On 11/09/2023 12:09, zhou via USRP-users wrote:
Hi all,
I just set up a system with X410 USRP. Tried to run a benchmark rate
test and saw a lot of errors. Please suggest what could be the reason
for the test failure.
Host is R740 (16 CPU cores) and Linux is Ubuntu 22.04 with low-latency
kernel.
100G Mellanox ConnectX-6 NIC cards
$ sudo /usr/local/lib/uhd/examples/benchmark_rate \
--args
"type=x4xx,mgmt_addr=192.168.88.2,addr=192.168.20.2,master_clock_rate=500e6"
\
--priority "high" \
--multi_streamer \
--duration 60 \
--channels "0" \
--rx_rate 10e6 \
--rx_subdev "A:0" \
--tx_rate 10e6 \
--tx_subdev "A:0"
[sudo] password for user:
[INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400; DPDK_21.11;
UHD_4.4.0.HEAD-0-g5fac246b
[00:00:00.000566] Creating the usrp device with:
type=x4xx,mgmt_addr=192.168.88.2,addr=192.168.20.2,master_clock_rate=500e6...
[INFO] [MPMD] Initializing 1 device(s) in parallel with args:
mgmt_addr=192.168.88.2,type=x4xx,product=x410,serial=3289B23,name=ni-x4xx-3289B23,fpga=CG_400,claimed=False,addr=192.168.20.2,master_clock_rate=500e6
[WARNING] [MPM.RPCServer] A timeout event occured!
[INFO] [MPM.PeriphManager] init() called with device args
`fpga=CG_400,master_clock_rate=500e6,mgmt_addr=192.168.88.2,name=ni-x4xx-3289B23,product=x410,clock_source=internal,time_source=internal'.
Using Device: Single USRP:
Device: X400-Series Device
Mboard 0: x410
RX Channel: 0
RX DSP: n/a
RX Dboard: A
RX Subdev: 0
TX Channel: 0
TX DSP: n/a
TX Dboard: A
TX Subdev: 0
[00:00:05.797505591] Setting device timestamp to 0...
[WARNING] [0/Radio#0] Requesting invalid sampling rate from device: 10
MHz. Actual rate is: 500 MHz.
[WARNING] [MULTI_USRP] Could not set RX rate to 10.000 MHz. Actual
rate is 500.000 MHz
[WARNING] [0/Radio#0] Requesting invalid sampling rate from device: 10
MHz. Actual rate is: 500 MHz.
[WARNING] [MULTI_USRP] Could not set TX rate to 10.000 MHz. Actual
rate is 500.000 MHz
Setting TX spb to 1984
[00:00:05.799789467] Testing receive rate 500.000000 Msps on 1 channels
[00:00:05.801875415] Testing transmit rate 500.000000 Msps on 1 channels
UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUD[U00:00:06.33502762]
Detected Rx sequence error.
UU[D00:00:06.33952517] Detected Rx sequence error.
UUUU[D00:00:06.34387503] Detected Rx sequence error.
U[D00:00:06.34802030] Detected Rx sequence error.
UUUUU[D00:00:06.35212894] Detected Rx sequence error.
U[D00:00:06.35640910] Detected Rx sequence error.
Benchmark rate summary:
Num received samples: 0
Num dropped samples: 0
*Num overruns detected: 596*
Num transmitted samples: 10046501824
Num sequence errors (Tx): 0
Num sequence errors (Rx): 0
*Num underruns detected: 819855*
Num late commands: 0
Num timeouts (Tx): 0
Num timeouts (Rx): 0
Done!
$ ifconfig
enp59s0f0np0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 9000
inet 192.168.20.1 netmask 255.255.255.0 broadcast 192.168.20.255
inet6 fe80::ba3f:d2ff:fe57:b77a prefixlen 64 scopeid 0x20<link>
ether b8:3f:d2:57:b7:7a txqueuelen 1000 (Ethernet)
RX packets 15144837 bytes 101888797100 (101.8 GB)
*/RX errors 0 dropped 2423 overruns 0 frame 0/*
TX packets 12311297 bytes 87947193629 (87.9 GB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp59s0f1np1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 9000
inet 192.168.10.1 netmask 255.255.255.0 broadcast 192.168.10.255
inet6 fe80::ba3f:d2ff:fe57:b77b prefixlen 64 scopeid 0x20<link>
ether b8:3f:d2:57:b7:7b txqueuelen 1000 (Ethernet)
RX packets 406107 bytes 2296309836 (2.2 GB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 502690 bytes 3421432091 (3.4 GB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Kind regards,
Hongwei
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The fact that the actual IP interface is seeing dropped frames indicates
that likely the ringbuf pool on that NIC is too small.
Check out the support that ethtool has for this:
https://www.24x7serversupport.com/blog/how-to-tuneup-tx-and-rx-buffers-on-network-interface/
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