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DSPLIB beanchmark

pratik jain
Intellectual 475 points
Other Parts Discussed in Thread: TMS320C6678

hi

 i am trying 256 point real FFT using DSPLib on TMS320C6678 processor. i am not gatting performance as given in DSplib doc.

256 point SpxSp FFT   1972 cycles  but according to doc  is 1470 cycle

128 point Spxsp FFT   1092 cycles   but according to doc  is 748 cycle                    

                     Can you tell me how to achieve stated performance

  • 0
    TI__Genius 12805 points

    Jian

    It is important to understand how the cycles are measured in the library.

    The assumption is that the data resides in L1 memory, and the library number is pure CPU cycles, not including other memory latencies, cache misses and so on.

    if you measure your performances from L1, get back to me.

     

    Otherwise, try to do touch before you start the performances and see what are the benchmark numbers. They should be similar

     

    Regards

     

    Ran