From: Wolfgang Grandegger <wg@grandegger.com>
To: Mohamed HAMZAOUI <requinham@gmail.com>
Cc: Alexander Stein <alexander.stein@systec-electronic.com>,
Kurt Van Dijck <kurt.van.dijck@eia.be>,
Pavel Pisa <pisa@cmp.felk.cvut.cz>,
Linux-CAN <linux-can@vger.kernel.org>
Subject: Re: [SocketCan] Problem of accuracy
Date: Thu, 12 Jul 2012 00:22:40 +0200 [thread overview]
Message-ID: <4FFDFCB0.60109@grandegger.com> (raw)
In-Reply-To: <CABMxt4i1JN9HG-0AU60gOt-kBRir=qu2zMvhpCPsBv8xRTWn1A@mail.gmail.com>
On 07/11/2012 02:35 PM, Mohamed HAMZAOUI wrote:
> Hi,
>
> I run the test and actually i have around 1ms (my specified period) ,
Sounds better.
> the jitter is up to 24 microseonds. it's better than using only
> clock_nannosleep.
With or without load?
> I think my preblem is solved but can I minimize the gitter and why
> when i use only clock_nannosleep i have the 300 us ?
The jitter above is far to good for Linux without preempt-rt. Try with
more load and a longer run time.
Wolfgang.
next prev parent reply other threads:[~2012-07-11 22:22 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CABMxt4ijuTMYFYXx0n4AYBO6-=SRD0U3F4BTA2=rWE80Z4-yOA@mail.gmail.com>
2012-07-05 8:38 ` Problem of accuracy Oliver Hartkopp
2012-07-07 10:02 ` [SocketCan] " Mohamed HAMZAOUI
2012-07-07 10:32 ` Wolfgang Grandegger
2012-07-08 19:43 ` Mohamed HAMZAOUI
2012-07-08 20:13 ` Wolfgang Grandegger
2012-07-08 20:30 ` Mohamed HAMZAOUI
2012-07-09 7:18 ` Wolfgang Grandegger
2012-07-09 8:14 ` Mohamed HAMZAOUI
2012-07-09 8:20 ` Wolfgang Grandegger
2012-07-09 9:19 ` Mohamed HAMZAOUI
2012-07-09 9:22 ` Wolfgang Grandegger
[not found] ` <CABMxt4jnztXqAmLFcBnqp3001QXds1nX3xA2y_ka=xCNr0cjjA@mail.gmail.com>
[not found] ` <4FFAB09F.6090800@grandegger.com>
[not found] ` <CABMxt4jLRKz8xKNbH3Qa=P0k1aEjMsqmo2vArGDo2O1Wf0=wGQ@mail.gmail.com>
2012-07-09 11:26 ` Fwd: " Mohamed HAMZAOUI
2012-07-09 11:40 ` Wolfgang Grandegger
2012-07-09 11:57 ` Mohamed HAMZAOUI
2012-07-09 12:15 ` Wolfgang Grandegger
2012-07-09 13:19 ` Pavel Pisa
2012-07-09 14:29 ` Mohamed HAMZAOUI
2012-07-09 14:35 ` Mohamed HAMZAOUI
2012-07-09 14:40 ` Kurt Van Dijck
2012-07-09 14:57 ` Alexander Stein
2012-07-09 15:39 ` Mohamed HAMZAOUI
2012-07-09 17:08 ` Oliver Hartkopp
2012-07-09 20:50 ` Wolfgang Grandegger
2012-07-10 22:11 ` Mohamed HAMZAOUI
2012-07-11 12:35 ` Mohamed HAMZAOUI
2012-07-11 22:22 ` Wolfgang Grandegger [this message]
2012-07-11 22:19 ` Wolfgang Grandegger
2012-07-09 6:55 ` Kurt Van Dijck
[not found] ` <1341488146.2416.9.camel@slaptop>
2012-07-05 13:57 ` [Socketcan-users] back to back can frames Kurt Van Dijck
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=4FFDFCB0.60109@grandegger.com \
--to=wg@grandegger.com \
--cc=alexander.stein@systec-electronic.com \
--cc=kurt.van.dijck@eia.be \
--cc=linux-can@vger.kernel.org \
--cc=pisa@cmp.felk.cvut.cz \
--cc=requinham@gmail.com \
/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