From: Masami Hiramatsu <mhiramat@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: linux-kernel@vger.kernel.org,
Masami Hiramatsu <mhiramat@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
linux-perf-users@vger.kernel.org
Subject: [PATCH 3/3] perf/probe: docs: Add --bootconfig option to perf-probe manual
Date: Sat, 19 Jun 2021 01:11:08 +0900 [thread overview]
Message-ID: <162403266812.528888.12101980553259365416.stgit@devnote2> (raw)
In-Reply-To: <162403264218.528888.2914545241015551186.stgit@devnote2>
Add --bootconfig option and example to the perf-probe manual.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
tools/perf/Documentation/perf-probe.txt | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt
index ed3ecfa422e1..d0908170c3d2 100644
--- a/tools/perf/Documentation/perf-probe.txt
+++ b/tools/perf/Documentation/perf-probe.txt
@@ -103,7 +103,14 @@ OPTIONS
-D::
--definition=::
Show trace-event definition converted from given probe-event instead
- of write it into tracing/[k,u]probe_events.
+ of write it into tracing/[k,u]probe_events. This accepts --bootconfig
+ option.
+
+--bootconfig::
+ Show the trace-event definition in Extra Boot Configuration (bootconfig)
+ syntax. This helps users to write the probe event definitions for the
+ boot-time tracing.
+ Note that this must be used with --definition(-D) option.
--filter=FILTER::
(Only for --vars and --funcs) Set filter. FILTER is a combination of glob
@@ -294,6 +301,12 @@ Add a probe in a source file using special characters by backslash escape
./perf probe -x /opt/test/a.out 'foo\+bar.c:4'
+Define a kprobe event on the line 7 of path_lookup for the boot-time tracing
+and set it to the initrd.img.
+
+ ./perf probe -k /boot/vmlinux --bootconfig -D "path_lookup:7" > tmp.bconf
+ bootconfig -a tmp.bconf /boot/initrd.img
+
SEE ALSO
--------
next prev parent reply other threads:[~2021-06-18 16:11 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-04 16:28 [PATCH 0/3] perf probe: Boot time tracing support Masami Hiramatsu
2021-06-04 16:28 ` [PATCH 1/3] perf/probe: Support probes on init functions for offline kernel Masami Hiramatsu
2021-06-04 16:28 ` [PATCH 2/3] perf/probe: Cleanup synthesize_probe_trace_command Masami Hiramatsu
2021-06-04 16:28 ` [PATCH 3/3] perf/probe: Add --bootconfig to output definition in bootconfig format Masami Hiramatsu
2021-06-18 13:14 ` Arnaldo Carvalho de Melo
2021-06-18 15:07 ` Masami Hiramatsu
2021-06-18 16:10 ` [PATCH 0/3] perf probe: Boot time tracing support followup Masami Hiramatsu
2021-06-18 16:10 ` [PATCH 1/3] [v2] perf/probe: Add --bootconfig to output definition in bootconfig format Masami Hiramatsu
2021-06-18 16:11 ` [PATCH 2/3] perf/probe: Show return probe correctly with --bootconfig Masami Hiramatsu
2021-06-18 16:11 ` Masami Hiramatsu [this message]
2021-06-18 15:55 ` [PATCH 3/3] perf/probe: Add --bootconfig to output definition in bootconfig format Masami Hiramatsu
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