112 lines
4.5 KiB
HTML
112 lines
4.5 KiB
HTML
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<html lang="en">
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<head>
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<title>Primary - 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="next" href="Callers.html#Callers" title="Callers">
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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) 1988-2019 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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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="Primary"></a>
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<p>
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Next: <a rel="next" accesskey="n" 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">5.2.1 The Primary Line</h4>
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<p>The <dfn>primary line</dfn> in a call graph entry is the line that
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describes the function which the entry is about and gives the overall
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statistics for this function.
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<p>For reference, we repeat the primary line from the entry for function
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<code>report</code> in our main example, together with the heading line that
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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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[3] 100.0 0.00 0.05 1 report [3]
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</pre>
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<p>Here is what the fields in the primary line mean:
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<dl>
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<dt><code>index</code><dd>Entries are numbered with consecutive integers. Each function
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therefore has an index number, which appears at the beginning of its
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primary line.
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<p>Each cross-reference to a function, as a caller or subroutine of
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another, gives its index number as well as its name. The index number
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guides you if you wish to look for the entry for that function.
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<br><dt><code>% time</code><dd>This is the percentage of the total time that was spent in this
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function, including time spent in subroutines called from this
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function.
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<p>The time spent in this function is counted again for the callers of
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this function. Therefore, adding up these percentages is meaningless.
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<br><dt><code>self</code><dd>This is the total amount of time spent in this function. This
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should be identical to the number printed in the <code>seconds</code> field
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for this function in the flat profile.
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<br><dt><code>children</code><dd>This is the total amount of time spent in the subroutine calls made by
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this function. This should be equal to the sum of all the <code>self</code>
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and <code>children</code> entries of the children listed directly below this
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function.
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<br><dt><code>called</code><dd>This is the number of times the function was called.
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<p>If the function called itself recursively, there are two numbers,
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separated by a ‘<samp><span class="samp">+</span></samp>’. The first number counts non-recursive calls,
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and the second counts recursive calls.
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<p>In the example above, the function <code>report</code> was called once from
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<code>main</code>.
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<br><dt><code>name</code><dd>This is the name of the current function. The index number is
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repeated after it.
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<p>If the function is part of a cycle of recursion, the cycle number is
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printed between the function's name and the index number
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(see <a href="Cycles.html#Cycles">How Mutually Recursive Functions Are Described</a>).
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For example, if function <code>gnurr</code> is part of
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cycle number one, and has index number twelve, its primary line would
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be end like this:
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<pre class="example"> gnurr <cycle 1> [12]
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</pre>
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</dl>
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</body></html>
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