[Intel-gfx] i915_init takes a full second of kernel init time

Scott James Remnant keybuk at google.com
Tue Dec 13 22:34:38 CET 2011


On Tue, Dec 13, 2011 at 12:02 PM, Jesse Barnes <jbarnes at virtuousgeek.org> wrote:
> On Tue, 13 Dec 2011 11:55:06 -0800
> Scott James Remnant <keybuk at google.com> wrote:
>
>> I've been investigating Chrome OS boot time and noticed the anomaly
>> where i915_init takes up a considerable amount of kernel startup time,
>> one second in fact. I've attached a full dmesg with drm.debug=0xff for
>> analysis at Daniel's suggestion.
>
> I'm not surprised... we haven't optimized init time in awhile and lots
> of delays have crept in.
>
> What kind of panel does this laptop have?  Can you enable drm debugging
> (drm.debug=1 on the boot line) and see where the big delays are in
> modesetting?
>
Is this different to drm.debug=0xff ?

Scott
-- 
Scott James Remnant | Chrome OS Systems | keybuk at google.com | Google



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