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From: Richard Cochran <richardcochran@gmail.com>
To: Wolfgang Grandegger <wg@grandegger.com>
Cc: "Xenomai@xenomai.org" <Xenomai@xenomai.org>
Subject: Re: [Xenomai] Xenomai installation on P1020RDB
Date: Mon, 23 Jul 2012 10:48:17 +0200	[thread overview]
Message-ID: <20120723084817.GA30335@localhost.localdomain> (raw)
In-Reply-To: <5009A292.4060508@grandegger.com>

On Fri, Jul 20, 2012 at 08:25:22PM +0200, Wolfgang Grandegger wrote:
> 
> I tested Xenomai recently on a P2020 with mainline Linux 3.2.x with the
> new iPipe-Patch and got very good latency results, especially with CPU
> isolation: 65 us without and *8* us with CPU isolation. [I'm still puzzled
> about the good results with CPU isolation. Maybe that's due to the new
> iPipe-Patch. Need to re-test when time permits). I have listed the results
> below.

Almost a year ago, around Linux 2.6.38 or so, I measured 13 us maximum
latency on the P2020 RBD when using CPU isolation.

Thanks,
Richard


  reply	other threads:[~2012-07-23  8:48 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-20 14:31 [Xenomai] Xenomai installation on P1020RDB Lukasz Zemla
2012-07-20 18:25 ` Wolfgang Grandegger
2012-07-23  8:48   ` Richard Cochran [this message]
2012-07-23 12:01     ` Wolfgang Grandegger
2012-07-25 16:18   ` Lukasz Zemla
2012-07-25 17:11     ` Gilles Chanteperdrix
2012-07-25 17:36       ` Gilles Chanteperdrix
2012-07-25 20:15         ` Lukasz Zemla
2012-07-25 20:42           ` Gilles Chanteperdrix
2012-07-26 11:20             ` Lukasz Zemla
2012-07-26 12:00               ` Gilles Chanteperdrix
2012-07-27 15:53                 ` Lukasz Zemla
2012-07-27 16:00                   ` Gilles Chanteperdrix
2012-07-27 16:08                     ` Philippe Gerum
2012-07-27 16:12                       ` Lukasz Zemla
2012-07-27 16:19                         ` Philippe Gerum
2012-07-29 14:30                           ` Philippe Gerum
2012-07-29 14:10         ` Philippe Gerum
2012-07-25 19:26     ` Wolfgang Grandegger
2012-07-25 20:26       ` Lukasz Zemla
2012-07-25 20:55         ` Wolfgang Grandegger

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