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.
