Re: repeated bands while using MPI-MPB

On Sun, 30 Apr 2006, Lingling Tang wrote:
> I am using MPI-MPB (Linux 2.4.21-37.0.1.EL, gcc 3.2.3, mpich) to analyze 
> 2D photonic crystal, such as supercell and line defect structure. It is 
> strange that for the same control file, I get different band digram when 
> I use one and two processors. The result got by one processor is 
> correct, while repeated bands are obtained if two processors are used. 
> For example, if num-bands is 16, 9th band to 16th is exactly the same as 
> 1st to 8th. I can never go to higher frequency by increasing num-bands. 
> Does anyone have any idea about this problem?

That doesn't make any sense to me.  Perhaps you are running it 
incorrectly?  You should use something like
 	mpirun -np 2 mpb-mpi foo.ctl

> Another problem with MPI-MPB is the first two dimensions transposed as 
> mentioned in user reference. Use mpb-data -r -n 32 epsilon.h5, I still 
> cannot get correct image (I can if use non-mpi version mpb). Is there 
> any thing wrong with my commands?

Just pass the -T option to mpb-data, as described in the manual.