Design Elements: Oprofile Interface

The oprofile loadable kernel module provides the following capabilities

NMI-based sampling on P6 and Athlon processors

System call interception and trace of the following system calls
fork(and vfork, clone), exec, mmap, init_module, exit

mmapped file path hash table for retrieving path information of all mmapped files included in this trace

Code is in linux_module.c and linux_module.h.  File rec_proc.c contains the sequencing.