On Mon, Aug 17, 2020 at 07:31:39PM -0700, John Hubbard wrote: > > Real time (s) Max RSS (KiB) > > anon 2.237081 107088 > > memset 2.252241 112180 > > refpage 2.243786 107128 > > > > We can see that RSS for refpage is almost the same as anon, and real > > time overhead is 44% that of memset. > > > > Are some of the numbers stale, maybe? Try as I might, I cannot combine > anything above to come up with 44%. :) You're not trying hard enough ;-) (2.252241 - 2.237081) / 2.237081 = .00677668801442594166 (2.243786 - 2.237081) / 2.237081 = .00299720930981041812 .00299720930981041812 / .00677668801442594166 = .44228232189973614648 tadaa! As I said last time this was posted, I'm just not excited by this. We go from having a 0.68% time overhead down to an 0.30% overhead, which just doesn't move the needle for me. Maybe there's a better benchmark than this to show benefits from this patchset.
