Panny Wang, I notice that you're only specifying a single streaming address in your call to benchmark rate, implying that you're only leveraging a single 10GbE link. You can specify "addr0=<xxx.xxx.xxx.xxx>,addr1=<xxx.xxx.xxx.xxx>" in your device args.
Best, Sam Reiter SDR Applications Engineer Ettus Research On Wed, Oct 30, 2019 at 3:20 AM 王盼 via USRP-users < usrp-users@lists.ettus.com> wrote: > Hello, > Nate.I want to use DPDK in UHD with N310 follow > https://files.ettus.com/manual/page_dpdk.html > <https://files.ettus.com/manual/page_dpdk.html.>,but the result is not > satisfactory.I > got you have some research about this from the user-list emails(*With an > i7-4790k / Intel x520-DA2 and N310, to stream at full duplex, over two > channels at 125 MS/s, the lowest I can run my CPU clock freq at without > flow control errors is 3.8 GHz using benchmark_rate and the native > networking stack. Using DPDK I can run 2x2 @ 125 MS/s with my CPU freq > locked at 1.5 GHz with no flow control errors. *). > May be you can do me a favor and have some idea about my quesion. > (1) I use benchmark_rate to test the streaming performance, I only got > 122.88MS/s for 1channel, or 61.44MS/s for 2x2. run with 2x2@122.88MS/s , > a lot of samples dropped. > Unfortuately, my destination is 4x4@122.88MS/s. I don't know is it > possible for my present host machine, or what configuration of host > machine should have? > ubuntu server 18.04 uhd:3.14.1.1 dpdk 17.11.6 dual 10GbE links (XG > image loaded) > host machine: 4 node, 8 cores in each node, tota 32 cores, cpu: Intel(R) > Xeon(R) CPU E5-4650 0 @ 2.70GHz > more informations about my host machine is in the attchachment.(hypethread > closed, cpufrequtils GOVERNOR="perfomance") > * --args > "type=n3xx,mgmt_addr=192.168.1.104,addr=192.168.20.2,master_clock_rate=122.88e6,use_dpdk=1" > \* > * --duration 60 \* > * --channels "0,1" \* > * --rx_rate 122.88e6 \* > * --rx_subdev "A:0 A:1" \* > * --tx_rate 122.88e6 \* > * --tx_subdev "A:0 A:1" * > * Benchmark rate summary:* > * Num received samples: 2744145668* > * Num dropped samples: 6030320380* > * Num overruns detected: 921* > * Num transmitted samples: 14684137560* > * Num sequence errors (Tx): 0* > * Num sequence errors (Rx): 0* > * Num underruns detected: 67231* > * Num late commands: 0* > * Num timeouts (Tx): 0* > * Num timeouts (Rx): 0* > > (2) In the txrx_loopback_to_file test ,when I use the default --setting > for 4*4channels, there is a error *UUUUError: Receiver error > ERROR_CODE_LATE_COMMAND* . > I change it to --setting 1 ,it works. > I want to know the influence to my streaming or sample datas if 1 increase > --setting? > *(--settling arg (=0.20000000000000001) settling time (seconds) > before receiving)* > > Much appreciated. > > Regards, > Panny Wang > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
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