This patch makes the energy data available via procfs. The related files
are placed as sub-directory named 'energy' inside the
/proc/sys/kernel/sched_domain/cpuX/domainY/groupZ directory for those
cpu/domain/group tuples which have energy information.
The following example depicts the contents of
/proc/sys/kernel/sched_domain/cpu0/domain0/group[01] for a system which
has energy information attached to domain level 0.
├── cpu0
│ ├── domain0
│ │ ├── busy_factor
│ │ ├── busy_idx
│ │ ├── cache_nice_tries
│ │ ├── flags
│ │ ├── forkexec_idx
│ │ ├── group0
│ │ │ └── energy
│ │ │ ├── cap_states
│ │ │ ├── idle_states
│ │ │ ├── nr_cap_states
│ │ │ └── nr_idle_states
│ │ ├── group1
│ │ │ └── energy
│ │ │ ├── cap_states
│ │ │ ├── idle_states
│ │ │ ├── nr_cap_states
│ │ │ └── nr_idle_states
│ │ ├── idle_idx
│ │ ├── imbalance_pct
│ │ ├── max_interval
│ │ ├── max_newidle_lb_cost
│ │ ├── min_interval
│ │ ├── name
│ │ ├── newidle_idx
│ │ └── wake_idx
│ └── domain1
│ ├── busy_factor
│ ├── busy_idx
│ ├── cache_nice_tries
│ ├── flags
│ ├── forkexec_idx
│ ├── idle_idx
│ ├── imbalance_pct
│ ├── max_interval
│ ├── max_newidle_lb_cost
│ ├── min_interval
│ ├── name
│ ├── newidle_idx
│ └── wake_idx
The files 'nr_idle_states' and 'nr_cap_states' contain a scalar value
whereas 'idle_states' and 'cap_states' contain a vector of power
consumption at this idle state respectively (compute capacity, power
consumption) at this capacity state.
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
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