Hi Michael,
User now using a better PC, on Windows he’s streaming 20 Msps and is a happy bunny. As he doesn’t have 10GigE he can’t really do much more (20Msps = 675Mbps he says). My ‘bitching’ is really the way UHD.dll handles frames – ideally I should be able to have the software group frames together, for example with the B200 were I to run 4 or 8 frames in a group I am convinced the CPU load would be lower and I would get the full 56MHz of bandwidth. For example I can run 60MHz with ease from the bladeRF. Back to the X310 – with 10GigE what’s the maximum sustained bandwidth that you get on Linux? Obviously frames will be bigger due to bigger 10GigE MTUs. Simon Brown, G4ELI https://www.sdr-radio.com From: Michael Dickens <[email protected]> Sent: 20 February 2020 17:00 To: [email protected] Cc: USRP list <[email protected]> Subject: Re: [USRP-users] UHD 3.15 LTS, X310 performance Hi Simon - When you say "but performance is not great" ... beyond CPU load: do you get good Tx and Rx rates (e.g., if you run "benchmark_rate") without underruns / overflows / late packets (etc)? What is the MTU set to for this ENET link? 1 GbE or 10 GbE? Can you provide a little more detail for us to work with here? Thx! - MLD On Thu, Feb 20, 2020 at 10:11 AM Simon G4ELI via USRP-users <[email protected] <mailto:[email protected]> > wrote: Hi, Now using UDB 3.15 LTZ instead of UHD 4.0 and a user’s X310 works but performance is not great: * CPU load high, * MTU size results in only 364 samples per buffer which I believe to indirectly cause the high CPU. I’ve not found much on the Ettus site apart from ensuring the MTU size is correct, so the question is: how on earth do I get better streaming from the X310? As I’m compiling 3.15 LTS from source making changes is easy. Simon Brown, G4ELI https://www.sdr-radio.com _______________________________________________ USRP-users mailing list [email protected] <mailto:[email protected]> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com -- Michael Dickens Ettus Research Technical Support Email: [email protected] <mailto:[email protected]> Web: https://ettus.com/
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