HTT and SMP question

[Kris Kennaway]

On Tue, Apr 20, 2004 at 10:30:05AM -0700, Tom wrote:

> > My parallel package builds are slower on build machines with HTT.
> > It's not a magic bullet.

>   There are also FreeBSD factors:  FreeBSD 4 compiled with SMP, avoids a
> lot of locking code.  FreeBSD 4 with SMP has a lot of extra locking code,
> and that code has cost associated with it.  The cost of SMP locking in
> FreeBSD 4, may out way the benefit of HTT.  With FreeBSD 5, the SMP
> locking is done quite differently, and it is done all the time anyhow
> (since FreeBSD 5 is SMP by default).  So HTT on FreeBSD 5 is more likely
> to be beneficial than HTT on FreeBSD 4 (with a non SMP kernel).

I was talking about FreeBSD 5 :-)

Kris
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