Date: Wed, 4 Nov 1998 09:31:02 -0500 (EST) From: Andrew Gallatin <gallatin@cs.duke.edu> To: Doug Rabson <dfr@nlsystems.com> Cc: freebsd-alpha@FreeBSD.ORG Subject: Re: What do these mean? Message-ID: <13888.25355.591294.275579@grasshopper.cs.duke.edu> In-Reply-To: <Pine.BSF.4.01.9811041002180.19324-100000@herring.nlsystems.com> References: <XFMail.981103204242.shimon@simon-shapiro.org> <Pine.BSF.4.01.9811041002180.19324-100000@herring.nlsystems.com>
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Doug Rabson writes: > On Tue, 3 Nov 1998, Simon Shapiro wrote: > > > Please save me the source hunting. what do the following messages mean? > > The machine is connected to a 3Com Linkbuilder 9at 100MHz). Everything else > > on that hub is FreeBSD but on the Intel boards, excpet the other Alpha > > which has a built-in tulip. > > > > de0: abnormal interrupt: transmit underflow (raising TX threshold to 96|256) > > de0: abnormal interrupt: transmit underflow (raising TX threshold to > > 128|512) > > de0: abnormal interrupt: transmit underflow (raising TX threshold to > > 160|1024) > > I get these all the time. They are harmless but annoying. The driver > seems to set up the wrong values for one of my de cards and then realise > its mistake later when it gets a few underflows. I had this with NetBSD > too so I haven't tried to debug it. I see this on pretty much every 2114x nic I have in i386 & alpha boxes, running FreeBSD, NetBSD & Digital UNIX. I seem remember looking at the driver a few months ago & concluding that this was proper behaviour. It tends to happen frequently when you make the PCI bus really busy. We see it all the time when using disk arrays & Myrinet. FWIW, Digital UNIX behaves the same way given similar workloads: tu0: transmit FIFO underflow: threshold raised to: 256 bytes tu0: transmit FIFO underflow: threshold raised to: 512 bytes tu0: transmit FIFO underflow: threshold raised to: 1024 bytes tu0: transmit FIFO underflow: using store-forward Drew ------------------------------------------------------------------------------ Andrew Gallatin, Sr Systems Programmer http://www.cs.duke.edu/~gallatin Duke University Email: gallatin@cs.duke.edu Department of Computer Science Phone: (919) 660-6590 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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