Ubuntu 20.04 and slow speedtest-cli

[Jerry Geis]

On Wed, Dec 13, 2023 at 1:42 PM Jerry Geis <jerry.geis at gmail.com> wrote:

> I run speedtest-cli and only get 34Mbit/s - my connection should be like
> 1G or close to it.
>
> This is on a NUC-i3
> lspci
> 00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (10)
> I219-V
>
> uname -a
> 5.15.0-89-generic #99-Ubuntu SMP Mon Oct 30 20:42:41 UTC 2023 x86_64
> x86_64 x86_64 GNU/Linux
>
> ethtool eno1 shows
>  Speed: 1000Mb/s
>
> On another laptop on the network I get speedtest.net of 932M
>
> Why is the NUC-i3 so slow on the network? It supposed to be a 1G network
> interface.
>
> Thanks
>
> Jerry
>
>
HEY - I found this "intel_iommu=off" and it makes a HUGE difference.

BEFORE   AFTER
68     489
13M   489M
83M   454
30M   418

those are three different machines - two are 22.04 and one is 20.04
combination of dell server and NUC-i3 and NUC5C machines.

FYI


jerry
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