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<HR><H2><A NAME="Node18">Log and tracefile tools</a></H2>
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<P>
  
The Windows distribution of <TT>mpich</TT> comes with the MPE library for profiling applications  
and the Jumpshot java tool for visualizing the generated log files.  
<P> 
<menu> 
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<HR><H3><A NAME="Node19">Logging C applications</a></H3>
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<P>
The MPE library is used for logging information   
about the execution of each MPI call to a log file for later analysis.    
This library may be accessed when linking the program.    
For example, to create a log file of a program such as <tt>cpi</tt>, all that needs   
to be done is to insert the mpe library in the link statement before the mpich library:   
<em>mpe.lib mpich.lib</em>  
<P> 
The log file will be written to a file with the name <em>cpi.exe.clog</em>  
or <em>cpi.exe.slog</em>, depending on the value of the environment variable  
<tt>MPE_LOG_FORMAT</tt> (clog is the default).  A clog file can be converted  
to the slog format using the <em>clog2slog.exe</em> tool found in the   
<tt> MPICH<IMG WIDTH=5 HEIGHT=11 SRC="img35.xbm">
SDK<IMG WIDTH=5 HEIGHT=11 SRC="img36.xbm">
profiling</tt> directory.  Only small slog files  
can be created directly.  If the log file is going to be large, you must create  
a clog file and then convert it to an slog file.  SLOG files can be  
graphically displayed using the Jumpshot program, described in  
Section <a href="node18.htm#Node21">Jumpshot 
</a>.    
<P> 
Here is an example:  
<ol> 
 
1. Build cpi from the examples<IMG WIDTH=5 HEIGHT=11 SRC="img37.xbm">
nt directory selecting the PDebug target.    
This project has <em>mped.lib mpichd.lib</em> in the link command.   
 
<BR> 
2. mpirun -np 4 cpi.exe   
 
<BR> 
3. clog2slog cpi.exe.clog   
 
<BR> 
4. java -jar jumpshot3.jar   
 
<BR> 
5. File=<I>&gt;</I>Select Logfile, choose cpi.exe.slog   
</ol> 

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<HR><H3><A NAME="Node20">Logging Fortran applications</a></H3>
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<P>
The Fortran interface in the mpich dlls cannot be profiled.  In order to profile a Fortran  
application, the application must be re-linked with the static mpich libraries.  The static libraries   
can be built from the source distribution <em>mpich.nt.1.2.5.src.exe</em> using the <em>mpich.static.dsw</em> workspace  
in the mpich root directory, or downloaded from <tt>ftp.mcs.anl.gov</tt> in directory  
<em>pub/mpi/nt/binaries</em>.  The debug static libraries are:  
<em>mpichsd.lib</em>, <em>pmpichsd.lib</em> and <em>mpichfsd.lib</em>.  
The release static libraries are: <em>mpichs.lib</em>, <em>pmpichs.lib</em> and <em>mpichfs.lib</em>.  
You also need the <em>mpdutil.lib</em> and <em>crypt.lib</em> libraries from the mpd workspace that  
can be built or downloaded.  
<P> 
For debug targets, add <em>mpichfsd.lib mped.lib mpichsd.lib pmpichsd.lib mpdutil.lib crypt.lib</em>  
to the link command.  
<P> 
For release targets, add <em>mpichfs.lib mpe.lib mpichs.lib pmpichs.lib mpdutil.lib crypt.lib</em>  
to the link command.  
<P> 
After building with the static libraries, run the application and view the log file using the  
steps described in the previous section.  
<P> 

<P>
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<HR><H3><A NAME="Node21">Jumpshot</a></H3>
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<P>
  
<P> 
Jumpshot is a program for displaying logfiles produced using the MPE  
logging library.  Jumpshot is described in more detail in the  
<em> MPE Installation and User's manual</em> [<a href="node66.htm#-Bib2">2</a>].  Jumpshot  
is a Java program and requires a functioning Java environment.  
You can view an slog logfile such as <em>cpi.exe.slog</em> in the example above by using   
<em>jumpshot3.jar</em> found in the <tt> MPICH<IMG WIDTH=5 HEIGHT=11 SRC="img38.xbm">
Jumpshot</tt> directory.  
Shortcuts to the Jumpshot manual and jumpshot3.jar are found at:   
start-<I>&gt;</I>programs-<I>&gt;</I>MPICH-<I>&gt;</I>Jumpshot  
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