I would like to use oprofile to measure P4 FSB activity. The P4 architecture does support counters for that. The FSB_DATA_ACTIVITY event is listed in /usr/local/share/oprofile/i386/p4/events. It is simple to measure and doesn’t require any tagging. Is it possible to use oprofile to measure FSB events? If so, is there additional configuration that is needed. I am using a recent version of oprofile checked out from CVS and kernel.org kernel version 2.6.14. Thanks.