System information

Perfmon2—Hardware-Based Performance Monitoring 101
File Description
is called (used for timeout-based set
switching)
handle_work_count Number of times
pfm_handle_work() routine is
called
ovl_intr_all_count Number of PMU interrupts received
by the kernel
ovfl_intr_nmi_count Number of non maskeable interrupts
(NMI) received by the kernel from
perfmon (only for X86 hardware)
ovfl_intr_ns Number of nanoseconds spent in the
perfmon2 PMU interrupt handler rou-
tine.
Average time to handle one PMU
interrupt =
ovfl_intr_ns /
ovfl_intr_all_count
ovfl_intr_regular_count Number of PMU interrupts which are
actually processed by the perfmon in-
terrupt handler
ovfl_intr_replay_count Number of PMU interrupts which
were replayed on the context switch
in or on event set switching
perfom_intr_spurious_count,
ovfl_intr_spurious_count
Number of PMU interrupts which
were dropped because there was no
active context
pfm_restart_count Number of times pfm_restart()
is called