Re: Wrong Perf Backtraces

Em Wed, Mar 25, 2020 at 04:46:43PM +0100, Jiri Olsa escreveu:
> On Wed, Mar 25, 2020 at 07:48:39PM +0430, ahmadkhorrami wrote:
> > Hi,
> > 
> > Could you give me some hints about where the actual problem takes place? Is
> > the problem with "Perf" or the hardware part (i.e., "Hardware Performance
> > Counters")? Can I revise the problem by simply modifying the code? How much
> > work is needed?
> 
> heya,
> might be some callchain processing bug, but I can't reproduce it on my setup..
> would you have/make some simple example that would reproduce the issue?
> 
> Another option is that you'd send perf.data together with 'perf archive' data.
> 
> Also.. we support 2 dwarf unwinders (libunwind/libdw).. not sure which one you
> have compiled in, but would be helpful to see if the other shows the same.

perf -vv

+

ldd `which perf`

Output will help us find out which unwinder is being used, as well as
the version of perf being used.

- Arnaldo