metrics: add more metrics;

mvstates: support export DAG;
dag: support travel all execution paths;

cmd/evm/internal/t8ntool/execution.go

@@ -227,7 +227,7 @@ func (pre *Prestate) Apply(vmConfig vm.Config, chainConfig *params.ChainConfig,
 			return nil, nil, nil, err
 		}
 		vmConfig.Tracer = tracer
-		statedb.SetTxContext(tx.Hash(), txIndex)
+		statedb.SetTxContext(tx.Hash(), txIndex, 0)
 
 		var (
 			txContext = core.NewEVMTxContext(msg)

consensus/parlia/parlia.go

@@ -1824,7 +1824,7 @@ func (p *Parlia) applyTransaction(
 		// move to next
 		*receivedTxs = (*receivedTxs)[1:]
 	}
-	state.SetTxContext(expectedTx.Hash(), len(*txs))
+	state.SetTxContext(expectedTx.Hash(), len(*txs), 0)
 	gasUsed, err := applyMessage(msg, state, header, p.chainConfig, chainContext)
 	if err != nil {
 		return err

core/blockchain.go

@@ -2307,7 +2307,6 @@ func (bc *BlockChain) insertChain(chain types.Blocks, setHead bool) (int, error)
 
 		blockWriteTimer.Update(time.Since(wstart) - statedb.AccountCommits - statedb.StorageCommits - statedb.SnapshotCommits - statedb.TrieDBCommits)
 		blockInsertTimer.UpdateSince(start)
-
 		// Report the import stats before returning the various results
 		stats.processed++
 		stats.usedGas += usedGas

core/chain_makers.go

@@ -119,7 +119,7 @@ func (b *BlockGen) addTx(bc *BlockChain, vmConfig vm.Config, tx *types.Transacti
 	if b.gasPool == nil {
 		b.SetCoinbase(common.Address{})
 	}
-	b.statedb.SetTxContext(tx.Hash(), len(b.txs))
+	b.statedb.SetTxContext(tx.Hash(), len(b.txs), 0)
 	receipt, err := ApplyTransaction(b.cm.config, bc, &b.header.Coinbase, b.gasPool, b.statedb, b.header, tx, &b.header.GasUsed, vmConfig, NewReceiptBloomGenerator())
 	if err != nil {
 		panic(err)

core/state/journal.go

@@ -164,7 +164,7 @@ func (ch createObjectChange) dirtied() *common.Address {
 func (ch resetObjectChange) revert(s *StateDB) {
 	s.setStateObject(ch.prev)
 	if !ch.prevdestruct {
-		delete(s.stateObjectsDestruct, ch.prev.address)
+		s.deleteStateObjectsDestruct(ch.prev.address)
 	}
 	if ch.prevAccount != nil {
 		s.accounts[ch.prev.addrHash] = ch.prevAccount

core/state/state_object.go

@@ -19,6 +19,7 @@ package state
 import (
 	"bytes"
 	"fmt"
+	"golang.org/x/exp/slices"
 	"io"
 	"sync"
 	"time"
@@ -68,6 +69,11 @@ type stateObject struct {
 	origin   *types.StateAccount // Account original data without any change applied, nil means it was not existent
 	data     types.StateAccount  // Account data with all mutations applied in the scope of block
 
+	// dirty account state
+	dirtyBalance  *uint256.Int
+	dirtyNonce    *uint64
+	dirtyCodeHash []byte
+
 	// Write caches.
 	trie Trie // storage trie, which becomes non-nil on first access
 	code Code // contract bytecode, which gets set when code is loaded
@@ -95,7 +101,7 @@ type stateObject struct {
 
 // empty returns whether the account is considered empty.
 func (s *stateObject) empty() bool {
-	return s.data.Nonce == 0 && s.data.Balance.IsZero() && bytes.Equal(s.data.CodeHash, types.EmptyCodeHash.Bytes())
+	return s.Nonce() == 0 && s.Balance().IsZero() && bytes.Equal(s.CodeHash(), types.EmptyCodeHash.Bytes())
 }
 
 // newObject creates a state object.
@@ -113,7 +119,7 @@ func newObject(db *StateDB, address common.Address, acct *types.StateAccount) *s
 		storageMap = db.GetStorage(address)
 	}
 
-	return &stateObject{
+	s := &stateObject{
 		db:                  db,
 		address:             address,
 		addrHash:            crypto.Keccak256Hash(address[:]),
@@ -125,6 +131,15 @@ func newObject(db *StateDB, address common.Address, acct *types.StateAccount) *s
 		dirtyStorage:        make(Storage),
 		created:             created,
 	}
+
+	// dirty data when create a new account
+	if acct == nil {
+		s.dirtyBalance = acct.Balance.Clone()
+		s.dirtyNonce = new(uint64)
+		*s.dirtyNonce = acct.Nonce
+		s.dirtyCodeHash = acct.CodeHash
+	}
+	return s
 }
 
 // EncodeRLP implements rlp.Encoder.
@@ -219,7 +234,7 @@ func (s *stateObject) GetCommittedState(key common.Hash) common.Hash {
 	//   1) resurrect happened, and new slot values were set -- those should
 	//      have been handles via pendingStorage above.
 	//   2) we don't have new values, and can deliver empty response back
-	if _, destructed := s.db.stateObjectsDestruct[s.address]; destructed {
+	if _, destructed := s.db.queryStateObjectsDestruct(s.address); destructed {
 		return common.Hash{}
 	}
 	// If no live objects are available, attempt to use snapshots
@@ -294,6 +309,18 @@ func (s *stateObject) finalise(prefetch bool) {
 			slotsToPrefetch = append(slotsToPrefetch, common.CopyBytes(key[:])) // Copy needed for closure
 		}
 	}
+	if s.dirtyNonce != nil {
+		s.data.Nonce = *s.dirtyNonce
+		s.dirtyNonce = nil
+	}
+	if s.dirtyBalance != nil {
+		s.data.Balance = s.dirtyBalance
+		s.dirtyBalance = nil
+	}
+	if s.dirtyCodeHash != nil {
+		s.data.CodeHash = s.dirtyCodeHash
+		s.dirtyCodeHash = nil
+	}
 	if s.db.prefetcher != nil && prefetch && len(slotsToPrefetch) > 0 && s.data.Root != types.EmptyRootHash {
 		s.db.prefetcher.prefetch(s.addrHash, s.data.Root, s.address, slotsToPrefetch)
 	}
@@ -302,6 +329,26 @@ func (s *stateObject) finalise(prefetch bool) {
 	}
 }
 
+func (s *stateObject) finaliseRWSet() {
+	for key, value := range s.dirtyStorage {
+		// three are some unclean dirtyStorage from previous reverted txs, it will skip finalise
+		// so add a new rule, if val has no change, then skip it
+		if value == s.GetCommittedState(key) {
+			continue
+		}
+		s.db.RecordWrite(types.StorageStateKey(s.address, key), value)
+	}
+	if s.dirtyNonce != nil && *s.dirtyNonce != s.data.Nonce {
+		s.db.RecordWrite(types.AccountStateKey(s.address, types.AccountNonce), *s.dirtyNonce)
+	}
+	if s.dirtyBalance != nil && !s.dirtyBalance.Eq(s.data.Balance) {
+		s.db.RecordWrite(types.AccountStateKey(s.address, types.AccountBalance), s.dirtyBalance.Clone())
+	}
+	if s.dirtyCodeHash != nil && !slices.Equal(s.dirtyCodeHash, s.data.CodeHash) {
+		s.db.RecordWrite(types.AccountStateKey(s.address, types.AccountCodeHash), s.dirtyCodeHash)
+	}
+}
+
 // updateTrie is responsible for persisting cached storage changes into the
 // object's storage trie. In case the storage trie is not yet loaded, this
 // function will load the trie automatically. If any issues arise during the
@@ -501,13 +548,13 @@ func (s *stateObject) SubBalance(amount *uint256.Int) {
 func (s *stateObject) SetBalance(amount *uint256.Int) {
 	s.db.journal.append(balanceChange{
 		account: &s.address,
-		prev:    new(uint256.Int).Set(s.data.Balance),
+		prev:    new(uint256.Int).Set(s.Balance()),
 	})
 	s.setBalance(amount)
 }
 
 func (s *stateObject) setBalance(amount *uint256.Int) {
-	s.data.Balance = amount
+	s.dirtyBalance = amount
 }
 
 func (s *stateObject) deepCopy(db *StateDB) *stateObject {
@@ -528,6 +575,17 @@ func (s *stateObject) deepCopy(db *StateDB) *stateObject {
 	obj.selfDestructed = s.selfDestructed
 	obj.dirtyCode = s.dirtyCode
 	obj.deleted = s.deleted
+
+	// dirty states
+	if s.dirtyNonce != nil {
+		obj.dirtyNonce = new(uint64)
+		*obj.dirtyNonce = *s.dirtyNonce
+	}
+	if s.dirtyBalance != nil {
+		obj.dirtyBalance = s.dirtyBalance.Clone()
+	}
+	obj.dirtyCodeHash = s.dirtyCodeHash
+
 	return obj
 }
 
@@ -585,32 +643,44 @@ func (s *stateObject) SetCode(codeHash common.Hash, code []byte) {
 
 func (s *stateObject) setCode(codeHash common.Hash, code []byte) {
 	s.code = code
-	s.data.CodeHash = codeHash[:]
+	s.dirtyCodeHash = codeHash[:]
 	s.dirtyCode = true
 }
 
 func (s *stateObject) SetNonce(nonce uint64) {
 	s.db.journal.append(nonceChange{
 		account: &s.address,
-		prev:    s.data.Nonce,
+		prev:    s.Nonce(),
 	})
 	s.setNonce(nonce)
 }
 
 func (s *stateObject) setNonce(nonce uint64) {
-	s.data.Nonce = nonce
+	s.dirtyNonce = &nonce
 }
 
 func (s *stateObject) CodeHash() []byte {
-	return s.data.CodeHash
+	if len(s.dirtyCodeHash) > 0 {
+		return s.dirtyCodeHash
+	}
+	ret := s.data.CodeHash
+	return ret
 }
 
 func (s *stateObject) Balance() *uint256.Int {
-	return s.data.Balance
+	if s.dirtyBalance != nil {
+		return s.dirtyBalance
+	}
+	ret := s.data.Balance
+	return ret
 }
 
 func (s *stateObject) Nonce() uint64 {
-	return s.data.Nonce
+	if s.dirtyNonce != nil {
+		return *s.dirtyNonce
+	}
+	ret := s.data.Nonce
+	return ret
 }
 
 func (s *stateObject) Root() common.Hash {

core/state/statedb.go

@@ -99,6 +99,7 @@ type StateDB struct {
 	stateObjectsPending       map[common.Address]struct{}            // State objects finalized but not yet written to the trie
 	stateObjectsDirty         map[common.Address]struct{}            // State objects modified in the current execution
 	stateObjectsDestruct      map[common.Address]*types.StateAccount // State objects destructed in the block along with its previous value
+	stateObjectsDestructDirty map[common.Address]*types.StateAccount
 
 	storagePool          *StoragePool // sharedPool to store L1 originStorage of stateObjects
 	writeOnSharedStorage bool         // Write to the shared origin storage of a stateObject while reading from the underlying storage layer.
@@ -117,9 +118,15 @@ type StateDB struct {
 	// The tx context and all occurred logs in the scope of transaction.
 	thash         common.Hash
 	txIndex       int
+	txIncarnation int
 	logs          map[common.Hash][]*types.Log
 	logSize       uint
 
+	// parallel EVM related
+	rwSet    *types.RWSet
+	mvStates *types.MVStates
+	es       *types.ExeStat
+
 	// Preimages occurred seen by VM in the scope of block.
 	preimages map[common.Hash][]byte
 
@@ -184,6 +191,7 @@ func New(root common.Hash, db Database, snaps *snapshot.Tree) (*StateDB, error)
 		stateObjectsPending:       make(map[common.Address]struct{}, defaultNumOfSlots),
 		stateObjectsDirty:         make(map[common.Address]struct{}, defaultNumOfSlots),
 		stateObjectsDestruct:      make(map[common.Address]*types.StateAccount, defaultNumOfSlots),
+		stateObjectsDestructDirty: make(map[common.Address]*types.StateAccount, defaultNumOfSlots),
 		logs:                      make(map[common.Hash][]*types.Log),
 		preimages:                 make(map[common.Hash][]byte),
 		journal:                   newJournal(),
@@ -425,7 +433,10 @@ func (s *StateDB) Empty(addr common.Address) bool {
 }
 
 // GetBalance retrieves the balance from the given address or 0 if object not found
-func (s *StateDB) GetBalance(addr common.Address) *uint256.Int {
+func (s *StateDB) GetBalance(addr common.Address) (ret *uint256.Int) {
+	defer func() {
+		s.RecordRead(types.AccountStateKey(addr, types.AccountBalance), ret)
+	}()
 	stateObject := s.getStateObject(addr)
 	if stateObject != nil {
 		return stateObject.Balance()
@@ -434,7 +445,10 @@ func (s *StateDB) GetBalance(addr common.Address) *uint256.Int {
 }
 
 // GetNonce retrieves the nonce from the given address or 0 if object not found
-func (s *StateDB) GetNonce(addr common.Address) uint64 {
+func (s *StateDB) GetNonce(addr common.Address) (ret uint64) {
+	defer func() {
+		s.RecordRead(types.AccountStateKey(addr, types.AccountNonce), ret)
+	}()
 	stateObject := s.getStateObject(addr)
 	if stateObject != nil {
 		return stateObject.Nonce()
@@ -482,7 +496,10 @@ func (s *StateDB) GetCodeSize(addr common.Address) int {
 	return 0
 }
 
-func (s *StateDB) GetCodeHash(addr common.Address) common.Hash {
+func (s *StateDB) GetCodeHash(addr common.Address) (ret common.Hash) {
+	defer func() {
+		s.RecordRead(types.AccountStateKey(addr, types.AccountCodeHash), ret.Bytes())
+	}()
 	stateObject := s.getStateObject(addr)
 	if stateObject != nil {
 		return common.BytesToHash(stateObject.CodeHash())
@@ -491,7 +508,10 @@ func (s *StateDB) GetCodeHash(addr common.Address) common.Hash {
 }
 
 // GetState retrieves a value from the given account's storage trie.
-func (s *StateDB) GetState(addr common.Address, hash common.Hash) common.Hash {
+func (s *StateDB) GetState(addr common.Address, hash common.Hash) (ret common.Hash) {
+	defer func() {
+		s.RecordRead(types.StorageStateKey(addr, hash), ret)
+	}()
 	stateObject := s.getStateObject(addr)
 	if stateObject != nil {
 		return stateObject.GetState(hash)
@@ -500,7 +520,10 @@ func (s *StateDB) GetState(addr common.Address, hash common.Hash) common.Hash {
 }
 
 // GetCommittedState retrieves a value from the given account's committed storage trie.
-func (s *StateDB) GetCommittedState(addr common.Address, hash common.Hash) common.Hash {
+func (s *StateDB) GetCommittedState(addr common.Address, hash common.Hash) (ret common.Hash) {
+	defer func() {
+		s.RecordRead(types.StorageStateKey(addr, hash), ret)
+	}()
 	stateObject := s.getStateObject(addr)
 	if stateObject != nil {
 		return stateObject.GetCommittedState(hash)
@@ -529,6 +552,7 @@ func (s *StateDB) HasSelfDestructed(addr common.Address) bool {
 func (s *StateDB) AddBalance(addr common.Address, amount *uint256.Int) {
 	stateObject := s.getOrNewStateObject(addr)
 	if stateObject != nil {
+		s.RecordRead(types.AccountStateKey(addr, types.AccountBalance), stateObject.Balance())
 		stateObject.AddBalance(amount)
 	}
 }
@@ -537,6 +561,7 @@ func (s *StateDB) AddBalance(addr common.Address, amount *uint256.Int) {
 func (s *StateDB) SubBalance(addr common.Address, amount *uint256.Int) {
 	stateObject := s.getOrNewStateObject(addr)
 	if stateObject != nil {
+		s.RecordRead(types.AccountStateKey(addr, types.AccountBalance), stateObject.Balance())
 		stateObject.SubBalance(amount)
 	}
 }
@@ -581,8 +606,8 @@ func (s *StateDB) SetStorage(addr common.Address, storage map[common.Hash]common
 	//
 	// TODO(rjl493456442) this function should only be supported by 'unwritable'
 	// state and all mutations made should all be discarded afterwards.
-	if _, ok := s.stateObjectsDestruct[addr]; !ok {
+	if _, ok := s.queryStateObjectsDestruct(addr); !ok {
-		s.stateObjectsDestruct[addr] = nil
+		s.tagStateObjectsDestruct(addr, nil)
 	}
 	stateObject := s.getOrNewStateObject(addr)
 	for k, v := range storage {
@@ -606,7 +631,7 @@ func (s *StateDB) SelfDestruct(addr common.Address) {
 		prevbalance: new(uint256.Int).Set(stateObject.Balance()),
 	})
 	stateObject.markSelfdestructed()
-	stateObject.data.Balance = new(uint256.Int)
+	stateObject.setBalance(new(uint256.Int))
 }
 
 func (s *StateDB) Selfdestruct6780(addr common.Address) {
@@ -712,6 +737,7 @@ func (s *StateDB) getStateObject(addr common.Address) *stateObject {
 // flag set. This is needed by the state journal to revert to the correct s-
 // destructed object instead of wiping all knowledge about the state object.
 func (s *StateDB) getDeletedStateObject(addr common.Address) *stateObject {
+	s.RecordRead(types.AccountStateKey(addr, types.AccountSelf), struct{}{})
 	// Prefer live objects if any is available
 	if obj := s.stateObjects[addr]; obj != nil {
 		return obj
@@ -798,9 +824,9 @@ func (s *StateDB) createObject(addr common.Address) (newobj, prev *stateObject)
 		// account and storage data should be cleared as well. Note, it must
 		// be done here, otherwise the destruction event of "original account"
 		// will be lost.
-		_, prevdestruct := s.stateObjectsDestruct[prev.address]
+		_, prevdestruct := s.queryStateObjectsDestruct(prev.address)
 		if !prevdestruct {
-			s.stateObjectsDestruct[prev.address] = prev.origin
+			s.tagStateObjectsDestruct(prev.address, prev.origin)
 		}
 		// There may be some cached account/storage data already since IntermediateRoot
 		// will be called for each transaction before byzantium fork which will always
@@ -841,7 +867,7 @@ func (s *StateDB) createObject(addr common.Address) (newobj, prev *stateObject)
 func (s *StateDB) CreateAccount(addr common.Address) {
 	newObj, prev := s.createObject(addr)
 	if prev != nil {
-		newObj.setBalance(prev.data.Balance)
+		newObj.setBalance(prev.Balance())
 	}
 }
 
@@ -877,6 +903,7 @@ func (s *StateDB) copyInternal(doPrefetch bool) *StateDB {
 		stateObjectsPending:       make(map[common.Address]struct{}, len(s.stateObjectsPending)),
 		stateObjectsDirty:         make(map[common.Address]struct{}, len(s.journal.dirties)),
 		stateObjectsDestruct:      make(map[common.Address]*types.StateAccount, len(s.stateObjectsDestruct)),
+		stateObjectsDestructDirty: make(map[common.Address]*types.StateAccount, len(s.stateObjectsDestructDirty)),
 		storagePool:               s.storagePool,
 		// writeOnSharedStorage: s.writeOnSharedStorage,
 		refund:    s.refund,
@@ -929,6 +956,9 @@ func (s *StateDB) copyInternal(doPrefetch bool) *StateDB {
 	for addr, value := range s.stateObjectsDestruct {
 		state.stateObjectsDestruct[addr] = value
 	}
+	for addr, value := range s.stateObjectsDestructDirty {
+		state.stateObjectsDestructDirty[addr] = value
+	}
 	// Deep copy the state changes made in the scope of block
 	// along with their original values.
 	state.accounts = copySet(s.accounts)
@@ -967,6 +997,12 @@ func (s *StateDB) copyInternal(doPrefetch bool) *StateDB {
 		// know that they need to explicitly terminate an active copy).
 		state.prefetcher = state.prefetcher.copy()
 	}
+
+	// parallel EVM related
+	if s.mvStates != nil {
+		state.mvStates = s.mvStates
+	}
+
 	return state
 }
 
@@ -1015,6 +1051,11 @@ func (s *StateDB) WaitPipeVerification() error {
 // into the tries just yet. Only IntermediateRoot or Commit will do that.
 func (s *StateDB) Finalise(deleteEmptyObjects bool) {
 	addressesToPrefetch := make([][]byte, 0, len(s.journal.dirties))
+	// finalise stateObjectsDestruct
+	for addr, acc := range s.stateObjectsDestructDirty {
+		s.stateObjectsDestruct[addr] = acc
+	}
+	s.stateObjectsDestructDirty = make(map[common.Address]*types.StateAccount)
 	for addr := range s.journal.dirties {
 		obj, exist := s.stateObjects[addr]
 		if !exist {
@@ -1249,9 +1290,10 @@ func (s *StateDB) StateIntermediateRoot() common.Hash {
 // SetTxContext sets the current transaction hash and index which are
 // used when the EVM emits new state logs. It should be invoked before
 // transaction execution.
-func (s *StateDB) SetTxContext(thash common.Hash, ti int) {
+func (s *StateDB) SetTxContext(thash common.Hash, txIndex int, incarnation int) {
 	s.thash = thash
-	s.txIndex = ti
+	s.txIndex = txIndex
+	s.txIncarnation = incarnation
 	s.accessList = nil // can't delete this line now, because StateDB.Prepare is not called before processsing a system transaction
 }
 
@@ -1900,6 +1942,131 @@ func (s *StateDB) GetSnap() snapshot.Snapshot {
 	return s.snap
 }
 
+func (s *StateDB) BeforeTxTransition() {
+	log.Debug("BeforeTxTransition", "mvStates", s.mvStates == nil, "rwSet", s.rwSet == nil)
+	if s.mvStates == nil {
+		return
+	}
+	s.rwSet = types.NewRWSet(types.StateVersion{
+		TxIndex:       s.txIndex,
+		TxIncarnation: s.txIncarnation,
+	})
+}
+
+func (s *StateDB) BeginTxStat(index int) {
+	if s.mvStates == nil {
+		return
+	}
+	s.es = types.NewExeStat(index).Begin()
+}
+
+func (s *StateDB) StopTxStat(usedGas uint64) {
+	if s.mvStates == nil {
+		return
+	}
+	// record stat first
+	if s.es != nil {
+		s.es.Done().WithGas(usedGas).WithRead(len(s.rwSet.ReadSet()))
+	}
+}
+
+func (s *StateDB) RecordRead(key types.RWKey, val interface{}) {
+	if s.mvStates == nil || s.rwSet == nil {
+		return
+	}
+	// TODO: read from MVStates, record with ver
+	s.rwSet.RecordRead(key, types.StateVersion{
+		TxIndex: -1,
+	}, val)
+}
+
+func (s *StateDB) RecordWrite(key types.RWKey, val interface{}) {
+	if s.mvStates == nil || s.rwSet == nil {
+		return
+	}
+	s.rwSet.RecordWrite(key, val)
+}
+
+func (s *StateDB) ResetMVStates(txCount int) {
+	log.Debug("ResetMVStates", "mvStates", s.mvStates == nil, "rwSet", s.rwSet == nil)
+	s.mvStates = types.NewMVStates(txCount)
+	s.rwSet = nil
+}
+
+func (s *StateDB) FinaliseRWSet() error {
+	log.Debug("FinaliseRWSet", "mvStates", s.mvStates == nil, "rwSet", s.rwSet == nil)
+	if s.mvStates == nil || s.rwSet == nil {
+		return nil
+	}
+	// finalise stateObjectsDestruct
+	for addr, acc := range s.stateObjectsDestructDirty {
+		s.stateObjectsDestruct[addr] = acc
+		s.RecordWrite(types.AccountStateKey(addr, types.AccountSuicide), struct{}{})
+	}
+	for addr := range s.journal.dirties {
+		obj, exist := s.stateObjects[addr]
+		if !exist {
+			continue
+		}
+		if obj.selfDestructed || obj.empty() {
+			// We need to maintain account deletions explicitly (will remain
+			// set indefinitely). Note only the first occurred self-destruct
+			// event is tracked.
+			if _, ok := s.stateObjectsDestruct[obj.address]; !ok {
+				log.Debug("FinaliseRWSet find Destruct", "tx", s.txIndex, "addr", addr, "selfDestructed", obj.selfDestructed)
+				s.RecordWrite(types.AccountStateKey(addr, types.AccountSuicide), struct{}{})
+			}
+		} else {
+			// finalise account & storages
+			obj.finaliseRWSet()
+		}
+	}
+	ver := types.StateVersion{
+		TxIndex:       s.txIndex,
+		TxIncarnation: s.txIncarnation,
+	}
+	if ver != s.rwSet.Version() {
+		return errors.New("you finalize a wrong ver of RWSet")
+	}
+
+	log.Debug("FinaliseRWSet", "rwset", s.rwSet)
+	return s.mvStates.FulfillRWSet(s.rwSet, s.es)
+}
+
+func (s *StateDB) queryStateObjectsDestruct(addr common.Address) (*types.StateAccount, bool) {
+	if acc, ok := s.stateObjectsDestructDirty[addr]; ok {
+		return acc, ok
+	}
+	acc, ok := s.stateObjectsDestruct[addr]
+	return acc, ok
+}
+
+func (s *StateDB) tagStateObjectsDestruct(addr common.Address, acc *types.StateAccount) {
+	s.stateObjectsDestructDirty[addr] = acc
+}
+
+func (s *StateDB) deleteStateObjectsDestruct(addr common.Address) {
+	delete(s.stateObjectsDestructDirty, addr)
+}
+
+func (s *StateDB) MVStates2TxDAG() (*types.TxDAG, []*types.ExeStat) {
+	if s.mvStates == nil {
+		return nil, nil
+	}
+
+	return s.mvStates.ResolveTxDAG(), s.mvStates.Stats()
+}
+
+func (s *StateDB) RecordSystemTxRWSet(index int) {
+	if s.mvStates == nil {
+		return
+	}
+	s.mvStates.FulfillRWSet(types.NewRWSet(types.StateVersion{
+		TxIndex:       index,
+		TxIncarnation: 0,
+	}).WithSerialFlag(), types.NewExeStat(index).WithSerialFlag())
+}
+
 // copySet returns a deep-copied set.
 func copySet[k comparable](set map[k][]byte) map[k][]byte {
 	copied := make(map[k][]byte, len(set))

core/state_prefetcher.go

@@ -76,7 +76,7 @@ func (p *statePrefetcher) Prefetch(block *types.Block, statedb *state.StateDB, c
 					if err != nil {
 						return // Also invalid block, bail out
 					}
-					newStatedb.SetTxContext(tx.Hash(), txIndex)
+					newStatedb.SetTxContext(tx.Hash(), txIndex, 0)
 					precacheTransaction(msg, p.config, gaspool, newStatedb, header, evm)
 
 				case <-interruptCh:
@@ -125,7 +125,7 @@ func (p *statePrefetcher) PrefetchMining(txs TransactionsByPriceAndNonce, header
 						return // Also invalid block, bail out
 					}
 					idx++
-					newStatedb.SetTxContext(tx.Hash(), idx)
+					newStatedb.SetTxContext(tx.Hash(), idx, 0)
 					precacheTransaction(msg, p.config, gaspool, newStatedb, header, evm)
 					gaspool = new(GasPool).AddGas(gasLimit)
 				case <-stopCh:

core/state_processor.go

@@ -19,8 +19,6 @@ package core
 import (
 	"errors"
 	"fmt"
-	"math/big"
-
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/consensus"
 	"github.com/ethereum/go-ethereum/consensus/misc"
@@ -29,7 +27,11 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/metrics"
 	"github.com/ethereum/go-ethereum/params"
+	"math/big"
+	"time"
 )
 
 // StateProcessor is a basic Processor, which takes care of transitioning
@@ -51,6 +53,12 @@ func NewStateProcessor(config *params.ChainConfig, bc *BlockChain, engine consen
 	}
 }
 
+var (
+	dagExecutionTimer   = metrics.NewRegisteredTimer("dag/executiontime", nil)
+	dagAccountReadTimer = metrics.NewRegisteredTimer("dag/accountreadtime", nil)
+	dagStorageReadTimer = metrics.NewRegisteredTimer("dag/storagereadtime", nil)
+)
+
 // Process processes the state changes according to the Ethereum rules by running
 // the transaction messages using the statedb and applying any rewards to both
 // the processor (coinbase) and any included uncles.
@@ -59,6 +67,7 @@ func NewStateProcessor(config *params.ChainConfig, bc *BlockChain, engine consen
 // returns the amount of gas that was used in the process. If any of the
 // transactions failed to execute due to insufficient gas it will return an error.
 func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg vm.Config) (*state.StateDB, types.Receipts, []*types.Log, uint64, error) {
+
 	var (
 		usedGas     = new(uint64)
 		header      = block.Header()
@@ -99,16 +108,20 @@ func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg
 	// initialise bloom processors
 	bloomProcessors := NewAsyncReceiptBloomGenerator(txNum)
 	statedb.MarkFullProcessed()
+	statedb.ResetMVStates(len(block.Transactions()))
+	log.Debug("ResetMVStates", "block", block.NumberU64(), "txs", len(block.Transactions()))
 
 	// usually do have two tx, one for validator set contract, another for system reward contract.
 	systemTxs := make([]*types.Transaction, 0, 2)
-
+	start := time.Now()
 	for i, tx := range block.Transactions() {
+		statedb.BeginTxStat(i)
 		if isPoSA {
 			if isSystemTx, err := posa.IsSystemTransaction(tx, block.Header()); err != nil {
 				bloomProcessors.Close()
 				return statedb, nil, nil, 0, err
 			} else if isSystemTx {
+				statedb.RecordSystemTxRWSet(i)
 				systemTxs = append(systemTxs, tx)
 				continue
 			}
@@ -125,7 +138,7 @@ func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg
 			bloomProcessors.Close()
 			return statedb, nil, nil, 0, err
 		}
-		statedb.SetTxContext(tx.Hash(), i)
+		statedb.SetTxContext(tx.Hash(), i, 0)
 
 		receipt, err := applyTransaction(msg, p.config, gp, statedb, blockNumber, blockHash, tx, usedGas, vmenv, bloomProcessors)
 		if err != nil {
@@ -134,7 +147,10 @@ func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg
 		}
 		commonTxs = append(commonTxs, tx)
 		receipts = append(receipts, receipt)
+		statedb.StopTxStat(receipt.GasUsed)
 	}
+	eTime := time.Since(start)
+	// this bloomProcessors may take ~20ms
 	bloomProcessors.Close()
 
 	// Fail if Shanghai not enabled and len(withdrawals) is non-zero.
@@ -143,7 +159,20 @@ func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg
 		return nil, nil, nil, 0, errors.New("withdrawals before shanghai")
 	}
 
+	// TODO: temporary add time metrics
+	dag, exrStats := statedb.MVStates2TxDAG()
+	//log.Info("MVStates2TxDAG", "block", block.NumberU64(), "tx", len(block.Transactions()), "dag", dag)
+	fmt.Printf("MVStates2TxDAG, block: %v|%v, tx: %v, time: %v\n", block.NumberU64(), block.Hash(), len(block.Transactions()), time.Now().Format(time.DateTime))
+	fmt.Print(types.EvaluateTxDAGPerformance(dag, exrStats))
+	fmt.Printf("block: %v, execution: %.2fms, accountRead: %.2fms, storageRead: %.2fms\n",
+		block.NumberU64(), float64(eTime.Microseconds())/1000, float64((statedb.SnapshotAccountReads+statedb.AccountReads).Microseconds())/1000,
+		float64((statedb.SnapshotStorageReads+statedb.StorageReads).Microseconds())/1000)
+
+	dagExecutionTimer.Update(eTime)
+	dagAccountReadTimer.Update(statedb.SnapshotAccountReads + statedb.AccountReads)
+	dagStorageReadTimer.Update(statedb.SnapshotStorageReads + statedb.StorageReads)
 	// Finalize the block, applying any consensus engine specific extras (e.g. block rewards)
+	// TODO: system txs must execute at last
 	err := p.engine.Finalize(p.bc, header, statedb, &commonTxs, block.Uncles(), withdrawals, &receipts, &systemTxs, usedGas)
 	if err != nil {
 		return statedb, receipts, allLogs, *usedGas, err

core/state_transition.go

@@ -367,6 +367,8 @@ func (st *StateTransition) preCheck() error {
 // However if any consensus issue encountered, return the error directly with
 // nil evm execution result.
 func (st *StateTransition) TransitionDb() (*ExecutionResult, error) {
+	// start record rw set in here
+	st.state.BeforeTxTransition()
 	// First check this message satisfies all consensus rules before
 	// applying the message. The rules include these clauses
 	//
@@ -446,6 +448,10 @@ func (st *StateTransition) TransitionDb() (*ExecutionResult, error) {
 		ret, st.gasRemaining, vmerr = st.evm.Call(sender, st.to(), msg.Data, st.gasRemaining, value)
 	}
 
+	// stop record rw set in here
+	if err := st.state.FinaliseRWSet(); err != nil {
+		return nil, err
+	}
 	var gasRefund uint64
 	if !rules.IsLondon {
 		// Before EIP-3529: refunds were capped to gasUsed / 2

core/types/block.go

@@ -204,6 +204,8 @@ type Body struct {
 	Transactions []*Transaction
 	Uncles       []*Header
 	Withdrawals  []*Withdrawal `rlp:"optional"`
+	// TODO: add TxDAG in block body
+	//TxDAG        *TxDAG        `rlp:"optional"`
 }
 
 // Block represents an Ethereum block.

core/types/dag.go

@@ -0,0 +1,698 @@
+package types
+
+import (
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/metrics"
+	"github.com/holiman/uint256"
+	"golang.org/x/exp/slices"
+	"sort"
+	"strings"
+	"sync"
+	"time"
+)
+
+// TxDep store the current tx dependency relation with other txs
+type TxDep struct {
+	// It describes the Relation with below txs
+	// 0: this tx depends on below txs
+	// 1: this transaction does not depend on below txs, all other previous txs depend on
+	Relation  uint8
+	TxIndexes []int
+}
+
+func (d *TxDep) AppendDep(i int) {
+	d.TxIndexes = append(d.TxIndexes, i)
+}
+
+func (d *TxDep) Exist(i int) bool {
+	for _, index := range d.TxIndexes {
+		if index == i {
+			return true
+		}
+	}
+
+	return false
+}
+
+// TxDAG indicate how to use the dependency of txs
+type TxDAG struct {
+	// The TxDAG type
+	// 0: delay the distribution of GasFee, it will ignore all gas fee distribution when tx execute
+	// 1: timely distribution of transaction fees, it will keep partial serial execution when tx cannot delay the distribution
+	Type uint8
+	// Tx Dependency List, the list index is equal to TxIndex
+	TxDeps []TxDep
+	// It indicates the scheduling priority of the transactions
+	SchedulePriority []int
+}
+
+func NewTxDAG(txLen int) *TxDAG {
+	return &TxDAG{
+		Type:   0,
+		TxDeps: make([]TxDep, txLen),
+	}
+}
+
+func (d *TxDAG) String() string {
+	builder := strings.Builder{}
+	exePaths := d.travelExecutionPaths()
+	for _, path := range exePaths {
+		builder.WriteString(fmt.Sprintf("%v\n", path))
+	}
+	return builder.String()
+}
+
+func (d *TxDAG) travelExecutionPaths() [][]int {
+	// regenerate TxDAG
+	nd := NewTxDAG(len(d.TxDeps))
+	for i, txDep := range d.TxDeps {
+		nd.TxDeps[i].Relation = 0
+		if txDep.Relation == 0 {
+			nd.TxDeps[i] = txDep
+			continue
+		}
+
+		// recover to relation 0
+		for j := 0; j < i; j++ {
+			if !txDep.Exist(j) {
+				nd.TxDeps[i].AppendDep(j)
+			}
+		}
+	}
+	exePaths := make([][]int, 0)
+
+	// travel tx deps with BFS
+	for i := 0; i < len(nd.TxDeps); i++ {
+		exePaths = append(exePaths, travelTargetPath(nd.TxDeps, i))
+	}
+	return exePaths
+}
+
+var (
+	longestTimeTimer = metrics.NewRegisteredTimer("dag/longesttime", nil)
+	longestGasTimer  = metrics.NewRegisteredTimer("dag/longestgas", nil)
+	serialTimeTimer  = metrics.NewRegisteredTimer("dag/serialtime", nil)
+	totalTxMeter     = metrics.NewRegisteredMeter("dag/txcnt", nil)
+	totalNoDepMeter  = metrics.NewRegisteredMeter("dag/nodepcntcnt", nil)
+	total2DepMeter   = metrics.NewRegisteredMeter("dag/2depcntcnt", nil)
+	total4DepMeter   = metrics.NewRegisteredMeter("dag/4depcntcnt", nil)
+	total8DepMeter   = metrics.NewRegisteredMeter("dag/8depcntcnt", nil)
+	total16DepMeter  = metrics.NewRegisteredMeter("dag/16depcntcnt", nil)
+	total32DepMeter  = metrics.NewRegisteredMeter("dag/32depcntcnt", nil)
+)
+
+func EvaluateTxDAGPerformance(dag *TxDAG, stats []*ExeStat) string {
+	if len(stats) != len(dag.TxDeps) || len(dag.TxDeps) == 0 {
+		return ""
+	}
+	sb := strings.Builder{}
+	sb.WriteString("TxDAG:\n")
+	for i, dep := range dag.TxDeps {
+		if stats[i].mustSerialFlag {
+			continue
+		}
+		sb.WriteString(fmt.Sprintf("%v: %v\n", i, dep.TxIndexes))
+	}
+	sb.WriteString("Parallel Execution Path:\n")
+	paths := dag.travelExecutionPaths()
+	// Attention: this is based on best schedule, it will reduce a lot by executing previous txs in parallel
+	// It assumes that there is no parallel thread limit
+	var (
+		maxGasIndex     int
+		maxGas          uint64
+		maxTimeIndex    int
+		maxTime         time.Duration
+		txTimes         = make([]time.Duration, len(dag.TxDeps))
+		txGases         = make([]uint64, len(dag.TxDeps))
+		txReads         = make([]int, len(dag.TxDeps))
+		noDepdencyCount int
+	)
+
+	totalTxMeter.Mark(int64(len(dag.TxDeps)))
+	for i, path := range paths {
+		if stats[i].mustSerialFlag {
+			continue
+		}
+		if len(path) <= 1 {
+			noDepdencyCount++
+			totalNoDepMeter.Mark(1)
+		}
+		if len(path) <= 3 {
+			total2DepMeter.Mark(1)
+		}
+		if len(path) <= 5 {
+			total4DepMeter.Mark(1)
+		}
+		if len(path) <= 9 {
+			total8DepMeter.Mark(1)
+		}
+		if len(path) <= 17 {
+			total16DepMeter.Mark(1)
+		}
+		if len(path) <= 33 {
+			total32DepMeter.Mark(1)
+		}
+
+		// find the biggest cost time from dependency txs
+		for j := 0; j < len(path)-1; j++ {
+			prev := path[j]
+			if txTimes[prev] > txTimes[i] {
+				txTimes[i] = txTimes[prev]
+			}
+			if txGases[prev] > txGases[i] {
+				txGases[i] = txGases[prev]
+			}
+			if txReads[prev] > txReads[i] {
+				txReads[i] = txReads[prev]
+			}
+		}
+		txTimes[i] += stats[i].costTime
+		txGases[i] += stats[i].usedGas
+		txReads[i] += stats[i].readCount
+
+		//sb.WriteString(fmt.Sprintf("Tx%v, %.2fms|%vgas|%vreads\npath: %v\n", i, float64(txTimes[i].Microseconds())/1000, txGases[i], txReads[i], path))
+		sb.WriteString(fmt.Sprintf("%v: %v\n", i, path))
+		// try to find max gas
+		if txGases[i] > maxGas {
+			maxGas = txGases[i]
+			maxGasIndex = i
+		}
+		if txTimes[i] > maxTime {
+			maxTime = txTimes[i]
+			maxTimeIndex = i
+		}
+	}
+
+	sb.WriteString(fmt.Sprintf("LargestGasPath: %.2fms|%vgas|%vreads\npath: %v\n", float64(txTimes[maxGasIndex].Microseconds())/1000, txGases[maxGasIndex], txReads[maxGasIndex], paths[maxGasIndex]))
+	sb.WriteString(fmt.Sprintf("LongestTimePath: %.2fms|%vgas|%vreads\npath: %v\n", float64(txTimes[maxTimeIndex].Microseconds())/1000, txGases[maxTimeIndex], txReads[maxTimeIndex], paths[maxTimeIndex]))
+	longestTimeTimer.Update(txTimes[maxTimeIndex])
+	longestGasTimer.Update(txTimes[maxGasIndex])
+	// serial path
+	var (
+		sTime time.Duration
+		sGas  uint64
+		sRead int
+		sPath []int
+	)
+	for i, stat := range stats {
+		if stat.mustSerialFlag {
+			continue
+		}
+		sPath = append(sPath, i)
+		sTime += stat.costTime
+		sGas += stat.usedGas
+		sRead += stat.readCount
+	}
+	if sTime == 0 {
+		return ""
+	}
+	sb.WriteString(fmt.Sprintf("SerialPath: %.2fms|%vgas|%vreads\npath: %v\n", float64(sTime.Microseconds())/1000, sGas, sRead, sPath))
+	maxParaTime := txTimes[maxTimeIndex]
+	sb.WriteString(fmt.Sprintf("Estimated saving: %.2fms, %.2f%%, %.2fX, noDepCnt: %v|%.2f%%\n",
+		float64((sTime-maxParaTime).Microseconds())/1000, float64(sTime-maxParaTime)/float64(sTime)*100,
+		float64(sTime)/float64(maxParaTime), noDepdencyCount, float64(noDepdencyCount)/float64(len(dag.TxDeps))*100))
+	serialTimeTimer.Update(sTime)
+	return sb.String()
+}
+
+func travelTargetPath(deps []TxDep, from int) []int {
+	q := make([]int, 0, len(deps))
+	path := make([]int, 0, len(deps))
+
+	q = append(q, from)
+	path = append(path, from)
+	for len(q) > 0 {
+		t := make([]int, 0, len(deps))
+		for _, i := range q {
+			for _, dep := range deps[i].TxIndexes {
+				if !slices.Contains(path, dep) {
+					path = append(path, dep)
+					t = append(t, dep)
+				}
+			}
+		}
+		q = t
+	}
+	sort.Ints(path)
+	return path
+}
+
+type ValidatorExtraItem struct {
+	ValidatorAddress common.Address
+	VoteAddress      BLSPublicKey
+}
+
+type HeaderCustomExtra struct {
+	ValidatorSet ValidatorExtraItem
+	TxDAG        TxDAG
+}
+
+// StateVersion record specific TxIndex & TxIncarnation
+// if TxIndex equals to -1, it means the state read from DB.
+type StateVersion struct {
+	TxIndex       int
+	TxIncarnation int
+}
+
+// ReadRecord keep read value & its version
+type ReadRecord struct {
+	StateVersion
+	Val interface{}
+}
+
+// WriteRecord keep latest state value & change count
+type WriteRecord struct {
+	Val interface{}
+}
+
+// RWSet record all read & write set in txs
+// Attention: this is not a concurrent safety structure
+type RWSet struct {
+	ver      StateVersion
+	readSet  map[RWKey]*ReadRecord
+	writeSet map[RWKey]*WriteRecord
+
+	// some flags
+	mustSerial bool
+}
+
+func NewRWSet(ver StateVersion) *RWSet {
+	return &RWSet{
+		ver:      ver,
+		readSet:  make(map[RWKey]*ReadRecord),
+		writeSet: make(map[RWKey]*WriteRecord),
+	}
+}
+
+func (s *RWSet) RecordRead(key RWKey, ver StateVersion, val interface{}) {
+	// only record the first read version
+	if _, exist := s.readSet[key]; exist {
+		return
+	}
+	s.readSet[key] = &ReadRecord{
+		StateVersion: ver,
+		Val:          val,
+	}
+}
+
+func (s *RWSet) RecordWrite(key RWKey, val interface{}) {
+	wr, exist := s.writeSet[key]
+	if !exist {
+		s.writeSet[key] = &WriteRecord{
+			Val: val,
+		}
+		return
+	}
+	wr.Val = val
+}
+
+func (s *RWSet) Version() StateVersion {
+	return s.ver
+}
+
+func (s *RWSet) ReadSet() map[RWKey]*ReadRecord {
+	return s.readSet
+}
+
+func (s *RWSet) WriteSet() map[RWKey]*WriteRecord {
+	return s.writeSet
+}
+
+func (s *RWSet) WithSerialFlag() *RWSet {
+	s.mustSerial = true
+	return s
+}
+
+func (s *RWSet) String() string {
+	builder := strings.Builder{}
+	builder.WriteString(fmt.Sprintf("tx: %v, inc: %v\nreadSet: [", s.ver.TxIndex, s.ver.TxIncarnation))
+	i := 0
+	for key, _ := range s.readSet {
+		if i > 0 {
+			builder.WriteString(fmt.Sprintf(", %v", key.String()))
+			continue
+		}
+		builder.WriteString(fmt.Sprintf("%v", key.String()))
+		i++
+	}
+	builder.WriteString("]\nwriteSet: [")
+	i = 0
+	for key, _ := range s.writeSet {
+		if i > 0 {
+			builder.WriteString(fmt.Sprintf(", %v", key.String()))
+			continue
+		}
+		builder.WriteString(fmt.Sprintf("%v", key.String()))
+		i++
+	}
+	builder.WriteString("]\n")
+	return builder.String()
+}
+
+const (
+	AccountStatePrefix = 'a'
+	StorageStatePrefix = 's'
+)
+
+type RWKey [1 + common.AddressLength + common.HashLength]byte
+
+type AccountState byte
+
+const (
+	AccountSelf AccountState = iota
+	AccountNonce
+	AccountBalance
+	AccountCodeHash
+	AccountSuicide
+)
+
+func AccountStateKey(account common.Address, state AccountState) RWKey {
+	var key RWKey
+	key[0] = AccountStatePrefix
+	copy(key[1:], account.Bytes())
+	key[1+common.AddressLength] = byte(state)
+	return key
+}
+
+func StorageStateKey(account common.Address, state common.Hash) RWKey {
+	var key RWKey
+	key[0] = StorageStatePrefix
+	copy(key[1:], account.Bytes())
+	copy(key[1+common.AddressLength:], state.Bytes())
+	return key
+}
+
+func (key *RWKey) IsAccountState() (bool, AccountState) {
+	return AccountStatePrefix == key[0], AccountState(key[1+common.AddressLength])
+}
+
+func (key *RWKey) IsAccountSelf() bool {
+	ok, s := key.IsAccountState()
+	if !ok {
+		return false
+	}
+	return s == AccountSelf
+}
+
+func (key *RWKey) IsAccountSuicide() bool {
+	ok, s := key.IsAccountState()
+	if !ok {
+		return false
+	}
+	return s == AccountSuicide
+}
+
+func (key *RWKey) ToAccountSelf() RWKey {
+	return AccountStateKey(key.Addr(), AccountSelf)
+}
+
+func (key *RWKey) IsStorageState() bool {
+	return StorageStatePrefix == key[0]
+}
+
+func (key *RWKey) String() string {
+	return hex.EncodeToString(key[:])
+}
+
+func (key *RWKey) Addr() common.Address {
+	return common.BytesToAddress(key[1 : 1+common.AddressLength])
+}
+
+type PendingWrite struct {
+	Ver StateVersion
+	Val interface{}
+}
+
+func NewPendingWrite(ver StateVersion, wr *WriteRecord) *PendingWrite {
+	return &PendingWrite{
+		Ver: ver,
+		Val: wr.Val,
+	}
+}
+
+func (w *PendingWrite) TxIndex() int {
+	return w.Ver.TxIndex
+}
+
+func (w *PendingWrite) TxIncarnation() int {
+	return w.Ver.TxIncarnation
+}
+
+type PendingWrites struct {
+	list []*PendingWrite
+}
+
+func NewPendingWrites() *PendingWrites {
+	return &PendingWrites{
+		list: make([]*PendingWrite, 0),
+	}
+}
+
+func (w *PendingWrites) Append(pw *PendingWrite) {
+	if i, found := w.SearchTxIndex(pw.TxIndex()); found {
+		w.list[i] = pw
+		return
+	}
+
+	w.list = append(w.list, pw)
+	for i := len(w.list) - 1; i > 0; i-- {
+		if w.list[i].TxIndex() > w.list[i-1].TxIndex() {
+			break
+		}
+		w.list[i-1], w.list[i] = w.list[i], w.list[i-1]
+	}
+}
+
+func (w *PendingWrites) SearchTxIndex(txIndex int) (int, bool) {
+	n := len(w.list)
+	i, j := 0, n
+	for i < j {
+		h := int(uint(i+j) >> 1)
+		// i ≤ h < j
+		if w.list[h].TxIndex() < txIndex {
+			i = h + 1
+		} else {
+			j = h
+		}
+	}
+	return i, i < n && w.list[i].TxIndex() == txIndex
+}
+
+func (w *PendingWrites) FindLastWrite(txIndex int) *PendingWrite {
+	var i, _ = w.SearchTxIndex(txIndex)
+	for j := i - 1; j >= 0; j-- {
+		if w.list[j].TxIndex() < txIndex {
+			return w.list[j]
+		}
+	}
+
+	return nil
+}
+
+type MVStates struct {
+	rwSets          []*RWSet
+	stats           []*ExeStat
+	pendingWriteSet map[RWKey]*PendingWrites
+	lock            sync.RWMutex
+}
+
+func NewMVStates(txCount int) *MVStates {
+	return &MVStates{
+		rwSets:          make([]*RWSet, txCount),
+		stats:           make([]*ExeStat, txCount),
+		pendingWriteSet: make(map[RWKey]*PendingWrites, txCount*8),
+	}
+}
+
+func (s *MVStates) RWSets() []*RWSet {
+	s.lock.RLock()
+	defer s.lock.RUnlock()
+	return s.rwSets
+}
+
+func (s *MVStates) Stats() []*ExeStat {
+	s.lock.RLock()
+	defer s.lock.RUnlock()
+	return s.stats
+}
+
+func (s *MVStates) RWSet(index int) *RWSet {
+	s.lock.RLock()
+	defer s.lock.RUnlock()
+	return s.rwSets[index]
+}
+
+func (s *MVStates) FulfillRWSet(rwSet *RWSet, stat *ExeStat) error {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	index := rwSet.ver.TxIndex
+	if index >= len(s.rwSets) {
+		return errors.New("refill out of bound")
+	}
+	if s := s.rwSets[index]; s != nil {
+		return errors.New("refill a exist RWSet")
+	}
+	if stat != nil {
+		if stat.txIndex != index {
+			return errors.New("wrong execution stat")
+		}
+		s.stats[index] = stat
+	}
+
+	for k, v := range rwSet.writeSet {
+		// ignore no changed write record
+		checkRWSetInconsistent(index, k, rwSet.readSet, rwSet.writeSet)
+		// this will be handled by state object
+		//if rwSet.readSet[k] != nil && isEqualRWVal(k, rwSet.readSet[k].Val, v.Val) {
+		//	delete(rwSet.writeSet, k)
+		//	continue
+		//}
+		if _, exist := s.pendingWriteSet[k]; !exist {
+			s.pendingWriteSet[k] = NewPendingWrites()
+		}
+		s.pendingWriteSet[k].Append(NewPendingWrite(rwSet.ver, v))
+	}
+	s.rwSets[index] = rwSet
+	return nil
+}
+
+func checkRWSetInconsistent(index int, k RWKey, readSet map[RWKey]*ReadRecord, writeSet map[RWKey]*WriteRecord) bool {
+	var (
+		readOk  bool
+		writeOk bool
+		r       *WriteRecord
+	)
+
+	if k.IsAccountSuicide() {
+		_, readOk = readSet[k.ToAccountSelf()]
+	} else {
+		_, readOk = readSet[k]
+	}
+
+	r, writeOk = writeSet[k]
+	if readOk != writeOk {
+		// check if it's correct? read nil, write non-nil
+		log.Info("checkRWSetInconsistent find inconsistent", "tx", index, "k", k.String(), "read", readOk, "write", writeOk, "val", r.Val)
+		return true
+	}
+
+	return false
+}
+
+func isEqualRWVal(key RWKey, src interface{}, compared interface{}) bool {
+	if ok, state := key.IsAccountState(); ok {
+		switch state {
+		case AccountBalance:
+			if src != nil && compared != nil {
+				return equalUint256(src.(*uint256.Int), compared.(*uint256.Int))
+			}
+			return src == compared
+		case AccountNonce:
+			return src.(uint64) == compared.(uint64)
+		case AccountCodeHash:
+			if src != nil && compared != nil {
+				return slices.Equal(src.([]byte), compared.([]byte))
+			}
+			return src == compared
+		}
+		return false
+	}
+
+	if src != nil && compared != nil {
+		return src.(common.Hash) == compared.(common.Hash)
+	}
+	return src == compared
+}
+
+func equalUint256(s, c *uint256.Int) bool {
+	if s != nil && c != nil {
+		return s.Eq(c)
+	}
+
+	return s == c
+}
+
+func (s *MVStates) ResolveTxDAG() *TxDAG {
+	rwSets := s.RWSets()
+	txDAG := NewTxDAG(len(rwSets))
+	for i := len(rwSets) - 1; i >= 0; i-- {
+		txDAG.TxDeps[i].TxIndexes = []int{}
+		if rwSets[i].mustSerial {
+			txDAG.TxDeps[i].Relation = 1
+			continue
+		}
+		readSet := rwSets[i].ReadSet()
+		// TODO: check if there are RW with system address
+		// check if there has written op before i
+		for j := 0; j < i; j++ {
+			if checkDependency(rwSets[j].writeSet, readSet) {
+				txDAG.TxDeps[i].AppendDep(j)
+			}
+		}
+	}
+
+	return txDAG
+}
+
+func checkDependency(writeSet map[RWKey]*WriteRecord, readSet map[RWKey]*ReadRecord) bool {
+	// check tx dependency, only check key, skip version
+	for k, _ := range writeSet {
+		// check suicide, add read address flag, it only for check suicide quickly, and cannot for other scenarios.
+		if k.IsAccountSuicide() {
+			if _, ok := readSet[k.ToAccountSelf()]; ok {
+				return true
+			}
+			continue
+		}
+		if _, ok := readSet[k]; ok {
+			return true
+		}
+	}
+
+	return false
+}
+
+type ExeStat struct {
+	txIndex   int
+	usedGas   uint64
+	readCount int
+	startTime time.Time
+	costTime  time.Duration
+	// TODO: consider system tx, gas fee issues, may need to use different flag
+	mustSerialFlag bool
+}
+
+func NewExeStat(txIndex int) *ExeStat {
+	return &ExeStat{
+		txIndex: txIndex,
+	}
+}
+
+func (s *ExeStat) Begin() *ExeStat {
+	s.startTime = time.Now()
+	return s
+}
+
+func (s *ExeStat) Done() *ExeStat {
+	s.costTime = time.Since(s.startTime)
+	return s
+}
+
+func (s *ExeStat) WithSerialFlag() *ExeStat {
+	s.mustSerialFlag = true
+	return s
+}
+
+func (s *ExeStat) WithGas(gas uint64) *ExeStat {
+	s.usedGas = gas
+	return s
+}
+
+func (s *ExeStat) WithRead(rc int) *ExeStat {
+	s.readCount = rc
+	return s
+}

core/types/dag_test.go

@@ -0,0 +1,239 @@
+package types
+
+import (
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/holiman/uint256"
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+var (
+	mockAddr = common.HexToAddress("0x482bA86399ab6Dcbe54071f8d22258688B4509b1")
+	mockHash = common.HexToHash("0xdc13f8d7bdb8ec4de02cd4a50a1aa2ab73ec8814e0cdb550341623be3dd8ab7a")
+)
+
+func TestTxDAG(t *testing.T) {
+	dag := mockSimpleDAG()
+	t.Log(dag.String())
+	dag = mockSystemTxDAG()
+	t.Log(dag.String())
+}
+
+func TestEvaluateTxDAG(t *testing.T) {
+	dag := mockSystemTxDAG()
+	stats := make([]*ExeStat, len(dag.TxDeps))
+	for i, dep := range dag.TxDeps {
+		stats[i] = NewExeStat(i).WithGas(uint64(i)).WithRead(i)
+		stats[i].costTime = int64(i)
+		if dep.Relation == 1 {
+			stats[i].WithSerialFlag()
+		}
+	}
+	t.Log(EvaluateTxDAGPerformance(dag, stats))
+}
+
+func TestSimpleMVStates2TxDAG(t *testing.T) {
+	ms := NewMVStates(10)
+
+	ms.rwSets[0] = mockRWSet(0, []string{"0x00"}, []string{"0x00"})
+	ms.rwSets[1] = mockRWSet(1, []string{"0x01"}, []string{"0x01"})
+	ms.rwSets[2] = mockRWSet(2, []string{"0x02"}, []string{"0x02"})
+	ms.rwSets[3] = mockRWSet(3, []string{"0x00", "0x03"}, []string{"0x03"})
+	ms.rwSets[4] = mockRWSet(4, []string{"0x00", "0x04"}, []string{"0x04"})
+	ms.rwSets[5] = mockRWSet(5, []string{"0x01", "0x02", "0x05"}, []string{"0x05"})
+	ms.rwSets[6] = mockRWSet(6, []string{"0x02", "0x05", "0x06"}, []string{"0x06"})
+	ms.rwSets[7] = mockRWSet(7, []string{"0x06", "0x07"}, []string{"0x07"})
+	ms.rwSets[8] = mockRWSet(8, []string{"0x08"}, []string{"0x08"})
+	ms.rwSets[9] = mockRWSet(9, []string{"0x08", "0x09"}, []string{"0x09"})
+
+	dag := ms.ResolveTxDAG()
+	require.Equal(t, mockSimpleDAG(), dag)
+	t.Log(dag.String())
+}
+
+func TestSystemTxMVStates2TxDAG(t *testing.T) {
+	ms := NewMVStates(12)
+
+	ms.rwSets[0] = mockRWSet(0, []string{"0x00"}, []string{"0x00"})
+	ms.rwSets[1] = mockRWSet(1, []string{"0x01"}, []string{"0x01"})
+	ms.rwSets[2] = mockRWSet(2, []string{"0x02"}, []string{"0x02"})
+	ms.rwSets[3] = mockRWSet(3, []string{"0x00", "0x03"}, []string{"0x03"})
+	ms.rwSets[4] = mockRWSet(4, []string{"0x00", "0x04"}, []string{"0x04"})
+	ms.rwSets[5] = mockRWSet(5, []string{"0x01", "0x02", "0x05"}, []string{"0x05"})
+	ms.rwSets[6] = mockRWSet(6, []string{"0x02", "0x05", "0x06"}, []string{"0x06"})
+	ms.rwSets[7] = mockRWSet(7, []string{"0x06", "0x07"}, []string{"0x07"})
+	ms.rwSets[8] = mockRWSet(8, []string{"0x08"}, []string{"0x08"})
+	ms.rwSets[9] = mockRWSet(9, []string{"0x08", "0x09"}, []string{"0x09"})
+	ms.rwSets[10] = mockRWSet(10, []string{"0x10"}, []string{"0x10"}).WithSerialFlag()
+	ms.rwSets[11] = mockRWSet(11, []string{"0x11"}, []string{"0x11"}).WithSerialFlag()
+
+	dag := ms.ResolveTxDAG()
+	require.Equal(t, mockSystemTxDAG(), dag)
+	t.Log(dag.String())
+}
+
+func TestIsEqualRWVal(t *testing.T) {
+	tests := []struct {
+		key      RWKey
+		src      interface{}
+		compared interface{}
+		isEqual  bool
+	}{
+		{
+			key:      AccountStateKey(mockAddr, AccountNonce),
+			src:      uint64(0),
+			compared: uint64(0),
+			isEqual:  true,
+		},
+		{
+			key:      AccountStateKey(mockAddr, AccountNonce),
+			src:      uint64(0),
+			compared: uint64(1),
+			isEqual:  false,
+		},
+		{
+			key:      AccountStateKey(mockAddr, AccountBalance),
+			src:      new(uint256.Int).SetUint64(1),
+			compared: new(uint256.Int).SetUint64(1),
+			isEqual:  true,
+		},
+		{
+			key:      AccountStateKey(mockAddr, AccountBalance),
+			src:      nil,
+			compared: new(uint256.Int).SetUint64(1),
+			isEqual:  false,
+		},
+		{
+			key:      AccountStateKey(mockAddr, AccountBalance),
+			src:      (*uint256.Int)(nil),
+			compared: new(uint256.Int).SetUint64(1),
+			isEqual:  false,
+		},
+		{
+			key:      AccountStateKey(mockAddr, AccountBalance),
+			src:      (*uint256.Int)(nil),
+			compared: (*uint256.Int)(nil),
+			isEqual:  true,
+		},
+		{
+			key:      AccountStateKey(mockAddr, AccountCodeHash),
+			src:      []byte{1},
+			compared: []byte{1},
+			isEqual:  true,
+		},
+		{
+			key:      AccountStateKey(mockAddr, AccountCodeHash),
+			src:      nil,
+			compared: []byte{1},
+			isEqual:  false,
+		},
+		{
+			key:      AccountStateKey(mockAddr, AccountCodeHash),
+			src:      ([]byte)(nil),
+			compared: []byte{1},
+			isEqual:  false,
+		},
+		{
+			key:      AccountStateKey(mockAddr, AccountCodeHash),
+			src:      ([]byte)(nil),
+			compared: ([]byte)(nil),
+			isEqual:  true,
+		},
+		{
+			key:      AccountStateKey(mockAddr, AccountSuicide),
+			src:      struct{}{},
+			compared: struct{}{},
+			isEqual:  false,
+		},
+		{
+			key:      AccountStateKey(mockAddr, AccountSuicide),
+			src:      nil,
+			compared: struct{}{},
+			isEqual:  false,
+		},
+		{
+			key:      StorageStateKey(mockAddr, mockHash),
+			src:      mockHash,
+			compared: mockHash,
+			isEqual:  true,
+		},
+		{
+			key:      StorageStateKey(mockAddr, mockHash),
+			src:      nil,
+			compared: mockHash,
+			isEqual:  false,
+		},
+	}
+
+	for i, item := range tests {
+		require.Equal(t, item.isEqual, isEqualRWVal(item.key, item.src, item.compared), i)
+	}
+}
+
+func mockSimpleDAG() *TxDAG {
+	dag := NewTxDAG(10)
+	dag.TxDeps[0].TxIndexes = []int{}
+	dag.TxDeps[1].TxIndexes = []int{}
+	dag.TxDeps[2].TxIndexes = []int{}
+	dag.TxDeps[3].TxIndexes = []int{0}
+	dag.TxDeps[4].TxIndexes = []int{0}
+	dag.TxDeps[5].TxIndexes = []int{1, 2}
+	dag.TxDeps[6].TxIndexes = []int{2, 5}
+	dag.TxDeps[7].TxIndexes = []int{6}
+	dag.TxDeps[8].TxIndexes = []int{}
+	dag.TxDeps[9].TxIndexes = []int{8}
+	return dag
+}
+
+func mockSystemTxDAG() *TxDAG {
+	dag := NewTxDAG(12)
+	dag.TxDeps[0].TxIndexes = []int{}
+	dag.TxDeps[1].TxIndexes = []int{}
+	dag.TxDeps[2].TxIndexes = []int{}
+	dag.TxDeps[3].TxIndexes = []int{0}
+	dag.TxDeps[4].TxIndexes = []int{0}
+	dag.TxDeps[5].TxIndexes = []int{1, 2}
+	dag.TxDeps[6].TxIndexes = []int{2, 5}
+	dag.TxDeps[7].TxIndexes = []int{6}
+	dag.TxDeps[8].TxIndexes = []int{}
+	dag.TxDeps[9].TxIndexes = []int{8}
+	dag.TxDeps[10] = TxDep{
+		Relation:  1,
+		TxIndexes: []int{},
+	}
+	dag.TxDeps[11] = TxDep{
+		Relation:  1,
+		TxIndexes: []int{},
+	}
+	return dag
+}
+
+func mockRWSet(index int, read []string, write []string) *RWSet {
+	ver := StateVersion{
+		TxIndex: index,
+	}
+	set := NewRWSet(ver)
+	for _, k := range read {
+		key := RWKey{}
+		if len(k) > len(key) {
+			k = k[:len(key)]
+		}
+		copy(key[:], k)
+		set.readSet[key] = &ReadRecord{
+			StateVersion: ver,
+			Val:          struct{}{},
+		}
+	}
+	for _, k := range write {
+		key := RWKey{}
+		if len(k) > len(key) {
+			k = k[:len(key)]
+		}
+		copy(key[:], k)
+		set.writeSet[key] = &WriteRecord{
+			Val: struct{}{},
+		}
+	}
+
+	return set
+}

core/vm/interface.go

@@ -79,6 +79,10 @@ type StateDB interface {
 
 	AddLog(*types.Log)
 	AddPreimage(common.Hash, []byte)
+
+	// parallel DAG related
+	BeforeTxTransition()
+	FinaliseRWSet() error
 }
 
 // CallContext provides a basic interface for the EVM calling conventions. The EVM

eth/state_accessor.go

@@ -281,7 +281,7 @@ func (eth *Ethereum) stateAtTransaction(ctx context.Context, block *types.Block,
 		}
 		// Not yet the searched for transaction, execute on top of the current state
 		vmenv := vm.NewEVM(context, txContext, statedb, eth.blockchain.Config(), vm.Config{})
-		statedb.SetTxContext(tx.Hash(), idx)
+		statedb.SetTxContext(tx.Hash(), idx, 0)
 		if _, err := core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(tx.Gas())); err != nil {
 			return nil, vm.BlockContext{}, nil, nil, fmt.Errorf("transaction %#x failed: %v", tx.Hash(), err)
 		}

eth/tracers/api.go

@@ -587,7 +587,7 @@ func (api *API) IntermediateRoots(ctx context.Context, hash common.Hash, config
 			}
 		}
 
-		statedb.SetTxContext(tx.Hash(), i)
+		statedb.SetTxContext(tx.Hash(), i, 0)
 		if _, err := core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(msg.GasLimit)); err != nil {
 			log.Warn("Tracing intermediate roots did not complete", "txindex", i, "txhash", tx.Hash(), "err", err)
 			// We intentionally don't return the error here: if we do, then the RPC server will not
@@ -786,7 +786,7 @@ txloop:
 
 		// Generate the next state snapshot fast without tracing
 		msg, _ := core.TransactionToMessage(tx, signer, block.BaseFee())
-		statedb.SetTxContext(tx.Hash(), i)
+		statedb.SetTxContext(tx.Hash(), i, 0)
 		vmenv := vm.NewEVM(blockCtx, core.NewEVMTxContext(msg), statedb, api.backend.ChainConfig(), vm.Config{})
 		if _, err := core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(msg.GasLimit)); err != nil {
 			failed = err
@@ -919,7 +919,7 @@ func (api *API) standardTraceBlockToFile(ctx context.Context, block *types.Block
 		}
 		// Execute the transaction and flush any traces to disk
 		vmenv := vm.NewEVM(vmctx, txContext, statedb, chainConfig, vmConf)
-		statedb.SetTxContext(tx.Hash(), i)
+		statedb.SetTxContext(tx.Hash(), i, 0)
 		_, err = core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(msg.GasLimit))
 		if writer != nil {
 			writer.Flush()
@@ -1127,7 +1127,7 @@ func (api *API) traceTx(ctx context.Context, message *core.Message, txctx *Conte
 	}
 
 	// Call Prepare to clear out the statedb access list
-	statedb.SetTxContext(txctx.TxHash, txctx.TxIndex)
+	statedb.SetTxContext(txctx.TxHash, txctx.TxIndex, 0)
 	if _, err = core.ApplyMessage(vmenv, message, new(core.GasPool).AddGas(message.GasLimit)); err != nil {
 		return nil, fmt.Errorf("tracing failed: %w", err)
 	}

miner/bid_simulator.go

@@ -756,7 +756,7 @@ func (r *BidRuntime) commitTransaction(chain *core.BlockChain, chainConfig *para
 	)
 
 	// Start executing the transaction
-	r.env.state.SetTxContext(tx.Hash(), r.env.tcount)
+	r.env.state.SetTxContext(tx.Hash(), r.env.tcount, 0)
 
 	if tx.Type() == types.BlobTxType {
 		sc = types.NewBlobSidecarFromTx(tx)

miner/worker.go

@@ -903,7 +903,7 @@ LOOP:
 			continue
 		}
 		// Start executing the transaction
-		env.state.SetTxContext(tx.Hash(), env.tcount)
+		env.state.SetTxContext(tx.Hash(), env.tcount, 0)
 
 		logs, err := w.commitTransaction(env, tx, bloomProcessors)
 		switch {