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

[Nomoreno <nomorenook@netscape.net>]

I tried to disable HT but something weird happens. When I went to the 
BIOS and saw "CPU Application" is Enabled, I guess it is about HT. 
However, I was not able to use the arrow key to scroll down to this this 
field. Any ideas to disable HT?

Thanks!




andrew_s@ifs.org.uk wrote:


> 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
> > > >
> > > > *
> > > > *   For searches and help try:
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> > > *
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> >
> >
> > *
> > *   For searches and help try:
> > *   http://www.stata.com/support/faqs/res/findit.html
> > *   http://www.stata.com/support/statalist/faq
> > *   http://www.ats.ucla.edu/stat/stata/
> *
> *   For searches and help try:
> *   http://www.stata.com/support/faqs/res/findit.html
> *   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.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/