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