From owner-freebsd-current  Sat Mar 28 13:26:24 1998
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To: Mark Murray <mark@grondar.za>
cc: current@FreeBSD.ORG
Subject: Re: VX driver in current acting up? 
In-reply-to: Your message of "Sat, 28 Mar 1998 22:09:18 +0200."
             <199803282009.WAA07410@greenpeace.grondar.za> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Sat, 28 Mar 1998 13:25:46 -0800
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>I have been getting funny behaviour from the VX driver (I have a
>3com 3c900).
>
>Occaisionally (randomly) the card/driver goes into "slow mode", and
>gives ridiculously slow respose on my local ethernet:
>
>PING gratis.grondar.za (196.7.18.133): 56 data bytes
>64 bytes from 196.7.18.133: icmp_seq=0 ttl=255 time=989.080 ms
>64 bytes from 196.7.18.133: icmp_seq=1 ttl=255 time=980.119 ms
...
>Notice how the times slowly improve by 10ms per echo? Strange.

   This happens when FreeBSD doesn't get any more interrupts from the card.
There is a one-second watchdog that notices some input and that's the reason
for the strange 0 to 1 second RTTs.

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project

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