Hyperthreading/Dual core CPU's

[Richard Miguel San Martín]

Yes, i have disabled HT on my machines too, but that is because i dont have 
any application that use this feature. I dont have Dual core processors, but 
i think acquire some machines next year. In my case, i have meteorological 
applications, this is the principal reason.

Cheers, 

R. MIguel



On Fri, 11 Nov 2005 09:55:45 -0600, Rhugga Harper wrote
> I would disable hyper-threading. We have 24k+ hosts (Mostly 2650's 
> and 2850's) and saw nothing but problems with hyperthreading on 
> nearly every distro: RH AS 2.1, 3 and SLES 9. In many cases it 
> actually inhibited performance. There is a very small niche of 
> applications that can benefit from hyperthreading. (Our hosts are 
> mostly oracle rac's, application servers, and other various middle-
> tier applications) Note that the problems with hyper-threading 
> surface under heavy enterprise loads, which of course is where you 
> would need it.
> 
> Go with AMD and their HypeTransport / dual-core. Much better performance
> accross the boards IMHO.
> 
> -rhugga
> 
> On 11/11/05, Mike Ault <mike at ault.cc> wrote:
> >
> > As long as you load the SMP version it should see them. If not there is a
> > relink option to turn on hyperthreading for the CPUs.
> >
> > Mike
> >
> > -----Original Message-----
> > From: redhat-list-bounces at redhat.com [mailto:
> > redhat-list-bounces at redhat.com]
> > On Behalf Of Robert
> > Sent: Friday, November 11, 2005 10:13 AM
> > To: redhat-list at redhat.com
> > Subject: Hyperthreading/Dual core CPU's
> >
> > Hi list,
> > We have plans to buy HP DL380's and put Redhat AS 4.0, anyone know how the
> > Hyperthreading works on Redhat, can we enable it on Redhat? does it see 2
> > CPU's if there is only one CPU board?.
> > In Windows 2003 we have enabled Hyperthreading and OS sees 4 CPU's (2 CPU
> > boards).
> > Thanks in advance
> >
> >
> >
> >
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------------------------------
Richard Miguel San Martin
Administrador de Sistemas
     CPN  - SENAMHI
Telf. 6141414 Anexo 464
Cel. 98540364
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