[mythtv-users] Power bill vs SchedulesDirect bill

Kevin Hulse jedi at mishnet.org
Wed Sep 19 22:42:01 UTC 2007

On Wed, Sep 19, 2007 at 12:52:15PM -0700, David Rees wrote:
> On 9/19/07, jedi at mishnet.org <jedi at mishnet.org> wrote:
> > > Look into "laptop-mode" or "noflushd", mount your filesystems "noatime",
> > > and "nodiratime".  I.e. go read everything you can about saving power on
> > > laptops and apply it to your backend.  It's possible to get Linux to spin
> > > the drive down, it just takes some effort.
> >
> > The problem with this is it also tends to cycle down the cpus. I have
> > found that to be a problem in terms of load average, cpu utilization,
> > job response time and playback response time.
> >
> > The last thing I would recommend is enabling laptop-mode on any mythtv
> > system.
> None of those items affects the CPUs at all. laptop-mode only tells
> the kernel to delay writes to disk as long as possible which helps
> keep the disks from waking up.

	Ok then. This is just something that came along for the ride
with the cpu scaler when I moved from 7.04 server to 7.10 desktop
on my frontend.

	Since cpu scaling is one of those things also used to manage
power and heat in a laptop I just took it for granted it was part of

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