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NEON memory copy is slower

Question asked by Ismail Mohammed on Sep 28, 2016
Latest reply on Sep 28, 2016 by igorpadykov



As per the below article, I tried NEON memory copy with preload on IMX6 Solo and Quad modules.


For 16 MB data copy, the memory copy performance is as below:

IMXDQ Module

memcpy_libc : 435 MB/s

memcpy_neon: 343 MB/s

IMX Solo Module

memcpy_libc : 472 MB/s

memcpy_neon: 385 MB/s


Why neon memcpy performance is slower than libc memcpy?