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SubjectRe: [PATCH 0/9] Performance counters for POWER

* Paul Mackerras <paulus@samba.org> wrote:

> The following series of patches extends Ingo and Thomas's performance
> counter framework to add support for 64-bit POWER processors.
> Currently I have the PPC970 family and POWER6 done.
>
> The approach I have taken is to do the constraint checking and the
> search through the space of alternative event codes as each group of
> counters is added at the time a task is scheduled in. That means we
> are potentially doing the search several times in a row, with
> interrupts disabled. I think it will be OK since there are only a few
> events that have alternatives (and not many of them), and the
> constraint checking is fast since it is just simple integer
> operations. However, one of the things I plan to do is to instrument
> that code to find out how long it takes in the worst case. (If it
> takes too long then I will need some major changes to the generic
> code.)
>
> This series is also available via git at:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/paulus/perfcounters.git
>
> in the master branch.

Pulled into tip/perfcounters/core, thanks Paul!

Ingo


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