netdev - Re: [PATCH 2/2 net-next] net: move qdisc ingress filtering code where it belongs

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Message-ID: <554FC228.2010804@iogearbox.net>
Date:	Sun, 10 May 2015 22:40:08 +0200
From:	Daniel Borkmann <daniel@...earbox.net>
To:	Alexei Starovoitov <ast@...mgrid.com>,
	Pablo Neira Ayuso <pablo@...filter.org>
CC:	netdev@...r.kernel.org, davem@...emloft.net, jhs@...atatu.com
Subject: Re: [PATCH 2/2 net-next] net: move qdisc ingress filtering code where
 it belongs

On 05/10/2015 08:47 PM, Alexei Starovoitov wrote:
...
> You've read the patch in a way that it slows down netif_receive
> _without_ ingress qdisc? Of course, that's not the case.
>
> Here are the number from my box:
> before:
> no ingress - 37.6
> ingress on other dev - 36.5
> ingress on this dev - 28.8
> ingress on this dev + u32 - 24.1
>
> after Daniel's two patches:
> no ingress - 37.6
> ingress on other dev - 36.5
> ingress on this dev - 36.5
> ingress on this dev + u32 - 25.2
>
> so when ingress qdisc is not used, the difference is zero.
> When ingress qdisc is added to another device - difference is zero.
> The last two numbers that we wanted to accelerate and we did.

+1, exactly!
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