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    FFT Performance on DSPLIB

    FFT Performance on DSPLIB

    This question is answered
    Nios Ensa
    Posted by
    on Apr 11 2012 18:24 PM
    Prodigy190 points

    Hello,

    I want to benchmark the floating-point FFT on C6678, I executed that DSPLIB routine : _DSPF_sp_fftSPxSP ; which is that last update written in linear assembly, for N=16k (16384) I mesured a count of : 466 244 clock cycles ; all my data is in L2, L1D cache is activated in cache (32k), and the compiler optimizations are active (-o3) ..

    Is that what is expected to get ?

    Thanks

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    • Alberto Chessa
      Posted by
      on Apr 12 2012 01:31 AM
      Verified Answer
      Verified by
      Genius3740 points

      Hi,

      This is a discussion about the fft performance in: http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/t/125157.aspx

      For the 16K, my benchmarks, on DDR3 (EVM) with 512K L2 cache enable, give 530887 cycles. Your result seems resonable to me.

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