FBSD 5 & SMP

[Steven Hartland]

Im not sure it depends on the machine and the apps being run.
We have been running 5.0-RELEASE on all or production
machines after we did a soke test and found no issues at all
in our environment. What would be interesting to know though
is if 4.8 + Hyperthreading + SMP out performed 5.0 SMP
as it doesn't have Hyperthreading support. Any one know if
5.0 has Hyperthreading in CURRENT?

    Steve
----- Original Message ----- 
From: "Eric Anderson" <anderson at centtech.com>
To: "agent dero" <dero at bluhayz.homeunix.org>
Cc: <freebsd-performance at freebsd.org>
Sent: Wednesday, April 30, 2003 1:57 PM
Subject: Re: FBSD 5 & SMP


> agent dero wrote:
> > I was reading the FBSD 5.0 release notes, and how the new version has
> > better support for multiple processors. I haven't been able to find any a
> > 4.x-STABLE SMP support docs. Does this mean that 4.7, my current release,
> > doesn't support the multiple processors well. I am rebuilding my small
> > business' server, and trying to decide if a dual processor will be the
> > better way to go, but not sure if the advantages are going to be huge with
> > the. I read the previous message about WITH_THREADS as a ports option, but
> > the ports maximizing the dual CPUs isn't my greatest, I need the kernel
> > itself to maximize the CPUs. Is this possible under any of the stable
> > releases, before 5.0 ??
> 
> Yes, FreeBSD versions prior to 5.0 have SMP support, however 5.0's 
> support is more "finely tuned" and will give you better results. 
> However, since this sounds like a production server, you may want to 
> stick with 4.8-RELEASE, and built a new kernel with SMP support. 
> Depending on what you are using the machine for, you may or may not see 
> a performance benefit of a dual processor machine.
> 
> What's the machine's primary function?
> 
> Eric
> 
> 
> -- 
> ------------------------------------------------------------------
> Eric Anderson    Systems Administrator      Centaur Technology
> Attitudes are contagious, is yours worth catching?
> ------------------------------------------------------------------
> 
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