From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Fri, 18 Apr 2014 13:47:15 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai] imx6q xenomai ipipe-3.0-imx6q
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Cc: huang.c.h@lynuc.cn, liu.h.f@lynuc.cn, "xenomai@xenomai.org" <xenomai@xenomai.org>

On 04/18/2014 12:28 PM, 嵌入式工程师 wrote:
> 
> 
> I do the same on the imx53 with imx6 test, in the process of
> real-time task to run the same operation content, start the qt deform
> demo and copy large file  to memory, in 250 us the  latency on imx6
> board began to accumulate, lost real-time, but latency  on the imx53
> only value within 20 us. I do not run anyother rt task on my below
> test：

Looking at your code, it seems your problem (if I understand correctly),
is that a series of memcpy and memset takes a long time to execute when
non real-time activities are given an opportunity to thrash the cache.

Am I understanding correctly?

-- 
                                                                Gilles.