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Date: Mon, 27 Oct 1997 09:44:40 -0800 (PST)
From: Julian Elischer <julian@whistle.com>
To: Charles Henrich <henrich@crh.cl.msu.edu>
cc: Don Lewis <Don.Lewis@tsc.tdk.com>, Matt Thomas <matt@3am-software.com>,
        Jaye Mathisen <mrcpu@cdsnet.net>, freebsd-hackers@FreeBSD.ORG
Subject: Re: de0 errors
In-Reply-To: <19971027091235.60825@crh.cl.msu.edu>
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try netstat -I de0 -b 1

On Mon, 27 Oct 1997, Charles Henrich wrote:

> On the subject of Re: de0 errors, Don Lewis stated:
> 
> > On Oct 23,  7:51am, Matt Thomas wrote:
> > } Subject: Re: de0 errors
> > } At 12:57 AM 10/23/97 -0400, Charles Henrich wrote:
> > } >After moving to 2.2.5-RELEASE im seeing:
> > } >
> > } >Oct 23 00:32:12 msunews /kernel: ccd0-3: Concatenated disk drivers
> > } >Oct 23 00:35:45 msunews /kernel: de0: abnormal interrupt: transmit underflow
> > } >(raising TX threshold to 96|256)
> > } >Oct 23 00:36:01 msunews /kernel: de0: abnormal interrupt: transmit underflow
> > } >(raising TX threshold to 8|512)
> > } >Oct 23 00:37:41 msunews /kernel: de0: abnormal interrupt: transmit underflow
> > } >(raising TX threshold to 1024)
> > } >Oct 23 00:55:14 msunews /kernel: de0: abnormal interrupt: transmit underflow
> > } >(switching to store-and-forward mode)
> > } >
> > } >Any ideas?  Are these informational, or are they bad?
> > } 
> > } they are informational.
> > 
> > In the sense that everything is working, but if you're seeing transmit
> > underflows even when the TX threshold has been set to 1024, then I suspect
> > you'll have a real problem getting anywhere near full performance out
> > of the card.
> 
> Can you suggest any debugging tips for isolating and fixing this problem?
> 
> Just using FTP between two hosts on the 100mbit net I see 2-3MB/sec and
> receive at about half that.  However this system is also a very busy news
> server.  I wish FreeBSD had a top or systat function that showed network
> traffic in K/Sec.
> 
> -Crh
> 
>        Charles Henrich     Michigan State University     henrich@msu.edu
> 
>                          http://pilot.msu.edu/~henrich
>