Messages in this thread | | | Subject | Re: [patch] oprofile for ppc | From | Albert Cahalan <> | Date | 07 Mar 2003 13:31:01 -0500 |
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On Fri, 2003-03-07 at 05:13, Benjamin Herrenschmidt wrote: > On Fri, 2003-03-07 at 10:29, Albert D. Cahalan wrote:
>> This is basic timer profiling for ppc, tested on the >> 2.5.62 linuxppc kernel. It's a port of the ppc64 code. > > I'm sure I missed something... but I fail to see the the > interest in profiling based on sampling the instruction ptr > on a 100 Hz basis. This is way to slow to give any useful > results imho
This is just the first part of the code. Please merge it into any tree you have, unless it's obviously broken. It is useful for long-running processes that don't do much that is tied to the clock tick. (number crunching, maybe X, web browsers without animations, /tmp cleaner...)
The i386 port is already using 1000 Hz in the kernel, and has 100 Hz as a non-default option. I'd really like to have this on my Mac; lots of things would improve.
I intend to allow sampling based on the performance counter interrupt/trap/exception and the external interrupt signal.
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