From: Philippe Gerum <rpm@xenomai.org>
To: roderik.wildenburg@domain.hid
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] Xenomai 2.5.6 with PPC-Kernel 2.4.25
Date: Sun, 03 Jul 2011 17:48:26 +0200 [thread overview]
Message-ID: <1309708106.2127.0.camel@domain.hid> (raw)
In-Reply-To: <1308652557.2125.45.camel@domain.hid>
On Tue, 2011-06-21 at 12:35 +0200, Philippe Gerum wrote:
> On Tue, 2011-06-21 at 12:04 +0200, roderik.wildenburg@domain.hid
> wrote:
> > I confirm that switchtest runs (nearly) perfectly on PPC-Kernel 2.6.34 with Xenomai 2.5.6. The only anomaly I could see is a "collapse" of the number of context switches exactly every 7 seconds by 2% (see below). Is this worth to pay attention to? (No other Xenomai-Task is running except for a watchdog task with a period of 500ms)
>
> 2% off seems a lot for a transient load, and this would not happen on a
> periodic basis anyway. This needs to be investigated. Could you run
> switchtest in nofpu mode?
>
> >
> > On the opposite, switchtest runs erratic on PPC-2.4.25 with Xenomai 2.5.6 as you already mentioned: The number of context switches is much smaller then (only about 2%) with PPC-2.6.34 and fluctuate very much (see below).
> > Do you think you will find some spare time to fix this Problem?
> >
>
> Spare time has become a luxury over the last months. I'll try to find a
> time slot next week to have a look at this again.
This should help, no I-pipe update needed.
http://git.xenomai.org/?p=xenomai-rpm.git;a=commit;h=35e9df567e19410526089e24fbbaf92c47de9c43
--
Philippe.
next prev parent reply other threads:[~2011-07-03 15:48 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-14 8:52 [Xenomai-help] Xenomai 2.5.6 with PPC-Kernel 2.4.25 roderik.wildenburg
2011-06-14 9:39 ` Philippe Gerum
2011-06-14 12:47 ` roderik.wildenburg
2011-06-18 8:50 ` Philippe Gerum
2011-06-18 13:44 ` Gilles Chanteperdrix
2011-06-18 14:21 ` Philippe Gerum
2011-06-21 10:04 ` roderik.wildenburg
2011-06-21 10:35 ` Philippe Gerum
2011-06-21 11:22 ` roderik.wildenburg
2011-06-21 11:33 ` Gilles Chanteperdrix
2011-06-21 13:05 ` roderik.wildenburg
2011-06-21 13:15 ` Philippe Gerum
2011-06-21 13:51 ` roderik.wildenburg
2011-06-21 14:05 ` Gilles Chanteperdrix
2011-06-21 14:35 ` Philippe Gerum
2011-07-03 15:48 ` Philippe Gerum [this message]
2011-07-04 9:43 ` roderik.wildenburg
2011-06-18 14:35 ` Philippe Gerum
2011-06-18 14:44 ` Philippe Gerum
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