CoreFreq for Clear Linux

Clear Linux Installation

Clear Linux Project

• Download the Clear Linux OS Server ISO image

Prepare

• VM [ Clear Linux ]
• HOST [ Arch Linux ]
• Hard disk of 40 GB minimum space size for the Clear Linux Kernel bundle
  • Base is requiring 2.5 GB and Kernel bundle 29 GB

qemu-img create clearlinux.img 40G
qemu-system-x86_64 -cpu EPYC-v3 -smp 4 -m 4096 -cdrom clear-36010-live-server.iso clearlinux.img

Boot

• Run the Clear Linux installer ( 7' )
  • Stay with the default us keyboard map during the whole installation
  • You must create one User as Administrator > root account will be deactivated

clr-installer

Development prerequisites

• Once installed and rebooted, log with the User account and set the keyboard map
  • Remember keyboard is still us
  • Wait until the end of the post-installation processes

sudo loadkeys fr

• Set up kernel development environment ( 13' )

sudo swupd bundle-add git
git --version
curl --version
sudo swupd bundle-add kernel-native-dkms

• Reboot with the installed Kernel and the KVM hardware acceleration enabled

 qemu-system-x86_64 -cpu EPYC-v3 -smp 4 -m 4096 --enable-kvm clearlinux.img

• Build, install, and load an out-of-tree module

## as root
mkdir -p /etc/kernel/cmdline.d
$EDITOR /etc/kernel/cmdline.d/allow-unsigned-modules.conf

---

module.sig_unenforce

---

## as root
clr-boot-manager update
reboot

CoreFreq installation

Download and Build

git clone https://github.com/cyring/CoreFreq.git
cd CoreFreq
make clean all

Run

Driver and Daemon

• Start the Driver

sudo insmod corefreqk.ko

• Start the Daemon

# option '-q' for quiet mode
sudo ./corefreqd -q &

Client

• Start the Client

./corefreq-cli

Exit

Client

• Press [Ctrl] + [x] to exit from the Client

Daemon

• Get the Daemon job pid

jobs -p

435

• Kill the Daemon

sudo kill 435

[1]+ Done sudo ./corefreqd -q

Driver

• Unload the Driver

sudo rmmod corefreqk