Ingo Molnar <mingo@xxxxxxx> wrote:
>
>perf record -g will go a long way towards such a tool already - but i
>think it would be useful to create a more top-alike view as well.
perf record -g doesn't help when the issue is that we're recording a single process and the actual work is being done in another unrelated process that is just being woken up.
Sure, you can do a system wide recording, but that shows all kinds of unrelated noise and requires root permissions.
So those rcu threads really need to go.
Linus
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