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

On 8/27/26 10:22, Gabriele Monaco wrote:

On Thu, 2026-08-27 at 09:23 +0200, Tobias Schaffner wrote:

quoted

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@siemens.com>
---
  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@vger.kernel.org
  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