• Reproducibility across different hardware

    From Simon Richter@21:1/5 to Guillem Jover on Wed Sep 25 04:30:02 2024
    Hi,

    On 9/25/24 08:55, Guillem Jover wrote:

    So if there was a switch, those would end up
    being recorded as well, and used when reproducing the outputs. And this
    could also happen with a newer version of zlib itself.

    I have a POWER9 box, which includes a NX-GZIP coprocessor, which is
    currently not used for anything, but it makes even -9 compression very
    cheap (9 GB/s). If I were to use it (probably through the kernel
    subsystem), I should probably record it somewhere.

    Thinking about it, I'd expect POWER to generate different output than
    x86 when building an arch:all package with the result of some floating
    point computation, at least when -ffast-math is active (x86 being wrong).

    Simon

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