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Re: [Discuss-gnuradio] My block falling behind the USRP

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] My block falling behind the USRP
Date: Wed, 14 Mar 2007 21:20:41 -0700
User-agent: Mutt/1.5.9i

On Wed, Mar 14, 2007 at 07:36:19PM -0700, Chris Stankevitz wrote:
> What happens when a c++ block I write cannot keep up with the data the 
> USRP is producing?  In other words, my c++ block cannot keep up with 
> real time.

The USRP library will report that the USRP is dropping samples.  
If you're not keeping up, it's got no place to put them.

> Is there a way to tell (in c++) that I am falling behind?
> Thank you!
> Chris

You'll see uOuOuO... on stderr


 u = usrp.source_c(...)
 nover = u.noverruns()

returns the number of overruns detected.  Note that behind the scenes
the library polls for overruns at about 10Hz, so if you're seeing any,
you're probably getting a lot of them ;)


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