* [BUG] P4 HT cpufreq driver doesn't share governor/frequency between siblings
@ 2004-03-15 22:33 rutger
2004-03-15 22:41 ` Dave Jones
0 siblings, 1 reply; 2+ messages in thread
From: rutger @ 2004-03-15 22:33 UTC (permalink / raw)
To: linux-kernel
Small bugreport, Pentium 4 Hyper-Threaded with SMP kernel (2.6.4-bk
from Mar 11) and p4-clockmod module loaded, gives:
# cd /sys/devices/system/cpu
# cat cpu*/cpufreq/scaling_governor
performance
performance
# echo powersave > cpu1/cpufreq/scaling_governor
# cat cpu*/cpufreq/scaling_governor
performance
powersave
Shouldn't the cpufreq driver be shared between the siblings?
--
Rutger Nijlunsing ---------------------------- rutger ed tux tmfweb nl
never attribute to a conspiracy which can be explained by incompetence
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [BUG] P4 HT cpufreq driver doesn't share governor/frequency between siblings
2004-03-15 22:33 [BUG] P4 HT cpufreq driver doesn't share governor/frequency between siblings rutger
@ 2004-03-15 22:41 ` Dave Jones
0 siblings, 0 replies; 2+ messages in thread
From: Dave Jones @ 2004-03-15 22:41 UTC (permalink / raw)
To: linux-kernel; +Cc: linux-kernel
On Mon, Mar 15, 2004 at 11:33:58PM +0100, rutger@mail.com wrote:
> Small bugreport, Pentium 4 Hyper-Threaded with SMP kernel (2.6.4-bk
> from Mar 11) and p4-clockmod module loaded, gives:
>
> # cd /sys/devices/system/cpu
> # cat cpu*/cpufreq/scaling_governor
> performance
> performance
> # echo powersave > cpu1/cpufreq/scaling_governor
> # cat cpu*/cpufreq/scaling_governor
> performance
> powersave
>
> Shouldn't the cpufreq driver be shared between the siblings?
Theoretically, as split-cores become more advanced, we will be able
to save power on unused cores. With the current P4's I'll bet it
makes little to no difference at all.
Dave
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2004-03-15 22:33 [BUG] P4 HT cpufreq driver doesn't share governor/frequency between siblings rutger
2004-03-15 22:41 ` Dave Jones
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