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CHANGES in the PETSc Development Version

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 PetscLayoutInitialize() and it now allocates the space of the object.

• PetscLogFlops(int) ->PetscLogFlops(PetscLogDouble). [check fortran usage]
  

IS:

Vec:

VecScatter:

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_NONZERO_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

• 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.

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.
  

SNES:

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.

DA:

• DAGetColoring() now takes a MatType as an additional argument, should be MATAIJ or MATBAIJ

DMMG:

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.

AO:

Sieve:

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]
  

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