From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4A7AF4C4.30001@domain.hid> Date: Thu, 06 Aug 2009 17:20:36 +0200 From: Gilles Chanteperdrix MIME-Version: 1.0 References: <4A72BFBA.8040209@domain.hid> In-Reply-To: <4A72BFBA.8040209@domain.hid> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai-help] high latencies with Intel P45 ICH10 List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Theo Veenker Cc: Xenomai help Theo Veenker wrote: > Hi, > > I'm replacing a number of old machines in our lab by new ones with an > MSI P45 Neo3 mobo. On the new hardware I'm seeing high latencies with > Xenomai 2.4.8 on kernel 2.6.29.5. The latency thingy reports many > overruns: > RTT| 00:00:01 (periodic user-mode task, 100 us period, priority 99) > RTH|-----lat min|-----lat avg|-----lat max|-overrun|----lat best|---lat worst > RTD| 4.083| 9.100| 9.807| 0| 4.083| 9.807 > RTD| 4.137| 9.280| 1804.493| 18| 4.083| 1804.493 > RTD| 3.451| 9.099| 14.337| 18| 3.451| 1804.493 > RTD| 3.864| 9.281| 1820.762| 36| 3.451| 1820.762 > RTD| 4.017| 9.102| 9.917| 36| 3.451| 1820.762 > RTD| 4.121| 9.273| 1742.710| 53| 3.451| 1820.762 > > I've tried UP/SMP both with and without disabling SMI. No CONFIG_ACPI_PROCESSOR > etc. PCI_MSI is disabled too. I do not see the "Xenomai: SMI-enabled chipset > found..." message in the messages log file. Is that correct or is this hardware > too new for this version of Xenomai? Probably, the table of supported PCI ids is in arch/x86/smi.c -- Gilles