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How to use both cpu's?

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Message 1 of 13
titoqan
324 Views, 12 Replies

How to use both cpu's?

I am running LDD 2i and am wondering why my new dual system is only using one cpu when crunching numbers in LDD. Is there a toggle somewhere that I am missing?

By the way I am running win2k pro. with 2 gigs of ram.

any pointers would be great.

Thanks,
Titoqan
12 REPLIES 12
Message 2 of 13
Anonymous
in reply to: titoqan

Out of curiosity, how do you know that only one CPU
is being utilized?


style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
I
am running LDD 2i and am wondering why my new dual system is only using one
cpu when crunching numbers in LDD. Is there a toggle somewhere that I am
missing?

By the way I am running win2k pro. with 2 gigs of ram.

any pointers would be great.

Thanks,
Titoqan

Message 3 of 13
Anonymous
in reply to: titoqan

That's because LDD was not written to take advantage of the second
processor. Applications need to be specifically designed to take advantage
of multiple processors or they will use only one.


Jon


"titoqan" wrote in message
news:f195f6a.-1@WebX.maYIadrTaRb...
I am running LDD 2i and am wondering why my new dual system is only using
one cpu when crunching numbers in LDD. Is there a toggle somewhere that I am
missing?
By the way I am running win2k pro. with 2 gigs of ram.
any pointers would be great.
Thanks,
Titoqan
Message 4 of 13
titoqan
in reply to: titoqan

I thought that acad could take adavantage of the second cpu. Is that it, Acad can and LDD cannot.

Neil... When you look at the task manager box it will show the percentage of cpu usage, and when you have two cpu's it will give you two windows one for each so that you can see that only one cpu is thinking.

I guess I was wrong. 😞

Thanks,
Titoqan
Message 5 of 13
Anonymous
in reply to: titoqan

Mine hits both CPUs. It would depend on what your
are doing. Most of the basic Autocad code has not been rewritten to take
advantage of dual CPUs. Only some of the newer code written over the past couple
of years can use both.

 

Allen


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I
thought that acad could take adavantage of the second cpu. Is that it, Acad
can and LDD cannot.

Neil... When you look at the task manager box it will show the percentage
of cpu usage, and when you have two cpu's it will give you two windows one for
each so that you can see that only one cpu is thinking.

I guess I was wrong. 😞

Thanks,
Titoqan

Message 6 of 13
Anonymous
in reply to: titoqan

A very small number of operations in AutoCAD are multithreaded (I'm pretty
sure that regeneration is like this). Overall, a second processor provides
only a very small performance improvement in AutoCAD. So, the AutoCAD
components of LDD will take advantage of a second processor to a very
limited extent, but none of the LDD specific operations (like TIN
triangulation) will.

Jon



"titoqan" wrote in message
news:f195f6a.2@WebX.maYIadrTaRb...
I thought that acad could take adavantage of the second cpu. Is that it,
Acad can and LDD cannot.
Neil... When you look at the task manager box it will show the percentage of
cpu usage, and when you have two cpu's it will give you two windows one for
each so that you can see that only one cpu is thinking.
I guess I was wrong. 😞
Thanks,
Titoqan
Message 7 of 13
Anonymous
in reply to: titoqan

Acad is MultiThread for Regeneration and routine running. It will not use
both for normal use, ex. Opening a file, saving, etc.. There is a setvar
you need to set to take advantage of this but not remeber the name. You can
go to autodesk and search for MultiThread and you will find a paper listing
the settings.




"Jon Rizzo" wrote in message
news:AAC36769F3ABD853FB79135D147C3E27@in.WebX.maYIadrTaRb...
> A very small number of operations in AutoCAD are multithreaded (I'm pretty
> sure that regeneration is like this). Overall, a second processor
provides
> only a very small performance improvement in AutoCAD. So, the AutoCAD
> components of LDD will take advantage of a second processor to a very
> limited extent, but none of the LDD specific operations (like TIN
> triangulation) will.
>
> Jon
>
>
>
> "titoqan" wrote in message
> news:f195f6a.2@WebX.maYIadrTaRb...
> I thought that acad could take adavantage of the second cpu. Is that it,
> Acad can and LDD cannot.
> Neil... When you look at the task manager box it will show the percentage
of
> cpu usage, and when you have two cpu's it will give you two windows one
for
> each so that you can see that only one cpu is thinking.
> I guess I was wrong. 😞
> Thanks,
> Titoqan
>
>
Message 8 of 13
Anonymous
in reply to: titoqan

Yes, look at the WHIPTHREAD system variable in Help.

Definitely for Zooming and Panning, but I thought I read somewhere that some
aspects of MTEXT were multi-threaded also?

Fred
Message 9 of 13
titoqan
in reply to: titoqan

I have done a search on autodesk's website in the knowledge base section using "MultiThread", "WHIPTHREAD system variable" and "2 cpus" and found nothing will keep trying thanks for the information.

Titoqan
Message 10 of 13
Anonymous
in reply to: titoqan


 

 

 


style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
I
have done a search on autodesk's website in the knowledge base section using
"MultiThread", "WHIPTHREAD system variable" and "2 cpus" and found nothing
will keep trying thanks for the information.

Titoqan

Message 11 of 13
Anonymous
in reply to: titoqan

Just look in Help.

 

Fred


style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
I
have done a search on autodesk's website in the knowledge base section using
"MultiThread", "WHIPTHREAD system variable" and "2 cpus" and found nothing
will keep trying thanks for the information.

Titoqan

Message 12 of 13
Anonymous
in reply to: titoqan

AutoCAD 2000 and later do have some support for dual processors or
hyperthreading. If you have a multiprocessor computer, you will see significant
increases in application performance, especially for graphics and file I/O
operations. (See WHIPTHREAD in the AutoCAD Help.)

 


 

Allen


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Message 13 of 13
Anonymous
in reply to: titoqan

Errrr, umm.... File I/O operations can not be multithreaded. This is not
because of AutoCAD, but rather because of the way hard drives are designed.



"Allen S. Jessup" wrote in message
news:6030CEF0F032A4B1B99D0A6879EE611D@in.WebX.maYIadrTaRb...
AutoCAD 2000 and later do have some support for dual processors or
hyperthreading. If you have a multiprocessor computer, you will see
significant increases in application performance, especially for graphics
and file I/O operations. (See WHIPTHREAD in the AutoCAD Help.)

from TS2030 http://tinyurl.com/s8l2

Allen
"Wsalling" wrote in message
news:EF8626847BD02FEF924269FE3848BEAF@in.WebX.maYIadrTaRb...
http://usa.autodesk.com/adsk/servlet/ps/item?siteID=123112&id=2962159&linkID=2475323

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