[petsc-users] Doubt about mesh size distribution in DMDACreate3d using periodic boundary conditions

[Barry Smith]

   I modify src/dm/tests/ex25.c and always see a nice even split when possible with both DM_BOUNDARY_NONE and DM_BOUNDARY_PERIODIC

    Can you please send a reproducible example?

    Thanks

     Barry


> On Nov 19, 2024, at 6:14 AM, MIGUEL MOLINOS PEREZ <mmolinos at us.es> wrote:
> 
> Dear all:
> 
> It seems that if I mesh a cubic domain with “DMDACreate3d” using 8 bricks for discretization and with periodic boundaries, each of the bricks has a different size. In contrast, if I use DM_BOUNDARY_NONE, all 8 bricks have the same size. 
> 
> I have used this together with the DMSWarm discretization. And as you can see the number of particles per rank is not evenly distributed: 
> 210 420 366 732 420 840 732 1464
> 
> Am I missing something?
> 
> Thanks,
> Miguel
> 
> 
> <Screenshot 2024-11-19 at 10.56.36.png>

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