USRP-RIO Initialize use CPU

[Guillaume_B]

Hi,

Today i was running some test with a USRP-RIO.

I'm using LabVIEW 2016, NI USRP 17.2 driver and USRP-2944 and 2950 connected with MXI link.

When NI USRP Open Rx session.vi is executed, a process is launched by the DLL and is using 1 CPU equivalent load (if 4 cores = 30%, if 8 cores = 13%). I can observe it by watching the LabVIEW process in the windows task manager.

I wrote a little VI to reproduce the problem.

Can anybody try this VI and tell me if he can see the same problem.

I tryied whith a 2901 and the problem does not appear.

Thank you,

regards

Guillaume

[Anatoli_A]

Hi, I have the same problem with USRP-2954 and 2955 using USRP API (LabVIEW 18.0SP1, driver USRP 18.0). However, there is no processor load with the 1G or 10G serial link or the USRP-RIO use.

Regards,

Anatoli

[guillaume-arcale]

Hi Anatoly,

Thank you forreporting your experience !

Any idea from NI support ?

Thank you

[Anatoli_A]

Hi, Guillaume,

NI support recomended to install the latest USRP 19.1 driver. It really fixed the issue with processor load and many other issues too. However, Readme file  (http://www.ni.com/pdf/manuals/374760v.html#fixes) does not contain any info about this bug fix. An FPGA image of USRP devices must be updated after driver installation using NI-USRP configuration utility.

Regards,

Anatoli