From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Tom Zanussi <zanussi@kernel.org>
Subject: [for-linus][PATCH 06/15] tracing: Add README information for synthetic_events file
Date: Tue, 06 Oct 2020 10:34:52 -0400 [thread overview]
Message-ID: <20201006143511.456924028@goodmis.org> (raw)
In-Reply-To: 20201006143446.182666356@goodmis.org
From: Tom Zanussi <zanussi@kernel.org>
Add an entry with a basic description of events/synthetic_events along
with a simple example.
Link: https://lkml.kernel.org/r/3c7f178cf95aaeebc01eda7d95600dd937233eb7.1601848695.git.zanussi@kernel.org
Signed-off-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
kernel/trace/trace.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 3f2533adae72..73fd0e0c0f39 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -5249,7 +5249,12 @@ static const char readme_msg[] =
"\t trace(<synthetic_event>,param list) - generate synthetic event\n"
"\t save(field,...) - save current event fields\n"
#ifdef CONFIG_TRACER_SNAPSHOT
- "\t snapshot() - snapshot the trace buffer\n"
+ "\t snapshot() - snapshot the trace buffer\n\n"
+#endif
+#ifdef CONFIG_SYNTH_EVENTS
+ " events/synthetic_events\t- Create/append/remove/show synthetic events\n"
+ "\t Write into this file to define/undefine new synthetic events.\n"
+ "\t example: echo 'myevent u64 lat; char name[]' >> synthetic_events\n"
#endif
#endif
;
--
2.28.0
next prev parent reply other threads:[~2020-10-06 14:36 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-06 14:34 [for-linus][PATCH 00/15] tracing: Some final updates for 5.10 Steven Rostedt
2020-10-06 14:34 ` [for-linus][PATCH 01/15] ftrace: Fix some typos in comment Steven Rostedt
2020-10-06 14:34 ` [for-linus][PATCH 02/15] tracing: Change STR_VAR_MAX_LEN Steven Rostedt
2020-10-06 14:34 ` [for-linus][PATCH 03/15] tracing: Fix parse_synth_field() error handling Steven Rostedt
2020-10-06 14:34 ` [for-linus][PATCH 04/15] tracing: Save normal string variables Steven Rostedt
2020-10-06 14:34 ` [for-linus][PATCH 05/15] tracing: Add support for dynamic strings to synthetic events Steven Rostedt
2020-10-06 14:34 ` Steven Rostedt [this message]
2020-10-06 14:34 ` [for-linus][PATCH 07/15] selftests/ftrace: Add test case for synthetic event dynamic strings Steven Rostedt
2020-10-06 14:34 ` [for-linus][PATCH 08/15] tracing: Change synthetic event string format to limit printed length Steven Rostedt
2020-10-06 14:34 ` [for-linus][PATCH 09/15] ftrace: Use fls() to get the bits for dup_hash() Steven Rostedt
2020-10-06 14:34 ` [for-linus][PATCH 10/15] ftrace: Simplify the hash calculation Steven Rostedt
2020-10-06 14:34 ` [for-linus][PATCH 11/15] ftrace: Simplify the dyn_ftrace->flags macro Steven Rostedt
2020-10-06 14:34 ` [for-linus][PATCH 12/15] ftrace: Simplify the calculation of page number for ftrace_page->records Steven Rostedt
2020-10-06 14:34 ` [for-linus][PATCH 13/15] ftrace: Format variable declarations of ftrace_allocate_records Steven Rostedt
2020-10-06 14:35 ` [for-linus][PATCH 14/15] ftrace: ftrace_global_list is renamed to ftrace_ops_list Steven Rostedt
2020-10-06 14:35 ` [for-linus][PATCH 15/15] tracing: Remove a pointless assignment Steven Rostedt
2020-10-06 15:01 ` [for-linus][PATCH 00/15] tracing: Some final updates for 5.10 Steven Rostedt
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