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