Hi everybody,
I am running a USRP2 with a DBSRX and talking to the hardware via raw
ethernet. Running GRC goes well (e.g. doing a real-time FFT spectrum),
but when I start recording on disc I get many "S" messages ("2
successive packets which do not have 2 successive sequence numbers")
after about 10 seconds. I am currently sampling with a decimation of 4,
but the problem remains with other decimation factors as wekk, just the
messages show up slightly delayed. I think the HD itself is not the
reason as I am recording to a 80 GB SSD, which has EXT4 and is mounted
in a quite fast mode (I have benchmarked the I/O giving me much more
bandwidth than what streams in from the USRP2).
I have started to modify parts of the GNURADIO code, but changing buffer
sizes does not help much.
Is there anybody who experienced similar troubles?
Regards,
Thomas Hobiger
--
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Dr. Thomas Hobiger
Space-Time Measurement Project
Space-Time Standards Group
New Generation Network Research Center
National Institute of Information and Communications Technology
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4-2-1 Nukui-Kitamachi, Koganei
184-8795 Tokyo
Japan
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email: hobi...@nict.go.jp
fax: ++81-042-327-6664
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homepage (priv.): http://www.hobiger.org
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