13.06.2022 21:25, Mike Jakubik пишет:
Hello,I have two new servers with a Mellnox ConnectX-6 card linked at 25Gb/s, however, I am unable to get much more than 6Gb/s when testing with iperf3.The servers are Lenovo SR665 (2 x AMD EPYC 7443 24-Core Processor, 256 GB RAM, Mellanox ConnectX-6 Lx 10/25GbE SFP28 2-port OCP Ethernet Adapter)They are connected to a Dell N3224PX-ON switch. Both servers are idle and not in use, with a fresh install of stable/13-ebea872f8, nothing running on them except ssh, sendmail, etc.The same exact servers tested on Linux (fedora 34) produced nearly 3x the performance (see attached screenshots), i was able to get a steady 14.6Gb/s rate with nearly 0 retries shown in iperf, the performance on FreeBSD seems to avg at around 6Gbs but it is very sporadic during the iperf run.# ifconfig mce0 mce0: flags=8863<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=ffed07bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6,TXRTLMT,HWRXTSTMP,NOMAP,TXTLS4,TXTLS6,VXLAN_HWCSUM,VXLAN_HWTSO,TXTLS_RTLMT> ether b8:ce:f6:81:df:6a inet 192.168.10.31 netmask 0xffffff00 broadcast 192.168.10.255 media: Ethernet 25GBase-CR <full-duplex,rxpause,txpause> status: active nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
Hi, Do you have the same MTU size on linux machine? -- WBR, Andrey V. Elsukov
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