Merge branch 'barry/2021-03-16/mat-factor-get-can-use-ordering' into 'main'

Change MatFactorGetUseOrdering() to MatFactorGetCanUseOrdering()

See merge request petsc/petsc!3739

Introduce PCFactorSetDefaultOrdering_Factor() to allow each factorization package
to indicate its preferered ordering, which may be external (its own) or one of PETSc.

This also affects factorizatio

Introduce PCFactorSetDefaultOrdering_Factor() to allow each factorization package
to indicate its preferered ordering, which may be external (its own) or one of PETSc.

This also affects factorization like dense PETsc where the ordering passed in by PETSc is ignored and not needed.

Also fixed options for MUMPS and SuiteSparse where users needed to pass a particular options database option
to the package (MUMP or KLU) indicating they should use the PETSc provided ordering. Now if the PETSc provided ordering is provided
these packages automatically use them without need a special option. This simplifies ordering usage for external packages

Commit-type: optimization, bug-fix, testing-fix, style-fix
/spend 6h

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Change MatFactorGetUseOrdering() to MatFactorGetCanUseOrdering()

We need to distinquish whether the package can use an external ordering and if that is desirable (the internal ordering may be faster

Change MatFactorGetUseOrdering() to MatFactorGetCanUseOrdering()

We need to distinquish whether the package can use an external ordering and if that is desirable (the internal ordering may be faster).

Commit-type: style-fix
/spend 15m

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Merge branch 'adams/cusparse-lu-band' into 'main'

Add cuSparse Band LU factorization

See merge request petsc/petsc!3713

Add cuSparse Band LU factorization

Merge remote-tracking branch 'origin/jczhang/add-DMDAVecGetKokkosOffsetView'

Add DMDAVecGetKokkosOffsetView and friends

See merge request petsc/petsc!3383

Rename -mat_cusparse_transgen to -mat_form_explicit_transpose

Merge branch 'stefanozampini/pcmg-matapply' into 'main'

PCMG matapply

See merge request petsc/petsc!3717

MATSEQAIJCUSPARSE: if MatSetFromOptions is not called these defaults are never set!

Merge branch 'jczhang/feature-nvshmem' into 'main'

Add SF NVSHMEM

See merge request petsc/petsc!3474

Add non-null PetscDefault{Cuda,Hip}Stream

Merge branch 'stefanozampini/fixes' into 'master'

Device fixes

See merge request petsc/petsc!3541

MATSEQAIJCUSPARSE: better handling of explicit transposition

keep track when the transposed matrix needs to be updated
call csr2csc only once, use thrust calls otherwise

MatAXPY_SeqAIJCUSPARSE: CUDA routines are buggy with 1 column!

MATSEQAIJCUSPARSE: add MatScale support

Merge branch 'stefanozampini/gamg-gpu-setup' into 'master'

MatMat operations with CUSPARSE

See merge request petsc/petsc!3391

MATSEQAIJCUSPARSE: add PetscInfo diagnostics for buffer size in MatMat operations

MatMatBackend: use device memory when populating the COO buffers

MatAXPY: add support for CUSPARSE

MatMatMPIAIJBACKEND: add few more options

do not copy CPU values down to GPU if not present!

MatGetLocalMatMerge: fix issues with thrust on SUMMIT

I suspect partition_copy is buggy

Mat: Move COO events out of CUSPARSE class

Fix a few typos in the code

MatSeqAIJCUSPARSEMergeMats: fix for CUDA < 10

Apply 7 suggestion(s) to 3 file(s)

MATSEQAIJCUSPARSE: remove copy to the CPU after GPU operations