ubuntu tickless memo

sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade
sudo apt-get install htop
sudo apt-get install build-essential
sudo apt-get install libncurses-dev
sudo apt-get install libssl-dev
sudo apt-get install bc
sudo apt-get install linux-source
sudo -s
apt-get install linux-source-X.X.X
cd /usr/src
tar xvjf linux-source-X.X.X.tar.bz2
cd linux-source-X.X.X
cp /boot/config-X.X.X-XX-generic .config
make oldconfig
make menuconfig
 General setup  --->
    Timers subsystem  --->
      [*] Full dynticks system on all CPUs by default (except CPU 0)
    Local version - append to kernel release
      "name new signature"
    CONFIG_RCU_FAST_NO_HZ=y
    CONFIG_CPU_FREQ=n
make -j 4
make modules_install
make install
sudo vi /etc/default/grub
 - GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=1,2,3 nohz_full=1,2,3"
sudo update-grub
sudo reboot
dmesg | grep NO_HZ
 - [    0.000000] NO_HZ: Full dynticks CPUs: 1-3
 
 ToDo
 - check "Documentation/timers/NO_HZ" https://lwn.net/Articles/549593/
 - check "full tickless operation" https://lwn.net/Articles/549580/
 - kernel config
  - CONFIG_RCU_FAST_NO_HZ=y
 -  grub
  - rcu_nocbs=1,2,3