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// 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"
"fmt"
"io"
"strconv"
"strings"
"github.com/prometheus/procfs/internal/util"
)
// Softirqs represents the softirq statistics.
type Softirqs struct {
Hi []uint64
Timer []uint64
NetTx []uint64
NetRx []uint64
Block []uint64
IRQPoll []uint64
Tasklet []uint64
Sched []uint64
HRTimer []uint64
RCU []uint64
}
func (fs FS) Softirqs() (Softirqs, error) {
fileName := fs.proc.Path("softirqs")
data, err := util.ReadFileNoStat(fileName)
if err != nil {
return Softirqs{}, err
}
reader := bytes.NewReader(data)
return parseSoftirqs(reader)
}
func parseSoftirqs(r io.Reader) (Softirqs, error) {
var (
softirqs = Softirqs{}
scanner = bufio.NewScanner(r)
)
if !scanner.Scan() {
return Softirqs{}, fmt.Errorf("%w: softirqs empty", ErrFileRead)
}
for scanner.Scan() {
parts := strings.Fields(scanner.Text())
var err error
// require at least one cpu
if len(parts) < 2 {
continue
}
switch {
case parts[0] == "HI:":
perCPU := parts[1:]
softirqs.Hi = make([]uint64, len(perCPU))
for i, count := range perCPU {
if softirqs.Hi[i], err = strconv.ParseUint(count, 10, 64); err != nil {
return Softirqs{}, fmt.Errorf("%w: couldn't parse %q (HI%d): %w", ErrFileParse, count, i, err)
}
}
case parts[0] == "TIMER:":
perCPU := parts[1:]
softirqs.Timer = make([]uint64, len(perCPU))
for i, count := range perCPU {
if softirqs.Timer[i], err = strconv.ParseUint(count, 10, 64); err != nil {
return Softirqs{}, fmt.Errorf("%w: couldn't parse %q (TIMER%d): %w", ErrFileParse, count, i, err)
}
}
case parts[0] == "NET_TX:":
perCPU := parts[1:]
softirqs.NetTx = make([]uint64, len(perCPU))
for i, count := range perCPU {
if softirqs.NetTx[i], err = strconv.ParseUint(count, 10, 64); err != nil {
return Softirqs{}, fmt.Errorf("%w: couldn't parse %q (NET_TX%d): %w", ErrFileParse, count, i, err)
}
}
case parts[0] == "NET_RX:":
perCPU := parts[1:]
softirqs.NetRx = make([]uint64, len(perCPU))
for i, count := range perCPU {
if softirqs.NetRx[i], err = strconv.ParseUint(count, 10, 64); err != nil {
return Softirqs{}, fmt.Errorf("%w: couldn't parse %q (NET_RX%d): %w", ErrFileParse, count, i, err)
}
}
case parts[0] == "BLOCK:":
perCPU := parts[1:]
softirqs.Block = make([]uint64, len(perCPU))
for i, count := range perCPU {
if softirqs.Block[i], err = strconv.ParseUint(count, 10, 64); err != nil {
return Softirqs{}, fmt.Errorf("%w: couldn't parse %q (BLOCK%d): %w", ErrFileParse, count, i, err)
}
}
case parts[0] == "IRQ_POLL:":
perCPU := parts[1:]
softirqs.IRQPoll = make([]uint64, len(perCPU))
for i, count := range perCPU {
if softirqs.IRQPoll[i], err = strconv.ParseUint(count, 10, 64); err != nil {
return Softirqs{}, fmt.Errorf("%w: couldn't parse %q (IRQ_POLL%d): %w", ErrFileParse, count, i, err)
}
}
case parts[0] == "TASKLET:":
perCPU := parts[1:]
softirqs.Tasklet = make([]uint64, len(perCPU))
for i, count := range perCPU {
if softirqs.Tasklet[i], err = strconv.ParseUint(count, 10, 64); err != nil {
return Softirqs{}, fmt.Errorf("%w: couldn't parse %q (TASKLET%d): %w", ErrFileParse, count, i, err)
}
}
case parts[0] == "SCHED:":
perCPU := parts[1:]
softirqs.Sched = make([]uint64, len(perCPU))
for i, count := range perCPU {
if softirqs.Sched[i], err = strconv.ParseUint(count, 10, 64); err != nil {
return Softirqs{}, fmt.Errorf("%w: couldn't parse %q (SCHED%d): %w", ErrFileParse, count, i, err)
}
}
case parts[0] == "HRTIMER:":
perCPU := parts[1:]
softirqs.HRTimer = make([]uint64, len(perCPU))
for i, count := range perCPU {
if softirqs.HRTimer[i], err = strconv.ParseUint(count, 10, 64); err != nil {
return Softirqs{}, fmt.Errorf("%w: couldn't parse %q (HRTIMER%d): %w", ErrFileParse, count, i, err)
}
}
case parts[0] == "RCU:":
perCPU := parts[1:]
softirqs.RCU = make([]uint64, len(perCPU))
for i, count := range perCPU {
if softirqs.RCU[i], err = strconv.ParseUint(count, 10, 64); err != nil {
return Softirqs{}, fmt.Errorf("%w: couldn't parse %q (RCU%d): %w", ErrFileParse, count, i, err)
}
}
}
}
if err := scanner.Err(); err != nil {
return Softirqs{}, fmt.Errorf("%w: couldn't parse softirqs: %w", ErrFileParse, err)
}
return softirqs, scanner.Err()
}