ACK: [SRU] [N/O/OEM-6.11] [PATCH 0/1] Fix ethernet performance on JSL and EHL

[Guoqing Jiang]

On 8/26/24 16:05, Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/2077858
>
> [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.
>
> Kai-Heng Feng (1):
>    intel_idle: Disable promotion to C1E on Jasper Lake and Elkhart Lake
>
>   drivers/idle/intel_idle.c | 14 ++++++++++++--
>   1 file changed, 12 insertions(+), 2 deletions(-)

Acked-by: Guoqing Jiang <guoqing.jiang at canonical.com>