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<TITLE>PCASMSetTotalSubdomains</TITLE>
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<A NAME="PCASMSetTotalSubdomains"><H1>PCASMSetTotalSubdomains</H1></A>
Sets the subdomains for all processor for the additive Schwarz preconditioner. Either all or no processors in the <A HREF="../PC/PC.html#PC">PC</A> communicator must call this routine, with the same index sets.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscpc.h"
int PCASMSetTotalSubdomains(PC pc,int N,IS *is)
</PRE>
Collective on <A HREF="../PC/PC.html#PC">PC</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>pc </B></TD><TD>- the preconditioner context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>n </B></TD><TD>- the number of subdomains for all processors
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>is </B></TD><TD>- the index sets that define the subdomains for all processor
(or PETSC_NULL for PETSc to determine subdomains)
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Key</FONT></H3>
To set the total number of subdomain blocks rather than specify the
index sets, use the option
<DT><B>-pc_asm_blocks <blks> </B> -Sets total blocks
<br>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Currently you cannot use this to set the actual subdomains with the argument is.
<P>
By default the ASM preconditioner uses 1 block per processor.
<P>
These index sets cannot be destroyed until after completion of the
linear solves for which the ASM preconditioner is being used.
<P>
Use <A HREF="../PC/PCASMSetLocalSubdomains.html#PCASMSetLocalSubdomains">PCASMSetLocalSubdomains</A>() to set local subdomains.
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../PC/PC.html#PC">PC</A>, ASM, set, total, global, subdomains, additive Schwarz
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../PC/PCASMSetLocalSubdomains.html#PCASMSetLocalSubdomains">PCASMSetLocalSubdomains</A>(), <A HREF="../PC/PCASMSetOverlap.html#PCASMSetOverlap">PCASMSetOverlap</A>(), <A HREF="../PC/PCASMGetSubSLES.html#PCASMGetSubSLES">PCASMGetSubSLES</A>(),
<BR><A HREF="../PC/PCASMCreateSubdomains2D.html#PCASMCreateSubdomains2D">PCASMCreateSubdomains2D</A>()
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/sles/pc/impls/asm/asm.c.html#PCASMSetTotalSubdomains">src/sles/pc/impls/asm/asm.c</A>
<BR><A HREF="./index.html">Index of all PC routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/sles/examples/tutorials/ex8.c.html">src/sles/examples/tutorials/ex8.c.html</A><BR>
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