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Date:      Fri, 4 Jun 2004 21:23:17 +0100
From:      "Steven Hartland" <killing@multiplay.co.uk>
To:        "Robert Watson" <rwatson@freebsd.org>, "Ali Niknam" <ali@transip.nl>
Cc:        freebsd-hackers@freebsd.org
Subject:   Re: FreeBSD 5.2.1: Mutex/Spinlock starvation?
Message-ID:  <00fb01c44a71$c7f26d10$b3db87d4@multiplay.co.uk>
References:  <Pine.NEB.3.96L.1040604153442.34555O-100000@fledge.watson.org>

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----- Original Message ----- 
From: "Robert Watson" <rwatson@freebsd.org>

> You might want to try adding "options ADAPTIVE_MUTEXES" to your kernel
> configuration, which will cause mutexes to spin briefly on SMP systems
> before sleeping, and has been observed to improve performance quite a bit.

Thats very interesting is there a specific set off conditions
where it would pay off that you guys know of or is it more
a try it and see?

We run ~ 100 dual machines here the vast majority FreeBSD
as game servers and would consider upgrading the kernels
if you thought it would help.

    Steve



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