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core: only fire one chain head per batch (#15123) 

* core: only fire one chain head per batch

* miner: announce chan events synchronously
This commit is contained in:
Péter Szilágyi 2017-09-11 13:13:05 +03:00 committed by GitHub
parent 5596b664c4
commit 10b3f97c9d
3 changed files with 63 additions and 67 deletions
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53
core/blockchain.go
View File

@ -854,9 +854,22 @@ func (bc *BlockChain) WriteBlockAndState(block *types.Block, receipts []*types.R
return status, nil
}
// InsertChain will attempt to insert the given chain in to the canonical chain or, otherwise, create a fork. If an error is returned
// it will return the index number of the failing block as well an error describing what went wrong (for possible errors see core/errors.go).
// InsertChain attempts to insert the given batch of blocks in to the canonical
// chain or, otherwise, create a fork. If an error is returned it will return
// the index number of the failing block as well an error describing what went
// wrong.
//
// After insertion is done, all accumulated events will be fired.
func (bc *BlockChain) InsertChain(chain types.Blocks) (int, error) {
n, events, logs, err := bc.insertChain(chain)
bc.PostChainEvents(events, logs)
return n, err
}
// insertChain will execute the actual chain insertion and event aggregation. The
// only reason this method exists as a separate one is to make locking cleaner
// with deferred statements.
func (bc *BlockChain) insertChain(chain types.Blocks) (int, []interface{}, []*types.Log, error) {
// Do a sanity check that the provided chain is actually ordered and linked
for i := 1; i < len(chain); i++ {
if chain[i].NumberU64() != chain[i-1].NumberU64()+1 || chain[i].ParentHash() != chain[i-1].Hash() {
@ -864,7 +877,7 @@ func (bc *BlockChain) InsertChain(chain types.Blocks) (int, error) {
log.Error("Non contiguous block insert", "number", chain[i].Number(), "hash", chain[i].Hash(),
"parent", chain[i].ParentHash(), "prevnumber", chain[i-1].Number(), "prevhash", chain[i-1].Hash())
return 0, fmt.Errorf("non contiguous insert: item %d is #%d [%x…], item %d is #%d [%x…] (parent [%x…])", i-1, chain[i-1].NumberU64(),
return 0, nil, nil, fmt.Errorf("non contiguous insert: item %d is #%d [%x…], item %d is #%d [%x…] (parent [%x…])", i-1, chain[i-1].NumberU64(),
chain[i-1].Hash().Bytes()[:4], i, chain[i].NumberU64(), chain[i].Hash().Bytes()[:4], chain[i].ParentHash().Bytes()[:4])
}
}
@ -881,6 +894,7 @@ func (bc *BlockChain) InsertChain(chain types.Blocks) (int, error) {
var (
stats = insertStats{startTime: mclock.Now()}
events = make([]interface{}, 0, len(chain))
lastCanon *types.Block
coalescedLogs []*types.Log
)
// Start the parallel header verifier
@ -904,7 +918,7 @@ func (bc *BlockChain) InsertChain(chain types.Blocks) (int, error) {
// If the header is a banned one, straight out abort
if BadHashes[block.Hash()] {
bc.reportBlock(block, nil, ErrBlacklistedHash)
return i, ErrBlacklistedHash
return i, events, coalescedLogs, ErrBlacklistedHash
}
// Wait for the block's verification to complete
bstart := time.Now()
@ -925,7 +939,7 @@ func (bc *BlockChain) InsertChain(chain types.Blocks) (int, error) {
// if given.
max := big.NewInt(time.Now().Unix() + maxTimeFutureBlocks)
if block.Time().Cmp(max) > 0 {
return i, fmt.Errorf("future block: %v > %v", block.Time(), max)
return i, events, coalescedLogs, fmt.Errorf("future block: %v > %v", block.Time(), max)
}
bc.futureBlocks.Add(block.Hash(), block)
stats.queued++
@ -939,7 +953,7 @@ func (bc *BlockChain) InsertChain(chain types.Blocks) (int, error) {
}
bc.reportBlock(block, nil, err)
return i, err
return i, events, coalescedLogs, err
}
// Create a new statedb using the parent block and report an
// error if it fails.
@ -951,40 +965,35 @@ func (bc *BlockChain) InsertChain(chain types.Blocks) (int, error) {
}
state, err := state.New(parent.Root(), bc.stateCache)
if err != nil {
return i, err
return i, events, coalescedLogs, err
}
// Process block using the parent state as reference point.
receipts, logs, usedGas, err := bc.processor.Process(block, state, bc.vmConfig)
if err != nil {
bc.reportBlock(block, receipts, err)
return i, err
return i, events, coalescedLogs, err
}
// Validate the state using the default validator
err = bc.Validator().ValidateState(block, parent, state, receipts, usedGas)
if err != nil {
bc.reportBlock(block, receipts, err)
return i, err
return i, events, coalescedLogs, err
}
// Write the block to the chain and get the status.
status, err := bc.WriteBlockAndState(block, receipts, state)
if err != nil {
return i, err
return i, events, coalescedLogs, err
}
switch status {
case CanonStatTy:
log.Debug("Inserted new block", "number", block.Number(), "hash", block.Hash(), "uncles", len(block.Uncles()),
"txs", len(block.Transactions()), "gas", block.GasUsed(), "elapsed", common.PrettyDuration(time.Since(bstart)))
// coalesce logs for later processing
coalescedLogs = append(coalescedLogs, logs...)
blockInsertTimer.UpdateSince(bstart)
events = append(events, ChainEvent{block, block.Hash(), logs})
// We need some control over the mining operation. Acquiring locks and waiting
// for the miner to create new block takes too long and in most cases isn't
// even necessary.
if bc.LastBlockHash() == block.Hash() {
events = append(events, ChainHeadEvent{block})
}
lastCanon = block
case SideStatTy:
log.Debug("Inserted forked block", "number", block.Number(), "hash", block.Hash(), "diff", block.Difficulty(), "elapsed",
common.PrettyDuration(time.Since(bstart)), "txs", len(block.Transactions()), "gas", block.GasUsed(), "uncles", len(block.Uncles()))
@ -996,9 +1005,11 @@ func (bc *BlockChain) InsertChain(chain types.Blocks) (int, error) {
stats.usedGas += usedGas.Uint64()
stats.report(chain, i)
}
go bc.PostChainEvents(events, coalescedLogs)
return 0, nil
// Append a single chain head event if we've progressed the chain
if lastCanon != nil && bc.LastBlockHash() == lastCanon.Hash() {
events = append(events, ChainHeadEvent{lastCanon})
}
return 0, events, coalescedLogs, nil
}
// insertStats tracks and reports on block insertion.

2
core/blockchain_test.go
View File

@ -935,7 +935,7 @@ func TestReorgSideEvent(t *testing.T) {
}
gen.AddTx(tx)
})
chainSideCh := make(chan ChainSideEvent)
chainSideCh := make(chan ChainSideEvent, 64)
blockchain.SubscribeChainSideEvent(chainSideCh)
if _, err := blockchain.InsertChain(replacementBlocks); err != nil {
t.Fatalf("failed to insert chain: %v", err)

75
miner/worker.go
View File

@ -125,8 +125,6 @@ type worker struct {
// atomic status counters
mining int32
atWork int32
fullValidation bool
}
func newWorker(config *params.ChainConfig, engine consensus.Engine, coinbase common.Address, eth Backend, mux *event.TypeMux) *worker {
@ -146,7 +144,6 @@ func newWorker(config *params.ChainConfig, engine consensus.Engine, coinbase com
coinbase: coinbase,
agents: make(map[Agent]struct{}),
unconfirmed: newUnconfirmedBlocks(eth.BlockChain(), miningLogAtDepth),
fullValidation: false,
}
// Subscribe TxPreEvent for tx pool
worker.txSub = eth.TxPool().SubscribeTxPreEvent(worker.txCh)
@ -297,50 +294,38 @@ func (self *worker) wait() {
block := result.Block
work := result.Work
if self.fullValidation {
if _, err := self.chain.InsertChain(types.Blocks{block}); err != nil {
log.Error("Mined invalid block", "err", err)
continue
// Update the block hash in all logs since it is now available and not when the
// receipt/log of individual transactions were created.
for _, r := range work.receipts {
for _, l := range r.Logs {
l.BlockHash = block.Hash()
}
go self.mux.Post(core.NewMinedBlockEvent{Block: block})
} else {
// Update the block hash in all logs since it is now available and not when the
// receipt/log of individual transactions were created.
for _, r := range work.receipts {
for _, l := range r.Logs {
l.BlockHash = block.Hash()
}
}
for _, log := range work.state.Logs() {
log.BlockHash = block.Hash()
}
stat, err := self.chain.WriteBlockAndState(block, work.receipts, work.state)
if err != nil {
log.Error("Failed writing block to chain", "err", err)
continue
}
// check if canon block and write transactions
if stat == core.CanonStatTy {
// implicit by posting ChainHeadEvent
mustCommitNewWork = false
}
// broadcast before waiting for validation
go func(block *types.Block, logs []*types.Log, receipts []*types.Receipt) {
self.mux.Post(core.NewMinedBlockEvent{Block: block})
var (
events []interface{}
coalescedLogs []*types.Log
)
events = append(events, core.ChainEvent{Block: block, Hash: block.Hash(), Logs: logs})
if stat == core.CanonStatTy {
events = append(events, core.ChainHeadEvent{Block: block})
coalescedLogs = logs
}
// post blockchain events
self.chain.PostChainEvents(events, coalescedLogs)
}(block, work.state.Logs(), work.receipts)
}
for _, log := range work.state.Logs() {
log.BlockHash = block.Hash()
}
stat, err := self.chain.WriteBlockAndState(block, work.receipts, work.state)
if err != nil {
log.Error("Failed writing block to chain", "err", err)
continue
}
// check if canon block and write transactions
if stat == core.CanonStatTy {
// implicit by posting ChainHeadEvent
mustCommitNewWork = false
}
// Broadcast the block and announce chain insertion event
self.mux.Post(core.NewMinedBlockEvent{Block: block})
var (
events []interface{}
logs = work.state.Logs()
)
events = append(events, core.ChainEvent{Block: block, Hash: block.Hash(), Logs: logs})
if stat == core.CanonStatTy {
events = append(events, core.ChainHeadEvent{Block: block})
}
self.chain.PostChainEvents(events, logs)
// Insert the block into the set of pending ones to wait for confirmations
self.unconfirmed.Insert(block.NumberU64(), block.Hash())