是否有一种将在CUDA内核中运行的FFT方法？ [英] Is there a method of FFT that will run inside CUDA Kernel?

问题描述

我目前正在将一个C ++程序转换为CUDA代码，我的程序的一部分运行快速傅立叶变换。最初我跑了FFTW，但我看到我不能在内核中调用它，所以我用cufft重写了这一部分，但它告诉我一样的东西！

Are有没有任何FFT将运行在CUDA内核？

我可以添加 __ device __ 到fftw库？ / p>

我想避免在主机中初始化或调用FFT。我想要一个完整的gpu类型函数，如果存在。

解决方案

你确定你需要避免从主办？ Nvidia的 cufft图书馆现在相当不错。移植FFTW似乎是一个相当困难的任务。您可能更容易移植 kissfft ，但仍然不容易。

I am currently converting a C++ program into CUDA code, and part of my program runs a fast Fourier transform. Originally I ran FFTW, but I saw that I couldn't call it in kernel, so I then rewrote that part using cufft but it tells me the same thing!

Are there any FFT that will run inside a CUDA kernel?

Can I just add __device__ to the fftw library?

I would like to avoid having to initialize or call the FFT in host. I want a completely on the gpu type function, if one exists.

解决方案

Are you sure you need to avoid a launch from the host? Nvidia's cufft library is pretty good these days. Porting FFTW seems like a pretty hard task. You might have an easier time porting kissfft but it is still not going to be easy.

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