[petsc-dev] DMPLEX with VecGhost

Barry Smith bsmith at petsc.dev
Thu Oct 28 08:37:23 CDT 2021


    How difficult would it be to rework DMPLEX to allow the use of VecGhost? We have performance problems with GPUs with simple DMNETWORK models because the code spends more time uselessly copying the local part of the vector to another vector in global to local and local to global;  more than 1/2 the time of the total simulation.


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