On Tue, Dec 09, 2025 at 08:50:57PM +0000, Colton Lewis wrote: > This series creates a new PMU scheme on ARM, a partitioned PMU that > allows reserving a subset of counters for more direct guest access, > significantly reducing overhead. More details, including performance > benchmarks, can be read in the v1 cover letter linked below. > > An overview of what this series accomplishes was presented at KVM > Forum 2025. Slides [1] and video [2] are linked below. > > The long duration between v4 and v5 is due to time spent on this > project being monopolized preparing this feature for internal > production. As a result, there are too many improvements to fully list > here, but I will cover the notable ones.
Thanks for reposting. I think there's still quite a bit of ground to cover on the KVM side of this, but I would definitely appreciate it if someone with more context on the perf side of things could chime in. Will, IIRC you had some thoughts around counter allocation, right? Best, Oliver
