From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Adrien LECOINTRE <adrien20@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] How to chose between xenomai and preempt RT
Date: Wed, 03 Jun 2009 14:16:42 +0200 [thread overview]
Message-ID: <4A2669AA.60600@domain.hid> (raw)
In-Reply-To: <103585745.148571244020625685.JavaMail.root@domain.hid>
Adrien LECOINTRE wrote:
> I read a lot of things about PREEMPT_RT not providing hard real-time
> but I coudn't find any test case which shows that. My loads are
> probably not good enough but it shouldn't be so difficult to find a
> way to cause a significant latency on a supposed non-hard-real-time
> OS.
I can not leave this unanswered. This is a question of code coverage.
Only when you have tested most of the code paths in the Linux kernel can
you state that you have made a proper test. The only way to do this
found so far (by the preempt_rt people, I believe) is to run LTP, the
Linux Testing Project. And even though you do not test all the drivers
in your system (except the most current ones such as ethernet and ATA).
--
Gilles.
next prev parent reply other threads:[~2009-06-03 12:16 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <2060886493.147971244020544226.JavaMail.root@domain.hid>
2009-06-03 9:17 ` [Xenomai-help] How to chose between xenomai and preempt RT Adrien LECOINTRE
2009-06-03 9:34 ` Gilles Chanteperdrix
2009-06-03 9:44 ` Gilles Chanteperdrix
2009-06-03 12:16 ` Gilles Chanteperdrix [this message]
2009-06-01 22:14 Adrien LECOINTRE
2009-06-02 19:43 ` Jeff Angielski
2009-06-02 20:05 ` Gilles Chanteperdrix
2009-06-03 13:36 ` Jeff Angielski
2009-06-03 14:30 ` Gilles Chanteperdrix
2009-06-02 20:15 ` Jan Kiszka
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=4A2669AA.60600@domain.hid \
--to=gilles.chanteperdrix@xenomai.org \
--cc=adrien20@domain.hid \
--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.