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Merge #9014: Fix block-connection performance regression 

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)
0.14
Wladimir J. van der Laan 8 years ago
parent
46904ee5d2 dd0df81ebd
commit
d04aebaec7
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7 changed files with 60 additions and 40 deletions
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  1. 16
      src/net_processing.cpp
  2. 4
      src/rpc/blockchain.cpp
  3. 8
      src/rpc/mining.cpp
  4. 3
      src/test/miner_tests.cpp
  5. 3
      src/test/test_bitcoin.cpp
  6. 62
      src/validation.cpp
  7. 4
      src/validation.h

16
src/net_processing.cpp
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@ -1894,7 +1894,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
BlockTransactions resp; BlockTransactions resp;
vRecv >> resp; vRecv >> resp;
CBlock block; std::shared_ptr<CBlock> pblock = std::make_shared<CBlock>();
bool fBlockRead = false; bool fBlockRead = false;
{ {
LOCK(cs_main); LOCK(cs_main);
@ -1907,7 +1907,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
} }
PartiallyDownloadedBlock& partialBlock = *it->second.second->partialBlock; 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) { if (status == READ_STATUS_INVALID) {
MarkBlockAsReceived(resp.blockhash); // Reset in-flight state in case of whitelist MarkBlockAsReceived(resp.blockhash); // Reset in-flight state in case of whitelist
Misbehaving(pfrom->GetId(), 100); Misbehaving(pfrom->GetId(), 100);
@ -1950,7 +1950,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
bool fNewBlock = false; bool fNewBlock = false;
// Since we requested this block (it was in mapBlocksInFlight), force it to be processed, // 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) // 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) if (fNewBlock)
pfrom->nLastBlockTime = GetTime(); 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 else if (strCommand == NetMsgType::BLOCK && !fImporting && !fReindex) // Ignore blocks received while importing
{ {
CBlock block; std::shared_ptr<CBlock> pblock = std::make_shared<CBlock>();
vRecv >> block; 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, // Process all blocks from whitelisted peers, even if not requested,
// unless we're still syncing with the network. // unless we're still syncing with the network.
// Such an unrequested block may still be processed, subject to the // Such an unrequested block may still be processed, subject to the
// conditions in AcceptBlock(). // conditions in AcceptBlock().
bool forceProcessing = pfrom->fWhitelisted && !IsInitialBlockDownload(); bool forceProcessing = pfrom->fWhitelisted && !IsInitialBlockDownload();
const uint256 hash(block.GetHash()); const uint256 hash(pblock->GetHash());
{ {
LOCK(cs_main); LOCK(cs_main);
// Also always process if we requested the block explicitly, as we may // 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)); mapBlockSource.emplace(hash, std::make_pair(pfrom->GetId(), true));
} }
bool fNewBlock = false; bool fNewBlock = false;
ProcessNewBlock(chainparams, &block, forceProcessing, NULL, &fNewBlock); ProcessNewBlock(chainparams, pblock, forceProcessing, NULL, &fNewBlock);
if (fNewBlock) if (fNewBlock)
pfrom->nLastBlockTime = GetTime(); pfrom->nLastBlockTime = GetTime();
} }

4
src/rpc/blockchain.cpp
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@ -1319,7 +1319,7 @@ UniValue invalidateblock(const JSONRPCRequest& request)
} }
if (state.IsValid()) { if (state.IsValid()) {
ActivateBestChain(state, Params(), NULL); ActivateBestChain(state, Params());
} }
if (!state.IsValid()) { if (!state.IsValid()) {
@ -1357,7 +1357,7 @@ UniValue reconsiderblock(const JSONRPCRequest& request)
} }
CValidationState state; CValidationState state;
ActivateBestChain(state, Params(), NULL); ActivateBestChain(state, Params());
if (!state.IsValid()) { if (!state.IsValid()) {
throw JSONRPCError(RPC_DATABASE_ERROR, state.GetRejectReason()); throw JSONRPCError(RPC_DATABASE_ERROR, state.GetRejectReason());

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

3
src/test/miner_tests.cpp
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@ -223,7 +223,8 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
txFirst.push_back(pblock->vtx[0]); txFirst.push_back(pblock->vtx[0]);
pblock->hashMerkleRoot = BlockMerkleRoot(*pblock); pblock->hashMerkleRoot = BlockMerkleRoot(*pblock);
pblock->nNonce = blockinfo[i].nonce; 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(); pblock->hashPrevBlock = pblock->GetHash();
} }

3
src/test/test_bitcoin.cpp
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@ -127,7 +127,8 @@ TestChain100Setup::CreateAndProcessBlock(const std::vector<CMutableTransaction>&
while (!CheckProofOfWork(block.GetHash(), block.nBits, chainparams.GetConsensus())) ++block.nNonce; 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; CBlock result = block;
return result; return result;

62
src/validation.cpp
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@ -2152,29 +2152,45 @@ static int64_t nTimeFlush = 0;
static int64_t nTimeChainState = 0; static int64_t nTimeChainState = 0;
static int64_t nTimePostConnect = 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 * 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. * 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()); assert(pindexNew->pprev == chainActive.Tip());
// Read block from disk. // Read block from disk.
int64_t nTime1 = GetTimeMicros(); int64_t nTime1 = GetTimeMicros();
CBlock block;
if (!pblock) { 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"); 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. // Apply the block atomically to the chain state.
int64_t nTime2 = GetTimeMicros(); nTimeReadFromDisk += nTime2 - nTime1; int64_t nTime2 = GetTimeMicros(); nTimeReadFromDisk += nTime2 - nTime1;
int64_t nTime3; int64_t nTime3;
LogPrint("bench", " - Load block from disk: %.2fms [%.2fs]\n", (nTime2 - nTime1) * 0.001, nTimeReadFromDisk * 0.000001); LogPrint("bench", " - Load block from disk: %.2fms [%.2fs]\n", (nTime2 - nTime1) * 0.001, nTimeReadFromDisk * 0.000001);
{ {
CCoinsViewCache view(pcoinsTip); CCoinsViewCache view(pcoinsTip);
bool rv = ConnectBlock(*pblock, state, pindexNew, view, chainparams); bool rv = ConnectBlock(blockConnecting, state, pindexNew, view, chainparams);
GetMainSignals().BlockChecked(*pblock, state); GetMainSignals().BlockChecked(blockConnecting, state);
if (!rv) { if (!rv) {
if (state.IsInvalid()) if (state.IsInvalid())
InvalidBlockFound(pindexNew, state); InvalidBlockFound(pindexNew, state);
@ -2192,13 +2208,10 @@ bool static ConnectTip(CValidationState& state, const CChainParams& chainparams,
int64_t nTime5 = GetTimeMicros(); nTimeChainState += nTime5 - nTime4; int64_t nTime5 = GetTimeMicros(); nTimeChainState += nTime5 - nTime4;
LogPrint("bench", " - Writing chainstate: %.2fms [%.2fs]\n", (nTime5 - nTime4) * 0.001, nTimeChainState * 0.000001); LogPrint("bench", " - Writing chainstate: %.2fms [%.2fs]\n", (nTime5 - nTime4) * 0.001, nTimeChainState * 0.000001);
// Remove conflicting transactions from the mempool.; // 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. // Update chainActive & related variables.
UpdateTip(pindexNew, chainparams); 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; 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 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); 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. * Try to make some progress towards making pindexMostWork the active block.
* pblock is either NULL or a pointer to a CBlock corresponding to pindexMostWork. * 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); AssertLockHeld(cs_main);
const CBlockIndex *pindexOldTip = chainActive.Tip(); const CBlockIndex *pindexOldTip = chainActive.Tip();
@ -2312,7 +2325,7 @@ static bool ActivateBestChainStep(CValidationState& state, const CChainParams& c
// Connect new blocks. // Connect new blocks.
BOOST_REVERSE_FOREACH(CBlockIndex *pindexConnect, vpindexToConnect) { 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()) { if (state.IsInvalid()) {
// The block violates a consensus rule. // The block violates a consensus rule.
if (!state.CorruptionPossible()) if (!state.CorruptionPossible())
@ -2320,6 +2333,8 @@ static bool ActivateBestChainStep(CValidationState& state, const CChainParams& c
state = CValidationState(); state = CValidationState();
fInvalidFound = true; fInvalidFound = true;
fContinue = false; fContinue = false;
// If we didn't actually connect the block, don't notify listeners about it
connectTrace.blocksConnected.pop_back();
break; break;
} else { } else {
// A system error occurred (disk space, database error, ...). // 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 * 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). * 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 *pindexMostWork = NULL;
CBlockIndex *pindexNewTip = NULL; CBlockIndex *pindexNewTip = NULL;
std::vector<std::tuple<CTransactionRef,CBlockIndex*,int>> txChanged;
if (pblock)
txChanged.reserve(pblock->vtx.size());
do { do {
txChanged.clear();
boost::this_thread::interruption_point(); boost::this_thread::interruption_point();
if (ShutdownRequested()) if (ShutdownRequested())
break; break;
const CBlockIndex *pindexFork; const CBlockIndex *pindexFork;
std::vector<CTransactionRef> txConflicted; ConnectTrace connectTrace;
bool fInitialDownload; bool fInitialDownload;
{ {
LOCK(cs_main); LOCK(cs_main);
@ -2404,7 +2415,8 @@ bool ActivateBestChain(CValidationState &state, const CChainParams& chainparams,
return true; return true;
bool fInvalidFound = false; 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; return false;
if (fInvalidFound) { if (fInvalidFound) {
@ -2421,13 +2433,17 @@ bool ActivateBestChain(CValidationState &state, const CChainParams& chainparams,
// throw all transactions though the signal-interface // throw all transactions though the signal-interface
// while _not_ holding the cs_main lock // 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); GetMainSignals().SyncTransaction(*tx, pindexNewTip, CMainSignals::SYNC_TRANSACTION_NOT_IN_BLOCK);
} }
// ... and about transactions that got confirmed: // ... and about transactions that got confirmed:
for (unsigned int i = 0; i < txChanged.size(); i++) for (const auto& pair : connectTrace.blocksConnected) {
GetMainSignals().SyncTransaction(*std::get<0>(txChanged[i]), std::get<1>(txChanged[i]), std::get<2>(txChanged[i])); 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. // Notify external listeners about the new tip.
GetMainSignals().UpdatedBlockTip(pindexNewTip, pindexFork, fInitialDownload); GetMainSignals().UpdatedBlockTip(pindexNewTip, pindexFork, fInitialDownload);
@ -3112,7 +3128,7 @@ static bool AcceptBlock(const CBlock& block, CValidationState& state, const CCha
return true; 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); LOCK(cs_main);

4
src/validation.h
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@ -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 * @param[out] fNewBlock A boolean which is set to indicate if the block was first received via this call
* @return True if state.IsValid() * @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. * 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) */ /** 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); 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 */ /** 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); CAmount GetBlockSubsidy(int nHeight, const Consensus::Params& consensusParams);
/** /**

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