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Matlab in AVX2 mode (for AMD CPU's)

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MD
MD 2019-12-17
回答： Andre 2023-8-17
In several questions about poor performance of AMD CPU'S, it is suggested to change Matlab to AVX2 mode. With the mostly accepted answer being: https://nl.mathworks.com/matlabcentral/answers/396296-what-if-anything-can-be-done-to-optimize-performance-for-modern-amd-cpu-s#answer_401963.
When I look at the system requirements it is recommended to use "Any Intel or AMD x86-64 processor with four logical cores and AVX2 instruction set support" ,see: https://nl.mathworks.com/support/requirements/matlab-system-requirements.html.
However this made me think: if AVX2 increases performance significantly and is suggested to be supported by the CPU, why isn't this enabled by default for AMD CPU'S.
Therefore the following questions:
  1. Does this introduce instability or unwanted behaviour
  2. Are there other performance penalties caused by AVX2 mode
  3. Are there other disadvantages when using AVX2 mode?
Thanks in advance

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Yair Altman
Yair Altman 2020-4-1
编辑：Yair Altman 2020-4-2

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Andre
Andre 2023-8-17
sry to necro this thread, but i was searching for AVX512 in this regard, but didnt find a definite answer to this. is AVX512 supported in the latest build and if so, do i have to force using it like AVX2 ?

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