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tools/perf: Allow inherit + PERF_SAMPLE_READ when opening events

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The "perf record" tool will now default to this new mode if the user
specifies a sampling group when not in system-wide mode, and when
"--no-inherit" is not specified.

This change updates evsel to allow the combination of inherit
and PERF_SAMPLE_READ.

A fallback is implemented for kernel versions where this feature is not
supported.

Signed-off-by: Ben Gainey <ben.gainey@arm.com>
Cc: james.clark@arm.com
Link: https://lore.kernel.org/r/20241001121505.1009685-3-ben.gainey@arm.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Ben Gainey 2024-10-01 13:15:05 +01:00 • committed by Namhyung Kim
commit 90035d3cd8
10 changed files with 169 additions and 5 deletions
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