Re: F16 slowness

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On Fri, 2011-09-09 at 15:46 -0400, Dave Jones wrote:
> On Fri, Sep 09, 2011 at 12:07:48PM -0500, Mike Chambers wrote:
> 
>  > Below are 4 kernels that I have tested to see what works ok and what
>  > don't.  The 2 3.0 kernels both were extremely slow, and the 2 2.6.40
>  > kernels were both faster and more responsive.  Using the latest 2.6.40
>  > does still have X use up some CPU but haven't seen it get past 25%
>  > compared to the 3.0 kernels both seem to go up past 50% ore more.
>  > 
>  > Seems whatever is the difference in the kernels (diff in how built?), or
>  > whatever the difference in what they are built against might be the
>  > issue, or a combination thereof.  Figure that out and might be onto
>  > something.  Maybe others can try same thing and see what they get.
>  > 
>  > [mike@scrappy ~]$ rpm -q kernel
>  > 
>  > kernel-2.6.40.3-0.fc15.x86_64
>  > kernel-3.1.0-0.rc4.git0.0.fc16.x86_64
>  > kernel-3.0.1-5.fc16.x86_64
>  > kernel-2.6.40.4-5.fc15.x86_64
> 
> you can turn off some of the heavier weight debugging by booting
> the 3.0 kernels with "slub_debug=-"
> (In the 2.6.40 builds, this is only on in the -debug flavor)
> 
> Debugging options are going to be turned off for the next builds
> in time for the beta.

Was debugging on in 3.0.1-3 ? For me, that kernel performs (graphically)
significantly better than any 3.1 kernel. I haven't tried 3.0.1-5 yet.
-- 
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | identi.ca: adamwfedora
http://www.happyassassin.net

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