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92 lines
4.0 KiB
HTML
92 lines
4.0 KiB
HTML
4 years ago
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<html lang="en">
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<head>
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<title>Subroutines - GNU gprof</title>
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<meta http-equiv="Content-Type" content="text/html">
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<meta name="description" content="GNU gprof">
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<meta name="generator" content="makeinfo 4.13">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="Call-Graph.html#Call-Graph" title="Call Graph">
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<link rel="prev" href="Callers.html#Callers" title="Callers">
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<link rel="next" href="Cycles.html#Cycles" title="Cycles">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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This file documents the gprof profiler of the GNU system.
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Copyright (C) 1988-2015 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, with no Front-Cover Texts, and with no
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Back-Cover Texts. A copy of the license is included in the
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section entitled ``GNU Free Documentation License''.
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-->
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<meta http-equiv="Content-Style-Type" content="text/css">
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<style type="text/css"><!--
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pre.display { font-family:inherit }
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pre.format { font-family:inherit }
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pre.smalldisplay { font-family:inherit; font-size:smaller }
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pre.smallformat { font-family:inherit; font-size:smaller }
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pre.smallexample { font-size:smaller }
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pre.smalllisp { font-size:smaller }
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span.sc { font-variant:small-caps }
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span.roman { font-family:serif; font-weight:normal; }
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span.sansserif { font-family:sans-serif; font-weight:normal; }
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--></style>
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</head>
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<body>
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<div class="node">
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<a name="Subroutines"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Cycles.html#Cycles">Cycles</a>,
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Previous: <a rel="previous" accesskey="p" href="Callers.html#Callers">Callers</a>,
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Up: <a rel="up" accesskey="u" href="Call-Graph.html#Call-Graph">Call Graph</a>
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<hr>
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</div>
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<h4 class="subsection">5.2.3 Lines for a Function's Subroutines</h4>
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<p>A function's entry has a line for each of its subroutines—in other
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words, a line for each other function that it called. These lines'
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fields correspond to the fields of the primary line, but their meanings
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are different because of the difference in context.
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<p>For reference, we repeat two lines from the entry for the function
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<code>main</code>, the primary line and a line for a subroutine, together
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with the heading line that shows the names of the fields:
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<pre class="smallexample"> index % time self children called name
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...
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[2] 100.0 0.00 0.05 1 main [2]
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0.00 0.05 1/1 report [3]
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</pre>
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<p>Here are the meanings of the fields in the subroutine-line for <code>main</code>
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calling <code>report</code>:
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<dl>
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<dt><code>self</code><dd>An estimate of the amount of time spent directly within <code>report</code>
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when <code>report</code> was called from <code>main</code>.
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<br><dt><code>children</code><dd>An estimate of the amount of time spent in subroutines of <code>report</code>
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when <code>report</code> was called from <code>main</code>.
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<p>The sum of the <code>self</code> and <code>children</code> fields is an estimate
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of the total time spent in calls to <code>report</code> from <code>main</code>.
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<br><dt><code>called</code><dd>Two numbers, the number of calls to <code>report</code> from <code>main</code>
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followed by the total number of non-recursive calls to <code>report</code>.
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This ratio is used to determine how much of <code>report</code>'s <code>self</code>
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and <code>children</code> time gets credited to <code>main</code>.
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See <a href="Assumptions.html#Assumptions">Estimating <code>children</code> Times</a>.
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<br><dt><code>name</code><dd>The name of the subroutine of <code>main</code> to which this line applies,
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followed by the subroutine's index number.
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<p>If the caller is part of a recursion cycle, the cycle number is
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printed between the name and the index number.
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</dl>
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</body></html>
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