Re: st: Stata and CPu usage

[Nick Cox <njcoxstata@gmail.com>]

no work-arounds, no ways of forcing SE to behave like MP.

Given that, the answer to 2 is just a matter of curiosity, but
http://www.stata.com/statamp/ includes a link to a white paper which
may give detals on -lpoly-.

-lpoly- is by its nature going to be much slower than alternatives
based on fractional polynomials or cubic splines, which in my
experience usually work better anyway.

Nick [a different one]

On Tue, May 29, 2012 at 10:36 AM, Tunga Kantarcı
<tungakantarci@gmail.com> wrote:
> Hello Nick and Mukund,
>
> I also believe that my Stata/SE is using one of the two processors. So
> the questions are
>
> 1. How do I make Stata/SE use both of the two processors?
> 2. How can I check that lpoly is parallelizable?
>
> Tunga
>
>> -----Original Message-----
>> From    Mukund Chari <mukundc@uw.edu>
>> To      "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
>> Subject         RE: st: Stata and CPu usage
>> Date    Mon, 28 May 2012 23:05:19 +0000
>> Hello Tunga,
>>
>> Nick is probably right.
>>
>> You might also want to consider whether the routine you are executing (lpoly in your case) is:
>>
>> a) Parallelizable: certain algorithms need to run serially, and cannot be parallelized. You might want to check if this is true in the case of lpoly.
>> b) If this routine is parallelizable, whether Stata implements a parallelized version of the routine in the Multi-Processor version. If not, getting this to run on a MP version might not help.
>>
>> Best,
>> Mukund.
>>
>>
>>
>> -----Original Message-----
>> From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Sanders
>> Sent: Monday, May 28, 2012 1:45 PM
>> To: statalist@hsphsun2.harvard.edu
>> Subject: Re: st: Stata and CPu usage
>>
>> Hello Tunga,
>>
>> I'm not a Windows user myself (so I can't verify this is how Windows Task Manager expresses CPU usage), but this is my guess:
>>
>> 1) The total processor power available to you, given a Core 2 Duo, is X
>> 2) The power of one of those two processors is then X/2
>> 3) Stata/SE can only use one processor at a time (given it isn't Stata/MP)
>> 4) 50% is actually Stata/SE using the full power of one of your two processors
>>
>> Might that be the case?
>>
>> -Nick
>>
>> On May 28, 2012, at 11:35 AM, Tunga Kantarci wrote:
>>
>>> Hello,
>>>
>>> I have an Intel Core 2 Duo CPU T7700 2.4 Ghz system with 32 gm ram and
>>> 32 bit operating system. I use Windows 7. I use Stata/SE.
>>>
>>> I am using the lpoly command and the calculations take too long. I
>>> happened to look at the CPU usage at Windows task manager and realized
>>> that the CPU usage of Stata/SE does not exceed 50%.
>>>
>>> I wonder why this is the case and if there is a way to increase the CPU usage?

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