linux-kernel - [PATCH v5 4/4] perf-stat: add documentation for -b option

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Date:   Tue, 15 Dec 2020 10:14:12 -0800
From:   Song Liu <songliubraving@...com>
To:     <linux-kernel@...r.kernel.org>
CC:     <acme@...nel.org>, <peterz@...radead.org>, <mingo@...hat.com>,
        <alexander.shishkin@...ux.intel.com>, <namhyung@...nel.org>,
        <mark.rutland@....com>, <jolsa@...hat.com>, <kernel-team@...com>,
        Song Liu <songliubraving@...com>
Subject: [PATCH v5 4/4] perf-stat: add documentation for -b option

Add documentation to perf-stat -b option, which stats event for BPF
programs.

Signed-off-by: Song Liu <songliubraving@...com>
---
 tools/perf/Documentation/perf-stat.txt | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt
index 5d4a673d7621a..15b9a646e853d 100644
--- a/tools/perf/Documentation/perf-stat.txt
+++ b/tools/perf/Documentation/perf-stat.txt
@@ -75,6 +75,20 @@ report::
 --tid=<tid>::
         stat events on existing thread id (comma separated list)
 
+-b::
+--bpf-prog::
+        stat events on existing bpf program id (comma separated list),
+        requiring root righs. For example:
+
+  # perf stat -e cycles,instructions --bpf-prog 17247 --timeout 1000
+
+   Performance counter stats for 'BPF program(s) 17247':
+
+             85,967      cycles
+             28,982      instructions              #    0.34  insn per cycle
+
+        1.102235068 seconds time elapsed
+
 ifdef::HAVE_LIBPFM[]
 --pfm-events events::
 Select a PMU event using libpfm4 syntax (see http://perfmon2.sf.net)
-- 
2.24.1