Dmitry, 2x200e6 is extremely hard to maintain from software, and we haven't been able to sustain such rates ourselves. We are looking into it, but don't expect any radical improvements any time soon.
However, that explains Us, not Ss. Can you run ifconfig to see if the NIC is dropping packets? Thanks, Martin On 01/12/2018 09:10 AM, Дмитрий Михайличенко via USRP-users wrote: > Hi, > > I am unable to transmit two channels simultaneously without flow errors. > I have X310 with dual 10 Gige interface installed, the image was > uploaded from usrp_x310_fpga_XG.bit file. Every time I run benchmark > utility to transmit two channels at the full rate I get a lot of 'S' and > then 'U'. There are no problems with receiving two channels or > transmitting just one channel. > > > $ sudo /usr/local/lib/uhd/examples/benchmark_rate --args > "addr=192.168.30.2,second_addr=192.168.40.2" --tx_rate 200e6 > --tx_channels 0,1 > > [INFO] [UHDlinux; GNU C++ version 4.8.4; Boost_105400; > UHD_4.0.0.rfnoc-devel-376-g5a982809] > Creating the usrp device with: addr=192.168.30.2,second_addr=192.168.40.2... > [INFO] [X300] X300 initialization sequence... > [INFO] [X300] Determining maximum frame size... > [INFO] [X300] Maximum frame size: 8000 bytes. > [INFO] [X300] Determining maximum frame size... > [INFO] [X300] Maximum frame size: 8000 bytes. > [INFO] [X300] Setup basic communication... > [INFO] [X300] Loading values from EEPROM... > [INFO] [X300] Setup RF frontend clocking... > [INFO] [X300] Radio 1x clock:200 > [INFO] [RFNOC] [DMA FIFO] Running BIST for FIFO 0... > [INFO] [RFNOC] pass (Throughput: 1304.3MB/s) > [INFO] [RFNOC] [DMA FIFO] Running BIST for FIFO 1... > [INFO] [RFNOC] pass (Throughput: 1304.5MB/s) > [INFO] [RFNOC RADIO] Register loopback test passed > [INFO] [RFNOC RADIO] Register loopback test passed > [INFO] [RFNOC RADIO] Register loopback test passed > [INFO] [RFNOC RADIO] Register loopback test passed > [INFO] [CORES] Performing timer loopback test... > [INFO] [CORES] Timer loopback test passed > [INFO] [CORES] Performing timer loopback test... > [INFO] [CORES] Timer loopback test passed > Using Device: Single USRP: > Device: X-Series Device > Mboard 0: X310 > RX Channel: 0 > RX DSP: 0 > RX Dboard: A > RX Subdev: SBX-120 RX > RX Channel: 1 > RX DSP: 0 > RX Dboard: B > RX Subdev: SBX-120 RX > TX Channel: 0 > TX DSP: 0 > TX Dboard: A > TX Subdev: SBX-120 TX > TX Channel: 1 > TX DSP: 0 > TX Dboard: B > TX Subdev: SBX-120 TX > > Setting device timestamp to 0... > [INFO] [MULTI_USRP] 1) catch time transition at pps edge > [INFO] [MULTI_USRP] 2) set times next pps (synchronously) > Testing transmit rate 200.000000 Msps on 2 channels > SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS..... > > If I reduce sample rate to 100 Msps there are only 'U' errors left. With > lower rate (10 Msps) errors disappear. Does X310 allow to transmit two > 200 Msps channels simultaneously? > > > thanks, > Dmitry > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
