运行iptables时10GbE网卡吞吐量异常降低求助

各位大佬，我最近碰到个头疼的问题：当iptables处于运行状态时，我的10GbE网卡吞吐量直接掉到了1.5Gbits/sec左右，完全达不到硬件该有的性能，实在摸不着头绪，想请教下大家有没有排查方向或者解决办法？

我的系统环境如下：

• 系统：Gentoo Linux，内核版本6.6.21
• CPU：Intel Xeon E5-1650v4

下面是我用iperf3做的测试输出：

~#@❯ iperf3 -c 192.168.0.12
Connecting to host 192.168.0.12, port 5201
[  5] local 192.168.0.11 port 57756 connected to 192.168.0.12 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   180 MBytes  1.51 Gbits/sec    0    426 KBytes
[  5]   1.00-2.00   sec   180 MBytes  1.51 Gbits/sec    0    426 KBytes
[  5]   2.00-3.00   sec   180 MBytes  1.51 Gbits/sec    0    426 KBytes
[  5]   3.00-4.00   sec   181 MBytes  1.52 Gbits/sec    0    426 KBytes
[  5]   4.00-5.00   sec   182 MBytes  1.53 Gbits/sec    0    426 KBytes
[  5]   5.00-6.00   sec   184 MBytes  1.55 Gbits/sec    0    426 KBytes
[  5]   6.00-7.00   sec   180 MBytes  1.51 Gbits/sec    0    426 KBytes
[  5]   7.00-8.00   sec   180 MBytes  1.51 Gbits/sec    0    426 KBytes
[  5]   8.00-9.00   sec   180 MBytes  1.51 Gbits/sec    0    ...

备注：内容来源于stack exchange，提问作者Daniel Mann