Date: Tue, 19 Feb 2002 21:36:52 +0200 From: Angelin Lazarov Lalev <alalev@uni-svishtov.bg> To: freebsd-questions@FreeBSD.org Subject: Re: Modem getting sio1 interrupt-level buffer overflow msgs Message-ID: <3C72A954.6070308@uni-svishtov.bg> References: <LPBBIGIAAKKEOEJOLEGOMEJGCNAA.barbish@a1poweruser.com>
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Joe & Fhe Barbish wrote: >I have a Zoom model 2920 pci modem on sio1 and >connect to my ISP with user ppp. >I keep getting this message on the FBSD console >'30 more sio1 interrupt-level buffer overflows' >when installing ports that have to download tar files. >I also get this message when I use 'tip or cu' command >to issue ATI11 to the modem to display the last >connection values. > >Any ideas of what is causing this or what to try to make it go away? > > > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-questions" in the body of the message > > I've got the same problem with one of the dialup servers I had. In my case, I'm almost sure what was the reason: Apparently this message appears when too much data is received at a time and the processor cannot handle it fast enough. More precisely: the COM ports have some kind of FIFO queue. If the processor cannot fetch the data from there fast enough, the queue gets full. Then some data is lost. It's not dangerous, because ppp will detect the corupted packet and it will be resend. If it's happening very often, the performance of the modem goes down I believe. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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