[Info-vax] x86-64 data aligment / faulting

Simon Clubley clubley at remove_me.eisner.decus.org-Earth.UFP
Sun Feb 27 08:08:45 EST 2022


On 2022-02-26, Arne Vajhøj <arne at vajhoej.dk> wrote:
>
> GFortran/Windows/x86-64 (100x more reps):
>
>   OFFSET  0 :   7473 ms
>   OFFSET  1 :   7285 ms
>   OFFSET  2 :   7301 ms
>   OFFSET  3 :   7301 ms
>   OFFSET  4 :   7269 ms
>   OFFSET  5 :   7208 ms
>   OFFSET  6 :   7191 ms
>   OFFSET  7 :   7192 ms
>   OFFSET  8 :   7519 ms
>   OFFSET  9 :   7285 ms
>   OFFSET 10 :   7270 ms
>   OFFSET 11 :   7285 ms
>   OFFSET 12 :   7270 ms
>   OFFSET 13 :   7207 ms
>   OFFSET 14 :   7176 ms
>   OFFSET 15 :   7176 ms
>   OFFSET 16 :   7473 ms
>

In situations like this Arne, it is _always_ a good idea to have
a look at the generated code just to make sure that the compiler
has not done anything unexpected.

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Walking destinations on a map are further away than they appear.



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