1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
package memmetrics
import (
"runtime"
"sync"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/vulcand/oxy/v2/internal/holsterv4/clock"
"github.com/vulcand/oxy/v2/testutils"
)
func TestDefaults(t *testing.T) {
done := testutils.FreezeTime()
defer done()
rr, err := NewRTMetrics()
require.NoError(t, err)
require.NotNil(t, rr)
rr.Record(200, clock.Second)
rr.Record(502, 2*clock.Second)
rr.Record(200, clock.Second)
rr.Record(200, clock.Second)
assert.EqualValues(t, 1, rr.NetworkErrorCount())
assert.EqualValues(t, 4, rr.TotalCount())
assert.Equal(t, map[int]int64{502: 1, 200: 3}, rr.StatusCodesCounts())
assert.Equal(t, float64(1)/float64(4), rr.NetworkErrorRatio())
assert.Equal(t, 1.0/3.0, rr.ResponseCodeRatio(500, 503, 200, 300))
h, err := rr.LatencyHistogram()
require.NoError(t, err)
assert.Equal(t, 2, int(h.LatencyAtQuantile(100)/clock.Second))
rr.Reset()
assert.EqualValues(t, 0, rr.NetworkErrorCount())
assert.EqualValues(t, 0, rr.TotalCount())
assert.Equal(t, map[int]int64{}, rr.StatusCodesCounts())
assert.Equal(t, float64(0), rr.NetworkErrorRatio())
assert.Equal(t, float64(0), rr.ResponseCodeRatio(500, 503, 200, 300))
h, err = rr.LatencyHistogram()
require.NoError(t, err)
assert.Equal(t, time.Duration(0), h.LatencyAtQuantile(100))
}
func TestAppend(t *testing.T) {
done := testutils.FreezeTime()
defer done()
rr, err := NewRTMetrics()
require.NoError(t, err)
require.NotNil(t, rr)
rr.Record(200, clock.Second)
rr.Record(502, 2*clock.Second)
rr.Record(200, clock.Second)
rr.Record(200, clock.Second)
rr2, err := NewRTMetrics()
require.NoError(t, err)
require.NotNil(t, rr2)
rr2.Record(200, 3*clock.Second)
rr2.Record(501, 3*clock.Second)
rr2.Record(200, 3*clock.Second)
rr2.Record(200, 3*clock.Second)
require.NoError(t, rr2.Append(rr))
assert.Equal(t, map[int]int64{501: 1, 502: 1, 200: 6}, rr2.StatusCodesCounts())
assert.EqualValues(t, 1, rr2.NetworkErrorCount())
h, err := rr2.LatencyHistogram()
require.NoError(t, err)
assert.EqualValues(t, 3, h.LatencyAtQuantile(100)/clock.Second)
}
func TestConcurrentRecords(t *testing.T) {
// This test asserts a race condition which requires parallelism
runtime.GOMAXPROCS(100)
rr, err := NewRTMetrics()
require.NoError(t, err)
for code := 0; code < 100; code++ {
for numRecords := 0; numRecords < 10; numRecords++ {
go func(statusCode int) {
_ = rr.recordStatusCode(statusCode)
}(code)
}
}
}
func TestRTMetricExportReturnsNewCopy(t *testing.T) {
a := RTMetrics{
statusCodes: map[int]*RollingCounter{},
statusCodesLock: sync.RWMutex{},
histogram: &RollingHDRHistogram{},
histogramLock: sync.RWMutex{},
}
var err error
a.total, err = NewCounter(1, clock.Second)
require.NoError(t, err)
a.netErrors, err = NewCounter(1, clock.Second)
require.NoError(t, err)
a.newCounter = func() (*RollingCounter, error) {
return NewCounter(counterBuckets, counterResolution)
}
a.newHist = func() (*RollingHDRHistogram, error) {
return NewRollingHDRHistogram(histMin, histMax, histSignificantFigures, histPeriod, histBuckets)
}
b := a.Export()
a.total = nil
a.netErrors = nil
a.statusCodes = nil
a.histogram = nil
a.newCounter = nil
a.newHist = nil
assert.NotNil(t, b.total)
assert.NotNil(t, b.netErrors)
assert.NotNil(t, b.statusCodes)
assert.NotNil(t, b.histogram)
assert.NotNil(t, b.newCounter)
assert.NotNil(t, b.newHist)
// a and b should have different locks
locksSucceed := make(chan bool)
go func() {
a.statusCodesLock.Lock()
b.statusCodesLock.Lock()
a.histogramLock.Lock()
b.histogramLock.Lock()
locksSucceed <- true
}()
for {
select {
case <-locksSucceed:
return
case <-clock.After(10 * clock.Second):
t.FailNow()
}
}
}
|
