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From: Alfred Perlstein <bright@mu.org>
Subject: Re: auto tuning tcp
Date: Mon, 12 Nov 2012 09:43:46 -0800
To: Andre Oppermann <oppermann@networx.ch>
Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>,
 Adrian Chadd <adrian@freebsd.org>, Peter Wemm <peter@wemm.org>
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On Nov 12, 2012, at 1:27 AM, Andre Oppermann <oppermann@networx.ch> wrote:

> On 12.11.2012 09:52, Alfred Perlstein wrote:
>> On 11/11/12 11:28 PM, Andre Oppermann wrote:
>>> On 12.11.2012 08:10, Alfred Perlstein wrote:
>>>> I noticed that TCBHASHSIZE does not autotune.
>>>> 
>>>> What do you think of the following algorithm?
>>>> 
>>>> Basically round down to next power of two based on nmbclusters / 64.
>>> 
>>> Please wait out for a real fix of the various mbuf-whatever tuning
>>> issue I'll propose shortly.  This approach may become inapproriate.
>>> Also the mbuf limits can be changed at runtime by sysctl.
>>> 
>> What is the timeline you are asking for to wait?
> 
> http://svnweb.freebsd.org/changeset/base/242910

Very cool!

So instead of nmbclusters, will maxsockets work?  Ideas/suggestions?

-Alfred.