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Re: inter-packet gap in pktgen

To: Lennert Buytenhek <buytenh@xxxxxxxxxxxxxx>
Subject: Re: inter-packet gap in pktgen
From: Ben Greear <greearb@xxxxxxxxxxxxxxx>
Date: Tue, 07 Dec 2004 14:47:15 -0800
Cc: Robert Olsson <Robert.Olsson@xxxxxxxxxxx>, hadi@xxxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <20041207222522.GA30266@xi.wantstofly.org>
Organization: Candela Technologies
References: <20041207222522.GA30266@xi.wantstofly.org>
Sender: netdev-bounce@xxxxxxxxxxx
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Lennert Buytenhek wrote:

By tweaking the 'ipg' parameter I can generate pretty much any packet rate
I want, as long as I set ipg=(1e9/rate)-496 instead of something possibly
more straightforward.

That 496 will also change with load on the system, at least on average. I dealt with this by having a user-space app sample the rate and adjust the ipg to keep the average rate where I want it.

So, I'd suggest leaving the ipg as it is, and use external tools to get
the exact pps that you are looking for.

Ben

--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc  http://www.candelatech.com


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