Thanks Marcus, I also thought the same thing. Just to be safe I had run the
uhd_usrp_probe call with the default settings before trying the suggestions
from Josh.
________________________________
From: Marcus D. Leech <mle...@ripnet.com>
To: discuss-gnuradio@gnu.org
Sent: Saturday, March 2, 2013 3:25 PM
Subject: Re: [Discuss-gnuradio] LibUSRP vs LibUHD Performance on older machines
Josh thanks so much for the suggestion.
>I left the tb.run() alone, and used the default settings for the
uhd_usrp_probe --args call for setting the frame size and number
of frames.
>
>I also just changed the buffer size for the usrp_source block by
setting the following before the tb.run():
>
>tb.uhd_usrp_source_0.set_max_output_buffer(50000000) and I was
getting overruns still. I also tried setting it higher to
>500000000 and still got overruns within about 10-20 seconds.
>
>Do you have any other quick suggestions? I just went back to
testing on the older gnuradio libusrp 4 channel version and
ubuntu 10.04 for longer durations. It gives no overruns up until
about 30 minutes of running. This is at least usable. I wonder
if the buffer settings on the older setup is higher then newer
one. I'm not sure how to determine this.
>
>Thanks, -Tom
>
>
The frame size and number of frames settings are per-session, so setting them
in uhd_usrp_probe will have no effect, as far as I know, on
future sessions.
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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