Arnaldo Carvalho de Melo <a...@redhat.com> writes:
> I've just blindly followed the provided documentation :)
Yes, I should have checked it also before I sent it out. :)
> So you say I should have tried this instead:
>
> # perf record -c 10000 -e '{intel_pt/branch=0/,cycles/aux-output/ppp}' uname
Right. For the purposes of illustrating the error condition, you can
probably drop the '-c ...' and 'branch=0' also, but either way is fine.
> Error:
> The 'aux_output' feature is not supported, update the kernel.
Or it's not supported by the hardware. I don't think we make a
distinction at the moment. You can tell if it's available from dmesg,
but not otherwise.
> #
>
> Or with leader sampling?
>
> # perf record -c 10000 -e '{intel_pt/branch=0/,cycles/aux-output/ppp}:S'
> uname
Not sure if we should even allow this. Maybe Adrian can chime in.
Thanks,
--
Alex
