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publisher.go
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publisher.go
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//go:build !windows
// +build !windows
package intelrdt
import (
"context"
"strings"
"time"
"github.com/circonus-labs/circonus-unified-agent/cua"
)
// Publisher for publish new RDT metrics to cua accumulator
type Publisher struct {
acc cua.Accumulator
Log cua.Logger
BufferChanProcess chan processMeasurement
BufferChanCores chan string
errChan chan error
shortenedMetrics bool
}
func NewPublisher(acc cua.Accumulator, log cua.Logger, shortenedMetrics bool) Publisher {
return Publisher{
acc: acc,
Log: log,
shortenedMetrics: shortenedMetrics,
BufferChanProcess: make(chan processMeasurement),
BufferChanCores: make(chan string),
errChan: make(chan error),
}
}
func (p *Publisher) publish(ctx context.Context) {
go func() {
for {
select {
case newMeasurements := <-p.BufferChanCores:
p.publishCores(newMeasurements)
case newMeasurements := <-p.BufferChanProcess:
p.publishProcess(newMeasurements)
case err := <-p.errChan:
p.Log.Error(err)
case <-ctx.Done():
return
}
}
}()
}
func (p *Publisher) publishCores(measurement string) {
coresString, values, timestamp, err := parseCoresMeasurement(measurement)
if err != nil {
p.errChan <- err
}
p.addToAccumulatorCores(coresString, values, timestamp)
}
func (p *Publisher) publishProcess(measurement processMeasurement) {
process, coresString, values, timestamp, err := parseProcessesMeasurement(measurement)
if err != nil {
p.errChan <- err
}
p.addToAccumulatorProcesses(process, coresString, values, timestamp)
}
func parseCoresMeasurement(measurements string) (string, []float64, time.Time, error) {
timeValue, metricsValues, cores, err := splitCSVLineIntoValues(measurements)
if err != nil {
return "", nil, time.Time{}, err
}
timestamp, err := parseTime(timeValue)
if err != nil {
return "", nil, time.Time{}, err
}
// change string slice to one string and separate it by coma
coresString := strings.Join(cores, ",")
// trim unwanted quotes
coresString = strings.Trim(coresString, "\"")
values := make([]float64, 0, len(metricsValues))
for _, metric := range metricsValues {
parsedValue, err := parseFloat(metric)
if err != nil {
return "", nil, time.Time{}, err
}
values = append(values, parsedValue)
}
return coresString, values, timestamp, nil
}
func (p *Publisher) addToAccumulatorCores(cores string, metricsValues []float64, timestamp time.Time) {
for i, value := range metricsValues {
if p.shortenedMetrics {
//0: "IPC"
//1: "LLC_Misses"
if i == 0 || i == 1 {
continue
}
}
tags := map[string]string{}
fields := make(map[string]interface{})
tags["cores"] = cores
tags["name"] = pqosMetricOrder[i]
fields["value"] = value
p.acc.AddFields("rdt_metric", fields, tags, timestamp)
}
}
func parseProcessesMeasurement(measurement processMeasurement) (string, string, []float64, time.Time, error) {
timeValue, metricsValues, coreOrPidsValues, pids, err := parseProcessMeasurement(measurement.measurement)
if err != nil {
return "", "", nil, time.Time{}, err
}
timestamp, err := parseTime(timeValue)
if err != nil {
return "", "", nil, time.Time{}, err
}
actualProcess := measurement.name
lenOfPids := len(strings.Split(pids, ","))
cores := coreOrPidsValues[lenOfPids:]
coresString := strings.Trim(strings.Join(cores, ","), `"`)
values := make([]float64, 0, len(metricsValues))
for _, metric := range metricsValues {
parsedValue, err := parseFloat(metric)
if err != nil {
return "", "", nil, time.Time{}, err
}
values = append(values, parsedValue)
}
return actualProcess, coresString, values, timestamp, nil
}
func (p *Publisher) addToAccumulatorProcesses(process string, cores string, metricsValues []float64, timestamp time.Time) {
for i, value := range metricsValues {
if p.shortenedMetrics {
//0: "IPC"
//1: "LLC_Misses"
if i == 0 || i == 1 {
continue
}
}
tags := map[string]string{}
fields := make(map[string]interface{})
tags["process"] = process
tags["cores"] = cores
tags["name"] = pqosMetricOrder[i]
fields["value"] = value
p.acc.AddFields("rdt_metric", fields, tags, timestamp)
}
}
func parseProcessMeasurement(measurements string) (string, []string, []string, string, error) {
timeValue, metricsValues, coreOrPidsValues, err := splitCSVLineIntoValues(measurements)
if err != nil {
return "", nil, nil, "", err
}
pids, err := findPIDsInMeasurement(measurements)
if err != nil {
return "", nil, nil, "", err
}
return timeValue, metricsValues, coreOrPidsValues, pids, nil
}