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

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Message-ID: <CAM9d7cgY6t7_XB+SryQft_BA0zbtcKN1ZrfQ-qONtb-SkB89Jw@mail.gmail.com>
Date:	Wed, 10 Dec 2014 17:19:36 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Michael Ellerman <mpe@...erman.id.au>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ftracetest: Replace usleep with sleep 0.000001

Hi Michael,

On Wed, Dec 10, 2014 at 1:38 PM, Michael Ellerman <mpe@...erman.id.au> 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.

I tested it on busybox not Debian, sorry.  But it seems busybox's
sleep doesn't support floating point argument..

  / # ls -l `which sleep`
  lrwxrwxrwx     1  root     rooot       7 May 22  2014  /bin/sleep -> busybox

  / # sleep 0.1
  sleep: invalid number '0.1'


Thanks,
Namhyung
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