perf/core: Rework forwarding of {task|cpu}-clock events

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Currently, PERF_TYPE_SOFTWARE is treated specially since task-clock and
cpu-clock events are interfaced through it but internally gets forwarded
to their own pmus.

Rework this by overwriting event->attr.type in perf_swevent_init() which
will cause perf_init_event() to retry with updated type and event will
automatically get forwarded to right pmu. With the change, SW pmu no
longer needs to be treated specially and can be included in 'pmu_idr'
list.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20230504110003.2548-2-ravi.bangoria@amd.com

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Ravi Bangoria 2023-05-04 16:30:00 +05:30 • committed by Peter Zijlstra

parent ac9a78681b

commit 0d6d062ca2

2 changed files with 51 additions and 36 deletions

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10

include/linux/perf_event.h

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77

kernel/events/core.c

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