Solve Poisson Problem with Finite Difference using parallelization

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Kilian Thomas
Kilian Thomas 2014-8-8
评论： Kilian Thomas 2014-8-8
Hi, I am trying to solve the poisson problem with finite difference. However, depending on the grid size, the calculation may take time. That's why I want to using parallelism. I already solved this problem using and I would like to do it on matlab. Is there any way in matlab to solve two subproblems in parallel that need to communicate with each other?
Thank you

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Edric Ellis
Edric Ellis 2014-8-8
You might consider using SPMD blocks within MATLAB - these run blocks of code in parallel, and allow communication using the labSend / labReceive family of functions.

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Ahmet Cecen
Ahmet Cecen 2014-8-8
Poisson equation boils down to a simple Ax=b problem. If you have the parallel computing toolbox, using mldivide (or the plain \ operator) will automatically exploit all available threads. Otherwise, I would look into 3rd party MP/MPI implementations for MATLAB.
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Ahmet Cecen
Ahmet Cecen 2014-8-8
Gauss Seidel is an iterative method to solve LINEAR problems of the exact form Ax=b. Your problem is very much linear. The choice of not using mldivide is I am guessing due to the fact that you are interested in a transient solution rather than steady state, which was not clear in your question.
Kilian Thomas
Kilian Thomas 2014-8-8
Yes sorry. You are totally right. I will have a look at your solution too. It could be much faster. Thank you :)

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