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[Liqing Jiao <question186108@xxxxxxxxxxxxxxxxxxxxx>]

Question #186108 on Yade changed:
https://answers.launchpad.net/yade/+question/186108

    Status: Expired => Open

Liqing Jiao is still having a problem:
Dear Anton,

I use yade-0.70.0. I think it should be very new. I just updated last
month. About "How many bodies are participating in your simulation? If
it is less than, for example, 10 000, it will not be effective to use
all 32 cores." you said, does it mean that the more particle more cores
will be better, right? What relationship between the particle amount and
the cores? Thank you very much. Looking forward to your reply.

Cheers, Liqing



At 2012-02-18 06:30:54,"Anton Gladky" <question186108@xxxxxxxxxxxxxxxxxxxxx> wrote:
>Question #186108 on Yade changed:
>https://answers.launchpad.net/yade/+question/186108
>
>Anton Gladky posted a new comment:
>Hi Liqing,
>
>2012/2/2 Liqing Jiao <question186108@xxxxxxxxxxxxxxxxxxxxx>:
>> ....
>> 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?
>>...
>
>How many bodies are participating in your simulation? If it is less
>than, for example, 10 000, it will not be effective to use all 32
>cores.
>
>What yade-version do you use? The yade-daily version after rev.3000
>has a better performance especially on many-thread simulations.
>
>Anton.
>
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