This is the trace: http://www.enginetwork.com/tmp_ktrace.bz2 I am interesting to OCEAN program. This program has two thread and I want to calculate the time elapsed from syscall_entry and syscall_exit. For do this the entry MUST come before the exit. But thats not even true. Thanks a lot, -- Ing. Gian Lorenzo Meocci http://www.meocci.it