Intel® Integrated Performance Primitives
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Memory layout for large FFTs

wickwack
Beginner
116 Views
In the case of large FFTs, size 512K+ it appears that the processing become memory bus limited. Apart from using ippsMalloc for memory allocation, is there anything else that should be done to improve performance? At these sizes the processor cache can't be very helpful?

Dave
0 Kudos
1 Reply
Vladimir_Dudnik
Employee
116 Views

Hi Dave,

here is our expert comment

ippsFFT performs internal blocking for such big vectors nothing else may be done.

Regards,
Vladimir

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