Groups > comp.soft-sys.math.mathematica > #1463

ProgressIndicator and ParallelTable problem :(

From	psycho_dad <s.nesseris@gmail.com>
Newsgroups	comp.soft-sys.math.mathematica
Subject	ProgressIndicator and ParallelTable problem :(
Date	2011-04-04 10:32 +0000
Organization	Steven M. Christensen and Associates, Inc and MathTensor, Inc.
Message-ID	<inc6no$11g$1@smc.vnet.net> (permalink)

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Hi all,
I am trying to use the ProgressIndicator with a parallel evaluation.
If I just do the calculation inside a normal Table then the following
piece of code works OK, ie the ProgressIndicator actually progresses.

In[1]:= ProgressIndicator[Dynamic[x],{1,8}]

In[2]:= Table[Pause[0.05];f[x],{x,1,8}]//AbsoluteTiming
Out[2]= {0.4000228,{f[1],f[2],f[3],f[4],f[5],f[6],f[7],f[8]}}

However, if I use the ParallelTable instead, then the calculation is
done much faster as expected but the ProgressIndicator does not work.

In[3]:= ParallelTable[Pause[0.05];f[x],{x,1,8}]//AbsoluteTiming
Out[3]= {0.0650038,{f[1],f[2],f[3],f[4],f[5],f[6],f[7],f[8]}}

Any ideas why this happens?

To make my question more clear, what I would like to be able to do is
to have the ProgressIndicator update every time one of the parallel
Kernels finishes its calculation, with 100% achieved when all
calculations are done. Is there any way this can be achieved?

Thanks for any hints/ideas/help!

Cheers

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ProgressIndicator and ParallelTable problem :( psycho_dad <s.nesseris@gmail.com> - 2011-04-04 10:32 +0000
  Re: ProgressIndicator and ParallelTable problem :( Albert Retey <awnl@gmx-topmail.de> - 2011-04-05 10:41 +0000

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