Hello,
Some news:
I've compiled the CMSIS library for my target.
I've evaluated the performance of "sinf", "cosf" functions and their
equivalent "arm_cos_f32" and "arm_sin_f32":
CMSIS functions are 15% more faster than the classic one.
I've replaced all call to "sinf" and "cosf" by "arm_cos_f32" and
"arm_sin_f32" in codec2.
No remarkable difference, it's due to the fact that it seem kissFFT
precalculate table for cosinus and sinus function at creation or codec.
I've found the test you did with CMSIS for FFT in STM32 directory
"fft_test.c".
I'll try to get it working for my target and return back my profile result.
Regards
2016-06-17 10:04 GMT+02:00 Maxime Guyon <[email protected]>:
> Hello,
>
> @Steve: Thank you for the hint to define NDEBUG, I tested it but timing
> remain approximately the same.
>
> @glen english: Thank you for your hint about CMSIS, I will try to compile
> CMSIS for my platform but seem to be not straightforward since I've never
> used it before.
>
> @David Rowe: I saw some other post where you effectively say that you have
> already tested CMSIS FFT without speed improving...
> -Do you already have the piece of code for replace kissfft with CMSIS
> function?
> -Can you provide some clue to test it and some step to replace kissfft?
> -I saw a post but cannot find it now where you say that there is a file
> for test FFT, maybe it's the good starting point for test CMSIS speed
> improvement.
>
> Regards,
>
> Max
>
> 2016-06-17 2:34 GMT+02:00 Steve <[email protected]>:
>
>> Just a wild guess, but maybe define NDEBUG (-DNDEBUG) in the make call
>> which will get rid of all the assert() check macro's. Making it a release
>> rather than a debug version.
>>
>> Maybe save a few ms. I think the FFT is the real cruncher though.
>>
>>
>>
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patterns at an interface-level. Reveals which users, apps, and protocols are
consuming the most bandwidth. Provides multi-vendor support for NetFlow,
J-Flow, sFlow and other flows. Make informed decisions using capacity planning
reports. http://sdm.link/zohomanageengine
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