[Wien] wien in parallel mode is slower than serial mode

[nilton@ufba.br]

Dear Florent,

Yes, I did your previous remark and it not work! This is the reason  
why I put that question again. And I sent one e-mail for your private  
e-mail address before, explaining this point. Thanks for your  
consideration and your wish to help me, but it is not enough to me. I  
raised the matrix size of that system on more than 10 times and the  
behavior is the same: lapw1 is faster, but lapw2 is very slower. If  
lapw2 write on the disk, lapw1 also to. So, why could lapw1 be faster  
and lapw2 not? This don't make sense. Also, the total time of the run  
in parallel running is bigger than in serial running as you com see in  
my prevous e-mail.

> My opinion is to use parallel calculations if you win something.
> Changing from 4hours to 1 hours by running on 4 nodes instead of 1 is
> efficient, but running on 15s instead of 60s... I am not sure it is and
> furthermore, I'm not sure it will justify the time that people will
> spend to answer your question.
I want not people stop yours job to answer my question, but I hope if  
someone had experience this problem and wants help me I will appreciate.
Regards and merry Christmas
Nilton
>
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> | Florent BOUCHER                    |                                    |
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