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Re: [Question #692681]: result indeterminism and MPI=OFF

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Jan Stránský <question692681@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 31 Aug 2020 13:41:09 -0000
Reply-to: question692681@xxxxxxxxxxxxxxxxxxxxx
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Question #692681 on Yade changed:
https://answers.launchpad.net/yade/+question/692681

    Status: Open => Answered

Jan Stránský proposed the following answer:
>  PyRunner(command='checkUnbalanced()',realPeriod=2,label='checker'),

as already discusses in #1. You have the same code, but because of realPeriod=2, it is very likely that two runs produces different results.
realPeriod=2 means running the code every two real seconds, which (depending on random circumstances like running other processes on the computer and slowing Yade) may be at different simulation times.

Use iterPeriod or virtPeriod and you should get same results

cheers
Jan

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