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[Discuss-gnuradio] LibUSRP vs LibUHD Performance on older machines

From: Tom Hendrick
Subject: [Discuss-gnuradio] LibUSRP vs LibUHD Performance on older machines
Date: Fri, 1 Mar 2013 14:51:35 -0800 (PST)

Hello all,

I've had trouble making a 4 channel USRP samples at 1Ms/s write to file at 500 kS/s with ubuntu 12.04 and libuhd.  I am getting several overruns and I had tried adjusting some of the parameters using usrd_probe_devices but with no success. I have a laptop with a duo core centrino processor which should be enough.

I've made this 4 channel work successfully with the same exact laptop and with ubuntu 10.04 and the older version of gnuradio that uses libusrp.  I get no underruns at all even for an entire hour of writing to file. 

Has anyone else experienced performance differences between libusrp and libuhd?  I just want to make sure it isn't a configuration problem or something I'm doing wrong causing the overruns.  If its likely an issue with libuhd, I guess I will just keep a backup of ubuntu 10.04 and gnuradio libusrp version installation files and leave my dual boot setup intact.
Thank you very much, - Tom

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