Top-down Callstack view can be used to explore the call-sequence flow of the application to analyze the time spent in functions and its callees.
Click to view it as follows
Figure 1. Top-down Callstack
Functions are displayed based on the parent to child entries depending on the inclusive samples values sorted.
Inclusive sample values for a function and its descendants.
Enabling Hide C++ std Library Calls option works only when C++ library calls are made. It will exclude such calls from the list and display the other child entries.
Context menu of collapse entries will close all the expanded entries. Expand entries will expand the child entries and the Open Source View option will display the corresponding source view.