Bitcoin ABC  0.22.13
P2P Digital Currency
checkqueue.cpp
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1 // Copyright (c) 2015 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/bench.h>
6 #include <checkqueue.h>
7 #include <key.h>
8 #include <prevector.h>
9 #include <pubkey.h>
10 #include <random.h>
11 #include <util/system.h>
12 
13 #include <boost/thread/thread.hpp>
14 
15 #include <vector>
16 
17 static const int MIN_CORES = 2;
18 static const size_t BATCHES = 101;
19 static const size_t BATCH_SIZE = 30;
20 static const int PREVECTOR_SIZE = 28;
21 static const size_t QUEUE_BATCH_SIZE = 128;
22 
23 // This Benchmark tests the CheckQueue with a slightly realistic workload, where
24 // checks all contain a prevector that is indirect 50% of the time and there is
25 // a little bit of work done between calls to Add.
27  const ECCVerifyHandle verify_handle;
28  ECC_Start();
29 
30  struct PrevectorJob {
32  PrevectorJob() {}
33  explicit PrevectorJob(FastRandomContext &insecure_rand) {
34  p.resize(insecure_rand.randrange(PREVECTOR_SIZE * 2));
35  }
36  bool operator()() { return true; }
37  void swap(PrevectorJob &x) { p.swap(x.p); };
38  };
40  boost::thread_group tg;
41  for (auto x = 0; x < std::max(MIN_CORES, GetNumCores()); ++x) {
42  tg.create_thread([&] { queue.Thread(); });
43  }
44  while (state.KeepRunning()) {
45  // Make insecure_rand here so that each iteration is identical.
46  FastRandomContext insecure_rand(true);
47  CCheckQueueControl<PrevectorJob> control(&queue);
48  std::vector<std::vector<PrevectorJob>> vBatches(BATCHES);
49  for (auto &vChecks : vBatches) {
50  vChecks.reserve(BATCH_SIZE);
51  for (size_t x = 0; x < BATCH_SIZE; ++x) {
52  vChecks.emplace_back(insecure_rand);
53  }
54  control.Add(vChecks);
55  }
56  // control waits for completion by RAII, but it is done explicitly here
57  // for clarity
58  control.Wait();
59  }
60  tg.interrupt_all();
61  tg.join_all();
62  ECC_Stop();
63 }
static const int MIN_CORES
Definition: checkqueue.cpp:17
static const int PREVECTOR_SIZE
Definition: checkqueue.cpp:20
void ECC_Start()
Initialize the elliptic curve support.
Definition: key.cpp:438
void resize(size_type new_size)
Definition: prevector.h:414
void Add(std::vector< T > &vChecks)
Definition: checkqueue.h:196
int GetNumCores()
Return the number of cores available on the current system.
Definition: system.cpp:1338
static const size_t BATCHES
Definition: checkqueue.cpp:18
bool KeepRunning()
Definition: bench.h:71
static void CCheckQueueSpeedPrevectorJob(benchmark::State &state)
Definition: checkqueue.cpp:26
RAII-style controller object for a CCheckQueue that guarantees the passed queue is finished before co...
Definition: checkqueue.h:16
Users of this module must hold an ECCVerifyHandle.
Definition: pubkey.h:223
void swap(prevector< N, T, Size, Diff > &other)
Definition: prevector.h:541
void ECC_Stop()
Deinitialize the elliptic curve support.
Definition: key.cpp:455
Fast randomness source.
Definition: random.h:113
Queue for verifications that have to be performed.
Definition: checkqueue.h:28
BENCHMARK(CCheckQueueSpeedPrevectorJob, 1400)
Implements a drop-in replacement for std::vector<T> which stores up to N elements directly (without h...
Definition: prevector.h:38
static const size_t QUEUE_BATCH_SIZE
Definition: checkqueue.cpp:21
static const size_t BATCH_SIZE
Definition: checkqueue.cpp:19
uint64_t randrange(uint64_t range) noexcept
Generate a random integer in the range [0..range).
Definition: random.h:188