The primary line 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.
For reference, we repeat the primary line from the entry for function
report in our main example, together with the heading line that
shows the names of the fields:
index % time self children called name ...  100.0 0.00 0.05 1 report 
Here is what the fields in the primary line mean:
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.
The time spent in this function is counted again for the callers of
this function. Therefore, adding up these percentages is meaningless.
secondsfield for this function in the flat profile.
childrenentries of the children listed directly below this function.
If the function called itself recursively, there are two numbers, separated by a ‘+’. The first number counts non-recursive calls, and the second counts recursive calls.
In the example above, the function
report was called once from
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 How Mutually Recursive Functions Are Described).
For example, if function
gnurr is part of
cycle number one, and has index number twelve, its primary line would
be end like this:
gnurr <cycle 1>