608 lines
18 KiB
Go
608 lines
18 KiB
Go
// Copyright 2019 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package snapshot
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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"math/rand"
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"testing"
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"github.com/VictoriaMetrics/fastcache"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/rawdb"
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)
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// TestIteratorBasics tests some simple single-layer iteration
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func TestIteratorBasics(t *testing.T) {
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var (
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accounts = make(map[common.Hash][]byte)
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storage = make(map[common.Hash]map[common.Hash][]byte)
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)
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// Fill up a parent
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for i := 0; i < 100; i++ {
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h := randomHash()
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data := randomAccount()
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accounts[h] = data
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if rand.Intn(20) < 10 {
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accStorage := make(map[common.Hash][]byte)
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value := make([]byte, 32)
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rand.Read(value)
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accStorage[randomHash()] = value
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storage[h] = accStorage
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}
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}
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// Add some (identical) layers on top
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parent := newDiffLayer(emptyLayer(), common.Hash{}, accounts, storage)
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it := parent.AccountIterator(common.Hash{})
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verifyIterator(t, 100, it)
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}
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type testIterator struct {
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values []byte
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}
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func newTestIterator(values ...byte) *testIterator {
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return &testIterator{values}
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}
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func (ti *testIterator) Seek(common.Hash) {
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panic("implement me")
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}
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func (ti *testIterator) Next() bool {
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ti.values = ti.values[1:]
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if len(ti.values) == 0 {
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return false
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}
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return true
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}
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func (ti *testIterator) Error() error {
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panic("implement me")
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}
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func (ti *testIterator) Hash() common.Hash {
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return common.BytesToHash([]byte{ti.values[0]})
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}
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func (ti *testIterator) Account() []byte {
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panic("implement me")
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}
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func (ti *testIterator) Release() {}
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func TestFastIteratorBasics(t *testing.T) {
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type testCase struct {
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lists [][]byte
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expKeys []byte
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}
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for i, tc := range []testCase{
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{lists: [][]byte{{0, 1, 8}, {1, 2, 8}, {2, 9}, {4},
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{7, 14, 15}, {9, 13, 15, 16}},
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expKeys: []byte{0, 1, 2, 4, 7, 8, 9, 13, 14, 15, 16}},
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{lists: [][]byte{{0, 8}, {1, 2, 8}, {7, 14, 15}, {8, 9},
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{9, 10}, {10, 13, 15, 16}},
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expKeys: []byte{0, 1, 2, 7, 8, 9, 10, 13, 14, 15, 16}},
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} {
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var iterators []*weightedAccountIterator
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for i, data := range tc.lists {
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it := newTestIterator(data...)
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iterators = append(iterators, &weightedAccountIterator{it, i})
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}
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fi := &fastAccountIterator{
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iterators: iterators,
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initiated: false,
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}
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count := 0
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for fi.Next() {
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if got, exp := fi.Hash()[31], tc.expKeys[count]; exp != got {
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t.Errorf("tc %d, [%d]: got %d exp %d", i, count, got, exp)
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}
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count++
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}
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}
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}
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func verifyIterator(t *testing.T, expCount int, it AccountIterator) {
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t.Helper()
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var (
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count = 0
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last = common.Hash{}
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)
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for it.Next() {
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if hash := it.Hash(); bytes.Compare(last[:], hash[:]) >= 0 {
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t.Errorf("wrong order: %x >= %x", last, hash)
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}
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count++
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}
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if count != expCount {
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t.Errorf("iterator count mismatch: have %d, want %d", count, expCount)
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}
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if err := it.Error(); err != nil {
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t.Errorf("iterator failed: %v", err)
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}
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}
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// TestIteratorTraversal tests some simple multi-layer iteration.
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func TestIteratorTraversal(t *testing.T) {
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// Create an empty base layer and a snapshot tree out of it
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base := &diskLayer{
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diskdb: rawdb.NewMemoryDatabase(),
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root: common.HexToHash("0x01"),
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cache: fastcache.New(1024 * 500),
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}
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snaps := &Tree{
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layers: map[common.Hash]snapshot{
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base.root: base,
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},
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}
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// Stack three diff layers on top with various overlaps
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snaps.Update(common.HexToHash("0x02"), common.HexToHash("0x01"),
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randomAccountSet("0xaa", "0xee", "0xff", "0xf0"), nil)
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snaps.Update(common.HexToHash("0x03"), common.HexToHash("0x02"),
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randomAccountSet("0xbb", "0xdd", "0xf0"), nil)
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snaps.Update(common.HexToHash("0x04"), common.HexToHash("0x03"),
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randomAccountSet("0xcc", "0xf0", "0xff"), nil)
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// Verify the single and multi-layer iterators
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head := snaps.Snapshot(common.HexToHash("0x04"))
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verifyIterator(t, 3, head.(snapshot).AccountIterator(common.Hash{}))
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verifyIterator(t, 7, head.(*diffLayer).newBinaryAccountIterator())
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it, _ := snaps.AccountIterator(common.HexToHash("0x04"), common.Hash{})
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defer it.Release()
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verifyIterator(t, 7, it)
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}
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// TestIteratorTraversalValues tests some multi-layer iteration, where we
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// also expect the correct values to show up.
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func TestIteratorTraversalValues(t *testing.T) {
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// Create an empty base layer and a snapshot tree out of it
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base := &diskLayer{
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diskdb: rawdb.NewMemoryDatabase(),
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root: common.HexToHash("0x01"),
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cache: fastcache.New(1024 * 500),
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}
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snaps := &Tree{
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layers: map[common.Hash]snapshot{
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base.root: base,
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},
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}
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// Create a batch of account sets to seed subsequent layers with
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var (
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a = make(map[common.Hash][]byte)
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b = make(map[common.Hash][]byte)
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c = make(map[common.Hash][]byte)
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d = make(map[common.Hash][]byte)
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e = make(map[common.Hash][]byte)
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f = make(map[common.Hash][]byte)
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g = make(map[common.Hash][]byte)
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h = make(map[common.Hash][]byte)
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)
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for i := byte(2); i < 0xff; i++ {
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a[common.Hash{i}] = []byte(fmt.Sprintf("layer-%d, key %d", 0, i))
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if i > 20 && i%2 == 0 {
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b[common.Hash{i}] = []byte(fmt.Sprintf("layer-%d, key %d", 1, i))
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}
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if i%4 == 0 {
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c[common.Hash{i}] = []byte(fmt.Sprintf("layer-%d, key %d", 2, i))
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}
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if i%7 == 0 {
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d[common.Hash{i}] = []byte(fmt.Sprintf("layer-%d, key %d", 3, i))
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}
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if i%8 == 0 {
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e[common.Hash{i}] = []byte(fmt.Sprintf("layer-%d, key %d", 4, i))
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}
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if i > 50 || i < 85 {
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f[common.Hash{i}] = []byte(fmt.Sprintf("layer-%d, key %d", 5, i))
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}
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if i%64 == 0 {
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g[common.Hash{i}] = []byte(fmt.Sprintf("layer-%d, key %d", 6, i))
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}
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if i%128 == 0 {
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h[common.Hash{i}] = []byte(fmt.Sprintf("layer-%d, key %d", 7, i))
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}
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}
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// Assemble a stack of snapshots from the account layers
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snaps.Update(common.HexToHash("0x02"), common.HexToHash("0x01"), a, nil)
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snaps.Update(common.HexToHash("0x03"), common.HexToHash("0x02"), b, nil)
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snaps.Update(common.HexToHash("0x04"), common.HexToHash("0x03"), c, nil)
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snaps.Update(common.HexToHash("0x05"), common.HexToHash("0x04"), d, nil)
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snaps.Update(common.HexToHash("0x06"), common.HexToHash("0x05"), e, nil)
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snaps.Update(common.HexToHash("0x07"), common.HexToHash("0x06"), f, nil)
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snaps.Update(common.HexToHash("0x08"), common.HexToHash("0x07"), g, nil)
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snaps.Update(common.HexToHash("0x09"), common.HexToHash("0x08"), h, nil)
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it, _ := snaps.AccountIterator(common.HexToHash("0x09"), common.Hash{})
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defer it.Release()
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head := snaps.Snapshot(common.HexToHash("0x09"))
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for it.Next() {
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hash := it.Hash()
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want, err := head.AccountRLP(hash)
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if err != nil {
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t.Fatalf("failed to retrieve expected account: %v", err)
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}
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if have := it.Account(); !bytes.Equal(want, have) {
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t.Fatalf("hash %x: account mismatch: have %x, want %x", hash, have, want)
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}
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}
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}
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// This testcase is notorious, all layers contain the exact same 200 accounts.
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func TestIteratorLargeTraversal(t *testing.T) {
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// Create a custom account factory to recreate the same addresses
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makeAccounts := func(num int) map[common.Hash][]byte {
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accounts := make(map[common.Hash][]byte)
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for i := 0; i < num; i++ {
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h := common.Hash{}
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binary.BigEndian.PutUint64(h[:], uint64(i+1))
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accounts[h] = randomAccount()
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}
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return accounts
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}
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// Build up a large stack of snapshots
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base := &diskLayer{
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diskdb: rawdb.NewMemoryDatabase(),
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root: common.HexToHash("0x01"),
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cache: fastcache.New(1024 * 500),
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}
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snaps := &Tree{
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layers: map[common.Hash]snapshot{
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base.root: base,
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},
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}
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for i := 1; i < 128; i++ {
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snaps.Update(common.HexToHash(fmt.Sprintf("0x%02x", i+1)), common.HexToHash(fmt.Sprintf("0x%02x", i)), makeAccounts(200), nil)
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}
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// Iterate the entire stack and ensure everything is hit only once
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head := snaps.Snapshot(common.HexToHash("0x80"))
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verifyIterator(t, 200, head.(snapshot).AccountIterator(common.Hash{}))
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verifyIterator(t, 200, head.(*diffLayer).newBinaryAccountIterator())
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it, _ := snaps.AccountIterator(common.HexToHash("0x80"), common.Hash{})
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defer it.Release()
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verifyIterator(t, 200, it)
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}
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// TestIteratorFlattening tests what happens when we
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// - have a live iterator on child C (parent C1 -> C2 .. CN)
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// - flattens C2 all the way into CN
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// - continues iterating
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func TestIteratorFlattening(t *testing.T) {
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// Create an empty base layer and a snapshot tree out of it
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base := &diskLayer{
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diskdb: rawdb.NewMemoryDatabase(),
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root: common.HexToHash("0x01"),
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cache: fastcache.New(1024 * 500),
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}
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snaps := &Tree{
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layers: map[common.Hash]snapshot{
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base.root: base,
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},
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}
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// Create a stack of diffs on top
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snaps.Update(common.HexToHash("0x02"), common.HexToHash("0x01"),
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randomAccountSet("0xaa", "0xee", "0xff", "0xf0"), nil)
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snaps.Update(common.HexToHash("0x03"), common.HexToHash("0x02"),
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randomAccountSet("0xbb", "0xdd", "0xf0"), nil)
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snaps.Update(common.HexToHash("0x04"), common.HexToHash("0x03"),
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randomAccountSet("0xcc", "0xf0", "0xff"), nil)
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// Create an iterator and flatten the data from underneath it
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it, _ := snaps.AccountIterator(common.HexToHash("0x04"), common.Hash{})
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defer it.Release()
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if err := snaps.Cap(common.HexToHash("0x04"), 1); err != nil {
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t.Fatalf("failed to flatten snapshot stack: %v", err)
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}
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//verifyIterator(t, 7, it)
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}
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func TestIteratorSeek(t *testing.T) {
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// Create a snapshot stack with some initial data
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base := &diskLayer{
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diskdb: rawdb.NewMemoryDatabase(),
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root: common.HexToHash("0x01"),
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cache: fastcache.New(1024 * 500),
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}
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snaps := &Tree{
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layers: map[common.Hash]snapshot{
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base.root: base,
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},
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}
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snaps.Update(common.HexToHash("0x02"), common.HexToHash("0x01"),
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randomAccountSet("0xaa", "0xee", "0xff", "0xf0"), nil)
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snaps.Update(common.HexToHash("0x03"), common.HexToHash("0x02"),
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randomAccountSet("0xbb", "0xdd", "0xf0"), nil)
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snaps.Update(common.HexToHash("0x04"), common.HexToHash("0x03"),
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randomAccountSet("0xcc", "0xf0", "0xff"), nil)
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// Construct various iterators and ensure their tranversal is correct
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it, _ := snaps.AccountIterator(common.HexToHash("0x02"), common.HexToHash("0xdd"))
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defer it.Release()
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verifyIterator(t, 3, it) // expected: ee, f0, ff
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it, _ = snaps.AccountIterator(common.HexToHash("0x02"), common.HexToHash("0xaa"))
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defer it.Release()
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verifyIterator(t, 3, it) // expected: ee, f0, ff
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it, _ = snaps.AccountIterator(common.HexToHash("0x02"), common.HexToHash("0xff"))
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defer it.Release()
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verifyIterator(t, 0, it) // expected: nothing
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it, _ = snaps.AccountIterator(common.HexToHash("0x04"), common.HexToHash("0xbb"))
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defer it.Release()
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verifyIterator(t, 5, it) // expected: cc, dd, ee, f0, ff
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it, _ = snaps.AccountIterator(common.HexToHash("0x04"), common.HexToHash("0xef"))
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defer it.Release()
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verifyIterator(t, 2, it) // expected: f0, ff
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it, _ = snaps.AccountIterator(common.HexToHash("0x04"), common.HexToHash("0xf0"))
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defer it.Release()
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verifyIterator(t, 1, it) // expected: ff
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it, _ = snaps.AccountIterator(common.HexToHash("0x04"), common.HexToHash("0xff"))
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defer it.Release()
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verifyIterator(t, 0, it) // expected: nothing
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}
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// BenchmarkIteratorTraversal is a bit a bit notorious -- all layers contain the
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// exact same 200 accounts. That means that we need to process 2000 items, but
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// only spit out 200 values eventually.
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//
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// The value-fetching benchmark is easy on the binary iterator, since it never has to reach
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// down at any depth for retrieving the values -- all are on the toppmost layer
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//
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// BenchmarkIteratorTraversal/binary_iterator_keys-6 2239 483674 ns/op
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// BenchmarkIteratorTraversal/binary_iterator_values-6 2403 501810 ns/op
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// BenchmarkIteratorTraversal/fast_iterator_keys-6 1923 677966 ns/op
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// BenchmarkIteratorTraversal/fast_iterator_values-6 1741 649967 ns/op
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func BenchmarkIteratorTraversal(b *testing.B) {
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// Create a custom account factory to recreate the same addresses
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makeAccounts := func(num int) map[common.Hash][]byte {
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accounts := make(map[common.Hash][]byte)
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for i := 0; i < num; i++ {
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h := common.Hash{}
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binary.BigEndian.PutUint64(h[:], uint64(i+1))
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accounts[h] = randomAccount()
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}
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return accounts
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}
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// Build up a large stack of snapshots
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base := &diskLayer{
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diskdb: rawdb.NewMemoryDatabase(),
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root: common.HexToHash("0x01"),
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cache: fastcache.New(1024 * 500),
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}
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snaps := &Tree{
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layers: map[common.Hash]snapshot{
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base.root: base,
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},
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}
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for i := 1; i <= 100; i++ {
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snaps.Update(common.HexToHash(fmt.Sprintf("0x%02x", i+1)), common.HexToHash(fmt.Sprintf("0x%02x", i)), makeAccounts(200), nil)
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}
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// We call this once before the benchmark, so the creation of
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// sorted accountlists are not included in the results.
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head := snaps.Snapshot(common.HexToHash("0x65"))
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head.(*diffLayer).newBinaryAccountIterator()
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b.Run("binary iterator keys", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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got := 0
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it := head.(*diffLayer).newBinaryAccountIterator()
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for it.Next() {
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got++
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}
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if exp := 200; got != exp {
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b.Errorf("iterator len wrong, expected %d, got %d", exp, got)
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}
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}
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})
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b.Run("binary iterator values", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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got := 0
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it := head.(*diffLayer).newBinaryAccountIterator()
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for it.Next() {
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got++
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head.(*diffLayer).accountRLP(it.Hash(), 0)
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}
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if exp := 200; got != exp {
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b.Errorf("iterator len wrong, expected %d, got %d", exp, got)
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}
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}
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})
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b.Run("fast iterator keys", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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it, _ := snaps.AccountIterator(common.HexToHash("0x65"), common.Hash{})
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defer it.Release()
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got := 0
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for it.Next() {
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got++
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}
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if exp := 200; got != exp {
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b.Errorf("iterator len wrong, expected %d, got %d", exp, got)
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}
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}
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})
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b.Run("fast iterator values", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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it, _ := snaps.AccountIterator(common.HexToHash("0x65"), common.Hash{})
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defer it.Release()
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got := 0
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for it.Next() {
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got++
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it.Account()
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}
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if exp := 200; got != exp {
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b.Errorf("iterator len wrong, expected %d, got %d", exp, got)
|
|
}
|
|
}
|
|
})
|
|
}
|
|
|
|
// BenchmarkIteratorLargeBaselayer is a pretty realistic benchmark, where
|
|
// the baselayer is a lot larger than the upper layer.
|
|
//
|
|
// This is heavy on the binary iterator, which in most cases will have to
|
|
// call recursively 100 times for the majority of the values
|
|
//
|
|
// BenchmarkIteratorLargeBaselayer/binary_iterator_(keys)-6 514 1971999 ns/op
|
|
// BenchmarkIteratorLargeBaselayer/binary_iterator_(values)-6 61 18997492 ns/op
|
|
// BenchmarkIteratorLargeBaselayer/fast_iterator_(keys)-6 10000 114385 ns/op
|
|
// BenchmarkIteratorLargeBaselayer/fast_iterator_(values)-6 4047 296823 ns/op
|
|
func BenchmarkIteratorLargeBaselayer(b *testing.B) {
|
|
// Create a custom account factory to recreate the same addresses
|
|
makeAccounts := func(num int) map[common.Hash][]byte {
|
|
accounts := make(map[common.Hash][]byte)
|
|
for i := 0; i < num; i++ {
|
|
h := common.Hash{}
|
|
binary.BigEndian.PutUint64(h[:], uint64(i+1))
|
|
accounts[h] = randomAccount()
|
|
}
|
|
return accounts
|
|
}
|
|
// Build up a large stack of snapshots
|
|
base := &diskLayer{
|
|
diskdb: rawdb.NewMemoryDatabase(),
|
|
root: common.HexToHash("0x01"),
|
|
cache: fastcache.New(1024 * 500),
|
|
}
|
|
snaps := &Tree{
|
|
layers: map[common.Hash]snapshot{
|
|
base.root: base,
|
|
},
|
|
}
|
|
snaps.Update(common.HexToHash("0x02"), common.HexToHash("0x01"), makeAccounts(2000), nil)
|
|
for i := 2; i <= 100; i++ {
|
|
snaps.Update(common.HexToHash(fmt.Sprintf("0x%02x", i+1)), common.HexToHash(fmt.Sprintf("0x%02x", i)), makeAccounts(20), nil)
|
|
}
|
|
// We call this once before the benchmark, so the creation of
|
|
// sorted accountlists are not included in the results.
|
|
head := snaps.Snapshot(common.HexToHash("0x65"))
|
|
head.(*diffLayer).newBinaryAccountIterator()
|
|
|
|
b.Run("binary iterator (keys)", func(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
got := 0
|
|
it := head.(*diffLayer).newBinaryAccountIterator()
|
|
for it.Next() {
|
|
got++
|
|
}
|
|
if exp := 2000; got != exp {
|
|
b.Errorf("iterator len wrong, expected %d, got %d", exp, got)
|
|
}
|
|
}
|
|
})
|
|
b.Run("binary iterator (values)", func(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
got := 0
|
|
it := head.(*diffLayer).newBinaryAccountIterator()
|
|
for it.Next() {
|
|
got++
|
|
v := it.Hash()
|
|
head.(*diffLayer).accountRLP(v, 0)
|
|
}
|
|
if exp := 2000; got != exp {
|
|
b.Errorf("iterator len wrong, expected %d, got %d", exp, got)
|
|
}
|
|
}
|
|
})
|
|
b.Run("fast iterator (keys)", func(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
it, _ := snaps.AccountIterator(common.HexToHash("0x65"), common.Hash{})
|
|
defer it.Release()
|
|
|
|
got := 0
|
|
for it.Next() {
|
|
got++
|
|
}
|
|
if exp := 2000; got != exp {
|
|
b.Errorf("iterator len wrong, expected %d, got %d", exp, got)
|
|
}
|
|
}
|
|
})
|
|
b.Run("fast iterator (values)", func(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
it, _ := snaps.AccountIterator(common.HexToHash("0x65"), common.Hash{})
|
|
defer it.Release()
|
|
|
|
got := 0
|
|
for it.Next() {
|
|
it.Account()
|
|
got++
|
|
}
|
|
if exp := 2000; got != exp {
|
|
b.Errorf("iterator len wrong, expected %d, got %d", exp, got)
|
|
}
|
|
}
|
|
})
|
|
}
|
|
|
|
/*
|
|
func BenchmarkBinaryAccountIteration(b *testing.B) {
|
|
benchmarkAccountIteration(b, func(snap snapshot) AccountIterator {
|
|
return snap.(*diffLayer).newBinaryAccountIterator()
|
|
})
|
|
}
|
|
|
|
func BenchmarkFastAccountIteration(b *testing.B) {
|
|
benchmarkAccountIteration(b, newFastAccountIterator)
|
|
}
|
|
|
|
func benchmarkAccountIteration(b *testing.B, iterator func(snap snapshot) AccountIterator) {
|
|
// Create a diff stack and randomize the accounts across them
|
|
layers := make([]map[common.Hash][]byte, 128)
|
|
for i := 0; i < len(layers); i++ {
|
|
layers[i] = make(map[common.Hash][]byte)
|
|
}
|
|
for i := 0; i < b.N; i++ {
|
|
depth := rand.Intn(len(layers))
|
|
layers[depth][randomHash()] = randomAccount()
|
|
}
|
|
stack := snapshot(emptyLayer())
|
|
for _, layer := range layers {
|
|
stack = stack.Update(common.Hash{}, layer, nil)
|
|
}
|
|
// Reset the timers and report all the stats
|
|
it := iterator(stack)
|
|
|
|
b.ResetTimer()
|
|
b.ReportAllocs()
|
|
|
|
for it.Next() {
|
|
}
|
|
}
|
|
*/
|