Mex files and parallel processing
24 views (last 30 days)
Show older comments
I have a function that uses parfor and I could successfully run it on my local cluster. When running, I could see that the local cluster was starting and was active.
From this file, I created a mex file. The mex file is created on my local machine (Win) and then I run it by using the local cluster (so, always Win). However, when the mex is running, the local cluster does not start. When I first start it, it goes in idle mode while the mex is running. So I assume that the mex file does not run in parallel.
The mex file is compiled for C language, and the default compiler is MinGW64. Shouldn't this be fine for parallel computation of mex files?
>> mex -setup
MEX configured to use 'MinGW64 Compiler (C)' for C language compilation.
Historically, MINGW did not support OpenMP, which is what parfor compiles into if you ask to generate code for parfor.
If I recall correctly, you need one of the Microsoft compilers -- but if I recall correctly, any of the Community or Express editions since 2011 should work (but not SDK 7.1), provided that the edition is supported by your MATLAB release.
... which shows about installing OpenMP with MinGW.
However, it does not deal with the incompatibilities issues you rightly pointed to.
Find more on MATLAB Support for MinGW-w64 C/C++ Compiler in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!Start Hunting!