481 lines
12 KiB
Go
481 lines
12 KiB
Go
// Copyright 2019 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build linux
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package procfs
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import (
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"bufio"
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"bytes"
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"errors"
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"fmt"
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"regexp"
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"strconv"
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"strings"
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"github.com/prometheus/procfs/internal/util"
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)
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// CPUInfo contains general information about a system CPU found in /proc/cpuinfo
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type CPUInfo struct {
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Processor uint
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VendorID string
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CPUFamily string
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Model string
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ModelName string
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Stepping string
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Microcode string
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CPUMHz float64
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CacheSize string
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PhysicalID string
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Siblings uint
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CoreID string
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CPUCores uint
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APICID string
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InitialAPICID string
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FPU string
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FPUException string
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CPUIDLevel uint
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WP string
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Flags []string
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Bugs []string
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BogoMips float64
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CLFlushSize uint
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CacheAlignment uint
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AddressSizes string
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PowerManagement string
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}
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var (
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cpuinfoClockRegexp = regexp.MustCompile(`([\d.]+)`)
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cpuinfoS390XProcessorRegexp = regexp.MustCompile(`^processor\s+(\d+):.*`)
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)
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// CPUInfo returns information about current system CPUs.
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// See https://www.kernel.org/doc/Documentation/filesystems/proc.txt
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func (fs FS) CPUInfo() ([]CPUInfo, error) {
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data, err := util.ReadFileNoStat(fs.proc.Path("cpuinfo"))
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if err != nil {
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return nil, err
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}
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return parseCPUInfo(data)
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}
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func parseCPUInfoX86(info []byte) ([]CPUInfo, error) {
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scanner := bufio.NewScanner(bytes.NewReader(info))
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// find the first "processor" line
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firstLine := firstNonEmptyLine(scanner)
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if !strings.HasPrefix(firstLine, "processor") || !strings.Contains(firstLine, ":") {
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return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
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}
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field := strings.SplitN(firstLine, ": ", 2)
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v, err := strconv.ParseUint(field[1], 0, 32)
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if err != nil {
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return nil, err
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}
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firstcpu := CPUInfo{Processor: uint(v)}
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cpuinfo := []CPUInfo{firstcpu}
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i := 0
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for scanner.Scan() {
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line := scanner.Text()
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if !strings.Contains(line, ":") {
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continue
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}
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field := strings.SplitN(line, ": ", 2)
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switch strings.TrimSpace(field[0]) {
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case "processor":
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cpuinfo = append(cpuinfo, CPUInfo{}) // start of the next processor
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i++
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v, err := strconv.ParseUint(field[1], 0, 32)
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if err != nil {
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return nil, err
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}
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cpuinfo[i].Processor = uint(v)
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case "vendor", "vendor_id":
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cpuinfo[i].VendorID = field[1]
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case "cpu family":
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cpuinfo[i].CPUFamily = field[1]
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case "model":
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cpuinfo[i].Model = field[1]
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case "model name":
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cpuinfo[i].ModelName = field[1]
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case "stepping":
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cpuinfo[i].Stepping = field[1]
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case "microcode":
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cpuinfo[i].Microcode = field[1]
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case "cpu MHz":
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v, err := strconv.ParseFloat(field[1], 64)
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if err != nil {
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return nil, err
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}
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cpuinfo[i].CPUMHz = v
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case "cache size":
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cpuinfo[i].CacheSize = field[1]
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case "physical id":
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cpuinfo[i].PhysicalID = field[1]
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case "siblings":
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v, err := strconv.ParseUint(field[1], 0, 32)
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if err != nil {
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return nil, err
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}
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cpuinfo[i].Siblings = uint(v)
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case "core id":
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cpuinfo[i].CoreID = field[1]
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case "cpu cores":
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v, err := strconv.ParseUint(field[1], 0, 32)
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if err != nil {
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return nil, err
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}
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cpuinfo[i].CPUCores = uint(v)
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case "apicid":
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cpuinfo[i].APICID = field[1]
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case "initial apicid":
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cpuinfo[i].InitialAPICID = field[1]
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case "fpu":
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cpuinfo[i].FPU = field[1]
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case "fpu_exception":
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cpuinfo[i].FPUException = field[1]
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case "cpuid level":
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v, err := strconv.ParseUint(field[1], 0, 32)
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if err != nil {
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return nil, err
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}
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cpuinfo[i].CPUIDLevel = uint(v)
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case "wp":
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cpuinfo[i].WP = field[1]
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case "flags":
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cpuinfo[i].Flags = strings.Fields(field[1])
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case "bugs":
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cpuinfo[i].Bugs = strings.Fields(field[1])
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case "bogomips":
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v, err := strconv.ParseFloat(field[1], 64)
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if err != nil {
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return nil, err
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}
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cpuinfo[i].BogoMips = v
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case "clflush size":
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v, err := strconv.ParseUint(field[1], 0, 32)
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if err != nil {
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return nil, err
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}
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cpuinfo[i].CLFlushSize = uint(v)
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case "cache_alignment":
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v, err := strconv.ParseUint(field[1], 0, 32)
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if err != nil {
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return nil, err
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}
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cpuinfo[i].CacheAlignment = uint(v)
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case "address sizes":
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cpuinfo[i].AddressSizes = field[1]
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case "power management":
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cpuinfo[i].PowerManagement = field[1]
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}
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}
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return cpuinfo, nil
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}
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func parseCPUInfoARM(info []byte) ([]CPUInfo, error) {
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scanner := bufio.NewScanner(bytes.NewReader(info))
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firstLine := firstNonEmptyLine(scanner)
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match, _ := regexp.MatchString("^[Pp]rocessor", firstLine)
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if !match || !strings.Contains(firstLine, ":") {
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return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
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}
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field := strings.SplitN(firstLine, ": ", 2)
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cpuinfo := []CPUInfo{}
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featuresLine := ""
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commonCPUInfo := CPUInfo{}
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i := 0
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if strings.TrimSpace(field[0]) == "Processor" {
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commonCPUInfo = CPUInfo{ModelName: field[1]}
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i = -1
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} else {
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v, err := strconv.ParseUint(field[1], 0, 32)
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if err != nil {
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return nil, err
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}
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firstcpu := CPUInfo{Processor: uint(v)}
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cpuinfo = []CPUInfo{firstcpu}
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}
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for scanner.Scan() {
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line := scanner.Text()
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if !strings.Contains(line, ":") {
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continue
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}
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field := strings.SplitN(line, ": ", 2)
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switch strings.TrimSpace(field[0]) {
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case "processor":
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cpuinfo = append(cpuinfo, commonCPUInfo) // start of the next processor
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i++
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v, err := strconv.ParseUint(field[1], 0, 32)
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if err != nil {
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return nil, err
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}
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cpuinfo[i].Processor = uint(v)
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case "BogoMIPS":
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if i == -1 {
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cpuinfo = append(cpuinfo, commonCPUInfo) // There is only one processor
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i++
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cpuinfo[i].Processor = 0
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}
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v, err := strconv.ParseFloat(field[1], 64)
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if err != nil {
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return nil, err
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}
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cpuinfo[i].BogoMips = v
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case "Features":
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featuresLine = line
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case "model name":
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cpuinfo[i].ModelName = field[1]
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}
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}
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fields := strings.SplitN(featuresLine, ": ", 2)
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for i := range cpuinfo {
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cpuinfo[i].Flags = strings.Fields(fields[1])
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}
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return cpuinfo, nil
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}
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func parseCPUInfoS390X(info []byte) ([]CPUInfo, error) {
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scanner := bufio.NewScanner(bytes.NewReader(info))
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firstLine := firstNonEmptyLine(scanner)
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if !strings.HasPrefix(firstLine, "vendor_id") || !strings.Contains(firstLine, ":") {
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return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
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}
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field := strings.SplitN(firstLine, ": ", 2)
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cpuinfo := []CPUInfo{}
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commonCPUInfo := CPUInfo{VendorID: field[1]}
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for scanner.Scan() {
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line := scanner.Text()
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if !strings.Contains(line, ":") {
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continue
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}
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field := strings.SplitN(line, ": ", 2)
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switch strings.TrimSpace(field[0]) {
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case "bogomips per cpu":
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v, err := strconv.ParseFloat(field[1], 64)
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if err != nil {
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return nil, err
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}
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commonCPUInfo.BogoMips = v
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case "features":
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commonCPUInfo.Flags = strings.Fields(field[1])
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}
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if strings.HasPrefix(line, "processor") {
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match := cpuinfoS390XProcessorRegexp.FindStringSubmatch(line)
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if len(match) < 2 {
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return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
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}
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cpu := commonCPUInfo
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v, err := strconv.ParseUint(match[1], 0, 32)
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if err != nil {
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return nil, err
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}
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cpu.Processor = uint(v)
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cpuinfo = append(cpuinfo, cpu)
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}
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if strings.HasPrefix(line, "cpu number") {
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break
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}
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}
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i := 0
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for scanner.Scan() {
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line := scanner.Text()
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if !strings.Contains(line, ":") {
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continue
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}
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field := strings.SplitN(line, ": ", 2)
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switch strings.TrimSpace(field[0]) {
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case "cpu number":
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i++
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case "cpu MHz dynamic":
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clock := cpuinfoClockRegexp.FindString(strings.TrimSpace(field[1]))
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v, err := strconv.ParseFloat(clock, 64)
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if err != nil {
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return nil, err
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}
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cpuinfo[i].CPUMHz = v
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case "physical id":
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cpuinfo[i].PhysicalID = field[1]
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case "core id":
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cpuinfo[i].CoreID = field[1]
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case "cpu cores":
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v, err := strconv.ParseUint(field[1], 0, 32)
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if err != nil {
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return nil, err
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}
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cpuinfo[i].CPUCores = uint(v)
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case "siblings":
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v, err := strconv.ParseUint(field[1], 0, 32)
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if err != nil {
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return nil, err
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}
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cpuinfo[i].Siblings = uint(v)
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}
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}
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return cpuinfo, nil
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}
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func parseCPUInfoMips(info []byte) ([]CPUInfo, error) {
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scanner := bufio.NewScanner(bytes.NewReader(info))
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// find the first "processor" line
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firstLine := firstNonEmptyLine(scanner)
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if !strings.HasPrefix(firstLine, "system type") || !strings.Contains(firstLine, ":") {
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return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
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}
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field := strings.SplitN(firstLine, ": ", 2)
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cpuinfo := []CPUInfo{}
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systemType := field[1]
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i := 0
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for scanner.Scan() {
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line := scanner.Text()
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if !strings.Contains(line, ":") {
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continue
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}
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field := strings.SplitN(line, ": ", 2)
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switch strings.TrimSpace(field[0]) {
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case "processor":
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v, err := strconv.ParseUint(field[1], 0, 32)
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if err != nil {
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return nil, err
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}
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i = int(v)
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cpuinfo = append(cpuinfo, CPUInfo{}) // start of the next processor
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cpuinfo[i].Processor = uint(v)
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cpuinfo[i].VendorID = systemType
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case "cpu model":
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cpuinfo[i].ModelName = field[1]
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case "BogoMIPS":
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v, err := strconv.ParseFloat(field[1], 64)
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if err != nil {
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return nil, err
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}
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cpuinfo[i].BogoMips = v
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}
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}
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return cpuinfo, nil
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}
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func parseCPUInfoPPC(info []byte) ([]CPUInfo, error) {
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scanner := bufio.NewScanner(bytes.NewReader(info))
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firstLine := firstNonEmptyLine(scanner)
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if !strings.HasPrefix(firstLine, "processor") || !strings.Contains(firstLine, ":") {
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return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
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}
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field := strings.SplitN(firstLine, ": ", 2)
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v, err := strconv.ParseUint(field[1], 0, 32)
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if err != nil {
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return nil, err
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}
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firstcpu := CPUInfo{Processor: uint(v)}
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cpuinfo := []CPUInfo{firstcpu}
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i := 0
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for scanner.Scan() {
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line := scanner.Text()
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if !strings.Contains(line, ":") {
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continue
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}
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field := strings.SplitN(line, ": ", 2)
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switch strings.TrimSpace(field[0]) {
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case "processor":
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cpuinfo = append(cpuinfo, CPUInfo{}) // start of the next processor
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i++
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v, err := strconv.ParseUint(field[1], 0, 32)
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if err != nil {
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return nil, err
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}
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cpuinfo[i].Processor = uint(v)
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case "cpu":
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cpuinfo[i].VendorID = field[1]
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case "clock":
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clock := cpuinfoClockRegexp.FindString(strings.TrimSpace(field[1]))
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v, err := strconv.ParseFloat(clock, 64)
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if err != nil {
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return nil, err
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}
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cpuinfo[i].CPUMHz = v
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}
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}
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return cpuinfo, nil
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}
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func parseCPUInfoRISCV(info []byte) ([]CPUInfo, error) {
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scanner := bufio.NewScanner(bytes.NewReader(info))
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firstLine := firstNonEmptyLine(scanner)
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if !strings.HasPrefix(firstLine, "processor") || !strings.Contains(firstLine, ":") {
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return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
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}
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field := strings.SplitN(firstLine, ": ", 2)
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v, err := strconv.ParseUint(field[1], 0, 32)
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if err != nil {
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return nil, err
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}
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firstcpu := CPUInfo{Processor: uint(v)}
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cpuinfo := []CPUInfo{firstcpu}
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i := 0
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for scanner.Scan() {
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line := scanner.Text()
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if !strings.Contains(line, ":") {
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continue
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}
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field := strings.SplitN(line, ": ", 2)
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switch strings.TrimSpace(field[0]) {
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case "processor":
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v, err := strconv.ParseUint(field[1], 0, 32)
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if err != nil {
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return nil, err
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}
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i = int(v)
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cpuinfo = append(cpuinfo, CPUInfo{}) // start of the next processor
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cpuinfo[i].Processor = uint(v)
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case "hart":
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cpuinfo[i].CoreID = field[1]
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case "isa":
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cpuinfo[i].ModelName = field[1]
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}
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}
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return cpuinfo, nil
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}
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func parseCPUInfoDummy(_ []byte) ([]CPUInfo, error) { // nolint:unused,deadcode
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return nil, errors.New("not implemented")
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}
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// firstNonEmptyLine advances the scanner to the first non-empty line
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// and returns the contents of that line
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func firstNonEmptyLine(scanner *bufio.Scanner) string {
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for scanner.Scan() {
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line := scanner.Text()
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if strings.TrimSpace(line) != "" {
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return line
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}
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}
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return ""
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}
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