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
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