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perf docs: Document bpf event modifier

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[ Upstream commit eb4d27cf9aef3e6c9bcaf8fa1a1cadc2433d847b ]

Document that 'b' is used as a modifier to make an event use a BPF
counter.

Fixes: 01bd8efcec ("perf stat: Introduce ':b' modifier")
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Song Liu <song@kernel.org>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Link: https://lore.kernel.org/r/20240416170014.985191-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ian Rogers
2024-04-16 10:00:13 -07:00
committed by Greg Kroah-Hartman
parent 4df97442a0
commit 08ccc5d4d1
1 changed files with 1 additions and 0 deletions
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tools/perf/Documentation/perf-list.txt
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@@ -63,6 +63,7 @@ counted. The following modifiers exist:
D - pin the event to the PMU D - pin the event to the PMU
W - group is weak and will fallback to non-group if not schedulable, W - group is weak and will fallback to non-group if not schedulable,
e - group or event are exclusive and do not share the PMU e - group or event are exclusive and do not share the PMU
b - use BPF aggregration (see perf stat --bpf-counters)
The 'p' modifier can be used for specifying how precise the instruction The 'p' modifier can be used for specifying how precise the instruction
address should be. The 'p' modifier can be specified multiple times: address should be. The 'p' modifier can be specified multiple times: