Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Linked to bug: #1160304
https://bugs.launchpad.net/bugs/1160304
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Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Removed link to bug: #1160304
https://bugs.launchpad.net/bugs/1160304
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Sorry for that. This is our wiki server crashing again.
Remi is kind enough to restart the server when it occures, but the
problem is still there. It works for some time, then crash again.
I hope you will have more luck next time soon.
B
On 19/03/13 13:06, Eugen Kubowsky wrote:
Question #215540
Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Eugen Kubowsky posted a new comment:
well, I proudly present the latest results of Christian Jakobs Tests with
additional Yade Timing Stats.
[can you please activate my yade-wiki account, so that I can put it
You are wiki member Eugen,
Here is a first screenshot:
http://s7.directupload.net/images/130315/ns9gpq39.png
On the x-axis of the stacked bar charts you'll find count of Collider vs.
Iterations done.
For example:
-one core and 1000 particles: collider runs 17 times out of 1100
Very
Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Eugen Kubowsky posted a new comment:
Ah ok, I see that deactivating the collider is no solution. But what about this
idea:
- increase all Bouding boxes so that there will be a lot of pseudo-collisions
from
Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Jan Stránský posted a new comment:
Hi Eugen,
It should be possible, see InsertionSortCollider documentation
https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.InsertionSortCollider
namely
Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Bruno Chareyre posted a new comment:
increase all Bouding boxes so that there will be a lot of pseudo-
collisions
It is not only possible, it is done by default.
If you inspect timing stats you should see
Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Bruno Chareyre posted a new comment:
Thank you very much Eugen, this will be interesting.
As for deactivating InsertionSortCollider, it is easy (collider.dead=True). It
means stopping contact detection,
Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Eugen Kubowsky posted a new comment:
hi again,
I did a lot of performance tests during the last weeks. I'll post results in
some days.
@Bruno: you said, that InsertionSortCollider is main non-parallel engine
Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Eugen Kubowsky posted a new comment:
Ok, thanks for all the reply. As is thought performance is a hot topic in here
;)
first of all I'll provide you detailed graphs. Second I will give you results
for
Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Chareyre posted a new comment:
Thanks.
You could actually plot everything on the same graph more easily if y-axis was
cycles*Nparticles / time.
A conclusion from these results seems to be that parallelism
Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Chareyre posted a new comment:
I just commited a change in the performance script, removing 1st
iteration from the stats.
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Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Eugen Kubowsky posted a new comment:
Hey guys!
i guess its good to use this post for the results of the performance tests run
with our server.
it has the following configuration:
- 2xIntel Xeon E5-2687W @3.1GHz
Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Chareyre posted a new comment:
Thank you very much Eugene, this is useful.
Unfortunately the most interesting curve cannot be seen due to the scaling
(that one with the larger number of grains).
It would be
Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Anton Gladky posted a new comment:
2013/1/8 Eugen Kubowsky question215...@answers.launchpad.net:
So my questions are,
1) whether the --performance check is suitable for multi core systems
Yes, but initially
Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Christian Jakob posted a new comment:
Hi,
Thanks for this interesting results.
the server reaches its maximum performance between 8 and 14 cores.
As I can see from your picture, the optimal number of cores
Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Status: Open = Answered
Anton Gladky proposed the following answer:
Hi Riccardo,
you can start the test with the parameter -j8 to get the
approximated productivity of yade on your machine with 8 cores.
Question #215540 on Yade changed:
https://answers.launchpad.net/yade/+question/215540
Status: Answered = Solved
Riccardo carta confirmed that the question is solved:
Thanks Anton Gladky, that solved my question.
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