From: Tom Zanussi <zanussi@kernel.org>
To: rostedt@goodmis.org
Cc: tglx@linutronix.de, mhiramat@kernel.org, namhyung@kernel.org,
vedang.patel@intel.com, bigeasy@linutronix.de,
joel@joelfernandes.org, mathieu.desnoyers@efficios.com,
julia@ni.com, linux-kernel@vger.kernel.org,
linux-rt-users@vger.kernel.org
Subject: [PATCH v7 03/16] tracing: Add hist trigger handler.action documentation to README
Date: Wed, 14 Nov 2018 14:18:00 -0600 [thread overview]
Message-ID: <d3b7e77fb2157fa679ea0dc87d8483b5fd8429c6.1542221863.git.tom.zanussi@linux.intel.com> (raw)
In-Reply-To: <cover.1542221862.git.tom.zanussi@linux.intel.com>
In-Reply-To: <cover.1542221862.git.tom.zanussi@linux.intel.com>
From: Tom Zanussi <tom.zanussi@linux.intel.com>
Add abbreviated documentation for handlers and actions to README.
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
---
kernel/trace/trace.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index ff1c4b20cd0a..998955dcc3ca 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -4686,6 +4686,7 @@ static const char readme_msg[] =
"\t [:size=#entries]\n"
"\t [:pause][:continue][:clear]\n"
"\t [:name=histname1]\n"
+ "\t [:<handler>.<action>]\n"
"\t [if <filter>]\n\n"
"\t When a matching event is hit, an entry is added to a hash\n"
"\t table using the key(s) and value(s) named, and the value of a\n"
@@ -4727,7 +4728,16 @@ static const char readme_msg[] =
"\t The enable_hist and disable_hist triggers can be used to\n"
"\t have one event conditionally start and stop another event's\n"
"\t already-attached hist trigger. The syntax is analagous to\n"
- "\t the enable_event and disable_event triggers.\n"
+ "\t the enable_event and disable_event triggers.\n\n"
+ "\t Hist trigger handlers and actions are executed whenever a\n"
+ "\t a histogram entry is added or updated. They take the form:\n\n"
+ "\t <handler>.<action>\n\n"
+ "\t The available handlers are:\n\n"
+ "\t onmatch(matching.event) - invoke on addition or update\n"
+ "\t onmax(var) - invoke if var exceeds current max\n\n"
+ "\t The available actions are:\n\n"
+ "\t <synthetic_event>(param list) - generate synthetic event\n"
+ "\t save(field,...) - save current event fields\n"
#endif
;
--
2.14.1
next prev parent reply other threads:[~2018-11-14 20:18 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-14 20:17 [PATCH v7 00/16] tracing: Hist trigger snapshot and onchange additions Tom Zanussi
2018-11-14 20:17 ` [PATCH v7 01/16] tracing: Refactor hist trigger action code Tom Zanussi
2018-11-14 20:17 ` [PATCH v7 02/16] tracing: Make hist trigger Documentation better reflect actions/handlers Tom Zanussi
2018-11-14 20:18 ` Tom Zanussi [this message]
2018-11-14 20:18 ` [PATCH v7 04/16] tracing: Split up onmatch action data Tom Zanussi
2018-11-14 20:18 ` [PATCH v7 05/16] tracing: Generalize hist trigger onmax and save action Tom Zanussi
2018-11-23 2:50 ` Namhyung Kim
2018-12-03 22:22 ` Tom Zanussi
2018-12-04 7:25 ` Namhyung Kim
2018-12-04 19:53 ` Tom Zanussi
2018-11-23 7:01 ` Namhyung Kim
2018-11-27 22:48 ` Tom Zanussi
2018-11-14 20:18 ` [PATCH v7 06/16] tracing: Add conditional snapshot Tom Zanussi
2018-11-14 20:18 ` [PATCH v7 07/16] tracing: Add hist trigger snapshot() action Tom Zanussi
2018-11-14 20:18 ` [PATCH v7 08/16] tracing: Add hist trigger snapshot() action Documentation Tom Zanussi
2018-11-14 20:18 ` [PATCH v7 09/16] tracing: Add hist trigger snapshot() action test case Tom Zanussi
2018-11-26 13:03 ` Masami Hiramatsu
2018-11-27 22:53 ` Tom Zanussi
2018-11-28 2:15 ` Masami Hiramatsu
2018-11-29 1:12 ` Tom Zanussi
2018-12-04 19:59 ` Tom Zanussi
2018-11-14 20:18 ` [PATCH v7 10/16] tracing: Add hist trigger onchange() handler Tom Zanussi
2018-11-14 20:18 ` [PATCH v7 11/16] tracing: Add hist trigger onchange() handler Documentation Tom Zanussi
2018-11-14 20:18 ` [PATCH v7 12/16] tracing: Add hist trigger onchange() handler test case Tom Zanussi
2018-11-14 20:18 ` [PATCH v7 13/16] tracing: Add alternative synthetic event trace action syntax Tom Zanussi
2018-11-14 20:18 ` [PATCH v7 14/16] tracing: Add alternative synthetic event trace action test case Tom Zanussi
2018-11-14 20:18 ` [PATCH v7 15/16] tracing: Add hist trigger action 'expected fail' " Tom Zanussi
2018-11-14 20:18 ` [PATCH v7 16/16] tracing: Add SPDX license GPL-2.0 license identifier to inter-event testcases Tom Zanussi
2018-11-26 14:09 ` [PATCH v7 00/16] tracing: Hist trigger snapshot and onchange additions Masami Hiramatsu
2018-11-26 21:21 ` Tom Zanussi
2018-11-29 13:52 ` Masami Hiramatsu
2018-11-29 14:54 ` Masami Hiramatsu
2018-11-29 15:07 ` [PATCH] sefltests/ftrace: Use /bin/echo for output with options Masami Hiramatsu
2018-11-29 16:32 ` Steven Rostedt
2018-11-29 16:43 ` Tom Zanussi
2018-11-29 16:49 ` Steven Rostedt
2019-03-04 20:09 ` Tom Zanussi
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