Re: [PATCH net-next] net: ti: icssg_prueth: Add SW TX / RX Coalescing based on hrtimers

[Andrew Lunn]

On Wed, Apr 24, 2024 at 02:48:23PM +0530, MD Danish Anwar wrote:
> Add SW IRQ coalescing based on hrtimers for RX and TX data path for ICSSG
> driver, which can be enabled by ethtool commands:
> 
> - RX coalescing
>   ethtool -C eth1 rx-usecs 50
> 
> - TX coalescing can be enabled per TX queue
> 
>   - by default enables coalesing for TX0
>   ethtool -C eth1 tx-usecs 50
>   - configure TX0
>   ethtool -Q eth0 queue_mask 1 --coalesce tx-usecs 100
>   - configure TX1
>   ethtool -Q eth0 queue_mask 2 --coalesce tx-usecs 100
>   - configure TX0 and TX1
>   ethtool -Q eth0 queue_mask 3 --coalesce tx-usecs 100 --coalesce
> tx-usecs 100
> 
> Minimum value for both rx-usecs and tx-usecs is 20us.

Do you have some benchmark numbers?

Did you see this patch on the mailing list:

https://lore.kernel.org/all/20240415094804.8016-1-paul.barker.ct@xxxxxxxxxxxxxx/T/#md50cb07bbdd6daf985f3796508cf4b246b085268

This is basically a one line change, which brings big performance
gains. Did you try something as simple as that, rather than all your
hrtimer code?

	Andrew