[Bug 272461] Very low throughput mellanox arm64 Azure

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From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 19 Jul 2023 07:14:59 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272461

--- Comment #2 from schakrabarti@microsoft.com <schakrabarti@microsoft.com> ---
# nuttcp -r 10.0.0.6
11183.5827 MB /  10.00 sec = 9377.7762 Mbps 12 %TX 99 %RX 0 retrans 0.94 msRTT
# nuttcp -t 10.0.0.6
 7382.5625 MB /  10.01 sec = 6189.0401 Mbps 88 %TX 23 %RX 1272 host-retrans
1.09 msRTT
# nuttcp -t 10.0.0.6
 7165.5625 MB /  10.01 sec = 6007.3615 Mbps 95 %TX 22 %RX 932 host-retrans 1.24
msRTT
# nuttcp -t 10.0.0.6
 7328.3125 MB /  10.01 sec = 6143.3396 Mbps 97 %TX 23 %RX 1128 host-retrans
0.89 msRTT
# nuttcp -r 10.0.0.6
11282.3515 MB /  10.00 sec = 9461.1586 Mbps 12 %TX 99 %RX 0 retrans 1.07 msRTT

# ifconfig
lo0: flags=1008049<UP,LOOPBACK,RUNNING,MULTICAST,LOWER_UP> metric 0 mtu 16384
        options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
        inet 127.0.0.1 netmask 0xff000000
        inet6 ::1 prefixlen 128
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
        groups: lo
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
hn0: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0
mtu 1500
        options=0
        ether 60:45:bd:c7:5b:6a
        inet 10.0.0.4 netmask 0xffffff00 broadcast 10.0.0.255
        media: Ethernet 100GBase-CR4 <full-duplex,rxpause,txpause>
        status: active
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
mce0: flags=1008a43<UP,BROADCAST,RUNNING,ALLMULTI,SIMPLEX,MULTICAST,LOWER_UP>
metric 0 mtu 1500
       
options=18a05ab<RXCSUM,TXCSUM,VLAN_MTU,JUMBO_MTU,VLAN_HWCSUM,TSO4,LRO,NV,LINKSTATE,HWSTATS,TXRTLMT>
        ether 60:45:bd:c7:5b:6a
        media: Ethernet 100GBase-CR4 <full-duplex,rxpause,txpause>
        status: active
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
# uname -a
FreeBSD lisa--523-e0-n0 14.0-CURRENT FreeBSD 14.0-CURRENT #0
main-n263986-4631191c8a5f: Fri Jul 14 09:03:58 UTC 2023    
root@fbsd13-nvme-test:/data/ws/obj/data/ws/main/arm64.aarch64/sys/GENERIC-NODEBUG
arm64
#

The nuttcp server was running on Ubuntu X86 on same subnet in Azure.

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