Difference between revisions of "How to use cpufrequtils"
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... Never got it working ... | ... Never got it working ... | ||
| − | I've got -- you need to get userspace governor active: | + | I've got (ALT Linux w/2.6.14 on A30p) -- you need to get userspace governor active: |
# modprobe speedstep-ich cpufreq_userspace | # modprobe speedstep-ich cpufreq_userspace | ||
# echo userspace > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor | # echo userspace > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor | ||
Then cpufreq-set -f 500000 (or 700000) should do the job. | Then cpufreq-set -f 500000 (or 700000) should do the job. | ||
Revision as of 08:31, 3 February 2006
NOTE!
See the Dynamic Frequency Scaling HOWTO on how to avoid using cpu frequency scaling daemons by using the kernel builtin ondemand governor.
This package mainly has 2 programs:
- /usr/bin/cpufreq-info
- /usr/bin/cpufreq-set
cpufreq-info gives general device information:
xaiki@gonzo:~$ cpufreq-info
cpufrequtils 0.2: cpufreq-info (C) Dominik Brodowski 2004
Report errors and bugs to linux@brodo.de, please.
analyzing CPU 0:
driver: speedstep-smi
CPUs which need to switch frequency at the same time: 0
hardware limits: 500 MHz - 700 MHz
available frequency steps: 700 MHz, 500 MHz
available cpufreq governors: userspace, performance
current policy: frequency should be within 500 MHz and 700 MHz.
The governor "userspace" may decide which speed to use
within this range.
current CPU frequency is 700 MHz.
and cpufreq-set allows setting ... Never got it working ...
I've got (ALT Linux w/2.6.14 on A30p) -- you need to get userspace governor active:
- modprobe speedstep-ich cpufreq_userspace
- echo userspace > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
Then cpufreq-set -f 500000 (or 700000) should do the job.
