Re: [PATCH V3 02/16] perf: Fix the throttle logic for a group
From: Ingo Molnar
Date: Sat May 17 2025 - 04:23:06 EST
* kan.liang@xxxxxxxxxxxxxxx <kan.liang@xxxxxxxxxxxxxxx> wrote:
> The throttle only happens when an event is overflowed. Stop the entire
> group when any event in the group triggers the throttle.
> The MAX_INTERRUPTS is set to all throttle events.
Since this is a relatively long series with a healthy dose of
breakage-risk, I'm wondering about bisectability:
- patch #2 auto-throttles groups, ie. stops the PMU
- patches #3-#16 removes explicit PMU-stop calls.
In the interim commits, will the double PMU-stop in drivers not updated
yet do anything noticeable, such as generate warnings, etc?
Thanks,
Ingo