From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Franz Engel <franz_lambert_engel@yahoo.de>
Cc: 'Jan Kiszka' <jan.kiszka@siemens.com>, xenomai@xenomai.org
Subject: Re: [Xenomai] High latency and smi with intel vendor chip
Date: Thu, 27 Jun 2013 20:51:06 +0200 [thread overview]
Message-ID: <51CC899A.60407@xenomai.org> (raw)
In-Reply-To: <003701ce735b$7d70dd90$785298b0$@de>
On 06/27/2013 07:26 PM, Franz Engel wrote:
> I cleared the bits (18, 17, 14, 13, 11, 6 and 3), rather, they were already
> cleared. The value of the register was 23.
Hi,
You may try to clear all bits except bits 0 and 1. Though, please run
tests, and check for overheating, in case one disabled SMI source is in
fact the fan control.
> But I have still latencies
> between 4us and 90us. Is there a best practice to find out what is the
> reason for this latencies?
First, please tell us which version of Linux you use, with which version
of the I-pipe patch. Then post your kernel configuration. For instance
if you have ACPI and/or USB disabled, you should enable them.
Regards.
--
Gilles.
next prev parent reply other threads:[~2013-06-27 18:51 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.1.1371808801.4609.xenomai@xenomai.org>
2013-06-21 13:07 ` [Xenomai] High latency and smi with intel vendor chip Franz Engel
2013-06-21 14:00 ` Jan Kiszka
2013-06-22 11:57 ` Franz Engel
2013-06-24 6:40 ` Jan Kiszka
2013-06-24 7:20 ` Jan Kiszka
2013-06-27 17:26 ` Franz Engel
2013-06-27 18:51 ` Gilles Chanteperdrix [this message]
2013-06-27 18:35 ` Gilles Chanteperdrix
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