The Same Matlab code runs slow on AMD 2990WX-based PC and runs fast (4x times faster) on 8700k-based PC

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Johnny Sun
Johnny Sun 2018-11-19
回答： Ned Flanders 2019-11-15
My Matlab code (2018a & 2017a) runs very slow (2200 seconds) on AMD 2990WX-based PC (32cores 64threads all cores runs at 3.5GHZ, 64G RAM) and runs fast (600seconds, 3.5x times faster) on Intel 8700k (6cores 12threads at 4.0GHZ, 32GRAM). Please advise on how I can fix it ?

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Ned Flanders
Ned Flanders 2019-11-15
This is because the numeric library matlab uses is the Intel MKL Library which, when run on AMD uses SSE instead of AVX2 (although your Threadripper can run AVX2 code).
Its Intels method to keep up the marketshare.
Join the discussion here and vote it up.
https://de.mathworks.com/matlabcentral/answers/396296-what-if-anything-can-be-done-to-optimize-performance-for-modern-amd-cpu-s?s_tid=ab_old_mlc_ans_email_view
There is, possibly, a solution

更多回答（1 个）

Viacheslav Klimentyev
1. What is about
bench
results?
2. Disable 26 cores on AMD CPU and compare results with Intel at the same number of working cores for bench and your code.

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