Question #690815 on Yade changed:
https://answers.launchpad.net/yade/+question/690815
whr posted a new comment:
Just add a comment on the bug Janek mentioned.
I tested it and yade-2020.01a indeed has this bug. makeCloud generate
different set of particle with same seed. The source code is the
Question #690815 on Yade changed:
https://answers.launchpad.net/yade/+question/690815
Robert Caulk posted a new comment:
This one of the reasons I am always hesitant to put AMD Ryzen chips into
a workstation despite their apparent cost savings.
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Question #690815 on Yade changed:
https://answers.launchpad.net/yade/+question/690815
Bruno Chareyre posted a new comment:
> if it's ignored makeCloud should generate different set of particles
with same seed?
Yes but no. :)
If you check line 52 [1] you'll see that seed was not fully ignored, it
Question #690815 on Yade changed:
https://answers.launchpad.net/yade/+question/690815
Status: Answered => Solved
whr confirmed that the question is solved:
Thank you, Robert and Janek.
>Robert,
I tested Python, it's able to generate different random number with your
suggested code.
I
Question #690815 on Yade changed:
https://answers.launchpad.net/yade/+question/690815
Janek Kozicki proposed the following answer:
Uhh. We had a bug in makeCloud in which the seed was ignored. Before you
get around to replacing your CPU , better to make sure that your version
of yade had this bug
Question #690815 on Yade changed:
https://answers.launchpad.net/yade/+question/690815
Status: Open => Answered
Robert Caulk proposed the following answer:
Yes, sadly this problem seems very far removed from Yade. I guess the
problem would even occur without yade, so just start Python and
Question #690815 on Yade changed:
https://answers.launchpad.net/yade/+question/690815
whr gave more information on the question:
I did more tests. I change seed in makeCloud and found out different
seed produce the same set of particles.
Sad news. Seems I need to find a solution to this problem.
New question #690815 on Yade:
https://answers.launchpad.net/yade/+question/690815
Dear all,
I'm trying to move my working environment to one with AMD cpu to take advantage
of the AMD ThreadRipper. Before that, I made a test with Ryzen 3700x and the
latest Ubuntu 20.04.
I'm installing the
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