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From: Masami Hiramatsu <mhiramat@kernel.org>
To: Tom Zanussi <zanussi@kernel.org>
Cc: rostedt@goodmis.org, tglx@linutronix.de, 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: Re: [PATCH v7 09/16] tracing: Add hist trigger snapshot() action test case
Date: Wed, 28 Nov 2018 11:15:58 +0900	[thread overview]
Message-ID: <20181128111558.5869fa4be7104314e833a801@kernel.org> (raw)
In-Reply-To: <1543359225.4223.5.camel@kernel.org>

Hi Tom,

On Tue, 27 Nov 2018 16:53:45 -0600
Tom Zanussi <zanussi@kernel.org> wrote:

> > > +ping $LOCALHOST -c 3
> > > +nice -n 1 ping $LOCALHOST -c 3
> > > +
> > > +echo 0 > /sys/kernel/debug/tracing/events/sched/enable
> > 
> > Shouldn't we stop tracing instead of disabling the event?
> > 
> 
> This is just reversing the enable, so should be fine, but I can stop
> tracing instead if you prefer.

Oops, maybe we have to check the difference between event enabling and
trace enabling.
echo 0 > tracing_on will stop writing ring buffer, but event may continue
to be called. Does this mean hist will be updated? (and I guess preferrable
behavior is to stop hist too, isn't it?)

Thank you,


-- 
Masami Hiramatsu <mhiramat@kernel.org>

  reply	other threads:[~2018-11-28  2:16 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 ` [PATCH v7 03/16] tracing: Add hist trigger handler.action documentation to README Tom Zanussi
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 [this message]
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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