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## C-states.md

      
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                silvernode
                / C-states.md
            
            
              Created
              February 11, 2019 06:14
                — forked from wmealing/C-states.md
            
              
                What are CPU "C-states" and how to disable them if needed?
              
          
    To limit a CPU to a certain C-state, you can pass the processor.max_cstate=X option in the kernel line of /boot/grub/grub.conf.
Here we limit the system to only C-State 1:
    kernel /vmlinuz-2.6.18-371.1.2.el5 ... processor.max_cstate=1

On some systems, the kernel can override the BIOS setting, and the parameter intel_idle.max_cstate=0 may be required to ensure sleep states are not entered:

  
## build_wire_rpm.sh

# Make a temporary dir to hold downloaded files
mkdir ~/tempwire
cd ~/tempwire
# Get Wire Version
WIRE_VER=$(curl -s -N "https://github.com/wireapp/wire-desktop/releases.atom" | grep -o -m1 ".*Linux.*" | grep -Po "[0-9.]{9}");
# Get latest files from Connor Anderson's Git repo
git clone "https://gitlab.com/ConorIA/wire-builds/repository/archive.tar.gz?ref=master" ~/tempwire
# Get and sort the sources
sed -i "s/<VERSION>/${WIRE_VER}/" wire-desktop.spec

	# Make a temporary dir to hold downloaded files
	mkdir ~/tempwire
	cd ~/tempwire
	# Get Wire Version
	WIRE_VER=$(curl -s -N "https://github.com/wireapp/wire-desktop/releases.atom" \| grep -o -m1 ".Linux." \| grep -Po "[0-9.]{9}");
	# Get latest files from Connor Anderson's Git repo
	git clone "https://gitlab.com/ConorIA/wire-builds/repository/archive.tar.gz?ref=master" ~/tempwire
	# Get and sort the sources
	sed -i "s/<VERSION>/${WIRE_VER}/" wire-desktop.spec