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 -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
