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Merge pull request #6776

ab1f560 Support -checkmempool=N, which runs checks on average once every N transactions (Pieter Wuille)
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sipa committed Oct 28, 2015
2 parents 8756c98 + ab1f560 commit e06c14fb59ee493da5283819420d949a14304ca7
Showing with 12 additions and 6 deletions.
  1. +4 −1 src/init.cpp
  2. +6 −3 src/txmempool.cpp
  3. +2 −2 src/txmempool.h
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@@ -841,7 +841,10 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
InitWarning(_("Warning: Unsupported argument -benchmark ignored, use -debug=bench."));
// Checkmempool and checkblockindex default to true in regtest mode
- mempool.setSanityCheck(GetBoolArg("-checkmempool", chainparams.DefaultConsistencyChecks()));
+ int ratio = std::min<int>(std::max<int>(GetArg("-checkmempool", chainparams.DefaultConsistencyChecks() ? 1 : 0), 0), 1000000);
+ if (ratio != 0) {
+ mempool.setSanityCheck(1.0 / ratio);
+ }
fCheckBlockIndex = GetBoolArg("-checkblockindex", chainparams.DefaultConsistencyChecks());
fCheckpointsEnabled = GetBoolArg("-checkpoints", true);
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@@ -314,7 +314,7 @@ CTxMemPool::CTxMemPool(const CFeeRate& _minReasonableRelayFee) :
// Sanity checks off by default for performance, because otherwise
// accepting transactions becomes O(N^2) where N is the number
// of transactions in the pool
- fSanityCheck = false;
+ nCheckFrequency = 0;
minerPolicyEstimator = new CBlockPolicyEstimator(_minReasonableRelayFee);
minReasonableRelayFee = _minReasonableRelayFee;
@@ -487,7 +487,7 @@ void CTxMemPool::removeCoinbaseSpends(const CCoinsViewCache *pcoins, unsigned in
if (it2 != mapTx.end())
continue;
const CCoins *coins = pcoins->AccessCoins(txin.prevout.hash);
- if (fSanityCheck) assert(coins);
+ if (nCheckFrequency != 0) assert(coins);
if (!coins || (coins->IsCoinBase() && ((signed long)nMemPoolHeight) - coins->nHeight < COINBASE_MATURITY)) {
transactionsToRemove.push_back(tx);
break;
@@ -568,7 +568,10 @@ void CTxMemPool::clear()
void CTxMemPool::check(const CCoinsViewCache *pcoins) const
{
- if (!fSanityCheck)
+ if (nCheckFrequency == 0)
+ return;
+
+ if (insecure_rand() >= nCheckFrequency)
return;
LogPrint("mempool", "Checking mempool with %u transactions and %u inputs\n", (unsigned int)mapTx.size(), (unsigned int)mapNextTx.size());
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@@ -278,7 +278,7 @@ class CInPoint
class CTxMemPool
{
private:
- bool fSanityCheck; //! Normally false, true if -checkmempool or -regtest
+ uint32_t nCheckFrequency; //! Value n means that n times in 2^32 we check.
unsigned int nTransactionsUpdated;
CBlockPolicyEstimator* minerPolicyEstimator;
@@ -360,7 +360,7 @@ class CTxMemPool
* check does nothing.
*/
void check(const CCoinsViewCache *pcoins) const;
- void setSanityCheck(bool _fSanityCheck) { fSanityCheck = _fSanityCheck; }
+ void setSanityCheck(double dFrequency = 1.0) { nCheckFrequency = dFrequency * 4294967296.0; }
// addUnchecked must updated state for all ancestors of a given transaction,
// to track size/count of descendant transactions. First version of

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