mirror of
https://github.com/ethereum/go-ethereum.git
synced 2026-05-24 08:49:29 +00:00
7118cc2fc9
resetting timers and resetting samples now track cumulative count and sum across snapshots so that prometheus _count and _sum metrics monotonically increase as required by the prometheus spec. the per-window values and percentiles still reset normally.
291 lines
7.5 KiB
Go
291 lines
7.5 KiB
Go
package metrics
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import (
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"testing"
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"time"
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)
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func TestResettingTimerCumulativeCountAndSum(t *testing.T) {
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timer := NewResettingTimer()
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// First batch of updates.
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timer.Update(10 * time.Millisecond)
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timer.Update(20 * time.Millisecond)
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timer.Update(30 * time.Millisecond)
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snap1 := timer.Snapshot()
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if have, want := snap1.Count(), 3; have != want {
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t.Fatalf("snap1 count: have %d, want %d", have, want)
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}
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if have, want := snap1.TotalCount(), int64(3); have != want {
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t.Fatalf("snap1 total count: have %d, want %d", have, want)
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}
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wantSum1 := int64(10*time.Millisecond + 20*time.Millisecond + 30*time.Millisecond)
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if have := snap1.TotalSum(); have != wantSum1 {
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t.Fatalf("snap1 total sum: have %d, want %d", have, wantSum1)
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}
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// Second batch of updates (after snapshot reset the values).
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timer.Update(40 * time.Millisecond)
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timer.Update(50 * time.Millisecond)
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snap2 := timer.Snapshot()
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// Per-window count should be 2.
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if have, want := snap2.Count(), 2; have != want {
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t.Fatalf("snap2 count: have %d, want %d", have, want)
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}
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// Cumulative count should be 5 (3 + 2).
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if have, want := snap2.TotalCount(), int64(5); have != want {
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t.Fatalf("snap2 total count: have %d, want %d", have, want)
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}
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// Cumulative sum should include both batches.
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wantSum2 := wantSum1 + int64(40*time.Millisecond+50*time.Millisecond)
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if have := snap2.TotalSum(); have != wantSum2 {
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t.Fatalf("snap2 total sum: have %d, want %d", have, wantSum2)
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}
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// Empty snapshot should still report the same cumulative totals.
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snap3 := timer.Snapshot()
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if have, want := snap3.Count(), 0; have != want {
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t.Fatalf("snap3 count: have %d, want %d", have, want)
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}
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if have, want := snap3.TotalCount(), int64(5); have != want {
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t.Fatalf("snap3 total count: have %d, want %d", have, want)
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}
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if have := snap3.TotalSum(); have != wantSum2 {
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t.Fatalf("snap3 total sum: have %d, want %d", have, wantSum2)
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}
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}
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func TestResettingSampleCumulativeCountAndSum(t *testing.T) {
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Enable()
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s := ResettingSample(NewUniformSample(100))
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// First batch.
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s.Update(10)
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s.Update(20)
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s.Update(30)
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snap1 := s.Snapshot()
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if have, want := snap1.Count(), int64(3); have != want {
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t.Fatalf("snap1 count: have %d, want %d", have, want)
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}
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if have, want := snap1.Sum(), int64(60); have != want {
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t.Fatalf("snap1 sum: have %d, want %d", have, want)
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}
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// Second batch.
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s.Update(40)
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s.Update(50)
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snap2 := s.Snapshot()
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// Count should be cumulative: 3 + 2 = 5.
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if have, want := snap2.Count(), int64(5); have != want {
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t.Fatalf("snap2 count: have %d, want %d", have, want)
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}
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// Sum should be cumulative: 60 + 90 = 150.
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if have, want := snap2.Sum(), int64(150); have != want {
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t.Fatalf("snap2 sum: have %d, want %d", have, want)
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}
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// Empty snapshot should still report cumulative totals.
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snap3 := s.Snapshot()
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if have, want := snap3.Count(), int64(5); have != want {
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t.Fatalf("snap3 count: have %d, want %d", have, want)
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}
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if have, want := snap3.Sum(), int64(150); have != want {
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t.Fatalf("snap3 sum: have %d, want %d", have, want)
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}
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}
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func TestResettingTimer(t *testing.T) {
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tests := []struct {
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values []int64
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start int
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end int
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wantP50 float64
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wantP95 float64
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wantP99 float64
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wantMean float64
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wantMin int64
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wantMax int64
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}{
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{
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values: []int64{},
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start: 1,
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end: 11,
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wantP50: 5.5, wantP95: 10, wantP99: 10,
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wantMin: 1, wantMax: 10, wantMean: 5.5,
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},
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{
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values: []int64{},
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start: 1,
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end: 101,
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wantP50: 50.5, wantP95: 95.94999999999999, wantP99: 99.99,
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wantMin: 1, wantMax: 100, wantMean: 50.5,
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},
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{
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values: []int64{1},
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start: 0,
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end: 0,
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wantP50: 1, wantP95: 1, wantP99: 1,
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wantMin: 1, wantMax: 1, wantMean: 1,
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},
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{
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values: []int64{0},
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start: 0,
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end: 0,
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wantP50: 0, wantP95: 0, wantP99: 0,
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wantMin: 0, wantMax: 0, wantMean: 0,
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},
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{
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values: []int64{},
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start: 0,
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end: 0,
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wantP50: 0, wantP95: 0, wantP99: 0,
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wantMin: 0, wantMax: 0, wantMean: 0,
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},
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{
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values: []int64{1, 10},
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start: 0,
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end: 0,
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wantP50: 5.5, wantP95: 10, wantP99: 10,
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wantMin: 1, wantMax: 10, wantMean: 5.5,
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},
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}
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for i, tt := range tests {
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timer := NewResettingTimer()
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for i := tt.start; i < tt.end; i++ {
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tt.values = append(tt.values, int64(i))
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}
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for _, v := range tt.values {
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timer.Update(time.Duration(v))
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}
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snap := timer.Snapshot()
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ps := snap.Percentiles([]float64{0.50, 0.95, 0.99})
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if have, want := snap.Min(), tt.wantMin; have != want {
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t.Fatalf("%d: min: have %d, want %d", i, have, want)
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}
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if have, want := snap.Max(), tt.wantMax; have != want {
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t.Fatalf("%d: max: have %d, want %d", i, have, want)
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}
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if have, want := snap.Mean(), tt.wantMean; have != want {
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t.Fatalf("%d: mean: have %v, want %v", i, have, want)
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}
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if have, want := ps[0], tt.wantP50; have != want {
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t.Errorf("%d: p50: have %v, want %v", i, have, want)
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}
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if have, want := ps[1], tt.wantP95; have != want {
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t.Errorf("%d: p95: have %v, want %v", i, have, want)
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}
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if have, want := ps[2], tt.wantP99; have != want {
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t.Errorf("%d: p99: have %v, want %v", i, have, want)
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}
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}
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}
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func TestResettingTimerWithFivePercentiles(t *testing.T) {
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tests := []struct {
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values []int64
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start int
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end int
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wantP05 float64
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wantP20 float64
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wantP50 float64
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wantP95 float64
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wantP99 float64
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wantMean float64
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wantMin int64
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wantMax int64
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}{
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{
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values: []int64{},
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start: 1,
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end: 11,
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wantP05: 1, wantP20: 2.2, wantP50: 5.5, wantP95: 10, wantP99: 10,
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wantMin: 1, wantMax: 10, wantMean: 5.5,
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},
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{
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values: []int64{},
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start: 1,
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end: 101,
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wantP05: 5.050000000000001, wantP20: 20.200000000000003, wantP50: 50.5, wantP95: 95.94999999999999, wantP99: 99.99,
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wantMin: 1, wantMax: 100, wantMean: 50.5,
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},
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{
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values: []int64{1},
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start: 0,
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end: 0,
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wantP05: 1, wantP20: 1, wantP50: 1, wantP95: 1, wantP99: 1,
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wantMin: 1, wantMax: 1, wantMean: 1,
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},
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{
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values: []int64{0},
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start: 0,
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end: 0,
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wantP05: 0, wantP20: 0, wantP50: 0, wantP95: 0, wantP99: 0,
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wantMin: 0, wantMax: 0, wantMean: 0,
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},
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{
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values: []int64{},
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start: 0,
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end: 0,
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wantP05: 0, wantP20: 0, wantP50: 0, wantP95: 0, wantP99: 0,
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wantMin: 0, wantMax: 0, wantMean: 0,
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},
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{
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values: []int64{1, 10},
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start: 0,
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end: 0,
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wantP05: 1, wantP20: 1, wantP50: 5.5, wantP95: 10, wantP99: 10,
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wantMin: 1, wantMax: 10, wantMean: 5.5,
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},
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}
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for ind, tt := range tests {
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timer := NewResettingTimer()
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for i := tt.start; i < tt.end; i++ {
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tt.values = append(tt.values, int64(i))
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}
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for _, v := range tt.values {
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timer.Update(time.Duration(v))
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}
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snap := timer.Snapshot()
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ps := snap.Percentiles([]float64{0.05, 0.20, 0.50, 0.95, 0.99})
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if tt.wantMin != snap.Min() {
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t.Errorf("%d: min: got %d, want %d", ind, snap.Min(), tt.wantMin)
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}
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if tt.wantMax != snap.Max() {
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t.Errorf("%d: max: got %d, want %d", ind, snap.Max(), tt.wantMax)
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}
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if tt.wantMean != snap.Mean() {
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t.Errorf("%d: mean: got %.2f, want %.2f", ind, snap.Mean(), tt.wantMean)
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}
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if tt.wantP05 != ps[0] {
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t.Errorf("%d: p05: got %v, want %v", ind, ps[0], tt.wantP05)
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}
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if tt.wantP20 != ps[1] {
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t.Errorf("%d: p20: got %v, want %v", ind, ps[1], tt.wantP20)
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}
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if tt.wantP50 != ps[2] {
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t.Errorf("%d: p50: got %v, want %v", ind, ps[2], tt.wantP50)
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}
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if tt.wantP95 != ps[3] {
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t.Errorf("%d: p95: got %v, want %v", ind, ps[3], tt.wantP95)
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}
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if tt.wantP99 != ps[4] {
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t.Errorf("%d: p99: got %v, want %v", ind, ps[4], tt.wantP99)
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}
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}
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}
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