Date: Sun, 23 Jan 2005 16:00:32 -0800 From: "Net Virtual Mailing Lists" <mailinglists@net-virtual.com> To: =?ISO-8859-1?Q?Stefan=20E=DFer?= <se@FreeBSD.org>, <freebsd-stable@freebsd.org> Subject: Re: NIC card problems.... Message-ID: <20050124000032.8308@mail.net-virtual.com> In-Reply-To: <20050123232738.GA78226@StefanEsser.FreeBSD.org> References: <20050123232738.GA78226@StefanEsser.FreeBSD.org>
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Hello Stefan (and everyone else!), Thank you for your great comments! I think I have a 3c9xx card around here somewhere, I will give that a shot when it reboots the next time (just to see). It looks like for future systems I'll standardize on the Intel fxp-based cards, I really appreciate that advice! As for what might actually be causing this crash: I just checked the PCI configuration and don't see anything in the BIOS which would suggest that anything you mentioned is something I can modify - is that correct? Or are you saying that I am simply pushing past the limits of what this hardware (and PCI bus) is capable of? For whatever it is worth, all I have in terms of PCI cards is this NIC and VGA card (which doesn't run anything gui-like). I am using the onboard IDE controller, not sure if that is considered a "PCI card" for this purpose. There are no sound cards or anything like that installed. The motherboard has no built-in audio. I can copy all of the possible PCI settings I have in my bios setup and what they are set to, if you think that would be helpful here (I would have done it, but I just am not sure if you are hinting at the possibility there may be something wrong with the BIOS configuration here)? I will say that what you are describing could very well be the case, I've got two disks (one on each of the two built-in controllers) running pretty hot-and-heavy during most of this too. - Greg >A master latency timer value of 32 (0x20) should keep the bus-master >switch overhead down to 20% (i.e. 80% left for data transfers) and >should keep the latency in the range of 1 microsecond per bus-master >(i.e. 5 microseconds if there are 2 Ethernet cards, 2 disk controllers >and one host bridge active at the same time). In that case, each PCI >device could expect to transfer 100 bytes every 5 microseconds. A >buffer of 128 bytes ought to suffice for a fast Ethernet card, in >that case. > ... > >The TX threshold messages issued by the dc driver appear more as an >indication that the PCI bus is under severe load, than as a hint that >the dc driver is causing the reboots, IMHO. > >Regards, STefan >
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