Re: [gentoo-user] Questions about cpu frequency utils scripting
On Tue, Apr 21, 2015 at 1:02 PM, Mike Gilbert wrote: > On Mon, Apr 20, 2015 at 9:05 PM, Walter Dnes wrote: >> It seems like many of the cpu speed/governor switcher utilities in >> /usr/portage/sys-power don't work due to being too old. > > sys-power/cpupower is probably the best option in the portage tree. > It's sources are maintained in the kernel source tree. > I'm still running cpufreqd which I keep in my overlay, but upstream is long dead and I wouldn't necessarily recommend it as a first choice. One of these days I plan to migrate to thermald, though for the most part I've been of a not-broken-don't-fix mindset. -- Rich
Re: [gentoo-user] Questions about cpu frequency utils scripting
On Mon, Apr 20, 2015 at 9:05 PM, Walter Dnes wrote: > It seems like many of the cpu speed/governor switcher utilities in > /usr/portage/sys-power don't work due to being too old. sys-power/cpupower is probably the best option in the portage tree. It's sources are maintained in the kernel source tree.
Re: [gentoo-user] Questions about cpu frequency utils scripting
On 04/21/15 11:24, Walter Dnes wrote: > On Tue, Apr 21, 2015 at 06:42:35AM -0400, Alec Ten Harmsel wrote >> for core in `ls /sys/devices/system/cpu/ | egrep "cpu[0-9]+"` >> >> This works great on my desktop with 12 cores. > Can you please check whether Emanuele's solution works on your system? > > for core in /sys/devices/system/cpu/cpu[0-9]*/ > > I prefer simpler solutions. > That does work. I tested it this morning and it didn't work, but forgot that I'm using zsh. Works fine with bash. Alec
Re: [gentoo-user] Questions about cpu frequency utils scripting
On Tue, Apr 21, 2015 at 06:42:35AM -0400, Alec Ten Harmsel wrote > > for core in `ls /sys/devices/system/cpu/ | egrep "cpu[0-9]+"` > > This works great on my desktop with 12 cores. Can you please check whether Emanuele's solution works on your system? for core in /sys/devices/system/cpu/cpu[0-9]*/ I prefer simpler solutions. -- Walter Dnes I don't run "desktop environments"; I run useful applications
Re: [gentoo-user] Questions about cpu frequency utils scripting
On 04/20/2015 09:05 PM, Walter Dnes wrote:
>
> Another item I'm missing is wildcarding directories in bash. The
> selected values are applied to the CPUs in a loop that goes like so...
>
> for core in /sys/devices/system/cpu/cpu[0-9]/
> do
>echo "${governor[${choiceminus}]}" > ${core}cpufreq/scaling_governor
>echo -n "CPU ${core:27:1} set to "
>cat ${core}cpufreq/scaling_governor
> done
for core in `ls /sys/devices/system/cpu/ | egrep "cpu[0-9]+"`
This works great on my desktop with 12 cores.
Alec
Re: [gentoo-user] Questions about cpu frequency utils scripting
for core in /sys/devices/system/cpu/cpu[0-9]*/ -- Emanuele Rusconi
[gentoo-user] Questions about cpu frequency utils scripting
It seems like many of the cpu speed/governor switcher utilities in
/usr/portage/sys-power don't work due to being too old. I cobbled
together a simple bash script (YES!) that sort of emulates the eselect
interface, and allows me to switch between
userspace/powersave/performance/ondemend/conservative governors. Root
permission is required, of course, to write to the /sys pseudo
filesystem. I want to add some basic error-checking and documentation
in the comments before releasing it in the wild.
The only thing I can't get working is setting specific speeds. I do
set the governor to "userspace" first. I can't think of any other
problem. Given that I can switch between performance and powersave and
ondemand/conservative, I'm not too worried about this, but I'd like to
know for completeness.
Another item I'm missing is wildcarding directories in bash. The
selected values are applied to the CPUs in a loop that goes like so...
for core in /sys/devices/system/cpu/cpu[0-9]/
do
echo "${governor[${choiceminus}]}" > ${core}cpufreq/scaling_governor
echo -n "CPU ${core:27:1} set to "
cat ${core}cpufreq/scaling_governor
done
That works fine for notebooks with say 8 cores. But what happens when
you hit 16 cores? I can't come up with one bash wildcard expression
that handles "/sys/devices/system/cpu/cpu[0-9]/" and
"/sys/devices/system/cpu/cpu[0-9][0-9]/" simultaneously. There's
probably an elegant solution right under my nose, but my Google-fu is
failing me right now. In a worst-case-scenario, I could have one loop
for "/sys/devices/system/cpu/cpu[0-9]/". Then test for the existance of
"/sys/devices/system/cpu/cpu10]/". If it exists, run a separate loop
for "/sys/devices/system/cpu/cpu[0-9][0-9]/". Ugly, but it would work.
--
Walter Dnes
I don't run "desktop environments"; I run useful applications
