Re: Should one CPU(Hyper-Threading) machine install SMP kernel?
On Mon, 2005-09-26 at 10:37 +0100, michael wrote:
> On Mon, 2005-09-26 at 10:03 +0100, Dick Davies wrote:
> > On 25 Sep 2005 23:23:48 -0700, James He <icrazy@gmail.com> wrote:
> >
> > > Should one CPU(Hyper-Threading) machine use SMP kernel, or stick to a
> > > regular kernel?
> >
> > Yup, use SMP. I get 2 cpus in cpuinfo that way (although top doesn't
> > see them for
> > some reason).
>
> Whereas, if it does support HT, I'd say it depends on what you're using
> the machine for, which kernel you've got...
>
> eg disable HT if it's a 2.4 kernel and you want to run MPI since the
> scheduler doesn't seem up to the job (and it'll go slower on 2 processes
> with HT on than on one with HT off)
let me clarify that: with 2 processors I've found the above effect for
HT on/off and I extended it to 1 processor but I have not tested this
myself
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