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<center>
<h3>Running gprof and gcov</h3>
</center>
gprof and gcov support in UML is present in <a href="http://sourceforge.net/cvs/?group_id=429">CVS</a> as of
17 Apr 2001. I sent it to Alan for inclusion in
the ac tree, and it will be in my 2.4.4 release.
<a name="gprof"/><table width="100%" bgcolor="#e0e0e0">
<tr>
<td>
<b>
<font color="black">gprof</font>
</b>
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</table>
<blockquote head="gprof">
To use gprof with UML, you do the following
<ul>
<li>
Configure with gprof support - this is "enable gprof support" under "Kernel
Hacking". You'll need to turn on "kernel debugging symbols" first.
</li>
<li>
Build UML.
</li>
<li>
Boot it up and run your tests in it.
</li>
<li>
Halt it, and the standard gmon.out file will be written out. Run gprof as
you would with any other process
<blockquote>
<tt>
<font color="#000000" where="host">host% gprof linux</font>
</tt>
</blockquote>
and you will get the standard reams of gprof output.
</li>
</ul>
<a href="text/gprof1.out">Here</a> is gprof output from
several hours of a thrashing UML. There is some commentary on it in
<a href="diary.html#10-03-2001">this entry</a> of
the UML <a href="diary.html">diary</a>.
</blockquote>
<a name="gcov"/><table width="100%" bgcolor="#e0e0e0">
<tr>
<td>
<b>
<font color="black">gcov</font>
</b>
</td>
</tr>
</table>
<blockquote head="gcov">
Using gcov with UML is similar:
<ul>
<li>
Configure with gprof support - this is "enable gcov support" under "Kernel
Hacking". You'll need to turn on "kernel debugging symbols" first.
</li>
<li>
Build UML.
</li>
<li>
Boot it up and run your tests in it.
</li>
<li>
Halt UML, and every file in the kernel that has coverage data will get a
'file.da' file. In order to see what coverage of a particular file you
achieved with your tests, run
<blockquote>
<tt>
<font color="#000000" where="host">host% gcov file.c</font>
</tt>
</blockquote>
This will produce 'file.c.gcov', which is 'file.c' annotated with line-by-line
coverage information.
</li>
</ul>
</blockquote>
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<font size="-1">Hosted at </font>
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