Question #682290 on Yade changed:
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Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Luc OGER gave more information on the question:
the last result without -DENABLE_MPI=OFF on OPENSUSE 15.1:
0b00 bb br gg gr rr
0b10 br gg gr
0b01 bb br gr
0b11 br gr
so the error link to MPI option is
Question #682290 on Yade changed:
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Luc OGER gave more information on the question:
complementary information: the two previous yade were made with UBUNTU
19!
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Question #682290 on Yade changed:
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Luc OGER gave more information on the question:
new information:
with the Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz Irecent computer) got the
same kind of answer :
with -DENABLE_MPI=OFF : bad results
without
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Luc OGER gave more information on the question:
I have just done a basic test with two different cmake option on my
UBUNTU 19 machine : enable-mpi=off or not
here the two answer for the #20 mask py program:
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Janek Kozicki posted a new comment:
Maybe check what is the linux kernel version in both of these cases? You
can check this with command “uname -a”
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Question #682290 on Yade changed:
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Janek Kozicki posted a new comment:
Only to clarify:
* the bug list on i7-2600 is the same as on i7-6700HQ
* AND the masks are working on i7-2600 AND not working on i7-6700HQ ?
I ask only because I would
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Luc OGER gave more information on the question:
here the bug for the new intel AND also the old one: same list!!
bugs: cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds
swapgs
full old
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Janek Kozicki posted a new comment:
in #34 you have pasted CPUINFO. There is line „bugs: ” but this line
is missing in #36. And I don’t know if there are no processor bugs, or
if you simply did not paste
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Luc OGER gave more information on the question:
Here the cmake comannd which is really the simplest one :
cmake DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_INSTALL_PREFIX=../install
-DPYTHON_VERSION=3
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Janek Kozicki posted a new comment:
I just had another idea: maybe it depends on the linux kernel version.
There were several vulnerabilities discovered in Intel processors. One
of the called „rowhammer” was a
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Bruno Chareyre posted a new comment:
>so results only controled from bit in position 0 at right side
little endian vs. big endian?...
The most suprizing in all this is that Luc can reproduce the problem on
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Luc OGER gave more information on the question:
Strange behaviour :
2 UBUNTU 19 environments on two differents machines:
the same compiler option and the same yade-2019-08-26
result
--on an old machine (cpu
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Status: Answered => Open
Luc OGER is still having a problem:
Hi,
i have compiled yade-2019-08-25.git-0f74746 and run again the test #20... and
this time the results is quite different!:
mask=0b00 : bb br
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Luc OGER posted a new comment:
I have tried with two very different machines:
laptop : hp envy and server Dell R960
BUT I got the same answer???
here the CPUINFO:
server Dell :
processor : 127
vendor_id
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Janek Kozicki requested more information:
This is more and more strange. Because now I start to suspect the
hardware. What is the processor model in your computer? You can use `cat
/proc/cpuinfo` to find out.
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Luc OGER posted a new comment:
it is only a "basic" one :
cmake -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_INSTALL_PREFIX=../install
-DPYTHON_VERSION=3 -DDISABLE_SAVE_TEMPS=1 -DENABLE_MPI=OFF ../trunk
and to extend
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Janek Kozicki posted a new comment:
Also, Jan, perhaps it would be useful for us to turn your example into a
`yade --check` script?
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Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Janek Kozicki requested more information:
So we know it is not the linux distribution. Because Luc has the same
problem also on ubuntu 19. So it just occurred to me that maybe it is
some of the compiler flags
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Status: Open => Answered
Jan Stránský proposed the following answer:
Thanks for testing and output.
The results corresponds to your description of either all or none interactions.
Now we (at least I) can be
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Luc OGER gave more information on the question:
I have run #20
and the answer is strange :
Mask=0b00 : bb br gb gg gr rr
Mask=0b10 : bb br gb gg gr rr
Mask = 0b01 or 0b11 = no line ouput ??
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Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Status: Needs information => Open
Luc OGER gave more information on the question:
Same as reply in#9 every sphere passed through or every sphere interact
with all the others
OK I will try tu write as #19
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Status: Open => Needs information
Jan Stránský requested more information:
> I got exactly the same behavior
same as what?
> Jan'remark about the luck?
my remark was only about the order of commands. It
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Status: Needs information => Open
Luc OGER gave more information on the question:
I have installed UBUNTU 19 on one USB HDD and compiled the last yade:,
yade-2019-08-11
Then I have run my py code... And I
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Status: Open => Needs information
Jan Stránský requested more information:
Hi Luc,
my code is just to test the interactions and print it in an understandamble,
unambiguous, reproducible.. way.
the 10
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Status: Answered => Open
Luc OGER is still having a problem:
I am using only the basic cmake option plus MPI=OFF only
I have tried with several vesion or Yade but alwaays with OpenSuse 15.1
after my
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Status: Open => Answered
Bruno Chareyre proposed the following answer:
This thread is definitely about Luc getting a completely different behaviour on
a particular OS.
And it suggests that bitwise
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Status: Answered => Open
Luc OGER is still having a problem:
aSIMask=0b00 full interaction
aSIMask=0b01 full no interaction
aSIMask=0b10 full interaction
aSIMask=0b11 full no interaction
full no
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Bruno Chareyre proposed the following answer:
I tried again with yadedaily (2018.02b-290bf6a54e~xenial), the results
are correct again.
@Luc, can't you try on a different computer to be sure we are on the
same
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Status: Open => Answered
Jan Stránský proposed the following answer:
Hi guys,
sorry for coming late to the discussion.
what is "full interaction", "full no interaction" and "ful or zero
interactions"?
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Luc OGER gave more information on the question:
I have just tried with yade-2019-08-08.git-775ae74 and I got the same
problem!!
I guess that some compiler options are not going well in some bit test?
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Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Status: Answered => Open
Luc OGER is still having a problem:
It is a july version
Like 12-07
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Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Status: Open => Answered
Bruno Chareyre proposed the following answer:
I meant to type collider.avoidSelfInteractionMask=X after reloading the scene,
not before.
But I guess that's what you do already.
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Luc OGER gave more information on the question:
Dear Bruno,
As I don't know what is this function "avoidSelf_after_reloading" I
have not played with it.
how i can check its value or its rule?
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Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Bruno Chareyre posted a new comment:
I'm using Yade 2019-08-07.git-c9e148a here, but the "avoidSelfInteractionMask"
code did not change in the last years.
Not sure which is 1st and which is 5th column, but with
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Status: Answered => Open
Luc OGER is still having a problem:
When I run it on my computer this is not what I get :
in the 5th column with avoidSelf=1 all the three balls on top of the blue
fixed one
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Status: Open => Answered
Bruno Chareyre proposed the following answer:
As far as I understand you have mask= 2, 1, and 3.
At this point the possible interactions are 1-1, 2-2, 3-1, 3-2, 3-3.
The impossible
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Janek Kozicki posted a new comment:
It is this one btw, that needs simplification: https://yade-
dev.gitlab.io/-/trunk/-/jobs/268573829/artifacts/install/share/doc/yade-
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Janek Kozicki posted a new comment:
I don't understand. Do you want blue to interact with other blue or not?
Maybe you need to change the color (actually the bitmask) of these at
the bottom?
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Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Status: Answered => Open
Luc OGER is still having a problem:
sorry for the creation of this long discussion but i am still not happy with
the results of this Collider.avoidSelfInteractionMask
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Bruno Chareyre proposed the following answer:
Well, questions on bitmasks happen indeed, questions on
avoidSelfInteractionMask are not really frequent AFAIK.
This is my suggestion (a shorter rephrasing of the
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Janek Kozicki posted a new comment:
I started this MR, because I had a feeling that this question is asked more
often than necessary. I am not sure though if this is the right place for these
detailed
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Bruno Chareyre posted a new comment:
Also, for consistency, let's keep masks as integers in the doc.
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Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Bruno Chareyre posted a new comment:
Is there really anything missing in the original doc?
I would actually remove the last words of it :
"This mask is used to avoid the interactions inside a group of particles.
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Janek Kozicki proposed the following answer:
Thank you Jerome for your great explanations. Maybe you and Luc Oger can
think of a better description into the documentation about this? You can
write as much as you
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Jérôme Duriez proposed the following answer:
It again turns out that both #1 and #2 are somewhat incorrect... (thank
you Jan Stransky !)
I overlooked the fact that interaction possibility depends on mask
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Jérôme Duriez proposed the following answer:
It turns out my example in #1 is incorrect because of a somewhat special
treatment of 0b00 in binary comparisons (see also [*])..
Let me rephrase again:
for 3 mask
Question #682290 on Yade changed:
https://answers.launchpad.net/yade/+question/682290
Status: Open => Answered
Jérôme Duriez proposed the following answer:
Hi,
As far as I'm concerned I did not completely get your objectives/question,
sorry..
Just to rephrase the doc, and in your example
New question #682290 on Yade:
https://answers.launchpad.net/yade/+question/682290
Hello,
I am trying to setup properly the possible interaction between different group
of sphere: some can interact with other, some cannot interact with themselves
here the basic code
# basic simulation showing
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