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# Changes: 3.10
```{rubric} General:
```
- Removed --with-errorchecking configure option.
- Added new command line option -viewfromoptions to disable
`XXXViewFromOptions()` calls.
```{rubric} Configure/Build:
```
- Removed --with-viewfromoptions configure option in favor of the
new command line option -viewfromoptions.
- Following options are renamed to have more consistent names:
```
--with-packages-dir -> --with-packages-download-dir
--with-external-packages-dir -> --with-packages-build-dir
--package-dirs -> --with-packages-search-path
--search-dirs -> --with-executables-search-path
```
```{rubric} IS:
```
```{rubric} PetscDraw:
```
```{rubric} PF:
```
```{rubric} Vec:
```
```{rubric} VecScatter:
```
```{rubric} PetscSection:
```
```{rubric} Mat:
```
- MatNullSpaceTest() now respects the options prefix of the provided
Mat.
- Added MatMatTransposeSolve() to MUMPS interface.
- Added -mat_mumps_use_omp_threads [m] option to better support
OpenMP in MUMPS.
- Added MatPartitioningViewFromOptions().
- Added MatPartitioningApplyND() to compute a nested dissection
ordering of a matrix.
- Deprecated MatISGetMPIXAIJ() in favour of MatConvert().
- Added new matrix types for limited-memory variable-metric
(MATLMVM) approximations of Jacobians.
- Added MATAIJSELL, a sub-type of AIJ that uses SELL format
internally for SELL-optimized operations.
```{rubric} PC:
```
- PCKSPGetKSP() now raises an error if called on a PC which is not
of type PCKSP
- Added PCKSPSetKSP()
- Added new PC based on the new LMVM matrices.
```{rubric} KSP:
```
- The KSP viewing options have changed. Now
- -ksp_compute_eigenvalues becomes -ksp_view_eigenvalues ascii
- -ksp_plot_eigenvalues becomes -ksp_view_eigenvalues draw
- -ksp_plot_eigencontours becomes -ksp_view_eigenvalues
draw::draw_contour
- -ksp_compute_eigenvalues_explicitly becomes
-ksp_view_eigenvalues_explicit ascii
- -ksp_plot_eigenvalues_explicitly becomes
-ksp_view_eigenvalues_explicit draw
- -ksp_compute_singularvalues becomes -ksp_view_singularvalues
ascii
- -ksp_final_residual becomes -ksp_view_final_residual
- `KSPLSQR`
- Computes now an estimate of the operator's norm in the same way
as Saunders and MATLAB, and uses it in the type-specific
stopping criterion `KSPLSQRConvergedDefault()`; this now
gives the same number of iterations as MATLAB's `lsqr()`.
- Added `-ksp_lsqr_exact_mat_norm` and
`KSPLSQRSetExactMatNorm()` to optionally compute and use the
exact Frobenius norm instead of the estimate.
- `KSPLSQRMonitorDefault()` and `-ksp_lsqr_monitor` now
additionally print the (estimate of) the operator's norm.
- Allow setting `-ksp_convergence_test lsqr` (it's a default
for `KSPLSQR`, though).
- `KSPLSQRSetStandardErrorVec()` is replaced by
`KSPLSQRSetComputeStandardErrorVec()` which now specifies
whether standard error vector should be computed instead of
setting the vector;
- likewise, option `-ksp_lsqr_set_standard_error` is replaced
by `-ksp_lsqr_compute_standard_error`.
- Renamed `KSPLSQRGetArnorm()` to `KSPLSQRGetNorms()` and
removed its `rhs_norm` argument.
- Renamed `KSPLSQRDefaultConverged()` to
`KSPLSQRConvergedDefault()` merged with
`KSPConvergedLSQR()`.
```{rubric} SNES:
```
- SNESSetTolerances() and -snes_max_funcs now accept -1 to indicate
unlimited number of function evaluations.
```{rubric} SNESLineSearch:
```
```{rubric} TAO:
```
- Added bound-constrained Newton-Krylov methods (BNLS, BNTR, BNTL).
- All quasi-Newton methods updated to use the new LMVM Mat objects.
- Added a bound-constrained quasi-Newton line search (BQNLS) method
that re-uses BNLS infrastructure to replace BLMVM on next release.
- Bound-constrained conjugate gradient method expanded with new CG
update types and nonlinear preconditioning.
- Removed `-tao_type test`.
- Gradient testing can now be accessed with the options
`-tao_test_gradient`, `-tao_test_gradient_view`, and Hessian
testing can be done with `-tao_test_hessian`,
`-tao_test_hessian_view` (also works for matrix-free Hessian).
```{rubric} TS:
```
- Added symplectic time integrators for separable Hamiltonian
systems (-ts_type basicsymplectic).
```{rubric} DM/DA:
```
- Renamed `DMDAGetReducedDMDA()` to
`DMDACreateCompatibleDMDA()`.
- Added DMGetCompatibility() and implementation for DMDA
```{rubric} DMPlex:
```
- Added an interface DM and boundary label to
DMPlexCreateHybridMesh()
- More refined control of `DMView()` when
`PetscViewerType=PETSCVIEWERHDF5`. `PetscViewerFormat` can now
be one of
`{PETSC_VIEWER_HDF5_VIZ, PETSC_VIEWER_HDF5_XDMF, PETSC_VIEWER_HDF5_PETSC, PETSC_VIEWER_DEFAULT}`.
- Parallel mesh load (i.e. mesh distributed right from beginning)
with `DMLoad()`, `PetscViewerType=PETSCVIEWERHDF5` and
`PetscViewerFormat=PETSC_VIEWER_HDF5_XDMF`, or
`DMPlexCreateFromFile()` and `-dm_plex_create_from_hdf5_xdmf`.
```{rubric} PetscViewer:
```
Added argument to `PetscViewerVTKAddField()` to allow skipping of
DM check as fields are added
.. rubric:: SYS:
```{rubric} AO:
```
```{rubric} Sieve:
```
```{rubric} Fortran:
```
|
