Re: Wrong Perf Backtraces

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Thanks. But should I attach the files to the e-mail?

On 2020-03-25 23:28, Arnaldo Carvalho de Melo wrote:

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?
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 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

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