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 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.