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Table 1 All attributes of a CPU event

From: Metis: a profiling toolkit based on the virtualization of hardware performance counters

Event

The event type e.g. CPU_CLK_UNHALTED

unit mask

The sub-events to count

counter

The hardware counter(s) that can count this event

Count

The reset value (how many events before an interrupt)

Kernel

Whether the counter should increment when in kernel space

User

Whether the counter should increment when in user space