linux-kernel - Re: [PATCH] ftracetest: Replace usleep with sleep 0.000001

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Date:	Sat, 20 Dec 2014 21:42:13 +0100
From:	Pavel Machek <pavel@....cz>
To:	Michael Ellerman <mpe@...erman.id.au>
Cc:	rostedt@...dmis.org, namhyung@...nel.org,
	masami.hiramatsu.pt@...achi.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ftracetest: Replace usleep with sleep 0.000001

On Wed 2014-12-10 15:38:27, Michael Ellerman wrote:
> usleep is a Fedoraism, it's not generally available on Debian based
> systems AFAICS.
> 
> GNU sleep accepts a floating point argument, so use that instead.
> 
> Signed-off-by: Michael Ellerman <mpe@...erman.id.au>

Could ftrace user interface be enhanced not to need random delays?

								Pavel

> ---
>  tools/testing/selftests/ftrace/test.d/event/event-enable.tc     | 6 +++---
>  tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc | 6 +++---
>  2 files changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/tools/testing/selftests/ftrace/test.d/event/event-enable.tc b/tools/testing/selftests/ftrace/test.d/event/event-enable.tc
> index 668616d9bb03..c5343add3407 100644
> --- a/tools/testing/selftests/ftrace/test.d/event/event-enable.tc
> +++ b/tools/testing/selftests/ftrace/test.d/event/event-enable.tc
> @@ -21,7 +21,7 @@ reset_tracer
>  do_reset
>  
>  echo 'sched:sched_switch' > set_event
> -usleep 1
> +sleep 0.000001
>  
>  count=`cat trace | grep sched_switch | wc -l`
>  if [ $count -eq 0 ]; then
> @@ -31,7 +31,7 @@ fi
>  do_reset
>  
>  echo 1 > events/sched/sched_switch/enable
> -usleep 1
> +sleep 0.000001
>  
>  count=`cat trace | grep sched_switch | wc -l`
>  if [ $count -eq 0 ]; then
> @@ -41,7 +41,7 @@ fi
>  do_reset
>  
>  echo 0 > events/sched/sched_switch/enable
> -usleep 1
> +sleep 0.000001
>  
>  count=`cat trace | grep sched_switch | wc -l`
>  if [ $count -ne 0 ]; then
> diff --git a/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc b/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc
> index 655c415b6e7f..84a2020d4e7b 100644
> --- a/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc
> +++ b/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc
> @@ -21,7 +21,7 @@ reset_tracer
>  do_reset
>  
>  echo 'sched:*' > set_event
> -usleep 1
> +sleep 0.000001
>  
>  count=`cat trace | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l`
>  if [ $count -lt 3 ]; then
> @@ -31,7 +31,7 @@ fi
>  do_reset
>  
>  echo 1 > events/sched/enable
> -usleep 1
> +sleep 0.000001
>  
>  count=`cat trace | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l`
>  if [ $count -lt 3 ]; then
> @@ -41,7 +41,7 @@ fi
>  do_reset
>  
>  echo 0 > events/sched/enable
> -usleep 1
> +sleep 0.000001
>  
>  count=`cat trace | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l`
>  if [ $count -ne 0 ]; then

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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