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// Copyright (c) 2015 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "bench.h"
#include "util.h"
#include "validation.h"
#include "checkqueue.h"
#include "prevector.h"
#include <vector>
#include <boost/thread/thread.hpp>
#include "random.h"
// This Benchmark tests the CheckQueue with the lightest
// weight Checks, so it should make any lock contention
// particularly visible
static void CCheckQueueSpeed(benchmark::State& state)
{
struct FakeJobNoWork {
bool operator()()
{
return true;
}
void swap(FakeJobNoWork& x){};
};
CCheckQueue<FakeJobNoWork> queue {128};
boost::thread_group tg;
for (auto x = 0; x < std::max(2, GetNumCores()); ++x) {
tg.create_thread([&]{queue.Thread();});
}
while (state.KeepRunning()) {
CCheckQueueControl<FakeJobNoWork> control(&queue);
// We can make vChecks out of the loop because calling Add doesn't
// change the size of the vector.
std::vector<FakeJobNoWork> vChecks;
vChecks.resize(30);
// We call Add a number of times to simulate the behavior of adding
// a block of transactions at once.
for (size_t j = 0; j < 101; ++j) {
control.Add(vChecks);
}
// control waits for completion by RAII, but
// it is done explicitly here for clarity
control.Wait();
}
tg.interrupt_all();
tg.join_all();
}
// This Benchmark tests the CheckQueue with a slightly realistic workload,
// where checks all contain a prevector that is indirect 50% of the time
// and there is a little bit of work done between calls to Add.
static void CCheckQueueSpeedPrevectorJob(benchmark::State& state)
{
struct PrevectorJob {
prevector<28, uint8_t> p;
PrevectorJob(){
}
PrevectorJob(FastRandomContext& insecure_rand){
p.resize(insecure_rand.rand32() % 56);
}
bool operator()()
{
return true;
}
void swap(PrevectorJob& x){p.swap(x.p);};
};
CCheckQueue<PrevectorJob> queue {128};
boost::thread_group tg;
for (auto x = 0; x < std::max(2, GetNumCores()); ++x) {
tg.create_thread([&]{queue.Thread();});
}
while (state.KeepRunning()) {
// Make insecure_rand here so that each iteration is identical.
FastRandomContext insecure_rand(true);
CCheckQueueControl<PrevectorJob> control(&queue);
for (size_t j = 0; j < 101; ++j) {
std::vector<PrevectorJob> vChecks;
vChecks.reserve(30);
for (auto x = 0; x < 30; ++x)
vChecks.emplace_back(insecure_rand);
control.Add(vChecks);
}
// control waits for completion by RAII, but
// it is done explicitly here for clarity
control.Wait();
}
tg.interrupt_all();
tg.join_all();
}
BENCHMARK(CCheckQueueSpeed);
BENCHMARK(CCheckQueueSpeedPrevectorJob);
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