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Re: idl to fortran [message #73462 is a reply to message #3905]

Fri, 12 November 2010 02:53

oxfordenergyservices is currently offline

oxfordenergyservices
Messages: 56
Registered: January 2009

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On Nov 12, 9:55 am, geoff <oxfordenergyservi...@googlemail.com> wrote:
> On Nov 10, 9:53 pm, Paulo Penteado <pp.pente...@gmail.com> wrote:
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>> On Nov 10, 7:51 pm, Paulo Penteado <pp.pente...@gmail.com> wrote:
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>>> On Nov 10, 6:21 pm, a <oxfordenergyservi...@googlemail.com> wrote:
>
>>>> I've been writing some code in IDL. I've pushed it as fast as it can
>>>> go but we may need it quicker. That means possibly many-cpu parallel
>>>> code. That unfortunately means fortran or C with an OpenMP parallel
>>>> compiling and running.
>
>>> It may not hurt to point out that IDL can use multiple processors
>>> automatically (the routines that use the thread pool).
>
>> Also, if you do end up rewriting things, it will probably not be
>> necessary to rewrite everything. You could do it just for the
>> bottlenecks, and leave the rest in IDL, accessing those reimplemented
>> parts through DLMs or call_external.
>
> Thanks all the above for your comments, I'll look into them. In the
> mean time, I was considering your suggestion Paulo of the
> bottlenecks. I have not a huge a amount of IDL code but the
> bottleneck is possibly 200 lines looped 5 milliontimes. It would be
> pretty easy to code this in f90. I read somewhere else I could spawn
> the fortran code which does this bottleneck but how would I
> communicate between idl and fortran? I could write the data out from
> idl, read in fortran, write back out in fortran and read back in in
> idl. The data would be in RAM I assume so wouldn't be too slow but
> the data is rather large (a few 20 by 5 million arrays). Thanks for
> your suggestions
>
> Russ

sorry Paulo, bit keen on the keyboard there! I'll look into DLMs and
call_extrenal

Russ

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[Message index]

		IDL to FORTRAN translator ? By: ebstein on Thu, 30 March 1995 00:00
		Re: idl to fortran By: oxfordenergyservices on Fri, 12 November 2010 02:53
		Re: idl to fortran By: oxfordenergyservices on Fri, 12 November 2010 01:55
		Re: idl to fortran By: penteado on Wed, 10 November 2010 13:53
		Re: idl to fortran By: penteado on Wed, 10 November 2010 13:51
		Re: idl to fortran By: Michael Galloy on Wed, 10 November 2010 13:08
		Re: idl to fortran By: natha on Wed, 10 November 2010 12:48

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