- System-wide Performance Profiler for Linux - Sysprof

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

Sysprof 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

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source:http://linuxpoison.blogspot.com/2010/11/135781677513807.html