Questions tagged [parallelization]
Questions on parallel computing in Mathematica.
972 questions
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How can I reduce RAM usage when using ParallelMap with large data?
I’m using ParallelMap on a very large dataset (millions of elements), but it quickly consumes all available RAM.
For example:
...
- 1,417
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Parallelization on a cluster
I have the unique chance to run several tasks on a cluster with many cores and RAM. The problem is that it seems that my Mathematica code is not using all the power of 64 cores with 1024gb RAM that I ...
- 21
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Configuring parallel kernels
I have Windows 11 and a CPU with 16 cores/32 threads. In Mathematica 14.2, I turn on "Local" and "Localhost" kernels in preferences, such that I have 32 subkernels.
Does it make ...
- 6,063
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Do functions from a .m file loaded with Get automatically become available on all parallel kernels?
For a package, we use ParallelNeeds to make its functions available on all kernels for ParallelMap. For a ...
- 1,417
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How does one parallelize WindingPolygon?
Consider this toy model: a list 100,000 simple point sets, and we Map WindingPolygon over it:
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- 2,072
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Timeout for subkernels using SLURM
I had previously been using a cluster with SLURM to run parallel computations with ParallelTable. However, it has randomly stopped working and I now receive the error:
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- 413
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Unexplained $Aborted in ParallelTable
I am trying to run the code:
ParallelTable[
FMwrapper[small[[i]]],
{i,20},
Method->"CoarsestGrained",
DistributedContexts->Full
]
...
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Modify list defined globally in module when using ParallelMap
I have the following problem:
In order to use ParallelMap to apply a certain procedure/test to a list Range[0, nval - 1], I ...
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How to release memory from parallel kernels?
I'm doing image processing in parallel kernels:
(I'm sorry, but it is impossible to construct a MWE for this, so I am including this code to indicate what I am doing)
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- 7,544
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ForeignFunctionLoad and parallel evaluation
Context and Goal: I have a program (written in Fortran, I think we can set it up to use the ForeignFunctionLoad C types) that I would like to run in parallel. The ...
- 872
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How to stop Map or ParallelMap on first error and get the input that caused it?
I want to run a function using Map or ParallelMap over a large list of inputs, but I would like the evaluation to stop as soon ...
- 1,417
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Why do plots exported from inside ParallelDo[] have red error overlay but no error?
I am processing some data and exporting the results as plots. It runs faster if I use a ParallelDo loop but then most of the plots get a red error overlay when exported. The plots do not get the ...
- 2,695
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RegionPlot, parallel evaluations, and interpolations
Consider the following serial and parallelized computation of some regions:
...
- 6,063
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Speeding up multiplication of matrix arrays by parallelization?
EDITED QUESTION:
I edit my question to be as clear as possible, as I find the problem quite confusing and severe, and the previous answers unfortunately not helpful.
I define two arrays of matrices ...
