Re: real time packet generation

From: Amit Kucheria (
Date: Mon Jul 09 2001 - 16:53:42 EST

For realtime scheduling we use KURT which stands for Kansas University
Real Time.

For packet generation we use Netspec which allow us to generate tcp/udp
traffic, set TOS values etc.

For giving these packets the highest priority, i guess u could use
diffserv tc commands, or am i misunderstanding your question here ?


On Mon, 9 Jul 2001, Akshay Adhikari wrote:

> Hello,
> I am working on the problem appearing below, and I was
> wondering if there is an "off the shelf" solution to
> it - something which wouldnt require too much
> writing/modification of the kernel code.
> >From a linux router, I need to be able to generate a
> periodic stream of packets in as real time a manner as
> possible.
> The router is diffserv capable, and there might be an
> arbitrary nesting of traffic classes at the outgoing
> device.
> Independent of the other traffic, the router should
> generate the periodic flow, so it doesnt help to just
> call dev_queue_xmit periodically. I need to ensure
> that the packet does go out as soon as the period is
> over.
> Is there an easy way to do this? (off the shelf) -
> like somehow classifying the internally generated
> packets
> as the highest priority in a sched_prio Qdisc and
> calling dev_queue_xmit periodically?
> Or an easier way?
> tia,
> akshay

                  Amit Kucheria
          EECS Grad. Research Assistant
           Team Niehaus || Room # 245E
         University of Kansas @ Lawrence
   (R)+1-(785)-830 8521 ||| (O)+1-(785)-864 7774

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