OProfile – statistical profiler

OProfile is a low-overhead, transparent system-wide profiler for Linux, capable of instruction-grain profiling of all processes, shared libraries, the kernel and device drivers, via the hardware performance counters.

It consists of a kernel driver and a daemon for collecting sample data, and several post-profiling tools for turning data into information.

OProfile leverages the hardware performance counters of the CPU to enable profiling of a wide variety of interesting statistics, which can also be used for basic time-spent profiling. All code is profiled: hardware and software interrupt handlers, kernel modules, the kernel, shared libraries, and applications.

Features include:

  • System-wide profiling.
  • Performance counter support.
  • Call-graph support.
  • Low overhead.
  • Post-profile analysis.
  • System support.
  • Support for dynamically compiled (JIT) code.
  • operf program that allows non-root users to profile a specified individual process.

Website: oprofile.sourceforge.net
Support: Documentation
Developer: John Levon, Philippe Elie, Maynard Johnson
License: GNU GPL v2

OProfile is written in C and C++. Learn C with our recommended free books and free tutorials. Learn C++ with our recommended free books and free tutorials.

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