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Date:      Wed, 17 Jan 2001 16:05:48 +1100
From:      Peter Jeremy <peter.jeremy@alcatel.com.au>
To:        thierry.herbelot@free.fr
Cc:        freebsd-hackers@FreeBSD.ORG
Subject:   Re: What to do if a box is just "frozen"
Message-ID:  <20010117160547.C98607@gsmx07.alcatel.com.au>

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On Mon, 15 Jan 2001 23:01:15 +0100, Thierry Herbelot <thierry.herbelot@free.fr> wrote:
>I've got a little application at work which can "just freeze" a
>4.2-Release : the purpose of the application is just a packet blaster
>used for telecom equipement test (send as many UDP packets as ordered,
>on as many interfaces as there are on a machine).
>
>So, on my 4.2-R test box (no-thrills BX, P-III 700 intel box), I have
>some tens (around 30 of them) of such processes sending their packets,
>and after some time (I have to more precisely determine this "some
>time"), the box simply locks.
>I do not see any message on console.

What network card(s) are you using?  What other cards/devices are in
the box?

Can you send an NMI to the box?  (NMI can usually be generated by
pulling I/0 channel check on the ISA bus low.  I/0 channel check is
pin A1 (and there's a convenient ground on pin B1).  ([AB]1 is the
pins closest to the rear of the machine).  NMI should trap to DDB.

Peter


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