[Bug 2077858] Re: Fix ethernet performance on JSL and EHL

This bug is awaiting verification that the linux-
realtime-6.11/6.11.0-1003.3~24.04.2 kernel in -proposed solves the
problem. Please test the kernel and update this bug with the results. If
the problem is solved, change the tag 'verification-needed-noble-linux-
realtime-6.11' to 'verification-done-noble-linux-realtime-6.11'. If the
problem still exists, change the tag 'verification-needed-noble-linux-
realtime-6.11' to 'verification-failed-noble-linux-realtime-6.11'.


If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.


See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: kernel-spammed-noble-linux-realtime-6.11-v2 verification-needed-noble-linux-realtime-6.11

--
You received this bug notification because you are subscribed to linux
in Ubuntu.
Matching subscriptions: Bgg, Bmail, Nb
https://bugs.launchpad.net/bugs/2077858

Title:
Fix ethernet performance on JSL and EHL

Status in HWE Next:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux-oem-6.11 package in Ubuntu:
Invalid
Status in linux source package in Noble:
Fix Released
Status in linux-oem-6.11 source package in Noble:
Invalid
Status in linux source package in Oracular:
Fix Released
Status in linux-oem-6.11 source package in Oracular:
Invalid

Bug description:
[Impact]
Sub-optimal ethernet performance on Intel JSL and EHL platform with
Realtek PCIe NIC.

Iperf shows the network throughput can only reach around 75% of

[Fix]
The CPU idle state transition C1 -> C1E -> C0 overhead can be too high,
so disabling C1E to increase the IRQ latency and DMA speed.

[Test]
With the patch applied, iperf shows over 95% of network throughput
consistently.

[Where problems could occur]
Disabling C1E can theoretically increase power consumption slightly.

To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/2077858/+subscriptions