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============
Changes: 3.1
============
.. rubric:: General:
- PetscOptionsHasName() and PetscOptionsName() now return PETSC_TRUE
if the options are set to any value, include false or 0. You may
need to change some of your PetscOptionsXXName() to
PetscOptionsXXTruth()
- Added configure option --with-single-library that causes all PETSc
code to be compiled into the single library libpetsc.XXX
- PetscMap changed to PetscLayout and PetscMapInitialize() changed
to PetscLayoutCreate() and it now allocates the space of the
object.
- In makefiles include ${PETSC_DIR}/conf/base is replaced with two
lines include ${PETSC_DIR}/conf/variables and include
${PETSC_DIR}/conf/rules
- BlockSolve95 interface is removed
- petsc.h and petscdef.h are replaced with petscsys.h and
petscsysdef.h; while petsc.h now includes ALL PETSc include files.
- win32fe [used for MS/Intel compiler builds on windows] now
defaults to 'noautodetect' mode. However the previous behavior can
be restored by using the option '--autodetect'. For eg:
'--withcc=win32fe cl --autodetect'. This works primarily with old
VC6/VC7/Intel8 etc compilers anyway.
.. rubric:: Logging:
- PetscLogFlops(int) ->PetscLogFlops(PetscLogDouble). [check fortran
usage]
.. rubric:: config/configure.py:
- All ./configure options that state known values, so that
./configure doesn't try to test for them. Often used with the
--with-batch option now begin with --known-
.. rubric:: IS:
.. rubric:: Vec:
.. rubric:: VecScatter:
.. rubric:: Mat:
- MatGetSubMatrix:
- Now takes a parallel IS for the columns, the csize argument has
been dropped. The local part of this IS corresponds to the
local columns of the new submatrix.
- MatGetSubMatrixRaw
- Removed, use MatGetSubMatrix
- Changed name of option MAT_KEEP_ZEROED_ROWS to
MAT_KEEP_NONZERO_PATTERN to more clearly indicate what it does.
- Added MAT_SHARE_NONZERO_PATTERN as option for MatDuplicate() this
allows several matrices to share the same data structures for the
nonzeros and thus save memory.
- The function provided to MatNullSpaceSetFunction() now takes a
MatNullSpace() as the first argument. Added Fortran interface for
this function as well.
- Removed MatPBRelax() merged its functionality into MatRelax()
- Changed MatRelax() to MatSOR() to match MatSORType() and PCSOR
- Removed requirement that rows be sorted in
MatCreateMPIAIJWithArrays() and MatMPIAIJSetPreallocationCSR().
- Changed MATOP_DIAGONAL_SHIFT to MATOP_DIAGONAL_SET to match
function name MatDiagonalSet().
- MATMPIROWBS i.e BlockSolve95 interface is now removed.
.. rubric:: PC:
- PCShell All user-provided functions now have PC as first argument
instead of the application context. Users should obtain the
context with PCShellGetContext, similar to MatShell.
- Removed -pc_asm_in_place and PCASMSetUseInPlace() since the option
made no sense
- PCApplyRichardson() has an additional argument indicating if the
initial guess being passed in is nonzero. SOR will save some work
if it is zero.
- MatSetBlockSize() is no longer an error for BAIJ matrices, but the
argument must be the same as when the matrix was preallocated.
- PCFactorSetPivoting() renamed to PCFactorSetColumnPivot()
- Replaced PCFactorSetShiftNonzero(), PCFactorSetShiftPd() and
PCFactorSetShiftInBlocks() with PCFactorSetShiftType() and
PCFactorSetShiftAmount(). Replaced -pc_factor_shift_nonzero,
-pc_factor_shift_positive_definite and -pc_factor_shift_in_blocks
with -pc_factor_shift_type <shifttype> and -pc_factor_shift_amount
<shiftamount>.
- Added PCREDISTRIBUTE for load balancing and removal of Dirichlet
degrees of freedom.
.. rubric:: KSP:
- Added KSPCGUseSingleReduction() -ksp_cg_single_reduction;
recommended for use with many processors when VecDot() starts to
take a large amount of time, Requires 2 extra work vectors.
- Added KSPGCR (Generalized Conjugate Residuals), a flexible method
(like FGMRES) providing inexpensive residuals.
.. rubric:: SNES:
.. rubric:: TS:
- Rename TS_EULER, TS_BEULER, etc like TSEULER for consistency with
other packages.
- Add Theta and General Linear time integrators (TSTHETA, TSGL).
These can be used for solving differential algebraic equations
(DAE) using the new TSSetIFunction() and TSSetIJacobian().
- Add TSSSP which implements optimal strong stability preserving
time integrators of order 2, 3, and 4 using a low-storage explicit
Runge-Kutta scheme.
- Change TSSetPreStep() and TSSetPostStep() to run before and after
each step instead of before and after each solve.
.. rubric:: DA:
- DAGetColoring() now takes a MatType as an additional argument,
should be MATAIJ or MATBAIJ
- Added DARefineHierarchy(), DMMG now always uses DMRefineHierarchy
to generate refined grids. Added options
-da_refine_hierarchy_[xyz] to allow semi-coarsening at some levels
of the hierarchy.
- DASetCoordinates() now references the vector, so the user should
release their reference by calling VecDestroy().
.. rubric:: DMMG:
.. rubric:: PetscViewer:
.. rubric:: SYS:
- PetscSleep(), PetscDrawGetPause(), and PetscDrawSetPause() now
take PetscReal instead of int. Also, -draw_pause takes a real
value.
- PetscRandomGetValueImaginary() is removed. To get a complex number
with only a random imaginary part first call
PetscRandomSetInterval() with the same low and high real part.
Similarly one can obtain a complex number with only a random real
part by setting the low and high imaginary part to be the same.
.. rubric:: AO:
.. rubric:: Sieve:
.. rubric:: Fortran:
- Removed the old compiler dependent implementation of f90 interface
sources in favor of the new compiler independent implementation.
Consequently the configure option --with-f90-interface is removed.
And the f90 interface is automatically built - if an f90 compiler
is detected. [this is the default behavior before this change
as well]
- use petsc and use petscdef are now use petscsys and use
petscsysdef
.. rubric:: ExternalPackages:
- Added MATORDERING_AMD for Tim Davis' Approximate Minimum Degree
package.
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