I have tried to profile xapian, according to the Wiki: http://trac.xapian.org/wiki/ProfilingXapian, we can profiling I/O bound cases with oprofile, but from many other articles, it seems that we can not do it in oprofile.

I have followed that wiki page, installed oprofile and libc6-dbg, but it doesn't work, only CPU bound functions are counted.

Anyone know how to count I/O cost in oprofile? Many thanks!

Best Regards!