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<A NAME="PetscGetTime"><H1>PetscGetTime</H1></A>
Returns the current time of day in seconds. This returns wall-clock time.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
PetscErrorCode PetscGetTime(PetscLogDouble *t)
</PRE>
Not Collective
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>v </B> -time counter
<br>
<P>
<H3><FONT COLOR="#CC3333">Usage</FONT></H3>
<PRE>
#include <petsctime.h>
PetscLogDouble v1,v2,elapsed_time;
ierr = <A HREF="../Sys/PetscGetTime.html#PetscGetTime">PetscGetTime</A>(&v1);<A HREF="../Sys/CHKERRQ.html#CHKERRQ">CHKERRQ</A>(ierr);
.... perform some calculation ...
ierr = <A HREF="../Sys/PetscGetTime.html#PetscGetTime">PetscGetTime</A>(&v2);<A HREF="../Sys/CHKERRQ.html#CHKERRQ">CHKERRQ</A>(ierr);
elapsed_time = v2 - v1;
</PRE>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Requires explicitly including "petsctime.h"
<P>
Since the PETSc libraries incorporate timing of phases and operations,
<A HREF="../Sys/PetscGetTime.html#PetscGetTime">PetscGetTime</A>() is intended only for timing of application codes.
The options database commands -log, -log_summary, and -log_all activate
PETSc library timing.
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Profiling/PetscLogEventRegister.html#PetscLogEventRegister">PetscLogEventRegister</A>(), <A HREF="../Profiling/PetscLogEventBegin.html#PetscLogEventBegin">PetscLogEventBegin</A>(), <A HREF="../Profiling/PetscLogEventEnd.html#PetscLogEventEnd">PetscLogEventEnd</A>(), <A HREF="../Profiling/PetscLogStagePush.html#PetscLogStagePush">PetscLogStagePush</A>(),
<BR><A HREF="../Profiling/PetscLogStagePop.html#PetscLogStagePop">PetscLogStagePop</A>(), <A HREF="../Profiling/PetscLogStageRegister.html#PetscLogStageRegister">PetscLogStageRegister</A>(), <A HREF="../Profiling/PetscGetFlops.html#PetscGetFlops">PetscGetFlops</A>()
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
get, time
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/sys/time/ptime.c.html#PetscGetTime">src/sys/time/ptime.c</A>
<BR><A HREF="./index.html">Index of all Sys 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/ksp/ksp/examples/tutorials/ex10.c.html">src/ksp/ksp/examples/tutorials/ex10.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex42.c.html">src/ksp/ksp/examples/tutorials/ex42.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex27.c.html">src/snes/examples/tutorials/ex27.c.html</A><BR>
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