Subject: Re: [PATCH net-next 6/6] net_sched: act: remove spinlock in fast path

From: Alexei Starovoitov <[email-masked]>
Date: Thu, 02 Jul 2015 10:13:22 -0700

On 7/2/15 6:07 AM, Eric Dumazet wrote:
> Final step for gact RCU operation :
>
> 1) Use percpu stats
> 2) update lastuse only every clock tick
> 3) Remove spinlock acquisition, as it is no longer needed.
>
> Since this is the last contended lock in packet RX when tc gact is used,
> this gives impressive gain.
>
> My host with 8 RX queues was handling 5 Mpps before the patch,
> and more than 10 Mpps after patch.
>
> Signed-off-by: Eric Dumazet<[email-masked]>

Great stuff. Thank you for fixing it!

Acked-by: Alexei Starovoitov <[email-masked]>