| « HOWTO: Expand a RAID 5 by adding another disk | HOWTO: Create a New VM with VirtualBox » |
HOWTO: Stop Folding at Home Scaling My CPU
29/11/09
01:50:41 pm, by richard 
, 186 words 
Categories: Ubuntu Linux, OS and Systems Administration, Installation and Configuration
HOWTO: Stop Folding at Home Scaling My CPU
If you use the CPU scaling options that are now a default part of Ubuntu, you will also see that when folding@home runs or any other process that hits the CPU's hard the CPU frequency will jump up a level or two. Folding@home run as a low priority using nice. To stop any nice process from pushing the CPU to its limits add the following code snippet into the existing file /etc/init.d/ondemand. If will replace the start and background switch commands. I also want to set the minimum for my frequency for CPU too.
start)
log_daemon_msg "Setup cpu scalling" "ondemand"
log_daemon_msg " Sleeping for 60 seconds before continuing"
log_daemon_msg " Setting ondemand, ignore nice and min freq 1.5Ghz"
start-stop-daemon --start --background --exec /etc/init.d/ondemand -- background
;;
background)
sleep 60 # probably enough time for desktop login
for CPUFREQ in /sys/devices/system/cpu/cpu*/cpufreq
do
[ -f ${CPUFREQ}/scaling_governor ] && echo -n ondemand > ${CPUFREQ}/scaling_govenor
[ -f ${CPUFREQ}/ondemand/ignore_nice_load ] && \
echo 1 > ${CPUFREQ}/ondemand/ignore_nice_load
[ -f ${CPUFREQ}/scaling_min_freq ] && echo 1500000 > ${CPUFREQ}/scaling_min_freq
done
;;
Now whenever you boot the file that tells the CPU scaling to ignore nice processes will be set.
Ubuntu documentation on Installing Folding At Home
Team Ubuntu Stats
No feedback yet
Comment feed for this post