USRP N2xx or X3xx are network devices?
On 08/09/17 16:07, mle...@ripnet.com wrote:
USRP devices that are attached via USB don't use the networking stack,
so tweaking network-stack kernel parameters is irrelevant.
Since the USB devices use LibUSB, which is entirely user-space, the
transport parameters here should be investigated:
https://files.ettus.com/manual/page_transport.html#transport_usb_params
But if problems are occurring at low sample rates, it may be that your
USB subsystem just isn't up to the task.
On 2017-09-08 11:02, David wrote:
could you explain why please?
On 08/09/17 15:55, Marcus D. Leech via USRP-users wrote:
This is presumably a network-attached USRP (N2xx or X3xx)?
Otherwise, network parameters are irrelevant.
On 2017-09-08 10:25, Meelis Nõmm via USRP-users wrote:
Hello,
We lately bought 2 new NUC devices (a NUC7i7BNH and a
NUC6i7KYK), installed Debian 9 on it and tested Gnuradio on it.
At first we installed via apt-get. We saw some drops in the
gnuradio-companion and had issue with setting the real-time
priority, so we removed it from the system and installed it
again with pybombs.
However, no difference. Today tested it again with UHD provided
benchmark example (for easy reference). Saw occasional drops
with Sps from 1e6 to 10e6. Thought it might be a network driver
issue, updated the Intel network driver with the latest(?)
e1000e driver. Still no difference.
Any ideas, can we fix this somehow?
Thank you
Meelis
Additional information is in the file attached, but most
important system parameters:
#system
Linux 4.9.0-3-amd64 #1 SMP Debian 4.9.30-2+deb9u3 (2017-08-06)
#Network driver
00:1f.6 Ethernet controller: Intel Corporation Ethernet
Connection (2) I219-LM (rev 31)
filename:
/lib/modules/4.9.0-3-amd64/updates/drivers/net/ethernet/intel/e1000e/e1000e.ko
version: 3.3.5.10-NAPI
$ ./benchmark_rate --rx_rate 10e6 --duration 300
[INFO] [UHDlinux; GNU C++ version 6.3.0 20170516; Boost_106200;
UHD_3.11.0.git-181-g8f9f4184]
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