Sysprof

            
            System-wide Linux profiler

Sysprof is a sampling CPU profiler that uses a ptrace in Linux kernel toprofile the entire system, not just a single application. Sysprof handlesshared libraries and applications do not need to be recompiled. In fact they don't even have to be restarted.

It has the following features:

 - profiles all running processes, not just a single application
 - has a simple graphical interface
 - shows the time spent in each branch of the call tree
 - profiles can be loaded and saved