[Pw_forum] Running parallel in some example of 2 cup is wrong?

[Duy Le]

2011/5/26 lucking-pine <songsong19840614 at gmail.com>:
> My computer is 2 cpu and 8 core of Dell. In some examples are crash. Such
> as:co.out of example 03 show that 'from d_&_i:error;some nodes have no k
> points'.
> And the environment_varibles of examples I set :
>
> PARA_PREFIX="mpiexec -n 8"
> PARA_POSTFIX="-npool 2"
>
> And how odd is when I set :
>
> PARA_PREFIX="mpiexec -n 4"
> PARA_POSTFIX="-npool 1"
>
You need understand the parallelism of QE before using it.
http://www.quantum-espresso.org/user_guide/node15.html

For example, it is obvious that if you have only one k-point, you can
not distribute it to 2 different pools.
--------------------------------------------------
Duy Le
PhD Student
Department of Physics
University of Central Florida.

"Men don't need hand to do things"


> the example 03 can be work.
>
> The similar case occur also in some of other examples.
>
>  Please tell what problem is…………thanks.
> ps:my compiler is:icc11.1.075,ifort11.1.075,mpich2,pwscf 4.2.1
> system is red hat enterprise linux 5
>
> Best
> Pine.
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