Hi,
Why isn't the number of ITLB page walks equal to the number of ITLB misses?
The VTune 6.1 reference says this about ITLB page walks: "This event counts the number of requests for a page walk due to an ITLB miss."
If the discrepancy were minute, I wouldn't mention it, but I'm getting 10x more page walks than misses.
There also seems to be an inconsistency between the events DTLB Load Misses, DTLB Store Misses, and DTLB Load and Store Misses. From the description, the last of the three should be equal to the sum of the first two, but I'm getting 2x more missed loads than I am missed_loads + missed_stores.
Does someone know what could be causing these results? If not, which statistics are most important (i.e. ITLB misses or ITLB page walks, missed_loads or missed_stores + missed_loads)?
Thanks for any clarification.
Message Edited by StephS on 03-10-2005 09:54 AM
Message Edited by StephS on 03-10-2005 09:55 AM