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
|
// Copyright 2023 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 histogram
// GenerateBigTestHistograms generates a slice of histograms with given number of buckets each.
func GenerateBigTestHistograms(numHistograms, numBuckets int) []*Histogram {
numSpans := numBuckets / 10
bucketsPerSide := numBuckets / 2
spanLength := uint32(bucketsPerSide / numSpans)
// Given all bucket deltas are 1, sum bucketsPerSide + 1.
observationCount := uint64(bucketsPerSide) * (1 + uint64(bucketsPerSide))
var histograms []*Histogram
for i := 0; i < numHistograms; i++ {
h := &Histogram{
Count: uint64(i) + observationCount,
ZeroCount: uint64(i),
ZeroThreshold: 1e-128,
Sum: 18.4 * float64(i+1),
Schema: 2,
NegativeSpans: make([]Span, numSpans),
PositiveSpans: make([]Span, numSpans),
NegativeBuckets: make([]int64, bucketsPerSide),
PositiveBuckets: make([]int64, bucketsPerSide),
}
for j := 0; j < numSpans; j++ {
s := Span{Offset: 1, Length: spanLength}
h.NegativeSpans[j] = s
h.PositiveSpans[j] = s
}
for j := 0; j < bucketsPerSide; j++ {
h.NegativeBuckets[j] = 1
h.PositiveBuckets[j] = 1
}
histograms = append(histograms, h)
}
return histograms
}
|
