[USRP-users] b200 Overflows

Simon Brown simon at sdr-radio.com
Sat Sep 27 14:00:19 EDT 2014


Thanks,

 

I've tried changing these, still get overruns with sample rates of 8MS/s or
higher.

 

Simon Brown G4ELI
http://v2.sdr-radio.com

 

From: USRP-users [mailto:usrp-users-bounces at lists.ettus.com] On Behalf Of
Marcus D. Leech via USRP-users
Sent: 26 September 2014 20:03
To: usrp-users at lists.ettus.com
Subject: Re: [USRP-users] b200 Overflows

 

On 09/26/2014 02:18 PM, Simon Brown via USRP-users wrote:

Hi,

 

Windows 64-bit: I'm streaming nicely, none of my threads indicate CPU
problems (plenty of headroom). At 8MB/s and higher I'm getting fastpath
Overrun messages every second or so even though I'm pulling data from the
b200 as fast as it's available, I am not CPU limited in any way. Using Intel
USB 3.

 

FWIW I don't see any way to tune the uhd::rx_streamer - bigger / more
buffers, also I don't see any way to flush either.

 

Interestingly if I get my CUDA card working harder (more work on the bus)
the Overrun messages appear more frequently. I7 4770k, good motherboard
(can't remember what).

 

Any suggestions?

 

Simon Brown G4ELI
http://v2.sdr-radio.com

 






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The USB transport parameters can be tweaked:

http://files.ettus.com/manual/page_transport.html#transport_usb_params



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