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Shouldnt there be a compile option for -march=native? #165

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x3oo opened this issue Aug 20, 2021 · 4 comments
Open

Shouldnt there be a compile option for -march=native? #165

x3oo opened this issue Aug 20, 2021 · 4 comments

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@x3oo
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x3oo commented Aug 20, 2021

i believe gfortran does support -march=native?

@ArturoMS13
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Dear x3oo,

can you provide more information about this?

Thank you

@x3oo
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x3oo commented Aug 20, 2021

I thought you could speed up sharpy by compiling it with -march=native.
gfortran supports this option too.
anyway this is unrelated to the other problem because i compiled without those options.

@x3oo
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x3oo commented Aug 20, 2021

I thought providing -march=native as compiler options would accelarate sharpy but its hard to find the option in the config files. anyway

@fonsocarre
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-march=native only works for local compilation (where the target is the same as your machine). Because of that, -march=native breaks the Docker container, as it is compiled in a different CPU (which might or might not be the same as yours). Maybe adding a note in the documentation for the performance-oriented user might make sense, but I'd rather be able to compile the Docker image with the same script as a normal user would.

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