Bug 22866 - DRI performance varies wildly when playing certain games
Summary: DRI performance varies wildly when playing certain games
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/DRI/i965 (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Ian Romanick
QA Contact:
Keywords: NEEDINFO
Depends on:
Reported: 2009-07-20 23:36 UTC by Eric Appleman
Modified: 2012-05-31 20:12 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

lspci (20.49 KB, text/plain)
2009-07-20 23:36 UTC, Eric Appleman

Description Eric Appleman 2009-07-20 23:36:25 UTC
Created attachment 27866 [details]

I don't know how to describe this bug technically, so I'll refer you all to the related Wine bug report: http://bugs.winehq.org/show_bug.cgi?id=18232

In a nutshell, Game A is >95% code identical to Game B. They share a common engine, libraries, and everything. Both games require 60 fps in order to be playable yet are extremely lightweight in terms of performance. Any computer made within the last 7 years should be able to run both games flawlessly. On Windows, this hold true and both games perform as expected.

However, on Linux, using the latest kernel and git commits for Mesa, DRI, Intel, etc. Game A runs at the required speed (60 fps), but Game B refuses to exceed 20 fps.
Comment 1 Jesse Barnes 2011-06-08 11:23:35 UTC
Maybe hitting a fallback?
Comment 2 Eric Anholt 2011-06-17 14:15:11 UTC
That linked bug report has way too much comment spam, while this one has no useful information.  Please pick a single application, explain what's not working as expected here, and steps to reproduce.  See also http://intellinuxgraphics.org/how_to_report_bug.html
Comment 3 Ian Romanick 2012-05-31 20:12:49 UTC
Closing due to lack of updates in almost a year.

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