benchmark: measure label resolution in MetricVec
Signed-off-by: Stephen J Day <stephen.day@docker.com>
This commit is contained in:
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25db044749
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c4004ef5f6
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@ -96,19 +96,15 @@ func NewCounterVec(opts CounterOpts, labelNames []string) *CounterVec {
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opts.ConstLabels,
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)
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return &CounterVec{
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MetricVec: MetricVec{
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children: map[uint64]Metric{},
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desc: desc,
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newMetric: func(lvs ...string) Metric {
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result := &counter{value: value{
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desc: desc,
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valType: CounterValue,
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labelPairs: makeLabelPairs(desc, lvs),
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}}
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result.init(result) // Init self-collection.
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return result
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},
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},
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MetricVec: newMetricVec(desc, func(lvs ...string) Metric {
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result := &counter{value: value{
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desc: desc,
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valType: CounterValue,
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labelPairs: makeLabelPairs(desc, lvs),
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}}
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result.init(result) // Init self-collection.
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return result
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}),
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}
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}
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@ -72,13 +72,9 @@ func NewGaugeVec(opts GaugeOpts, labelNames []string) *GaugeVec {
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opts.ConstLabels,
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)
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return &GaugeVec{
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MetricVec: MetricVec{
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children: map[uint64]Metric{},
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desc: desc,
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newMetric: func(lvs ...string) Metric {
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return newValue(desc, GaugeValue, 0, lvs...)
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},
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},
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MetricVec: newMetricVec(desc, func(lvs ...string) Metric {
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return newValue(desc, GaugeValue, 0, lvs...)
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}),
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}
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}
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@ -301,13 +301,9 @@ func NewHistogramVec(opts HistogramOpts, labelNames []string) *HistogramVec {
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opts.ConstLabels,
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)
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return &HistogramVec{
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MetricVec: MetricVec{
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children: map[uint64]Metric{},
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desc: desc,
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newMetric: func(lvs ...string) Metric {
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return newHistogram(desc, opts, lvs...)
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},
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},
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MetricVec: newMetricVec(desc, func(lvs ...string) Metric {
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return newHistogram(desc, opts, lvs...)
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}),
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}
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}
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@ -404,13 +404,9 @@ func NewSummaryVec(opts SummaryOpts, labelNames []string) *SummaryVec {
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opts.ConstLabels,
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)
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return &SummaryVec{
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MetricVec: MetricVec{
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children: map[uint64]Metric{},
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desc: desc,
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newMetric: func(lvs ...string) Metric {
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return newSummary(desc, opts, lvs...)
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},
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},
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MetricVec: newMetricVec(desc, func(lvs ...string) Metric {
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return newSummary(desc, opts, lvs...)
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}),
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}
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}
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@ -70,13 +70,9 @@ func NewUntypedVec(opts UntypedOpts, labelNames []string) *UntypedVec {
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opts.ConstLabels,
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)
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return &UntypedVec{
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MetricVec: MetricVec{
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children: map[uint64]Metric{},
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desc: desc,
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newMetric: func(lvs ...string) Metric {
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return newValue(desc, UntypedValue, 0, lvs...)
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},
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},
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MetricVec: newMetricVec(desc, func(lvs ...string) Metric {
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return newValue(desc, UntypedValue, 0, lvs...)
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}),
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}
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}
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@ -31,6 +31,16 @@ type MetricVec struct {
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newMetric func(labelValues ...string) Metric
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}
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// newMetricVec returns an initialized MetricVec. The concrete value is
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// returned for embedding into another struct.
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func newMetricVec(desc *Desc, newMetric func(lvs ...string) Metric) MetricVec {
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return MetricVec{
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children: map[uint64]Metric{},
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desc: desc,
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newMetric: newMetric,
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}
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}
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// Describe implements Collector. The length of the returned slice
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// is always one.
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func (m *MetricVec) Describe(ch chan<- *Desc) {
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@ -14,18 +14,12 @@
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package prometheus
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import (
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"fmt"
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"testing"
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)
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func TestDelete(t *testing.T) {
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desc := NewDesc("test", "helpless", []string{"l1", "l2"}, nil)
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vec := MetricVec{
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children: map[uint64]Metric{},
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desc: desc,
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newMetric: func(lvs ...string) Metric {
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return newValue(desc, UntypedValue, 0, lvs...)
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},
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}
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vec := newUntypedMetricVec("test", "helpless", []string{"l1", "l2"})
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if got, want := vec.Delete(Labels{"l1": "v1", "l2": "v2"}), false; got != want {
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t.Errorf("got %v, want %v", got, want)
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@ -57,14 +51,7 @@ func TestDelete(t *testing.T) {
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}
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func TestDeleteLabelValues(t *testing.T) {
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desc := NewDesc("test", "helpless", []string{"l1", "l2"}, nil)
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vec := MetricVec{
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children: map[uint64]Metric{},
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desc: desc,
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newMetric: func(lvs ...string) Metric {
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return newValue(desc, UntypedValue, 0, lvs...)
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},
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}
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vec := newUntypedMetricVec("test", "helpless", []string{"l1", "l2"})
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if got, want := vec.DeleteLabelValues("v1", "v2"), false; got != want {
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t.Errorf("got %v, want %v", got, want)
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@ -86,3 +73,77 @@ func TestDeleteLabelValues(t *testing.T) {
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t.Errorf("got %v, want %v", got, want)
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}
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}
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func newUntypedMetricVec(name, help string, labels []string) *MetricVec {
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desc := NewDesc("test", "helpless", labels, nil)
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vec := newMetricVec(desc, func(lvs ...string) Metric {
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return newValue(desc, UntypedValue, 0, lvs...)
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})
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return &vec
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}
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func BenchmarkMetricVecWithLabelValuesBasic(B *testing.B) {
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benchmarkMetricVecWithLabelValues(B, map[string][]string{
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"l1": []string{"onevalue"},
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"l2": []string{"twovalue"},
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})
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}
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func BenchmarkMetricVecWithLabelValues2Keys10ValueCardinality(B *testing.B) {
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benchmarkMetricVecWithLabelValuesCardinality(B, 2, 10)
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}
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func BenchmarkMetricVecWithLabelValues4Keys10ValueCardinality(B *testing.B) {
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benchmarkMetricVecWithLabelValuesCardinality(B, 4, 10)
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}
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func BenchmarkMetricVecWithLabelValues2Keys100ValueCardinality(B *testing.B) {
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benchmarkMetricVecWithLabelValuesCardinality(B, 2, 100)
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}
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func BenchmarkMetricVecWithLabelValues10Keys100ValueCardinality(B *testing.B) {
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benchmarkMetricVecWithLabelValuesCardinality(B, 10, 100)
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}
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func BenchmarkMetricVecWithLabelValues10Keys1000ValueCardinality(B *testing.B) {
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benchmarkMetricVecWithLabelValuesCardinality(B, 10, 1000)
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}
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func benchmarkMetricVecWithLabelValuesCardinality(B *testing.B, nkeys, nvalues int) {
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labels := map[string][]string{}
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for i := 0; i < nkeys; i++ {
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var (
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k = fmt.Sprintf("key-%v", i)
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vs = make([]string, 0, nvalues)
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)
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for j := 0; j < nvalues; j++ {
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vs = append(vs, fmt.Sprintf("value-%v", j))
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}
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labels[k] = vs
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}
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benchmarkMetricVecWithLabelValues(B, labels)
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}
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func benchmarkMetricVecWithLabelValues(B *testing.B, labels map[string][]string) {
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var keys []string
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for k := range labels { // map order dependent, who cares though
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keys = append(keys, k)
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}
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values := make([]string, len(labels)) // value cache for permutations
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vec := newUntypedMetricVec("test", "helpless", keys)
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B.ReportAllocs()
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B.ResetTimer()
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for i := 0; i < B.N; i++ {
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// varies input across provide map entries based on key size.
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for j, k := range keys {
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candidates := labels[k]
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values[j] = candidates[i%len(candidates)]
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}
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vec.WithLabelValues(values...)
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}
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}
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