From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <49EF7088.6070006@domain.hid> Date: Wed, 22 Apr 2009 21:31:20 +0200 From: Gilles Chanteperdrix MIME-Version: 1.0 References: <49EF6591.7000802@domain.hid> <468CF57C-40DE-498B-9C2C-C73AE07CFE4F@comcast.net> In-Reply-To: <468CF57C-40DE-498B-9C2C-C73AE07CFE4F@comcast.net> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai-help] An answer to Steven's questions. List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Steven Seeger Cc: Xenomai help Steven Seeger wrote: > The problem is that latency on Xenomai (even with kernel based > threads) is terrible on our board compared to RTAI and it's causing us > issues. I'm starting to think that Xenomai on Geode is not appropriate > for our application, but we have to salvage the work that's already > been done. At this point I'm simply looking to minimize the problem. > > We are seeing jitters of upwards of 70us when we have a 125us and a > 500us task. That's a huge amount and we can't deal with it. Hopefully > the problem will be something else. It would be nice to have my other > questions answered, though. You are repeating yourself, so, I am going to repeat myself. Just run the latency test, if it does not have the same latency, then your problem is in your application. It it has the same latency, then there is a problem with Xenomai, and you should enable the I-pipe tracer and send us the trace. -- Gilles.