X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=src%2Fkernel.cpp;h=4cf5f43b2ecb13757dfe1a5e417212830df85d89;hb=ce7c49b9dc887c2bb6de6672c0a3d3987b430e18;hp=12b26aa72ba73795b77b2ea38345a900a73c33d0;hpb=2bc0f8cca250b65426f9fecf44d176dc1698f399;p=novacoin.git diff --git a/src/kernel.cpp b/src/kernel.cpp index 12b26aa..4cf5f43 100644 --- a/src/kernel.cpp +++ b/src/kernel.cpp @@ -1,4 +1,7 @@ // Copyright (c) 2012-2013 The PPCoin developers +// Copyright (c) 2013-2015 The Novacoin developers +// Distributed under the MIT/X11 software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. // Distributed under the MIT/X11 software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. @@ -32,6 +35,7 @@ static std::map mapStakeModifierCheckpoints = (143990, 0x9c592c78u ) (149000, 0x48f2bdc4u ) (160000, 0x789df0f0u ) + (200000, 0x01ec1503u ) ; // Hard checkpoints of stake modifiers to ensure they are deterministic (testNet) @@ -94,18 +98,6 @@ bool IsFixedModifierInterval(unsigned int nTimeBlock) return (nTimeBlock >= (fTestNet? nModifierTestSwitchTime : nModifierSwitchTime)); } -// Get time weight -int64_t GetWeight(int64_t nIntervalBeginning, int64_t nIntervalEnd) -{ - // Kernel hash weight starts from 0 at the 30-day min age - // this change increases active coins participating the hash and helps - // to secure the network when proof-of-stake difficulty is low - // - // Maximum TimeWeight is 90 days. - - return min(nIntervalEnd - nIntervalBeginning - nStakeMinAge, (int64_t)nStakeMaxAge); -} - // Get the last stake modifier and its generation time from a given block static bool GetLastStakeModifier(const CBlockIndex* pindex, uint64_t& nStakeModifier, int64_t& nModifierTime) { @@ -388,7 +380,7 @@ bool CheckStakeKernelHash(uint32_t nBits, const CBlock& blockFrom, uint32_t nTxP uint256 hashBlockFrom = blockFrom.GetHash(); - CBigNum bnCoinDayWeight = CBigNum(nValueIn) * GetWeight((int64_t)txPrev.nTime, (int64_t)nTimeTx) / COIN / (24 * 60 * 60); + CBigNum bnCoinDayWeight = CBigNum(nValueIn) * GetWeight((int64_t)txPrev.nTime, (int64_t)nTimeTx) / COIN / nOneDay; targetProofOfStake = (bnCoinDayWeight * bnTargetPerCoinDay).getuint256(); // Calculate hash @@ -410,10 +402,10 @@ bool CheckStakeKernelHash(uint32_t nBits, const CBlock& blockFrom, uint32_t nTxP DateTimeStrFormat(nStakeModifierTime).c_str(), mapBlockIndex[hashBlockFrom]->nHeight, DateTimeStrFormat(blockFrom.GetBlockTime()).c_str()); - printf("CheckStakeKernelHash() : check modifier=0x%016" PRIx64 " nTimeBlockFrom=%u nTxPrevOffset=%u nTimeTxPrev=%u nPrevout=%u nTimeTx=%u hashProof=%s\n", + printf("CheckStakeKernelHash() : check modifier=0x%016" PRIx64 " nTimeBlockFrom=%u nTxPrevOffset=%u nTimeTxPrev=%u nPrevout=%u nTimeTx=%u hashTarget=%s hashProof=%s\n", nStakeModifier, nTimeBlockFrom, nTxPrevOffset, txPrev.nTime, prevout.n, nTimeTx, - hashProofOfStake.ToString().c_str()); + targetProofOfStake.ToString().c_str(), hashProofOfStake.ToString().c_str()); } // Now check if proof-of-stake hash meets target protocol @@ -426,119 +418,347 @@ bool CheckStakeKernelHash(uint32_t nBits, const CBlock& blockFrom, uint32_t nTxP DateTimeStrFormat(nStakeModifierTime).c_str(), mapBlockIndex[hashBlockFrom]->nHeight, DateTimeStrFormat(blockFrom.GetBlockTime()).c_str()); - printf("CheckStakeKernelHash() : pass modifier=0x%016" PRIx64 " nTimeBlockFrom=%u nTxPrevOffset=%u nTimeTxPrev=%u nPrevout=%u nTimeTx=%u hashProof=%s\n", + printf("CheckStakeKernelHash() : pass modifier=0x%016" PRIx64 " nTimeBlockFrom=%u nTxPrevOffset=%u nTimeTxPrev=%u nPrevout=%u nTimeTx=%u hashTarget=%s hashProof=%s\n", nStakeModifier, nTimeBlockFrom, nTxPrevOffset, txPrev.nTime, prevout.n, nTimeTx, - hashProofOfStake.ToString().c_str()); + targetProofOfStake.ToString().c_str(), hashProofOfStake.ToString().c_str()); } return true; } -// Scan given coins set for kernel solution -bool ScanForStakeKernelHash(MetaMap &mapMeta, uint32_t nBits, uint32_t nTime, uint32_t nSearchInterval, CoinsSet::value_type &kernelcoin, uint32_t &nTimeTx, uint32_t &nBlockTime, uint64_t &nKernelsTried, uint64_t &nCoinDaysTried) + +#ifdef USE_ASM + +// kernel padding +static const uint32_t block1_suffix[9] = { 0x80000000, 0, 0, 0, 0, 0, 0, 0, 0xe0000000 }; +static const uint32_t block1_suffix_4way[4 * 9] = { + 0x00000080, 0x00000080, 0x00000080, 0x00000080, + 0, 0, 0, 0, + 0, 0, 0, 0, + 0, 0, 0, 0, + 0, 0, 0, 0, + 0, 0, 0, 0, + 0, 0, 0, 0, + 0, 0, 0, 0, + 0xe0000000, 0xe0000000, 0xe0000000, 0xe0000000 +}; + +// hash padding +static const uint32_t block2_suffix[8] = { 0x80000000, 0, 0, 0, 0, 0, 0, 0x00010000 }; +static const uint32_t block2_suffix_4way[4 * 8] = { + 0x00000080, 0x00000080, 0x00000080, 0x00000080, + 0, 0, 0, 0, + 0, 0, 0, 0, + 0, 0, 0, 0, + 0, 0, 0, 0, + 0, 0, 0, 0, + 0, 0, 0, 0, + 0x00010000, 0x00010000, 0x00010000, 0x00010000 +}; + +extern "C" int sha256_use_4way(); +extern "C" void sha256_init(uint32_t *state); +extern "C" void sha256_transform(uint32_t *state, const uint32_t *block, int swap); +extern "C" void sha256_init_4way(uint32_t *state); +extern "C" void sha256_transform_4way(uint32_t *state, const uint32_t *block, int swap); +extern "C" void copy_swap_hashes(uint32_t *blocks, uint32_t *state); // Generic block copy function + +#ifdef USE_SSSE3 +extern "C" int sha256_use_ssse3(); +extern "C" void copy_swap_hashes_ssse3(uint32_t *blocks, uint32_t *state); // SSSE3 optimized block copy function + +void (*copy_swap)(uint32_t *, uint32_t *) = (sha256_use_ssse3() != 0) ? ©_swap_hashes_ssse3 : copy_swap_hashes; +#else +void (*copy_swap)(uint32_t *, uint32_t *) = ©_swap_hashes; +#endif + +bool fUse4Way = sha256_use_4way() != 0; + +class ScanMidstateWorker { - uint256 hashProofOfStake = 0; +public: + ScanMidstateWorker() + { } + ScanMidstateWorker(unsigned char *kernel, uint32_t nBits, uint32_t nInputTxTime, int64_t nValueIn, uint32_t nIntervalBegin, uint32_t nIntervalEnd) + : kernel(kernel), nBits(nBits), nInputTxTime(nInputTxTime), bnValueIn(nValueIn), nIntervalBegin(nIntervalBegin), nIntervalEnd(nIntervalEnd) + { + solutions = vector >(); + } - // (txid, vout.n) => ((txindex, (tx, vout.n)), (block, modifier)) - for(MetaMap::const_iterator meta_item = mapMeta.begin(); meta_item != mapMeta.end(); meta_item++) + void Do_4way() { - if (!fCoinsDataActual) - break; + SetThreadPriority(THREAD_PRIORITY_LOWEST); - CTxIndex txindex = (*meta_item).second.first.first; - CBlock block = (*meta_item).second.second.first; - uint64_t nStakeModifier = (*meta_item).second.second.second; + // Compute maximum possible target to filter out majority of obviously insufficient hashes + CBigNum bnTargetPerCoinDay; + bnTargetPerCoinDay.SetCompact(nBits); + uint256 nMaxTarget = (bnTargetPerCoinDay * bnValueIn * nStakeMaxAge / COIN / nOneDay).getuint256(); - // Get coin - CoinsSet::value_type pcoin = meta_item->second.first.second; + uint32_t state1[4 * 8] __attribute__((aligned(16))); + uint32_t state2[4 * 8] __attribute__((aligned(16))); + uint32_t blocks1[4 * 16] __attribute__((aligned(16))); + uint32_t blocks2[4 * 16] __attribute__((aligned(16))); - static unsigned int nMaxStakeSearchInterval = 60; + vector vRow = vector(4); + uint32_t *pnKernel = (uint32_t *) kernel; - // only count coins meeting min age requirement - if (nStakeMinAge + block.nTime > nTime - nMaxStakeSearchInterval) - continue; + for(int i = 0; i < 7; i++) + { + uint32_t nVal = pnKernel[i]; + fill(vRow.begin(), vRow.end(), nVal); - // Transaction offset inside block - uint32_t nTxOffset = txindex.pos.nTxPos - txindex.pos.nBlockPos; + for (int j = 0; j < 4; j++) + { + memcpy(&blocks1[i*4], &vRow[0], 16); + } + } - // Current timestamp scanning interval - unsigned int nCurrentSearchInterval = min(nSearchInterval, nMaxStakeSearchInterval); + memcpy(&blocks1[28], &block1_suffix_4way[0], 36*4); // sha256 padding + memcpy(&blocks2[32], &block2_suffix_4way[0], 32*4); - nBlockTime = block.nTime; + // Search forward in time from the given timestamp + // Stopping search in case of shutting down + for (uint32_t nTimeTx=nIntervalBegin, nMaxTarget32 = nMaxTarget.Get32(7); nTimeTx= CBigNum(nHashProofOfStake)) + solutions.push_back(std::pair(nHashProofOfStake, nTime)); + } + } + } + } + + void Do_generic() + { + SetThreadPriority(THREAD_PRIORITY_LOWEST); + + // Init new sha256 context and update it + // with first 24 bytes of kernel + SHA256_CTX workerCtx; + SHA256_Init(&workerCtx); + SHA256_Update(&workerCtx, kernel, 8 + 16); + SHA256_CTX ctx = workerCtx; + + // Sha256 result buffer + uint32_t hashProofOfStake[8]; + + // Compute maximum possible target to filter out majority of obviously insufficient hashes CBigNum bnTargetPerCoinDay; bnTargetPerCoinDay.SetCompact(nBits); - int64_t nValueIn = pcoin.first->vout[pcoin.second].nValue; - // Search backward in time from the given timestamp - // Search nSearchInterval seconds back up to nMaxStakeSearchInterval - // Stopping search in case of shutting down or cache invalidation - for (unsigned int n=0; nnTime, (int64_t)nTimeTx) / COIN / (24 * 60 * 60); + // Complete first hashing iteration + uint256 hash1; + SHA256_Update(&ctx, (unsigned char*)&nTimeTx, 4); + SHA256_Final((unsigned char*)&hash1, &ctx); + + // Restore context + ctx = workerCtx; + + // Finally, calculate kernel hash + SHA256((unsigned char*)&hash1, sizeof(hashProofOfStake), (unsigned char*)&hashProofOfStake); + + // Skip if hash doesn't satisfy the maximum target + if (hashProofOfStake[7] > nMaxTarget32) + continue; + + CBigNum bnCoinDayWeight = bnValueIn * GetWeight((int64_t)nInputTxTime, (int64_t)nTimeTx) / COIN / nOneDay; CBigNum bnTargetProofOfStake = bnCoinDayWeight * bnTargetPerCoinDay; - // Build kernel - CDataStream ss(SER_GETHASH, 0); - ss << nStakeModifier; - ss << nBlockTime << nTxOffset << pcoin.first->nTime << pcoin.second << nTimeTx; + if (bnTargetProofOfStake >= CBigNum(*pnHashProofOfStake)) + solutions.push_back(std::pair(*pnHashProofOfStake, nTimeTx)); + } + } + + void Do() + { + if (fUse4Way) + Do_4way(); + else + Do_generic(); + } - // Calculate kernel hash - hashProofOfStake = Hash(ss.begin(), ss.end()); + vector >& GetSolutions() + { + return solutions; + } - // Update statistics - nKernelsTried += 1; - nCoinDaysTried += bnCoinDayWeight.getuint64(); +private: + std::vector > solutions; - if (bnTargetProofOfStake >= CBigNum(hashProofOfStake)) - { - if (fDebug) - printf("nStakeModifier=0x%016" PRIx64 ", nBlockTime=%u nTxOffset=%u nTxPrevTime=%u nVout=%u nTimeTx=%u hashProofOfStake=%s Success=true\n", - nStakeModifier, nBlockTime, nTxOffset, pcoin.first->nTime, pcoin.second, nTimeTx, hashProofOfStake.GetHex().c_str()); + uint8_t *kernel; + uint32_t nBits; + uint32_t nInputTxTime; + CBigNum bnValueIn; + uint32_t nIntervalBegin; + uint32_t nIntervalEnd; +}; - kernelcoin = pcoin; - return true; - } +#else +class ScanMidstateWorker +{ +public: + ScanMidstateWorker() + { } + ScanMidstateWorker(unsigned char *kernel, uint32_t nBits, uint32_t nInputTxTime, int64_t nValueIn, uint32_t nIntervalBegin, uint32_t nIntervalEnd) + : nBits(nBits), nInputTxTime(nInputTxTime), bnValueIn(nValueIn), nIntervalBegin(nIntervalBegin), nIntervalEnd(nIntervalEnd) + { + // Init new sha256 context and update it + // with first 24 bytes of kernel + SHA256_Init(&workerCtx); + SHA256_Update(&workerCtx, kernel, 8 + 16); + solutions = vector >(); + } - if (fDebug) - printf("nStakeModifier=0x%016" PRIx64 ", nBlockTime=%u nTxOffset=%u nTxPrevTime=%u nTxNumber=%u nTimeTx=%u hashProofOfStake=%s Success=false\n", - nStakeModifier, nBlockTime, nTxOffset, pcoin.first->nTime, pcoin.second, nTimeTx, hashProofOfStake.GetHex().c_str()); + void Do() + { + SetThreadPriority(THREAD_PRIORITY_LOWEST); + SHA256_CTX ctx = workerCtx; + + // Sha256 result buffer + uint32_t hashProofOfStake[8]; + + // Compute maximum possible target to filter out majority of obviously insufficient hashes + CBigNum bnTargetPerCoinDay; + bnTargetPerCoinDay.SetCompact(nBits); + + uint256 nMaxTarget = (bnTargetPerCoinDay * bnValueIn * nStakeMaxAge / COIN / nOneDay).getuint256(), + *pnHashProofOfStake = (uint256 *)&hashProofOfStake; + + // Search forward in time from the given timestamp + // Stopping search in case of shutting down + for (uint32_t nTimeTx=nIntervalBegin, nMaxTarget32 = nMaxTarget.Get32(7); nTimeTx nMaxTarget32) + continue; + + CBigNum bnCoinDayWeight = bnValueIn * GetWeight((int64_t)nInputTxTime, (int64_t)nTimeTx) / COIN / nOneDay; + CBigNum bnTargetProofOfStake = bnCoinDayWeight * bnTargetPerCoinDay; + + if (bnTargetProofOfStake >= CBigNum(*pnHashProofOfStake)) + solutions.push_back(std::pair(*pnHashProofOfStake, nTimeTx)); } } - return false; -} + vector >& GetSolutions() + { + return solutions; + } + +private: + SHA256_CTX workerCtx; + std::vector > solutions; + + uint32_t nBits; + uint32_t nInputTxTime; + CBigNum bnValueIn; + uint32_t nIntervalBegin; + uint32_t nIntervalEnd; +}; -// Precompute hashing state for static part of kernel -void GetKernelMidstate(uint64_t nStakeModifier, uint32_t nBlockTime, uint32_t nTxOffset, uint32_t nInputTxTime, uint32_t nOut, SHA256_CTX &ctx) +#endif +// Scan given kernel for solution +bool ScanKernelForward(unsigned char *kernel, uint32_t nBits, uint32_t nInputTxTime, int64_t nValueIn, std::pair &SearchInterval, std::vector > &solutions) { - // Build static part of kernel - CDataStream ssKernel(SER_GETHASH, 0); - ssKernel << nStakeModifier; - ssKernel << nBlockTime << nTxOffset << nInputTxTime << nOut; - CDataStream::const_iterator it = ssKernel.begin(); - - // Init sha256 context and update it - // with first 24 bytes of kernel - SHA256_Init(&ctx); - SHA256_Update(&ctx, (unsigned char*)&it[0], 8 + 16); + // TODO: custom threads amount + + uint32_t nThreads = boost::thread::hardware_concurrency(); + uint32_t nPart = (SearchInterval.second - SearchInterval.first) / nThreads; + + + ScanMidstateWorker *workers = new ScanMidstateWorker[nThreads]; + + boost::thread_group group; + for(size_t i = 0; i < nThreads; i++) + { + uint32_t nBegin = SearchInterval.first + nPart * i; + uint32_t nEnd = SearchInterval.first + nPart * (i + 1); + workers[i] = ScanMidstateWorker(kernel, nBits, nInputTxTime, nValueIn, nBegin, nEnd); + boost::function workerFnc = boost::bind(&ScanMidstateWorker::Do, &workers[i]); + group.create_thread(workerFnc); + } + + group.join_all(); + solutions.clear(); + + for(size_t i = 0; i < nThreads; i++) + { + std::vector > ws = workers[i].GetSolutions(); + solutions.insert(solutions.end(), ws.begin(), ws.end()); + } + + delete [] workers; + + if (solutions.size() == 0) + { + // no solutions + return false; + } + + return true; } // Scan given midstate for solution -bool ScanMidstateForward(SHA256_CTX &ctx, uint32_t nBits, uint32_t nInputTxTime, int64_t nValueIn, std::pair &SearchInterval, std::pair &solution) +bool ScanContextBackward(SHA256_CTX &ctx, uint32_t nBits, uint32_t nInputTxTime, int64_t nValueIn, std::pair &SearchInterval, std::pair &solution) { CBigNum bnTargetPerCoinDay; bnTargetPerCoinDay.SetCompact(nBits); // Get maximum possible target to filter out the majority of obviously insufficient hashes - CBigNum bnMaxTargetPerCoinDay = bnTargetPerCoinDay * CBigNum(nValueIn) * nStakeMaxAge / COIN / (24 * 60 * 60); + CBigNum bnMaxTargetPerCoinDay = bnTargetPerCoinDay * CBigNum(nValueIn) * nStakeMaxAge / COIN / nOneDay; uint256 maxTarget = bnMaxTargetPerCoinDay.getuint256(); SHA256_CTX ctxCopy = ctx; - // Search forward in time from the given timestamp + // Search backward in time from the given timestamp // Stopping search in case of shutting down - for (uint32_t nTimeTx=SearchInterval.first; nTimeTxSearchInterval.second && !fShutdown; nTimeTx--) { // Complete first hashing iteration uint256 hash1; @@ -556,7 +776,7 @@ bool ScanMidstateForward(SHA256_CTX &ctx, uint32_t nBits, uint32_t nInputTxTime, if (hashProofOfStake > maxTarget) continue; - CBigNum bnCoinDayWeight = CBigNum(nValueIn) * GetWeight((int64_t)nInputTxTime, (int64_t)nTimeTx) / COIN / (24 * 60 * 60); + CBigNum bnCoinDayWeight = CBigNum(nValueIn) * GetWeight((int64_t)nInputTxTime, (int64_t)nTimeTx) / COIN / nOneDay; CBigNum bnTargetProofOfStake = bnCoinDayWeight * bnTargetPerCoinDay; if (bnTargetProofOfStake >= CBigNum(hashProofOfStake)) @@ -617,7 +837,7 @@ uint32_t GetStakeModifierChecksum(const CBlockIndex* pindex) ss << pindex->nFlags << pindex->hashProofOfStake << pindex->nStakeModifier; uint256 hashChecksum = Hash(ss.begin(), ss.end()); hashChecksum >>= (256 - 32); - return hashChecksum.Get64(); + return static_cast(hashChecksum.Get64()); } // Check stake modifier hard checkpoints