On Mon, Dec 25, 2023 at 7:42 AM Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote: > > On Sun, Dec 24, 2023 at 11:41:31PM -0700, Yu Zhao wrote: > > On Fri, Dec 22, 2023 at 3:24 AM Kairui Song <ryncsn@xxxxxxxxx> wrote: > > > > > > From: Kairui Song <kasong@xxxxxxxxxxx> > > > > > > Prefetch for inactive/active LRU have been long exiting, apply the same > > > optimization for MGLRU. > > > > I seriously doubt that prefetch helps in this case. > > > > Willy, any thoughts on this? Thanks. > > It _might_ ... highly depends on microarchitecture. My experience is > that it offers more benefit on AMD than on Intel, but that experience > is several generations out of date and it may just not be applicable to > modern AMD. > > It's probably more effective on ARM Cortex A cores than on ARM Cortex X > cores ... maybe we can get someone from Android (Suren?) to do some > testing? Android is quite noisy and I'm afraid a small improvement like this would not be distinguishable from noise unless it's much more pronounced. I'll take a stab but don't hold your breath.
