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Subject: Re: [patch] oprofile for ppc
From: Albert Cahalan <albert@users.sf.net>
To: mikpe@csd.uu.se
Cc: Andrew Fleming <afleming@motorola.com>,
       Segher Boessenkool <segher@koffie.nl>,
       Albert Cahalan <albert@users.sourceforge.net>,
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On Tue, 2003-03-11 at 18:30, mikpe@csd.uu.se wrote:
>>>>> Benjamin Herrenschmidt wrote:

>>>>>> Beware though that some G4s have a nasty bug that
>>>>>> prevents using the performance counter interrupt
>>>>>> (and the thermal interrupt as well).
...
> Is this bug restricted to 7400/7410 only, or does it
> affect the 750 (and relatives) and 604/604e too?
>
> I'm thinking about ppc support for my perfctr driver,
> and whether overflow interrupts are worth supporting
> or not given the errata.

604/604e doesn't even have performance monitoring AFAIK.
I've heard nothing to suggest that the 750 is affected.

I'll give you a hand; point me to the latest perfctr code
and explain how it is supposed to interact with oprofile.


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