Re: Iperf and latency

To: iperf-users --at-- dast.nlanr.net
Subject: Re: Iperf and latency
From: Marc.Herbert --at-- ens-lyon.fr
Date: Mon, 9 Dec 2002 15:11:25 +0100 (CET)
Cc: pshields --at-- NAVINI.com
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In-reply-to: <Pine.LNX.4.44.0212061626470.23043-100000 --at-- osage.ncsa.uiuc.edu>
Reply-to: Marc.Herbert --at-- ens-lyon.fr
Sender: owner-iperf-users --at-- dast.nlanr.net

On  6 Déc, Kevin Gibbs wrote:
>> Would it be feasible to add latency measurement to iperf or is it there and
>> I am just missing it? 
> 
> Not really, Iperf is a unidirectional tool and so it can not determine the 
> latency between the two hosts.
> 
>> What methods for capturing latency during a test do
>> others use? 
> 
> ping works fine. 
> 

"mtr" (shipped with most linux distributions) is also nice.

You can also run tcpdump while "iperf-ing", and then create nice RTT
graphs with tcptrace + xplot.

Cheers,

Marc.

References:
- Re: Iperf and latency
  - From: Kevin Gibbs

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