Date: Wed, 04 Apr 2007 21:27:00 +0200 From: Rainer Hurling <rhurlin@gwdg.de> To: pyunyh@gmail.com Cc: darren780@yahoo.com, freebsd-current@freebsd.org, shigeaki@se.hiroshima-u.ac.jp Subject: Re: yongari nfe problems Message-ID: <4613FC04.1040302@gwdg.de> In-Reply-To: <20070404003215.GA11525@cdnetworks.co.kr> References: <20070313004601.GA87608@cdnetworks.co.kr> <20070313005845.GB87608@cdnetworks.co.kr> <45F636B5.9060608@gwdg.de> <20070313070153.GD87608@cdnetworks.co.kr> <20070331003031.GB68853@cdnetworks.co.kr> <460E77BE.9090503@gwdg.de> <20070402010230.GA1323@cdnetworks.co.kr> <46113CF2.6090009@gwdg.de> <20070403035845.GB7223@cdnetworks.co.kr> <461285A6.5010805@gwdg.de> <20070404003215.GA11525@cdnetworks.co.kr>
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Pyun YongHyeon schrieb: > On Tue, Apr 03, 2007 at 06:49:42PM +0200, Rainer Hurling wrote: > > [...] > > > > In "man ehci(4)" I found: > > > > ------- > > BUGS > > The driver is not finished and is quite buggy. > > There is currently no support for isochronous transfers. > > ------- > > > > Possibly this could cause the observed "dropouts" of nfe0 from a few > > seconds till several minutes? > > > > I'm not familiar with ehci(4) but I think it has nothing to do with > missing Tx completion interrupts observed on nfe(4). > > > > > Is there a knob or option in driver nfe(4) I can use to try classical > > polling or any 'lower' mode of operation? > > > > Add 'options DEVICE_POLLING' into kernel configuration file and > rebuild your kernel. Use ifconfig(8) to enable/disable polling(4) > feature. > See polling(4) for more detailed description and tuning parameters. > Thank you for this hint. I compiled my kernel with 'options DEVICE_POLLING' and reboot. For the first four hours I get no new watchdog timeouts. But then, without heavy load and without using usb devices, I get many timeouts. Obiously nfe(4) does not support this polling feature? Or we are looking at the wrong side ... Rainer
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