[Intel-gfx] Intel 945GM with >=2.6 and newer kernels: massive performance and or memory leak problems

[Jin, Gordon]

Thomas B?chler wrote on Sunday, March 29, 2009 11:52 PM:
> This is a summary of my experience with latest Intel developments: All
> comments below apply to a KDE 4.2 Desktop with compositing enabled on
> Arch Linux x86_64 and an Intel 945GM / Core 2 Duo CPU.
> 
> - 2.4 driver, Linux 2.6.28 and older, don't remember the Mesa version:
> Using EXA, performance was okay, but not very good. Leaked a few
> hundred MB of memory within a week of active usage.
> 
> - 2.6 driver, Linux 2.6.28, Mesa 7.3:
> Using EXA, the performance is bad, you can count the FPS with the
> bare eye. Using UXA, it is amazingly fast (faster as ever before),
> but it leaks hundreds of megabytes of memory within hours. After two
> or three suspend/resume cycles and one day of active usage, the X
> server uses 
> over 1GB of memory! Even without suspend/resume cycles, it may use
> over 500MB of memory within only 6 hours.
> This applies to both the 2.6.3 and 2.6.99.902 driver.
> 
> - 2.6 driver, Linux 2.6.29, Mesa 7.3
> Using EXA or UXA, the performance is very bad (as with EXA in the
> above section), I have to disable compositing to be able to work at
> all. This seems like a huge performance regression in 2.6.29! It is
> the same with and without KMS enabled.
> I can't say anything about the memory problems, as I didn't use it
> with compositing long enough to find out.
> 
> - 2.6 driver, linux-2.6.git tree, Mesa 7.3
> Basically, same as the last section, except the "weird colors" are
> fixed when enabling KMS.
> 
> So my question is:
> 1) How do I get composite performance back with 2.6.29 and newer
> kernels? 2) How do I get rid of the massive memory leaks I experience
> with UXA? 

The memory leak is being tracked at http://bugs.freedesktop.org/show_bug.cgi?id=20704.

Thanks
Gordon