mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-27 22:49:44 -08:00
111 lines
2.4 KiB
Go
111 lines
2.4 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.
|
|
|
|
//go:build !nointerrupts
|
|
// +build !nointerrupts
|
|
|
|
package collector
|
|
|
|
import (
|
|
"fmt"
|
|
"strconv"
|
|
"unsafe"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
const (
|
|
KERN_INTRCNT = 63
|
|
KERN_INTRCNT_NUM = 1
|
|
KERN_INTRCNT_CNT = 2
|
|
KERN_INTRCNT_NAME = 3
|
|
KERN_INTRCNT_VECTOR = 4
|
|
)
|
|
|
|
func nintr() _C_int {
|
|
mib := [3]_C_int{unix.CTL_KERN, KERN_INTRCNT, KERN_INTRCNT_NUM}
|
|
buf, err := sysctl(mib[:])
|
|
if err != nil {
|
|
return 0
|
|
}
|
|
return *(*_C_int)(unsafe.Pointer(&buf[0]))
|
|
}
|
|
|
|
func intr(idx _C_int) (itr interrupt, err error) {
|
|
mib := [4]_C_int{unix.CTL_KERN, KERN_INTRCNT, KERN_INTRCNT_NAME, idx}
|
|
buf, err := sysctl(mib[:])
|
|
if err != nil {
|
|
return
|
|
}
|
|
dev := *(*[128]byte)(unsafe.Pointer(&buf[0]))
|
|
itr.device = string(dev[:])
|
|
|
|
mib[2] = KERN_INTRCNT_VECTOR
|
|
buf, err = sysctl(mib[:])
|
|
if err != nil {
|
|
return
|
|
}
|
|
itr.vector = *(*int)(unsafe.Pointer(&buf[0]))
|
|
|
|
mib[2] = KERN_INTRCNT_CNT
|
|
buf, err = sysctl(mib[:])
|
|
if err != nil {
|
|
return
|
|
}
|
|
count := *(*uint64)(unsafe.Pointer(&buf[0]))
|
|
itr.values = []float64{float64(count)}
|
|
return
|
|
}
|
|
|
|
var interruptLabelNames = []string{"cpu", "type", "devices"}
|
|
|
|
func (c *interruptsCollector) Update(ch chan<- prometheus.Metric) error {
|
|
interrupts, err := getInterrupts()
|
|
if err != nil {
|
|
return fmt.Errorf("couldn't get interrupts: %s", err)
|
|
}
|
|
for dev, interrupt := range interrupts {
|
|
for cpuNo, value := range interrupt.values {
|
|
ch <- c.desc.mustNewConstMetric(
|
|
value,
|
|
strconv.Itoa(cpuNo),
|
|
fmt.Sprintf("%d", interrupt.vector),
|
|
dev,
|
|
)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
type interrupt struct {
|
|
vector int
|
|
device string
|
|
values []float64
|
|
}
|
|
|
|
func getInterrupts() (map[string]interrupt, error) {
|
|
var interrupts = map[string]interrupt{}
|
|
n := nintr()
|
|
|
|
for i := _C_int(0); i < n; i++ {
|
|
itr, err := intr(i)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
interrupts[itr.device] = itr
|
|
}
|
|
|
|
return interrupts, nil
|
|
}
|