HPjmeter 4.3 User's Guide

Interpreting Call Graph Data
In the trees that are based on the call graph, the nodes represent methods and the arcs represent
cumulative calls from the preceding node.
• For CPU and Clock trees, the numerical values represent the time used by the arc. That is, the
numerical values represent the inclusive time used by all invocations represented by the arc.
The numbers in parentheses indicate what percentage of the total inclusive time used by the
method was caused by the calls from the preceding node. By default, the arcs with numerical
values less than 50 are not shown.
• For a Call Count tree, the numerical values represent the number of calls made to the method
from the preceding node (the caller). The percentage numbers represent the ratio of calls from
the caller to the number of all calls to this method from all callers. It may be non-intuitive to
traverse this graph if you get used to the call graphs representing time. This is because below
a low number of calls—for example, 1—a very large number of further calls can be hidden.
In cases when there is more than one caller of a method, the number of other callers is also given.
Example of Node Color Display
It is best to explain the meaning of the numbers in a tree in an example. Here's a snippet from a
Call Graph Tree with times:
Figure 16 Multiple Nodes Exposed in Call Graph Tree Display Showing Visitation Color Coding
In the picture above, you can see that run was the only caller of sleepPerTab. The inclusive
time for all calls to sleepPerTab was 6,883,833 time units. Lower down, you can see that
sleepPerTab used 2,966 time units on calls to setValue , which represents 97% of the total
inclusive time used by this method. The remaining 3% of time used by setValue was caused by
calls from the remaining callers (three other callers in this case).
90 Profiling Applications