The code is the right place to look. For example
https://urldefense.us/v3/__https://gitlab.com/petsc/petsc/-/blob/main/src/dm/impls/swarm/swarm.c?ref_type=heads*L307__;Iw!!G_uCfscf7eWS!emacIq_C5LrJ9eKK6yorz6jJyo8M_O8C6rorvSoed1o5-YpahunkVoQsWH597yayOS4SQZA4lpT4aU_jvqTs$ So the Vec will get the right type. This means that when the initial data comes in on the host, it will be copied to the device when we execute an operation. We (really Joe) are working on an update that allows swarm data to be held on the device. Thanks, Matt On Mon, Jan 19, 2026 at 1:22 PM MIGUEL MOLINOS PEREZ <[email protected]> wrote: > 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 <[email protected]> wrote: > > On Mon, Jan 19, 2026 at 12:19 PM MIGUEL MOLINOS PEREZ <[email protected]> > 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 <[email protected]> >> 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 <[email protected]> >> 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 >>> >> >> > > -- > What most experimenters take for granted before they begin their > experiments is infinitely more interesting than any results to which their > experiments lead. > -- Norbert Wiener > > https://urldefense.us/v3/__https://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!emacIq_C5LrJ9eKK6yorz6jJyo8M_O8C6rorvSoed1o5-YpahunkVoQsWH597yayOS4SQZA4lpT4acYVZicG$ > > <https://urldefense.us/v3/__http://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!emacIq_C5LrJ9eKK6yorz6jJyo8M_O8C6rorvSoed1o5-YpahunkVoQsWH597yayOS4SQZA4lpT4aUPnGZJ2$ > > > > > -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener https://urldefense.us/v3/__https://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!emacIq_C5LrJ9eKK6yorz6jJyo8M_O8C6rorvSoed1o5-YpahunkVoQsWH597yayOS4SQZA4lpT4acYVZicG$ <https://urldefense.us/v3/__http://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!emacIq_C5LrJ9eKK6yorz6jJyo8M_O8C6rorvSoed1o5-YpahunkVoQsWH597yayOS4SQZA4lpT4aUPnGZJ2$ >
