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<TITLE>PetscLogTraceBegin</TITLE>
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<A NAME="PetscLogTraceBegin"><H1>PetscLogTraceBegin</H1></A>
Activates trace logging. Every time a PETSc event begins or ends, the event name is printed.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petsc.h"
int PetscLogTraceBegin(FILE *file)
</PRE>
Collective on PETSC_COMM_WORLD
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<DT><B>file </B> -The file to print trace in (e.g. stdout)
<br>
<P>
<H3><FONT COLOR="#CC3333">Options Database Key</FONT></H3>
<DT><B>-log_trace [filename] </B> -Activates <A HREF="../Profiling/PetscLogTraceBegin.html#PetscLogTraceBegin">PetscLogTraceBegin</A>()
<br>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
<A HREF="../Profiling/PetscLogTraceBegin.html#PetscLogTraceBegin">PetscLogTraceBegin</A>() prints the processor number, the execution time (sec),
then "Event begin:" or "Event end:" followed by the event name.
<P>
<A HREF="../Profiling/PetscLogTraceBegin.html#PetscLogTraceBegin">PetscLogTraceBegin</A>() allows tracing of all PETSc calls, which is useful
to determine where a program is hanging without running in the
debugger. Can be used in conjunction with the -log_info option.
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Profiling/PetscLogDump.html#PetscLogDump">PetscLogDump</A>(), <A HREF="../Profiling/PetscLogAllBegin.html#PetscLogAllBegin">PetscLogAllBegin</A>(), <A HREF="../Profiling/PetscLogPrintSummary.html#PetscLogPrintSummary">PetscLogPrintSummary</A>(), <A HREF="../Profiling/PetscLogBegin.html#PetscLogBegin">PetscLogBegin</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/sys/src/plog/plog.c.html#PetscLogTraceBegin">src/sys/src/plog/plog.c</A>
<BR><A HREF="./index.html">Index of all Profiling routines</A>
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