Re: cpufreq userspace governor does not reflect changes

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Hey,

On 11/18/06, Pallipadi, Venkatesh <[email protected]> wrote:

/sys/devices/....../cpuX/cpufreq/scaling_cur_freq
Gives you the information about last frequency that Linux tried to set
on this CPU

/sys/devices/....../cpuX/cpufreq/cpuinfo_cur_freq
(When supported) Gives you the information about actual frequency that
the CPU is running at.

Zero frequency value below is certainly a bug in the driver. What is the
kernel you are using?

Ooops! sorry missed that one. Its the 2.6.19-rc5-mm2. Its having the
same .config which i posted on the bugzilla. Do you want the acpidump
again?

On the particular CPU you have here, all cores in a package indeed share
the frequency. But, it does not really show up in affected_cpus as OS is
not coordinating the shared-ness of P-state across cores. That means, OS
programs each core individually based on CPU utilization and hardware
will pick the highest frequency among the two and run both cores at that
frequency.


Hold on, so let me get it right. When i do an echo 1596000 >
/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed, the cpu cores
will still be running at 1.86 Ghz since the other core is at that
frequency? In this situation how do I then change the frequency?

Thanks
Dhaval
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