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Merge #9014: Fix block-connection performance regression

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dd0df81 Document ConnectBlock connectTrace postconditions (Matt Corallo)
2d6e561 Switch pblock in ProcessNewBlock to a shared_ptr (Matt Corallo)
2736c44 Make the optional pblock in ActivateBestChain a shared_ptr (Matt Corallo)
ae4db44 Create a shared_ptr for the block we're connecting in ActivateBCS (Matt Corallo)
fd9d890 Keep blocks as shared_ptrs, instead of copying txn in ConnectTip (Matt Corallo)
6fdd43b Add struct to track block-connect-time-generated info for callbacks (Matt Corallo)
This commit is contained in:
Wladimir J. van der Laan 2016-12-05 08:07:22 +01:00
commit d04aebaec7
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GPG key ID: 74810B012346C9A6
7 changed files with 60 additions and 40 deletions
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16
src/net_processing.cpp
View file

@ -1894,7 +1894,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
BlockTransactions resp;
vRecv >> resp;
CBlock block;
std::shared_ptr<CBlock> pblock = std::make_shared<CBlock>();
bool fBlockRead = false;
{
LOCK(cs_main);
@ -1907,7 +1907,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
}
PartiallyDownloadedBlock& partialBlock = *it->second.second->partialBlock;
ReadStatus status = partialBlock.FillBlock(block, resp.txn);
ReadStatus status = partialBlock.FillBlock(*pblock, resp.txn);
if (status == READ_STATUS_INVALID) {
MarkBlockAsReceived(resp.blockhash); // Reset in-flight state in case of whitelist
Misbehaving(pfrom->GetId(), 100);
@ -1950,7 +1950,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
bool fNewBlock = false;
// Since we requested this block (it was in mapBlocksInFlight), force it to be processed,
// even if it would not be a candidate for new tip (missing previous block, chain not long enough, etc)
ProcessNewBlock(chainparams, &block, true, NULL, &fNewBlock);
ProcessNewBlock(chainparams, pblock, true, NULL, &fNewBlock);
if (fNewBlock)
pfrom->nLastBlockTime = GetTime();
}
@ -2111,17 +2111,17 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
else if (strCommand == NetMsgType::BLOCK && !fImporting && !fReindex) // Ignore blocks received while importing
{
CBlock block;
vRecv >> block;
std::shared_ptr<CBlock> pblock = std::make_shared<CBlock>();
vRecv >> *pblock;
LogPrint("net", "received block %s peer=%d\n", block.GetHash().ToString(), pfrom->id);
LogPrint("net", "received block %s peer=%d\n", pblock->GetHash().ToString(), pfrom->id);
// Process all blocks from whitelisted peers, even if not requested,
// unless we're still syncing with the network.
// Such an unrequested block may still be processed, subject to the
// conditions in AcceptBlock().
bool forceProcessing = pfrom->fWhitelisted && !IsInitialBlockDownload();
const uint256 hash(block.GetHash());
const uint256 hash(pblock->GetHash());
{
LOCK(cs_main);
// Also always process if we requested the block explicitly, as we may
@ -2132,7 +2132,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
mapBlockSource.emplace(hash, std::make_pair(pfrom->GetId(), true));
}
bool fNewBlock = false;
ProcessNewBlock(chainparams, &block, forceProcessing, NULL, &fNewBlock);
ProcessNewBlock(chainparams, pblock, forceProcessing, NULL, &fNewBlock);
if (fNewBlock)
pfrom->nLastBlockTime = GetTime();
}

4
src/rpc/blockchain.cpp
View file

@ -1319,7 +1319,7 @@ UniValue invalidateblock(const JSONRPCRequest& request)
}
if (state.IsValid()) {
ActivateBestChain(state, Params(), NULL);
ActivateBestChain(state, Params());
}
if (!state.IsValid()) {
@ -1357,7 +1357,7 @@ UniValue reconsiderblock(const JSONRPCRequest& request)
}
CValidationState state;
ActivateBestChain(state, Params(), NULL);
ActivateBestChain(state, Params());
if (!state.IsValid()) {
throw JSONRPCError(RPC_DATABASE_ERROR, state.GetRejectReason());

8
src/rpc/mining.cpp
View file

@ -131,7 +131,8 @@ UniValue generateBlocks(boost::shared_ptr<CReserveScript> coinbaseScript, int nG
if (pblock->nNonce == nInnerLoopCount) {
continue;
}
if (!ProcessNewBlock(Params(), pblock, true, NULL, NULL))
std::shared_ptr<const CBlock> shared_pblock = std::make_shared<const CBlock>(*pblock);
if (!ProcessNewBlock(Params(), shared_pblock, true, NULL, NULL))
throw JSONRPCError(RPC_INTERNAL_ERROR, "ProcessNewBlock, block not accepted");
++nHeight;
blockHashes.push_back(pblock->GetHash().GetHex());
@ -728,7 +729,8 @@ UniValue submitblock(const JSONRPCRequest& request)
+ HelpExampleRpc("submitblock", "\"mydata\"")
);
CBlock block;
std::shared_ptr<CBlock> blockptr = std::make_shared<CBlock>();
CBlock& block = *blockptr;
if (!DecodeHexBlk(block, request.params[0].get_str()))
throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Block decode failed");
@ -758,7 +760,7 @@ UniValue submitblock(const JSONRPCRequest& request)
submitblock_StateCatcher sc(block.GetHash());
RegisterValidationInterface(&sc);
bool fAccepted = ProcessNewBlock(Params(), &block, true, NULL, NULL);
bool fAccepted = ProcessNewBlock(Params(), blockptr, true, NULL, NULL);
UnregisterValidationInterface(&sc);
if (fBlockPresent)
{

3
src/test/miner_tests.cpp
View file

@ -223,7 +223,8 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
txFirst.push_back(pblock->vtx[0]);
pblock->hashMerkleRoot = BlockMerkleRoot(*pblock);
pblock->nNonce = blockinfo[i].nonce;
BOOST_CHECK(ProcessNewBlock(chainparams, pblock, true, NULL, NULL));
std::shared_ptr<const CBlock> shared_pblock = std::make_shared<const CBlock>(*pblock);
BOOST_CHECK(ProcessNewBlock(chainparams, shared_pblock, true, NULL, NULL));
pblock->hashPrevBlock = pblock->GetHash();
}

3
src/test/test_bitcoin.cpp
View file

@ -127,7 +127,8 @@ TestChain100Setup::CreateAndProcessBlock(const std::vector<CMutableTransaction>&
while (!CheckProofOfWork(block.GetHash(), block.nBits, chainparams.GetConsensus())) ++block.nNonce;
ProcessNewBlock(chainparams, &block, true, NULL, NULL);
std::shared_ptr<const CBlock> shared_pblock = std::make_shared<const CBlock>(block);
ProcessNewBlock(chainparams, shared_pblock, true, NULL, NULL);
CBlock result = block;
return result;

62
src/validation.cpp
View file

@ -2152,29 +2152,45 @@ static int64_t nTimeFlush = 0;
static int64_t nTimeChainState = 0;
static int64_t nTimePostConnect = 0;
/**
* Used to track conflicted transactions removed from mempool and transactions
* applied to the UTXO state as a part of a single ActivateBestChainStep call.
*/
struct ConnectTrace {
std::vector<CTransactionRef> txConflicted;
std::vector<std::pair<CBlockIndex*, std::shared_ptr<const CBlock> > > blocksConnected;
};
/**
* Connect a new block to chainActive. pblock is either NULL or a pointer to a CBlock
* corresponding to pindexNew, to bypass loading it again from disk.
*
* The block is always added to connectTrace (either after loading from disk or by copying
* pblock) - if that is not intended, care must be taken to remove the last entry in
* blocksConnected in case of failure.
*/
bool static ConnectTip(CValidationState& state, const CChainParams& chainparams, CBlockIndex* pindexNew, const CBlock* pblock, std::vector<CTransactionRef> &txConflicted, std::vector<std::tuple<CTransactionRef,CBlockIndex*,int>> &txChanged)
bool static ConnectTip(CValidationState& state, const CChainParams& chainparams, CBlockIndex* pindexNew, const std::shared_ptr<const CBlock>& pblock, ConnectTrace& connectTrace)
{
assert(pindexNew->pprev == chainActive.Tip());
// Read block from disk.
int64_t nTime1 = GetTimeMicros();
CBlock block;
if (!pblock) {
if (!ReadBlockFromDisk(block, pindexNew, chainparams.GetConsensus()))
std::shared_ptr<CBlock> pblockNew = std::make_shared<CBlock>();
connectTrace.blocksConnected.emplace_back(pindexNew, pblockNew);
if (!ReadBlockFromDisk(*pblockNew, pindexNew, chainparams.GetConsensus()))
return AbortNode(state, "Failed to read block");
pblock = &block;
} else {
connectTrace.blocksConnected.emplace_back(pindexNew, pblock);
}
const CBlock& blockConnecting = *connectTrace.blocksConnected.back().second;
// Apply the block atomically to the chain state.
int64_t nTime2 = GetTimeMicros(); nTimeReadFromDisk += nTime2 - nTime1;
int64_t nTime3;
LogPrint("bench", " - Load block from disk: %.2fms [%.2fs]\n", (nTime2 - nTime1) * 0.001, nTimeReadFromDisk * 0.000001);
{
CCoinsViewCache view(pcoinsTip);
bool rv = ConnectBlock(*pblock, state, pindexNew, view, chainparams);
GetMainSignals().BlockChecked(*pblock, state);
bool rv = ConnectBlock(blockConnecting, state, pindexNew, view, chainparams);
GetMainSignals().BlockChecked(blockConnecting, state);
if (!rv) {
if (state.IsInvalid())
InvalidBlockFound(pindexNew, state);
@ -2192,13 +2208,10 @@ bool static ConnectTip(CValidationState& state, const CChainParams& chainparams,
int64_t nTime5 = GetTimeMicros(); nTimeChainState += nTime5 - nTime4;
LogPrint("bench", " - Writing chainstate: %.2fms [%.2fs]\n", (nTime5 - nTime4) * 0.001, nTimeChainState * 0.000001);
// Remove conflicting transactions from the mempool.;
mempool.removeForBlock(pblock->vtx, pindexNew->nHeight, &txConflicted, !IsInitialBlockDownload());
mempool.removeForBlock(blockConnecting.vtx, pindexNew->nHeight, &connectTrace.txConflicted, !IsInitialBlockDownload());
// Update chainActive & related variables.
UpdateTip(pindexNew, chainparams);
for (unsigned int i=0; i < pblock->vtx.size(); i++)
txChanged.emplace_back(pblock->vtx[i], pindexNew, i);
int64_t nTime6 = GetTimeMicros(); nTimePostConnect += nTime6 - nTime5; nTimeTotal += nTime6 - nTime1;
LogPrint("bench", " - Connect postprocess: %.2fms [%.2fs]\n", (nTime6 - nTime5) * 0.001, nTimePostConnect * 0.000001);
LogPrint("bench", "- Connect block: %.2fms [%.2fs]\n", (nTime6 - nTime1) * 0.001, nTimeTotal * 0.000001);
@ -2279,7 +2292,7 @@ static void PruneBlockIndexCandidates() {
* Try to make some progress towards making pindexMostWork the active block.
* pblock is either NULL or a pointer to a CBlock corresponding to pindexMostWork.
*/
static bool ActivateBestChainStep(CValidationState& state, const CChainParams& chainparams, CBlockIndex* pindexMostWork, const CBlock* pblock, bool& fInvalidFound, std::vector<CTransactionRef>& txConflicted, std::vector<std::tuple<CTransactionRef,CBlockIndex*,int>>& txChanged)
static bool ActivateBestChainStep(CValidationState& state, const CChainParams& chainparams, CBlockIndex* pindexMostWork, const std::shared_ptr<const CBlock>& pblock, bool& fInvalidFound, ConnectTrace& connectTrace)
{
AssertLockHeld(cs_main);
const CBlockIndex *pindexOldTip = chainActive.Tip();
@ -2312,7 +2325,7 @@ static bool ActivateBestChainStep(CValidationState& state, const CChainParams& c
// Connect new blocks.
BOOST_REVERSE_FOREACH(CBlockIndex *pindexConnect, vpindexToConnect) {
if (!ConnectTip(state, chainparams, pindexConnect, pindexConnect == pindexMostWork ? pblock : NULL, txConflicted, txChanged)) {
if (!ConnectTip(state, chainparams, pindexConnect, pindexConnect == pindexMostWork ? pblock : std::shared_ptr<const CBlock>(), connectTrace)) {
if (state.IsInvalid()) {
// The block violates a consensus rule.
if (!state.CorruptionPossible())
@ -2320,6 +2333,8 @@ static bool ActivateBestChainStep(CValidationState& state, const CChainParams& c
state = CValidationState();
fInvalidFound = true;
fContinue = false;
// If we didn't actually connect the block, don't notify listeners about it
connectTrace.blocksConnected.pop_back();
break;
} else {
// A system error occurred (disk space, database error, ...).
@ -2377,20 +2392,16 @@ static void NotifyHeaderTip() {
* or an activated best chain. pblock is either NULL or a pointer to a block
* that is already loaded (to avoid loading it again from disk).
*/
bool ActivateBestChain(CValidationState &state, const CChainParams& chainparams, const CBlock *pblock) {
bool ActivateBestChain(CValidationState &state, const CChainParams& chainparams, std::shared_ptr<const CBlock> pblock) {
CBlockIndex *pindexMostWork = NULL;
CBlockIndex *pindexNewTip = NULL;
std::vector<std::tuple<CTransactionRef,CBlockIndex*,int>> txChanged;
if (pblock)
txChanged.reserve(pblock->vtx.size());
do {
txChanged.clear();
boost::this_thread::interruption_point();
if (ShutdownRequested())
break;
const CBlockIndex *pindexFork;
std::vector<CTransactionRef> txConflicted;
ConnectTrace connectTrace;
bool fInitialDownload;
{
LOCK(cs_main);
@ -2404,7 +2415,8 @@ bool ActivateBestChain(CValidationState &state, const CChainParams& chainparams,
return true;
bool fInvalidFound = false;
if (!ActivateBestChainStep(state, chainparams, pindexMostWork, pblock && pblock->GetHash() == pindexMostWork->GetBlockHash() ? pblock : NULL, fInvalidFound, txConflicted, txChanged))
std::shared_ptr<const CBlock> nullBlockPtr;
if (!ActivateBestChainStep(state, chainparams, pindexMostWork, pblock && pblock->GetHash() == pindexMostWork->GetBlockHash() ? pblock : nullBlockPtr, fInvalidFound, connectTrace))
return false;
if (fInvalidFound) {
@ -2421,13 +2433,17 @@ bool ActivateBestChain(CValidationState &state, const CChainParams& chainparams,
// throw all transactions though the signal-interface
// while _not_ holding the cs_main lock
for (const auto& tx : txConflicted)
for (const auto& tx : connectTrace.txConflicted)
{
GetMainSignals().SyncTransaction(*tx, pindexNewTip, CMainSignals::SYNC_TRANSACTION_NOT_IN_BLOCK);
}
// ... and about transactions that got confirmed:
for (unsigned int i = 0; i < txChanged.size(); i++)
GetMainSignals().SyncTransaction(*std::get<0>(txChanged[i]), std::get<1>(txChanged[i]), std::get<2>(txChanged[i]));
for (const auto& pair : connectTrace.blocksConnected) {
assert(pair.second);
const CBlock& block = *(pair.second);
for (unsigned int i = 0; i < block.vtx.size(); i++)
GetMainSignals().SyncTransaction(*block.vtx[i], pair.first, i);
}
// Notify external listeners about the new tip.
GetMainSignals().UpdatedBlockTip(pindexNewTip, pindexFork, fInitialDownload);
@ -3112,7 +3128,7 @@ static bool AcceptBlock(const CBlock& block, CValidationState& state, const CCha
return true;
}
bool ProcessNewBlock(const CChainParams& chainparams, const CBlock* pblock, bool fForceProcessing, const CDiskBlockPos* dbp, bool *fNewBlock)
bool ProcessNewBlock(const CChainParams& chainparams, const std::shared_ptr<const CBlock> pblock, bool fForceProcessing, const CDiskBlockPos* dbp, bool *fNewBlock)
{
{
LOCK(cs_main);

4
src/validation.h
View file

@ -233,7 +233,7 @@ static const uint64_t MIN_DISK_SPACE_FOR_BLOCK_FILES = 550 * 1024 * 1024;
* @param[out] fNewBlock A boolean which is set to indicate if the block was first received via this call
* @return True if state.IsValid()
*/
bool ProcessNewBlock(const CChainParams& chainparams, const CBlock* pblock, bool fForceProcessing, const CDiskBlockPos* dbp, bool* fNewBlock);
bool ProcessNewBlock(const CChainParams& chainparams, const std::shared_ptr<const CBlock> pblock, bool fForceProcessing, const CDiskBlockPos* dbp, bool* fNewBlock);
/**
* Process incoming block headers.
@ -278,7 +278,7 @@ std::string GetWarnings(const std::string& strFor);
/** Retrieve a transaction (from memory pool, or from disk, if possible) */
bool GetTransaction(const uint256 &hash, CTransactionRef &tx, const Consensus::Params& params, uint256 &hashBlock, bool fAllowSlow = false);
/** Find the best known block, and make it the tip of the block chain */
bool ActivateBestChain(CValidationState& state, const CChainParams& chainparams, const CBlock* pblock = NULL);
bool ActivateBestChain(CValidationState& state, const CChainParams& chainparams, std::shared_ptr<const CBlock> pblock = std::shared_ptr<const CBlock>());
CAmount GetBlockSubsidy(int nHeight, const Consensus::Params& consensusParams);
/**