[Intel-gfx] high number of wakeups/second shown with 2.5 branch

Eric Anholt eric at anholt.net
Tue Oct 21 00:22:58 CEST 2008


On Mon, 2008-10-20 at 22:51 +0200, Lukas Hejtmanek wrote:
> On Mon, Oct 20, 2008 at 01:31:20PM -0700, Eric Anholt wrote:
> > > The workload is a plain 2D desktop (no compositing), with clicking
> > > around a bit, scrolling, changing window focus etc. A completely idle
> > > desktop with no moving parts doesn't produce any wakeups in the i915
> > > driver.
> > 
> > Sounds like exactly expected behavior then.
> 
> I guess, people around powertop will not like this behavior..

powertop helps you decrease interrupts to decrease power consumption on
an idle system.  In this case, we're saving power on an active system by
letting the CPU sleep at all instead of spinning waiting for results.

-- 
Eric Anholt
eric at anholt.net                         eric.anholt at intel.com


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