1. Is there an event for Intel Xeon/Pentium 4 processors for counting all the Floating Point Instructions executed (or all the Integer Instructions)? 2. Why can't I see the 'x87 and SIMD Register and Memory Moves Retired' event in the list of the supported CPU events (for Intel Xeon CPU)? 3. Is there a way I can change/set the Event Mask Bits for the events when using Event Based Sampling? And finally: 4.Can I measure other events within VTune apart from the ones that seem to be supported by Vtune and among the Performance Monitoring events that appear in the processor manual?