* David Ahern <dsah...@gmail.com> wrote:
> Currently perf-stat attempts to show counter stats even if the workload
> is bogus:
>
> $ perf stat -- foo
> foo: No such file or directory
>
> Performance counter stats for 'foo':
>
> <not counted> task-clock
> <not counted> context-switches
> <not counted> cpu-migrations
> <not counted> page-faults
> <not counted> cycles
> <not counted> stalled-cycles-frontend
> <not counted> stalled-cycles-backend
> <not counted> instructions
> <not counted> branches
> <not counted> branch-misses
>
> 0.009769943 seconds time elapsed
>
> It is impossible to differentiate all the failure modes, but it seems
> reasonable that if the workload handling fails, perf-stat should not try
> to print stats.
>
> With this change:
>
> $ perf stat -v -- foo
> Failed to start workload
>
> Signed-off-by: David Ahern <dsah...@gmail.com>
> Cc: Ingo Molnar <mi...@kernel.org>
> Cc: Stephane Eranian <eran...@google.com>
Nice!
Acked-by: Ingo Molnar <mi...@kernel.org>
Thanks,
Ingo
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