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
153
|
// Copyright 2018 The gVisor 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 tests
import (
"bytes"
"context"
"encoding/gob"
"fmt"
"testing"
"gvisor.dev/gvisor/pkg/state"
"gvisor.dev/gvisor/pkg/state/wire"
)
// buildPtrObject builds a benchmark object.
func buildPtrObject(n int) interface{} {
b := new(benchStruct)
for i := 0; i < n; i++ {
b = &benchStruct{B: b}
}
return b
}
// buildMapObject builds a benchmark object.
func buildMapObject(n int) interface{} {
b := new(benchStruct)
m := make(map[int]*benchStruct)
for i := 0; i < n; i++ {
m[i] = b
}
return &m
}
// buildSliceObject builds a benchmark object.
func buildSliceObject(n int) interface{} {
b := new(benchStruct)
s := make([]*benchStruct, 0, n)
for i := 0; i < n; i++ {
s = append(s, b)
}
return &s
}
var allObjects = map[string]struct {
New func(int) interface{}
}{
"ptr": {
New: buildPtrObject,
},
"map": {
New: buildMapObject,
},
"slice": {
New: buildSliceObject,
},
}
func buildObjects(n int, fn func(int) interface{}) (iters int, v interface{}) {
// maxSize is the maximum size of an individual object below. For an N
// larger than this, we start to return multiple objects.
const maxSize = 1024
if n <= maxSize {
return 1, fn(n)
}
iters = (n + maxSize - 1) / maxSize
return iters, fn(maxSize)
}
// gobSave is a version of save using gob (no stats available).
func gobSave(_ context.Context, w wire.Writer, v interface{}) (_ state.Stats, err error) {
enc := gob.NewEncoder(w)
err = enc.Encode(v)
return
}
// gobLoad is a version of load using gob (no stats available).
func gobLoad(_ context.Context, r wire.Reader, v interface{}) (_ state.Stats, err error) {
dec := gob.NewDecoder(r)
err = dec.Decode(v)
return
}
var allAlgos = map[string]struct {
Save func(context.Context, wire.Writer, interface{}) (state.Stats, error)
Load func(context.Context, wire.Reader, interface{}) (state.Stats, error)
MaxPtr int
}{
"state": {
Save: state.Save,
Load: state.Load,
},
"gob": {
Save: gobSave,
Load: gobLoad,
},
}
func BenchmarkEncoding(b *testing.B) {
for objName, objInfo := range allObjects {
for algoName, algoInfo := range allAlgos {
b.Run(fmt.Sprintf("%s/%s", objName, algoName), func(b *testing.B) {
b.StopTimer()
n, v := buildObjects(b.N, objInfo.New)
b.ReportAllocs()
b.StartTimer()
for i := 0; i < n; i++ {
if _, err := algoInfo.Save(context.Background(), discard{}, v); err != nil {
b.Errorf("save failed: %v", err)
}
}
b.StopTimer()
})
}
}
}
func BenchmarkDecoding(b *testing.B) {
for objName, objInfo := range allObjects {
for algoName, algoInfo := range allAlgos {
b.Run(fmt.Sprintf("%s/%s", objName, algoName), func(b *testing.B) {
b.StopTimer()
n, v := buildObjects(b.N, objInfo.New)
buf := new(bytes.Buffer)
if _, err := algoInfo.Save(context.Background(), buf, v); err != nil {
b.Errorf("save failed: %v", err)
}
b.ReportAllocs()
b.StartTimer()
var r bytes.Reader
for i := 0; i < n; i++ {
r.Reset(buf.Bytes())
if _, err := algoInfo.Load(context.Background(), &r, v); err != nil {
b.Errorf("load failed: %v", err)
}
}
b.StopTimer()
})
}
}
}
|
