Dear Anton,
May I know the relationship between the number of the thread and the the number
of cores. For example, my computer has 32 CPUs, need I set the thread number to
be 32? In fact, I set it, but all CPUs are almost occupied 50%. The
effectiveness is just a little improved compared to the 4 cores desktop. And
the effectiveness of 32 CPUs is 1.5 times that of the 4 CPUs. How can I improve
it much more?
Looking forward to your reply.
Cheers, Liqing
At 2012-01-29 00:53:18,"Anton Gladky" <[email protected]>
wrote: >Question #186108 on Yade changed:
>https://answers.launchpad.net/yade/+question/186108 > > Status: Open =>
Answered > >Anton Gladky proposed the following answer: >Hi Liqing, > >to use a
parallelism on 0.70, you just need to put "-jN" parameter to >the command line.
Something like: > >yade-0.70 -j4 yourScript.py > >In this case 4 threads will
be used. But the effectiveness of >parallelisation is strong depended on the
task, you are using. For >some tasks it works better, for other you will get
even a slowdown. >Just try. > >> I read some relative documents about the >>
parallelism in yade. There are 3 levels. I don't know how to use others. If >>
some kind people realized already, could you please send me an example? >
>Well, the main "parallelism" is the "splitting" of some loops >(openmp), it
works automatically. > >Another opportunity is to use ParallelEngine [1]. But
you should be >careful with that one. > >Third, probably, is a batch-system
[2], I am personally using it a >lot. You can start several Yade-processes in
one time.t > >[1] https://www.yade-
>dem.org/doc/yade.wrapper.html?highlight=parallelengine#yade.wrapper.ParallelEngine
> >[2] http://bazaar.launchpad.net/~yade-
>dev/yade/trunk/files/head:/scripts/test/batch/ > >Anton > >-- >You received
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