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<title>Documentation: Changes: 2.3.1</title>
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<div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<h1>Documentation: Changes: 2.3.1</h1>
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<h2><a name="CHANGES">CHANGES in PETSc 2.3.1</a></h2>
</div>
<h4>General:</h4>
<ul>
<li>-log_info is now just -info; PetscLogInfo...() is now PetscInfo...()</li>
<li>Added TOPS solver components. [requires CCA tools like babel]</li>
<li>Added supported for IBM BGL with optimzed fortran kernels</li>
<li>bin/petscarch is removed. Use can give any name to PETSC_ARCH. [if not - configure picks a default name]</li>
<li>PetscMap is no longer a public PETSc object</li>
</ul>
<h4>Vec:</h4>
<ul>
<li>
Changed prototypes for VecMDotBegin(), VecMDotEnd(), VecMTDotBegin(),
VecMTDotEnd() to confirm with PETSc prototype style
</li>
<li>ISColoringCreate() takes another argument</li>
</ul>
<h4>Mat:</h4>
<ul>
<li>MatScaleSystem() and MatUnscaleSystem() now take arguments b,x instead of x,b</li>
<li>Added MatSeqAIJSetPreallocationCSR(), MatGetSubMatrixRaw()</li>
<li>Added MatSolveTranspose() for superlu</li>
<li>Added support for matrix types MATCSRPERM, MATCRL - for vector based machines.</li>
<li>Added MatMatMult for seqdense</li>
<li>Added MatRealPart, ImaginaryPart for AIJ, BAIJ, SBAIJ matrices</li>
<li>Added MatGetRowUpperTriangular() to mpisbaij matrix</li>
</ul>
<h4>PC:</h4>
<ul>
<li>PCPrometheusSetCoordinates() changed to PCSetCoordinates()</li>
<li>Moved src/ksp/pc/pcimpl.h to include/petsc-private/pcimpl.h</li>
<li>PCPreSolve() and PCPostSolve() now consistently take arguments b,x before sometimes they took x,b</li>
<li>PCXXXSetYYY() and -pc_xxx_yyyy are now changed to PCFactorSetYYY() and -pc_factor_yyyy for XXX LU, ILU, Cholesky, and ICC</li>
</ul>
<h4>KSP:</h4>
<ul>
<li>-ksp_view, -ksp_monitor now take an optional filename argument</li>
<li>Added PetscLLAddPerm() to symbolic LU factorization</li>
</ul>
<h4>config/configure.py:</h4>
<ul>
<li>Changed --with-64-bit-ints to --with-64-bit-indices</li>
<li>
config/configure.py now supports the arguments
--with-precision=longdouble and --with-precision=int, these currently
have limited functionality and certain things like binary IO does not
work.
</li>
<li>
Option --LIBS=<extra libs> for some broken compilers that
require that require extra system libraries to be linked with
</li>
<li>
Changed --with-fortran-kernels=<0,1> option to
--with-fortran-kernels=<none,generic,bgl>
</li>
<li>Support --with-large-file-io=<bool> which indicates using files larger than 2GB</li>
<li>
--with-f90-header, --with-f90-source options merged into a single
option - for eg: --with-f90-interface=intel8
</li>
<li>
Added --with-is-color-value-type=<char,short>: char gives max
of 256 colors, short gives max of 65536 colors
</li>
<li>
Configure always tries to build libraries with PIC [or equivalent
flag] To disable this, use: --with-pic=0
</li>
<li>
Added --with-c-language-support for comiling PETSc with 'c' linkage
- but with a c++ compiler.
</li>
<li>
---download-mpich option now defaults to pm=gforker. To use mpd - use
the additional option --download-mpich-pm=mpd
</li>
<li>
--with-timer option is added [if the user knows MPI_Wtime() is
accurate/low-overhead on a machine - then use: --with-timer=mpi]
</li>
</ul>
<h4>SNES:</h4>
<ul>
<li>-snes-view, -snes_monitor now take an optional filename argument</li>
</ul>
<h4>TS:</h4>
<ul>
<li>-ts_view, -ts_monitor now take an optional filename argument</li>
</ul>
<h4>DA:</h4>
<h4>DMMG:</h4>
<ul>
<li>
Arguments to DMMGSetKSP() changed. Now the callback which forms the
linear system matrix can optionally fill also an alternate matrix for
the preconditioner.
</li>
</ul>
<h4>SYS:</h4>
<ul>
<li>PetscViewerFileType changed to PetscFileMode</li>
<li>PetscViewerSetFileType() changed to PetscViewerFileSetMode()</li>
</ul>
<h4>Fortran:</h4>
<ul>
<li>
remove the special libpetscfortran.a [fortran interface &
c interface now go into the same library]
</li>
<li>
With some f90 compilers - PETSc datatypes [like PetscScalar,PetscInt]
will use f90 KIND declaration - so if this code is in fixed form
- there could be errors with lines exceeding 72 char limit
</li>
</ul>
<h4><a href="http://www.mcs.anl.gov/petsc/miscellaneous/external.html">ExternalPackages</a>:</h4>
<ul>
<li>PLAPACK support added</li>
<li>BLOPEX support added</li>
<li>Updated Pvode interface to the newer Sundials package [configure option --download-sundials=1</li>
<li>Added --download-mpe=1</li>
<li>fblaslapack now has complete blas - as required by some external packages</li>
</ul>
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