Merge branch 'jolivet/feature-matproduct_atb-seqbaij' into 'main'

MatSeqBAIJ: add MatProduct_AtB implementation (B of type MatSeqDense)

See merge request petsc/petsc!8848

MatSeqBAIJ: add MatProduct_AtB implementation (B of type MatSeqDense)

Merge branch 'barry/2025-10-24/fix-dmshellsetdestroyctx' into 'main'

Finish converting the function prototypes of destroy for contexts to use PetscCtxDestroyFn

See merge request petsc/petsc!8810

Change names of Mat_XXX product contexts to MatProductCtx_XXX for code maintainability

Update destroy callback of all MatProductCtx and MatShellSetMatProductOperation() to use PetscCtxDestroyFn

Merge branch 'jolivet/cleanup-symbols' into 'main'

Do not expose unneeded symbols

See merge request petsc/petsc!8335

Do not expose unneeded symbols

Merge branch 'tisaac/feature-lmvm-rework' into 'main'

MatLMVM rework

See merge request petsc/petsc!6401

Mat: Fix and improve the performance of dense matrix multiplication

Mat: Add MATDENSEFROMVECTYPE constructor type

Now in a tests set you can do

```
testset:
args: -mat_type densefromvectype

Mat: Fix and improve the performance of dense matrix multiplication

Mat: Add MATDENSEFROMVECTYPE constructor type

Now in a tests set you can do

```
testset:
args: -mat_type densefromvectype
test: test_cuda
requires: cuda
args: -vec_type veccuda
test: test_hip
requires: hip
args: -vec_type vechip
```

(This assumes that you call `MatSetVecType()` before you call
`MatSetFromOptions()`)

Mat_MPIDense: Cache offsets of MatDenseGetSubMatrix() to avoid communication in more cases

Mat: Add missing implementations for internal "MatMultColumnRange()" interface

Mat_MPIDense: Fix the zeroing of buffers in multiplication routines

Mat_MPIDense: Add optimization of MatMatMult routines when all columns are owned by rank 0

The communication for intermediate buffers can be handled with allreduce / bcast operations,
but we use the PetscSF matvec context instead of MPI routines directly so that we will
use gpu-aware MPI if possible.

show more ...

CUPM: Fix some mult routines and make some small performance improvements

VecSeq_CUPM: Fix ::Dot, ::TDot, ::WAXPYAsync, and ::AXPBYAsync to work with non-device vectors

Mat_SeqDenseCUPM: fix ::SetR

CUPM: Fix some mult routines and make some small performance improvements

VecSeq_CUPM: Fix ::Dot, ::TDot, ::WAXPYAsync, and ::AXPBYAsync to work with non-device vectors

Mat_SeqDenseCUPM: fix ::SetRandom for hip

Mat_SeqDenseCUPM: implement conjugate on the device

Mat_SeqDenseCUPM: Fix MatMult() (and friends) when the vector is not on the device

This implementation assumes that the cost of moving the matrix to the
host is more expensive that moving the vector to the device, so temporary
device copies of the host vectors are used.

VecCUPM: Avoid device synchronization in some cases of ResetArray()

The documentation says that the PetscDeviceSynchronization() is
only needed if CopyToDevice_() resulted in a HtoD memcpy,
which would only happen if v->offloadmask == PETSC_OFFLOAD_CPU.
If we test this condition, we can avoid the synchronization.

This improves the peformance of MatDenseRestoreColumnVecWrite() in
performance critical loops.

CUPM: use thrust::hip::par_nosync

show more ...

Merge branch 'hsuh/dense-lmvm-squashed' into 'main'

Dense LMVM

See merge request petsc/petsc!7371

MatMult-ColumnRanges support added

Merge branch 'barry/2024-02-23/doc-trivial-mat' into 'main'

Bug fix, calling MatXXXSetPreallocation on MPI matrices after MatSetOption() loses the option value

See merge request petsc/petsc!7319

Trivial fix to MatSetValuesBlocked() manual page, spelling and spacing

Merge branch 'blanca/mat-mult-hermitian-transpose' into 'main'

Support for MatMultHermitianTranspose with MATDENSE, MATNEST and MATSCALAPACK

See merge request petsc/petsc!7171

Added MatMultHermitianTranspose and MatMultHermitianTransposeAdd for MATSEQDENSE and MATMPIDENSE

Merge branch 'jacobf/2023-08-17/header-guard-check' into 'main'

Check header guards

See merge request petsc/petsc!6822

Convert all header guards to pragma once

Merge branch 'jacobf/2023-06-13/mat-vec-more-cupm-functions' into 'main'

Add Some Missing Vec/Mat CUPM Functions

Closes #1399

See merge request petsc/petsc!6596

Add MatGetDiagonal_CUPM

Merge branch 'stefanozampini/h2opus-dmdakokkos' into 'main'

Add support for KOKKOS in H2OPUS

See merge request petsc/petsc!6408

Add MatCreateDenseForVecType

Remove old implementation (only in main) and update test

and a convenience internal routine to allocate the column vector when requested

Merge branch 'jacobf/2023-01-11/matdensecupm' into 'main'

Feature: MATDENSECUPM

See merge request petsc/petsc!6049

MatDense CUPM

Delete unused MatPtAPNumeric_SeqDense_SeqDense(), MatPtAPSymbolic_SeqDense_SeqDense(), and remove unused ptapwork member from Mat_SeqDense struct

Merge branch 'suyash/hip' into 'main'

Add HIP support to Mat class in PETSc

See merge request petsc/petsc!5383