[Intel-wired-lan] Slow e1000e Network Interface with different kernel
Sasha Neftin
sasha.neftin at intel.com
Thu Sep 2 10:28:36 UTC 2021
On 9/2/2021 13:01, Marco Witte wrote:
> Scenario: Plugin into network, establishes link and IP is assigned.
> scp from another machine in the same subnet gives approx. 1kb/sec.
> Cross check with an usb 3 dock with integrated network adapter. Full speed.
>
> Kai Heng-Feng build a patch for tgp https://lkml.org/lkml/2021/7/12/2927
> His deb kernel packages with that patch based on 5.10.x kernel ran full
> throttle on this machine.
> However this was the only successfull attempt to get full speed.
>
> The Kernel Mainline 5.13. contains visual similar patches, but they
> still have the slow down on the same machine.
> Some people suspect pcie changes at that point.
>
> Some curious fact I found out while testing: I booted up a manjaro
> (current) usb stick and had full speed on the e1000e. Then I installed
> manjaro from that stick to the harddrive. Booted that and it didn't
> perform well.
>
> As this is my first rodeo on this mailinglist, I need to reference some
> information:
>
> Referencing: https://bugzilla.kernel.org/show_bug.cgi?id=213377
> Here is the launchpad:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1927925
> e1000e Sourceforge bugreport(s): https://sourceforge.net/p/e1000/bugs/681/
> This is still an issue with all current mainline kernels. Last test was
> 5.14 RC7
>
> I can provide any output you need.
>
Marco,
Run echo on > /sys/bus/pci/devices/0000\:00\:16.0/power/control command
on your machine.
Please, let us know the result.
>
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Sasha
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