I went back and looked at the 2974…. Got it. It’s one x310 with 2 interfaces
(30.2, 40.2), so it would make sense that the second instance doesn’t work.
Thank you.
In regards to the 8000 MTU, I set this up on the server (directly connected to
30.2), I still get the same trickle of S’s at low sps of 6.25M.
Here are the results of an Rx at 200e6, a Tx at 200e6, Tx 6.25e6, Tx 1.0e6. So
strange that I get out of sequence at 6.25
```
~/uhd_versions/uhd_4.4.0.0/host/build/examples$ ./benchmark_rate
--args="type=x300,addr=192.168.30.2" --rx_rate=200e6 --duration=30
[INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400;
UHD_4.4.0.HEAD-0-g5fac246b
[00:00:00.000198] Creating the usrp device with: type=x300,addr=192.168.30.2...
[INFO] [X300] X300 initialization sequence...
[INFO] [X300] Maximum frame size: 8000 bytes.
[INFO] [GPS] Found an internal GPSDO: LC_XO, Firmware Rev 0.929a
[INFO] [X300] Radio 1x clock: 200 MHz
Using Device: Single USRP:
Device: X-Series Device
Mboard 0: X310
RX Channel: 0
RX DSP: 0
RX Dboard: A
RX Subdev: UBX RX
RX Channel: 1
RX DSP: 1
RX Dboard: B
RX Subdev: UBX RX
TX Channel: 0
TX DSP: 0
TX Dboard: A
TX Subdev: UBX TX
TX Channel: 1
TX DSP: 1
TX Dboard: B
TX Subdev: UBX TX
[00:00:03.370079690] Setting device timestamp to 0...
[00:00:03.372464052] Testing receive rate 200.000000 Msps on 1 channels
[00:00:33.373075031] Benchmark complete.
Benchmark rate summary:
Num received samples: 6000007360
Num dropped samples: 0
Num overruns detected: 0
Num transmitted samples: 0
Num sequence errors (Tx): 0
Num sequence errors (Rx): 0
Num underruns detected: 0
Num late commands: 0
Num timeouts (Tx): 0
Num timeouts (Rx): 0
Done!
~/uhd_versions/uhd_4.4.0.0/host/build/examples$ ./benchmark_rate
--args="type=x300,addr=192.168.30.2" --tx_rate=200e6 --duration=30
[INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400;
UHD_4.4.0.HEAD-0-g5fac246b
[00:00:00.000157] Creating the usrp device with: type=x300,addr=192.168.30.2...
[INFO] [X300] X300 initialization sequence...
[INFO] [X300] Maximum frame size: 8000 bytes.
[INFO] [GPS] Found an internal GPSDO: LC_XO, Firmware Rev 0.929a
[INFO] [X300] Radio 1x clock: 200 MHz
Using Device: Single USRP:
Device: X-Series Device
Mboard 0: X310
RX Channel: 0
RX DSP: 0
RX Dboard: A
RX Subdev: UBX RX
RX Channel: 1
RX DSP: 1
RX Dboard: B
RX Subdev: UBX RX
TX Channel: 0
TX DSP: 0
TX Dboard: A
TX Subdev: UBX TX
TX Channel: 1
TX DSP: 1
TX Dboard: B
TX Subdev: UBX TX
[00:00:03.415515038] Setting device timestamp to 0...
[WARNING] [0/Radio#0] Attempting to set tick rate to 0. Skipping.
Setting TX spp to 1996
[00:00:03.418182017] Testing transmit rate 200.000000 Msps on 1 channels
USSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS[00:00:33.419713489]
Benchmark complete.
Benchmark rate summary:
Num received samples: 0
Num dropped samples: 0
Num overruns detected: 0
Num transmitted samples: 6000235480
Num sequence errors (Tx): 76
Num sequence errors (Rx): 0
Num underruns detected: 1
Num late commands: 0
Num timeouts (Tx): 0
Num timeouts (Rx): 0
Done!
~/uhd_versions/uhd_4.4.0.0/host/build/examples$ ./benchmark_rate
--args="type=x300,addr=192.168.30.2" --tx_rate=6.25e6 --duration=30
[INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400;
UHD_4.4.0.HEAD-0-g5fac246b
[00:00:00.000187] Creating the usrp device with: type=x300,addr=192.168.30.2...
[INFO] [X300] X300 initialization sequence...
[INFO] [X300] Maximum frame size: 8000 bytes.
[INFO] [GPS] Found an internal GPSDO: LC_XO, Firmware Rev 0.929a
[INFO] [X300] Radio 1x clock: 200 MHz
Using Device: Single USRP:
Device: X-Series Device
Mboard 0: X310
RX Channel: 0
RX DSP: 0
RX Dboard: A
RX Subdev: UBX RX
RX Channel: 1
RX DSP: 1
RX Dboard: B
RX Subdev: UBX RX
TX Channel: 0
TX DSP: 0
TX Dboard: A
TX Subdev: UBX TX
TX Channel: 1
TX DSP: 1
TX Dboard: B
TX Subdev: UBX TX
[00:00:03.350475486] Setting device timestamp to 0...
[WARNING] [0/Radio#0] Attempting to set tick rate to 0. Skipping.
Setting TX spp to 1996
[00:00:03.353129760] Testing transmit rate 6.250000 Msps on 1 channels
SSSSS[00:00:33.375330149] Benchmark complete.
Benchmark rate summary:
Num received samples: 0
Num dropped samples: 0
Num overruns detected: 0
Num transmitted samples: 187641964
Num sequence errors (Tx): 5
Num sequence errors (Rx): 0
Num underruns detected: 0
Num late commands: 0
Num timeouts (Tx): 0
Num timeouts (Rx): 0
Done!
~/uhd_versions/uhd_4.4.0.0/host/build/examples$ ./benchmark_rate
--args="type=x300,addr=192.168.30.2" --tx_rate=1e6 --duration=30
[INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400;
UHD_4.4.0.HEAD-0-g5fac246b
[00:00:00.000162] Creating the usrp device with: type=x300,addr=192.168.30.2...
[INFO] [X300] X300 initialization sequence...
[INFO] [X300] Maximum frame size: 8000 bytes.
[INFO] [GPS] Found an internal GPSDO: LC_XO, Firmware Rev 0.929a
[INFO] [X300] Radio 1x clock: 200 MHz
Using Device: Single USRP:
Device: X-Series Device
Mboard 0: X310
RX Channel: 0
RX DSP: 0
RX Dboard: A
RX Subdev: UBX RX
RX Channel: 1
RX DSP: 1
RX Dboard: B
RX Subdev: UBX RX
TX Channel: 0
TX DSP: 0
TX Dboard: A
TX Subdev: UBX TX
TX Channel: 1
TX DSP: 1
TX Dboard: B
TX Subdev: UBX TX
[00:00:03.351625101] Setting device timestamp to 0...
[WARNING] [0/Radio#0] Attempting to set tick rate to 0. Skipping.
Setting TX spp to 1996
[00:00:03.354355919] Testing transmit rate 1.000000 Msps on 1 channels
[00:00:33.473151517] Benchmark complete.
Benchmark rate summary:
Num received samples: 0
Num dropped samples: 0
Num overruns detected: 0
Num transmitted samples: 30117644
Num sequence errors (Tx): 0
Num sequence errors (Rx): 0
Num underruns detected: 0
Num late commands: 0
Num timeouts (Tx): 0
Num timeouts (Rx): 0
Done!
```
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