mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-30 07:59:53 -08:00
96 lines
2.3 KiB
Go
96 lines
2.3 KiB
Go
// 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.
|
|
|
|
// +build !nocpu
|
|
|
|
package collector
|
|
|
|
import (
|
|
"strconv"
|
|
"unsafe"
|
|
|
|
"github.com/go-kit/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
|
|
}
|