netdev - Re: [PATCH 2/2] net: Use Toeplitz for IPv4 and IPv6 connection hashing

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Date:	Mon, 23 Sep 2013 16:11:15 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	Tom Herbert <therbert@...gle.com>
Cc:	davem@...emloft.net, netdev@...r.kernel.org,
	jesse.brandeburg@...el.com
Subject: Re: [PATCH 2/2] net: Use Toeplitz for IPv4 and IPv6 connection
 hashing

On Mon, 23 Sep 2013 15:44:51 -0700 (PDT)
Tom Herbert <therbert@...gle.com> wrote:

> Toeplitz
>   IPv4
>     58.72% CPU utilization
>     110/146/198 90/95/99% latencies
>     1.72549e+06 tps
>   IPv6
>     72.38% CPU utilization
>     117/168/255 90/95/99% latencies
>     1.58545e+06 tps
> 
> Jhash
>   IPv4
>     57.67% CPU utilization
>     111/146/196 90/95/99% latencies
>     1.71574e+06 tps
>   IPv6
>     71.84% CPU utilization
>     117/166/248 90/95/99% latencies
>     1.59359e+06 tps

It looks slower and more complex than Jhash, what is the benefit?
Have you investigated using Murmur instead?
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