Re: st: 50% CPU Performance, Stata or Computer?

[Andrew Shephard <andrew_s@ifs.org.uk>]

You only experience performance increases from HT if the applications 
which you are using support them. Therefore, if Stata does not support 
HT (which I do not believe it does), then it does not matter if you have 
HT enabled or not.

Also note that for applications that do support HT, performance increase 
will usually be quite modest (an increase of 25% at most I think).


Nomoreno wrote:


> I guess you are right because the task manager shows two CPU 
> performance windows.
>
> Quick question: Why do you say that if I disable it in the BIOS, the 
> actual performance will be the same? I would think the simulations 
> will run twice as much faster as before if I disable it. Am I missing 
> anything here?
>
> Thanks!
>
>
> andrew_s@ifs.org.uk wrote:
>
>
> > I suspect it might be because you have a CPU which supports 
> > HyperThreading (HT). If this is the case then there is nothing to 
> > worry about. My understanding (correct me if I am wrong), is that HT 
> > essentially makes you computer think there are two CPUs (look in your 
> > System properties). If you are just seeing 50% usage then it just 
> > means that Stata does not support HT and so does not have any 
> > performance boost as a result of this.
> >
> > If you disable HT (which you can typically do in the BIOS) then I 
> > would expect that CPU usage would shoot up to 100%. However, the 
> > actual performance which you get will be the same.
> >
> > Nomoreno wrote:
> >
> >
> > > Hello all,
> > >
> > > I was puzzled by one annoying thing of my computer and I don't know 
> > > whether I should fault Stata or my computer.
> > >
> > > Basically, I am running computational intensive Monte Carlo 
> > > simulations on Stata under Windows XP on a brand new Dell 
> > > Inspiration laptop. Somehow my Task Manager shows that the computer 
> > > is using 50% of its CPU usage on this computer. It is weird because 
> > > the same program always use 100% of the CPU on my old machine.
> > >
> > > I suspect it is the problem of my computer rather than my Stata, 
> > > though I am not 100% sure. Anyone has any ideas to release the 
> > > remaining 50% CPU power of my computer? I really appreciate your help!
> > >
> > >
> > > Best,
> > > Simon
> > >
> > > *
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> > *
> > *   For searches and help try:
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>
> *
> *   For searches and help try:
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> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
*
*   For searches and help try:
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*   http://www.ats.ucla.edu/stat/stata/