[petsc-users] EXTERNAL: Re: DMDAVecGetArrayF90

[Carol.Brickley at awe.co.uk]

Excellent - just remembered that. I'll see if it works. Had taken it out to do my own thing.

Carol

Dr Carol Brickley 
BSc,PhD,ARCS,DIC,MBCS
 
Senior Software Engineer
Applied Computer Science
DS+T,
AWE
Aldermaston
Reading
Berkshire
RG7 4PR
 
Direct: 0118 9855035
 

-----Original Message-----
From: Barry Smith [mailto:bsmith at mcs.anl.gov] 
Sent: 04 March 2015 18:38
To: Brickley Carol AWE
Cc: petsc-users at mcs.anl.gov
Subject: EXTERNAL: Re: [petsc-users] DMDAVecGetArrayF90


  DMDAGetCorners() for global vectors and DMDAGetGhostCorners() for local (ghosted) vectors.

   Barry

> On Mar 4, 2015, at 12:26 PM, <Carol.Brickley at awe.co.uk> <Carol.Brickley at awe.co.uk> wrote:
> 
> Hi,
> 
> I am using DMDAVecGetArrayF90 with a pointer in petsc 3.4.3. Is there anyway of finding out what the start and finish indices of the pointer coming back from this routine are per processor?
> 
> I have declared:
> 
> 
> DM                              ::   da
> Vec                             ::  X
> PetscScalar,pointer      :: xv(:,:)=>null()
> 
> 
> DMDAVecGetArrayF90(da,X,xv,ierr)
> 
> 
> Do j = 1, m
>  Do i = 1, n
>    xv(i-1.j-1) = rhs2d(i,j)
>  enddo
> enddo
> 
> 
> DMDAVecRestoreArrayF90(da,X,xv,ierr)
> 
> When we have xv(0:n-1,0:m-1) from DMDAVecGetArrayF90 it works fine but other processors may give back eg; xv(0:n-1,1:m-1) or something else and it will fail as the second index
> now goes below 0 to 1. Any ideas of what I can do next?
> 
> 
> Thanks,
> 
> Carol
> 
> 
> Dr Carol Brickley
> BSc,PhD,ARCS,DIC,MBCS
> 
> Senior Software Engineer
> Applied Computer Science
> DS+T,
> AWE
> Aldermaston
> Reading
> Berkshire
> RG7 4PR
> 
> Direct: 0118 9855035
> 
> 
> 
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AWE Plc
Registered in England and Wales
Registration No 02763902
AWE, Aldermaston, Reading, RG7 4PR