perf not capturing stack traces

Hi,

On Sat, Jan 24, 2015 at 12:12:04PM -0300, Arnaldo Carvalho de Melo wrote:

Em Fri, Jan 23, 2015 at 04:37:45PM -0600, Felipe Balbi escreveu:

quoted

On Fri, Jan 23, 2015 at 05:59:59PM -0300, Arnaldo Carvalho de Melo wrote:

quoted

Em Fri, Jan 23, 2015 at 01:51:28PM -0600, Felipe Balbi escreveu:

quoted

I'm using v3.19-rc5 on an ARM Cortex A9 board. Unfortunately, perf is
not able to capture any stack traces even though I CONFIG_STACKTRACE,
CONFIG_FRAME_POINTER and CONFIG_ARM_UNWIND all enabled.

I wonder if anybody else is facing similar issues.

Did it work with a previous kernel?

haven't checked with this board. First time I tried to use perf for
anything.

And it is the first time I've heard about such a problem, not dealing
with ARM myself, so I guess this is a case for looking if there was some
previous kernel where this worked, then trying to bisect where the
problem was introduced :-\

yeah, I'll try a few older kernels, also see if I can reproduce on other
boards.

cheers

-- 
balbi
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