Hi All, I am using MCX516A-CCAT for X410 USRP. It has three network ports, two for 100Gb QSFP and one for 1Gb ethernet. They are directly connected to host. Surprisingly, I find much bigger latency on the 100Gb link than the 1Gb link when ping them. I didn't notice this before. Then I checked X310. Its latency is also pretty big compared to the 1Gb port: rtt min/avg/max/mdev = 0.341/0.539/0.793/0.187 ms Why is the latency in 100Gb bigger than 1Gb port? ~$ uhd_find_devices[INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400; DPDK_21.11; UHD_4.5.0.0-0-g471af98f---------------------------------------------------- UHD Device 0--------------------------------------------------Device Address: serial: 3289B23 addr: 192.168.20.2 claimed: False fpga: CG_400 mgmt_addr: 192.168.10.2 mgmt_addr: 192.168.20.2 mgmt_addr: 192.168.6.66 name: ni-x4xx-3289B23 product: x410 type: x4xx ~$ ping 192.168.10.2PING 192.168.10.2 (192.168.10.2) 56(84) bytes of data.64 bytes from 192.168.10.2: icmp_seq=1 ttl=64 time=0.998 ms64 bytes from 192.168.10.2: icmp_seq=2 ttl=64 time=0.888 ms64 bytes from 192.168.10.2: icmp_seq=3 ttl=64 time=0.886 ms64 bytes from 192.168.10.2: icmp_seq=4 ttl=64 time=0.894 ms^C--- 192.168.10.2 ping statistics ---4 packets transmitted, 4 received, 0% packet loss, time 3036msrtt min/avg/max/mdev = 0.886/0.916/0.998/0.047 ms~$ ping 192.168.6.66PING 192.168.6.66 (192.168.6.66) 56(84) bytes of data.64 bytes from 192.168.6.66: icmp_seq=1 ttl=64 time=0.180 ms64 bytes from 192.168.6.66: icmp_seq=2 ttl=64 time=0.143 ms64 bytes from 192.168.6.66: icmp_seq=3 ttl=64 time=0.115 ms64 bytes from 192.168.6.66: icmp_seq=4 ttl=64 time=0.119 ms^C--- 192.168.6.66 ping statistics ---4 packets transmitted, 4 received, 0% packet loss, time 3080msrtt min/avg/max/mdev = 0.115/0.139/0.180/0.025 ms
Thanks,H.
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