From owner-freebsd-hackers  Wed Feb 10 07:34:48 1999
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From: etxgnon@etxb.ericsson.se (Gunnar Olsson)
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Date: Wed, 10 Feb 1999 16:34:15 +0100
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To: luigi@labinfo.iet.unipi.it
Subject: Re: real time measurements
Cc: hackers@FreeBSD.ORG
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> From majordom@FreeBSD.ORG Wed Feb 10 16:20 MET 1999
> Delivered-To: vmailer-hackers@freebsd.org
> From: Luigi Rizzo <luigi@labinfo.iet.unipi.it>
> Subject: Re: real time measurements
> To: etxgnon@etxb.ericsson.se (Gunnar Olsson)
> Date: Wed, 10 Feb 1999 14:04:17 +0100 (MET)
> Cc: hackers@FreeBSD.ORG, etxgnon@etxb.ericsson.se
> X-Loop: FreeBSD.ORG
> 
> > I'm doing real time measurements through a PC,
> > which I use as a router. Sometimes a packet is delayed
> > through the system, even though the load is low.
> > I have tried to disable all not necessary processes,
> > but still I can see this delay.
> > 
> > Does anyone know if something is going around in the
> > system? Some parameter I can set?
> > Please let me know!
> 
> how much delay, and how can you tell that -- it could be delayed by
> ethernet collisions or anything.
> 
> 	luigi
> 
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> 

Hi,
no collision problems.
One incoming port and one outgoing port and no congestion.
I have now time stamp the packets trough the system and find 
an increase from normal 5 microsecunds to 200 microsecund between 
the functions ip_input and ip_output sometimes.

Any ideas?

Regards,
Gunnar

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