Launching g-p-m in gdm, Was: too many deamons by default - F7 test 2 live cd
Dave Jones
davej at redhat.com
Wed Mar 21 17:02:54 UTC 2007
On Wed, Mar 21, 2007 at 12:08:49PM +0100, Thorsten Leemhuis wrote:
>
> On 21.03.2007 11:35, Richard Hughes wrote:
> > On Wed, 2007-03-21 at 11:22 +0100, Thorsten Leemhuis wrote:
> >> P.S.: I'd further say the cpufreq stuff should be enabled early in the
> >> boot-process -- gdm seems quite late for me.
> >
> > At startup we are not idle, or at least shouldn't be, and we gain little
> > from switching to a different governor at startup in my opinion.
>
> Sure, but we need to set one afaics because...
>
> > Whilst we are in the initscripts we *should* be at 100% utilization on
> > as many CPUs as we have for speed, so power saving doesn't really apply.
>
> ...we are I/O bound often during startup afaics (at least these days)
> and the CPU is often fast enough when on lower frequency.
We still do enough CPU bound stuff that will make this noticable.
It'll add a few seconds onto the boot time.
> Currently the default kernel gov is userspace:
>
> $ grep DEFAULT_GOV /boot/config-2.6.20-1.2997.fc7
> # CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
> CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y
>
> So no power savings until something takes care of it afaics (or am I
> wrong with that? anyway, that could probably easily be adjusted until F8).
if the userspace power management stuff starts really early in the
initscripts, there's no problem here.
Dave
--
http://www.codemonkey.org.uk
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