Issue related to x410

[Benie140902]

I am currently working on X410 and with 61.44 MSPS it is working fine but beyond that sampling rate about 122.88 MSPS and bandwidth of 60 to 100 MHZ i am getting overflow and underflow error what is the issue how it is to be resolved

[improperaffo]

Hi @Benie140902 , this is likely related to your setup. We found that this guide explained well how to setup the host for using the X410. You can skip the amplification part.
Are you using DPDK? We were not able to achieve 100 MHz without DPDK.

[Benie140902]

I have tried with DPDK but there is some error since it is falling back to UDP in N310 previously i was working on X410
The following is the error in console terminal

--== srsRAN gNB (commit ) ==--

The PRACH detector will not meet the performance requirements with the configuration {Format B4, ZCZ 0, SCS 30kHz, Rx ports 1}.
EAL: Detected CPU lcores: 20
EAL: Detected NUMA nodes: 1
EAL: Detected shared linkage of DPDK
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'VA'
EAL: VFIO support initialized
EAL: Using IOMMU type 1 (Type 1)
EAL: Ignore mapping IO port bar(2)
EAL: Probe PCI driver: net_ixgbe (8086:10fb) device: 0000:01:00.1 (socket -1)
TELEMETRY: No legacy callbacks, legacy socket not created
Lower PHY in quad executor mode.
Available radio types: uhd.
[INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400; UHD_4.8.0.0-0-unknown
[INFO] [LOGGING] Fastpath logging disabled at runtime.
Making USRP object with args 'use_dpdk=1,type=n3xx,master_clock_rate=122.88e6,send_frame_size=8000,recv_frame_size=8000'
[INFO] [MPMD] Initializing 1 device(s) in parallel with args: mgmt_addr=192.168.10.2,type=n3xx,product=n310,serial=3332B89,name=ni-n3xx-3332B89,fpga=HG,claimed=False,addr=192.168.10.2,use_dpdk=1,master_clock_rate=122.88e6,send_frame_size=8000,recv_frame_size=8000
[INFO] [MPM.PeriphManager] init() called with device args `fpga=HG,master_clock_rate=122.88e6,mgmt_addr=192.168.10.2,name=ni-n3xx-3332B89,product=n310,recv_frame_size=8000,send_frame_size=8000,use_dpdk=1,clock_source=internal,time_source=internal'.
[WARNING] [MPMD] DPDK was requested but is not available, falling back to regular UDP
[WARNING] [IO_SRV] Cannot instantiate DPDK I/O service. Proceeding with regular I/O service.
[WARNING] [MPMD] Cannot create DPDK transport, falling back to UDP
[WARNING] [MPMD] Cannot create DPDK transport, falling back to UDP
[WARNING] [0/Radio#0] Attempting to set tick rate to 0. Skipping.
[WARNING] [MPMD] Cannot create DPDK transport, falling back to UDP
Cell pci=1, bw=50 MHz, 1T1R, dl_arfcn=632628 (n78), dl_freq=3489.42 MHz, dl_ssb_arfcn=631296, ul_freq=3489.42 MHz

N2: Connection to AMF on 127.0.0.5:38412 completed
==== gNB started ===
Type to view help
Error: failed receiving packet. RfnocError: OpTimeout: Control operation timed out waiting for ACK.
Late: 203; Underflow: 43; Overflow: 1;
Error: failed receiving packet. RfnocError: OpTimeout: Control operation timed out waiting for ACK.
Error: failed receiving packet. RfnocError: OpTimeout: Control operation timed out waiting for ACK.
Error: failed receiving packet. RfnocError: OpTimeout: Control operation timed out waiting for ACK.
Late: 2; Underflow: 0; Overflow: 0;
The following is the config file i use

cell_cfg:
band: 78
channel_bandwidth_MHz: 50
common_scs: 30
dl_arfcn: 632628
pci: 1
plmn: '00101'
tac: 7
cu_cp:
amf:
addr: 127.0.0.5
bind_addr: 127.0.0.1
port: 38412
supported_tracking_areas:
- plmn_list:
- plmn: '00101'
tai_slice_support_list:
- sst: 1
tac: 7
ru_sdr:
#device_args: use_dpdk=1,type=n3xx,mgmt_addr=192.168.10.2,subdev='B:0 B:0'"
device_args: use_dpdk=1,type=n3xx
device_args: type=n3xx
device_driver: uhd
otw_format: sc16
rx_gain: 30
srate: 61.44
tx_gain: 25
clock: internal
sync: internal

the following is the output to check the dpdk is recognising our N310 or not
sudo dpdk-devbind.py -s

Network devices using DPDK-compatible driver

0000:01:00.1 '82599ES 10-Gigabit SFI/SFP+ Network Connection 10fb' drv=vfio-pci unused=ixgbe

Network devices using kernel driver

0000:00:1f.6 'Ethernet Connection (17) I219-LM 1a1c' if=eno1 drv=e1000e unused=vfio-pci Active
0000:01:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection 10fb' if=enp1s0f0 drv=ixgbe unused=vfio-pci
The difference we saw is that the drv=ixgbe is seen in our terminal whereas in the idle case it is EAL: Probe PCI driver: net_bnxt (14e4:1751) device: 0000:18:00.2 (socket 0) show in srsgnb with dpdk reference