From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4EDF7A34.2020701@domain.hid> Date: Wed, 07 Dec 2011 15:37:40 +0100 From: Kurt Geebelen MIME-Version: 1.0 References: <4ED8EEB1.1040904@domain.hid> <4EDE5AFA.2050503@domain.hid> In-Reply-To: <4EDE5AFA.2050503@domain.hid> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable Subject: Re: [Xenomai-help] Xenomai installation: high latencies List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gilles Chanteperdrix Cc: "xenomai@xenomai.org" Hi all, Sorry for taking so long to respond, I didn't have time to work on it.=20 SMI's didn't appear to be the problem, and I also am not using the=20 nvidia binary driver. I tried disabling USB in the BIOS, and that helped! My latencies are now=20 under 6 microseconds. Since I don't need USB (I'm using a PS/2 mouse and=20 keyboard now), I'll use it like this. Thanks for the help, Best, Kurt Op 6/12/2011 19:12, Gilles Chanteperdrix schreef: > On 12/02/2011 04:28 PM, Kurt Geebelen wrote: >> Dear all, >> >> I've tried installing Xenomai, following these instructions: >> >> http://www.xenomai.org/index.php/Building_Debian_packages >> >> but then for the latest version (xenomai 2.6.0, and kernel 2.6.38.8 an= d >> for 64 bit) . >> >> For configuring the kernel, I followed these instructions: >> >> http://www.xenomai.org/index.php/Configuring_x86_kernels >> >> All that is stated on these websites works without problems, and I am >> able to boot in the installed xenomai kernel. However, when I perform >> the latency-test (latency in /usr/lib/xenomai), I get latencies of mor= e >> than 1400 microseconds. >> >> The system I have is the following: >> >> Dell=E2=84=A2 Precision=E2=84=A2 T1500 >> One=C2=AE Intel=E2=84=A2 Core i7-860 (2.8GHz, 8MB L3, 95W, Quad Core) >> 6GB DDR3 non-ECC Memory (1333MHz, 3x2GB) >> 512MB PCIe x16 NVIDIA Quadro FX 580 Graphics Card >> Intel Solid-State Drive 320 Series 120GB >> >> I have tried reinstalling the kernel several times, but I always end u= p >> with high latencies. >> I also have consulted with others, who followed the same guidelines as= I >> did, and their latencies are about 100 times lower. >> >> Is there somebody who knows what the problem might be? Might it be a >> hardware-related problem? > It is already written in the URL you mention, but I will repeat it > nevertheless, if enabling SMI workaround, have you checked the kernel > logs to see whether the SMI workaround actually works? >