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<A NAME="PCOPENMP"><H1>PCOPENMP</H1></A>
Runs a preconditioner for a single process matrix across several MPI processes
<pre>
This will usually be run with -pc_type openmp -ksp_type preonly
</pre>
<pre>
solver options are set with -openmp_ksp_... and -openmp_pc_... for example
</pre>
<pre>
-openmp_ksp_type cg would use cg as the Krylov method or -openmp_ksp_monitor or
</pre>
<pre>
-openmp_pc_type hypre -openmp_pc_hypre_type boomeramg
</pre>
<P>
Always run with -ksp_view (or -snes_view) to see what solver is actually being used.
<P>
Currently the solver options INSIDE the OpenMP preconditioner can ONLY be set via the
options database.
<P>
<P>
See <A HREF="../Sys/PetscOpenMPMerge.html#PetscOpenMPMerge">PetscOpenMPMerge</A>() and <A HREF="../Sys/PetscOpenMPSpawn.html#PetscOpenMPSpawn">PetscOpenMPSpawn</A>() for two ways to start up MPI for use with this preconditioner
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCCreate.html#PCCreate">PCCreate</A>(), <A HREF="../PC/PCSetType.html#PCSetType">PCSetType</A>(), <A HREF="../PC/PCType.html#PCType">PCType</A> (for list of available types)
<BR>
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ksp/pc/impls/openmp/openmp.c.html#PCOPENMP">src/ksp/pc/impls/openmp/openmp.c</A>
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