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Poor performance by ARM/DSP communication on OMAP3530

Hallo,

I have an audio datastream and want to process this on the dsp. I tried to use dsplink with RingIO to get the data from the arm to the dsp-core but the performance is very poor. Then I tried the readwrite example with proc_write and there is also such a poor performance.

Actually it's faster to process the datastream on the arm-core but there are many operations which should calculate faster on the dsp.

time for the same datastream (i think it was a 3MB datastream):

arm: 70µs

dsp with ringio: 271µs

 

Is there any way to get faster communication bitween arm and dsp?

 

Michael