Bug 22658

Summary:	Performance regression with XAA offscreen pixmaps defaulting to disabled
Product:	xorg	Reporter:	Ondrej Zary <linux>
Component:	Server/General	Assignee:	Xorg Project Team <xorg-team>
Status:	RESOLVED INVALID	QA Contact:	Xorg Project Team <xorg-team>
Severity:	normal
Priority:	medium
Version:	7.4 (2008.09)
Hardware:	All
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Ondrej Zary 2009-07-07 06:44:22 UTC

At least on my Radeon 9550 (RV350), disabling the XAA Offscreen Pixmaps by default (as done by commit 0c6987df3b9b3a37d201d740d8248c326449835e) causes bad performance. Basic things are slow - like drawing the desktop wallpaper at KDE startup - I can clearly see how it draws from top of the screen to the bottom.

Enabling XAA Ofscreen Pixmaps again (Option "XaaOffscreenPixmaps" "on") fixes that.

And no, EXA does not make it better. EXA is slow no matter what I do.

Comment 1 Adam Jackson 2014-04-08 14:12:14 UTC

Well XAA's not coming back, so.

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