[ale] Hyperthreading

[James Sumners]

That is very odd. I have a box with dual 2.0Ghz HT processors and it can compile
MySQL in four minutes and some change.

On 15 Aug 2004 10:10:29 -0400
"James P. Kinney III" <jkinney at localnetsolutions.com> wrote:

> On Sat, 2004-08-14 at 23:01, Christopher Fowler wrote:
> > On the new machine I'm installing FC2 on it is a Intel PIV 3.0Ghz.  It
> > supports Hyperthreading.  Should I disable it?  How do I use it?
> 
> A performance note: I have one P4 w/hyperthreading. There are so many
> things it does slower with HT on than off that I finally turned it off.
> 
> The biggest slow-up was calculating the my digital signature on my
> email. I would have to dig out the specs on my cpu  (it's an earlier
> version) and do some hard timing tests, but a digital signature on a
> short email would take 2-3 seconds with HT on and under 1 second with it
> off. It may be a cache size issue that is causing the processor to
> thrash.


-- 
James Sumners
http://ug.dyndns.org/~jsumners/

"All governments suffer a recurring problem: Power attracts pathological
personalities. It is not that power corrupts but that it is magnetic to the
corruptible. Such people have a tendency to become drunk on violence, a
condition to which they are quickly addicted."

Missionaria Protectiva, Text QIV (decto)
CH:D 59