Profiling an Application

The QNX Application Profiler perspective lets you examine the overall performance of programs, no matter how large or complex, without following the source one line at a time. Where a debugger helps you find errors in your code, the QNX Application Profiler helps you pinpoint inefficient areas of your code that could run more efficiently.

By default, the Application Profiler perspective includes these main views:

• Profiler Sessions view
• Annotated source editor
• Debug view
• Properties view
• Execution Time view

• Types of profiling
  
• Statistical sample profiling (sampling)
  
• Function Instrumentation profiling
  
• Sampling and Call Count instrumentation profiling
  
• Postmortem profiling for Call Count and Function Instrumentation profiling
  
• Profiling your programs
  
• Building a program for profiling
  
• Building with profiling enabled
  
• Running and profiling a process
  
• Profiling a running process
  
• Postmortem profiling for Call Count and sampling
  
• Application Profiler tab
  
• Controlling your profiling sessions
  
• Understanding your profiling data
  
• Profiler Sessions view
  
• Toolbar options
  
• Pausing and resuming a profiling session
  
• Taking a snapshot of a profile session
  
• Creating a sample profile session
  
• Exporting a profiler session
  
• Debug view
  
• Execution Time view
  
• Column descriptions
  
• Interpreting Tree mode column information by profiling type
  
• Toolbar options
  
• Context menu navigation options
  
• Take Snapshot and Watch Difference
  
• Show Threads Tree
  
• Show Table mode
  
• Show Calls
  
• Show Reverse Calls
  
• Show Call Graphs
  
• Show Source
  
• Duplicating the view
  
• Viewing history
  
• Grouping
  
• Setting preferences
  
• Copying to the clipboard
  
• Filtering
  
• Searching
  
• Annotated source editor
  
• Using the Application Profiler
  
• Using Function Instrumentation with the Application Profiler
  
• Using Sampling and Call Count instrumentation mode
  
• Using Function Instrumentation mode for a single application
  
• Using Function Instrumentation in the System Profiler
  
• Creating an Application Profiler session
  
• Creating a profiler session by importing profiler data
  
• Profiling a single-threaded application
  
• Profiling a running process for an existing project
  
• Using postmortem profiling for Call Count and Sampling
  
• Postmortem profiling
  
• Running an instrumented binary with profiling from a command prompt (Function Instrumentation mode)
  
• Taking a snapshot of a profiling session
  
• Comparing profiles
  

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