Re: [PATCH 1/3] perf/core: Update perf_adjust_freq_unthr_context()

[Namhyung Kim]

Hi Mingwei,

On Mon, Nov 20, 2023 at 3:24 PM Mingwei Zhang <mizhang@xxxxxxxxxx> wrote:
>
> On Mon, Nov 20, 2023, Ian Rogers wrote:
> > On Mon, Nov 20, 2023 at 2:19 PM Namhyung Kim <namhyung@xxxxxxxxxx> wrote:
> > >
> > > It was unnecessarily disabling and enabling PMUs for each event.  It
> > > should be done at PMU level.  Add pmu_ctx->nr_freq counter to check it
> > > at each PMU.  As pmu context has separate active lists for pinned group
> > > and flexible group, factor out a new function to do the job.
> > >
> > > Another minor optimization is that it can skip PMUs w/ CAP_NO_INTERRUPT
> > > even if it needs to unthrottle sampling events.
> > >
> > > Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
> >
> > Series:
> > Reviewed-by: Ian Rogers <irogers@xxxxxxxxxx>
> >
> > Thanks,
> > Ian
> >
>
> Can we have "Cc: stable@xxxxxxxxxxxxxxx" for the whole series? This
> series should have a great performance improvement for all VMs in which
> perf sampling events without specifying period.

I was not sure if it's ok to have this performance fix in the stable series.

Thanks,
Namhyung