blob: c11a67c61869af0766edc6d2d36fcee6536ba152 (
plain)
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
|
<?php
/*
*
* Copyright 2017 gRPC 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.
*
*/
// Histogram class for use in performance testing and measurement
class Histogram {
private $resolution;
private $max_possible;
private $sum;
private $sum_of_squares;
private $multiplier;
private $count;
private $min_seen;
private $max_seen;
private $buckets;
private function bucket_for($value) {
return (int)(log($value) / log($this->multiplier));
}
public function __construct($resolution, $max_possible) {
$this->resolution = $resolution;
$this->max_possible = $max_possible;
$this->sum = 0;
$this->sum_of_squares = 0;
$this->multiplier = 1+$resolution;
$this->count = 0;
$this->min_seen = $max_possible;
$this->max_seen = 0;
$this->buckets = array_fill(0, $this->bucket_for($max_possible)+1, 0);
}
public function add($value) {
$this->sum += $value;
$this->sum_of_squares += $value * $value;
$this->count += 1;
if ($value < $this->min_seen) {
$this->min_seen = $value;
}
if ($value > $this->max_seen) {
$this->max_seen = $value;
}
$this->buckets[$this->bucket_for($value)] += 1;
}
public function minimum() {
return $this->min_seen;
}
public function maximum() {
return $this->max_seen;
}
public function sum() {
return $this->sum;
}
public function sum_of_squares() {
return $this->sum_of_squares;
}
public function count() {
return $this->count;
}
public function contents() {
return $this->buckets;
}
public function clean() {
$this->sum = 0;
$this->sum_of_squares = 0;
$this->count = 0;
$this->min_seen = $this->max_possible;
$this->max_seen = 0;
$this->buckets = array_fill(0, $this->bucket_for($this->max_possible)+1, 0);
}
}
|
