• State Not Answered
  • Locked Locked
  • Replies 5 replies
  • Subscribers 13 subscribers
  • Views 3023 views
  • Users 0 members are here
Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

CMSIS DSP RFFT - too much cycles

Knut H
Offline

Hi,

I use the CMSIS DSP library to calculate a f32 RFFT with a block size of 1024. For this it takes 262823 cycles. I read in the white-paper that it should take 55538 cycles. Because of the measurement is too slow, i have to speed it up. What could be the reason of the too much cycles?

Thanks

My setup:
Cortex-M4 on a TI-MSP432
TI-Code Composer Studio
wait states = 0
function: arm_rfft_fast_f32()

white-paper: community.arm.com/.../7563.ARM-white-paper-_2D00_-DSP-capabilities-of-Cortex_2D00_M4-and-Cortex_2D00_M7.pdf

Parents
  • 0 Offline

    What white paper?

    Have you carefully compared all your options and settings to those used in that "white paper"?

    Are you sure that your use case is comparable - ie, are you comparing like with like?

Reply
  • 0 Offline

    What white paper?

    Have you carefully compared all your options and settings to those used in that "white paper"?

    Are you sure that your use case is comparable - ie, are you comparing like with like?

Children