src/bench/mempool_eviction.cpp

   1 // Copyright (c) 2011-2016 The Bitcoin Core developers
   2 // Distributed under the MIT software license, see the accompanying
   3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4
   5 #include "bench.h"
   6 #include "policy/policy.h"
   7 #include "txmempool.h"
   8
   9 #include <list>
  10 #include <vector>
  11
  12 static void AddTx(const CTransaction& tx, const CAmount& nFee, CTxMemPool& pool)
  13 {
  14     int64_t nTime = 0;
  15     unsigned int nHeight = 1;
  16     bool spendsCoinbase = false;
  17     unsigned int sigOpCost = 4;
  18     LockPoints lp;
  19     pool.addUnchecked(tx.GetHash(), CTxMemPoolEntry(
  20                                         MakeTransactionRef(tx), nFee, nTime, nHeight,
  21                                         spendsCoinbase, sigOpCost, lp));
  22 }
  23
  24 // Right now this is only testing eviction performance in an extremely small
  25 // mempool. Code needs to be written to generate a much wider variety of
  26 // unique transactions for a more meaningful performance measurement.
  27 static void MempoolEviction(benchmark::State& state)
  28 {
  29     CMutableTransaction tx1 = CMutableTransaction();
  30     tx1.vin.resize(1);
  31     tx1.vin[0].scriptSig = CScript() << OP_1;
  32     tx1.vout.resize(1);
  33     tx1.vout[0].scriptPubKey = CScript() << OP_1 << OP_EQUAL;
  34     tx1.vout[0].nValue = 10 * COIN;
  35
  36     CMutableTransaction tx2 = CMutableTransaction();
  37     tx2.vin.resize(1);
  38     tx2.vin[0].scriptSig = CScript() << OP_2;
  39     tx2.vout.resize(1);
  40     tx2.vout[0].scriptPubKey = CScript() << OP_2 << OP_EQUAL;
  41     tx2.vout[0].nValue = 10 * COIN;
  42
  43     CMutableTransaction tx3 = CMutableTransaction();
  44     tx3.vin.resize(1);
  45     tx3.vin[0].prevout = COutPoint(tx2.GetHash(), 0);
  46     tx3.vin[0].scriptSig = CScript() << OP_2;
  47     tx3.vout.resize(1);
  48     tx3.vout[0].scriptPubKey = CScript() << OP_3 << OP_EQUAL;
  49     tx3.vout[0].nValue = 10 * COIN;
  50
  51     CMutableTransaction tx4 = CMutableTransaction();
  52     tx4.vin.resize(2);
  53     tx4.vin[0].prevout.SetNull();
  54     tx4.vin[0].scriptSig = CScript() << OP_4;
  55     tx4.vin[1].prevout.SetNull();
  56     tx4.vin[1].scriptSig = CScript() << OP_4;
  57     tx4.vout.resize(2);
  58     tx4.vout[0].scriptPubKey = CScript() << OP_4 << OP_EQUAL;
  59     tx4.vout[0].nValue = 10 * COIN;
  60     tx4.vout[1].scriptPubKey = CScript() << OP_4 << OP_EQUAL;
  61     tx4.vout[1].nValue = 10 * COIN;
  62
  63     CMutableTransaction tx5 = CMutableTransaction();
  64     tx5.vin.resize(2);
  65     tx5.vin[0].prevout = COutPoint(tx4.GetHash(), 0);
  66     tx5.vin[0].scriptSig = CScript() << OP_4;
  67     tx5.vin[1].prevout.SetNull();
  68     tx5.vin[1].scriptSig = CScript() << OP_5;
  69     tx5.vout.resize(2);
  70     tx5.vout[0].scriptPubKey = CScript() << OP_5 << OP_EQUAL;
  71     tx5.vout[0].nValue = 10 * COIN;
  72     tx5.vout[1].scriptPubKey = CScript() << OP_5 << OP_EQUAL;
  73     tx5.vout[1].nValue = 10 * COIN;
  74
  75     CMutableTransaction tx6 = CMutableTransaction();
  76     tx6.vin.resize(2);
  77     tx6.vin[0].prevout = COutPoint(tx4.GetHash(), 1);
  78     tx6.vin[0].scriptSig = CScript() << OP_4;
  79     tx6.vin[1].prevout.SetNull();
  80     tx6.vin[1].scriptSig = CScript() << OP_6;
  81     tx6.vout.resize(2);
  82     tx6.vout[0].scriptPubKey = CScript() << OP_6 << OP_EQUAL;
  83     tx6.vout[0].nValue = 10 * COIN;
  84     tx6.vout[1].scriptPubKey = CScript() << OP_6 << OP_EQUAL;
  85     tx6.vout[1].nValue = 10 * COIN;
  86
  87     CMutableTransaction tx7 = CMutableTransaction();
  88     tx7.vin.resize(2);
  89     tx7.vin[0].prevout = COutPoint(tx5.GetHash(), 0);
  90     tx7.vin[0].scriptSig = CScript() << OP_5;
  91     tx7.vin[1].prevout = COutPoint(tx6.GetHash(), 0);
  92     tx7.vin[1].scriptSig = CScript() << OP_6;
  93     tx7.vout.resize(2);
  94     tx7.vout[0].scriptPubKey = CScript() << OP_7 << OP_EQUAL;
  95     tx7.vout[0].nValue = 10 * COIN;
  96     tx7.vout[1].scriptPubKey = CScript() << OP_7 << OP_EQUAL;
  97     tx7.vout[1].nValue = 10 * COIN;
  98
  99     CTxMemPool pool;
 100
 101     while (state.KeepRunning()) {
 102         AddTx(tx1, 10000LL, pool);
 103         AddTx(tx2, 5000LL, pool);
 104         AddTx(tx3, 20000LL, pool);
 105         AddTx(tx4, 7000LL, pool);
 106         AddTx(tx5, 1000LL, pool);
 107         AddTx(tx6, 1100LL, pool);
 108         AddTx(tx7, 9000LL, pool);
 109         pool.TrimToSize(pool.DynamicMemoryUsage() * 3 / 4);
 110         pool.TrimToSize(GetVirtualTransactionSize(tx1));
 111     }
 112 }
 113
 114 BENCHMARK(MempoolEviction);