On Thu, 29 Jun 2017, Andy Lutomirski wrote: > ping-pong between two mms on the same CPU using eventfd: > patched: 1.22µs > patched, nopcid: 1.33µs > unpatched: 1.34µs > > Same ping-pong, but now touch 512 pages (all zero-page to minimize > cache misses) each iteration. dTLB misses are measured by > dtlb_load_misses.miss_causes_a_walk: > patched: 1.8µs 11M dTLB misses > patched, nopcid: 6.2µs, 207M dTLB misses > unpatched: 6.1µs, 190M dTLB misses > > Reviewed-by: Nadav Amit <nadav.amit@xxxxxxxxx> > Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx> Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
