============ 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 and -pc_factor_shift_amount . - 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 aswell] - use petsc and use petscdef are now use petscsys and use petscsysdef .. rubric:: ExternalPackages: - Added MATORDERING_AMD for Tim Davis' Approximate Minimum Degree package.