Re: [PATCH 3/4] perf tools: Fix probing the kernel API with cpu-wide events

From: Namhyung Kim
Date: Wed Aug 13 2014 - 01:38:03 EST


On Tue, 12 Aug 2014 18:04:30 +0300, Adrian Hunter wrote:
> Fall back to probing with the current pid if cpu-wide
> probing fails. This primarily affects the setting of
> comm_exec flag when the user is un-privileged and
> /proc/sys/kernel/perf_event_paranoid > 0. The change
> to comm_exec can be observed by using -vv with
> perf record and a kernel that supports comm_exec.

Maybe I'm missing something - why not just try process-wide probing in
the first place?

Thanks,
Namhyung
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