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Re: IDL and Dual Processor PC's [message #15720 is a reply to message #15635]

Fri, 04 June 1999 00:00

rivers
Messages: 228
Registered: March 1991

Senior Member

In article <mgs-0306991006350001@teton.ivsoftware.com>, mgs@ivsoftware.com (Mike Schienle) writes:
> In article <7j62f0$krm$1@pale-rider.INS.CWRU.Edu>, "Tanya Lancaster"
> <lancaste@morph.ebme.cwru.edu> wrote:
>
>> We are looking into purchasing a dual processor pc. I was wondering if
>> there would be a notable increase in speed for running IDL programs.
>
> Nope. IDL is single-threaded, implying it cannot divvy it's processing up
> among multiple processors. Once you start IDL it stays on the same CPU.
> You can try some interesting things like spawning addition copies of IDL
> onto other processors. I tried that about 7 years ago on a Sun MP/670 with
> 4 processors. Not worth the effort was my conclusion.

It's not QUITE true that IDL is single-threaded. The IDLgrVolume object is
multi-threaded. Thus, volume rendering runs significantly faster on
multi-processor machines.

____________________________________________________________
Mark Rivers (773) 702-2279 (office)
Argonne National Laboratory (630) 252-0422 (office)
Building 434A (630) 252-0405 (lab)
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Argonne, IL 60439 (630) 252-0443 (FAX)

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[Message index]

		IDL and Dual Processor PC's By: Tanya Lancaster on Thu, 03 June 1999 00:00
		Re: IDL and Dual Processor PC's By: mgs on Mon, 07 June 1999 00:00
		Re: IDL and Dual Processor PC's By: woodford on Mon, 07 June 1999 00:00
		Re: IDL and Dual Processor PC's By: Laurent Chardon on Fri, 04 June 1999 00:00
		Re: IDL and Dual Processor PC's By: steinhh on Fri, 04 June 1999 00:00
		Re: IDL and Dual Processor PC's By: rivers on Fri, 04 June 1999 00:00
		Re: IDL and Dual Processor PC's By: steinhh on Fri, 04 June 1999 00:00
		Re: IDL and Dual Processor PC's By: rivers on Fri, 04 June 1999 00:00
		Re: IDL and Dual Processor PC's By: Peter Mason on Fri, 04 June 1999 00:00
		Re: IDL and Dual Processor PC's By: David Foster on Thu, 10 June 1999 00:00

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