diff options
author | Corey Hulen <corey@hulen.com> | 2016-11-22 11:05:54 -0800 |
---|---|---|
committer | Harrison Healey <harrisonmhealey@gmail.com> | 2016-11-22 14:05:54 -0500 |
commit | 7961599b2e41c71720a42b3bfde641f7529f05fe (patch) | |
tree | 3c039e1d3790a954ba65fe551c7b348331bce994 /vendor/github.com/prometheus/client_golang/prometheus/gauge_test.go | |
parent | e033dcce8e57ed6b6684227adf9b29347e4718b3 (diff) | |
download | chat-7961599b2e41c71720a42b3bfde641f7529f05fe.tar.gz chat-7961599b2e41c71720a42b3bfde641f7529f05fe.tar.bz2 chat-7961599b2e41c71720a42b3bfde641f7529f05fe.zip |
PLT-4357 adding performance monitoring (#4622)
* WIP
* WIP
* Adding metrics collection
* updating vendor packages
* Adding metrics to config
* Adding admin console page for perf monitoring
* Updating glide
* switching to tylerb/graceful
Diffstat (limited to 'vendor/github.com/prometheus/client_golang/prometheus/gauge_test.go')
-rw-r--r-- | vendor/github.com/prometheus/client_golang/prometheus/gauge_test.go | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/gauge_test.go b/vendor/github.com/prometheus/client_golang/prometheus/gauge_test.go new file mode 100644 index 000000000..48cab4636 --- /dev/null +++ b/vendor/github.com/prometheus/client_golang/prometheus/gauge_test.go @@ -0,0 +1,182 @@ +// Copyright 2014 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "math" + "math/rand" + "sync" + "testing" + "testing/quick" + + dto "github.com/prometheus/client_model/go" +) + +func listenGaugeStream(vals, result chan float64, done chan struct{}) { + var sum float64 +outer: + for { + select { + case <-done: + close(vals) + for v := range vals { + sum += v + } + break outer + case v := <-vals: + sum += v + } + } + result <- sum + close(result) +} + +func TestGaugeConcurrency(t *testing.T) { + it := func(n uint32) bool { + mutations := int(n % 10000) + concLevel := int(n%15 + 1) + + var start, end sync.WaitGroup + start.Add(1) + end.Add(concLevel) + + sStream := make(chan float64, mutations*concLevel) + result := make(chan float64) + done := make(chan struct{}) + + go listenGaugeStream(sStream, result, done) + go func() { + end.Wait() + close(done) + }() + + gge := NewGauge(GaugeOpts{ + Name: "test_gauge", + Help: "no help can be found here", + }) + for i := 0; i < concLevel; i++ { + vals := make([]float64, mutations) + for j := 0; j < mutations; j++ { + vals[j] = rand.Float64() - 0.5 + } + + go func(vals []float64) { + start.Wait() + for _, v := range vals { + sStream <- v + gge.Add(v) + } + end.Done() + }(vals) + } + start.Done() + + if expected, got := <-result, math.Float64frombits(gge.(*value).valBits); math.Abs(expected-got) > 0.000001 { + t.Fatalf("expected approx. %f, got %f", expected, got) + return false + } + return true + } + + if err := quick.Check(it, nil); err != nil { + t.Fatal(err) + } +} + +func TestGaugeVecConcurrency(t *testing.T) { + it := func(n uint32) bool { + mutations := int(n % 10000) + concLevel := int(n%15 + 1) + vecLength := int(n%5 + 1) + + var start, end sync.WaitGroup + start.Add(1) + end.Add(concLevel) + + sStreams := make([]chan float64, vecLength) + results := make([]chan float64, vecLength) + done := make(chan struct{}) + + for i := 0; i < vecLength; i++ { + sStreams[i] = make(chan float64, mutations*concLevel) + results[i] = make(chan float64) + go listenGaugeStream(sStreams[i], results[i], done) + } + + go func() { + end.Wait() + close(done) + }() + + gge := NewGaugeVec( + GaugeOpts{ + Name: "test_gauge", + Help: "no help can be found here", + }, + []string{"label"}, + ) + for i := 0; i < concLevel; i++ { + vals := make([]float64, mutations) + pick := make([]int, mutations) + for j := 0; j < mutations; j++ { + vals[j] = rand.Float64() - 0.5 + pick[j] = rand.Intn(vecLength) + } + + go func(vals []float64) { + start.Wait() + for i, v := range vals { + sStreams[pick[i]] <- v + gge.WithLabelValues(string('A' + pick[i])).Add(v) + } + end.Done() + }(vals) + } + start.Done() + + for i := range sStreams { + if expected, got := <-results[i], math.Float64frombits(gge.WithLabelValues(string('A'+i)).(*value).valBits); math.Abs(expected-got) > 0.000001 { + t.Fatalf("expected approx. %f, got %f", expected, got) + return false + } + } + return true + } + + if err := quick.Check(it, nil); err != nil { + t.Fatal(err) + } +} + +func TestGaugeFunc(t *testing.T) { + gf := NewGaugeFunc( + GaugeOpts{ + Name: "test_name", + Help: "test help", + ConstLabels: Labels{"a": "1", "b": "2"}, + }, + func() float64 { return 3.1415 }, + ) + + if expected, got := `Desc{fqName: "test_name", help: "test help", constLabels: {a="1",b="2"}, variableLabels: []}`, gf.Desc().String(); expected != got { + t.Errorf("expected %q, got %q", expected, got) + } + + m := &dto.Metric{} + gf.Write(m) + + if expected, got := `label:<name:"a" value:"1" > label:<name:"b" value:"2" > gauge:<value:3.1415 > `, m.String(); expected != got { + t.Errorf("expected %q, got %q", expected, got) + } +} |