From: Wolfgang Grandegger <wg@grandegger.com>
To: Robert Schwebel <r.schwebel@pengutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>, linux-rt-users@vger.kernel.org
Subject: Re: High latencies on MPC5200 with patch-2.6.24-rc5-rt1
Date: Wed, 09 Jan 2008 10:50:21 +0100 [thread overview]
Message-ID: <478498DD.8030003@grandegger.com> (raw)
In-Reply-To: <20080109090345.GG3177@pengutronix.de>
Robert Schwebel wrote:
> On Tue, Jan 08, 2008 at 04:49:47PM +0100, Robert Schwebel wrote:
>> This is on an idle system:
>
> I've quickly ported the patch stack to 2.6.24-rc5-rt1, and it doesn't
> really work:
>
> ----------8<----------
> root@phyCORE-MPC5200B-tiny:~ cyclictest -n -p80 -t1 -i10000 -l 1000
> 0.44 0.35 0.15 1/44 483
>
> T: 0 ( 483) P:80 I: 10000 C: 992 Min: -490034 Act: -410032 Avg: -243020 Max: -10
> ----------8<----------
>
> Even on an idle system I get negative values and a "running" Act value.
>
> I'll have to clean up the patch stack and check what's going on.
Are the high-res timers enabled? I also need the patch for the serial
driver posted in a previous mail.
Wolfgang.
next prev parent reply other threads:[~2008-01-09 9:50 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-08 10:13 High latencies on MPC5200 with patch-2.6.24-rc5-rt1 Wolfgang Grandegger
2008-01-08 15:49 ` Robert Schwebel
2008-01-08 16:41 ` Wolfgang Grandegger
2008-01-08 20:40 ` Robert Schwebel
2008-01-08 21:25 ` Juergen Beisert
2008-01-09 9:03 ` Robert Schwebel
2008-01-09 9:50 ` Wolfgang Grandegger [this message]
2008-01-09 14:08 ` Robert Schwebel
2008-01-09 22:51 ` Robert Schwebel
2008-01-10 0:01 ` Robert Schwebel
2008-01-10 13:17 ` Wolfgang Grandegger
2008-01-10 14:35 ` Robert Schwebel
2008-01-10 16:23 ` Robert Schwebel
2008-01-10 21:27 ` Robert Schwebel
2008-01-10 21:49 ` Wolfgang Grandegger
2008-01-10 15:48 ` Juergen Beisert
2008-01-11 9:22 ` Wolfgang Grandegger
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