cc-metric-collector/internal/ccTopology/ccTopology.go

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package ccTopology
import (
"fmt"
"io/ioutil"
"log"
"os"
"path/filepath"
"regexp"
"strconv"
"strings"
cclogger "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
)
const SYSFS_NUMABASE = `/sys/devices/system/node`
const SYSFS_CPUBASE = `/sys/devices/system/cpu`
const PROCFS_CPUINFO = `/proc/cpuinfo`
// intArrayContains scans an array of ints if the value str is present in the array
// If the specified value is found, the corresponding array index is returned.
// The bool value is used to signal success or failure
func intArrayContains(array []int, str int) (int, bool) {
for i, a := range array {
if a == str {
return i, true
}
}
return -1, false
}
func fileToInt(path string) int {
buffer, err := ioutil.ReadFile(path)
if err != nil {
log.Print(err)
cclogger.ComponentError("ccTopology", "Reading", path, ":", err.Error())
return -1
}
sbuffer := strings.Replace(string(buffer), "\n", "", -1)
var id int64
//_, err = fmt.Scanf("%d", sbuffer, &id)
id, err = strconv.ParseInt(sbuffer, 10, 32)
if err != nil {
cclogger.ComponentError("ccTopology", "Parsing", path, ":", sbuffer, err.Error())
return -1
}
return int(id)
}
func SocketList() []int {
buffer, err := ioutil.ReadFile(string(PROCFS_CPUINFO))
if err != nil {
log.Print(err)
return nil
}
ll := strings.Split(string(buffer), "\n")
var packs []int
for _, line := range ll {
if strings.HasPrefix(line, "physical id") {
lv := strings.Fields(line)
id, err := strconv.ParseInt(lv[3], 10, 32)
if err != nil {
log.Print(err)
return packs
}
_, found := intArrayContains(packs, int(id))
if !found {
packs = append(packs, int(id))
}
}
}
return packs
}
func CpuList() []int {
buffer, err := ioutil.ReadFile(string(PROCFS_CPUINFO))
if err != nil {
log.Print(err)
return nil
}
ll := strings.Split(string(buffer), "\n")
cpulist := make([]int, 0)
for _, line := range ll {
if strings.HasPrefix(line, "processor") {
lv := strings.Fields(line)
id, err := strconv.ParseInt(lv[2], 10, 32)
if err != nil {
log.Print(err)
return cpulist
}
_, found := intArrayContains(cpulist, int(id))
if !found {
cpulist = append(cpulist, int(id))
}
}
}
return cpulist
}
func CoreList() []int {
buffer, err := ioutil.ReadFile(string(PROCFS_CPUINFO))
if err != nil {
log.Print(err)
return nil
}
ll := strings.Split(string(buffer), "\n")
corelist := make([]int, 0)
for _, line := range ll {
if strings.HasPrefix(line, "core id") {
lv := strings.Fields(line)
id, err := strconv.ParseInt(lv[3], 10, 32)
if err != nil {
log.Print(err)
return corelist
}
_, found := intArrayContains(corelist, int(id))
if !found {
corelist = append(corelist, int(id))
}
}
}
return corelist
}
func NumaNodeList() []int {
numaList := make([]int, 0)
globPath := filepath.Join(string(SYSFS_NUMABASE), "node*")
regexPath := filepath.Join(string(SYSFS_NUMABASE), "node(\\d+)")
regex := regexp.MustCompile(regexPath)
files, err := filepath.Glob(globPath)
if err != nil {
cclogger.ComponentError("CCTopology", "NumaNodeList", err.Error())
}
for _, f := range files {
if !regex.MatchString(f) {
continue
}
finfo, err := os.Lstat(f)
if err != nil {
continue
}
if !finfo.IsDir() {
continue
}
matches := regex.FindStringSubmatch(f)
if len(matches) == 2 {
id, err := strconv.Atoi(matches[1])
if err == nil {
if _, found := intArrayContains(numaList, id); !found {
numaList = append(numaList, id)
}
}
}
}
return numaList
}
func DieList() []int {
cpulist := CpuList()
dielist := make([]int, 0)
for _, c := range cpulist {
diepath := filepath.Join(string(SYSFS_CPUBASE), fmt.Sprintf("cpu%d", c), "topology/die_id")
dieid := fileToInt(diepath)
if dieid > 0 {
_, found := intArrayContains(dielist, int(dieid))
if !found {
dielist = append(dielist, int(dieid))
}
}
}
if len(dielist) > 0 {
return dielist
}
return SocketList()
}
type CpuEntry struct {
Cpuid int
SMT int
Core int
Socket int
Numadomain int
Die int
}
func CpuData() []CpuEntry {
fileToInt := func(path string) int {
buffer, err := ioutil.ReadFile(path)
if err != nil {
log.Print(err)
//cclogger.ComponentError("ccTopology", "Reading", path, ":", err.Error())
return -1
}
sbuffer := strings.Replace(string(buffer), "\n", "", -1)
var id int64
//_, err = fmt.Scanf("%d", sbuffer, &id)
id, err = strconv.ParseInt(sbuffer, 10, 32)
if err != nil {
cclogger.ComponentError("ccTopology", "Parsing", path, ":", sbuffer, err.Error())
return -1
}
return int(id)
}
getCore := func(basepath string) int {
return fileToInt(fmt.Sprintf("%s/core_id", basepath))
}
getSocket := func(basepath string) int {
return fileToInt(fmt.Sprintf("%s/physical_package_id", basepath))
}
getDie := func(basepath string) int {
return fileToInt(fmt.Sprintf("%s/die_id", basepath))
}
getSMT := func(cpuid int, basepath string) int {
buffer, err := ioutil.ReadFile(fmt.Sprintf("%s/thread_siblings_list", basepath))
if err != nil {
cclogger.ComponentError("CCTopology", "CpuData:getSMT", err.Error())
}
threadlist := make([]int, 0)
sbuffer := strings.Replace(string(buffer), "\n", "", -1)
for _, x := range strings.Split(sbuffer, ",") {
id, err := strconv.ParseInt(x, 10, 32)
if err != nil {
cclogger.ComponentError("CCTopology", "CpuData:getSMT", err.Error())
}
threadlist = append(threadlist, int(id))
}
for i, x := range threadlist {
if x == cpuid {
return i
}
}
return 1
}
getNumaDomain := func(basepath string) int {
globPath := filepath.Join(basepath, "node*")
regexPath := filepath.Join(basepath, "node(\\d+)")
regex := regexp.MustCompile(regexPath)
files, err := filepath.Glob(globPath)
if err != nil {
cclogger.ComponentError("CCTopology", "CpuData:getNumaDomain", err.Error())
}
for _, f := range files {
finfo, err := os.Lstat(f)
if err == nil && finfo.IsDir() {
matches := regex.FindStringSubmatch(f)
if len(matches) == 2 {
id, err := strconv.Atoi(matches[1])
if err == nil {
return id
}
}
}
}
return 0
}
clist := make([]CpuEntry, 0)
for _, c := range CpuList() {
clist = append(clist, CpuEntry{Cpuid: c})
}
for i, centry := range clist {
centry.Socket = -1
centry.Numadomain = -1
centry.Die = -1
centry.Core = -1
// Set base directory for topology lookup
cpustr := fmt.Sprintf("cpu%d", centry.Cpuid)
base := filepath.Join("/sys/devices/system/cpu", cpustr)
topoBase := filepath.Join(base, "topology")
// Lookup CPU core id
centry.Core = getCore(topoBase)
// Lookup CPU socket id
centry.Socket = getSocket(topoBase)
// Lookup CPU die id
centry.Die = getDie(topoBase)
if centry.Die < 0 {
centry.Die = centry.Socket
}
// Lookup SMT thread id
centry.SMT = getSMT(centry.Cpuid, topoBase)
// Lookup NUMA domain id
centry.Numadomain = getNumaDomain(base)
// Update values in output list
clist[i] = centry
}
return clist
}
type CpuInformation struct {
NumHWthreads int
SMTWidth int
NumSockets int
NumDies int
NumCores int
NumNumaDomains int
}
func CpuInfo() CpuInformation {
var c CpuInformation
smtList := make([]int, 0)
numaList := make([]int, 0)
dieList := make([]int, 0)
socketList := make([]int, 0)
coreList := make([]int, 0)
cdata := CpuData()
for _, d := range cdata {
if _, ok := intArrayContains(smtList, d.SMT); !ok {
smtList = append(smtList, d.SMT)
}
if _, ok := intArrayContains(numaList, d.Numadomain); !ok {
numaList = append(numaList, d.Numadomain)
}
if _, ok := intArrayContains(dieList, d.Die); !ok {
dieList = append(dieList, d.Die)
}
if _, ok := intArrayContains(socketList, d.Socket); !ok {
socketList = append(socketList, d.Socket)
}
if _, ok := intArrayContains(coreList, d.Core); !ok {
coreList = append(coreList, d.Core)
}
}
c.NumNumaDomains = len(numaList)
c.SMTWidth = len(smtList)
c.NumDies = len(dieList)
c.NumCores = len(coreList)
c.NumSockets = len(socketList)
c.NumHWthreads = len(cdata)
return c
}
func GetCpuSocket(cpuid int) int {
cdata := CpuData()
for _, d := range cdata {
if d.Cpuid == cpuid {
return d.Socket
}
}
return -1
}
func GetCpuNumaDomain(cpuid int) int {
cdata := CpuData()
for _, d := range cdata {
if d.Cpuid == cpuid {
return d.Numadomain
}
}
return -1
}
func GetCpuDie(cpuid int) int {
cdata := CpuData()
for _, d := range cdata {
if d.Cpuid == cpuid {
return d.Die
}
}
return -1
}
func GetCpuCore(cpuid int) int {
cdata := CpuData()
for _, d := range cdata {
if d.Cpuid == cpuid {
return d.Core
}
}
return -1
}
func GetSocketCpus(socket int) []int {
all := CpuData()
cpulist := make([]int, 0)
for _, d := range all {
if d.Socket == socket {
cpulist = append(cpulist, d.Cpuid)
}
}
return cpulist
}
func GetNumaDomainCpus(domain int) []int {
all := CpuData()
cpulist := make([]int, 0)
for _, d := range all {
if d.Numadomain == domain {
cpulist = append(cpulist, d.Cpuid)
}
}
return cpulist
}
func GetDieCpus(die int) []int {
all := CpuData()
cpulist := make([]int, 0)
for _, d := range all {
if d.Die == die {
cpulist = append(cpulist, d.Cpuid)
}
}
return cpulist
}
func GetCoreCpus(core int) []int {
all := CpuData()
cpulist := make([]int, 0)
for _, d := range all {
if d.Core == core {
cpulist = append(cpulist, d.Cpuid)
}
}
return cpulist
}