Please run iperf3 -c 127.0.0.1 and post results here to make router database

root@OpenWrt:~# ubus call system board
{
        "kernel": "6.12.87",
        "hostname": "OpenWrt",
        "system": "ARMv7 Processor rev 5 (v7l)",
        "model": "ASUS RT-AC58U",
        "board_name": "asus,rt-ac58u",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "25.12.4",
                "firmware_url": "https://downloads.openwrt.org/",
                "revision": "r32933-4ccb782af7",
                "target": "ipq40xx/generic",
                "description": "OpenWrt 25.12.4 r32933-4ccb782af7",
                "builddate": "1778712129"
        }
}
root@OpenWrt:~# iperf3 -s -D && iperf3 -c 127.0.0.1
Connecting to host 127.0.0.1, port 5201
[  5] local 127.0.0.1 port 52480 connected to 127.0.0.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   162 MBytes  1.36 Gbits/sec    0   1.31 MBytes
[  5]   1.00-2.00   sec   171 MBytes  1.43 Gbits/sec    0   1.31 MBytes
[  5]   2.00-3.00   sec   170 MBytes  1.43 Gbits/sec    0   1.31 MBytes
[  5]   3.00-4.00   sec   163 MBytes  1.37 Gbits/sec    0   1.31 MBytes
[  5]   4.00-5.00   sec   159 MBytes  1.33 Gbits/sec    0   1.31 MBytes
[  5]   5.00-6.00   sec   162 MBytes  1.36 Gbits/sec    0   1.31 MBytes
[  5]   6.00-7.00   sec   146 MBytes  1.22 Gbits/sec    0   1.31 MBytes
[  5]   7.00-8.00   sec   170 MBytes  1.42 Gbits/sec    0   1.31 MBytes
[  5]   8.00-9.00   sec   161 MBytes  1.35 Gbits/sec    0   1.31 MBytes
[  5]   9.00-10.00  sec   168 MBytes  1.41 Gbits/sec    0   1.31 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.66 GBytes  1.42 Gbits/sec    0            sender
[  5]   0.00-10.00  sec  1.66 GBytes  1.42 Gbits/sec                  receiver

iperf Done.

Can you guys tell me what is wrong with this?

root@OpenWrt:~# iperf3 -s -D && iperf3 -c 127.0.0.1 -u -b 100G -R && killall iperf3
Connecting to host 127.0.0.1, port 5201
Reverse mode, remote host 127.0.0.1 is sending
[  5] local 127.0.0.1 port 47699 connected to 127.0.0.1 port 5201
[ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
[  5]   0.00-1.00   sec   892 MBytes  7.47 Gbits/sec  0.016 ms  1069/29608 (3.6%)
[  5]   1.00-2.00   sec   878 MBytes  7.37 Gbits/sec  0.017 ms  2089/30199 (6.9%)
[  5]   2.00-3.00   sec   909 MBytes  7.62 Gbits/sec  0.016 ms  285/29366 (0.97%)
[  5]   3.00-4.00   sec   894 MBytes  7.50 Gbits/sec  0.016 ms  1605/30203 (5.3%)
[  5]   4.00-5.00   sec   919 MBytes  7.71 Gbits/sec  0.018 ms  701/30094 (2.3%)
[  5]   5.00-6.00   sec   901 MBytes  7.56 Gbits/sec  0.018 ms  1188/30028 (4%)
[  5]   6.00-7.00   sec   885 MBytes  7.42 Gbits/sec  0.044 ms  1443/29758 (4.8%)
[  5]   7.00-8.00   sec   897 MBytes  7.53 Gbits/sec  0.014 ms  1095/29809 (3.7%)
[  5]   8.00-9.00   sec   872 MBytes  7.31 Gbits/sec  0.016 ms  2341/30241 (7.7%)
[  5]   9.00-10.00  sec   897 MBytes  7.52 Gbits/sec  0.022 ms  973/29678 (3.3%)
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
[  5]   0.00-10.00  sec  9.13 GBytes  7.84 Gbits/sec  0.000 ms  0/299088 (0%)  sender
[  5]   0.00-10.00  sec  8.73 GBytes  7.50 Gbits/sec  0.022 ms  12789/298984 (4.3%)  receiver

iperf Done.

root@W6x:~# ubus call system board
{
        "kernel": "6.12.87",
        "hostname": "W6x",
        "system": "ARMv8 Processor rev 4",
        "model": "Acer Predator Connect W6x (OpenWrt U-Boot Layout)",
        "board_name": "acer,predator-w6x-ubootmod",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "25.12.4",
                "firmware_url": "https://downloads.openwrt.org/",
                "revision": "r32933-4ccb782af7",
                "target": "mediatek/filogic",
                "description": "OpenWrt 25.12.4 r32933-4ccb782af7",
                "builddate": "1778712129"
        }
}
root@W6x:~# iperf3 -s -D && iperf3 -c 127.0.0.1
Connecting to host 127.0.0.1, port 5201
[  5] local 127.0.0.1 port 58746 connected to 127.0.0.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  1.15 GBytes  9.90 Gbits/sec    0    959 KBytes
[  5]   1.00-2.00   sec  1.01 GBytes  8.65 Gbits/sec    0   1023 KBytes
[  5]   2.00-3.00   sec  1.09 GBytes  9.31 Gbits/sec    0    895 KBytes
[  5]   3.00-4.00   sec  1.07 GBytes  9.19 Gbits/sec    0   1023 KBytes
[  5]   4.00-5.00   sec   911 MBytes  7.64 Gbits/sec    0   1023 KBytes
[  5]   5.00-6.00   sec   898 MBytes  7.54 Gbits/sec    0    895 KBytes
[  5]   6.00-7.00   sec  1.07 GBytes  9.23 Gbits/sec    0    895 KBytes
[  5]   7.00-8.00   sec  1.02 GBytes  8.79 Gbits/sec    0    895 KBytes
[  5]   8.00-9.00   sec   898 MBytes  7.53 Gbits/sec    0    895 KBytes
[  5]   9.00-10.00  sec   953 MBytes  8.00 Gbits/sec    0    895 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  9.99 GBytes  8.58 Gbits/sec    0            sender
[  5]   0.00-10.00  sec  9.99 GBytes  8.58 Gbits/sec                  receiver

iperf Done.
root@OpenWrt1:~# ubus call system board
{
        "kernel": "6.12.87",
        "hostname": "OpenWrt1",
        "system": "ARMv7 Processor rev 0 (v7l)",
        "model": "Buffalo WXR-2533DHP",
        "board_name": "buffalo,wxr-2533dhp",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "25.12.4",
                "firmware_url": "https://downloads.openwrt.org/",
                "revision": "r32933-4ccb782af7",
                "target": "ipq806x/generic",
                "description": "OpenWrt 25.12.4 r32933-4ccb782af7",
                "builddate": "1778712129"
        }
}
root@OpenWrt1:~# iperf3 -s -D && iperf3 -c 127.0.0.1
Connecting to host 127.0.0.1, port 5201
[  5] local 127.0.0.1 port 48052 connected to 127.0.0.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   640 MBytes  5.34 Gbits/sec    0   1.12 MBytes
[  5]   1.00-2.00   sec   644 MBytes  5.42 Gbits/sec    0   1.12 MBytes
[  5]   2.00-3.00   sec   650 MBytes  5.45 Gbits/sec    0   1.12 MBytes
[  5]   3.00-4.00   sec   641 MBytes  5.38 Gbits/sec    0   1.12 MBytes
[  5]   4.00-5.00   sec   645 MBytes  5.41 Gbits/sec    0   1.12 MBytes
[  5]   5.00-6.00   sec   647 MBytes  5.43 Gbits/sec    0   1.12 MBytes
[  5]   6.00-7.00   sec   651 MBytes  5.46 Gbits/sec    0   1.12 MBytes
[  5]   7.00-8.00   sec   635 MBytes  5.33 Gbits/sec    0   1.12 MBytes
[  5]   8.00-9.00   sec   595 MBytes  4.99 Gbits/sec    0   1.12 MBytes
[  5]   9.00-10.00  sec   609 MBytes  5.11 Gbits/sec    0   1.12 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  6.27 GBytes  5.39 Gbits/sec    0            sender
[  5]   0.00-10.00  sec  6.27 GBytes  5.39 Gbits/sec                  receiver

iperf Done.

root@OpenWrt2:~# ubus call system board
{
        "kernel": "6.12.87",
        "hostname": "OpenWrt2",
        "system": "ARMv8 Processor rev 4",
        "model": "OpenWrt One",
        "board_name": "openwrt,one",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "25.12.4",
                "firmware_url": "https://downloads.openwrt.org/",
                "revision": "r32933-4ccb782af7",
                "target": "mediatek/filogic",
                "description": "OpenWrt 25.12.4 r32933-4ccb782af7",
                "builddate": "1778712129"
        }
}
root@OpenWrt2:~# iperf3 -s -D && iperf3 -c 127.0.0.1
Connecting to host 127.0.0.1, port 5201
[  5] local 127.0.0.1 port 47800 connected to 127.0.0.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   454 MBytes  3.80 Gbits/sec    0   5.06 MBytes
[  5]   1.00-2.00   sec   450 MBytes  3.78 Gbits/sec    0   5.06 MBytes
[  5]   2.00-3.00   sec   450 MBytes  3.78 Gbits/sec    0   5.06 MBytes
[  5]   3.00-4.00   sec   451 MBytes  3.79 Gbits/sec    0   5.06 MBytes
[  5]   4.00-5.00   sec   455 MBytes  3.82 Gbits/sec    0   5.06 MBytes
[  5]   5.00-6.00   sec   460 MBytes  3.86 Gbits/sec    0   5.06 MBytes
[  5]   6.00-7.00   sec   458 MBytes  3.84 Gbits/sec    0   5.06 MBytes
[  5]   7.00-8.00   sec   456 MBytes  3.83 Gbits/sec    0   5.06 MBytes
[  5]   8.00-9.00   sec   453 MBytes  3.80 Gbits/sec    0   5.06 MBytes
[  5]   9.00-10.00  sec   456 MBytes  3.83 Gbits/sec    0   5.06 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  4.45 GBytes  3.82 Gbits/sec    0            sender
[  5]   0.00-10.00  sec  4.45 GBytes  3.82 Gbits/sec                  receiver

iperf Done.

root@OpenWrt:~# ubus call system board
{
        "kernel": "6.18.36",
        "hostname": "OpenWrt",
        "system": "ARMv8 Processor rev 4",
        "model": "WatchGuard Firebox T40",
        "board_name": "watchguard,firebox-t40",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "SNAPSHOT",
                "firmware_url": "https://downloads.openwrt.org/",
                "revision": "r35099-1191ea2b74",
                "target": "layerscape/armv8_64b",
                "description": "OpenWrt SNAPSHOT r35099-1191ea2b74",
                "builddate": "1783021831"
        }
}
root@OpenWrt:~# 
root@OpenWrt:~# iperf3 -s -D && iperf3 -c 127.0.0.1
Connecting to host 127.0.0.1, port 5201
[  5] local 127.0.0.1 port 45004 connected to 127.0.0.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   891 MBytes  7.47 Gbits/sec    0   2.44 MBytes       
[  5]   1.00-2.00   sec   949 MBytes  7.96 Gbits/sec    0   2.44 MBytes       
[  5]   2.00-3.00   sec   949 MBytes  7.96 Gbits/sec    0   2.44 MBytes       
[  5]   3.00-4.00   sec   962 MBytes  8.07 Gbits/sec    0   2.44 MBytes       
[  5]   4.00-5.00   sec   961 MBytes  8.06 Gbits/sec    0   2.44 MBytes       
[  5]   5.00-6.00   sec   962 MBytes  8.07 Gbits/sec    0   2.44 MBytes       
[  5]   6.00-7.00   sec   957 MBytes  8.03 Gbits/sec    0   2.44 MBytes       
[  5]   7.00-8.00   sec   958 MBytes  8.03 Gbits/sec    0   2.44 MBytes       
[  5]   8.00-9.00   sec   951 MBytes  7.98 Gbits/sec    0   2.44 MBytes       
[  5]   9.00-10.00  sec   956 MBytes  8.02 Gbits/sec    0   2.44 MBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  9.30 GBytes  7.99 Gbits/sec    0            sender
[  5]   0.00-10.01  sec  9.30 GBytes  7.99 Gbits/sec                  receiver

iperf Done.


root@OpenWrt:~# ubus call system board
{
        "kernel": "6.12.94",
        "hostname": "OpenWrt",
        "system": "ARMv7 Processor rev 5 (v7l)",
        "model": "NETGEAR RBR50",
        "board_name": "netgear,rbr50",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "25.12.5",
                "firmware_url": "https://downloads.openwrt.org/",
                "revision": "r33051-f5dae5ece4",
                "target": "ipq40xx/generic",
                "description": "OpenWrt 25.12.5 r33051-f5dae5ece4",
                "builddate": "1782737960"
        }
}
root@OpenWrt:~# iperf3 -s -D && iperf3 -c 127.0.0.1
Connecting to host 127.0.0.1, port 5201
[  5] local 127.0.0.1 port 58074 connected to 127.0.0.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.01   sec   141 MBytes  1.17 Gbits/sec    0   1.37 MBytes       
[  5]   1.01-2.00   sec   156 MBytes  1.32 Gbits/sec    1   1.44 MBytes       
[  5]   2.00-3.00   sec   161 MBytes  1.35 Gbits/sec    0   1.44 MBytes       
[  5]   3.00-4.00   sec   157 MBytes  1.32 Gbits/sec    0   1.44 MBytes       
[  5]   4.00-5.00   sec   160 MBytes  1.34 Gbits/sec    0   1.44 MBytes       
[  5]   5.00-6.00   sec   161 MBytes  1.35 Gbits/sec    0   1.44 MBytes       
[  5]   6.00-7.00   sec   159 MBytes  1.33 Gbits/sec    0   1.44 MBytes       
[  5]   7.00-8.00   sec   160 MBytes  1.34 Gbits/sec    0   1.44 MBytes       
[  5]   8.00-9.00   sec   159 MBytes  1.33 Gbits/sec    0   1.44 MBytes       
[  5]   9.00-10.00  sec   161 MBytes  1.35 Gbits/sec    0   1.44 MBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.54 GBytes  1.33 Gbits/sec    1            sender
[  5]   0.00-10.00  sec  1.54 GBytes  1.33 Gbits/sec                  receiver

iperf Done.

Two different Linksys routers, they are in different location,
same ISP, 1000Mbps fiber.
but the one with qualcomm is much slower ~~

# cat etc/openwrt_release ;iperf3 -c::1 -p69;speedtest-go
"name": "Linksys MX5500"
DISTRIB_ID='OpenWrt'
DISTRIB_RELEASE='SNAPSHOT'
DISTRIB_REVISION='r35212-57b659c41d'
DISTRIB_TARGET='qualcommax/ipq50xx'
DISTRIB_ARCH='aarch64_cortex-a53'
DISTRIB_DESCRIPTION='OpenWrt SNAPSHOT r35212-57b659c41d'
DISTRIB_TAINTS=''
Connecting to host ::1, port 69
[  5] local ::1 port 54326 connected to ::1 port 69
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   182 MBytes  1.52 Gbits/sec    0   3.56 MBytes
[  5]   1.00-2.00   sec   185 MBytes  1.55 Gbits/sec    0   3.56 MBytes
[  5]   2.00-3.00   sec   173 MBytes  1.45 Gbits/sec    0   3.56 MBytes
[  5]   3.00-4.00   sec   177 MBytes  1.48 Gbits/sec    0   3.56 MBytes
[  5]   4.00-5.00   sec   186 MBytes  1.56 Gbits/sec    0   3.56 MBytes
[  5]   5.00-6.00   sec   188 MBytes  1.58 Gbits/sec    0   3.56 MBytes
[  5]   6.00-7.00   sec   190 MBytes  1.60 Gbits/sec    0   3.56 MBytes
[  5]   7.00-8.00   sec   190 MBytes  1.60 Gbits/sec    0   3.56 MBytes
[  5]   8.00-9.00   sec   193 MBytes  1.62 Gbits/sec    0   3.56 MBytes
[  5]   9.00-10.00  sec   194 MBytes  1.63 Gbits/sec    0   3.56 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.83 GBytes  1.57 Gbits/sec    0            sender
[  5]   0.00-10.00  sec  1.83 GBytes  1.57 Gbits/sec                  receiver

iperf Done.

    speedtest-go v1.7.10 (git-dev) @showwin

βœ“ ISP: x.x.x.243 (xxx) [xx.2908, xx.1501]
βœ“ Found 30 Public Servers

βœ“ Test Server: [653] 4.85km by Akile
βœ“ Latency: 6.015473ms Jitter: 209.484Β΅s Min: 5.724731ms Max: 6.455525ms
βœ“ Packet Loss Analyzer: Running in background (<= 30 Secs)
βœ“ Download: 658.00 Mbps (Used: 814.24MB) (Latency: 16ms Jitter: 14ms Min: 4ms Max: 45ms)
βœ“ Upload: 127.17 Mbps (Used: 151.22MB) (Latency: 9ms Jitter: 6ms Min: 3ms Max: 25ms)
βœ“ Packet Loss: 0.00% (Sent: 223/Dup: 0/Max: 222)

# cat etc/openwrt_release ;iperf3 -c::1 -p69;speedtest-go
"name": "Linksys E8450 (UBI)"
DISTRIB_ID='OpenWrt'
DISTRIB_RELEASE='SNAPSHOT'
DISTRIB_REVISION='r35212-57b659c41d'
DISTRIB_TARGET='mediatek/mt7622'
DISTRIB_ARCH='aarch64_cortex-a53'
DISTRIB_DESCRIPTION='OpenWrt SNAPSHOT r35212-57b659c41d'
DISTRIB_TAINTS=''
Connecting to host ::1, port 69
[  5] local ::1 port 48326 connected to ::1 port 69
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   386 MBytes  3.24 Gbits/sec    0   2.12 MBytes
[  5]   1.00-2.00   sec   376 MBytes  3.15 Gbits/sec    0   2.12 MBytes
[  5]   2.00-3.00   sec   377 MBytes  3.16 Gbits/sec    0   2.37 MBytes
[  5]   3.00-4.00   sec   382 MBytes  3.20 Gbits/sec    0   2.62 MBytes
[  5]   4.00-5.00   sec   383 MBytes  3.22 Gbits/sec    0   3.37 MBytes
[  5]   5.00-6.00   sec   389 MBytes  3.26 Gbits/sec    0   4.56 MBytes
[  5]   6.00-7.00   sec   395 MBytes  3.31 Gbits/sec    0   4.56 MBytes
[  5]   7.00-8.01   sec   394 MBytes  3.29 Gbits/sec    0   4.56 MBytes
[  5]   8.01-9.00   sec   386 MBytes  3.25 Gbits/sec    0   4.56 MBytes
[  5]   9.00-10.00  sec   379 MBytes  3.18 Gbits/sec    0   4.56 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  3.76 GBytes  3.23 Gbits/sec    0            sender
[  5]   0.00-10.00  sec  3.76 GBytes  3.23 Gbits/sec                  receiver

iperf Done.

    speedtest-go v1.7.10 (git-dev) @showwin

βœ“ ISP: x.x.x.191 (xx) [xx.2908, xx.1501]
βœ“ Found 30 Public Servers

βœ“ Test Server: [653] 0.97km (xxx) by Akile
βœ“ Latency: 3.103579ms Jitter: 128.651Β΅s Min: 2.862519ms Max: 3.295486ms
βœ“ Packet Loss Analyzer: Running in background (<= 30 Secs)
βœ“ Download: 900.31 Mbps (Used: 1150.37MB) (Latency: 11ms Jitter: 5ms Min: 2ms Max: 21ms)
βœ“ Upload: 823.28 Mbps (Used: 1020.48MB) (Latency: 8ms Jitter: 2ms Min: 4ms Max: 16ms)
βœ“ Packet Loss: 0.00% (Sent: 268/Dup: 0/Max: 267)

GL-MT6000 with packet steering disabled and irqbalance enabled

root@homelab-router:~# ubus call system board
{
        "kernel": "6.12.94",
        "hostname": "homelab-router",
        "system": "ARMv8 Processor rev 4",
        "model": "GL.iNet GL-MT6000",
        "board_name": "glinet,gl-mt6000",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "25.12.5",
                "firmware_url": "https://downloads.openwrt.org/",
                "revision": "r33051-f5dae5ece4",
                "target": "mediatek/filogic",
                "description": "OpenWrt 25.12.5 r33051-f5dae5ece4",
                "builddate": "1782737960"
        }
}
root@homelab-router:~# iperf3 -s -D && iperf3 -c 127.0.0.1
Connecting to host 127.0.0.1, port 5201
[  5] local 127.0.0.1 port 38688 connected to 127.0.0.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   990 MBytes  8.29 Gbits/sec    0   1.19 MBytes
[  5]   1.00-2.00   sec  1.02 GBytes  8.80 Gbits/sec    0   1.19 MBytes
[  5]   2.00-3.00   sec   867 MBytes  7.27 Gbits/sec    0   1.19 MBytes
[  5]   3.00-4.00   sec  1.00 GBytes  8.59 Gbits/sec    0   1.19 MBytes
[  5]   4.00-5.00   sec  1.09 GBytes  9.34 Gbits/sec    0   1.19 MBytes
[  5]   5.00-6.00   sec  1.01 GBytes  8.64 Gbits/sec    0   4.25 MBytes
[  5]   6.00-7.00   sec   860 MBytes  7.22 Gbits/sec    0   4.25 MBytes
[  5]   7.00-8.00   sec   903 MBytes  7.57 Gbits/sec    0   4.25 MBytes
[  5]   8.00-9.00   sec   844 MBytes  7.08 Gbits/sec    0   4.25 MBytes
[  5]   9.00-10.00  sec   851 MBytes  7.14 Gbits/sec    0   4.25 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  9.31 GBytes  8.00 Gbits/sec    0            sender
[  5]   0.00-10.00  sec  9.30 GBytes  7.99 Gbits/sec                  receiver

iperf Done.
root@OpenWrt:~# ubus call system board
{
        "kernel": "6.6.141",
        "hostname": "OpenWrt",
        "system": "Intel(R) Core(TM) i3-7100 CPU @ 3.90GHz",
        "model": "FUJITSU D3401-H2",
        "board_name": "fujitsu-d3401-h2",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "24.10.7",
                "revision": "r29197-ab4c7d6af7",
                "target": "x86/64",
                "description": "OpenWrt 24.10.7 r29197-ab4c7d6af7",
                "builddate": "1779897308"
        }
}
root@OpenWrt:~# iperf3 -s -D && iperf3 -c 127.0.0.1
Connecting to host 127.0.0.1, port 5201
[  5] local 127.0.0.1 port 48554 connected to 127.0.0.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  6.40 GBytes  54.9 Gbits/sec    0   1.50 MBytes
[  5]   1.00-2.00   sec  6.62 GBytes  56.9 Gbits/sec    0   1.50 MBytes
[  5]   2.00-3.00   sec  6.38 GBytes  54.8 Gbits/sec    0   1.56 MBytes
[  5]   3.00-4.00   sec  6.89 GBytes  59.2 Gbits/sec    0   1.56 MBytes
[  5]   4.00-5.00   sec  7.15 GBytes  61.4 Gbits/sec    0   1.56 MBytes
[  5]   5.00-6.00   sec  6.24 GBytes  53.6 Gbits/sec    0   1.56 MBytes
[  5]   6.00-7.00   sec  6.46 GBytes  55.5 Gbits/sec    0   1.56 MBytes
[  5]   7.00-8.00   sec  5.64 GBytes  48.5 Gbits/sec    0   2.37 MBytes
[  5]   8.00-9.00   sec  7.06 GBytes  60.7 Gbits/sec    0   2.37 MBytes
[  5]   9.00-10.00  sec  6.17 GBytes  53.0 Gbits/sec    0   2.37 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  65.1 GBytes  55.9 Gbits/sec    0             sender
[  5]   0.00-10.00  sec  65.1 GBytes  55.9 Gbits/sec                  receiver

iperf Done.