an OpenNebula - Christoph Galuschka
OpenNebula Conf 2014: CentOS, QA an OpenNebula - Christoph GaluschkaOpenNebula Conf 2014: CentOS, QA an OpenNebula - Christoph Galuschka
OpenNebula Conf 2014: CentOS, QA an OpenNebula - Christoph GaluschkaNETWAYS
 
How to master OpenStack in 2 hours
How to master OpenStack in 2 hoursHow to master OpenStack in 2 hours
How to master OpenStack in 2 hoursOpenCity Community
 
The Future of Security and Productivity in Our Newly Remote World
The Future of Security and Productivity in Our Newly Remote WorldThe Future of Security and Productivity in Our Newly Remote World
The Future of Security and Productivity in Our Newly Remote WorldDevOps.com
 
Parallelizing CI using Docker Swarm-Mode
Parallelizing CI using Docker Swarm-ModeParallelizing CI using Docker Swarm-Mode
Parallelizing CI using Docker Swarm-ModeAkihiro Suda
 
Nrpe - Nagios Remote Plugin Executor. NRPE plugin for Nagios Core
Nrpe - Nagios Remote Plugin Executor. NRPE plugin for Nagios CoreNrpe - Nagios Remote Plugin Executor. NRPE plugin for Nagios Core
Nrpe - Nagios Remote Plugin Executor. NRPE plugin for Nagios CoreNagios
 
NRPE - Nagios Remote Plugin Executor. NRPE plugin for Nagios Core 4 and others.
NRPE - Nagios Remote Plugin Executor. NRPE plugin for Nagios Core 4 and others.NRPE - Nagios Remote Plugin Executor. NRPE plugin for Nagios Core 4 and others.
NRPE - Nagios Remote Plugin Executor. NRPE plugin for Nagios Core 4 and others.Marc Trimble
 
1 session installation
1 session installation1 session installation
1 session installationRahul Hada
 
Wrangling 3rd Party Installers from Puppet
Wrangling 3rd Party Installers from PuppetWrangling 3rd Party Installers from Puppet
Wrangling 3rd Party Installers from PuppetPuppet
 
Improving WordPress Theme Development Workflow - Naveen Kharwar.
Improving WordPress Theme Development Workflow - Naveen Kharwar.Improving WordPress Theme Development Workflow - Naveen Kharwar.
Improving WordPress Theme Development Workflow - Naveen Kharwar.Naveen Kharwar
 
图文详解安装Net backup 6.5备份恢复oracle 10g rac 数据库
图文详解安装Net backup 6.5备份恢复oracle 10g rac 数据库图文详解安装Net backup 6.5备份恢复oracle 10g rac 数据库
图文详解安装Net backup 6.5备份恢复oracle 10g rac 数据库maclean liu
 
Containers with systemd-nspawn
Containers with systemd-nspawnContainers with systemd-nspawn
Containers with systemd-nspawnGábor Nyers
 
Shorten Device Boot Time for Automotive IVI and Navigation Systems
Shorten Device Boot Time for Automotive IVI and Navigation SystemsShorten Device Boot Time for Automotive IVI and Navigation Systems
Shorten Device Boot Time for Automotive IVI and Navigation SystemsNational Cheng Kung University
 
apidays LIVE New York - Navigating the Sea of Javascript Tools to Discover Sc...
apidays LIVE New York - Navigating the Sea of Javascript Tools to Discover Sc...apidays LIVE New York - Navigating the Sea of Javascript Tools to Discover Sc...
apidays LIVE New York - Navigating the Sea of Javascript Tools to Discover Sc...apidays
 
Intro to Kernel Debugging - Just make the crashing stop!
Intro to Kernel Debugging - Just make the crashing stop!Intro to Kernel Debugging - Just make the crashing stop!
Intro to Kernel Debugging - Just make the crashing stop!All Things Open
 
Getting Started with OpenStack Development
Getting Started with OpenStack Development Getting Started with OpenStack Development
Getting Started with OpenStack Development Rackspace
 
Systemd: the modern Linux init system you will learn to love
Systemd: the modern Linux init system you will learn to loveSystemd: the modern Linux init system you will learn to love
Systemd: the modern Linux init system you will learn to loveAlison Chaiken
 
Navigating container technology for enhanced security by Niklas Saari
Navigating container technology for enhanced security by Niklas SaariNavigating container technology for enhanced security by Niklas Saari
Navigating container technology for enhanced security by Niklas SaariMetosin Oy
 

Similar to Brief introduction to kselftest (20)

Linux Distribution Automated Testing
 Linux Distribution Automated Testing Linux Distribution Automated Testing
Linux Distribution Automated Testing
 
Linux Kernel Selftest Framework - Quality Control for New Releases
Linux Kernel Selftest Framework - Quality Control for New ReleasesLinux Kernel Selftest Framework - Quality Control for New Releases
Linux Kernel Selftest Framework - Quality Control for New Releases
 
OpenNebulaConf 2014 - CentOS, QA and OpenNebula - Christoph Galuschka
OpenNebulaConf 2014 - CentOS, QA and OpenNebula - Christoph GaluschkaOpenNebulaConf 2014 - CentOS, QA and OpenNebula - Christoph Galuschka
OpenNebulaConf 2014 - CentOS, QA and OpenNebula - Christoph Galuschka
 
OpenNebula Conf 2014: CentOS, QA an OpenNebula - Christoph Galuschka
OpenNebula Conf 2014: CentOS, QA an OpenNebula - Christoph GaluschkaOpenNebula Conf 2014: CentOS, QA an OpenNebula - Christoph Galuschka
OpenNebula Conf 2014: CentOS, QA an OpenNebula - Christoph Galuschka
 
How to master OpenStack in 2 hours
How to master OpenStack in 2 hoursHow to master OpenStack in 2 hours
How to master OpenStack in 2 hours
 
The Future of Security and Productivity in Our Newly Remote World
The Future of Security and Productivity in Our Newly Remote WorldThe Future of Security and Productivity in Our Newly Remote World
The Future of Security and Productivity in Our Newly Remote World
 
Parallelizing CI using Docker Swarm-Mode
Parallelizing CI using Docker Swarm-ModeParallelizing CI using Docker Swarm-Mode
Parallelizing CI using Docker Swarm-Mode
 
Nrpe - Nagios Remote Plugin Executor. NRPE plugin for Nagios Core
Nrpe - Nagios Remote Plugin Executor. NRPE plugin for Nagios CoreNrpe - Nagios Remote Plugin Executor. NRPE plugin for Nagios Core
Nrpe - Nagios Remote Plugin Executor. NRPE plugin for Nagios Core
 
NRPE - Nagios Remote Plugin Executor. NRPE plugin for Nagios Core 4 and others.
NRPE - Nagios Remote Plugin Executor. NRPE plugin for Nagios Core 4 and others.NRPE - Nagios Remote Plugin Executor. NRPE plugin for Nagios Core 4 and others.
NRPE - Nagios Remote Plugin Executor. NRPE plugin for Nagios Core 4 and others.
 
1 session installation
1 session installation1 session installation
1 session installation
 
Wrangling 3rd Party Installers from Puppet
Wrangling 3rd Party Installers from PuppetWrangling 3rd Party Installers from Puppet
Wrangling 3rd Party Installers from Puppet
 
Improving WordPress Theme Development Workflow - Naveen Kharwar.
Improving WordPress Theme Development Workflow - Naveen Kharwar.Improving WordPress Theme Development Workflow - Naveen Kharwar.
Improving WordPress Theme Development Workflow - Naveen Kharwar.
 
图文详解安装Net backup 6.5备份恢复oracle 10g rac 数据库
图文详解安装Net backup 6.5备份恢复oracle 10g rac 数据库图文详解安装Net backup 6.5备份恢复oracle 10g rac 数据库
图文详解安装Net backup 6.5备份恢复oracle 10g rac 数据库
 
Containers with systemd-nspawn
Containers with systemd-nspawnContainers with systemd-nspawn
Containers with systemd-nspawn
 
Shorten Device Boot Time for Automotive IVI and Navigation Systems
Shorten Device Boot Time for Automotive IVI and Navigation SystemsShorten Device Boot Time for Automotive IVI and Navigation Systems
Shorten Device Boot Time for Automotive IVI and Navigation Systems
 
apidays LIVE New York - Navigating the Sea of Javascript Tools to Discover Sc...
apidays LIVE New York - Navigating the Sea of Javascript Tools to Discover Sc...apidays LIVE New York - Navigating the Sea of Javascript Tools to Discover Sc...
apidays LIVE New York - Navigating the Sea of Javascript Tools to Discover Sc...
 
Intro to Kernel Debugging - Just make the crashing stop!
Intro to Kernel Debugging - Just make the crashing stop!Intro to Kernel Debugging - Just make the crashing stop!
Intro to Kernel Debugging - Just make the crashing stop!
 
Getting Started with OpenStack Development
Getting Started with OpenStack Development Getting Started with OpenStack Development
Getting Started with OpenStack Development
 
Systemd: the modern Linux init system you will learn to love
Systemd: the modern Linux init system you will learn to loveSystemd: the modern Linux init system you will learn to love
Systemd: the modern Linux init system you will learn to love
 
Navigating container technology for enhanced security by Niklas Saari
Navigating container technology for enhanced security by Niklas SaariNavigating container technology for enhanced security by Niklas Saari
Navigating container technology for enhanced security by Niklas Saari
 

More from SeongJae Park

Biscuit: an operating system written in go
Biscuit:  an operating system written in goBiscuit:  an operating system written in go
Biscuit: an operating system written in goSeongJae Park
 
GCMA: Guaranteed Contiguous Memory Allocator
GCMA: Guaranteed Contiguous Memory AllocatorGCMA: Guaranteed Contiguous Memory Allocator
GCMA: Guaranteed Contiguous Memory AllocatorSeongJae Park
 
Linux Kernel Memory Model
Linux Kernel Memory ModelLinux Kernel Memory Model
Linux Kernel Memory ModelSeongJae Park
 
An Introduction to the Formalised Memory Model for Linux Kernel
An Introduction to the Formalised Memory Model for Linux KernelAn Introduction to the Formalised Memory Model for Linux Kernel
An Introduction to the Formalised Memory Model for Linux KernelSeongJae Park
 
Design choices of golang for high scalability
Design choices of golang for high scalabilityDesign choices of golang for high scalability
Design choices of golang for high scalabilitySeongJae Park
 
Understanding of linux kernel memory model
Understanding of linux kernel memory modelUnderstanding of linux kernel memory model
Understanding of linux kernel memory modelSeongJae Park
 
Let the contribution begin (EST futures)
Let the contribution begin  (EST futures)Let the contribution begin  (EST futures)
Let the contribution begin (EST futures)SeongJae Park
 
Porting golang development environment developed with golang
Porting golang development environment developed with golangPorting golang development environment developed with golang
Porting golang development environment developed with golangSeongJae Park
 
gcma: guaranteed contiguous memory allocator
gcma:  guaranteed contiguous memory allocatorgcma:  guaranteed contiguous memory allocator
gcma: guaranteed contiguous memory allocatorSeongJae Park
 
An introduction to_golang.avi
An introduction to_golang.aviAn introduction to_golang.avi
An introduction to_golang.aviSeongJae Park
 
Develop Android/iOS app using golang
Develop Android/iOS app using golangDevelop Android/iOS app using golang
Develop Android/iOS app using golangSeongJae Park
 
Develop Android app using Golang
Develop Android app using GolangDevelop Android app using Golang
Develop Android app using GolangSeongJae Park
 
Sw install with_without_docker
Sw install with_without_dockerSw install with_without_docker
Sw install with_without_dockerSeongJae Park
 
Git inter-snapshot public
Git  inter-snapshot publicGit  inter-snapshot public
Git inter-snapshot publicSeongJae Park
 
(Live) build and run golang web server on android.avi
(Live) build and run golang web server on android.avi(Live) build and run golang web server on android.avi
(Live) build and run golang web server on android.aviSeongJae Park
 
Deep dark-side of git: How git works internally
Deep dark-side of git: How git works internallyDeep dark-side of git: How git works internally
Deep dark-side of git: How git works internallySeongJae Park
 
Deep dark side of git - prologue
Deep dark side of git - prologueDeep dark side of git - prologue
Deep dark side of git - prologueSeongJae Park
 
DO YOU WANT TO USE A VCS
DO YOU WANT TO USE A VCSDO YOU WANT TO USE A VCS
DO YOU WANT TO USE A VCSSeongJae Park
 
Experimental android hacking using reflection
Experimental android hacking using reflectionExperimental android hacking using reflection
Experimental android hacking using reflectionSeongJae Park
 

More from SeongJae Park (20)

Biscuit: an operating system written in go
Biscuit:  an operating system written in goBiscuit:  an operating system written in go
Biscuit: an operating system written in go
 
GCMA: Guaranteed Contiguous Memory Allocator
GCMA: Guaranteed Contiguous Memory AllocatorGCMA: Guaranteed Contiguous Memory Allocator
GCMA: Guaranteed Contiguous Memory Allocator
 
Linux Kernel Memory Model
Linux Kernel Memory ModelLinux Kernel Memory Model
Linux Kernel Memory Model
 
An Introduction to the Formalised Memory Model for Linux Kernel
An Introduction to the Formalised Memory Model for Linux KernelAn Introduction to the Formalised Memory Model for Linux Kernel
An Introduction to the Formalised Memory Model for Linux Kernel
 
Design choices of golang for high scalability
Design choices of golang for high scalabilityDesign choices of golang for high scalability
Design choices of golang for high scalability
 
Understanding of linux kernel memory model
Understanding of linux kernel memory modelUnderstanding of linux kernel memory model
Understanding of linux kernel memory model
 
Let the contribution begin (EST futures)
Let the contribution begin  (EST futures)Let the contribution begin  (EST futures)
Let the contribution begin (EST futures)
 
Porting golang development environment developed with golang
Porting golang development environment developed with golangPorting golang development environment developed with golang
Porting golang development environment developed with golang
 
gcma: guaranteed contiguous memory allocator
gcma:  guaranteed contiguous memory allocatorgcma:  guaranteed contiguous memory allocator
gcma: guaranteed contiguous memory allocator
 
An introduction to_golang.avi
An introduction to_golang.aviAn introduction to_golang.avi
An introduction to_golang.avi
 
Develop Android/iOS app using golang
Develop Android/iOS app using golangDevelop Android/iOS app using golang
Develop Android/iOS app using golang
 
Develop Android app using Golang
Develop Android app using GolangDevelop Android app using Golang
Develop Android app using Golang
 
Sw install with_without_docker
Sw install with_without_dockerSw install with_without_docker
Sw install with_without_docker
 
Git inter-snapshot public
Git  inter-snapshot publicGit  inter-snapshot public
Git inter-snapshot public
 
(Live) build and run golang web server on android.avi
(Live) build and run golang web server on android.avi(Live) build and run golang web server on android.avi
(Live) build and run golang web server on android.avi
 
Deep dark-side of git: How git works internally
Deep dark-side of git: How git works internallyDeep dark-side of git: How git works internally
Deep dark-side of git: How git works internally
 
Deep dark side of git - prologue
Deep dark side of git - prologueDeep dark side of git - prologue
Deep dark side of git - prologue
 
DO YOU WANT TO USE A VCS
DO YOU WANT TO USE A VCSDO YOU WANT TO USE A VCS
DO YOU WANT TO USE A VCS
 
Experimental android hacking using reflection
Experimental android hacking using reflectionExperimental android hacking using reflection
Experimental android hacking using reflection
 
ash
ashash
ash
 

Recently uploaded

AUTOKEYUNLOCKER-BRANDS-SUPPORT-STANDARD-VERSION.pdf
AUTOKEYUNLOCKER-BRANDS-SUPPORT-STANDARD-VERSION.pdfAUTOKEYUNLOCKER-BRANDS-SUPPORT-STANDARD-VERSION.pdf
AUTOKEYUNLOCKER-BRANDS-SUPPORT-STANDARD-VERSION.pdfAutokey
 
The Age of AI: Elevating Experiences & Delivering Customer Value!
The Age of AI: Elevating Experiences & Delivering Customer Value!The Age of AI: Elevating Experiences & Delivering Customer Value!
The Age of AI: Elevating Experiences & Delivering Customer Value!ISPMAIndia
 
P1 Inspection Types in Municity 5 Smartsheet
P1 Inspection Types in Municity 5 SmartsheetP1 Inspection Types in Municity 5 Smartsheet
P1 Inspection Types in Municity 5 SmartsheetMatthewTHawley
 
Sql server types of joins with example.pptx
Sql server types of joins with example.pptxSql server types of joins with example.pptx
Sql server types of joins with example.pptxsameer gaikwad
 
AI Product Management by Abhijit Bendigiri
AI Product Management by Abhijit BendigiriAI Product Management by Abhijit Bendigiri
AI Product Management by Abhijit BendigiriISPMAIndia
 
Cormas: Modelling for Citizens with Citizens. Building accessible and reliabl...
Cormas: Modelling for Citizens with Citizens. Building accessible and reliabl...Cormas: Modelling for Citizens with Citizens. Building accessible and reliabl...
Cormas: Modelling for Citizens with Citizens. Building accessible and reliabl...Oleksandr Zaitsev
 
Steps to Build a PWA with Odoo.pdf
Steps to Build a PWA with Odoo.pdfSteps to Build a PWA with Odoo.pdf
Steps to Build a PWA with Odoo.pdfayushinwizards
 
Product Manager vs Product Owner – Why Do Companies Still Struggle 23 Years A...
Product Manager vs Product Owner – Why Do Companies Still Struggle 23 Years A...Product Manager vs Product Owner – Why Do Companies Still Struggle 23 Years A...
Product Manager vs Product Owner – Why Do Companies Still Struggle 23 Years A...ISPMAIndia
 
Self scaling Multi cloud nomad workloads
Self scaling Multi cloud nomad workloadsSelf scaling Multi cloud nomad workloads
Self scaling Multi cloud nomad workloadsBram Vogelaar
 
DBA Fundamentals Group: Continuous SQL with Kafka and Flink
DBA Fundamentals Group: Continuous SQL with Kafka and FlinkDBA Fundamentals Group: Continuous SQL with Kafka and Flink
DBA Fundamentals Group: Continuous SQL with Kafka and FlinkTimothy Spann
 
Manual de la Mezcladora SoundCraft Notepad -12Fx
Manual de la Mezcladora SoundCraft Notepad -12FxManual de la Mezcladora SoundCraft Notepad -12Fx
Manual de la Mezcladora SoundCraft Notepad -12Fxjavierdavidvelasco17
 
killingcamp 광고삽입문제 풀이, killingcamp 광고삽입문제 풀이
killingcamp 광고삽입문제 풀이, killingcamp 광고삽입문제 풀이killingcamp 광고삽입문제 풀이, killingcamp 광고삽입문제 풀이
killingcamp 광고삽입문제 풀이, killingcamp 광고삽입문제 풀이ssuser82c38d
 
"Discovery and Delivery through Product IntelliGenAI framework" by Ramkumar A...
"Discovery and Delivery through Product IntelliGenAI framework" by Ramkumar A..."Discovery and Delivery through Product IntelliGenAI framework" by Ramkumar A...
"Discovery and Delivery through Product IntelliGenAI framework" by Ramkumar A...ISPMAIndia
 
Essence of Requirements Engineering: Pragmatic Insights for 2024
Essence of Requirements Engineering: Pragmatic Insights for 2024Essence of Requirements Engineering: Pragmatic Insights for 2024
Essence of Requirements Engineering: Pragmatic Insights for 2024Asher Sterkin
 
Industry 4.0: Building the Unified Namespace with Confluent, HiveMQ and Spark...
Industry 4.0: Building the Unified Namespace with Confluent, HiveMQ and Spark...Industry 4.0: Building the Unified Namespace with Confluent, HiveMQ and Spark...
Industry 4.0: Building the Unified Namespace with Confluent, HiveMQ and Spark...confluent
 
100 TOOLS TO MEASURE AND ANALYSE YOUR DIGITAL MARKETING EFFORTS
100 TOOLS TO MEASURE AND ANALYSE YOUR DIGITAL MARKETING EFFORTS100 TOOLS TO MEASURE AND ANALYSE YOUR DIGITAL MARKETING EFFORTS
100 TOOLS TO MEASURE AND ANALYSE YOUR DIGITAL MARKETING EFFORTSi-engage
 
Embracing Change - The Impact of Generative AI on Strategic Portfolio Management
Embracing Change - The Impact of Generative AI on Strategic Portfolio ManagementEmbracing Change - The Impact of Generative AI on Strategic Portfolio Management
Embracing Change - The Impact of Generative AI on Strategic Portfolio ManagementOnePlan Solutions
 
maximum subarray ppt for killing camp students
maximum subarray ppt for killing camp studentsmaximum subarray ppt for killing camp students
maximum subarray ppt for killing camp studentsssuser82c38d
 
SPM 2024 – Overview of and benefits of AI in Product Management
SPM 2024 – Overview of and benefits of AI in Product ManagementSPM 2024 – Overview of and benefits of AI in Product Management
SPM 2024 – Overview of and benefits of AI in Product ManagementISPMAIndia
 

Recently uploaded (20)

AUTOKEYUNLOCKER-BRANDS-SUPPORT-STANDARD-VERSION.pdf
AUTOKEYUNLOCKER-BRANDS-SUPPORT-STANDARD-VERSION.pdfAUTOKEYUNLOCKER-BRANDS-SUPPORT-STANDARD-VERSION.pdf
AUTOKEYUNLOCKER-BRANDS-SUPPORT-STANDARD-VERSION.pdf
 
The Age of AI: Elevating Experiences & Delivering Customer Value!
The Age of AI: Elevating Experiences & Delivering Customer Value!The Age of AI: Elevating Experiences & Delivering Customer Value!
The Age of AI: Elevating Experiences & Delivering Customer Value!
 
Features of IETM Software -Code and Pixels
Features of IETM Software -Code and PixelsFeatures of IETM Software -Code and Pixels
Features of IETM Software -Code and Pixels
 
P1 Inspection Types in Municity 5 Smartsheet
P1 Inspection Types in Municity 5 SmartsheetP1 Inspection Types in Municity 5 Smartsheet
P1 Inspection Types in Municity 5 Smartsheet
 
Sql server types of joins with example.pptx
Sql server types of joins with example.pptxSql server types of joins with example.pptx
Sql server types of joins with example.pptx
 
AI Product Management by Abhijit Bendigiri
AI Product Management by Abhijit BendigiriAI Product Management by Abhijit Bendigiri
AI Product Management by Abhijit Bendigiri
 
Cormas: Modelling for Citizens with Citizens. Building accessible and reliabl...
Cormas: Modelling for Citizens with Citizens. Building accessible and reliabl...Cormas: Modelling for Citizens with Citizens. Building accessible and reliabl...
Cormas: Modelling for Citizens with Citizens. Building accessible and reliabl...
 
Steps to Build a PWA with Odoo.pdf
Steps to Build a PWA with Odoo.pdfSteps to Build a PWA with Odoo.pdf
Steps to Build a PWA with Odoo.pdf
 
Product Manager vs Product Owner – Why Do Companies Still Struggle 23 Years A...
Product Manager vs Product Owner – Why Do Companies Still Struggle 23 Years A...Product Manager vs Product Owner – Why Do Companies Still Struggle 23 Years A...
Product Manager vs Product Owner – Why Do Companies Still Struggle 23 Years A...
 
Self scaling Multi cloud nomad workloads
Self scaling Multi cloud nomad workloadsSelf scaling Multi cloud nomad workloads
Self scaling Multi cloud nomad workloads
 
DBA Fundamentals Group: Continuous SQL with Kafka and Flink
DBA Fundamentals Group: Continuous SQL with Kafka and FlinkDBA Fundamentals Group: Continuous SQL with Kafka and Flink
DBA Fundamentals Group: Continuous SQL with Kafka and Flink
 
Manual de la Mezcladora SoundCraft Notepad -12Fx
Manual de la Mezcladora SoundCraft Notepad -12FxManual de la Mezcladora SoundCraft Notepad -12Fx
Manual de la Mezcladora SoundCraft Notepad -12Fx
 
killingcamp 광고삽입문제 풀이, killingcamp 광고삽입문제 풀이
killingcamp 광고삽입문제 풀이, killingcamp 광고삽입문제 풀이killingcamp 광고삽입문제 풀이, killingcamp 광고삽입문제 풀이
killingcamp 광고삽입문제 풀이, killingcamp 광고삽입문제 풀이
 
"Discovery and Delivery through Product IntelliGenAI framework" by Ramkumar A...
"Discovery and Delivery through Product IntelliGenAI framework" by Ramkumar A..."Discovery and Delivery through Product IntelliGenAI framework" by Ramkumar A...
"Discovery and Delivery through Product IntelliGenAI framework" by Ramkumar A...
 
Essence of Requirements Engineering: Pragmatic Insights for 2024
Essence of Requirements Engineering: Pragmatic Insights for 2024Essence of Requirements Engineering: Pragmatic Insights for 2024
Essence of Requirements Engineering: Pragmatic Insights for 2024
 
Industry 4.0: Building the Unified Namespace with Confluent, HiveMQ and Spark...
Industry 4.0: Building the Unified Namespace with Confluent, HiveMQ and Spark...Industry 4.0: Building the Unified Namespace with Confluent, HiveMQ and Spark...
Industry 4.0: Building the Unified Namespace with Confluent, HiveMQ and Spark...
 
100 TOOLS TO MEASURE AND ANALYSE YOUR DIGITAL MARKETING EFFORTS
100 TOOLS TO MEASURE AND ANALYSE YOUR DIGITAL MARKETING EFFORTS100 TOOLS TO MEASURE AND ANALYSE YOUR DIGITAL MARKETING EFFORTS
100 TOOLS TO MEASURE AND ANALYSE YOUR DIGITAL MARKETING EFFORTS
 
Embracing Change - The Impact of Generative AI on Strategic Portfolio Management
Embracing Change - The Impact of Generative AI on Strategic Portfolio ManagementEmbracing Change - The Impact of Generative AI on Strategic Portfolio Management
Embracing Change - The Impact of Generative AI on Strategic Portfolio Management
 
maximum subarray ppt for killing camp students
maximum subarray ppt for killing camp studentsmaximum subarray ppt for killing camp students
maximum subarray ppt for killing camp students
 
SPM 2024 – Overview of and benefits of AI in Product Management
SPM 2024 – Overview of and benefits of AI in Product ManagementSPM 2024 – Overview of and benefits of AI in Product Management
SPM 2024 – Overview of and benefits of AI in Product Management
 

Brief introduction to kselftest

  • 1. Brief Introduction to Kselftest SeongJae Park <sj38.park@gmail.com>
  • 2. This work by SeongJae Park is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/3.0/.
  • 3. These slides were presented during 2nd Korea Linux Kernel Community Meetup (http://onoffmix.com/event/99896)
  • 4. Nice To Meet You SeongJae Park sj38.park@gmail.com Part time programmer at KOSSLAB
  • 5. ● Linus Torvalds always want us to test the kernel, but, how? ``Go out and test’’, but, how? Date: Mon, 19 Jun 2017 23:04:15 +0800 From: Linus Torvalds <torvalds@linux-foundation.org> To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org> Subject: Linux 4.12-rc6 ... The good news is that rc6 is smaller than rc5 was, and I think we're ... Go out and test, Linus
  • 6. The Way to Test Kernel ● Simplest way: Build, boot, and use the kernel ○ It covers many important test cases, but limited and not funny (We do this just for fun, right?)
  • 7. The Ways to Test Linux Kernel Automatically ● Many automatic test suites, framework, and services for the kernel exists ○ Linux Test Project (https://linux-test-project.github.io/) ○ Zero-day service (https://01.org/lkp/documentation/0-day-test-service) ○ Kernel-ci.org (https://kernelci.org/) ○ mmtests (https://github.com/gormanm/mmtests) ○ More and more... ● However, fetching, configuring, running, and waiting them could be a little difficult to some developers ● Need more developer-friendly tests for more test https://cdn.meme.am/instances/500x/66745140/y-u-no-jenkins-y-u-no-hate-me.jpg
  • 8. Kselftest: Kernel Self Test ● Set of developer-friendly test framework and tests for the kernel ● Goal is to help developers do test more easily and more frequently ● May not cover entire case, but incomplete test is much better than just praying ● Discussed from 2014 kernel summit (https://lwn.net/Articles/608959/) ● Maintained by Shuah Kahn <shuahkh@osg.samsung.com> https://vignette4.wikia.nocookie.net/simpsons/images/8/88/Self-Test_Monthly.jpg/revision/latest?cb=20130611172738
  • 9. Kselftest is Contained in The Kernel Source Code ● You have the test if you have the kernel source code ○ Under tools/testing/selftests ● For newest selftest, use the git repository at https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git/ ● Select master, next, devel, or fixes branch for your purpose ● next: Content for upcoming merge window ● fixes: Fixes to current -rc release are contained ● devel: Experimental patches are contained http://nothingbutpenguins.com/wp-content/uploads/2010/09/test-tube-penguin.jpg
  • 10. Kselftest Runs Quickly ● Many tests require long running time ○ Mel Gorman’s test takes thirteen days ○ Paul McKenney’s rcutorture takes six hours (https://lwn.net/Articles/608959/) ● Long running tests will not be accepted as default test ● Current goal is under 20 minutes ● Kselftest default run takes about 9 minutes on my PC https://lc-www-live-s.legocdn.com/r/www/r/catalogs/-/media/catalogs/characters/dc/mug shots/76012_flash_1488x1984_mugshot_360w_2x.png?l.r2=-1920023313
  • 11. Build and Run ● First, boot with the kernel ● Build ○ # make -C tools/testing/selftests ● Run ○ # make -C tools/testing/selftests run_tests ○ The command does build if build has not done yet ● Simplest way to build and run: ○ # make kselftest ● Some tests require root privilege, but running them without the privilege should not make serious problem
  • 12. Running Subset of Tests Only ● If you have interest in specific tests only, you can build and run them only ○ # make TARGETS=<name of tests> kselftest http://www.futuresmag.com/sites/default/files/styles/300x225/public/futuresmag/article/2014/01/19/cherry%20 pick.jpg?itok=1UFRfqCJ
  • 13. Install Kselftest ● The tests can be installed in anywhere (e.g., other system that connected with nfs) you want ○ $ cd tools/testing/selftests; ./kselftest_install.sh [install location] ● To run the installed tests ○ # cd [install localtion/]kselftest; ./run_kselftest.sh
  • 14. Packaging kselftest ● The tests can be packaged as tarball ○ $ ./gen_kselftest_tar.sh [tar|targz|tarbz2|tarxz] ● The package can be installed and run at anywhere (e.g., tiny testing machine without gcc or make) ○ # tar xf ./kselftest.tar.gz; cd kselftest; ./run_kselftest.sh https://rcstalon.files.wordpress.com/2013/10/cat-in-a-cat-box.jpg
  • 15. Adding Your New Test ● Insert your test code and Makefile for the test under selftests/<test name>/ ● The Makefile should include selftests/lib.mk and define your test program(s) as TEST_PROGS ● Add your <test name> to TARGETS in selftests/Makefile selftests/sjpark$ cat Makefile CFLAGS = -Wall -O2 -g TEST_PROGS := sjtest TEST_GEN_FILES = sjtest include ../lib.mk selftests/sjpark$ cat sjtest.c #include <stdio.h> int main(void) { printf("hello worldn"); return 0; }
  • 16. Kselftest can be a Start Point to the Kernel ● In many case, test code is a good document to the program ○ If you can judge a behavior of an instance as success or fail, you are understanding the function ● If you are new to the kernel, kselftest can be a good start point https://www.icas.com/__data/assets/image/0010/4015/varieties/wide-715px.jpg
  • 17. Conclusion ● Kselftest is a developer-friendly test framework and tests for the Linux kernel ● The test is contained in the kernel source code itself ● The test runs quickly under 20 minutes ● The test can be packaged, installed, and run easily ● The test code can be a good start point to the Linux kernel