June 2017
Intermediate to advanced
478 pages
13h 14m
English
Content preview from Mastering Embedded Linux Programming - Second Edition
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Other profilers – OProfile and gprof
OProfile and gprof are two statistical profilers that predate perf. They are both offer subsets of the functionality of perf, but they are still quite popular. I will mention them only briefly.
OProfile is a kernel profiler that started out in 2002. Originally, it had its own kernel sampling code, but recent versions use the perf_events infrastructure for that purpose. There is more information about it at http://oprofile.sourceforge.net. OProfile consists of a kernel-space component and a user space daemon and analysis commands.
OProfile needs these two kernel options to be enabled:
- CONFIG_PROFILING in General setup | Profiling support
- CONFIG_OPROFILE in General setup | OProfile system profiling
If ...
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