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Old 2020-03-07, 06:36   #5
VBCurtis
 
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"Curtis"
Feb 2005
Riverside, CA

24·263 Posts
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In general, LLR does not benefit from splitting an FFT into threads such that FFT size divided by threadcount is smaller than 128k.

That is, a 256k FFT size will run 2-threaded quite nicely. FFTs below 200k in size are not efficient 2-threaded. I've run a ~400k FFT 3-threaded with reasonable success.
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