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<TITLE>DMLocalToGlobalBegin</TITLE>
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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</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-3.14.5 v3.14.5 docs/manualpages/DM/DMLocalToGlobalBegin.html "><small>Report Typos and Errors</small></a></div>
<A NAME="DMLocalToGlobalBegin"><H1>DMLocalToGlobalBegin</H1></A>
begins updating global vectors from local vectors
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdm.h"
#include "petscdmlabel.h"
#include "petscds.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../DM/DMLocalToGlobalBegin.html#DMLocalToGlobalBegin">DMLocalToGlobalBegin</A>(<A HREF="../DM/DM.html#DM">DM</A> dm,<A HREF="../Vec/Vec.html#Vec">Vec</A> l,<A HREF="../Sys/InsertMode.html#InsertMode">InsertMode</A> mode,<A HREF="../Vec/Vec.html#Vec">Vec</A> g)
</PRE>
Neighbor-wise Collective on dm
<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>dm </B></TD><TD>- the <A HREF="../DM/DM.html#DM">DM</A> object
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>l </B></TD><TD>- the local vector
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>mode </B></TD><TD>- if <A HREF="../Sys/INSERT_VALUES.html#INSERT_VALUES">INSERT_VALUES</A> then no parallel communication is used, if <A HREF="../Sys/ADD_VALUES.html#ADD_VALUES">ADD_VALUES</A> then all ghost points from the same base point accumulate into that base point.
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>g </B></TD><TD>- the global vector
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
In the <A HREF="../Sys/ADD_VALUES.html#ADD_VALUES">ADD_VALUES</A> case you normally would zero the receiving vector before beginning this operation.
<A HREF="../Sys/INSERT_VALUES.html#INSERT_VALUES">INSERT_VALUES</A> is not supported for <A HREF="../DMDA/DMDA.html#DMDA">DMDA</A>, in that case simply compute the values directly into a global vector instead of a local one.
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DM/DMLocalToGlobal.html#DMLocalToGlobal">DMLocalToGlobal</A>(), <A HREF="../DM/DMLocalToGlobalEnd.html#DMLocalToGlobalEnd">DMLocalToGlobalEnd</A>(), <A HREF="../DM/DMCoarsen.html#DMCoarsen">DMCoarsen</A>(), <A HREF="../DM/DMDestroy.html#DMDestroy">DMDestroy</A>(), <A HREF="../DM/DMView.html#DMView">DMView</A>(), <A HREF="../DM/DMCreateGlobalVector.html#DMCreateGlobalVector">DMCreateGlobalVector</A>(), <A HREF="../DM/DMCreateInterpolation.html#DMCreateInterpolation">DMCreateInterpolation</A>(), <A HREF="../DM/DMGlobalToLocal.html#DMGlobalToLocal">DMGlobalToLocal</A>(), <A HREF="../DM/DMGlobalToLocalEnd.html#DMGlobalToLocalEnd">DMGlobalToLocalEnd</A>(), <A HREF="../DM/DMGlobalToLocalBegin.html#DMGlobalToLocalBegin">DMGlobalToLocalBegin</A>()
<BR>
<P>
<P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>intermediate<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/dm/interface/dm.c.html#DMLocalToGlobalBegin">src/dm/interface/dm.c</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/dm/tutorials/ex1.c.html">src/dm/tutorials/ex1.c.html</A><BR>
<A HREF="../../../src/dm/tutorials/ex5.c.html">src/dm/tutorials/ex5.c.html</A><BR>
<A HREF="../../../src/dm/tutorials/ex7.c.html">src/dm/tutorials/ex7.c.html</A><BR>
<A HREF="../../../src/dm/tutorials/ex9.c.html">src/dm/tutorials/ex9.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/tutorials/ex42.c.html">src/ksp/ksp/tutorials/ex42.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/tutorials/ex43.c.html">src/ksp/ksp/tutorials/ex43.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/tutorials/ex49.c.html">src/ksp/ksp/tutorials/ex49.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/tutorials/ex69.c.html">src/ksp/ksp/tutorials/ex69.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/tutorials/ex70.c.html">src/ksp/ksp/tutorials/ex70.c.html</A><BR>
<A HREF="../../../src/snes/tutorials/ex5.c.html">src/snes/tutorials/ex5.c.html</A><BR>
<A HREF="../../../src/snes/tutorials/ex15.c.html">src/snes/tutorials/ex15.c.html</A><BR>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/dm/impls/composite/pack.c.html#DMLocalToGlobalBegin_Composite">DMLocalToGlobalBegin_Composite in src/dm/impls/composite/pack.c</A><BR>
<A HREF="../../../src/dm/impls/da/dagtol.c.html#DMLocalToGlobalBegin_DA">DMLocalToGlobalBegin_DA in src/dm/impls/da/dagtol.c</A><BR>
<A HREF="../../../src/dm/impls/moab/dmmbvec.cxx.html#DMLocalToGlobalBegin_Moab">DMLocalToGlobalBegin_Moab in src/dm/impls/moab/dmmbvec.cxx</A><BR>
<A HREF="../../../src/dm/impls/network/network.c.html#DMLocalToGlobalBegin_Network">DMLocalToGlobalBegin_Network in src/dm/impls/network/network.c</A><BR>
<A HREF="../../../src/dm/impls/redundant/dmredundant.c.html#DMLocalToGlobalBegin_Redundant">DMLocalToGlobalBegin_Redundant in src/dm/impls/redundant/dmredundant.c</A><BR>
<A HREF="../../../src/dm/impls/stag/stag.c.html#DMLocalToGlobalBegin_Stag">DMLocalToGlobalBegin_Stag in src/dm/impls/stag/stag.c</A><BR>
<BR><A HREF="./index.html">Index of all DM routines</A>
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