ARM A9 oprofile

Ming Lei ming.lei at canonical.com
Sat Feb 25 03:24:08 UTC 2012


On Fri, Feb 24, 2012 at 9:56 PM, Dmitry Antipov
<dmitry.antipov at linaro.org> wrote:
> On 02/24/2012 01:44 PM, Ming Lei wrote:
>
>> Could you share us how you reproduced the problem? and which
>> kernel are you used to reproduce it?
>
>
> The kernel is Linus' tree (bb4c7e9a9908548b458f34afb2fee74dc0d49f90),
> .config is attached. HW is Panda board (OMAP4430). Reproduced by
> just starting oprofile:
>
> opcontrol --vmlinux=vmlinux
> opcontrol --start
>
> then waiting a few seconds to hit an unhandled IRQs threshold.

Looks I didn't observe the problem with 'perf', so could you run 'perf'
to see if same thing can be found?

Also I will try run 'oprofile' on my pandaboard to test next week.

BTW: suggest you to apply the recent arm pmu irq fix patches[1] to
test 'oprofile'.

[1], http://marc.info/?t=133001284900005&r=1&w=2

thanks,
--
Ming Lei



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