Re: [Discuss-gnuradio] USRP - FC3 usb transfer rate tx. vs. rx.

[Eric Blossom]

On Mon, Mar 07, 2005 at 07:13:22AM -0600, Greg Spanel wrote:
> I'm running Fedora core 3 on several different machines including
> one with the Intel motherboard with the fast southbridge.
> 
> The tx. transfer rate on all of these machines is 6meg/sec. using
> test_usrp_standard_tx.
> The rx. rate is 32meg/sec., however.
> 
> I found that if you comment out line 250 in test_usrp_standard_tx
> and recompile, the tx. transfer rate jumps to 32meg/sec.
> 
> Line 250 was printf("tx_underrun\n"); now is //printf("tx_underrun\n");
> 
> I hope this helps,
> 
> Greg Spanel

Let me guess, you're using a gnome-terminal window?

They are really, really slow.

As an experiment try running the unmodified example in an xterm, or
change the printf to printf("U").

Eric