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

[Tobias Schaffner <tobias.schaffner@siemens.com>]

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@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
>