On Thu, Aug 7, 2025 at 11:32 PM Menglong Dong <menglong8.dong@xxxxxxxxx> wrote:
>
> On Fri, Aug 8, 2025 at 8:58 AM Alexei Starovoitov
> <alexei.starovoitov@xxxxxxxxx> wrote:
> >
> [......]
> > > +{
> > > + DEFINE(RQ_nr_pinned, offsetof(struct rq, nr_pinned));
> >
> > This part looks nice and sweet. Not sure what you were concerned about.
> >
> > Respin it as a proper patch targeting tip tree.
> >
> > And explain the motivation in commit log with detailed
> > 'perf report' before/after along with 111M/s to 121M/s speed up,
> >
> > I suspect with my other __set_cpus_allowed_ptr() suggestion
> > the speed up should be even bigger.
>
> Much better.
>
> Before:
> fentry : 113.030 ± 0.149M/s
> fentry : 112.501 ± 0.187M/s
> fentry : 112.828 ± 0.267M/s
> fentry : 115.287 ± 0.241M/s
>
> After:
> fentry : 143.644 ± 0.670M/s
> fentry : 149.764 ± 0.362M/s
> fentry : 149.642 ± 0.156M/s
> fentry : 145.263 ± 0.221M/s
> fentry : 145.558 ± 0.145M/s
Nice!
