From: Robert Schwebel <r.schwebel@pengutronix.de>
To: Junior <ejr@inbox.com>
Cc: linux-rt-users@vger.kernel.org
Subject: Re: RT example
Date: Thu, 25 Jan 2007 08:01:33 +0100 [thread overview]
Message-ID: <20070125070133.GY28808@pengutronix.de> (raw)
In-Reply-To: <DBDBE3A7EF0.0000058Dejr@inbox.com>
On Wed, Jan 24, 2007 at 10:58:41AM -0800, Junior wrote:
> Does anyone have example code using the PREEMPT_RT patch?
You could for example start with cyclictest. It is also a good example
for how to write cyclic realtime programs on Linux.
> I've installed the patch for 2.6.18 and notice I'm actually runiing
> slower that without the patch. I'm pretty sure it's something I'm
> doing or not doing and an example or some other docs should be enough
> to get me started.
Note that realtime is not about running fast, but running "in time".
That may often mean that the overall system performance goes down.
> PS. I'm using an ARM9 platform
Do you have clocksource/clockevent support for your ARM9 chip?
Robert
--
Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de
Pengutronix - Linux Solutions for Science and Industry
Handelsregister: Amtsgericht Hildesheim, HRA 2686
Hannoversche Str. 2, 31134 Hildesheim, Germany
Phone: +49-5121-206917-0 | Fax: +49-5121-206917-9
next prev parent reply other threads:[~2007-01-25 7:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-24 18:58 RT example Junior
2007-01-25 7:01 ` Robert Schwebel [this message]
2007-01-25 14:30 ` Junior
2007-01-25 15:11 ` Junior
2007-01-27 19:34 ` Junior
2007-02-02 15:37 ` Junior
[not found] <dbdbe3a7ef0.0000058dejr@inbox.com>
[not found] ` <20070125070133.gy28808@pengutronix.de>
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=20070125070133.GY28808@pengutronix.de \
--to=r.schwebel@pengutronix.de \
--cc=ejr@inbox.com \
--cc=linux-rt-users@vger.kernel.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).