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From: Michael Powell <nightrecon@hotmail.com>
Subject: Re: FreeBSD, Centos and ZFS - SOLVED
Date: Wed, 23 Oct 2013 02:17:41 -0400
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aurfalien wrote:

> On Oct 22, 2013, at 7:55 PM, Adrian Chadd wrote:
> 
>> Well, the 30% diff in performance due to those two intel CPU options
>> means that somehow the scheduler and power management stuff in FreeBSD
>> isn't playing with turbo boost / speedstep.
>> 
>> So yeah, figuring out why would be nice.
> 
> Ditto.
> 
> I never enabled powerd in FreeBSD9 or 10.  Unsure what the default
> position is.
> 
> In CentOS, I usually just set a diff BIOS feature as disabled or
> performance depending on what the options are.
> 
> On this server, it had acoustic/performance/balance as well as well as
> that CPU option which threw me off.
> 
> - aurf
> 
> 

You might find this interesting:

http://www.ateamsystems.com/blog/Increase-FreeBSD-Performance-With-powerd


-Mike