Date: Fri, 4 Jun 2004 21:50:05 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Robert Watson" <rwatson@freebsd.org> Cc: Ali Niknam <ali@transip.nl> Subject: Re: FreeBSD 5.2.1: Mutex/Spinlock starvation? Message-ID: <011301c44a75$8d7ee830$b3db87d4@multiplay.co.uk> References: <Pine.NEB.3.96L.1040604162906.34555P-100000@fledge.watson.org>
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----- Original Message -----
From: "Robert Watson" <rwatson@freebsd.org>
> Well, I know a bit about the general conditions -- situations where
> mutexes are held for short periods of time, rather than over long
> transactions. I know from experience that adaptive mutexes can make an
> observable difference for system builds and IPC activities.
>
> To what extent do you have systems where you can reproduce your production
> load without impacting production quality? I may have some interesting
> patches for you to try running with, if so :-).
Got two online Dev boxes I can play with, remote console backup
etc so would defo be willing to give them a shot and we run full
performance stats on all the machines so that would help determine
any gain. As you would expect a game server is constantly doing
net IO small amounts of disk IO and quite a chunk of logic
processing. The other thing of note is virtually all gameservers
run via the linux BC layer as game dev's dont generally have
a native port for FreeBSD.
I'm also currently benchmarking a dual opteron across a number
of OS's any changes you have could also be tested on that bed
vs 5.2.1-RELEASE along with the rest.
Steve
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