Re: [RFC 1/3] rv: add per-edge dwell-time statistics primitive

[Tobias Schaffner]

On 8/27/26 10:22, Gabriele Monaco wrote:
> On Thu, 2026-08-27 at 09:23 +0200, Tobias Schaffner wrote:
> > Add a small primitive that records, per automaton edge, how long the
> > monitor dwelled before taking it with a count, a sum and a maximum.
> >
> > The counters are per-CPU and lock-free, so a monitor's hot path can update
> > them without disabling interrupts and without perturbing the very latency
> > being measured.
> >
> > Signed-off-by: Tobias Schaffner <tobias.schaffner@xxxxxxxxxxx>
> > ---
> >   MAINTAINERS                  |  1 +
> >   include/linux/rv_edge_stat.h | 45 ++++++++++++++++++++++++++++++++++++
> >   2 files changed, 46 insertions(+)
> >   create mode 100644 include/linux/rv_edge_stat.h
> >
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index 8014b9f8253e..04589dda0873 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -23654,6 +23654,7 @@ L:	linux-trace-kernel@xxxxxxxxxxxxxxx
> >   S:	Maintained
> >   F:	Documentation/trace/rv/
> >   F:	include/linux/rv.h
> > +F:	include/linux/rv_edge_stat.h
> >   F:	include/rv/
>
> Any reason why you don't use include/rv/edge_stat.h ?

No good reason. You're right. Happy to move it in a V2.

Best,
Tobias

> You wouldn't need to touch the maintainers file and could just
>
>    #include <rv/edge_stat.h>
>
> Thanks,
> Gabriele