MATLAB: How to execute parallel computing in Matlab without altering the script

parallel computingParallel Computing Toolboxparpool

I have tried entering "parpool" in the command line before running the script but it is still running on only one CPU. The pool becomes active with my 12 processors running however it seems like my code cannot access the pool. It prompts me that the paralle pool is idle and will shut down soon.

I think the problem is in the execution of parpool. Any help will be appreciated. Thanks.

Best Answer

It's not quite clear what you're trying to achieve here. You should launch parpool only if your script uses parallel language features like parfor, parfeval, or spmd. If you simply want to run your script in the background, you can use batch.

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MATLAB: Running distributed jobs

You need to give the name of the script to the createTask function, like so:

    sched = findResource(...);
    job = createJob(sched); 
    task = createTask(job, 'scriptFileName');
    submit(job);

This is basically equivalent to running

    job = batch('scriptFileName', sched);

A single isolated task might run more slowly on a cluster because MATLAB workers run in "single computational thread" mode. You might be better trying to run lots of scripts simultaneously.

MATLAB: Altering matrices

convn(A,B,'same')

where A is your matrix, and B is a mask that determines the weightings of points for averaging.

doc convn

for more details

Best Answer

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MATLAB: Running distributed jobs

MATLAB: Altering matrices

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