On Sat, Feb 18, 2023 at 12:00 PM Mike Michell <[email protected]> wrote:
> As a follow-up, I tested: > > (1) Download tar for v3.18.4 from petsc gitlab ( > https://gitlab.com/petsc/petsc/-/tree/v3.18.4) has no issue on DMPlex > halo exchange. This version works as I expect. > (2) Clone main branch (git clone https://gitlab.com/petsc/petsc.git) has > issues with DMPlex halo exchange. Something is suspicious about this main > branch, related to DMPlex halo. The solution field I got is not correct. > But it works okay with 1-proc. > > Does anyone have any comments on this issue? I am curious if other DMPlex > users have no problem regarding halo exchange. FYI, I do not declare ghost > layers for halo exchange. > There should not have been any changes there and there are definitely tests for this. It would be great if you could send something that failed. I could fix it and add it as a test. Thanks, Matt > Thanks, > Mike > > >> Dear PETSc team, >> >> I am using PETSc for Fortran with DMPlex. I have been using this version >> of PETSc: >> >>git rev-parse origin >> >>995ec06f924a86c4d28df68d1fdd6572768b0de1 >> >>git rev-parse FETCH_HEAD >> >>9a04a86bf40bf893fb82f466a1bc8943d9bc2a6b >> >> There has been no issue, before the one with VTK viewer, which Jed fixed >> today ( >> https://gitlab.com/petsc/petsc/-/merge_requests/6081/diffs?commit_id=27ba695b8b62ee2bef0e5776c33883276a2a1735 >> ). >> >> Since that MR has been merged into the main repo, I pulled the latest >> version of PETSc (basically I cloned it from scratch). But if I use the >> same configure option with before, and run my code, then there is an issue >> with halo exchange. The code runs without error message, but it gives wrong >> solution field. I guess the issue I have is related to graph partitioner or >> halo exchange part. This is because if I run the code with 1-proc, the >> solution is correct. I only updated the version of PETSc and there was no >> change in my own code. Could I get any comments on the issue? I was >> wondering if there have been many changes in halo exchange or graph >> partitioning & distributing part related to DMPlex. >> >> Thanks, >> Mike >> > -- 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://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
