Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
Status: Answered => Solved
yang yi confirmed that the question is solved:
Bruno Chareyre (bruno-chareyre)
Thank you very much. It is not a good news for me. OK. I will try.
Thank youo
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Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
Bruno Chareyre proposed the following answer:
> the parallel programming, means there are 98 programming copies, and
each copy for a cores. If my understanding right or not?
More or less.[1]
> If I increase the
Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
yang yi posted a new comment:
To Bruno Chareyre (bruno-chareyre):
Thank you very much. I test -j1 and -j8 on my PC, yes. the speed is
the same. And I test the command ~$ export OMP_NUM_THREADS=1 and the
res
Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
Bruno Chareyre proposed the following answer:
> I understand you suggestion to get the optimal price of cores. But now
for me, to get the fastest speed of the simulation is the aim.
Yes. That's exactly my point.
Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
yang yi posted a new comment:
To Jan Stránský (honzik) and Bruno Chareyre (bruno-chareyre) :
Thank you very much for you professional response.
My the simulation process likes this:
The two kinds of pa
Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
Bruno Chareyre proposed the following answer:
> Start the script by the 'start' button on the Controller(), without
"3D" show [...] did 10 iteration test [...] Because I get the time by
hand, so there is errors
Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
Jan Stránský proposed the following answer:
> -j32 26.1s
> -j48 24.51s
> -j90 23.27s \ 23.72s
> -j92 23.05s \ 23.76s \ 24.24s \ 24.09s
> the -j92 or -j90 maybe the optimal jobs
pretty much depending on the defin
Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
yang yi posted a new comment:
Janek Kozicki (cosurgi) , Jan Stránský (honzik) , Bruno Chareyre
(bruno-chareyre)
Thank you very much for answer my question. According to your
suggestion, I checked the server
Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
Bruno Chareyre posted a new comment:
> If the performance is just depend on a core, that is a very terrible
message to me
Not really. The message was: 1/ of course you don't automatically gain speedup
by using
Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
Bruno Chareyre proposed the following answer:
Ah: and it is absolutely critical that you keep GUI turned *off*.
Else the comparisons are meaningless, you could be testing the GPU. You don't
use GUI for long simu
Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
Bruno Chareyre proposed the following answer:
> So I use 96 core.
Maybe it is a bad idea. Or maybe it is ok but it doesn't give much more
compared to, say, 48.
OpenMP may have an optimum somewhere and maybe it
Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
Janek Kozicki posted a new comment:
Sorry, that was written in a hurry. I mean that you can use these two
commands to measure the computer performance using a standardized test.
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Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
Jan Stránský posted a new comment:
> But I need a faster speed for the simulation by parallel computation.
So I use 96 core.
Would another usage of the power be meaningful, e.g. running in parallel
12 simulation
Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
Janek Kozicki posted a new comment:
run this command:
yade --stdperformance -j8
or this command:
yade --quickperformance -j8
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Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
yang yi posted a new comment:
1. Jan Stránský (honzik)
Than you very much for you quickly response. I explain as the follows
(1) The script
The script must import torch. The code is use to simulated particle
Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
Janek Kozicki posted a new comment:
If you have a recent yade version you can do yade --stdperformance -jN
benchmark, with same N on both systems. If the speed is not stable,
because some different programs are r
Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
Bruno Chareyre proposed the following answer:
Hi,
What you observe is actually expected:
XEON 4, 3.2GH
I7 3.6GH
The I7 is faster. HPC rarely outperform personal computers in per-core
performance.
Arguably, you
Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
Son Pham Thai proposed the following answer:
Hi,
i have also used remote desktop PC to run yade. You should be very
clear on which one you think that it is slow: (1). YADE simulation
(running in the command win
Question #690973 on Yade changed:
https://answers.launchpad.net/yade/+question/690973
Status: Open => Answered
Jan Stránský proposed the following answer:
Hello,
TLTR: do not compare -j8 and -j96, compare -j8 for both systems.
Difference of -j8 and -j96 is another problem not much related to
New question #690973 on Yade:
https://answers.launchpad.net/yade/+question/690973
Dear friend
I meet a very strange question. Our Lab. take a new server and I install
the yade on the server. But I find that running on the server is slower than on
the PC.
(1) The hardware and configura
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