From: Tom Zanussi <zanussi@kernel.org>
To: Masami Hiramatsu <mhiramat@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: Tue, 27 Nov 2018 16:53:45 -0600 [thread overview]
Message-ID: <1543359225.4223.5.camel@kernel.org> (raw)
In-Reply-To: <20181126220332.215b461779d1d57f37b46e20@kernel.org>
Hi Masami,
On Mon, 2018-11-26 at 22:03 +0900, Masami Hiramatsu wrote:
> On Wed, 14 Nov 2018 14:18:06 -0600
> Tom Zanussi <zanussi@kernel.org> wrote:
>
> > From: Tom Zanussi <tom.zanussi@linux.intel.com>
> >
> > Add a test case verifying the basic functionality of the
> > hist:snapshot() action.
> >
> > Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
> > ---
> > .../inter-event/trigger-snapshot-action-hist.tc | 43
> > ++++++++++++++++++++++
> > 1 file changed, 43 insertions(+)
> > create mode 100644
> > tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-
> > snapshot-action-hist.tc
> >
> > diff --git a/tools/testing/selftests/ftrace/test.d/trigger/inter-
> > event/trigger-snapshot-action-hist.tc
> > b/tools/testing/selftests/ftrace/test.d/trigger/inter-
> > event/trigger-snapshot-action-hist.tc
> > new file mode 100644
> > index 000000000000..a0a51e6a6a0c
> > --- /dev/null
> > +++ b/tools/testing/selftests/ftrace/test.d/trigger/inter-
> > event/trigger-snapshot-action-hist.tc
> > @@ -0,0 +1,43 @@
> > +#!/bin/sh
> > +# SPDX-License-Identifier: GPL-2.0
> > +# description: event trigger - test inter-event histogram trigger
> > snapshot action
> > +
> > +fail() { #msg
> > + echo $1
> > + exit_fail
> > +}
> > +
> > +if [ ! -f set_event ]; then
> > + echo "event tracing is not supported"
> > + exit_unsupported
> > +fi
> > +
> > +if [ ! -f snapshot ]; then
> > + echo "snapshot is not supported"
> > + exit_unsupported
> > +fi
> > +
> > +grep -q "onchange(var)" README > /dev/null || exit_unsupported #
> > version issue
> > +
> > +grep -q "snapshot()" README > /dev/null || exit_unsupported #
> > version issue
>
> "grep -q ... > /dev/null" is redundant, since -q doesn't show
> anything.
> please drop "> /dev/null" redirection.
>
> > +
> > +echo "Test snapshot action"
> > +
> > +echo 1 > /sys/kernel/debug/tracing/events/sched/enable
> > +
> > +echo
> > 'hist:keys=comm:newprio=prio:onchange($newprio).save(comm,prio):onc
> > hange($newprio).snapshot() if comm=="ping"' >>
> > /sys/kernel/debug/tracing/events/sched/sched_waking/trigger
>
> This tests onchange().snapshot(), but document change only describes
> onmax().snapshot().
> Maybe we should improve document too.
>
Yes, good point, will do.
> > +
> > +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.
Thanks,
Tom
next prev parent reply other threads:[~2018-11-27 22:53 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 [this message]
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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