From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4F940F6E.6000505@domain.hid> Date: Sun, 22 Apr 2012 16:02:22 +0200 From: Gilles Chanteperdrix MIME-Version: 1.0 References: <4F931496.1060607@domain.hid> <4F93CAF4.9050105@domain.hid> <4F93EA6D.5050208@domain.hid> <4F93ECCF.5020108@domain.hid> <4F940D6C.70108@domain.hid> In-Reply-To: <4F940D6C.70108@domain.hid> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai-help] linux 2.6.11 List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Wolfgang Grandegger Cc: xenomai@xenomai.org 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.