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Date:      Fri, 26 Nov 1999 07:10:31 +1100
From:      Peter Jeremy <jeremyp@gsmx07.alcatel.com.au>
To:        Thomas Graichen <graichen@innominate.de>
Cc:        alpha@FreeBSD.ORG
Subject:   Re: de0: abnormal interrupt: transmit underflow
Message-ID:  <99Nov26.070333est.40323@border.alcanet.com.au>
In-Reply-To: <Pine.BSF.4.10.9911251857170.6429-100000@piano.bln.innominate.de>
References:  <Pine.BSF.4.10.9911251857170.6429-100000@piano.bln.innominate.de>

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On 1999-Nov-26 04:58:57 +1100, Thomas Graichen wrote:
>anyone an idea what exactly this means ?
>
>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)
>
>... but i think this has more to do with the networking here
>than with FreeBSD/alpha - but maybe its also related to the
>de driver for the alpha - any ideas ?

The Tulip driver in Digital UNIX does the same as well.  I thought I'd
seen an explanation for it somewhere, but can't find it right now.  (I
think it's related to the DMA buffer thresholds).

Peter


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