> The git bisect log (see attached) pointed at this commit:

bisect must be wrong. The commit only changes the perf tool, so cannot
break anything in the kernel.

-Andi

> 
> commit c2b3c170db610896e4e633cba2135045333811c2 (HEAD, refs/bisect/bad)
> Author: Andi Kleen <[email protected]>
> Date:   Tue Mar 26 15:18:20 2019 -0700
> 
>     perf stat: Revert checks for duration_time
>     
>     This reverts e864c5ca145e ("perf stat: Hide internal duration_time
>     counter") but doing it manually since the code has now moved to a
>     different file.
>     
>     The next patch will properly implement duration_time as a full event, so
>     no need to hide it anymore.
>     
>     Signed-off-by: Andi Kleen <[email protected]>
>     Acked-by: Jiri Olsa <[email protected]>
>     Link: http://lkml.kernel.org/r/[email protected]
>     Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
> 
> Is this a known issue?

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