qinshulei

Running Ubuntu 16.04.1 armhf on Qemu

This is a writeup about how to install Ubuntu 16.04.1 Xenial Xerus for the 32-bit hard-float ARMv7 (armhf) architecture on a Qemu VM via Ubuntu netboot.

The setup will create a Ubuntu VM with LPAE extensions (generic-lpae) enabled. However, this writeup should also work for non-LPAE (generic) kernels.

The performance of the resulting VM is quite good, and it allows VMs with >1G ram (compared to 256M on versatilepb and 1G on versatile-a9/versatile-a15). It also supports virtio disks whereas versatile-a9/versatile-a15 only support SD cards via the -sd argument.

Get netboot files

qinshulei

I was tired of Chrome eating all my laptop resources so I decided to put some limit to it with cgroup.

As I was using Ubuntu 12.04 with support for cgroup, I installed the package cgroup-bin and add the following group to the file /etc/cgconfig.conf:

group browsers {
    cpu {
#       Set the relative share of CPU resources equal to 25%
        cpu.shares = "256";
 }

qinshulei

stage "preparation"

node {
   parallel (
     phase1: { sh "echo p1; echo phase1" },
     phase2: { sh "echo p2; echo phase2" }
   )
  sh "echo 42 > data"
  stash includes: '*', name: 'binary'
   

qinshulei

(require 'request) ;; https://github.com/tkf/emacs-request
(require 'json)

(defvar ginger-end-point
  "http://services.gingersoftware.com/Ginger/correct/json/GingerTheText"  )

;;;###autoload
(defun ginger-region (beg end)
  (interactive "r")
  (lexical-let* ((text (buffer-substring-no-properties beg end))

qinshulei

# GIT
# Download this file https://raw.githubusercontent.com/git/git/master/contrib/completion/git-prompt.sh to ~/.git-prompt.sh
source ~/.git-prompt.sh
export PS1='\[\e[1;33m\]'$PS1'\[\e[1;32m\]$(__git_ps1 "(%s) ")\[\e[m\]'

# TMUX
export TERM=xterm-256color

qinshulei

#!/usr/bin/env python

"""Simple HTTP Server With Upload.

This module builds on BaseHTTPServer by implementing the standard GET
and HEAD requests in a fairly straightforward manner.

"""

qinshulei

alias gd="git diff"
alias gc="git clone"
alias ga="git add"
alias gbd="git branch -D"
alias gst="git status"
alias gca="git commit -a -m"
alias gpt="git push --tags"
alias gp="git push"
alias gpr="git pull-request"
alias grh="git reset --hard"

qinshulei

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.3//EN" "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">

<!--
    This configuration file was written by the eclipse-cs plugin configuration editor
-->
<!--
    Checkstyle-Configuration: Android Checks (Eclipse)
    Description: 
Slightly modified version of Sun Checks that better matches the default code formatter setting of Eclipse.

qinshulei

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qinshulei

function retry {
  local retry_max=$1
  shift

  local count=$retry_max
  while [ $count -gt 0 ]; do
    "$@" && break
    count=$(($count - 1))
    sleep 1
  done