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# Changes: 2.3.0
```{rubric} General:
```
- The equivalent of building BOPT=g, BOPT=O versions for
PETSC_ARCH=linux-gnu is now: config/configure.py [options]
-PETSC_ARCH=linux-gnu config/configure.py [options]
--with-debugging=0 -PETSC_ARCH=linux-gnu-opt
- Python bindings added to PETSc. To use, configure with:
--with-python=1 ---with-shared=1 To build, use: 'make python'
after building PETSc libraries. Example in
src/snes/examples/tutorials/ex1.py
- Options database keys -trmalloc[\_xxx] are changed to -malloc[\_xxx]
- -get_resident_set_size and -trinfo are changed to -memory_info
- PetscTrValid() -> PetscMallocValidate(), PetscTrDebug() ->
PetscMallocDebug()
- -trdebug -> -malloc_debug
- PetscGetResidentSetSize() -> PetscMemoryGetCurrentUsage(), added
PetscMemoryGetMaximumUsage() and PetscMemorySetGetMaximumUsage()
- PetscTrSpace() -> PetscMallocGetCurrentUsage() and
PetscMallocGetMaximumUsage()
- added PetscOptionsEnum() and PetscOptionsGetEnum()
- added PetscBag object for managing user created structs including
initializing them and serializing them.
- removed PetscSetCommWorld(). Now you can directly assign to
PETSC_COMM_WORLD before PetscInitialize().
```{rubric} Vec:
```
- Faster generation of VecScatter for many processes when indices
are mostly sorted
- Changed BLAS-type interfaces to PETSc-style:
- VecShift
- VecScale
- VecSet
- VecSetRandom
- VecAXPY
- VecAXPBY
- VecAYPX
- VecMAXPY
- VecWAXPY
- Changed order of arguments in pointwise routines:
- VecPointwiseMult
- VecPointwiseMax
- VecPointwiseMin
- VecPointwiseMaxAbs
- VecPointwiseDivide
```{rubric} Mat:
```
- Changed MatConvert to require a reuse parameter to denote inplace
conversion
- Added Cholesky and ICC support to SeqBAIJ
- Added the argument MatFactorInfo to MatLUFactorNumeric() and
MatCholeskyFactorNumeric()
- Faster MatSetValues()
- Faster parallel-matrix vector products
- Changed MatCreate() to take only a communicator
- Added MatSetSize() to specify matrix sizes
- Changed BLAS-type interfaces to PETSc-style:
- MatAXPY
- MatAYPX
- MatScale
- MatShift
- Change MatZeroRows() and MatZeroRowsLocal() to use arrays, and
added IS versions
```{rubric} PC:
```
- Added PCILUReorderForNonzeroDiagonal() and
PCLUReorderForNonzeroDiagonal()
- Replace PCLUSetDamping(), PCILUSetDamping(),
PCCholeskySetDamping() and PCICCSetDamping() by
PCFactorSetShiftNonzero(). Change the option database keys
-pc_lu_damping, -pc_ilu_damping, -pc_cholesky_damping and
-pc_icc_damping to -pc_factor_shift_nonzero
- Replace PCLUSetShift(), PCILUSetShift(), PCCholeskySetShift() and
PCICCSetShift() by PCFactorSetShiftPd(). Change the option
database keys -pc_lu_shift, -pc_ilu_shift, -pc_cholesky_shift and
-pc_icc_shift to -pc_factor_shfit_positive_definite
- PCMG: will automatically using the outer pmat operator to define
the finest level operator if not user supplied
- PCMG: added MGUseGalerkin(), -pc_mg_galerkin option to have
coarser grid matrices computed from the finest grid matrix
- PCMG: now does referencing counting on set vectors and
restriction/interpolation matrices so user need not keep reference
to free later
- PCMG: if user does not provide restriction the interpolation is
used and vis versa
- PCMG: if user does not provide Vecs for each level, will
automatically provide them
- All routines that began with MG now begin with PCMG
- Added PCShellSet/GetContext() and removed the context passed into
PCSetApply() and PCSetApplyRichardson()
```{rubric} KSP:
```
- -ksp_cg_Hermitian and -ksp_cg_symmetric have been changed to
-ksp_cg_type Hermitian or symmetric
- Changed options for -ksp_gmres_cgs_refinement_type from never or
ifneeded or always to REFINE_NEVER or REFINE_IFNEEDED or
REFINE_ALWAYS
```{rubric} config/configure.py:
```
```{rubric} SNES:
```
- Changed the name and calling sequence for SNESSetLineSearchCheck()
to SNESLineSearchSetPostCheck() and added a
SNESLineSearchSetPreCheck()
- Changed the names of all SNESxxxxLineSearchyyyy() to
SNESLineSearchxxxxyyyy() per PETSc naming standard.
- Now allow a constant vector to be specified in SNESSolve()
- Removed the Vec argument from SNESSetUp()
- Corrected the order of function and context arguments in:
- SNESGetFunction()
- SNESGetJacobian()
```{rubric} TS:
```
```{rubric} DA:
```
- Added DAVecGet/RestoreArrayDOF() allowing indexing in the
dimension of degrees of freedom at each point on the lattice.
- Faster DAGlobalToLocal() etc for dof > 1.
```{rubric} DMMG:
```
- Consolidated DMMG functionality into the new header file
"petscdmmg.h".
```{rubric} SYS:
```
- PetscSetCommWorld() removed. [one can directly do PETSC_COMM_WORLD
= comm - before PetscInitialize()]
```{rubric} Fortran:
```
```{rubric} ExternalPackages:
```
- ML support added.
|
