[f/j/m/n:linux-aws][PATCH 1/1] net: ena: Enable DIM by default

[Andrei Gherzan]

On 24/03/07 01:32PM, Philip Cox wrote:
> From: David Arinzon <darinzon at amazon.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/2056475
> 
> Dynamic Interrupt Moderation (DIM) is a technique
> designed to balance the need for timely data processing
> with the desire to minimize CPU overhead.
> Instead of generating an interrupt for every received
> packet, the system can dynamically adjust the rate at
> which interrupts are generated based on the incoming
> traffic patterns.
> 
> Enabling DIM by default to improve the user experience.
> 
> DIM can be turned on/off through ethtool:
> `ethtool -C <interface> adaptive-rx <on/off>`
> 
> Signed-off-by: Arthur Kiyanovski <akiyano at amazon.com>
> Signed-off-by: Osama Abboud <osamaabb at amazon.com>
> Signed-off-by: David Arinzon <darinzon at amazon.com>
> Signed-off-by: Paolo Abeni <pabeni at redhat.com>
> (cherry picked from net-next commit 50d7a2660579889fba28b7e4543d4ce85aa2311b)

The "cherry picked" line doesn't match the expected format in the docs:

(backported from commit <sha1> <upstream repo name>)

> Signed-off-by: Philip Cox <philip.cox at canonical.com>
> ---
>  drivers/net/ethernet/amazon/ena/ena_netdev.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
> index 1c0a7828d397..adca474828e8 100644
> --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
> +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
> @@ -2134,6 +2134,12 @@ int ena_up(struct ena_adapter *adapter)
>  	 */
>  	ena_init_napi_in_range(adapter, 0, io_queue_count);
>  
> +	/* Enabling DIM needs to happen before enabling IRQs since DIM
> +	 * is run from napi routine
> +	 */
> +	if (ena_com_interrupt_moderation_supported(adapter->ena_dev))
> +		ena_com_enable_adaptive_moderation(adapter->ena_dev);
> +
>  	rc = ena_request_io_irq(adapter);
>  	if (rc)
>  		goto err_req_irq;

-- 
Andrei Gherzan
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: not available
URL: <https://lists.ubuntu.com/archives/kernel-team/attachments/20240318/da948d74/attachment.sig>