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

Jesse Barnes jbarnes at virtuousgeek.org
Tue Dec 13 21:02:52 CET 2011


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?

Thanks,
-- 
Jesse Barnes, Intel Open Source Technology Center
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