Bug 11727 - Latest Mesa + DRI is terrible slow on Intel i915
Summary: Latest Mesa + DRI is terrible slow on Intel i915
Status: RESOLVED NOTABUG
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/DRI/i915 (show other bugs)
Version: git
Hardware: Other All
: medium normal
Assignee: Default DRI bug account
QA Contact:
URL:
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Keywords:
Depends on:
Blocks:
 
Reported: 2007-07-26 05:04 UTC by Lukas Hejtmanek
Modified: 2009-08-24 12:27 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

Attachments
Output of LIBGL_DEBUG=verbose (761 bytes, text/plain)
2007-07-26 05:39 UTC, Lukas Hejtmanek 		Details
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Description Lukas Hejtmanek 2007-07-26 05:04:18 UTC 
Latest Mesa and DRI (dri head 4175dd818110bd10d6d09190d30c271e89202b18 and mesa head 03ec41ddc51e539c989a546f33d22daa2af69095) is terrible slow on Intel. (glxgears is about 200FPS, ppracer runs at 3.6FPS, used to run on 1000FPS and 35FPS, resp.)
Comment 1 Michel Dänzer 2007-07-26 05:36:58 UTC 
Maybe you're not getting hardware acceleration. Please attach (as opposed to paste) the output of

LIBGL_DEBUG=verbose glxgears 2>&1
Comment 2 Lukas Hejtmanek 2007-07-26 05:39:43 UTC 
Created attachment 10886 [details]
Output of LIBGL_DEBUG=verbose
Comment 3 Michel Dänzer 2007-07-26 06:00:14 UTC 
Looks fine... can you try isolating the problem with git-bisect?
Comment 4 Lukas Hejtmanek 2007-07-26 07:12:40 UTC 
I will give a try this weekend.
Comment 5 Lukas Hejtmanek 2007-07-26 13:39:59 UTC 
OK, the problem is that the latest Intel driver disables Tiling on i915 (due to XV corruption and lockup). Disabled tiling of depth and back buffers causes terrible slow down. So this bug can be closed.
Comment 6 Adam Jackson 2009-08-24 12:27:26 UTC 
Mass version move, cvs -> git

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