Re: [PATCH kvm/queue v2 2/3] perf: x86/core: Add interface to query perfmon_event_map[] directly

[Like Xu]

On 10/2/2022 11:34 pm, Liang, Kan wrote:
> For the current perf subsystem, a PMU should be shared among different users via 
> the multiplexing mechanism if the resource is limited. No one has full control 
> of a PMU for lifetime. A user can only have the PMU in its given period.

Off-topic, does perf has knobs to disable the default multiplexing mechanism
for individual tasks and enforce a first-come, first-served policy for same 
priority ?

The reported perf data from the multiplexing mechanism may even mislead
the conclusions of subsequent statistically based performance analysis.