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Re: GigE (was Re: [Discuss-gnuradio] DSP based SDR)


From: Eric Blossom
Subject: Re: GigE (was Re: [Discuss-gnuradio] DSP based SDR)
Date: Fri, 24 Jun 2005 06:09:27 -0700
User-agent: Mutt/1.5.6i

On Fri, Jun 24, 2005 at 02:31:41PM +0200, Harald Welte wrote:
> On Thu, Jun 23, 2005 at 08:52:33PM -0700, Eric Blossom wrote:
> 
> I don't really understand why you would want flow control.
> 

Think about the transmit path.

Simplest possible test case:

  Software sine wave generator talking to transmit hardware.  There is
  nothing throttling the signal generator.  It will produce an
  infinite amount of data as quickly as it can.  You want the DAC
  clock to control pacing.  Any kind of host based pacing will lead to
  trouble (under or overruns).

Eric




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