coll/ucc: fix ucc resource leak on MPI_Finalize#13767
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janjust wants to merge 1 commit intoopen-mpi:mainfrom
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coll/ucc: fix ucc resource leak on MPI_Finalize#13767janjust wants to merge 1 commit intoopen-mpi:mainfrom
janjust wants to merge 1 commit intoopen-mpi:mainfrom
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All UCC team teardown and context/library finalization was driven by a communicator attribute delete callback on MPI_COMM_WORLD. OMPI commit b79004e (v5: 6a581ad) intentionally skips user-defined attribute callbacks on MPI_COMM_WORLD during MPI_Finalize to fix a PETSc deadlock (sec. open-mpi#12035), so ucc_context_destroy / ucc_finalize were never called. Remove the communicator attribute mechanism entirely: - Call ucc_team_destroy() directly from mca_coll_ucc_module_destruct(), which fires for every communicator including MPI_COMM_WORLD regardless of OMPI version. - Add mca_coll_ucc_finalize_ctx() and call it from the MPI_COMM_WORLD module destructor. ompi_comm_destruct() releases coll modules (firing destructors) before releasing c_local_group or calling PML del_comm, so MPI_COMM_WORLD is still fully functional for ucc_context_destroy's OOB allgather at that point. mca_coll_ucc_close() retains the call as an idempotent safety net. Signed-off-by: Tomislav Janjusic <[email protected]>
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All UCC team teardown and context/library finalization was driven by a
communicator attribute delete callback on MPI_COMM_WORLD. OMPI commit
b79004e (v5: 6a581ad) intentionally skips user-defined attribute
callbacks on MPI_COMM_WORLD during MPI_Finalize to fix a PETSc deadlock
(sec. #12035), so ucc_context_destroy / ucc_finalize were never called.
Remove the communicator attribute mechanism entirely:
Call ucc_team_destroy() directly from mca_coll_ucc_module_destruct(),
which fires for every communicator including MPI_COMM_WORLD regardless
of OMPI version.
Add mca_coll_ucc_finalize_ctx() and call it from the MPI_COMM_WORLD
module destructor. ompi_comm_destruct() releases coll modules (firing
destructors) before releasing c_local_group or calling PML del_comm,
so MPI_COMM_WORLD is still fully functional for ucc_context_destroy's
OOB allgather at that point. mca_coll_ucc_close() retains the call as
an idempotent safety net.