From: Ingo Molnar <mingo@elte.hu>
To: Manfred Gruber <m.gruber@tirol.com>
Cc: linux-rt-users@vger.kernel.org
Subject: Re: poison_obj latency
Date: Wed, 27 Jun 2007 14:34:35 +0200 [thread overview]
Message-ID: <20070627123435.GA24977@elte.hu> (raw)
In-Reply-To: <200706271251.58092.m.gruber@tirol.com>
* Manfred Gruber <m.gruber@tirol.com> wrote:
> hi !
>
> I use a arm4vt ep93xx processor with 2.6.21.5-rt18.
> When i run cyclictest with -i 10000 and -n -p 90 -b 1000 i see some strange
> latencies in poison_obj.
disable SLAB_DEBUG. And look into your 'dmesg' output, the -rt kernel
will warn about any other kernel config options as well that are known
to cause large latencies:
VFS: Mounted root (ext3 filesystem) readonly.
*****************************************************************************
* *
* REMINDER, the following debugging option is turned on in your .config: *
* *
* CONFIG_SLAB *
* *
* it may increase runtime overhead and latencies. *
* *
*****************************************************************************
Freeing unused kernel memory: 324k freed
Ingo
next prev parent reply other threads:[~2007-06-27 12:34 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-27 10:51 poison_obj latency Manfred Gruber
2007-06-27 12:34 ` Ingo Molnar [this message]
2007-06-27 13:24 ` Manfred Gruber
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