performance monitor exceptions

[benh at kernel.crashing.org]

>Thats rather ugly :( BTW I have run kernel profiling off the performance
>monitor exception on ppc64 which has been very useful (it allowed us
>to profile inside interrupt disabled regions)

A workaround for pmac or openpic ppc32 is to use the keylargo or the
openpic timer instead of the DEC. That could be a "kernel hacking" option

Ben.


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