On Thu, 13 Oct 2005 17:05, Eric Blossom wrote: > > I believe it was gnuradio-examples/python/usrp/benchmark_usb.py that > > triggered the problem here. > > > > cheerio Berndt > > That should be the right answer, but is not completely reliable. > > Try running test_usrp_standard_rx with different values of the > -D <decim> option. Start with -D 128, then try -D 64, -D 32, -D 16, -D 8. > > -D 128 500kS/sec 2MB/sec > -D 64 1MS/sec 4MB/sec > -D 32 2MS/sec 8MB/sec > -D 16 4MS/sec 16MB/sec > -D 8 8MS/sec 32MB/sec > > Likewise, try test_usrp_standard_tx with different values of the > -I <interp> option. Start with -I 256, then try -I 128, 64, 32, 16. > > -I 256 500kS/sec 2MB/sec > -I 128 1MS/sec 4MB/sec > -I 64 2MS/sec 8MB/sec > -I 32 4MS/sec 16MB/sec > -I 16 8MS/sec 32MB/sec > > > A couple of over/run-runs at the beginning is OK for any given attempt. > > (Note, I just fixed a minor problem that would show 5 or more > tx_underruns at the beginning. Update usrp from CVS if you want the fix.)
On NetBSD benchmark_usb.py manages 8MB/sec whilst test_usrp_standard_XX stands up to 4MB/sec on NetBSD. I would be interested to see what FreeBSD can produce, although I suspect it will be the same on similar hardware. cheerio Berndt
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