千兆局域网接收/传输速度不对等的问题

This topic created in 1767 days ago, the information mentioned may be changed or developed.

今天遇到了一个奇怪的问题,局域网内用 iperf 对另一台机器测速,发现单边差不多能跑 950M,反向确只能跑到 700 多 M,有没有大神能帮忙解惑。一台是 linux ，一台是 windows ，千兆组网以下是 iperf 输出：

windows->linux

[ ID] Interval Transfer Bandwidth

[ 4] 0.00-1.00 sec 111 MBytes 929 Mbits/sec

[ 4] 1.00-2.00 sec 112 MBytes 942 Mbits/sec

[ 4] 2.00-3.00 sec 112 MBytes 942 Mbits/sec

[ 4] 3.00-4.00 sec 112 MBytes 942 Mbits/sec

[ 4] 4.00-5.00 sec 112 MBytes 942 Mbits/sec

[ 4] 5.00-6.00 sec 112 MBytes 942 Mbits/sec

[ 4] 6.00-7.00 sec 112 MBytes 941 Mbits/sec

[ 4] 7.00-8.00 sec 112 MBytes 942 Mbits/sec

[ 4] 8.00-9.00 sec 112 MBytes 941 Mbits/sec

[ 4] 9.00-10.00 sec 112 MBytes 937 Mbits/sec

[ ID] Interval Transfer Bandwidth

[ 4] 0.00-10.00 sec 1.09 GBytes 940 Mbits/sec sender

[ 4] 0.00-10.00 sec 1.09 GBytes 940 Mbits/sec receiver

linux->windows

[ ID] Interval Transfer Bandwidth

[ 4] 0.00-1.00 sec 88.2 MBytes 740 Mbits/sec

[ 4] 1.00-2.00 sec 90.0 MBytes 755 Mbits/sec

[ 4] 2.00-3.00 sec 90.6 MBytes 760 Mbits/sec

[ 4] 3.00-4.00 sec 90.1 MBytes 756 Mbits/sec

[ 4] 4.00-5.00 sec 89.3 MBytes 749 Mbits/sec

[ 4] 5.00-6.00 sec 90.0 MBytes 755 Mbits/sec

[ 4] 6.00-7.00 sec 90.5 MBytes 759 Mbits/sec

[ 4] 7.00-8.00 sec 90.0 MBytes 755 Mbits/sec

[ 4] 8.00-9.00 sec 88.8 MBytes 745 Mbits/sec

[ 4] 9.00-10.00 sec 89.1 MBytes 748 Mbits/sec

[ ID] Interval Transfer Bandwidth Retr

[ 4] 0.00-10.00 sec 900 MBytes 755 Mbits/sec 0 sender

[ 4] 0.00-10.00 sec 897 MBytes 752 Mbits/sec receiver

Supplement 1 · Jan 7, 2022

相似情况:
https://blog.gloriousdays.pw/2020/07/20/intel-i219-lm-performance-issue-and-mitigation/

Supplement 2 · Jan 7, 2022

https://re-ra.xyz/%E5%86%85%E7%BD%91%E5%B8%A6%E5%AE%BD%E8%B0%83%E4%BC%98%E5%B0%8F%E8%AE%B0/

Supplement 3 · Jan 7, 2022

结帖,是 linux 这台服务器的网卡在当前内核下有 bug,按照 append 里的文章里说的 sudo ethtool -K eno1 tso off gso off

就可以跑满了

[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 110 MBytes 924 Mbits/sec
[ 4] 1.00-2.00 sec 111 MBytes 933 Mbits/sec
[ 4] 2.00-3.00 sec 112 MBytes 939 Mbits/sec
[ 4] 3.00-4.00 sec 111 MBytes 935 Mbits/sec
[ 4] 4.00-5.00 sec 109 MBytes 912 Mbits/sec
[ 4] 5.00-6.00 sec 112 MBytes 941 Mbits/sec
[ 4] 6.00-7.00 sec 112 MBytes 942 Mbits/sec
[ 4] 7.00-8.00 sec 112 MBytes 940 Mbits/sec
[ 4] 8.00-9.00 sec 112 MBytes 941 Mbits/sec
[ 4] 9.00-10.00 sec 112 MBytes 942 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 1.09 GBytes 937 Mbits/sec 0 sender
[ 4] 0.00-10.00 sec 1.09 GBytes 935 Mbits/sec receiver

13 replies • 2022-01-07 18:39:55 +08:00