Damon: Yes I hadn’t realized that sudo was needed for DPDK since I don’t use it routinely myself.
This is still an outstanding issue with DPDK apparently. Sent from my iPhone > On Jun 26, 2020, at 7:51 AM, Damon qiu <[email protected]> wrote: > > > Hi Marcus, > Since you forgot to copy the email to me, I have to reply your email here. > 'sudo' is for using dpdk. Do you have any way to use dpdk without super > authority? > > Hi Rob, > Your information is very helpful. I will try that next week when I am back to > the office. Thanks. > > Best regards, > Damon > >> On Thu, 25 Jun 2020 at 01:46, guowang qiu <[email protected]> wrote: >> Hi all, >> >> I am trying to set my USRP X310 to send out signals in burst mode at 200Msps >> sample rate on two channels. My target is sending out bursts of 100ms >> without underflow. >> The OS is Ubuntu 18.04, UHD version v3.15.0.0, DPDK is used in the test. The >> CPU is set to 4.2GHz. >> The X310 is connected to the host by dual 10 Gigabit Ethernet. >> >> sudo /usr/local/lib/uhd/examples/tx_bursts >> --args="type=x300,use_dpdk=1,addr=192.168.30.2,second_addr=192.168.40.2,send_frame_size=8000,num_send_frames=512" >> --repeat --dilv --nsamps=20000000 --channels=0,1 --rate=200e6 >> >> If nsamps is set to 100000, there is no U printed. But if nsamps is large >> than 120000, the terminal prints a lot of U. >> Question 1: the depth of DMA FIFO is 32MB by default, I guess there should >> be 8M samples stored in the DMA FIFO, why it seems that it just store 100K >> samples? >> Question 2: is there anything I could do to achieve my goal? >> >> Best regards, >> Damon >>
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