Re: [Discuss-gnuradio] Kernel Ubuntu - USB 3.0 trouble - missed packets

Hello Cristian:

If you use Ubuntu 16.04.2, the kernel is 4.8, which should be fine.

The specific USB controller is also very important. The Intel controllers work best. Which controller do you have in your system? (run "lspci")

What flow control errors are you seeing? Are there any overruns ("O") or underruns ("U") printed on the console?

Did you increase the socket buffer sizes?

https://files.ettus.com/manual/page_transport.html#transport_udp_sockbufs

--​Neel Pandeya

On 15 May 2017 at 17:20, Cristian Rodríguez <cristian.rodriguez.ud@gmail.com> wrote:

HI all.

I was writing to the forum a time ago because i have missed packets when i build a simple flow graph in gnu radio and set the sample rate over 20Msamples/s.

The conclusion was that i had to review my USB 3.0 drivers but i'm working on ubuntu (16.05) and the only way to change the drivers is by installing another kernel. I have the newest version then i think the way is to install an older version.

What version of kernel could someone recommend me? I need to be able to get all the samples from my USRP B210. If someone has another suggestion i would be very thankful about it.

Pdta: My computer is fast enough (i7 4710HQ - 12Gb ram). Then it is not the problem.

Thanks a lot.

Best regards,

Cristian.

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