barney_cordoba at yahoo.com
Fri May 8 12:22:20 UTC 2009
--- On Fri, 5/8/09, pluknet <pluknet at gmail.com> wrote:
> From: pluknet <pluknet at gmail.com>
> Subject: Re: Hypertherading
> To: "Scott Long" <scottl at samsco.org>
> Cc: "Ollivier Robert" <roberto at keltia.freenix.fr>, freebsd-current at freebsd.org
> Date: Friday, May 8, 2009, 7:13 AM
> 2009/5/7 Scott Long <scottl at samsco.org>:
> > Ollivier Robert wrote:
> >> On 7/05/2009 10:17, Bob Bishop wrote:
> >>> AFAICS the reference doesn't support that
> conclusion at all.
> >> Nehalem CPUs'HT feature is significantly
> different from the one present in
> >> previous P4 CPUs. Apparently, Nehalem's HT
> works. Memory bandwidth being
> >> much higher helps too.
> > I keep here the anecdote that "it's
> better". Is there a good reference
> > somewhere that describes exactly how it works?
> > Scott
> There is a number of synthetic, low-level, and h/level
> nehalem tests flowing around in Russian.
> Also, not far ago (31.12.2008 18:09) Intel has published
> the Intel
> Optimization Reference Manual for x32/64.
> (see ch. 8). It might be useful.
Ah, Intel says that its higher priced processors are better than
their lower priced processors. There's evidence you can take to the
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