[Discuss-gnuradio] Finally, OMAP3 USB numbers

[Philip Balister]

OK, I rebuilt Angstrom with libusb-0.12 ans tested on my Gumstix Overo. 
The Overo has a working EHCI host port. (Well after I removed a speck 
from the back of the board called R26) Enough about my problems and 
eyesight.

Running :

# ./test_usrp_standard_rx -D 10
xfered 1.34e+08 bytes in 5.27 seconds.  2.547e+07 bytes/sec.  cpu time = 
3.969
noverruns = 0

# ./test_usrp_standard_rx -D 256
xfered 1.34e+08 bytes in 134 seconds.  1e+06 bytes/sec.  cpu time = 0.2422
noverruns = 0

# ./test_usrp_standard_tx -I 512
xfered 1.34e+08 bytes in 134 seconds.  1e+06 bytes/sec.  cpu time = 5.14
0 underruns

# ./test_usrp_standard_tx -I 24
xfered 1.34e+08 bytes in 6.29 seconds.  2.133e+07 bytes/sec.  cpu time = 
5.38
0 underruns

10 is the smallest decimation without overruns and 24 is the smallest 
interpolation without underruns. I doubt we can do much at the higher 
rates, but the basic numbers look good.

Philip

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