plugeth/metrics/metrics_test.go
Anton Evangelatov ae9f97221a metrics: pull library and introduce ResettingTimer and InfluxDB reporter (#15910)
* go-metrics: fork library and introduce ResettingTimer and InfluxDB reporter.

* vendor: change nonsense/go-metrics to ethersphere/go-metrics

* go-metrics: add tests. move ResettingTimer logic from reporter to type.

* all, metrics: pull in metrics package in go-ethereum

* metrics/test: make sure metrics are enabled for tests

* metrics: apply gosimple rules

* metrics/exp, internal/debug: init expvar endpoint when starting pprof server

* internal/debug: tiny comment formatting fix
2018-02-23 11:56:08 +02:00

125 lines
2.0 KiB
Go

package metrics
import (
"fmt"
"io/ioutil"
"log"
"sync"
"testing"
)
const FANOUT = 128
// Stop the compiler from complaining during debugging.
var (
_ = ioutil.Discard
_ = log.LstdFlags
)
func BenchmarkMetrics(b *testing.B) {
r := NewRegistry()
c := NewRegisteredCounter("counter", r)
g := NewRegisteredGauge("gauge", r)
gf := NewRegisteredGaugeFloat64("gaugefloat64", r)
h := NewRegisteredHistogram("histogram", r, NewUniformSample(100))
m := NewRegisteredMeter("meter", r)
t := NewRegisteredTimer("timer", r)
RegisterDebugGCStats(r)
RegisterRuntimeMemStats(r)
b.ResetTimer()
ch := make(chan bool)
wgD := &sync.WaitGroup{}
/*
wgD.Add(1)
go func() {
defer wgD.Done()
//log.Println("go CaptureDebugGCStats")
for {
select {
case <-ch:
//log.Println("done CaptureDebugGCStats")
return
default:
CaptureDebugGCStatsOnce(r)
}
}
}()
//*/
wgR := &sync.WaitGroup{}
//*
wgR.Add(1)
go func() {
defer wgR.Done()
//log.Println("go CaptureRuntimeMemStats")
for {
select {
case <-ch:
//log.Println("done CaptureRuntimeMemStats")
return
default:
CaptureRuntimeMemStatsOnce(r)
}
}
}()
//*/
wgW := &sync.WaitGroup{}
/*
wgW.Add(1)
go func() {
defer wgW.Done()
//log.Println("go Write")
for {
select {
case <-ch:
//log.Println("done Write")
return
default:
WriteOnce(r, ioutil.Discard)
}
}
}()
//*/
wg := &sync.WaitGroup{}
wg.Add(FANOUT)
for i := 0; i < FANOUT; i++ {
go func(i int) {
defer wg.Done()
//log.Println("go", i)
for i := 0; i < b.N; i++ {
c.Inc(1)
g.Update(int64(i))
gf.Update(float64(i))
h.Update(int64(i))
m.Mark(1)
t.Update(1)
}
//log.Println("done", i)
}(i)
}
wg.Wait()
close(ch)
wgD.Wait()
wgR.Wait()
wgW.Wait()
}
func Example() {
c := NewCounter()
Register("money", c)
c.Inc(17)
// Threadsafe registration
t := GetOrRegisterTimer("db.get.latency", nil)
t.Time(func() {})
t.Update(1)
fmt.Println(c.Count())
fmt.Println(t.Min())
// Output: 17
// 1
}