Prism User's Guide - CSAIL People - MIT

Chapter 6. Obtaining Performance Data 111
Chaptr 6. btainng Peformace Daa 11
Resource: Node cpu (system)
MAIN I 150.1 x
loop 1 150.0 X
results
Figure 34. A call-graph display.
In call-graph mode, you see which procedures call which other procedures, and
the use of the selected resource or subsystem for each individual call. This gives
a more detailed picture of the program's behavior. Figure 34 shows the callgraph
display for the data shown in the Procedures pane in Figure 33. Note in
Figure 34 that the time allocated to the MAIN routine includes the time spent in
loop, which it calls.
To navigate down through the call graph, click anywhere on the line that lists a
procedure (other than the procedure at the top); the display changes to show this
procedure at the top, with the procedures it calls below it. Thus, in call-graph
mode, the Procedures pane at any one time shows two levels of the call graph.
To move up through the call graph, click on the top procedure in the display; the
display changes to show the caller of this procedure at the top, with the procedures
it calls beneath it.
As with the Resources pane, you can use the Sort By selection from the Options
menu to arrange the procedures in the Procedures pane.
· Choose Time (the default) to list procedures according to their use of the
resource or subsystem, from most to least.
* Choose Name to arrange the procedures in alphabetical order.
In call-graph mode, the sorting applies only to the children of the calling procedure;
the calling procedure is always at the top of the display.
If a routine is not compiled with the -cmprof ile option, Prism will display data
only for serial-subsystem resources or for the not profiled parallel-subsystem
Version 1.2, March 1993
Copyright © 1993 Thinking Machines Corporation