On Mon, Nov 16, 2020 at 08:36:36AM -0800, Dave Hansen wrote: > On 11/16/20 8:32 AM, Matthew Wilcox wrote: > >> > >> That's really the best we can do from software without digging into > >> microarchitecture-specific events. > > I mean this is perf. Digging into microarch specific events is what it > > does ;-) > > Yeah, totally. Sure, but the automatic promotion/demotion of TLB sizes is not visible if you don't know what you startd out with. > But, if we see a bunch of 4k TLB hit events, it's still handy to know > that those 4k TLB hits originated from a 2M page table entry. This > series just makes sure that perf has the data about the page table > mapping sizes regardless of what the microarchitecture does with it. This.
