diff options
| -rw-r--r-- | src/miner.cpp | 40 | ||||
| -rw-r--r-- | src/miner.h | 11 |
2 files changed, 43 insertions, 8 deletions
diff --git a/src/miner.cpp b/src/miner.cpp index 7b3d94d0e4..a12dcec2ce 100644 --- a/src/miner.cpp +++ b/src/miner.cpp @@ -129,6 +129,8 @@ void BlockAssembler::resetBlock() std::unique_ptr<CBlockTemplate> BlockAssembler::CreateNewBlock(const CScript& scriptPubKeyIn, bool fMineWitnessTx) { + int64_t nTimeStart = GetTimeMicros(); + resetBlock(); pblocktemplate.reset(new CBlockTemplate()); @@ -168,7 +170,11 @@ std::unique_ptr<CBlockTemplate> BlockAssembler::CreateNewBlock(const CScript& sc fIncludeWitness = IsWitnessEnabled(pindexPrev, chainparams.GetConsensus()) && fMineWitnessTx; addPriorityTxs(); - addPackageTxs(); + int nPackagesSelected = 0; + int nDescendantsUpdated = 0; + addPackageTxs(nPackagesSelected, nDescendantsUpdated); + + int64_t nTime1 = GetTimeMicros(); nLastBlockTx = nBlockTx; nLastBlockSize = nBlockSize; @@ -200,6 +206,9 @@ std::unique_ptr<CBlockTemplate> BlockAssembler::CreateNewBlock(const CScript& sc if (!TestBlockValidity(state, chainparams, *pblock, pindexPrev, false, false)) { throw std::runtime_error(strprintf("%s: TestBlockValidity failed: %s", __func__, FormatStateMessage(state))); } + int64_t nTime2 = GetTimeMicros(); + + LogPrint("bench", "CreateNewBlock() packages: %.2fms (%d packages, %d updated descendants), validity: %.2fms (total %.2fms)\n", 0.001 * (nTime1 - nTimeStart), nPackagesSelected, nDescendantsUpdated, 0.001 * (nTime2 - nTime1), 0.001 * (nTime2 - nTimeStart)); return std::move(pblocktemplate); } @@ -340,9 +349,10 @@ void BlockAssembler::AddToBlock(CTxMemPool::txiter iter) } } -void BlockAssembler::UpdatePackagesForAdded(const CTxMemPool::setEntries& alreadyAdded, +int BlockAssembler::UpdatePackagesForAdded(const CTxMemPool::setEntries& alreadyAdded, indexed_modified_transaction_set &mapModifiedTx) { + int nDescendantsUpdated = 0; BOOST_FOREACH(const CTxMemPool::txiter it, alreadyAdded) { CTxMemPool::setEntries descendants; mempool.CalculateDescendants(it, descendants); @@ -350,6 +360,7 @@ void BlockAssembler::UpdatePackagesForAdded(const CTxMemPool::setEntries& alread BOOST_FOREACH(CTxMemPool::txiter desc, descendants) { if (alreadyAdded.count(desc)) continue; + ++nDescendantsUpdated; modtxiter mit = mapModifiedTx.find(desc); if (mit == mapModifiedTx.end()) { CTxMemPoolModifiedEntry modEntry(desc); @@ -362,6 +373,7 @@ void BlockAssembler::UpdatePackagesForAdded(const CTxMemPool::setEntries& alread } } } + return nDescendantsUpdated; } // Skip entries in mapTx that are already in a block or are present @@ -402,7 +414,7 @@ void BlockAssembler::SortForBlock(const CTxMemPool::setEntries& package, CTxMemP // Each time through the loop, we compare the best transaction in // mapModifiedTxs with the next transaction in the mempool to decide what // transaction package to work on next. -void BlockAssembler::addPackageTxs() +void BlockAssembler::addPackageTxs(int &nPackagesSelected, int &nDescendantsUpdated) { // mapModifiedTx will store sorted packages after they are modified // because some of their txs are already in the block @@ -416,6 +428,13 @@ void BlockAssembler::addPackageTxs() CTxMemPool::indexed_transaction_set::index<ancestor_score>::type::iterator mi = mempool.mapTx.get<ancestor_score>().begin(); CTxMemPool::txiter iter; + + // Limit the number of attempts to add transactions to the block when it is + // close to full; this is just a simple heuristic to finish quickly if the + // mempool has a lot of entries. + const int64_t MAX_CONSECUTIVE_FAILURES = 1000; + int64_t nConsecutiveFailed = 0; + while (mi != mempool.mapTx.get<ancestor_score>().end() || !mapModifiedTx.empty()) { // First try to find a new transaction in mapTx to evaluate. @@ -477,6 +496,14 @@ void BlockAssembler::addPackageTxs() mapModifiedTx.get<ancestor_score>().erase(modit); failedTx.insert(iter); } + + ++nConsecutiveFailed; + + if (nConsecutiveFailed > MAX_CONSECUTIVE_FAILURES && nBlockWeight > + nBlockMaxWeight - 4000) { + // Give up if we're close to full and haven't succeeded in a while + break; + } continue; } @@ -497,6 +524,9 @@ void BlockAssembler::addPackageTxs() continue; } + // This transaction will make it in; reset the failed counter. + nConsecutiveFailed = 0; + // Package can be added. Sort the entries in a valid order. std::vector<CTxMemPool::txiter> sortedEntries; SortForBlock(ancestors, iter, sortedEntries); @@ -507,8 +537,10 @@ void BlockAssembler::addPackageTxs() mapModifiedTx.erase(sortedEntries[i]); } + ++nPackagesSelected; + // Update transactions that depend on each of these - UpdatePackagesForAdded(ancestors, mapModifiedTx); + nDescendantsUpdated += UpdatePackagesForAdded(ancestors, mapModifiedTx); } } diff --git a/src/miner.h b/src/miner.h index 29013c3bcc..9ae2874927 100644 --- a/src/miner.h +++ b/src/miner.h @@ -177,8 +177,10 @@ private: // Methods for how to add transactions to a block. /** Add transactions based on tx "priority" */ void addPriorityTxs(); - /** Add transactions based on feerate including unconfirmed ancestors */ - void addPackageTxs(); + /** Add transactions based on feerate including unconfirmed ancestors + * Increments nPackagesSelected / nDescendantsUpdated with corresponding + * statistics from the package selection (for logging statistics). */ + void addPackageTxs(int &nPackagesSelected, int &nDescendantsUpdated); // helper function for addPriorityTxs /** Test if tx will still "fit" in the block */ @@ -202,8 +204,9 @@ private: /** Sort the package in an order that is valid to appear in a block */ void SortForBlock(const CTxMemPool::setEntries& package, CTxMemPool::txiter entry, std::vector<CTxMemPool::txiter>& sortedEntries); /** Add descendants of given transactions to mapModifiedTx with ancestor - * state updated assuming given transactions are inBlock. */ - void UpdatePackagesForAdded(const CTxMemPool::setEntries& alreadyAdded, indexed_modified_transaction_set &mapModifiedTx); + * state updated assuming given transactions are inBlock. Returns number + * of updated descendants. */ + int UpdatePackagesForAdded(const CTxMemPool::setEntries& alreadyAdded, indexed_modified_transaction_set &mapModifiedTx); }; /** Modify the extranonce in a block */ |