Re: [RFC PATCH v2] bridge: make it possible for packets to traverse the bridge without hitting netfilter
From: David Miller
Date: Fri Mar 06 2015 - 12:49:42 EST
From: Imre Palik <imrep.amz@xxxxxxxxx>
Date: Fri, 06 Mar 2015 11:34:29 +0100
> Removed those pieces of the packet pipeline that I don't necessarily
> need one-by-one. Then measured their effect on small packet
> performance.
>
> This was the only part that produced considerable effect.
>
> The pure speculation was about why the effect is more than 15%
> increase in packet throughput, although the code path avoided
> contains way less code than 15% of the packet pipeline. It seems,
> Felix Fietkau profiled similar changes, and found my guess well
> founded.
Yes and that's the part being left out, the "why".
That's part of what I expect in the justification.
Look, we're not doing things this way. We need to find a clean
and generic way to make the netfilter hooks as cheap as possible
when netfilter rules are not in use.
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