[ubuntu-x] Test kernel for perf issues on -intel

Michael Larabel michael.larabel at phoronix.com
Thu Apr 16 01:33:45 BST 2009

Bryce Harrington wrote:
> Another option which has been suggested is to turn off migration
> altogether:
>    Option "EXAOptimizeMigration" "off"
> This may have the same "benefit" as the greedy migration, but without
> the irritating side effects.  It would be hugely helpful if people could
> test this option (independently from the kernel change) and see if they
> spot any regressions with it set.  Meanwhile I'll try to get some debs
> put together for it.
> Thanks,
> Bryce
> On Wed, Apr 15, 2009 at 11:54:43AM -0700, Bryce Harrington wrote:
>> Tim pointed me to this:
>> ---
>> bryce: 2.6.30-rc2 has a bunch of i915 patches from Dave Arlie. He claims
>> big performance improvements which likely address out issues in
>> Jaunty. Is it possible for you to run that kernel somewhere and test the
>> results?
>>  http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.30-rc2
>> ---
>> If anyone has hardware that they're seeing the -intel performance
>> regression and would be willing to test the above, please do so and
>> report results here.
>> (It would be especially helpful if you could run a 3d game that prints
>> fps, to measure both before and after.)
>> Bryce
>> -- 
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Attached are results using the EXAOptimizeMigration off thrown into the 
mix. This option isn't definitively faster, but there seems to be a few 
areas where it's ahead.

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