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// Copyright 2019 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 benchmark_test
import (
"bytes"
encbin "encoding/binary"
"fmt"
"reflect"
"testing"
"gvisor.dev/gvisor/pkg/binary"
"gvisor.dev/gvisor/pkg/sentry/usermem"
"gvisor.dev/gvisor/tools/go_marshal/analysis"
test "gvisor.dev/gvisor/tools/go_marshal/test"
)
// Marshalling using the standard encoding/binary package.
func BenchmarkEncodingBinary(b *testing.B) {
var s1, s2 test.Stat
analysis.RandomizeValue(&s1)
size := encbin.Size(&s1)
b.ResetTimer()
for n := 0; n < b.N; n++ {
buf := bytes.NewBuffer(make([]byte, size))
buf.Reset()
if err := encbin.Write(buf, usermem.ByteOrder, &s1); err != nil {
b.Error("Write:", err)
}
if err := encbin.Read(buf, usermem.ByteOrder, &s2); err != nil {
b.Error("Read:", err)
}
}
b.StopTimer()
// Sanity check, make sure the values were preserved.
if !reflect.DeepEqual(s1, s2) {
panic(fmt.Sprintf("Data corruption across marshal/unmarshal cycle:\nBefore: %+v\nAfter: %+v\n", s1, s2))
}
}
// Marshalling using the sentry's binary.Marshal.
func BenchmarkBinary(b *testing.B) {
var s1, s2 test.Stat
analysis.RandomizeValue(&s1)
size := binary.Size(s1)
b.ResetTimer()
for n := 0; n < b.N; n++ {
buf := make([]byte, 0, size)
buf = binary.Marshal(buf, usermem.ByteOrder, &s1)
binary.Unmarshal(buf, usermem.ByteOrder, &s2)
}
b.StopTimer()
// Sanity check, make sure the values were preserved.
if !reflect.DeepEqual(s1, s2) {
panic(fmt.Sprintf("Data corruption across marshal/unmarshal cycle:\nBefore: %+v\nAfter: %+v\n", s1, s2))
}
}
// Marshalling field-by-field with manually-written code.
func BenchmarkMarshalManual(b *testing.B) {
var s1, s2 test.Stat
analysis.RandomizeValue(&s1)
b.ResetTimer()
for n := 0; n < b.N; n++ {
buf := make([]byte, 0, s1.SizeBytes())
// Marshal
buf = binary.AppendUint64(buf, usermem.ByteOrder, s1.Dev)
buf = binary.AppendUint64(buf, usermem.ByteOrder, s1.Ino)
buf = binary.AppendUint64(buf, usermem.ByteOrder, s1.Nlink)
buf = binary.AppendUint32(buf, usermem.ByteOrder, s1.Mode)
buf = binary.AppendUint32(buf, usermem.ByteOrder, s1.UID)
buf = binary.AppendUint32(buf, usermem.ByteOrder, s1.GID)
buf = binary.AppendUint32(buf, usermem.ByteOrder, 0)
buf = binary.AppendUint64(buf, usermem.ByteOrder, s1.Rdev)
buf = binary.AppendUint64(buf, usermem.ByteOrder, uint64(s1.Size))
buf = binary.AppendUint64(buf, usermem.ByteOrder, uint64(s1.Blksize))
buf = binary.AppendUint64(buf, usermem.ByteOrder, uint64(s1.Blocks))
buf = binary.AppendUint64(buf, usermem.ByteOrder, uint64(s1.ATime.Sec))
buf = binary.AppendUint64(buf, usermem.ByteOrder, uint64(s1.ATime.Nsec))
buf = binary.AppendUint64(buf, usermem.ByteOrder, uint64(s1.MTime.Sec))
buf = binary.AppendUint64(buf, usermem.ByteOrder, uint64(s1.MTime.Nsec))
buf = binary.AppendUint64(buf, usermem.ByteOrder, uint64(s1.CTime.Sec))
buf = binary.AppendUint64(buf, usermem.ByteOrder, uint64(s1.CTime.Nsec))
// Unmarshal
s2.Dev = usermem.ByteOrder.Uint64(buf[0:8])
s2.Ino = usermem.ByteOrder.Uint64(buf[8:16])
s2.Nlink = usermem.ByteOrder.Uint64(buf[16:24])
s2.Mode = usermem.ByteOrder.Uint32(buf[24:28])
s2.UID = usermem.ByteOrder.Uint32(buf[28:32])
s2.GID = usermem.ByteOrder.Uint32(buf[32:36])
// Padding: buf[36:40]
s2.Rdev = usermem.ByteOrder.Uint64(buf[40:48])
s2.Size = int64(usermem.ByteOrder.Uint64(buf[48:56]))
s2.Blksize = int64(usermem.ByteOrder.Uint64(buf[56:64]))
s2.Blocks = int64(usermem.ByteOrder.Uint64(buf[64:72]))
s2.ATime.Sec = int64(usermem.ByteOrder.Uint64(buf[72:80]))
s2.ATime.Nsec = int64(usermem.ByteOrder.Uint64(buf[80:88]))
s2.MTime.Sec = int64(usermem.ByteOrder.Uint64(buf[88:96]))
s2.MTime.Nsec = int64(usermem.ByteOrder.Uint64(buf[96:104]))
s2.CTime.Sec = int64(usermem.ByteOrder.Uint64(buf[104:112]))
s2.CTime.Nsec = int64(usermem.ByteOrder.Uint64(buf[112:120]))
}
b.StopTimer()
// Sanity check, make sure the values were preserved.
if !reflect.DeepEqual(s1, s2) {
panic(fmt.Sprintf("Data corruption across marshal/unmarshal cycle:\nBefore: %+v\nAfter: %+v\n", s1, s2))
}
}
// Marshalling with the go_marshal safe API.
func BenchmarkGoMarshalSafe(b *testing.B) {
var s1, s2 test.Stat
analysis.RandomizeValue(&s1)
b.ResetTimer()
for n := 0; n < b.N; n++ {
buf := make([]byte, s1.SizeBytes())
s1.MarshalBytes(buf)
s2.UnmarshalBytes(buf)
}
b.StopTimer()
// Sanity check, make sure the values were preserved.
if !reflect.DeepEqual(s1, s2) {
panic(fmt.Sprintf("Data corruption across marshal/unmarshal cycle:\nBefore: %+v\nAfter: %+v\n", s1, s2))
}
}
// Marshalling with the go_marshal unsafe API.
func BenchmarkGoMarshalUnsafe(b *testing.B) {
var s1, s2 test.Stat
analysis.RandomizeValue(&s1)
b.ResetTimer()
for n := 0; n < b.N; n++ {
buf := make([]byte, s1.SizeBytes())
s1.MarshalUnsafe(buf)
s2.UnmarshalUnsafe(buf)
}
b.StopTimer()
// Sanity check, make sure the values were preserved.
if !reflect.DeepEqual(s1, s2) {
panic(fmt.Sprintf("Data corruption across marshal/unmarshal cycle:\nBefore: %+v\nAfter: %+v\n", s1, s2))
}
}
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