intel x520 网卡收发速度不一致，帮分析分析

[lifavor]

基本信息：

状态 1

PC: TL-NT521 aqc107 电口 RJ45 超六线

NAS: TL-NT521F aqc107 光口，dac 铜缆

交换机：QSW-M2108R-2C 威联通

主板插槽：pcie 3.0*4 (x16 插槽，b660m 迫击炮第三槽)

PC 与 NAS 使用 iperf3 测速一切正常

状态 2 只换 NAS 网卡

NAS: intel x520 光口，dac 铜缆，读 10G, 写 3G 左右

NAS: intel x520 光口，双 LC intel 兼容光模块，读 10G, 写 3G 左右

PS:之前咸鱼买了张 x520 以为有问题，退了，现在又从淘宝买了个拆机卡，还是这样

怀疑点：交换机有问题，光模块有问题，unraid 系统与 x520 兼容性，各位老铁分析分析

E:\iperf-3.1.3-win64>iperf3.exe -c 192.168.50.113 -R
Connecting to host 192.168.50.113, port 5201
Reverse mode, remote host 192.168.50.113 is sending
[  4] local 192.168.50.242 port 9307 connected to 192.168.50.113 port 5201
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-1.00   sec  1.02 GBytes  8.76 Gbits/sec
[  4]   1.00-2.00   sec  1.02 GBytes  8.80 Gbits/sec
[  4]   2.00-3.00   sec  1.02 GBytes  8.77 Gbits/sec
[  4]   3.00-4.00   sec  1.03 GBytes  8.89 Gbits/sec
[  4]   4.00-5.00   sec  1.01 GBytes  8.71 Gbits/sec
[  4]   5.00-6.00   sec  1.01 GBytes  8.66 Gbits/sec
[  4]   6.00-7.00   sec  1.02 GBytes  8.79 Gbits/sec
[  4]   7.00-8.00   sec  1.04 GBytes  8.89 Gbits/sec
[  4]   8.00-9.00   sec  1.01 GBytes  8.68 Gbits/sec
[  4]   9.00-10.00  sec  1.02 GBytes  8.74 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-10.00  sec  10.2 GBytes  8.77 Gbits/sec    3             sender
[  4]   0.00-10.00  sec  10.2 GBytes  8.77 Gbits/sec                  receiver

iperf Done.

E:\iperf-3.1.3-win64>iperf3.exe -c 192.168.50.113
Connecting to host 192.168.50.113, port 5201
[  4] local 192.168.50.242 port 9311 connected to 192.168.50.113 port 5201
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-1.00   sec   384 MBytes  3.22 Gbits/sec
[  4]   1.00-2.01   sec   340 MBytes  2.81 Gbits/sec
[  4]   2.01-3.00   sec   346 MBytes  2.94 Gbits/sec
[  4]   3.00-4.00   sec   322 MBytes  2.70 Gbits/sec
[  4]   4.00-5.00   sec   378 MBytes  3.17 Gbits/sec
[  4]   5.00-6.00   sec   302 MBytes  2.53 Gbits/sec
[  4]   6.00-7.00   sec   441 MBytes  3.70 Gbits/sec
[  4]   7.00-8.00   sec   493 MBytes  4.14 Gbits/sec
[  4]   8.00-9.00   sec   352 MBytes  2.95 Gbits/sec
[  4]   9.00-10.00  sec   348 MBytes  2.92 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-10.00  sec  3.62 GBytes  3.11 Gbits/sec                  sender
[  4]   0.00-10.00  sec  3.62 GBytes  3.11 Gbits/sec                  receiver

[bobryjosin]

我的情况差不多，用 dac 直连 iperf3 多线程测速有时候单向能到满速，上传只能到 3-4Gbps 左右，有时候双向都是 5.9Gbps ，esxi 和 pve 下或者裸装 Ubuntu 都这样卡插到 x16 的槽位上也一样，感觉就是 x520 的问题

[lifavor]

@bobryjosin 试了一下，多线程写能打满到 9.25 Gb （算 10 吧），这样来看还是这张卡的策略问题。6.18 弄张 x710 玩玩

```
E:\iperf-3.1.3-win64>iperf3.exe -c 192.168.50.113 -P 5 -t 2
Connecting to host 192.168.50.113, port 5201
[ 4] local 192.168.50.242 port 11656 connected to 192.168.50.113 port 5201
[ 6] local 192.168.50.242 port 11657 connected to 192.168.50.113 port 5201
[ 8] local 192.168.50.242 port 11658 connected to 192.168.50.113 port 5201
[ 10] local 192.168.50.242 port 11659 connected to 192.168.50.113 port 5201
[ 12] local 192.168.50.242 port 11660 connected to 192.168.50.113 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 209 MBytes 1.75 Gbits/sec
[ 6] 0.00-1.00 sec 220 MBytes 1.84 Gbits/sec
[ 8] 0.00-1.00 sec 225 MBytes 1.89 Gbits/sec
[ 10] 0.00-1.00 sec 233 MBytes 1.95 Gbits/sec
[ 12] 0.00-1.00 sec 225 MBytes 1.89 Gbits/sec
[SUM] 0.00-1.00 sec 1.08 GBytes 9.32 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ 4] 1.00-2.00 sec 248 MBytes 2.08 Gbits/sec
[ 6] 1.00-2.00 sec 247 MBytes 2.07 Gbits/sec
[ 8] 1.00-2.00 sec 209 MBytes 1.76 Gbits/sec
[ 10] 1.00-2.00 sec 187 MBytes 1.57 Gbits/sec
[ 12] 1.00-2.00 sec 204 MBytes 1.71 Gbits/sec
[SUM] 1.00-2.00 sec 1.07 GBytes 9.19 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-2.00 sec 457 MBytes 1.92 Gbits/sec sender
[ 4] 0.00-2.00 sec 457 MBytes 1.92 Gbits/sec receiver
[ 6] 0.00-2.00 sec 467 MBytes 1.96 Gbits/sec sender
[ 6] 0.00-2.00 sec 467 MBytes 1.96 Gbits/sec receiver
[ 8] 0.00-2.00 sec 434 MBytes 1.82 Gbits/sec sender
[ 8] 0.00-2.00 sec 434 MBytes 1.82 Gbits/sec receiver
[ 10] 0.00-2.00 sec 420 MBytes 1.76 Gbits/sec sender
[ 10] 0.00-2.00 sec 419 MBytes 1.76 Gbits/sec receiver
[ 12] 0.00-2.00 sec 429 MBytes 1.80 Gbits/sec sender
[ 12] 0.00-2.00 sec 429 MBytes 1.80 Gbits/sec receiver
[SUM] 0.00-2.00 sec 2.15 GBytes 9.25 Gbits/sec sender
[SUM] 0.00-2.00 sec 2.15 GBytes 9.25 Gbits/sec receiver

iperf Done.
```

[fastcache]

aqc107 有兼容性问题，大坑，只有跟 aqc 之间才能跑满，两端都是 intel 或其他厂家没事

[lifavor]

@fastcache 我这中间加的有交换机。你单线程就能跑满？

[fastcache]

# aqc107 - switch - aqc107 ，intel - switch - intel , SMB copy 大文件，能跑满。
# 一年多前的项目，客户买了几百块 aqc107 给 win10 用，反复测试 aqc107 在 win 下有问题，升级固件，换 n 个版本的驱动，都没用，服务器都不是 aqc ，后来跟网卡厂家协商加钱换了 intel 。
# apple mac ，synology 都用过 aqc107 ，darwin/linux 好像没问题，新的芯片升级为 aqc113 ，没用过...

[lifavor]

@fastcache

微软和 intel 穿一条裤子，兼容性在 win 上确实更好一些。我目前用 aqc 107 就一个问题，打游戏丢包，本来很开心的换了万兆，smb 对拷 10 几 G 大文件都是 1.0+ GB/S ，没有出过问题。我过年（天冷，应该不是发热问题）特地用吃鸡游戏测试，每隔半小时必掉线一次，不知道咋回事，游戏的话可能 udp 包多，我发现现在的 8125BG 也丢包，一会就要连接一次，就板载的 221 这种 1g 的不丢包，诡异。过几天我用 iperf3 udp 再试一次

x520 我在 2 楼多线程能打满，感觉还是网卡设置的策略问题。晚上翻 b 站又看的一条视频，说时 [中断节流] 的概念，x520 老卡，pcie 也是 2.0*8 的，大概估计是为了降低服务器 cpu 压力。

[ref] 中断节流，b 站视频在第 27 秒
https://www.intel.cn/content/www/cn/zh/support/articles/000005593/ethernet-products.html
https://www.bilibili.com/video/BV12v411T7fW/?spm_id_from=333.337.search-card.all.click&vd_source=034e0c0cb9efcd3f60845338ac926d59