Moblin's X.Org Stack Faster Than In Ubuntu

[Ramakrishna Reddy <ramkrsna gmail com>]

Found this interesting article, interesting way of moblin handling X.

Source :: http://www.phoronix.com/scan.php?page=news_item&px=NzEzNw
Why Is Moblin's X.Org Stack Faster Than In Ubuntu?
Posted by Michael Larabel on March 12, 2009
Canonical's Scott James Remnant recently set out to explore why X.Org
started up so much faster on Moblin than on Ubuntu (particularly, the
latest 9.04 development
code). On an Atom-based netbook (the Dell Mini 9) he found it took
Ubuntu's X Server about four seconds to start before the session
manager was called. With Moblin on the same hardware it took just
about a second and a half.

Scott began analyzing the X Server patch-set for Moblin, that included
enabling UXA acceleration by default, avoiding duplicated saved
hardware states, reducing the driver boot-time, and disabling other
operations. However, Ubuntu already incorporated all of these patches
besides using UXA acceleration. Ubuntu's X Server also has a few extra
patches, but those didn't seem to impact the performance.

After that, Scott came to no conclusions, but has now thrown the ropes
to the principal X maintainer at Canonical (Bryce Harrington) and
their technical leader (Matt Zimmerman). His mailing list message with
Bootchart results can be found on ubuntu-devel. Hopefully by Ubuntu
9.10 (the Karmic Koala) we will see an X Server start-up time closer
to Moblin, but that means cutting the time in at least half. Beyond
just the X Server being speedier, Moblin V2 Core Alpha boots super
fast.

Remnant is also looking at sreadahead vs. readahead performance for
improving Ubuntu's boot performance.

regards
-- 
Ramakrishna Reddy                                               GPG
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