User guide

Nios II IDE Help System

Views

Call Hierarchy View (Profiling Perspective)

This view automatically displays as part of the Profiling perspective. You can also open this

view from the Window menu by pointing to Show View, clicking Other..., expanding

Profiling, and double-clicking Call Hierarchy.

The Call Hierarchy view displays the time spent in each function, based on the standard

gmon.out data, in an easy-to-read tree format. This view also calculates and displays the

percentage of time spent in each function. In this view you can follow the function call

sequences much more easily than reading the gprof output.

There are two ways to view the call hierarchy data.

Top Down—call direction lists the calling functions, with the functions they called

nested below. The first entry in the Call Hierarchy view is spontaneous. This is a term

gprof uses when it cannot determine what the calling function is. There are two sets of

actual time and percentage time figures for each function. The first set represents the

time spent within the function. The second set represents the total time spent within

the function plus all functions called by that function. Each indented line in the view

drills down into the details of time and percentage spent in each called function. In the

top-down mode, when cycles of recursion exist in your code, a --> symbol appears to

the left of the function name indicating that the called function cycles.

Inverted—call direction lists the called functions, with the functions that called them

nested below. The first entry in the Call Hierarchy view is inverted calls. Actual time

and percentage time figures for each function represent time spent within the

function.

Inverted call direction lists the called functions, with the functions that called them nested

below.

The first entry in the Call Hierarchy view is inverted calls. Actual time and percentage

time figures for each function represent time spent within the function.

To reverse call direction display, right-click in the Call Hierarchy view, and click Toggle Call

Direction.

Note: You can load the source code for functions displayed in this view into the Editor

view. To do this, right-click the file name, and then click Show Source.