From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Wolfgang Grandegger <wg@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] linux 2.6.11
Date: Sun, 22 Apr 2012 16:02:22 +0200 [thread overview]
Message-ID: <4F940F6E.6000505@domain.hid> (raw)
In-Reply-To: <4F940D6C.70108@domain.hid>
On 04/22/2012 03:53 PM, Wolfgang Grandegger wrote:
> On 04/22/2012 01:34 PM, Gilles Chanteperdrix wrote:
>> On 04/22/2012 01:24 PM, Gilles Chanteperdrix wrote:
>>> On 04/22/2012 11:10 AM, Wolfgang Grandegger wrote:
>>>> But all this does not explain a factor of 3 with your driver. I doubt
>>>> that it's due to a move from 2.6.29 -> 2.6.32. Try using ftrace to find
>>>> out what's going on (if it's already available).
>>>
>>> Threaded interrupts were introduced around this time. And threaded
>>> interrupts DO have a significant impact on latencies.
>
> Yes, but thread interrupts are normally not enabled/used by default. I'm
> not speaking about CONFIG_PREEMPT_RT. Well, do we speak about latencies?
> He just said "reading an ADC on an EP9312 ARM board has slowed by a
> factor of three". I'm not even sure if it's related to Xenomai at all.
> xenophile (&$#^?) , could you please be more precise.
Yes, without answers to these questions, xenophile's post looks a lot
like a troll attempt.
--
Gilles.
prev parent reply other threads:[~2012-04-22 14:02 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.0.1334997334.18156.xenomai@xenomai.org>
2012-04-21 20:12 ` [Xenomai-help] linux 2.6.11 xenophile
2012-04-21 21:03 ` Gilles Chanteperdrix
2012-04-22 6:23 ` xenophile
2012-04-22 11:22 ` Gilles Chanteperdrix
2012-04-22 9:10 ` Wolfgang Grandegger
2012-04-22 11:24 ` Gilles Chanteperdrix
2012-04-22 11:34 ` Gilles Chanteperdrix
2012-04-22 13:53 ` Wolfgang Grandegger
2012-04-22 14:02 ` Gilles Chanteperdrix [this message]
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