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Re: [Discuss-gnuradio] Understanding flow control

From: Tom Gross
Subject: Re: [Discuss-gnuradio] Understanding flow control
Date: Fri, 15 Jan 2010 18:08:34 -0500

yes of course we have two separate gig-e cards.   if the usrp2 is
sending us "pause" commands then it seems evident the usrp2 is having
trouble keeping up, not the computer.

On Fri, Jan 15, 2010 at 6:04 PM, Matt Ettus <address@hidden> wrote:
>> Incidentally my System Engineer/Project Lead points out that if the
>> USRP2 is actually telling the host to stop sending (which certainly
>> appears to be the case) then we are only able to get overall
>> throughput with two USRP2s over two gig-e connections comparable to
>> what we were getting with a single USRP over a single USB 2.0 line.
>> Something of a disappointment to us.
> That is not correct.  If you have 2 USRP2s both connected by gig-e, then you
> need 2 separate gig-e cards.  You should be able to get the full throughput
> to each one, but your computer may have a hard time keeping up.
> Matt

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