From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Tue, 8 Dec 2015 12:23:20 +0100
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Message-ID: <20151208112320.GA24418@hermes.click-hack.org>
References: <44cb82ce.15337.151812ff429.Coremail.ericvic@163.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <44cb82ce.15337.151812ff429.Coremail.ericvic@163.com>
Subject: Re: [Xenomai] ipipe-gch-ipipe-3.0-imx6q latency
List-Id: Discussions about the Xenomai project <xenomai.xenomai.org>
List-Unsubscribe: <http://xenomai.org/mailman/options/xenomai>,
 <mailto:xenomai-request@xenomai.org?subject=unsubscribe>
List-Archive: <http://xenomai.org/pipermail/xenomai/>
List-Post: <mailto:xenomai@xenomai.org>
List-Help: <mailto:xenomai-request@xenomai.org?subject=help>
List-Subscribe: <http://xenomai.org/mailman/listinfo/xenomai>,
 <mailto:xenomai-request@xenomai.org?subject=subscribe>
To: eric <ericvic@163.com>
Cc: "xenomai@xenomai.org" <xenomai@xenomai.org>

On Tue, Dec 08, 2015 at 06:43:02PM +0800, eric wrote:
> hello:
> I use xenomai-2.6.4 with kernel
>         ipipe-gch-ipipe-3.0-imx6q.tar.bz2 with sample test , build
>         the flow module with timer 250us cycle,if I make a user
>         space application with memory copy ,the kernel latency
>         will very big ,why??? thanks

Do you have the same problem if you use a recent mainline kernel?
Such as 3.14 or 3.18 ?

-- 
					    Gilles.
https://click-hack.org