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

Colin Guthrie intel at colin.guthr.ie
Sat Apr 4 17:38:12 CEST 2009

'Twas brillig, and Thomas Bächler at 04/04/09 15:36 did gyre and gimble:
> Sergio Monteiro Basto schrieb:
>> On Sat, 2009-04-04 at 14:44 +0200, Thomas Bächler wrote:
>>> 1) With KMS enabled, 2.6.29-rc1 was already bad and everything before 
>>> that seemed broken.
>> At this time, maybe update and recompile libdrm 2.4.5 and Mesa 7.4 could
>> help .
>> Ajax on libdrm-2.4.5-3.fc10.src.rpm pick some code from git of libdrm,
>> which is the version that I am using ...
>> Best regards, 
> Forgot to mention that: I already updated to Mesa 7.4 and libdrm 2.4.5 
> (actually, I think most of 2.4.6 is already patched in here as well). 
> This changed nothing, performance is still the same on 2.6.29 (with and 
> without KMS). Right now I only care about having good performance at all 
> (with or without KMS).

As I mentioned earlier I strongly suspect that this is related to:

You should try applying the kernel patch and disable GEM to see if this 
work (KMS will not work in this scenario and you'll have to use EXA).

Currently for me, I'm using a 2.6.27 kernel (thus non-GEM) and git tips 
of libdrm and intel 2.7 branch + mesa 7.4 and performance is good (well 
as good as it's always been!)

I'm just waiting for our kernel package to include the gem-disabling 
patch to test a newer kernel.

Eric last night push a libdrm patch to fix the issue properly, but it 
will need a corresponding mesa patch to be written too from what I gather.




|     Colin Guthrie      |
| http://colin.guthr.ie/ |

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