Hi,
I'm using usrp N321 to sample data at IQ rate of 250 MSPS.
I have dropped packets.
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sync; sudo nice -n -20 /usr/lib/uhd/examples/rx_samples_to_file --freq 1e9
--rate 250e6 --file /media/data/data10.dat --args "addr=192.168.10.2"
Creating the usrp device with: addr=192.168.10.2...
[INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400;
UHD_4.6.0.0-0ubuntu1~jammy1
[INFO] [MPMD] Initializing 1 device(s) in parallel with args:
mgmt_addr=192.168.10.2,type=n3xx,product=n320,serial=32AC3CE,name=ni-n3xx-32AC3CE,fpga=XG,claimed=False,addr=192.168.10.2
[INFO] [MPM.PeriphManager] init() called with device args
`fpga=XG,mgmt_addr=192.168.10.2,name=ni-n3xx-32AC3CE,product=n320,clock_source=internal,time_source=internal'.
Using Device: Single USRP:
Device: N300-Series Device
Mboard 0: n320
RX Channel: 0
RX DSP: 0
RX Dboard: A
RX Subdev: Rhodium
RX Channel: 1
RX DSP: 1
RX Dboard: B
RX Subdev: Rhodium
TX Channel: 0
TX DSP: 0
TX Dboard: A
TX Subdev: Rhodium
TX Channel: 1
TX DSP: 1
TX Dboard: B
TX Subdev: Rhodium
Setting RX Rate: 250.000000 Msps...
Actual RX Rate: 245.760000 Msps...
Setting RX Freq: 1000.000000 MHz...
Setting RX LO Offset: 0.000000 MHz...
[WARNING] [MULTI_USRP] Could not set RX rate to 250.000 MHz. Actual rate is
245.760 MHz
[WARNING] [MULTI_USRP] Could not set RX rate to 250.000 MHz. Actual rate is
245.760 MHz
Actual RX Freq: 1000.000000 MHz...
[INFO] [MPM.Rhodium-0] init() called with args
`fpga=XG,mgmt_addr=192.168.10.2,name=ni-n3xx-32AC3CE,product=n320,clock_source=internal,time_source=internal'
[INFO] [MPM.Rhodium-1] init() called with args
`fpga=XG,mgmt_addr=192.168.10.2,name=ni-n3xx-32AC3CE,product=n320,clock_source=internal,time_source=internal'
Locking LO on channel 0
Waiting for "lo_locked": ++++++++++ locked.
Press Ctrl + C to stop streaming...
Disk write test indicates that an overflow is likely to occur.
Your write medium must sustain a rate of 983.040MB/s,
but write test returned write speed of 346.000MB/s.
The disk write rate is also affected by system load
and OS/disk caching capacity.
OGot an overflow indication. Please consider the following:
Your write medium must sustain a rate of 983.040MB/s.
Dropped samples will not be written to the file.
Please modify this example for your purposes.
This message will not appear again.
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Done!
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Host PC: Intel NUC - NUC11TNHi7
Ubuntu 22.04
Linux kernel version - 6.5.0
we have separate HDs for OS (SATA 2.5'') and storage (fast SSD NVME)
we are using QNA-T310G1S as adapter SFP <--> Thunderbolt.
we tried the following (from
https://kb.ettus.com/USRP_Host_Performance_Tuning_Tips_and_Tricks and
https://kb.ettus.com/Getting_Started_with_DPDK_and_UHD):
* CPU Governor (CPU governor to performance for all cores)
* Adjust Network Buffers
* Adjust Ethernet MTU (the MTU is 9000)
* Increasing Ring Buffers
* Increasing num_recv_frames (num_recv_frames=512)
* Extra nice Priority (sudo nice -n -20)
Can we use dpdk with QNAP? what is the 'dpdk_mac' than?
Thanks,
David Stanley
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