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Merge pull request #24047 from karalabe/delete-dead-sync-bloom

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core, eth, les, trie: remove the sync bloom, used by fast sync
This commit is contained in:
Péter Szilágyi 2021-12-03 13:55:17 +02:00 committed by GitHub
commit cca482b4b1
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GPG Key ID: 4AEE18F83AFDEB23
18 changed files with 49 additions and 329 deletions
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4
core/state/sync.go
View File

@ -27,7 +27,7 @@ import (
)
// NewStateSync create a new state trie download scheduler.
func NewStateSync(root common.Hash, database ethdb.KeyValueReader, bloom *trie.SyncBloom, onLeaf func(paths [][]byte, leaf []byte) error) *trie.Sync {
func NewStateSync(root common.Hash, database ethdb.KeyValueReader, onLeaf func(paths [][]byte, leaf []byte) error) *trie.Sync {
// Register the storage slot callback if the external callback is specified.
var onSlot func(paths [][]byte, hexpath []byte, leaf []byte, parent common.Hash) error
if onLeaf != nil {
@ -52,6 +52,6 @@ func NewStateSync(root common.Hash, database ethdb.KeyValueReader, bloom *trie.S
syncer.AddCodeEntry(common.BytesToHash(obj.CodeHash), hexpath, parent)
return nil
}
syncer = trie.NewSync(root, database, onAccount, bloom)
syncer = trie.NewSync(root, database, onAccount)
return syncer
}

13
core/state/sync_test.go
View File

@ -26,7 +26,6 @@ import (
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/ethdb/memorydb"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/trie"
)
@ -134,7 +133,7 @@ func checkStateConsistency(db ethdb.Database, root common.Hash) error {
// Tests that an empty state is not scheduled for syncing.
func TestEmptyStateSync(t *testing.T) {
empty := common.HexToHash("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421")
sync := NewStateSync(empty, rawdb.NewMemoryDatabase(), trie.NewSyncBloom(1, memorydb.New()), nil)
sync := NewStateSync(empty, rawdb.NewMemoryDatabase(), nil)
if nodes, paths, codes := sync.Missing(1); len(nodes) != 0 || len(paths) != 0 || len(codes) != 0 {
t.Errorf(" content requested for empty state: %v, %v, %v", nodes, paths, codes)
}
@ -171,7 +170,7 @@ func testIterativeStateSync(t *testing.T, count int, commit bool, bypath bool) {
// Create a destination state and sync with the scheduler
dstDb := rawdb.NewMemoryDatabase()
sched := NewStateSync(srcRoot, dstDb, trie.NewSyncBloom(1, dstDb), nil)
sched := NewStateSync(srcRoot, dstDb, nil)
nodes, paths, codes := sched.Missing(count)
var (
@ -250,7 +249,7 @@ func TestIterativeDelayedStateSync(t *testing.T) {
// Create a destination state and sync with the scheduler
dstDb := rawdb.NewMemoryDatabase()
sched := NewStateSync(srcRoot, dstDb, trie.NewSyncBloom(1, dstDb), nil)
sched := NewStateSync(srcRoot, dstDb, nil)
nodes, _, codes := sched.Missing(0)
queue := append(append([]common.Hash{}, nodes...), codes...)
@ -298,7 +297,7 @@ func testIterativeRandomStateSync(t *testing.T, count int) {
// Create a destination state and sync with the scheduler
dstDb := rawdb.NewMemoryDatabase()
sched := NewStateSync(srcRoot, dstDb, trie.NewSyncBloom(1, dstDb), nil)
sched := NewStateSync(srcRoot, dstDb, nil)
queue := make(map[common.Hash]struct{})
nodes, _, codes := sched.Missing(count)
@ -348,7 +347,7 @@ func TestIterativeRandomDelayedStateSync(t *testing.T) {
// Create a destination state and sync with the scheduler
dstDb := rawdb.NewMemoryDatabase()
sched := NewStateSync(srcRoot, dstDb, trie.NewSyncBloom(1, dstDb), nil)
sched := NewStateSync(srcRoot, dstDb, nil)
queue := make(map[common.Hash]struct{})
nodes, _, codes := sched.Missing(0)
@ -415,7 +414,7 @@ func TestIncompleteStateSync(t *testing.T) {
// Create a destination state and sync with the scheduler
dstDb := rawdb.NewMemoryDatabase()
sched := NewStateSync(srcRoot, dstDb, trie.NewSyncBloom(1, dstDb), nil)
sched := NewStateSync(srcRoot, dstDb, nil)
var added []common.Hash

25
eth/downloader/downloader.go
View File

@ -36,7 +36,6 @@ import (
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/trie"
)
var (
@ -101,8 +100,7 @@ type Downloader struct {
queue *queue // Scheduler for selecting the hashes to download
peers *peerSet // Set of active peers from which download can proceed
stateDB ethdb.Database // Database to state sync into (and deduplicate via)
stateBloom *trie.SyncBloom // Bloom filter for snap trie node and contract code existence checks
stateDB ethdb.Database // Database to state sync into (and deduplicate via)
// Statistics
syncStatsChainOrigin uint64 // Origin block number where syncing started at
@ -203,13 +201,12 @@ type BlockChain interface {
}
// New creates a new downloader to fetch hashes and blocks from remote peers.
func New(checkpoint uint64, stateDb ethdb.Database, stateBloom *trie.SyncBloom, mux *event.TypeMux, chain BlockChain, lightchain LightChain, dropPeer peerDropFn) *Downloader {
func New(checkpoint uint64, stateDb ethdb.Database, mux *event.TypeMux, chain BlockChain, lightchain LightChain, dropPeer peerDropFn) *Downloader {
if lightchain == nil {
lightchain = chain
}
dl := &Downloader{
stateDB: stateDb,
stateBloom: stateBloom,
mux: mux,
checkpoint: checkpoint,
queue: newQueue(blockCacheMaxItems, blockCacheInitialItems),
@ -365,12 +362,6 @@ func (d *Downloader) synchronise(id string, hash common.Hash, td *big.Int, mode
if atomic.CompareAndSwapInt32(&d.notified, 0, 1) {
log.Info("Block synchronisation started")
}
// If we are already full syncing, but have a snap-sync bloom filter laying
// around, make sure it doesn't use memory any more. This is a special case
// when the user attempts to snap sync a new empty network.
if mode == FullSync && d.stateBloom != nil {
d.stateBloom.Close()
}
// If snap sync was requested, create the snap scheduler and switch to snap
// sync mode. Long term we could drop snap sync or merge the two together,
// but until snap becomes prevalent, we should support both. TODO(karalabe).
@ -612,9 +603,6 @@ func (d *Downloader) Terminate() {
default:
close(d.quitCh)
}
if d.stateBloom != nil {
d.stateBloom.Close()
}
d.quitLock.Unlock()
// Cancel any pending download requests
@ -1599,15 +1587,6 @@ func (d *Downloader) commitPivotBlock(result *fetchResult) error {
return err
}
atomic.StoreInt32(&d.committed, 1)
// If we had a bloom filter for the state sync, deallocate it now. Note, we only
// deallocate internally, but keep the empty wrapper. This ensures that if we do
// a rollback after committing the pivot and restarting snap sync, we don't end
// up using a nil bloom. Empty bloom is fine, it just returns that it does not
// have the info we need, so reach down to the database instead.
if d.stateBloom != nil {
d.stateBloom.Close()
}
return nil
}

2
eth/downloader/downloader_test.go
View File

@ -75,7 +75,7 @@ func newTester() *downloadTester {
chain: chain,
peers: make(map[string]*downloadTesterPeer),
}
tester.downloader = New(0, db, trie.NewSyncBloom(1, db), new(event.TypeMux), tester.chain, nil, tester.dropPeer)
tester.downloader = New(0, db, new(event.TypeMux), tester.chain, nil, tester.dropPeer)
return tester
}

11
eth/handler.go
View File

@ -39,7 +39,6 @@ import (
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/trie"
)
const (
@ -106,7 +105,6 @@ type handler struct {
maxPeers int
downloader *downloader.Downloader
stateBloom *trie.SyncBloom
blockFetcher *fetcher.BlockFetcher
txFetcher *fetcher.TxFetcher
peers *peerSet
@ -176,14 +174,7 @@ func newHandler(config *handlerConfig) (*handler, error) {
// Construct the downloader (long sync) and its backing state bloom if snap
// sync is requested. The downloader is responsible for deallocating the state
// bloom when it's done.
// Note: we don't enable it if snap-sync is performed, since it's very heavy
// and the heal-portion of the snap sync is much lighter than snap. What we particularly
// want to avoid, is a 90%-finished (but restarted) snap-sync to begin
// indexing the entire trie
if atomic.LoadUint32(&h.snapSync) == 1 && atomic.LoadUint32(&h.snapSync) == 0 {
h.stateBloom = trie.NewSyncBloom(config.BloomCache, config.Database)
}
h.downloader = downloader.New(h.checkpointNumber, config.Database, h.stateBloom, h.eventMux, h.chain, nil, h.removePeer)
h.downloader = downloader.New(h.checkpointNumber, config.Database, h.eventMux, h.chain, nil, h.removePeer)
// Construct the fetcher (short sync)
validator := func(header *types.Header) error {

6
eth/handler_eth.go
View File

@ -27,16 +27,14 @@ import (
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/eth/protocols/eth"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/trie"
)
// ethHandler implements the eth.Backend interface to handle the various network
// packets that are sent as replies or broadcasts.
type ethHandler handler
func (h *ethHandler) Chain() *core.BlockChain { return h.chain }
func (h *ethHandler) StateBloom() *trie.SyncBloom { return h.stateBloom }
func (h *ethHandler) TxPool() eth.TxPool { return h.txpool }
func (h *ethHandler) Chain() *core.BlockChain { return h.chain }
func (h *ethHandler) TxPool() eth.TxPool { return h.txpool }
// RunPeer is invoked when a peer joins on the `eth` protocol.
func (h *ethHandler) RunPeer(peer *eth.Peer, hand eth.Handler) error {

2
eth/handler_eth_test.go
View File

@ -38,7 +38,6 @@ import (
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/trie"
)
// testEthHandler is a mock event handler to listen for inbound network requests
@ -50,7 +49,6 @@ type testEthHandler struct {
}
func (h *testEthHandler) Chain() *core.BlockChain { panic("no backing chain") }
func (h *testEthHandler) StateBloom() *trie.SyncBloom { panic("no backing state bloom") }
func (h *testEthHandler) TxPool() eth.TxPool { panic("no backing tx pool") }
func (h *testEthHandler) AcceptTxs() bool { return true }
func (h *testEthHandler) RunPeer(*eth.Peer, eth.Handler) error { panic("not used in tests") }

4
eth/protocols/eth/handler.go
View File

@ -29,7 +29,6 @@ import (
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/p2p/enr"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/trie"
)
const (
@ -69,9 +68,6 @@ type Backend interface {
// Chain retrieves the blockchain object to serve data.
Chain() *core.BlockChain
// StateBloom retrieves the bloom filter - if any - for state trie nodes.
StateBloom() *trie.SyncBloom
// TxPool retrieves the transaction pool object to serve data.
TxPool() TxPool

6
eth/protocols/eth/handler_test.go
View File

@ -34,7 +34,6 @@ import (
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/trie"
)
var (
@ -91,9 +90,8 @@ func (b *testBackend) close() {
b.chain.Stop()
}
func (b *testBackend) Chain() *core.BlockChain { return b.chain }
func (b *testBackend) StateBloom() *trie.SyncBloom { return nil }
func (b *testBackend) TxPool() TxPool { return b.txpool }
func (b *testBackend) Chain() *core.BlockChain { return b.chain }
func (b *testBackend) TxPool() TxPool { return b.txpool }
func (b *testBackend) RunPeer(peer *Peer, handler Handler) error {
// Normally the backend would do peer mainentance and handshakes. All that

8
eth/protocols/eth/handlers.go
View File

@ -164,13 +164,13 @@ func handleGetNodeData66(backend Backend, msg Decoder, peer *Peer) error {
if err := msg.Decode(&query); err != nil {
return fmt.Errorf("%w: message %v: %v", errDecode, msg, err)
}
response := ServiceGetNodeDataQuery(backend.Chain(), backend.StateBloom(), query.GetNodeDataPacket)
response := ServiceGetNodeDataQuery(backend.Chain(), query.GetNodeDataPacket)
return peer.ReplyNodeData(query.RequestId, response)
}
// ServiceGetNodeDataQuery assembles the response to a node data query. It is
// exposed to allow external packages to test protocol behavior.
func ServiceGetNodeDataQuery(chain *core.BlockChain, bloom *trie.SyncBloom, query GetNodeDataPacket) [][]byte {
func ServiceGetNodeDataQuery(chain *core.BlockChain, query GetNodeDataPacket) [][]byte {
// Gather state data until the fetch or network limits is reached
var (
bytes int
@ -182,10 +182,6 @@ func ServiceGetNodeDataQuery(chain *core.BlockChain, bloom *trie.SyncBloom, quer
break
}
// Retrieve the requested state entry
if bloom != nil && !bloom.Contains(hash[:]) {
// Only lookup the trie node if there's chance that we actually have it
continue
}
entry, err := chain.TrieNode(hash)
if len(entry) == 0 || err != nil {
// Read the contract code with prefix only to save unnecessary lookups.

2
eth/protocols/snap/sync.go
View File

@ -546,7 +546,7 @@ func (s *Syncer) Sync(root common.Hash, cancel chan struct{}) error {
s.lock.Lock()
s.root = root
s.healer = &healTask{
scheduler: state.NewStateSync(root, s.db, nil, s.onHealState),
scheduler: state.NewStateSync(root, s.db, s.onHealState),
trieTasks: make(map[common.Hash]trie.SyncPath),
codeTasks: make(map[common.Hash]struct{}),
}

2
les/client_handler.go
View File

@ -74,7 +74,7 @@ func newClientHandler(ulcServers []string, ulcFraction int, checkpoint *params.T
height = (checkpoint.SectionIndex+1)*params.CHTFrequency - 1
}
handler.fetcher = newLightFetcher(backend.blockchain, backend.engine, backend.peers, handler.ulc, backend.chainDb, backend.reqDist, handler.synchronise)
handler.downloader = downloader.New(height, backend.chainDb, nil, backend.eventMux, nil, backend.blockchain, handler.removePeer)
handler.downloader = downloader.New(height, backend.chainDb, backend.eventMux, nil, backend.blockchain, handler.removePeer)
handler.backend.peers.subscribe((*downloaderPeerNotify)(handler))
return handler
}

25
les/downloader/downloader.go
View File

@ -40,7 +40,6 @@ import (
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/metrics"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/trie"
)
var (
@ -97,8 +96,7 @@ type Downloader struct {
queue *queue // Scheduler for selecting the hashes to download
peers *peerSet // Set of active peers from which download can proceed
stateDB ethdb.Database // Database to state sync into (and deduplicate via)
stateBloom *trie.SyncBloom // Bloom filter for fast trie node and contract code existence checks
stateDB ethdb.Database // Database to state sync into (and deduplicate via)
// Statistics
syncStatsChainOrigin uint64 // Origin block number where syncing started at
@ -207,13 +205,12 @@ type BlockChain interface {
}
// New creates a new downloader to fetch hashes and blocks from remote peers.
func New(checkpoint uint64, stateDb ethdb.Database, stateBloom *trie.SyncBloom, mux *event.TypeMux, chain BlockChain, lightchain LightChain, dropPeer peerDropFn) *Downloader {
func New(checkpoint uint64, stateDb ethdb.Database, mux *event.TypeMux, chain BlockChain, lightchain LightChain, dropPeer peerDropFn) *Downloader {
if lightchain == nil {
lightchain = chain
}
dl := &Downloader{
stateDB: stateDb,
stateBloom: stateBloom,
mux: mux,
checkpoint: checkpoint,
queue: newQueue(blockCacheMaxItems, blockCacheInitialItems),
@ -367,12 +364,6 @@ func (d *Downloader) synchronise(id string, hash common.Hash, td *big.Int, mode
if atomic.CompareAndSwapInt32(&d.notified, 0, 1) {
log.Info("Block synchronisation started")
}
// If we are already full syncing, but have a fast-sync bloom filter laying
// around, make sure it doesn't use memory any more. This is a special case
// when the user attempts to fast sync a new empty network.
if mode == FullSync && d.stateBloom != nil {
d.stateBloom.Close()
}
// If snap sync was requested, create the snap scheduler and switch to fast
// sync mode. Long term we could drop fast sync or merge the two together,
// but until snap becomes prevalent, we should support both. TODO(karalabe).
@ -628,9 +619,6 @@ func (d *Downloader) Terminate() {
default:
close(d.quitCh)
}
if d.stateBloom != nil {
d.stateBloom.Close()
}
d.quitLock.Unlock()
// Cancel any pending download requests
@ -1930,15 +1918,6 @@ func (d *Downloader) commitPivotBlock(result *fetchResult) error {
return err
}
atomic.StoreInt32(&d.committed, 1)
// If we had a bloom filter for the state sync, deallocate it now. Note, we only
// deallocate internally, but keep the empty wrapper. This ensures that if we do
// a rollback after committing the pivot and restarting fast sync, we don't end
// up using a nil bloom. Empty bloom is fine, it just returns that it does not
// have the info we need, so reach down to the database instead.
if d.stateBloom != nil {
d.stateBloom.Close()
}
return nil
}

2
les/downloader/downloader_test.go
View File

@ -89,7 +89,7 @@ func newTester() *downloadTester {
tester.stateDb = rawdb.NewMemoryDatabase()
tester.stateDb.Put(testGenesis.Root().Bytes(), []byte{0x00})
tester.downloader = New(0, tester.stateDb, trie.NewSyncBloom(1, tester.stateDb), new(event.TypeMux), tester, nil, tester.dropPeer)
tester.downloader = New(0, tester.stateDb, new(event.TypeMux), tester, nil, tester.dropPeer)
return tester
}

2
les/downloader/statesync.go
View File

@ -297,7 +297,7 @@ func newStateSync(d *Downloader, root common.Hash) *stateSync {
return &stateSync{
d: d,
root: root,
sched: state.NewStateSync(root, d.stateDB, d.stateBloom, nil),
sched: state.NewStateSync(root, d.stateDB, nil),
keccak: sha3.NewLegacyKeccak256().(crypto.KeccakState),
trieTasks: make(map[common.Hash]*trieTask),
codeTasks: make(map[common.Hash]*codeTask),

57
trie/sync.go
View File

@ -128,11 +128,10 @@ type Sync struct {
codeReqs map[common.Hash]*request // Pending requests pertaining to a code hash
queue *prque.Prque // Priority queue with the pending requests
fetches map[int]int // Number of active fetches per trie node depth
bloom *SyncBloom // Bloom filter for fast state existence checks
}
// NewSync creates a new trie data download scheduler.
func NewSync(root common.Hash, database ethdb.KeyValueReader, callback LeafCallback, bloom *SyncBloom) *Sync {
func NewSync(root common.Hash, database ethdb.KeyValueReader, callback LeafCallback) *Sync {
ts := &Sync{
database: database,
membatch: newSyncMemBatch(),
@ -140,7 +139,6 @@ func NewSync(root common.Hash, database ethdb.KeyValueReader, callback LeafCallb
codeReqs: make(map[common.Hash]*request),
queue: prque.New(nil),
fetches: make(map[int]int),
bloom: bloom,
}
ts.AddSubTrie(root, nil, common.Hash{}, callback)
return ts
@ -155,16 +153,11 @@ func (s *Sync) AddSubTrie(root common.Hash, path []byte, parent common.Hash, cal
if s.membatch.hasNode(root) {
return
}
if s.bloom == nil || s.bloom.Contains(root[:]) {
// Bloom filter says this might be a duplicate, double check.
// If database says yes, then at least the trie node is present
// and we hold the assumption that it's NOT legacy contract code.
blob := rawdb.ReadTrieNode(s.database, root)
if len(blob) > 0 {
return
}
// False positive, bump fault meter
bloomFaultMeter.Mark(1)
// If database says this is a duplicate, then at least the trie node is
// present, and we hold the assumption that it's NOT legacy contract code.
blob := rawdb.ReadTrieNode(s.database, root)
if len(blob) > 0 {
return
}
// Assemble the new sub-trie sync request
req := &request{
@ -195,18 +188,13 @@ func (s *Sync) AddCodeEntry(hash common.Hash, path []byte, parent common.Hash) {
if s.membatch.hasCode(hash) {
return
}
if s.bloom == nil || s.bloom.Contains(hash[:]) {
// Bloom filter says this might be a duplicate, double check.
// If database says yes, the blob is present for sure.
// Note we only check the existence with new code scheme, fast
// sync is expected to run with a fresh new node. Even there
// exists the code with legacy format, fetch and store with
// new scheme anyway.
if blob := rawdb.ReadCodeWithPrefix(s.database, hash); len(blob) > 0 {
return
}
// False positive, bump fault meter
bloomFaultMeter.Mark(1)
// If database says duplicate, the blob is present for sure.
// Note we only check the existence with new code scheme, fast
// sync is expected to run with a fresh new node. Even there
// exists the code with legacy format, fetch and store with
// new scheme anyway.
if blob := rawdb.ReadCodeWithPrefix(s.database, hash); len(blob) > 0 {
return
}
// Assemble the new sub-trie sync request
req := &request{
@ -313,15 +301,9 @@ func (s *Sync) Commit(dbw ethdb.Batch) error {
// Dump the membatch into a database dbw
for key, value := range s.membatch.nodes {
rawdb.WriteTrieNode(dbw, key, value)
if s.bloom != nil {
s.bloom.Add(key[:])
}
}
for key, value := range s.membatch.codes {
rawdb.WriteCode(dbw, key, value)
if s.bloom != nil {
s.bloom.Add(key[:])
}
}
// Drop the membatch data and return
s.membatch = newSyncMemBatch()
@ -417,15 +399,10 @@ func (s *Sync) children(req *request, object node) ([]*request, error) {
if s.membatch.hasNode(hash) {
continue
}
if s.bloom == nil || s.bloom.Contains(node) {
// Bloom filter says this might be a duplicate, double check.
// If database says yes, then at least the trie node is present
// and we hold the assumption that it's NOT legacy contract code.
if blob := rawdb.ReadTrieNode(s.database, hash); len(blob) > 0 {
continue
}
// False positive, bump fault meter
bloomFaultMeter.Mark(1)
// If database says duplicate, then at least the trie node is present
// and we hold the assumption that it's NOT legacy contract code.
if blob := rawdb.ReadTrieNode(s.database, hash); len(blob) > 0 {
continue
}
// Locally unknown node, schedule for retrieval
requests = append(requests, &request{

191
trie/sync_bloom.go
View File

@ -1,191 +0,0 @@
// Copyright 2019 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package trie
import (
"encoding/binary"
"fmt"
"sync"
"sync/atomic"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/metrics"
bloomfilter "github.com/holiman/bloomfilter/v2"
)
var (
bloomAddMeter = metrics.NewRegisteredMeter("trie/bloom/add", nil)
bloomLoadMeter = metrics.NewRegisteredMeter("trie/bloom/load", nil)
bloomTestMeter = metrics.NewRegisteredMeter("trie/bloom/test", nil)
bloomMissMeter = metrics.NewRegisteredMeter("trie/bloom/miss", nil)
bloomFaultMeter = metrics.NewRegisteredMeter("trie/bloom/fault", nil)
bloomErrorGauge = metrics.NewRegisteredGauge("trie/bloom/error", nil)
)
// SyncBloom is a bloom filter used during fast sync to quickly decide if a trie
// node or contract code already exists on disk or not. It self populates from the
// provided disk database on creation in a background thread and will only start
// returning live results once that's finished.
type SyncBloom struct {
bloom *bloomfilter.Filter
inited uint32
closer sync.Once
closed uint32
pend sync.WaitGroup
closeCh chan struct{}
}
// NewSyncBloom creates a new bloom filter of the given size (in megabytes) and
// initializes it from the database. The bloom is hard coded to use 3 filters.
func NewSyncBloom(memory uint64, database ethdb.Iteratee) *SyncBloom {
// Create the bloom filter to track known trie nodes
bloom, err := bloomfilter.New(memory*1024*1024*8, 4)
if err != nil {
panic(fmt.Sprintf("failed to create bloom: %v", err))
}
log.Info("Allocated fast sync bloom", "size", common.StorageSize(memory*1024*1024))
// Assemble the fast sync bloom and init it from previous sessions
b := &SyncBloom{
bloom: bloom,
closeCh: make(chan struct{}),
}
b.pend.Add(2)
go func() {
defer b.pend.Done()
b.init(database)
}()
go func() {
defer b.pend.Done()
b.meter()
}()
return b
}
// init iterates over the database, pushing every trie hash into the bloom filter.
func (b *SyncBloom) init(database ethdb.Iteratee) {
// Iterate over the database, but restart every now and again to avoid holding
// a persistent snapshot since fast sync can push a ton of data concurrently,
// bloating the disk.
//
// Note, this is fine, because everything inserted into leveldb by fast sync is
// also pushed into the bloom directly, so we're not missing anything when the
// iterator is swapped out for a new one.
it := database.NewIterator(nil, nil)
var (
start = time.Now()
swap = time.Now()
)
for it.Next() && atomic.LoadUint32(&b.closed) == 0 {
// If the database entry is a trie node, add it to the bloom
key := it.Key()
if len(key) == common.HashLength {
b.bloom.AddHash(binary.BigEndian.Uint64(key))
bloomLoadMeter.Mark(1)
} else if ok, hash := rawdb.IsCodeKey(key); ok {
// If the database entry is a contract code, add it to the bloom
b.bloom.AddHash(binary.BigEndian.Uint64(hash))
bloomLoadMeter.Mark(1)
}
// If enough time elapsed since the last iterator swap, restart
if time.Since(swap) > 8*time.Second {
key := common.CopyBytes(it.Key())
it.Release()
it = database.NewIterator(nil, key)
log.Info("Initializing state bloom", "items", b.bloom.N(), "errorrate", b.bloom.FalsePosititveProbability(), "elapsed", common.PrettyDuration(time.Since(start)))
swap = time.Now()
}
}
it.Release()
// Mark the bloom filter inited and return
log.Info("Initialized state bloom", "items", b.bloom.N(), "errorrate", b.bloom.FalsePosititveProbability(), "elapsed", common.PrettyDuration(time.Since(start)))
atomic.StoreUint32(&b.inited, 1)
}
// meter periodically recalculates the false positive error rate of the bloom
// filter and reports it in a metric.
func (b *SyncBloom) meter() {
// check every second
tick := time.NewTicker(1 * time.Second)
defer tick.Stop()
for {
select {
case <-tick.C:
// Report the current error ration. No floats, lame, scale it up.
bloomErrorGauge.Update(int64(b.bloom.FalsePosititveProbability() * 100000))
case <-b.closeCh:
return
}
}
}
// Close terminates any background initializer still running and releases all the
// memory allocated for the bloom.
func (b *SyncBloom) Close() error {
b.closer.Do(func() {
// Ensure the initializer is stopped
atomic.StoreUint32(&b.closed, 1)
close(b.closeCh)
b.pend.Wait()
// Wipe the bloom, but mark it "uninited" just in case someone attempts an access
log.Info("Deallocated state bloom", "items", b.bloom.N(), "errorrate", b.bloom.FalsePosititveProbability())
atomic.StoreUint32(&b.inited, 0)
b.bloom = nil
})
return nil
}
// Add inserts a new trie node hash into the bloom filter.
func (b *SyncBloom) Add(hash []byte) {
if atomic.LoadUint32(&b.closed) == 1 {
return
}
b.bloom.AddHash(binary.BigEndian.Uint64(hash))
bloomAddMeter.Mark(1)
}
// Contains tests if the bloom filter contains the given hash:
// - false: the bloom definitely does not contain hash
// - true: the bloom maybe contains hash
//
// While the bloom is being initialized, any query will return true.
func (b *SyncBloom) Contains(hash []byte) bool {
bloomTestMeter.Mark(1)
if atomic.LoadUint32(&b.inited) == 0 {
// We didn't load all the trie nodes from the previous run of Geth yet. As
// such, we can't say for sure if a hash is not present for anything. Until
// the init is done, we're faking "possible presence" for everything.
return true
}
// Bloom initialized, check the real one and report any successful misses
maybe := b.bloom.ContainsHash(binary.BigEndian.Uint64(hash))
if !maybe {
bloomMissMeter.Mark(1)
}
return maybe
}

16
trie/sync_test.go
View File

@ -95,7 +95,7 @@ func TestEmptySync(t *testing.T) {
emptyB, _ := New(emptyRoot, dbB)
for i, trie := range []*Trie{emptyA, emptyB} {
sync := NewSync(trie.Hash(), memorydb.New(), nil, NewSyncBloom(1, memorydb.New()))
sync := NewSync(trie.Hash(), memorydb.New(), nil)
if nodes, paths, codes := sync.Missing(1); len(nodes) != 0 || len(paths) != 0 || len(codes) != 0 {
t.Errorf("test %d: content requested for empty trie: %v, %v, %v", i, nodes, paths, codes)
}
@ -116,7 +116,7 @@ func testIterativeSync(t *testing.T, count int, bypath bool) {
// Create a destination trie and sync with the scheduler
diskdb := memorydb.New()
triedb := NewDatabase(diskdb)
sched := NewSync(srcTrie.Hash(), diskdb, nil, NewSyncBloom(1, diskdb))
sched := NewSync(srcTrie.Hash(), diskdb, nil)
nodes, paths, codes := sched.Missing(count)
var (
@ -177,7 +177,7 @@ func TestIterativeDelayedSync(t *testing.T) {
// Create a destination trie and sync with the scheduler
diskdb := memorydb.New()
triedb := NewDatabase(diskdb)
sched := NewSync(srcTrie.Hash(), diskdb, nil, NewSyncBloom(1, diskdb))
sched := NewSync(srcTrie.Hash(), diskdb, nil)
nodes, _, codes := sched.Missing(10000)
queue := append(append([]common.Hash{}, nodes...), codes...)
@ -223,7 +223,7 @@ func testIterativeRandomSync(t *testing.T, count int) {
// Create a destination trie and sync with the scheduler
diskdb := memorydb.New()
triedb := NewDatabase(diskdb)
sched := NewSync(srcTrie.Hash(), diskdb, nil, NewSyncBloom(1, diskdb))
sched := NewSync(srcTrie.Hash(), diskdb, nil)
queue := make(map[common.Hash]struct{})
nodes, _, codes := sched.Missing(count)
@ -271,7 +271,7 @@ func TestIterativeRandomDelayedSync(t *testing.T) {
// Create a destination trie and sync with the scheduler
diskdb := memorydb.New()
triedb := NewDatabase(diskdb)
sched := NewSync(srcTrie.Hash(), diskdb, nil, NewSyncBloom(1, diskdb))
sched := NewSync(srcTrie.Hash(), diskdb, nil)
queue := make(map[common.Hash]struct{})
nodes, _, codes := sched.Missing(10000)
@ -324,7 +324,7 @@ func TestDuplicateAvoidanceSync(t *testing.T) {
// Create a destination trie and sync with the scheduler
diskdb := memorydb.New()
triedb := NewDatabase(diskdb)
sched := NewSync(srcTrie.Hash(), diskdb, nil, NewSyncBloom(1, diskdb))
sched := NewSync(srcTrie.Hash(), diskdb, nil)
nodes, _, codes := sched.Missing(0)
queue := append(append([]common.Hash{}, nodes...), codes...)
@ -371,7 +371,7 @@ func TestIncompleteSync(t *testing.T) {
// Create a destination trie and sync with the scheduler
diskdb := memorydb.New()
triedb := NewDatabase(diskdb)
sched := NewSync(srcTrie.Hash(), diskdb, nil, NewSyncBloom(1, diskdb))
sched := NewSync(srcTrie.Hash(), diskdb, nil)
var added []common.Hash
@ -431,7 +431,7 @@ func TestSyncOrdering(t *testing.T) {
// Create a destination trie and sync with the scheduler, tracking the requests
diskdb := memorydb.New()
triedb := NewDatabase(diskdb)
sched := NewSync(srcTrie.Hash(), diskdb, nil, NewSyncBloom(1, diskdb))
sched := NewSync(srcTrie.Hash(), diskdb, nil)
nodes, paths, _ := sched.Missing(1)
queue := append([]common.Hash{}, nodes...)