perf: Add PERF_EV_CAP_READ_SCOPE

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Usually, an event can be read from any CPU of the scope. It doesn't need
to be read from the advertised CPU.

Add a new event cap, PERF_EV_CAP_READ_SCOPE. An event of a PMU with
scope can be read from any active CPU in the scope.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240802151643.1691631-3-kan.liang@linux.intel.com

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Kan Liang 2024-08-02 08:16:38 -07:00 • committed by Peter Zijlstra

parent 4ba4f1afb6

commit a48a36b316

2 changed files with 14 additions and 3 deletions

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3

include/linux/perf_event.h

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14

kernel/events/core.c

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