linux-kernel - Re: [PATCH v8 12/22] tracing: Add hist trigger onchange() handler test case

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Message-Id: <20181215011810.61e1009d133fc1f999534d72@kernel.org>
Date:   Sat, 15 Dec 2018 01:18:10 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Tom Zanussi <zanussi@...nel.org>
Cc:     rostedt@...dmis.org, tglx@...utronix.de, mhiramat@...nel.org,
        namhyung@...nel.org, vedang.patel@...el.com, bigeasy@...utronix.de,
        joel@...lfernandes.org, mathieu.desnoyers@...icios.com,
        julia@...com, linux-kernel@...r.kernel.org,
        linux-rt-users@...r.kernel.org
Subject: Re: [PATCH v8 12/22] tracing: Add hist trigger onchange() handler
 test case

On Mon, 10 Dec 2018 18:01:26 -0600
Tom Zanussi <zanussi@...nel.org> wrote:

> From: Tom Zanussi <tom.zanussi@...ux.intel.com>
> 
> Add a test case verifying the basic functionality of the
> hist:onchange($var) handler.

This looks good to me.

Acked-by: Masami Hiramatsu <mhiramat@...nel.org>

BTW, could you sort these test patches at the end of this series?
(or at least after 2 features? since both depends on new onchange(var) feature)

Thank you,

> 
> Signed-off-by: Tom Zanussi <tom.zanussi@...ux.intel.com>
> ---
>  .../inter-event/trigger-onchange-action-hist.tc    | 28 ++++++++++++++++++++++
>  1 file changed, 28 insertions(+)
>  create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-onchange-action-hist.tc
> 
> diff --git a/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-onchange-action-hist.tc b/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-onchange-action-hist.tc
> new file mode 100644
> index 000000000000..064a284e4e75
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-onchange-action-hist.tc
> @@ -0,0 +1,28 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# description: event trigger - test inter-event histogram trigger onchange action
> +
> +fail() { #msg
> +    echo $1
> +    exit_fail
> +}
> +
> +if [ ! -f set_event ]; then
> +    echo "event tracing is not supported"
> +    exit_unsupported
> +fi
> +
> +grep -q "onchange(var)" README || exit_unsupported # version issue
> +
> +echo "Test onchange action"
> +
> +echo 'hist:keys=comm:newprio=prio:onchange($newprio).save(comm,prio) if comm=="ping"' >> /sys/kernel/debug/tracing/events/sched/sched_waking/trigger
> +
> +ping $LOCALHOST -c 3
> +nice -n 1 ping $LOCALHOST -c 3
> +
> +if ! grep -q "changed:" events/sched/sched_waking/hist; then
> +    fail "Failed to create onchange action inter-event histogram"
> +fi
> +
> +exit 0
> -- 
> 2.14.1
> 


-- 
Masami Hiramatsu <mhiramat@...nel.org>