Public bug reported:
[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.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-oem-6.11 (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Noble)
Importance: Undecided
Status: New
** Affects: linux-oem-6.11 (Ubuntu Noble)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Oracular)
Importance: Undecided
Status: New
** Affects: linux-oem-6.11 (Ubuntu Oracular)
Importance: Undecided
Status: New
** Tags: jinju oem-priority originate-from-2071431
** Also affects: linux (Ubuntu Noble)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Oracular)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.11 (Ubuntu)
Importance: Undecided
Status: New
** Tags added: jinju oem-priority originate-from-2071431
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https://bugs.launchpad.net/bugs/2077858
Title:
Fix ethernet performance on JSL and EHL
Status in HWE Next:
New
Status in linux package in Ubuntu:
New
Status in linux-oem-6.11 package in Ubuntu:
New
Status in linux source package in Noble:
New
Status in linux-oem-6.11 source package in Noble:
New
Status in linux source package in Oracular:
New
Status in linux-oem-6.11 source package in Oracular:
New
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
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