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speed of fft using imx.6

Question asked by vivid chloe on Nov 20, 2016
Latest reply on Nov 22, 2016 by vivid chloe


     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!