node_exporter/collector/cpu_openbsd_amd64.go

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// Copyright 2020 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build !nocpu
// +build !nocpu
package collector
import (
"strconv"
"unsafe"
"github.com/go-kit/log"
"github.com/prometheus/client_golang/prometheus"
"golang.org/x/sys/unix"
)
type clockinfo struct {
hz int32
tick int32
tickadj int32
stathz int32
profhz int32
}
const (
CP_USER = iota
CP_NICE
CP_SYS
CP_SPIN
CP_INTR
CP_IDLE
CPUSTATES
)
type cpuCollector struct {
cpu typedDesc
logger log.Logger
}
func init() {
registerCollector("cpu", defaultEnabled, NewCPUCollector)
}
func NewCPUCollector(logger log.Logger) (Collector, error) {
return &cpuCollector{
cpu: typedDesc{nodeCPUSecondsDesc, prometheus.CounterValue},
logger: logger,
}, nil
}
func (c *cpuCollector) Update(ch chan<- prometheus.Metric) (err error) {
clockb, err := unix.SysctlRaw("kern.clockrate")
if err != nil {
return err
}
clock := *(*clockinfo)(unsafe.Pointer(&clockb[0]))
hz := float64(clock.stathz)
ncpus, err := unix.SysctlUint32("hw.ncpu")
if err != nil {
return err
}
var cpTime [][CPUSTATES]int64
for i := 0; i < int(ncpus); i++ {
cpb, err := unix.SysctlRaw("kern.cp_time2", i)
if err != nil && err != unix.ENODEV {
return err
}
if err != unix.ENODEV {
cpTime = append(cpTime, *(*[CPUSTATES]int64)(unsafe.Pointer(&cpb[0])))
}
}
for cpu, time := range cpTime {
lcpu := strconv.Itoa(cpu)
ch <- c.cpu.mustNewConstMetric(float64(time[CP_USER])/hz, lcpu, "user")
ch <- c.cpu.mustNewConstMetric(float64(time[CP_NICE])/hz, lcpu, "nice")
ch <- c.cpu.mustNewConstMetric(float64(time[CP_SYS])/hz, lcpu, "system")
ch <- c.cpu.mustNewConstMetric(float64(time[CP_SPIN])/hz, lcpu, "spin")
ch <- c.cpu.mustNewConstMetric(float64(time[CP_INTR])/hz, lcpu, "interrupt")
ch <- c.cpu.mustNewConstMetric(float64(time[CP_IDLE])/hz, lcpu, "idle")
}
return err
}