Messages in this thread | | | Date | Sun, 11 Jan 2009 02:44:29 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH 0/9] Performance counters for POWER |
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* 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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