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Foundation ::
Parallel Computing ::
PETSc
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Changes and New Features in PETSc 2.1
- Changes in PETSc 2.1
- New Features in PETSc 2.1
Changes in PETSc 2.1
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General:
Simpler interface for structured grids, see src/snes/examples/tutorials/ex5.c
"System routines" including PLog..., Options..., Viewer...,
Draw...., FList...,OList... now all begin with the string Petsc. For
example, PetscOptionsGetInt() and PetscLogBegin().
The calling sequence for PetscMalloc() was changed to return and error code and
deliver the pointer as a new final argument. Due to this change, the macros CHKPTRA()
and CHKPTRQ() were dropped.
MAT (Matrices):
When using MatCreate(), you must follow with a MatSetType() or
MatSetFromOptions() before using the matrix.
Changed int MatShellSetOperation(Mat,MatOperation,void*);
to int MatShellSetOperation(Mat,MatOperation,void(*)());
Changed int MatShellGetOperation(Mat,MatOperation,void**);
to int MatShellGetOperation(Mat,MatOperation,void(**)());
Changed IncompleteCholesky to ICC
DA (Distributed Arrays):
Changed the DAMG routines to DMMG routines.
DAGetColoring() now has new second argument that takes either
IS_COLORING_GLOBAL or IS_COLOR_GLOBAL and a new third argument that takes the matrix type
of either MATMPIAIJ or MATMPIBAIJ.
VEC (Vectors):
Changed int VecSetOperation(Vec,VecOperation,void*);
to int VecSetOperation(Vec,VecOperation,void(*)());
Error Handling:
CHKERRA() is now obselete; use CHKERRQ() instead. Changed the calling
sequence of SETERRQ() to eliminate the second input parameter.
New Features in PETSc 2.1
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General:
Simpler interface for structured grids, see src/snes/examples/tutorials/ex5.c
Complete infrastructure for parallel multigrid for linear and nonlinear
problems on structured grids. See src/snes/examples/tutorials/ex19.c
Added manual pages for PETSc objects, enums etc. Added html version of
all source code and examples, accessable from docs/index.html and the manual
pages.
KSP (Krylov Subspace Methods):
Added support for "diagonal scaling" of preconditioned system
as required by most ODE integrators via PCDiagonalScaleSet().
MAT (Matrices):
Added the Henry Tufo/Paul Fischer libtfs scalable parallel direct solver
for MPIAIJ matrices.
Added routine MatFDColoringSetRecompute().
DA (Distributed Arrays):
Added DAVecGetArray() to access the multidimensional arrays directly in
the global parallel indexing. See src/snes/examples/tutorials/ex5.c and
ex19.c
Add DAGetLocalVector()/DARestoreLocalVector() for inexpensive
access to local work vectors.
VEC (Vectors):
Added VecPack routines to help with PDE optimization and multicomponent
PDEs.
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