On 04/24/2018 08:07 AM, Yafang Shao wrote:
> This reverts commit <c6849a3ac17e> ("net: init sk_cookie for inet socket")
>
> Per discussion with Eric, when update sock_net(sk)->cookie_gen, the
> whole cache cache line will be invalidated, as this cache line is shared
> with all cpus, that may cause great performace hit.
>
> Bellow is the data form Eric.
> "Performance is reduced from ~5 Mpps to ~3.8 Mpps with 16 RX queues on
> my host" when running synflood test.
>
> Have to revert it to prevent from cache line false sharing.
>
> Signed-off-by: Yafang Shao <[email protected]>
Reviewed-by: Eric Dumazet <[email protected]>
Thanks !
