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likwidMetric.go
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likwidMetric.go
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package collectors
/*
#cgo CFLAGS: -I./likwid
#cgo LDFLAGS: -Wl,--unresolved-symbols=ignore-in-object-files
#include <stdlib.h>
#include <likwid.h>
*/
import "C"
import (
"encoding/json"
"errors"
"fmt"
"math"
"os"
"os/signal"
"os/user"
"sort"
"strconv"
"strings"
"sync"
"syscall"
"time"
"unsafe"
agg "github.com/ClusterCockpit/cc-metric-collector/internal/metricAggregator"
cclog "github.com/ClusterCockpit/cc-metric-collector/pkg/ccLogger"
lp "github.com/ClusterCockpit/cc-metric-collector/pkg/ccMetric"
topo "github.com/ClusterCockpit/cc-metric-collector/pkg/ccTopology"
"github.com/NVIDIA/go-nvml/pkg/dl"
"golang.design/x/thread"
fsnotify "gopkg.in/fsnotify.v1"
)
const (
LIKWID_LIB_NAME = "liblikwid.so"
LIKWID_LIB_DL_FLAGS = dl.RTLD_LAZY | dl.RTLD_GLOBAL
LIKWID_DEF_ACCESSMODE = "direct"
LIKWID_DEF_LOCKFILE = "/var/run/likwid.lock"
)
type LikwidCollectorMetricConfig struct {
Name string `json:"name"` // Name of the metric
Calc string `json:"calc"` // Calculation for the metric using
Type string `json:"type"` // Metric type (aka node, socket, cpu, ...)
Publish bool `json:"publish"`
Unit string `json:"unit"` // Unit of metric if any
}
type LikwidCollectorEventsetConfig struct {
Events map[string]string `json:"events"`
Metrics []LikwidCollectorMetricConfig `json:"metrics"`
}
type LikwidEventsetConfig struct {
internal int
gid C.int
eorder []*C.char
estr *C.char
go_estr string
results map[int]map[string]interface{}
metrics map[int]map[string]float64
}
type LikwidCollectorConfig struct {
Eventsets []LikwidCollectorEventsetConfig `json:"eventsets"`
Metrics []LikwidCollectorMetricConfig `json:"globalmetrics,omitempty"`
ForceOverwrite bool `json:"force_overwrite,omitempty"`
InvalidToZero bool `json:"invalid_to_zero,omitempty"`
AccessMode string `json:"access_mode,omitempty"`
DaemonPath string `json:"accessdaemon_path,omitempty"`
LibraryPath string `json:"liblikwid_path,omitempty"`
LockfilePath string `json:"lockfile_path,omitempty"`
}
type LikwidCollector struct {
metricCollector
cpulist []C.int
cpu2tid map[int]int
sock2tid map[int]int
metrics map[C.int]map[string]int
groups []C.int
config LikwidCollectorConfig
gmresults map[int]map[string]float64
basefreq float64
running bool
initialized bool
needs_reinit bool
likwidGroups map[C.int]LikwidEventsetConfig
lock sync.Mutex
measureThread thread.Thread
}
type LikwidMetric struct {
name string
search string
scope string
group_idx int
}
func checkMetricType(t string) bool {
valid := map[string]bool{
"node": true,
"socket": true,
"hwthread": true,
"core": true,
"memoryDomain": true,
}
_, ok := valid[t]
return ok
}
func eventsToEventStr(events map[string]string) string {
elist := make([]string, 0)
for k, v := range events {
elist = append(elist, fmt.Sprintf("%s:%s", v, k))
}
return strings.Join(elist, ",")
}
func genLikwidEventSet(input LikwidCollectorEventsetConfig) LikwidEventsetConfig {
tmplist := make([]string, 0)
clist := make([]string, 0)
for k := range input.Events {
clist = append(clist, k)
}
sort.Strings(clist)
elist := make([]*C.char, 0)
for _, k := range clist {
v := input.Events[k]
tmplist = append(tmplist, fmt.Sprintf("%s:%s", v, k))
c_counter := C.CString(k)
elist = append(elist, c_counter)
}
estr := strings.Join(tmplist, ",")
res := make(map[int]map[string]interface{})
met := make(map[int]map[string]float64)
for _, i := range topo.CpuList() {
res[i] = make(map[string]interface{})
for k := range input.Events {
res[i][k] = 0.0
}
met[i] = make(map[string]float64)
for _, v := range input.Metrics {
res[i][v.Name] = 0.0
}
}
return LikwidEventsetConfig{
gid: -1,
eorder: elist,
estr: C.CString(estr),
go_estr: estr,
results: res,
metrics: met,
}
}
func testLikwidMetricFormula(formula string, params []string) bool {
myparams := make(map[string]interface{})
for _, p := range params {
myparams[p] = float64(1.0)
}
_, err := agg.EvalFloat64Condition(formula, myparams)
return err == nil
}
func getBaseFreq() float64 {
files := []string{
"/sys/devices/system/cpu/cpu0/cpufreq/bios_limit",
"/sys/devices/system/cpu/cpu0/cpufreq/base_frequency",
}
var freq float64 = math.NaN()
for _, f := range files {
buffer, err := os.ReadFile(f)
if err == nil {
data := strings.Replace(string(buffer), "\n", "", -1)
x, err := strconv.ParseInt(data, 0, 64)
if err == nil {
freq = float64(x)
break
}
}
}
if math.IsNaN(freq) {
C.power_init(0)
info := C.get_powerInfo()
if float64(info.baseFrequency) != 0 {
freq = float64(info.baseFrequency)
}
C.power_finalize()
}
return freq * 1e3
}
func (m *LikwidCollector) Init(config json.RawMessage) error {
m.name = "LikwidCollector"
m.parallel = false
m.initialized = false
m.needs_reinit = true
m.running = false
m.config.AccessMode = LIKWID_DEF_ACCESSMODE
m.config.LibraryPath = LIKWID_LIB_NAME
m.config.LockfilePath = LIKWID_DEF_LOCKFILE
if len(config) > 0 {
err := json.Unmarshal(config, &m.config)
if err != nil {
return err
}
}
lib := dl.New(m.config.LibraryPath, LIKWID_LIB_DL_FLAGS)
if lib == nil {
return fmt.Errorf("error instantiating DynamicLibrary for %s", m.config.LibraryPath)
}
err := lib.Open()
if err != nil {
return fmt.Errorf("error opening %s: %v", m.config.LibraryPath, err)
}
if m.config.ForceOverwrite {
cclog.ComponentDebug(m.name, "Set LIKWID_FORCE=1")
os.Setenv("LIKWID_FORCE", "1")
}
m.setup()
m.meta = map[string]string{"group": "PerfCounter"}
cclog.ComponentDebug(m.name, "Get cpulist and init maps and lists")
cpulist := topo.HwthreadList()
m.cpulist = make([]C.int, len(cpulist))
m.cpu2tid = make(map[int]int)
for i, c := range cpulist {
m.cpulist[i] = C.int(c)
m.cpu2tid[c] = i
}
m.likwidGroups = make(map[C.int]LikwidEventsetConfig)
// m.results = make(map[int]map[int]map[string]interface{})
// m.mresults = make(map[int]map[int]map[string]float64)
m.gmresults = make(map[int]map[string]float64)
for _, tid := range m.cpu2tid {
m.gmresults[tid] = make(map[string]float64)
}
// This is for the global metrics computation test
totalMetrics := 0
// Generate parameter list for the metric computing test
params := make([]string, 0)
params = append(params, "time", "inverseClock")
// Generate parameter list for the global metric computing test
globalParams := make([]string, 0)
globalParams = append(globalParams, "time", "inverseClock")
// We test the eventset metrics whether they can be computed at all
for _, evset := range m.config.Eventsets {
if len(evset.Events) > 0 {
params = params[:2]
for counter := range evset.Events {
params = append(params, counter)
}
for _, metric := range evset.Metrics {
// Try to evaluate the metric
cclog.ComponentDebug(m.name, "Checking", metric.Name)
if !checkMetricType(metric.Type) {
cclog.ComponentError(m.name, "Metric", metric.Name, "uses invalid type", metric.Type)
metric.Calc = ""
} else if !testLikwidMetricFormula(metric.Calc, params) {
cclog.ComponentError(m.name, "Metric", metric.Name, "cannot be calculated with given counters")
metric.Calc = ""
} else {
globalParams = append(globalParams, metric.Name)
totalMetrics++
}
}
} else {
cclog.ComponentError(m.name, "Invalid Likwid eventset config, no events given")
continue
}
}
for _, metric := range m.config.Metrics {
// Try to evaluate the global metric
if !checkMetricType(metric.Type) {
cclog.ComponentError(m.name, "Metric", metric.Name, "uses invalid type", metric.Type)
metric.Calc = ""
} else if !testLikwidMetricFormula(metric.Calc, globalParams) {
cclog.ComponentError(m.name, "Metric", metric.Name, "cannot be calculated with given counters")
metric.Calc = ""
} else if !checkMetricType(metric.Type) {
cclog.ComponentError(m.name, "Metric", metric.Name, "has invalid type")
metric.Calc = ""
} else {
totalMetrics++
}
}
// If no event set could be added, shut down LikwidCollector
if totalMetrics == 0 {
err := errors.New("no LIKWID eventset or metric usable")
cclog.ComponentError(m.name, err.Error())
return err
}
ret := C.topology_init()
if ret != 0 {
err := errors.New("failed to initialize topology module")
cclog.ComponentError(m.name, err.Error())
return err
}
m.measureThread = thread.New()
switch m.config.AccessMode {
case "direct":
m.measureThread.Call(
func() {
C.HPMmode(0)
})
case "accessdaemon":
if len(m.config.DaemonPath) > 0 {
p := os.Getenv("PATH")
os.Setenv("PATH", m.config.DaemonPath+":"+p)
}
m.measureThread.Call(
func() {
C.HPMmode(1)
retCode := C.HPMinit()
if retCode != 0 {
err := fmt.Errorf("C.HPMinit() failed with return code %v", retCode)
cclog.ComponentError(m.name, err.Error())
}
})
for _, c := range m.cpulist {
m.measureThread.Call(
func() {
retCode := C.HPMaddThread(c)
if retCode != 0 {
err := fmt.Errorf("C.HPMaddThread(%v) failed with return code %v", c, retCode)
cclog.ComponentError(m.name, err.Error())
}
})
}
}
m.sock2tid = make(map[int]int)
tmp := make([]C.int, 1)
for _, sid := range topo.SocketList() {
cstr := C.CString(fmt.Sprintf("S%d:0", sid))
ret = C.cpustr_to_cpulist(cstr, &tmp[0], 1)
if ret > 0 {
m.sock2tid[sid] = m.cpu2tid[int(tmp[0])]
}
C.free(unsafe.Pointer(cstr))
}
m.basefreq = getBaseFreq()
m.init = true
return nil
}
// take a measurement for 'interval' seconds of event set index 'group'
func (m *LikwidCollector) takeMeasurement(evidx int, evset LikwidEventsetConfig, interval time.Duration) (bool, error) {
var ret C.int
var gid C.int = -1
sigchan := make(chan os.Signal, 1)
watcher, err := fsnotify.NewWatcher()
if err != nil {
cclog.ComponentError(m.name, err.Error())
return true, err
}
defer watcher.Close()
if len(m.config.LockfilePath) > 0 {
info, err := os.Stat(m.config.LockfilePath)
if err != nil {
return true, err
}
stat := info.Sys().(*syscall.Stat_t)
if stat.Uid != uint32(os.Getuid()) {
usr, err := user.LookupId(strconv.FormatUint(uint64(stat.Uid), 10))
if err == nil {
return true, fmt.Errorf("Access to performance counters locked by %s", usr.Username)
} else {
return true, fmt.Errorf("Access to performance counters locked by %d", stat.Uid)
}
}
err = watcher.Add(m.config.LockfilePath)
if err != nil {
cclog.ComponentError(m.name, err.Error())
}
}
m.lock.Lock()
defer m.lock.Unlock()
select {
case e := <-watcher.Events:
ret = -1
if e.Op != fsnotify.Chmod {
ret = C.perfmon_init(C.int(len(m.cpulist)), &m.cpulist[0])
}
default:
ret = C.perfmon_init(C.int(len(m.cpulist)), &m.cpulist[0])
}
if ret != 0 {
return true, fmt.Errorf("failed to initialize library, error %d", ret)
}
signal.Notify(sigchan, os.Interrupt)
signal.Notify(sigchan, syscall.SIGCHLD)
select {
case <-sigchan:
gid = -1
case e := <-watcher.Events:
gid = -1
if e.Op != fsnotify.Chmod {
gid = C.perfmon_addEventSet(evset.estr)
}
default:
gid = C.perfmon_addEventSet(evset.estr)
}
if gid < 0 {
return true, fmt.Errorf("failed to add events %s, error %d", evset.go_estr, gid)
} else {
evset.gid = gid
//m.likwidGroups[gid] = evset
}
select {
case <-sigchan:
ret = -1
case e := <-watcher.Events:
if e.Op != fsnotify.Chmod {
ret = C.perfmon_setupCounters(gid)
}
default:
ret = C.perfmon_setupCounters(gid)
}
if ret != 0 {
return true, fmt.Errorf("failed to setup events '%s', error %d", evset.go_estr, ret)
}
select {
case <-sigchan:
ret = -1
case e := <-watcher.Events:
if e.Op != fsnotify.Chmod {
ret = C.perfmon_startCounters()
}
default:
ret = C.perfmon_startCounters()
}
if ret != 0 {
return true, fmt.Errorf("failed to start events '%s', error %d", evset.go_estr, ret)
}
select {
case <-sigchan:
ret = -1
case e := <-watcher.Events:
if e.Op != fsnotify.Chmod {
ret = C.perfmon_readCounters()
}
default:
ret = C.perfmon_readCounters()
}
if ret != 0 {
return true, fmt.Errorf("failed to read events '%s', error %d", evset.go_estr, ret)
}
time.Sleep(interval)
select {
case <-sigchan:
ret = -1
case e := <-watcher.Events:
if e.Op != fsnotify.Chmod {
ret = C.perfmon_readCounters()
}
default:
ret = C.perfmon_readCounters()
}
if ret != 0 {
return true, fmt.Errorf("failed to read events '%s', error %d", evset.go_estr, ret)
}
for eidx, counter := range evset.eorder {
gctr := C.GoString(counter)
for _, tid := range m.cpu2tid {
res := C.perfmon_getLastResult(gid, C.int(eidx), C.int(tid))
fres := float64(res)
if m.config.InvalidToZero && (math.IsNaN(fres) || math.IsInf(fres, 0)) {
fres = 0.0
}
evset.results[tid][gctr] = fres
}
}
for _, tid := range m.cpu2tid {
evset.results[tid]["time"] = float64(C.perfmon_getLastTimeOfGroup(gid))
}
select {
case <-sigchan:
ret = -1
case e := <-watcher.Events:
if e.Op != fsnotify.Chmod {
ret = C.perfmon_stopCounters()
}
default:
ret = C.perfmon_stopCounters()
}
if ret != 0 {
return true, fmt.Errorf("failed to stop events '%s', error %d", evset.go_estr, ret)
}
signal.Stop(sigchan)
select {
case e := <-watcher.Events:
if e.Op != fsnotify.Chmod {
C.perfmon_finalize()
}
default:
C.perfmon_finalize()
}
return false, nil
}
// Get all measurement results for an event set, derive the metric values out of the measurement results and send it
func (m *LikwidCollector) calcEventsetMetrics(evset LikwidEventsetConfig, interval time.Duration, output chan lp.CCMetric) error {
invClock := float64(1.0 / m.basefreq)
for _, tid := range m.cpu2tid {
evset.results[tid]["inverseClock"] = invClock
}
// Go over the event set metrics, derive the value out of the event:counter values and send it
for _, metric := range m.config.Eventsets[evset.internal].Metrics {
// The metric scope is determined in the Init() function
// Get the map scope-id -> tids
scopemap := m.cpu2tid
if metric.Type == "socket" {
scopemap = m.sock2tid
}
for domain, tid := range scopemap {
if tid >= 0 && len(metric.Calc) > 0 {
value, err := agg.EvalFloat64Condition(metric.Calc, evset.results[tid])
if err != nil {
cclog.ComponentError(m.name, "Calculation for metric", metric.Name, "failed:", err.Error())
value = 0.0
}
if m.config.InvalidToZero && (math.IsNaN(value) || math.IsInf(value, 0)) {
value = 0.0
}
evset.metrics[tid][metric.Name] = value
// Now we have the result, send it with the proper tags
if !math.IsNaN(value) {
if metric.Publish {
fields := map[string]interface{}{"value": value}
y, err := lp.New(metric.Name, map[string]string{"type": metric.Type}, m.meta, fields, time.Now())
if err == nil {
if metric.Type != "node" {
y.AddTag("type-id", fmt.Sprintf("%d", domain))
}
if len(metric.Unit) > 0 {
y.AddMeta("unit", metric.Unit)
}
output <- y
}
}
}
}
}
}
return nil
}
// Go over the global metrics, derive the value out of the event sets' metric values and send it
func (m *LikwidCollector) calcGlobalMetrics(groups []LikwidEventsetConfig, interval time.Duration, output chan lp.CCMetric) error {
for _, metric := range m.config.Metrics {
scopemap := m.cpu2tid
if metric.Type == "socket" {
scopemap = m.sock2tid
}
for domain, tid := range scopemap {
if tid >= 0 {
// Here we generate parameter list
params := make(map[string]interface{})
for _, evset := range groups {
for mname, mres := range evset.metrics[tid] {
params[mname] = mres
}
}
// Evaluate the metric
value, err := agg.EvalFloat64Condition(metric.Calc, params)
if err != nil {
cclog.ComponentError(m.name, "Calculation for metric", metric.Name, "failed:", err.Error())
value = 0.0
}
if m.config.InvalidToZero && (math.IsNaN(value) || math.IsInf(value, 0)) {
value = 0.0
}
//m.gmresults[tid][metric.Name] = value
// Now we have the result, send it with the proper tags
if !math.IsNaN(value) {
if metric.Publish {
tags := map[string]string{"type": metric.Type}
fields := map[string]interface{}{"value": value}
y, err := lp.New(metric.Name, tags, m.meta, fields, time.Now())
if err == nil {
if metric.Type != "node" {
y.AddTag("type-id", fmt.Sprintf("%d", domain))
}
if len(metric.Unit) > 0 {
y.AddMeta("unit", metric.Unit)
}
output <- y
}
}
}
}
}
}
return nil
}
func (m *LikwidCollector) ReadThread(interval time.Duration, output chan lp.CCMetric) {
var err error = nil
groups := make([]LikwidEventsetConfig, 0)
for evidx, evset := range m.config.Eventsets {
e := genLikwidEventSet(evset)
e.internal = evidx
skip := false
if !skip {
// measure event set 'i' for 'interval' seconds
skip, err = m.takeMeasurement(evidx, e, interval)
if err != nil {
cclog.ComponentError(m.name, err.Error())
return
}
}
if !skip {
// read measurements and derive event set metrics
m.calcEventsetMetrics(e, interval, output)
}
groups = append(groups, e)
}
// calculate global metrics
m.calcGlobalMetrics(groups, interval, output)
}
// main read function taking multiple measurement rounds, each 'interval' seconds long
func (m *LikwidCollector) Read(interval time.Duration, output chan lp.CCMetric) {
//var skip bool = false
//var err error
if !m.init {
return
}
m.measureThread.Call(func() {
m.ReadThread(interval, output)
})
}
func (m *LikwidCollector) Close() {
if m.init {
m.init = false
m.lock.Lock()
m.measureThread.Terminate()
m.initialized = false
m.lock.Unlock()
C.topology_finalize()
}
}