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Re: Parallel Processing in IDL [message #72822 is a reply to message #72820]

Mon, 11 October 2010 09:41

Matt[2]
Messages: 69
Registered: March 2007

Member

On Oct 11, 10:35 am, Ammar Yusuf <amyus...@gmail.com> wrote:
> What's an easy way to use multiple processors in IDL? I have a large
> program but I want to start with a simple program first. Let's say I
> have an array of a million integers and I have four processors. I want
> to add all the elements in this array and output it. I could split the
> array into four parts and give it to each processor right? Is this
> possible? How would I do this? Thanks!

I would look at the documentation about thread pool.

In your case
y = total(array)
will take care of what you want to do assuming your thread pool is set
up properly.

from the total documentation:
"This routine is written to make use of IDL's thread pool, which can
increase execution speed on systems with multiple CPUs. The values
stored in the !CPU system variable control whether IDL uses the thread
pool for a given computation. In addition, you can use the thread pool
keywords TPOOL_MAX_ELTS, TPOOL_MIN_ELTS, and TPOOL_NOTHREAD to
override the defaults established by !CPU for a single invocation of
this routine. See Thread Pool Keywords for details. "

Cheers,
Matt

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[Message index]

		Re: Parallel Processing in IDL By: natha on Mon, 11 October 2010 15:13
		Re: Parallel Processing in IDL By: Michael Galloy on Mon, 11 October 2010 13:01
		Re: Parallel Processing in IDL By: Ammar Yusuf on Mon, 11 October 2010 11:06
		Re: Parallel Processing in IDL By: Haje Korth on Mon, 11 October 2010 10:51
		Re: Parallel Processing in IDL By: Matt[2] on Mon, 11 October 2010 09:41
		Re: Parallel Processing in IDL By: Michael Galloy on Mon, 11 October 2010 09:41
		Re: Parallel Processing in IDL By: Ammar Yusuf on Wed, 13 October 2010 12:38
		Re: Parallel Processing in IDL By: rogass on Tue, 12 October 2010 05:34
		Re: Parallel Processing in IDL By: desilvestri.manuela on Tue, 03 May 2016 07:18
		Re: Parallel Processing in IDL By: charan.harish on Sat, 22 July 2017 14:25
		Re: Parallel Processing in IDL By: natha on Mon, 24 July 2017 05:56

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