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How to create uneven load for the processors using decomposePar utility.

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Old   May 14, 2014, 05:09
Default How to create uneven load for the processors using decomposePar utility.
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Gopal Shinde
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Hi Foamers,

I am interested in doing OpenFoam simulations on heterogeneous architecture wherein I want to exploit the system architecture to the fullest extent. For that I need uneven load for the processors.

Has anybody attempted this kind of task ?

I need your help on how to create uneven load for the processors using decomposePar utility. I have explored the option of scotch decomposition using processorWeights but it does not suffice my requirement. It creates almost same load for all the processors.

Also the communication between the processors is increased if I compare the decomposition stats using scotch method (with processorWeights) with the usual hierarchical or simple decomposition stats.

Please help.

-Gopal
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Old   May 24, 2014, 08:49
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Derek Mitchell
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Quote:
Originally Posted by shinde.gopal View Post
Hi Foamers,

I am interested in doing OpenFoam simulations on heterogeneous architecture wherein I want to exploit the system architecture to the fullest extent. For that I need uneven load for the processors.

Has anybody attempted this kind of task ?

I need your help on how to create uneven load for the processors using decomposePar utility. I have explored the option of scotch decomposition using processorWeights but it does not suffice my requirement. It creates almost same load for all the processors.

Also the communication between the processors is increased if I compare the decomposition stats using scotch method (with processorWeights) with the usual hierarchical or simple decomposition stats.

Please help.

-Gopal
have you used very large differences in processor weights e.g 1000:1
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