mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
synced 2024-12-27 00:55:17 +00:00
293 lines
7.0 KiB
Go
293 lines
7.0 KiB
Go
// Copyright 2019 The LevelDB-Go and Pebble Authors. All rights reserved. Use
|
|
// of this source code is governed by a BSD-style license that can be found in
|
|
// the LICENSE file.
|
|
|
|
package vfs
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"os"
|
|
"testing"
|
|
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
func TestSyncingFile(t *testing.T) {
|
|
const mb = 1 << 20
|
|
|
|
tmpf, err := os.CreateTemp("", "pebble-db-syncing-file-")
|
|
require.NoError(t, err)
|
|
|
|
filename := tmpf.Name()
|
|
require.NoError(t, tmpf.Close())
|
|
defer os.Remove(filename)
|
|
|
|
f, err := Default.Create(filename)
|
|
require.NoError(t, err)
|
|
|
|
tf := &mockSyncToFile{File: f, canSyncTo: true}
|
|
sf := NewSyncingFile(tf, SyncingFileOptions{BytesPerSync: 8 << 10 /* 8 KB */})
|
|
sf.(*syncingFile).fd = 1
|
|
testCases := []struct {
|
|
n int64
|
|
expectedSyncTo int64
|
|
}{
|
|
{mb, -1},
|
|
{mb, mb},
|
|
{4 << 10, mb},
|
|
{4 << 10, mb + 8<<10},
|
|
{8 << 10, mb + 16<<10},
|
|
{16 << 10, mb + 32<<10},
|
|
}
|
|
for i, c := range testCases {
|
|
_, err := sf.Write(make([]byte, c.n))
|
|
require.NoError(t, err)
|
|
|
|
syncTo := sf.(*syncingFile).syncOffset.Load()
|
|
if c.expectedSyncTo != syncTo {
|
|
t.Fatalf("%d: expected sync to %d, but found %d", i, c.expectedSyncTo, syncTo)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestSyncingFileClose(t *testing.T) {
|
|
testCases := []struct {
|
|
canSyncTo bool
|
|
expected string
|
|
}{
|
|
{true, `sync-to(1048576): test [false,<nil>]
|
|
sync-to(2097152): test [false,<nil>]
|
|
sync-to(3145728): test [false,<nil>]
|
|
pre-close: test [offset=4194304 sync-offset=3145728]
|
|
sync-data: test [<nil>]
|
|
close: test [<nil>]
|
|
`},
|
|
// When SyncTo is not being used, the last sync call ends up syncing all
|
|
// of the data causing syncingFile.Close to elide the sync.
|
|
{false, `sync-to(1048576): test [true,<nil>]
|
|
sync-to(3145728): test [true,<nil>]
|
|
pre-close: test [offset=4194304 sync-offset=4194304]
|
|
close: test [<nil>]
|
|
`},
|
|
}
|
|
for _, c := range testCases {
|
|
t.Run(fmt.Sprintf("canSyncTo=%t", c.canSyncTo), func(t *testing.T) {
|
|
tmpf, err := os.CreateTemp("", "pebble-db-syncing-file-")
|
|
require.NoError(t, err)
|
|
|
|
filename := tmpf.Name()
|
|
require.NoError(t, tmpf.Close())
|
|
defer os.Remove(filename)
|
|
|
|
f, err := Default.Create(filename)
|
|
require.NoError(t, err)
|
|
|
|
var buf bytes.Buffer
|
|
tf := &mockSyncToFile{File: f, canSyncTo: c.canSyncTo}
|
|
lf := &vfsTestFSFile{tf, "test", &buf}
|
|
s := NewSyncingFile(lf, SyncingFileOptions{BytesPerSync: 8 << 10 /* 8 KB */}).(*syncingFile)
|
|
|
|
write := func(n int64) {
|
|
t.Helper()
|
|
_, err := s.Write(make([]byte, n))
|
|
require.NoError(t, err)
|
|
}
|
|
|
|
const mb = 1 << 20
|
|
write(2 * mb)
|
|
write(mb)
|
|
write(mb)
|
|
|
|
fmt.Fprintf(&buf, "pre-close: %s [offset=%d sync-offset=%d]\n",
|
|
lf.name, s.offset.Load(), s.syncOffset.Load())
|
|
require.NoError(t, s.Close())
|
|
|
|
if s := buf.String(); c.expected != s {
|
|
t.Fatalf("expected\n%s\nbut found\n%s", c.expected, s)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
type mockSyncToFile struct {
|
|
File
|
|
canSyncTo bool
|
|
}
|
|
|
|
func (f *mockSyncToFile) SyncTo(length int64) (fullSync bool, err error) {
|
|
if !f.canSyncTo {
|
|
if err = f.File.SyncData(); err != nil {
|
|
return false, err
|
|
}
|
|
return true, nil
|
|
}
|
|
// f.canSyncTo = true
|
|
if _, err = f.File.SyncTo(length); err != nil {
|
|
return false, err
|
|
}
|
|
// NB: If the underlying file performed a full sync, lie.
|
|
return false, nil
|
|
}
|
|
|
|
func TestSyncingFileNoSyncOnClose(t *testing.T) {
|
|
testCases := []struct {
|
|
useSyncTo bool
|
|
expectBefore int64
|
|
expectAfter int64
|
|
}{
|
|
{false, 2 << 20, 3<<20 + 128},
|
|
{true, 2 << 20, 3<<20 + 128},
|
|
}
|
|
|
|
for _, c := range testCases {
|
|
t.Run(fmt.Sprintf("useSyncTo=%v", c.useSyncTo), func(t *testing.T) {
|
|
tmpf, err := os.CreateTemp("", "pebble-db-syncing-file-")
|
|
require.NoError(t, err)
|
|
|
|
filename := tmpf.Name()
|
|
require.NoError(t, tmpf.Close())
|
|
defer os.Remove(filename)
|
|
|
|
f, err := Default.Create(filename)
|
|
require.NoError(t, err)
|
|
|
|
tf := &mockSyncToFile{f, c.useSyncTo}
|
|
s := NewSyncingFile(tf, SyncingFileOptions{NoSyncOnClose: true, BytesPerSync: 8 << 10}).(*syncingFile)
|
|
|
|
write := func(n int64) {
|
|
t.Helper()
|
|
_, err := s.Write(make([]byte, n))
|
|
require.NoError(t, err)
|
|
}
|
|
|
|
const mb = 1 << 20
|
|
write(2 * mb) // Sync first 2MB
|
|
write(mb) // No sync because syncToOffset = 3M-1M = 2M
|
|
write(128) // No sync for the same reason
|
|
|
|
syncToBefore := s.syncOffset.Load()
|
|
require.NoError(t, s.Close())
|
|
syncToAfter := s.syncOffset.Load()
|
|
|
|
// If we're not able to non-blockingly sync using sync-to,
|
|
// NoSyncOnClose should elide the sync.
|
|
if !c.useSyncTo {
|
|
if syncToBefore != c.expectBefore || syncToAfter != c.expectAfter {
|
|
t.Fatalf("Expected syncTo before and after closing are %d %d but found %d %d",
|
|
c.expectBefore, c.expectAfter, syncToBefore, syncToAfter)
|
|
}
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func BenchmarkSyncWrite(b *testing.B) {
|
|
const targetSize = 16 << 20
|
|
|
|
var wsizes []int
|
|
if testing.Verbose() {
|
|
wsizes = []int{64, 512, 1 << 10, 2 << 10, 4 << 10, 8 << 10, 16 << 10, 32 << 10}
|
|
} else {
|
|
wsizes = []int{64}
|
|
}
|
|
|
|
run := func(b *testing.B, wsize int, newFile func(string) File) {
|
|
tmpf, err := os.CreateTemp("", "pebble-db-syncing-file-")
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
filename := tmpf.Name()
|
|
_ = tmpf.Close()
|
|
defer os.Remove(filename)
|
|
|
|
var f File
|
|
var size int
|
|
buf := make([]byte, wsize)
|
|
|
|
b.SetBytes(int64(len(buf)))
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
if f == nil {
|
|
b.StopTimer()
|
|
f = newFile(filename)
|
|
size = 0
|
|
b.StartTimer()
|
|
}
|
|
if _, err := f.Write(buf); err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
if err := f.Sync(); err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
size += len(buf)
|
|
if size >= targetSize {
|
|
_ = f.Close()
|
|
f = nil
|
|
}
|
|
}
|
|
b.StopTimer()
|
|
}
|
|
|
|
b.Run("no-prealloc", func(b *testing.B) {
|
|
for _, wsize := range wsizes {
|
|
b.Run(fmt.Sprintf("wsize=%d", wsize), func(b *testing.B) {
|
|
run(b, wsize, func(filename string) File {
|
|
_ = os.Remove(filename)
|
|
t, err := os.Create(filename)
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
return NewSyncingFile(wrapOSFile(t), SyncingFileOptions{PreallocateSize: 0})
|
|
})
|
|
})
|
|
}
|
|
})
|
|
|
|
b.Run("prealloc-4MB", func(b *testing.B) {
|
|
for _, wsize := range wsizes {
|
|
b.Run(fmt.Sprintf("wsize=%d", wsize), func(b *testing.B) {
|
|
run(b, wsize, func(filename string) File {
|
|
_ = os.Remove(filename)
|
|
t, err := os.Create(filename)
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
return NewSyncingFile(wrapOSFile(t), SyncingFileOptions{PreallocateSize: 4 << 20})
|
|
})
|
|
})
|
|
}
|
|
})
|
|
|
|
b.Run("reuse", func(b *testing.B) {
|
|
for _, wsize := range wsizes {
|
|
b.Run(fmt.Sprintf("wsize=%d", wsize), func(b *testing.B) {
|
|
init := true
|
|
run(b, wsize, func(filename string) File {
|
|
if init {
|
|
init = false
|
|
|
|
t, err := os.OpenFile(filename, os.O_RDWR, 0755)
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
if _, err := t.Write(make([]byte, targetSize)); err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
if err := t.Sync(); err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
t.Close()
|
|
}
|
|
|
|
t, err := os.OpenFile(filename, os.O_RDWR, 0755)
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
return NewSyncingFile(wrapOSFile(t), SyncingFileOptions{PreallocateSize: 0})
|
|
})
|
|
})
|
|
}
|
|
})
|
|
}
|