claude<p>turns out that <a href="https://post.lurk.org/tags/FFTW3" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FFTW3</span></a> has <a href="https://post.lurk.org/tags/OpenMP" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OpenMP</span></a> support built right into it after all, so my code was in vain (though I learned a bit about <a href="https://post.lurk.org/tags/FFT" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FFT</span></a> <a href="https://post.lurk.org/tags/DFT" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DFT</span></a> maths)</p><p><a href="http://www.fftw.org/fftw3_doc/Usage-of-Multi_002dthreaded-FFTW.html" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">http://www.</span><span class="ellipsis">fftw.org/fftw3_doc/Usage-of-Mu</span><span class="invisible">lti_002dthreaded-FFTW.html</span></a></p><p>for some reason I thought the multithreaded stuff was only for FFTW2... will see how it goes...</p>