From: Namhyung Kim <namhyung@kernel.org>
To: Tom Zanussi <tom.zanussi@linux.intel.com>
Cc: rostedt@goodmis.org, daniel.wagner@bmw-carit.de,
masami.hiramatsu.pt@hitachi.com, josh@joshtriplett.org,
andi@firstfloor.org, mathieu.desnoyers@efficios.com,
peterz@infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v11 22/28] tracing: Add enable_hist/disable_hist triggers
Date: Tue, 3 Nov 2015 17:55:55 +0900 [thread overview]
Message-ID: <20151103085555.GC20951@danjae.kornet> (raw)
In-Reply-To: <4dac5a3f26463f69c361ac68cbc992a5d227f553.1445530672.git.tom.zanussi@linux.intel.com>
On Thu, Oct 22, 2015 at 01:14:26PM -0500, Tom Zanussi wrote:
> Similar to enable_event/disable_event triggers, these triggers enable
> and disable the aggregation of events into maps rather than enabling
> and disabling their writing into the trace buffer.
>
> They can be used to automatically start and stop hist triggers based
> on a matching filter condition.
>
> If there's a paused hist trigger on system:event, the following would
> start it when the filter condition was hit:
>
> # echo enable_hist:system:event [ if filter] > event/trigger
>
> And the following would disable a running system:event hist trigger:
>
> # echo disable_hist:system:event [ if filter] > event/trigger
What about named hist triggers? Maybe worth adding
"enable/disable_hist_name" too?
Thanks,
Namhyung
>
> See Documentation/trace/events.txt for real examples.
>
> Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
> Tested-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
next prev parent reply other threads:[~2015-11-03 8:56 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-22 18:14 [PATCH 00/28] tracing: 'hist' triggers Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 01/28] tracing: Update cond flag when enabling or disabling a trigger Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 02/28] tracing: Make ftrace_event_field checking functions available Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 03/28] tracing: Make event trigger " Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 04/28] tracing: Add event record param to trigger_ops.func() Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 05/28] tracing: Add get_syscall_name() Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 06/28] tracing: Add a per-event-trigger 'paused' field Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 07/28] tracing: Add needs_rec flag to event triggers Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 08/28] tracing: Add lock-free tracing_map Tom Zanussi
2015-10-29 8:31 ` Namhyung Kim
2015-10-29 18:35 ` Tom Zanussi
2015-11-02 7:08 ` Namhyung Kim
2015-11-04 1:47 ` Tom Zanussi
2015-11-04 2:26 ` Namhyung Kim
2015-11-04 2:56 ` Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 09/28] tracing: Add 'hist' event trigger command Tom Zanussi
2015-10-29 9:11 ` Namhyung Kim
2015-10-29 18:37 ` Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 10/28] tracing: Add hist trigger support for multiple values ('vals=' param) Tom Zanussi
2015-11-02 7:42 ` Namhyung Kim
2015-10-22 18:14 ` [PATCH v11 11/28] tracing: Add hist trigger support for compound keys Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 12/28] tracing: Add hist trigger support for user-defined sorting ('sort=' param) Tom Zanussi
2015-11-02 8:03 ` Namhyung Kim
2015-10-22 18:14 ` [PATCH v11 13/28] tracing: Add hist trigger support for pausing and continuing a trace Tom Zanussi
2015-11-03 8:38 ` Namhyung Kim
2015-11-04 1:53 ` Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 14/28] tracing: Add hist trigger support for clearing " Tom Zanussi
2015-11-03 8:43 ` Namhyung Kim
2015-10-22 18:14 ` [PATCH v11 15/28] tracing: Add hist trigger 'hex' modifier for displaying numeric fields Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 16/28] tracing: Add hist trigger 'sym' and 'sym-offset' modifiers Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 17/28] tracing: Add hist trigger 'execname' modifier Tom Zanussi
2015-11-02 14:10 ` Namhyung Kim
2015-11-04 2:37 ` Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 18/28] tracing: Add hist trigger 'syscall' modifier Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 19/28] tracing: Add hist trigger support for stacktraces as keys Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 20/28] tracing: Support string type key properly Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 21/28] tracing: Remove restriction on string position in hist trigger keys Tom Zanussi
2015-11-02 14:40 ` Namhyung Kim
2015-10-22 18:14 ` [PATCH v11 22/28] tracing: Add enable_hist/disable_hist triggers Tom Zanussi
2015-11-03 8:55 ` Namhyung Kim [this message]
2015-11-04 1:58 ` Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 23/28] tracing: Add 'hist' trigger Documentation Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 24/28] tracing: Add support for multiple hist triggers per event Tom Zanussi
2015-11-03 0:34 ` Namhyung Kim
2015-11-04 1:52 ` Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 25/28] tracing: Add support for named triggers Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 26/28] tracing: Add support for named hist triggers Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 27/28] kselftests/ftrace : Add event trigger testcases Tom Zanussi
2015-10-22 18:14 ` [PATCH v11 28/28] kselftests/ftrace: Add hist " Tom Zanussi
2015-10-22 18:21 ` [PATCH 00/28] tracing: 'hist' triggers Steven Rostedt
2015-10-22 18:31 ` Tom Zanussi
2015-11-05 14:43 ` Namhyung Kim
2015-11-05 14:59 ` 平松雅巳 / HIRAMATU，MASAMI
2015-11-05 22:13 ` Tom Zanussi
2015-11-05 23:18 ` Namhyung Kim
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