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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<head> <link rel="canonical" href="http://www.mcs.anl.gov/petsc/petsc-current/docs/changes/21.html" />
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<title>Documentation: Changes: 2.1.0</title>
</head>
<body bgcolor="#ffffff">
<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.7.5 v3.7.5 docs/changes/21.html "><small>Report Typos and Errors</small></a></div>
<h1>Documentation: Changes: 2.1.0</h1>
<style type="text/css">
h2 {
color: red;
}
h4 {
font-weight: bold;
text-decoration: underline;
}
</style>
<div id="main">
<div align="center">
<h2><a name="CHANGES">CHANGES</a> in PETSc 2.1.0 (see new <a href="#Features">features</a>)</h2>
</div>
<h4>General:</h4>
<ul>
<li>
Simpler interface for structured grids, see
src/snes/examples/tutorials/ex5.c
</li>
<li>
"System routines" including PLog..., Options..., Viewer...,
Draw...., FList...,OList... now all begin with the string Petsc. For
example, PetscOptionsGetInt() and PetscLogDefaultBegin().
</li>
<li>
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.
</li>
</ul>
<h4>AO (Application Orderings):</h4>
<h4>TS (Timestepping Solvers):</h4>
<h4>SNES (Nonlinear Solvers):</h4>
<h4>SLES (Linear Solvers):</h4>
<h4>KSP (Krylov Subspace Methods):</h4>
<h4>PC (Preconditioners):</h4>
<h4>MAT (Matrices):</h4>
<ul>
<li>
When using MatCreate(), you must follow with a MatSetType() or
MatSetFromOptions() before using the matrix.
</li>
<li>
Changed <code>int
MatShellSetOperation(Mat,MatOperation,void*);</code> to <code>int
MatShellSetOperation(Mat,MatOperation,void(*)());</code>
</li>
<li>
Changed <code>int
MatShellGetOperation(Mat,MatOperation,void**);</code> to <code>int
MatShellGetOperation(Mat,MatOperation,void(**)());</code>
</li>
<li>Changed IncompleteCholesky to ICC</li>
</ul>
<h4>DA (Distributed Arrays):</h4>
<ul>
<li>Changed the DAMG routines to DMMG routines.</li>
<li>
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.
</li>
</ul>
<h4>VEC (Vectors):</h4>
<ul>
<li>
Changed <code>int VecSetOperation(Vec,VecOperation,void*);</code> to
<code>int VecSetOperation(Vec,VecOperation,void(*)());</code>
</li>
</ul>
<h4>IS (Index Sets):</h4>
<h4>General:</h4>
<h4>Draw (Graphics):</h4>
<h4>Viewers:</h4>
<h4>System:</h4>
<h4>Error Handling:</h4>
<ul>
<li>
CHKERRA() is now obselete; use CHKERRQ() instead. Changed the calling
sequence of SETERRQ() to eliminate the second input parameter.
</li>
</ul>
<h4>Event Logging:</h4>
<h4>Fortran Interface:</h4>
<div align="center">
<h2>New <a name="Features">features</a> in PETSc 2.1.0 (see <a href="#CHANGES">changes</a> above)</h2>
</div>
<h4>General:</h4>
<ul>
<li>Simpler interface for structured grids, see src/snes/examples/tutorials/ex5.c</li>
<li>
Complete infrastructure for parallel multigrid for linear and
nonlinear problems on structured grids. See
src/snes/examples/tutorials/ex19.c
</li>
<li>Added manual pages for PETSc objects, enums etc.</li>
<li>
Added html version of all source code and examples, accessable from
docs/index.html and the manual pages.
</li>
</ul>
<h4>AO (Application Orderings):</h4>
<h4>TS (Timestepping Solvers):</h4>
<h4>SNES (Nonlinear Solvers):</h4>
<h4>SLES (Linear Solvers):</h4>
<h4>KSP (Krylov Subspace Methods):</h4>
<ul>
<li>
Added support for "diagonal scaling" of preconditioned
system as required by most ODE integrators via
PCDiagonalScaleSet().
</li>
</ul>
<h4>PC (Preconditioners):</h4>
<h4>MAT (Matrices):</h4>
<ul>
<li>
Added the Henry Tufo/Paul Fischer libtfs scalable parallel direct
solver for MPIAIJ matrices.
</li>
<li>Added routine MatFDColoringSetRecompute().</li>
</ul>
<h4>DA (Distributed Arrays):</h4>
<ul>
<li>
Added DAVecGetArray() to access the multidimensional arrays directly in
the global parallel indexing. See src/snes/examples/tutorials/ex5.c and
ex19.c
</li>
<li>
Add DAGetLocalVector()/DARestoreLocalVector() for inexpensive access
to local work vectors.
</li>
</ul>
<h4>VEC (Vectors):</h4>
<ul>
<li>Added DMComposite routines to help with PDE optimization and multicomponent PDEs.</li>
</ul>
<h4>IS (Index Sets):</h4>
<h4>PF:</h4>
<h4>Draw (Graphics):</h4>
<h4>Viewers:</h4>
<h4>System:</h4>
<h4>Error Handling:</h4>
<h4>Event Logging:</h4>
<h4>Fortran Interface:</h4>
</div>
</body>
</html>
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