Re: [LSF/MM/BPF TOPIC] Multi-sized THP performance benchmarks and analysis on ARM64

[Yang Shi <shy828301@gmail.com>]

On Tue, Apr 30, 2024 at 7:41 AM Michal Hocko <mhocko@suse.com> wrote:
>
> On Thu 04-04-24 21:33:57, David Hildenbrand wrote:
> > On 04.04.24 20:57, Christoph Lameter (Ampere) wrote:
> > > On Mon, 1 Apr 2024, Jonathan Cameron wrote:
> > >
> > > > Sounds like useful data, but is it a suitable topic for LSF-MM?
> > > > What open questions etc is it raising?
> > >
> > >
> > > mTHP is new functionality that will require additional work to support
> > > more use cases. It is also unclear at this point in what usecases mTHP is
> > > useful and where no benefit can so far be seen. Also the effect of
> > > coalescing multiple PTE entries into one TLB entry is new to MM
> > > (CONT_PTE).
> > >
> > > Ultimately it would be useful to have mTHP support also provide larger
> > > blocksize capabilities for filesystem etc etc. mTHP needs to mature and an
> > > analysis of the arguable a bit experimental state of affairs can help a
> > > lot in getting there.
> >
> > Right, something like that (open items, missed use cases, requirements,
> > ideas, etc,.) would be a better (good!) fit.
> >
> > Pure benchmark results, analysis and recommendations are great. But likely a
> > better fit for a (white) paper, blog post, less-discussion-focused
> > conference.
>
> Completely agreed! It would be really great if Yang Shi could open the
> topic with high level data and then we spent majority of the slot on the
> actual discussion.

I will try my best to minimize the time spent by explaining benchmark
data. It may take 10 - 15 minutes in ballpark estimation. Then the
remaining time can be spent in actual discussion.

>
> Thanks!
> --
> Michal Hocko
> SUSE Labs