CPU C 状态禁用会破坏网络性能

CPU C 状态禁用会破坏网络性能

intel_idle.max_cstate=1

root@debian:~# curl -o /dev/null http://xx.xx.38.35:999/speedtest/1000mb
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 1000M  100 1000M    0     0  41.1M      0  0:00:24  0:00:24 --:--:-- 41.0M

使用intel_idle.max_cstate=3(下载速度更快):

root@debian:~# curl -o /dev/null http://xx.xx.38.35:999/speedtest/1000mb
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 1000M  100 1000M    0     0  75.9M      0  0:00:13  0:00:13 --:--:-- 76.0M

没有进行 C 状态调整(下载速度几乎没有变化):

root@debian:~# curl -o /dev/null http://xx.xx.38.35:999/speedtest/1000mb
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 1000M  100 1000M    0     0  76.1M      0  0:00:13  0:00:13 --:--:-- 73.4M

知道为什么intel_idle.max_cstate=1网络性能这么差吗?

操作系统:Linux(Debian Buster)
内核版本:尝试过几个,当前为 5.5.17-1~bpo10+1
CPU:Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz(已安装一个)
主板:Quanta S2S-MB
网卡:Mellanox ConnectX-3 EN(MCX341A-XCEN)

相关内容