Bug 63717

Summary:	Poor performance in games with Intel 965GM
Product:	Mesa	Reporter:	John13 <ionion1911>
Component:	Drivers/DRI/i965	Assignee:	mesa-dev
Status:	RESOLVED WONTFIX	QA Contact:	Intel 3D Bugs Mailing List <intel-3d-bugs>
Severity:	normal
Priority:	medium	CC:	eero.t.tamminen, felix.schwarz
Version:	9.0
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description John13 2013-04-19 10:09:46 UTC

I don't know if this is a bug or not but on windows when I play counter-strike condition zero maps(that have more detailed textures than Counter Strike 1.6 maps) I get 50-80 fps,sometimes 100fps but on Linux I get 20-40fps.I tried to play with driconf but I didn't get any improvements.I know that Linux drivers are not as good as Windows ones but this is a big difference.

I use Xubuntu 12.10 x64
glxinfo: 
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) 965GM 
OpenGL version string: 2.1 Mesa 9.0.3
OpenGL shading language version string: 1.20

PS: I use OpenGL to render on both Windows and Linux.

Comment 1 Eero Tamminen 2013-09-19 12:54:08 UTC

I don't know whether there's somebody still looking after the performance of the old Gen4 chips.  You could try analyze the problem yourself with these instructions:
  http://dri.freedesktop.org/wiki/IntelPerformanceTuning/

I.e. start checking whether the issues is in CPU or GPU usage etc.

Note that the desktop environment you use, can also have effect on performance.

Comment 2 Ian Romanick 2014-02-26 23:23:32 UTC

I don't think we're going to do any performance work for 965GM... unless we make changes for a later GPU that happens to also help the older GPUs.

I'm going to leave this bug open because it might be an interesting project for someone.

Comment 3 Kenneth Graunke 2014-02-27 09:12:35 UTC

I suspect that upgrading to Mesa 10.1 (due to be released in a few days) should help quite a bit, though I haven't measured it.

In particular, Matt's vectorizer work reduces sequences of 4 extended math operations down to 1.  On 965GM, extended math is done on a single mathbox shared across all EUs (IIRC), so reducing math usage should have a significant impact on performance.

Comment 4 Matt Turner 2015-02-11 23:57:38 UTC

I'm going to mark as RESOLVED/WONTFIX because no one is going to focus on 965GM performance (sorry). Various optimizations will trickle down to 965GM though.

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