OpenMP incompatible with LAPACK & BLAS routines
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I've written a few c mex files and have called dsyev to find eigenvalues etc. I want to call this routine in parallel in a threaded loop. Everything compiles OK without warnings (using MS Visual Studio Prof. Edition 2005).
However, when I call it from Matlab it just crashes, without any error messages...
Anyone have any ideas?!?
Thanks in advance
Adam
5 个评论
James Tursa
2011-2-26
Well, I think your title already says it. The LAPACK and BLAS libraries that ship with MATLAB are probably not thread-safe. However, many of the routines in these libraries are already multi-threaded, so I don't know how much speed up you would get even if they were thread-safe.
Adam connolly
2011-2-26
James Tursa
2011-3-5
I should have asked this before, but are you sure your C code for calling dsyev is correct (argument type, etc)? Can you run it in a single thread to verify that it is coded correctly?
zhuanyi
2024-3-31
Hi Adam, do you have any update? I am facing the same problem.
James Tursa
2024-4-2
编辑：James Tursa
2024-4-2
@zhuanyi Can you open a new Question, and maybe include a minimal complete example that reproduces the problem?
回答（1 个）
Jill Reese
2011-3-4
0 个投票
Running your original mex function within a MATLAB Parallel Computing Toolbox parfor loop might give you the parallelism you want.
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