linux-kernel - [PATCH v1 1/2] perf docs: Document bpf event modifier

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Date: Tue, 16 Apr 2024 10:00:13 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, Ravi Bangoria <ravi.bangoria@....com>, 
	Athira Rajeev <atrajeev@...ux.vnet.ibm.com>, Song Liu <song@...nel.org>, 
	Thomas Richter <tmricht@...ux.ibm.com>, linux-perf-users@...r.kernel.org, 
	linux-kernel@...r.kernel.org, bpf@...r.kernel.org
Subject: [PATCH v1 1/2] perf docs: Document bpf event modifier

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

Fixes: 01bd8efcec44 ("perf stat: Introduce ':b' modifier")
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/Documentation/perf-list.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt
index 3b12595193c9..6bf2468f59d3 100644
--- a/tools/perf/Documentation/perf-list.txt
+++ b/tools/perf/Documentation/perf-list.txt
@@ -71,6 +71,7 @@ counted. The following modifiers exist:
  D - pin the event to the PMU
  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
+ b - use BPF aggregration (see perf stat --bpf-counters)
 
 The 'p' modifier can be used for specifying how precise the instruction
 address should be. The 'p' modifier can be specified multiple times:
-- 
2.44.0.683.g7961c838ac-goog