speed of fft using imx.6

[vividchloe]

hi,

     I have tried to make a fft calculation with opencl in imx6qp,but the speed was so slow.

     It cost 300+us to calculate a 2048 points fft of a sine signal when using GPU while almost cost 8000+us with arm. The result was right ,but I wonder if the speed is normal? Or is there any method to accelerate?  How long does it cost usually?

Thank you!

[igorpadykov]

Hi vivid

fft algorithms are specially handled by dsp processors, so seems with i.MX6

more suitable to try neon:

Android Community: Ne10 FFT feature | ARM Connected Community 

Best regards
igor
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[vividchloe]

Thank you very much! I had tried the lib NE10,but I didn't now how to add it to the tool-chain of the board,so the target showed that "error while loading shared libraries: libNE10_shared.so.10",do you have any advice?