/
main.go
369 lines (315 loc) · 10 KB
/
main.go
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// Unless explicitly stated otherwise all files in this repository are licensed
// under the Apache License Version 2.0.
// This product includes software developed at Datadog (https://www.datadoghq.com/).
// Copyright 2016-present Datadog, Inc.
package main
import (
"bytes"
"expvar"
"flag"
"fmt"
"math/rand"
"net"
"net/http"
"os"
"runtime"
"strconv"
"sync"
"time"
log "github.com/cihub/seelog"
datadog "gopkg.in/zorkian/go-datadog-api.v2"
"github.com/n9e/n9e-agentd/staging/datadog-agent/pkg/aggregator"
"github.com/n9e/n9e-agentd/pkg/config"
"github.com/n9e/n9e-agentd/staging/datadog-agent/pkg/dogstatsd"
"github.com/n9e/n9e-agentd/pkg/forwarder"
"github.com/n9e/n9e-agentd/staging/datadog-agent/pkg/serializer"
)
const (
tMode = 1
pMode = 2
)
const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
var (
mode = flag.Int("mode", 1, "1: duration, 2: packets.")
dur = flag.Int("dur", 60, "duration for the test in seconds.")
num = flag.Int("num", 10000, "number of packets to submit.")
pps = flag.Int("pps", 1000, "packets per second.")
pad = flag.Int("pad", 2, "tag padding - determines packet size.")
ser = flag.Int("ser", 10, "number of distinct series.")
inc = flag.Int("inc", 1000, "pps increments per iteration.")
rnd = flag.Bool("rnd", false, "random series.")
brk = flag.Bool("brk", false, "find breaking point.")
apiKey = flag.String("api-key", "", "if set, results will be push to datadog.")
branchName = flag.String("branch", "", "Add a 'branch' tag to every metrics equal to the value given.")
)
type forwarderBenchStub struct {
received uint64
receivedBytes uint64
}
func (f *forwarderBenchStub) reset() {
f.received = 0
f.receivedBytes = 0
}
func (f *forwarderBenchStub) computeStats(payloads forwarder.Payloads) {
for _, payload := range payloads {
f.received++
f.receivedBytes += uint64(len(*payload))
}
}
func (f *forwarderBenchStub) Start() error {
return nil
}
func (f *forwarderBenchStub) Stop() {
return
}
func (f *forwarderBenchStub) SubmitV1Series(payloads forwarder.Payloads, extraHeaders http.Header) error {
f.computeStats(payloads)
return nil
}
func (f *forwarderBenchStub) SubmitV1Intake(payloads forwarder.Payloads, extraHeaders http.Header, priority forwarder.TransactionPriority) error {
f.computeStats(payloads)
return nil
}
func (f *forwarderBenchStub) SubmitV1CheckRuns(payloads forwarder.Payloads, extraHeaders http.Header) error {
f.computeStats(payloads)
return nil
}
func (f *forwarderBenchStub) SubmitSeries(payloads forwarder.Payloads, extraHeaders http.Header) error {
f.computeStats(payloads)
return nil
}
func (f *forwarderBenchStub) SubmitEvents(payloads forwarder.Payloads, extraHeaders http.Header) error {
f.computeStats(payloads)
return nil
}
func (f *forwarderBenchStub) SubmitServiceChecks(payloads forwarder.Payloads, extraHeaders http.Header) error {
f.computeStats(payloads)
return nil
}
func (f *forwarderBenchStub) SubmitSketchSeries(payloads forwarder.Payloads, extraHeaders http.Header) error {
f.computeStats(payloads)
return nil
}
func (f *forwarderBenchStub) SubmitHostMetadata(payloads forwarder.Payloads, extraHeaders http.Header) error {
f.computeStats(payloads)
return nil
}
func (f *forwarderBenchStub) SubmitMetadata(payloads forwarder.Payloads, extraHeaders http.Header, priority forwarder.TransactionPriority) error {
f.computeStats(payloads)
return nil
}
// NewStatsdGenerator returns a generator server
// We could use datadog-go, but I want as little overhead as possible.
func NewStatsdGenerator(uri string) (*net.UDPConn, error) {
serverAddr, addrErr := net.ResolveUDPAddr("udp", uri)
if addrErr != nil {
return nil, fmt.Errorf("dogstatsd: can't ResolveUDPAddr %s: %v", uri, addrErr)
}
cliAddr, addrErr := net.ResolveUDPAddr("udp", "localhost:0")
if addrErr != nil {
return nil, fmt.Errorf("dogstatsd: can't ResolveUDPAddr %s: %v", uri, addrErr)
}
c, err := net.DialUDP("udp", cliAddr, serverAddr)
if err != nil {
return nil, fmt.Errorf("dogstatsd: unable to establish connection %s: %v", uri, err)
}
return c, nil
}
func initLogging() error {
err := config.SetupLogger(config.LoggerName("test"), "info", "", "", false, true, false)
if err != nil {
return fmt.Errorf("Unable to initiate logger: %s", err)
}
return nil
}
// format a message from its name, value, tags and rate. Also adds global
// namespace and tags.
func buildPayload(name string, value interface{}, suffix []byte, tags []string, rate float64) string {
var buf bytes.Buffer
buf.WriteString(name)
buf.WriteString(":")
switch val := value.(type) {
case float64:
buf.Write(strconv.AppendFloat([]byte{}, val, 'f', 6, 64))
case int64:
buf.Write(strconv.AppendInt([]byte{}, val, 10))
case string:
buf.WriteString(val)
default:
// do nothing
}
buf.Write(suffix)
buf.WriteString(`|@`)
buf.WriteString(strconv.FormatFloat(rate, 'f', -1, 64))
// let's do tags
buf.WriteString("|#")
buf.WriteString(tags[0])
for _, tag := range tags[1:] {
buf.WriteString(",")
buf.WriteString(tag)
}
return buf.String()
}
func submitPacket(buf []byte, conn *net.UDPConn) error {
_, err := conn.Write(buf)
return err
}
func randomString(size int) string {
b := make([]byte, size)
for i := range b {
b[i] = letterBytes[rand.Intn(len(letterBytes))]
}
return string(b)
}
func createMetric(value float64, tags []string, name string, t int64) datadog.Metric {
unit := "package"
metricType := "gauge"
hostname, _ := os.Hostname()
return datadog.Metric{
Metric: &name,
Points: []datadog.DataPoint{{float64(t), value}},
Type: &metricType,
Host: &hostname,
Tags: tags,
Unit: &unit,
}
}
func main() {
mockConfig := config.Mock()
if err := InitLogging("info"); err != nil {
klog.Infof("Unable to replace logger, default logging will apply (highly verbose): %s", err)
}
defer log.Flush()
klog.Infof("starting benchmarking...")
flag.Parse()
f := &forwarderBenchStub{
received: 0,
receivedBytes: 0,
}
var wg sync.WaitGroup
mockConfig.Set("dogstatsd_stats_enable", true)
mockConfig.Set("dogstatsd_stats_buffer", 100)
s := serializer.NewSerializer(f, nil)
aggr := aggregator.InitAggregator(s, "localhost")
statsd, err := dogstatsd.NewServer(aggr.GetBufferedChannels(), nil)
if err != nil {
klog.Errorf("Problem allocating dogstatsd server: %s", err)
return
}
defer statsd.Stop()
uri := fmt.Sprintf("localhost:%d", config.Datadog.GetInt("dogstatsd_port"))
generator, err := NewStatsdGenerator(uri)
if err != nil {
klog.Errorf("Problem allocating statistics generator: %s", err)
return
}
defer generator.Close()
// Get memory stats from expvar:
memstatsFunc := expvar.Get("memstats").(expvar.Func)
memstats := memstatsFunc().(runtime.MemStats)
if statsd.Statistics != nil {
iteration := 0
sent := uint64(0)
processed := uint64(0)
quitGenerator := make(chan bool)
quitStatter := make(chan bool)
for ok := true; ok; ok = (*brk && processed == sent) {
rate := (*pps) + iteration*(*inc)
ticker := time.NewTicker(time.Second / time.Duration(rate))
wg.Add(1)
go func() {
sent = 0
target := uint64(*num)
var buf bytes.Buffer
var packets []string
defer wg.Done()
if !(*rnd) {
packets = make([]string, *ser)
for i := range packets {
packets[i] = buildPayload("foo.bar", rand.Int63n(1000), []byte("|g"), []string{RandomString(*pad)}, 1)
}
}
for range ticker.C {
select {
case <-quitGenerator:
quitStatter <- true
return
default:
// Do other stuff
var err error
if *rnd {
buf.Reset()
buf.WriteString("foo.")
buf.WriteString(RandomString(*ser))
err = submitPacket([]byte(buildPayload(buf.String(), rand.Int63n(1000), []byte("|g"), []string{RandomString(*pad)}, 2)), generator)
} else {
err = submitPacket([]byte(packets[rand.Int63n(int64(*ser))]), generator)
}
if err != nil {
klog.Warningf("Problem sending packet: %v", err)
}
if sent++; (*mode == pMode) && (sent == target) {
quitStatter <- true
return
}
}
}
}()
wg.Add(1)
go func() {
klog.Infof("[stats] starting stats reader")
processed = 0
quit := false
tickChan := time.NewTicker(time.Second).C
defer wg.Done()
for range tickChan {
select {
case <-quitStatter:
quit = true
case v := <-statsd.Statistics.Aggregated:
klog.Infof("[stats] [mem: %v] processed %v packets @%v ", memstats.Alloc, v.Val, v.Ts)
if quit && v.Val == 0 {
return
}
processed += uint64(v.Val)
default:
klog.Infof("[stats] no statistics were available.")
}
}
}()
// if in timed mode: sleep to quit.
if *mode == tMode {
time.Sleep(time.Second * time.Duration(*dur))
quitGenerator <- true
}
wg.Wait()
ticker.Stop()
klog.Infof("[generator] submit on packet every: %v", time.Second/time.Duration(rate))
klog.Infof("[generator] rate for iteration: %v", rate)
klog.Infof("[generator] pps for iteration: %v", float64(processed)/float64(*dur))
klog.Infof("[generator] packets submitted: %v", sent)
klog.Infof("[dogstatsd] packets processed: %v", processed)
klog.Infof("[forwarder stats] packets received: %v", f.received)
klog.Infof("[forwarder stats] bytes received: %v", f.receivedBytes)
if *apiKey != "" && *brk && processed != sent {
klog.Infof("Pushing results to DataDog backend")
t := time.Now().Unix()
client := datadog.NewClient(*apiKey, "")
tags := []string{}
if *branchName != "" {
klog.Infof("Adding branchName to tags")
tags = []string{fmt.Sprintf("branch:%s", *branchName)}
}
results := []datadog.Metric{}
results = append(results, createMetric(float64(rate), tags, "benchmark.dogstatsd.rate.loss", t))
results = append(results, createMetric(float64(processed)/float64(*dur), tags, "benchmark.dogstatsd.pps.loss", t))
err := client.PostMetrics(results)
if err != nil {
klog.Errorf("Could not post metrics: %s", err)
}
}
f.reset()
iteration++
}
}
}