From: Robert Schwebel <r.schwebel@pengutronix.de>
To: Wolfgang Grandegger <wg@grandegger.com>
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, 9 Jan 2008 23:51:07 +0100 [thread overview]
Message-ID: <20080109225107.GV3177@pengutronix.de> (raw)
In-Reply-To: <20080109090345.GG3177@pengutronix.de>
On Wed, Jan 09, 2008 at 10:03:45AM +0100, Robert Schwebel wrote:
> ----------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<----------
Mainline without -rt doesn't show the effect; I narrowed it down by
disabling patches, starting from the end of the series. Unfortunately,
not all patches can be disabled without breaking the build.
The latencies look normal when I disable these two patches:
rt-time-starvation-fix.patch
rt-time-starvation-fix-update.patch
Throwing in the versions from 2.6.23.3-rt5 doesn't help, the effect
stays the same. So I assume it is a side effect.
Robert
--
Robert Schwebel | http://www.pengutronix.de
OSADL Testlab @ Pengutronix | http://www.osadl.org
next prev parent reply other threads:[~2008-01-09 22:51 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
2008-01-09 14:08 ` Robert Schwebel
2008-01-09 22:51 ` Robert Schwebel [this message]
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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