[opensuse] CPU frequency
- From: Roger Oberholtzer <roger@xxxxxx>
- Date: Tue, 01 Feb 2011 16:43:40 +0100
On openSUSE 11.2 on a desktop computer (not a laptop), I ran
cpufreq-info to see what speed my processor was running at. The system
was doing things, so I would imagine it would be set to a higher
frequency. But that seems not to be the case.
cpufreq-info lists (same for all CPUs):
analyzing CPU 0:
CPUs which need to switch frequency at the same time: 0
hardware limits: 1.60 GHz - 2.40 GHz
available frequency steps: 2.40 GHz, 1.60 GHz
available cpufreq governors: conservative, userspace, powersave, ondemand, performance
current policy: frequency should be within 1.60 GHz and 2.40 GHz.
The governor "userspace" may decide which speed to use
within this range.
current CPU frequency is 1.60 GHz (asserted by call to hardware).
So I tried setting it to 2.4 GHz to see if that happened:
# cpufreq-info -w
# cpufreq-set -f 2.4GHz
# cpufreq-info -w
My question is: how/where should I set it so the CPU frequency is
increased when there is system load? I am guessing it is the 'ondemand'
governor that should be selected. But where? I did not see any likely
place in /etc/sysconfig or in an /etc/init.d script.
had some to say, but did not really satisfy my curiosity. I am guessing
that the default is set to 'powersave'. Does that sound correct?
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