From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <459C13C5.9010007@domain.hid> Date: Wed, 03 Jan 2007 21:36:21 +0100 From: Markus Franke MIME-Version: 1.0 Subject: Re: [Xenomai-help] parallelport module for measuring external interrupt latency References: <459B6DAD.4030406@domain.hid> <459B7C6C.9030401@domain.hid> <459B8382.7060508@domain.hid> <459B8A19.2060809@domain.hid> In-Reply-To: <459B8A19.2060809@domain.hid> Content-Type: multipart/mixed; boundary="------------070704010807050905070601" Reply-To: Markus.Franke@domain.hid List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: xenomai@xenomai.org This is a multi-part message in MIME format. --------------070704010807050905070601 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Jan Kiszka wrote: > > Even if the notification is not time-critical, you first have to get out > of the Xenomai context in a sane manner. rtdm_nrtsig may help if you > don't want to use the RT scheduler for user task wakeup. OK. Thank you for the hint with rtdm_nrtsig_*. The kernel-module works now. But I have still a problem when generating interrupts with a high frequency, let's say 100us. Then I get large latencies in the range of 1,5 seconds. Can you see any reason for this. An intervall of 1ms works without any problems and the latencies reach maybe 13us in worst case. Thanks in advance, Markus Franke --------------070704010807050905070601 Content-Type: text/x-vcard; charset=utf-8; name="Markus.Franke.vcf" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="Markus.Franke.vcf" begin:vcard fn:Markus Franke n:Franke;Markus adr;quoted-printable:;;Vettersstra=C3=9Fe 64/722;Chemnitz;Saxony;09126;Germany email;internet:Markus.Franke@domain.hid x-mozilla-html:FALSE url:http://www.tu-chemnitz.de/~franm version:2.1 end:vcard --------------070704010807050905070601--