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SubjectRe: Possible bug from kernel 2.6.22 and above, 2.6.24-rc4

* Jie Chen <chen@jlab.org> wrote:

> Hi, Ingo:
>
> I guess it is a good news. I did patch 2.6.21.7 kernel using your cfs
> patch. The results of pthread_sync is the same as the non-patched
> 2.6.21 kernel. This means the performance of is not related to the
> scheduler. As for overhead of the gettimeofday, there is no difference
> between 2.6.21 and 2.6.24-rc4. The reference time is around 10.5 us
> for both kernel.

could you please paste again the relevant portion of the output you get
on a "good" .21 kernel versus the output you get on a "bad" .24 kernel?

> So what is changed between 2.6.21 and 2.6.22? Any hints :-). Thank you
> very much for all your help.

we'll figure it out i'm sure :)

Ingo


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