Thanks folks. I was using 2.6.11 and 2.6.11 didn't have support for call
graphs. But was able to integrates the patches pretty easily and I am
happily profiling with call graphs!
Thx,
Venkat
-----Original Message-----
From: Andy Fleming [mailto:afleming@xxxxxxxxxxxxx]
Sent: Wednesday, October 11, 2006 12:05 PM
To: Maynard Johnson
Cc: Haruki Dai-r35557; Venkat Subbiah -X (vsubbiah - Piepeople
Consulting,Inc. at Cisco); oprofile-list@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: Call graph support for powerpc
I'm pretty sure I've used a recent kernel, unpatched, to do backtracing
with oprofile.
On Oct 10, 2006, at 15:30, Maynard Johnson wrote:
>
> From my understanding of the current arch/powerpc/oprofile code
> (looking at a 2.6.18 kernel), it appears to me that the call graph
> support there would work for both ppc and pp64 processors.
>
> -Maynard
>
> Haruki Dai-r35557 wrote:
>
>> For BookE - e500, Andy Fleming has submit the patch for callgraph
>> kernel support long time ago, but the patch wasn't actually merged (I
>> don't know why). Anyway, here is the patch, and I am not sure the
>> user space apps automatically use/enable the .backtrace without
>> modification.
>>
>> http://patchwork.ozlabs.org/linuxppc/patch?id=2783
>>
>>
>> Regards
>> Dai
>>
>>> -----Original Message-----
>>> From: oprofile-list-bounces@xxxxxxxxxxxxxxxxxxxxx
>>> [mailto:oprofile-list-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of
>>> Maynard Johnson
>>> Sent: Monday, October 09, 2006 4:19 PM
>>> To: Venkat Subbiah -X (vsubbiah - Piepeople Consulting, Inc. at
>>> Cisco)
>>> Cc: oprofile-list@xxxxxxxxxxxxxxxxxxxxx
>>> Subject: Re: Call graph support for powerpc
>>>
>>> Venkat Subbiah -X (vsubbiah - Piepeople Consulting, Inc. at
>>> Cisco) wrote:
>>>
>>>
>>>> Oprofile doesn't support call graph's for powerpc. Has
>>> anybody tried to
>>>
>>>> extend oprofile to support call graph for Power PC?
>>>>
>>> In fact, call graph support for PowerPC was added in the 2.6.17
>>> kernel. As for distros where it's included, SLES 10 is the only one
>>> I know of at this point.
>>>
>>> The FAQ on the OProfile web site states that call graph is supported
>>> only on x86 and ARM. The man page for opcontrol just says "x86". I
>>> could submit a patch to add "PowerPC", but I'm wondering if there
>>> are other arch's out there where callgraph support has been added
>>> recently. Might was well update the FAQ and man page to be as
>>> accurate and up-to-date as possible.
>>>
>>> -Maynard
>>>
>>>
>>>
>>>> Thx,
>>>> Venkat
>>>>
>>>>
>>>>
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>>
>>
>
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