From: edward.robbins@domain.hid
To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] Very high latencies under stress testing
Date: Tue, 19 Oct 2010 14:52:04 +0100 (BST) [thread overview]
Message-ID: <1287496324.10921156@domain.hid> (raw)
In-Reply-To: <4CB85C64.9040307@domain.hid>
Having disabled MTRR (and leaving in Phillipes patch) I am not getting unreasonable latencies unless I enable graphics acceleration. Can I be sure this has solved the issue?
Edward
On Friday, 15 October, 2010 2:51pm, "Gilles Chanteperdrix" <gilles.chanteperdrix@xenomai.org> said:
> edward.robbins@domain.hid wrote:
>> I am also finding that tasks are frequently hanging, causing
>> ipipetraces with "INFO: task xxx:xxx blocked for more than 120
>> seconds". Ihave just had this with apt-get update, and was previously
>> getting itwith grub-install. Could this be related?
>
> Yes. There is obviously an issue in your patched kernel, we need to find
> this first before we draw any conclusion from any other behaviour.
>
> From the trace you sent, it looks like it happens in the MTRR code, but
> it could also be an SMI, or some other bug. For debugging purposes,
> could you try disabling MTRRs in the kernel configuration?
>
> --
> Gilles.
>
next prev parent reply other threads:[~2010-10-19 13:52 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-13 14:17 [Xenomai-help] Very high latencies under stress testing edward.robbins
2010-08-13 14:35 ` Gilles Chanteperdrix
2010-08-16 12:13 ` edward.robbins
2010-08-16 12:32 ` Gilles Chanteperdrix
2010-09-03 16:30 ` edward.robbins
2010-09-04 8:51 ` Philippe Gerum
2010-10-15 9:21 ` edward.robbins
2010-10-15 11:54 ` edward.robbins
2010-10-15 13:51 ` Gilles Chanteperdrix
2010-10-15 14:13 ` edward.robbins
2010-10-15 14:25 ` Gilles Chanteperdrix
2010-10-15 14:33 ` Philippe Gerum
2010-10-19 13:52 ` edward.robbins [this message]
2010-10-19 20:01 ` Gilles Chanteperdrix
2010-10-23 11:08 ` edward.robbins
2010-10-23 11:13 ` Gilles Chanteperdrix
2010-10-23 11:22 ` edward.robbins
2010-10-23 11:36 ` Gilles Chanteperdrix
2010-10-23 13:45 ` edward.robbins
2010-10-23 13:51 ` Gilles Chanteperdrix
2010-10-23 13:56 ` edward.robbins
2010-10-23 13:58 ` Gilles Chanteperdrix
2010-10-23 14:32 ` edward.robbins
2010-10-23 14:37 ` Gilles Chanteperdrix
2010-10-23 14:48 ` edward.robbins
2010-10-23 15:16 ` edward.robbins
2010-10-23 14:10 ` Gilles Chanteperdrix
2010-08-13 14:40 ` Philippe Gerum
2010-08-13 16:15 ` Philippe Gerum
-- strict thread matches above, loose matches on Subject: below --
2010-10-23 14:54 edward.robbins
2010-10-23 15:37 ` Gilles Chanteperdrix
2010-10-23 16:21 ` edward.robbins
2010-10-23 16:26 ` edward.robbins
2010-10-23 18:46 ` edward.robbins
2010-10-23 21:52 ` Gilles Chanteperdrix
2010-10-24 15:55 ` edward.robbins
2010-10-23 16:13 ` Gilles Chanteperdrix
2010-10-23 16:22 ` Gilles Chanteperdrix
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