This bug is awaiting verification that the linux-azure-
fips/6.8.0-1034.39+fips1 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-azure-fips' to
'verification-done-noble-linux-azure-fips'. If the problem still exists,
change the tag 'verification-needed-noble-linux-azure-fips' to
'verification-failed-noble-linux-azure-fips'.


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-azure-fips-v2 
verification-needed-noble-linux-azure-fips

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-6.11 in Ubuntu.
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.

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