[petsc-users] Ghost vector with MPIKOKKOS under DMSwarm

[MIGUEL MOLINOS PEREZ]

I’ll check the documentation more carefully to see if I can find this.

Thanks,
Miguel

On Jan 19, 2026, at 6:42 PM, Matthew Knepley <knepley at gmail.com> wrote:

On Mon, Jan 19, 2026 at 12:19 PM MIGUEL MOLINOS PEREZ <mmolinos at us.es<mailto:mmolinos at us.es>> wrote:
I don’t think so because DMSwarm data is allocated on host. This is right Matt?

I believe there is code in there to move it if you give a device type.

  Thanks,

     Matt

Thanks,
Miguel

On Jan 19, 2026, at 5:44 PM, Junchao Zhang <junchao.zhang at gmail.com<mailto:junchao.zhang at gmail.com>> wrote:

With VecCreateGhostWithArray, do you already have the array ready on device?

--Junchao Zhang


On Mon, Jan 19, 2026 at 6:56 AM MIGUEL MOLINOS PEREZ <mmolinos at us.es<mailto:mmolinos at us.es>> wrote:

Dear all,

I have a question about using DMSwarm data with Kokkos-enabled vectors.

My particle data (including ghost particles) are stored in a DMSwarm and for solver purposes I generate PETSc vectors using VecCreateGhostWithArray. I would like to use VecMPIKOKKOS for MPI+GPU computations. Am I correct that DMSwarm field memory cannot be directly wrapped into a VecMPIKOKKOS using VecCreateGhostWithArray or VecPlaceArray? Any idea on how to proceed?

Thanks in advance.

Best,

Miguel



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