Profiling (Wikipedia article) is a tool for tracing where CPU time is spent. This is usually done for performance analysis reasons.

• ?gprof

  Should be working, but some issues have been reported, regarding GCC spec files. Should be possible to fix (if not yet done) easily.

• glibc's sotruss

• ltrace

• latrace

• dtrace

  Have a look at this, integrate it into the main trees.

• LTTng

• SystemTap

• ... or some other Linux thing.