--- Begin Message ---
|
Subject: |
Re: Call graph support for powerpc |
A patch authored by myself and Anton Blanchard made it into 2.6.17, and
should provide this without any patching.
--Brian
> 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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>>>
>>>
>>
>
>
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