From: eric <ericvic@163.com>
To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Cc: huang.c.h@lynuc.cn, liu.h.f@lynuc.cn,
"xenomai@xenomai.org" <xenomai@xenomai.org>
Subject: Re: [Xenomai] imx6q xenomai ipipe-3.0-imx6q
Date: Sun, 20 Apr 2014 13:06:01 +0800 (CST) [thread overview]
Message-ID: <59ece04.26b88.1457d86db18.Coremail.ericvic@163.com> (raw)
In-Reply-To: <535110C3.40500@xenomai.org>
So if my program use lots of memory operations for a long time it maybe gives non real-time activities opportunity to thrash the cache?
--
发自我的网易邮箱平板适配版
<br/><br/><br/>
----- Original Message -----
From: "Gilles Chanteperdrix" <gilles.chanteperdrix@xenomai.org>
To: "嵌入式工程师" <ericvic@163.com>
Cc: "xenomai@xenomai.org" <xenomai@xenomai.org>, liu.h.f@lynuc.cn, huang.c.h@lynuc.cn
Sent: Fri, 18 Apr 2014 13:47:15 +0200
Subject: Re: imx6q xenomai ipipe-3.0-imx6q
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.
next prev parent reply other threads:[~2014-04-20 5:06 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-18 10:28 [Xenomai] imx6q xenomai ipipe-3.0-imx6q 嵌入式工程师
2014-04-18 11:47 ` Gilles Chanteperdrix
2014-04-20 5:06 ` eric [this message]
2014-04-20 9:03 ` Gilles Chanteperdrix
2014-04-20 9:23 ` Gilles Chanteperdrix
2014-04-20 10:46 ` eric
2014-04-23 4:40 ` eric
2014-04-23 12:24 ` Gilles Chanteperdrix
-- strict thread matches above, loose matches on Subject: below --
2014-04-17 8:13 嵌入式工程师
2014-04-17 7:58 嵌入式工程师
2014-04-17 7:43 嵌入式工程师
2014-04-17 11:42 ` Gilles Chanteperdrix
2014-04-01 2:35 嵌入式工程师
2014-04-01 10:49 ` Gilles Chanteperdrix
2014-04-02 0:53 ` 嵌入式工程师
2014-04-02 7:28 ` Gilles Chanteperdrix
2014-04-03 10:25 ` 嵌入式工程师
2014-03-26 11:36 嵌入式工程师
2014-03-26 11:50 ` Gilles Chanteperdrix
2014-03-26 13:31 ` 嵌入式工程师
2014-03-26 13:34 ` Gilles Chanteperdrix
2014-03-26 14:29 ` 嵌入式工程师
2014-03-26 23:09 ` Gilles Chanteperdrix
2014-03-27 1:41 ` 嵌入式工程师
2014-03-27 5:24 ` 嵌入式工程师
2014-03-27 12:27 ` Gilles Chanteperdrix
2014-03-28 5:02 ` 嵌入式工程师
2014-03-28 17:35 ` Gilles Chanteperdrix
2014-03-29 5:54 ` 嵌入式工程师
2014-03-28 8:19 ` 嵌入式工程师
2014-03-28 17:37 ` Gilles Chanteperdrix
2014-03-28 9:08 ` 嵌入式工程师
2014-03-28 17:38 ` Gilles Chanteperdrix
2014-03-29 6:21 ` 嵌入式工程师
2014-03-29 13:51 ` Gilles Chanteperdrix
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=59ece04.26b88.1457d86db18.Coremail.ericvic@163.com \
--to=ericvic@163.com \
--cc=gilles.chanteperdrix@xenomai.org \
--cc=huang.c.h@lynuc.cn \
--cc=liu.h.f@lynuc.cn \
--cc=xenomai@xenomai.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.