From dave@educentre.com Tue May 18 09:58:10 1999
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Date: Tue, 18 May 1999 17:57:56 +0100 (BST)
From: dave@educentre.com
Reply-To: dave@educentre.com
To: FreeBSD-gnats-submit@freebsd.org
Subject: performance bug: network devices fxp :  de perform Very slowly when both cards are in a single machine
X-Send-Pr-Version: 3.2

>Number:         11765
>Category:       kern
>Synopsis:       performance bug: network devices fxp & de perform Very slowly when both cards are in a single machine
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue May 18 10:00:01 PDT 1999
>Closed-Date:    Tue Mar 13 07:25:21 PST 2001
>Last-Modified:  Tue Mar 13 07:25:46 PST 2001
>Originator:     David Hanney
>Release:        FreeBSD 3.1-STABLE i386
>Organization:
educentre
>Environment:

FreeBSD
www.educentre.com 3.1-STABLE FreeBSD 3.1-STABLE #3: Mon May 17 15:58:26 BST 1999
dave@www.educentre.com:/usr/src/sys/compile/EDUCENTRE  i386

>Description:

If you have a de network card (Kingston)
and an fxp network card (Intel) in a single
machine then you can't get more than 14K/s
xfer speed down the de network card.

>How-To-Repeat:

Machine A is multihomed.
It has an fxp network card (e.g. used to talk to the net)
and a de network card (used to talk to machine B)

Machine B is singehomed.
It has a de network card used only for talking with machine A.

FTP GET on machine B from A (or vice versa) goes at max speed of 14K/s
down a short:) length of UTP crossover.
both de cards are talking 10baset/utp half duplex

>Fix:

Swapping the fxp card with machine B's de card
(so that each machine contains just one type of card)
restores performance to expected levels.


>Release-Note:
>Audit-Trail:

From: David Greenman <dg@root.com>
To: dave@educentre.com
Cc: FreeBSD-gnats-submit@FreeBSD.ORG
Subject: Re: kern/11765: performance bug: network devices fxp : de perform Very slowly when both cards are in a single machine 
Date: Tue, 18 May 1999 14:45:51 -0700

 >>Description:
 >
 >If you have a de network card (Kingston)
 >and an fxp network card (Intel) in a single
 >machine then you can't get more than 14K/s
 >xfer speed down the de network card.
 >
 >>How-To-Repeat:
 >
 >Machine A is multihomed.
 >It has an fxp network card (e.g. used to talk to the net)
 >and a de network card (used to talk to machine B)
 >
 >Machine B is singehomed.
 >It has a de network card used only for talking with machine A.
 >
 >FTP GET on machine B from A (or vice versa) goes at max speed of 14K/s
 >down a short:) length of UTP crossover.
 >both de cards are talking 10baset/utp half duplex
 >
 >>Fix:
 >
 >Swapping the fxp card with machine B's de card
 >(so that each machine contains just one type of card)
 >restores performance to expected levels.
 
    Sounds like an autonegotiation/duplex problem. I suggest forcing both sides
 to 100/full.
 
 -DG
 
 David Greenman
 Co-founder/Principal Architect, The FreeBSD Project - http://www.freebsd.org
 Creator of high-performance Internet servers - http://www.terasolutions.com
 
State-Changed-From-To: open->closed 
State-Changed-By: jlemon 
State-Changed-When: Tue Mar 13 07:25:21 PST 2001 
State-Changed-Why:  
Timed out; problem likely to be duplex mismatch. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=11765 
>Unformatted:
