Timothee Mathieu <timothee.math...@inria.fr> writes: >>> So could you clarify on the point you made earlier? You've ran guix pack >>> on Arch, sent it to Ubuntu, unpacked, ran, and the result you got was >>> the same as on Arch? Or was the result the same as earlier on Ubuntu? > > The result was the same as earlier on Ubuntu, the pack results are the same > as the guix shell results, I don't get reproducibility across the two > computers. > >>> What if you make the pack on Ubuntu, unpack and run it there, and on >>> Arch as well? > > Nothing changes, still Ubuntu laptop and Arch laptop give different results, > even though the pack are the same.
Okay, good, that is more what I would expect then. I will give it more thought and get back to you, I currently don't really have a specific thing in mind that would cause this. However, it would help if you shared more details on the language and libraries involved, how you set the random seed and where do random values come in the process (the best would be to see the code that actually uses the random) And as an initial test you could try generating a few random numbers manually to see if they are the same on Arch and Ubuntu. But maybe this whole thing is actually something else than randomness. What about stuff like the pwd or files under pwd, are they the same in the container? As an absurd example, the program could be checking if file `hello_world` exists and based on that change the results... of course in reality it's going to be something more subtle. Regards Rutherther
