---

Time Profiling

The first and most frequently used Shark configuration is the Time Profile. This produces a statistical sampling of the program’s or system’s execution by recording a new sample every time that a timer interrupt occurs, at a user-specified frequency (1 KHz, for 1ms sampling intervals, by default). At each interrupt, Shark records a few key facts about the state of each processor for later analysis: the process and thread ID of the executing process, the program counter, and the callstack of the routine that was executing. From this sampled information, Shark reconstructs exactly what code from which functions was executing as samples were taken.

Contents:

Statistical Sampling
Taking a Time Profile
Profile Browser
Chart View
Code Browser
Tips and Tricks
Example: Optimizing MPEG-2 using Time Profiles

---