mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-21 14:44:00 +00:00
98 lines
2.6 KiB
Go
98 lines
2.6 KiB
Go
// Copyright 2022 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.
|
|
|
|
package procfs
|
|
|
|
import (
|
|
"bufio"
|
|
"bytes"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/prometheus/procfs/internal/util"
|
|
)
|
|
|
|
// Interrupt represents a single interrupt line.
|
|
type Interrupt struct {
|
|
// Info is the type of interrupt.
|
|
Info string
|
|
// Devices is the name of the device that is located at that IRQ
|
|
Devices string
|
|
// Values is the number of interrupts per CPU.
|
|
Values []string
|
|
}
|
|
|
|
// Interrupts models the content of /proc/interrupts. Key is the IRQ number.
|
|
// - https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/deployment_guide/s2-proc-interrupts
|
|
// - https://raspberrypi.stackexchange.com/questions/105802/explanation-of-proc-interrupts-output
|
|
type Interrupts map[string]Interrupt
|
|
|
|
// Interrupts creates a new instance from a given Proc instance.
|
|
func (p Proc) Interrupts() (Interrupts, error) {
|
|
data, err := util.ReadFileNoStat(p.path("interrupts"))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return parseInterrupts(bytes.NewReader(data))
|
|
}
|
|
|
|
func parseInterrupts(r io.Reader) (Interrupts, error) {
|
|
var (
|
|
interrupts = Interrupts{}
|
|
scanner = bufio.NewScanner(r)
|
|
)
|
|
|
|
if !scanner.Scan() {
|
|
return nil, errors.New("interrupts empty")
|
|
}
|
|
cpuNum := len(strings.Fields(scanner.Text())) // one header per cpu
|
|
|
|
for scanner.Scan() {
|
|
parts := strings.Fields(scanner.Text())
|
|
if len(parts) == 0 { // skip empty lines
|
|
continue
|
|
}
|
|
if len(parts) < 2 {
|
|
return nil, fmt.Errorf("not enough fields in interrupts (expected at least 2 fields but got %d): %s", len(parts), parts)
|
|
}
|
|
intName := parts[0][:len(parts[0])-1] // remove trailing :
|
|
|
|
if len(parts) == 2 {
|
|
interrupts[intName] = Interrupt{
|
|
Info: "",
|
|
Devices: "",
|
|
Values: []string{
|
|
parts[1],
|
|
},
|
|
}
|
|
continue
|
|
}
|
|
|
|
intr := Interrupt{
|
|
Values: parts[1 : cpuNum+1],
|
|
}
|
|
|
|
if _, err := strconv.Atoi(intName); err == nil { // numeral interrupt
|
|
intr.Info = parts[cpuNum+1]
|
|
intr.Devices = strings.Join(parts[cpuNum+2:], " ")
|
|
} else {
|
|
intr.Info = strings.Join(parts[cpuNum+1:], " ")
|
|
}
|
|
interrupts[intName] = intr
|
|
}
|
|
|
|
return interrupts, scanner.Err()
|
|
}
|