Shot in the dark Erik:
What is your MTU set at for the ethernet port? Try setting it to 9000 if
it isn't and see if that does anything for you.
________________________________
From: USRP-users <usrp-users-boun...@lists.ettus.com> on behalf of Erik Heinz
via USRP-users <usrp-users@lists.ettus.com>
Sent: Monday, July 29, 2019 7:30 AM
To: usrp-users@lists.ettus.com <usrp-users@lists.ettus.com>
Subject: [USRP-users] X310 slow with gnuradio
Hi,
I am getting lots of underflow errors when sending with gnuradio to an X310 at
sampling rates of 50 MSps and higher. The flowchart is as simple as possible: a
signal source and a
"UHD: USRP Sink" block. When sending and receiving at the same time, the
performance is even worse.
The X310 is connected to the PC by 10G ethernet. Using the UHD example programs
benchmark_rate, tx_waveforms, txrx_loopback_to_file etc., a sampling rate of
200 MSps full duplex is no problem at all. So it is not a problem of the UHD
driver and the network setup should be OK as well.
The processor is an Intel core i3-7100 @3.9GHz. A gnuradio flowchart with a
signal source, a throttle block and a file sink works at 50 MSps sampling rate
and more, so the processor speed should not be a problem either. The gnuradio
version is 3.7.11 which is the one currently distributed for Ubuntu buster.
Any ideas? Could an update to a more recent gnuradio version help?
Best regards,
Erik
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