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// Copyright (c) 2015-2020 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/bench.h>
#include <checkqueue.h>
#include <key.h>
#include <prevector.h>
#include <pubkey.h>
#include <random.h>
#include <util/system.h>
#include <boost/thread/thread.hpp>
#include <vector>
static const size_t BATCHES = 101;
static const size_t BATCH_SIZE = 30;
static const int PREVECTOR_SIZE = 28;
static const unsigned int QUEUE_BATCH_SIZE = 128;
// 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::Bench& bench)
{
// We shouldn't ever be running with the checkqueue on a single core machine.
if (GetNumCores() <= 1) return;
const ECCVerifyHandle verify_handle;
ECC_Start();
struct PrevectorJob {
prevector<PREVECTOR_SIZE, uint8_t> p;
PrevectorJob(){
}
explicit PrevectorJob(FastRandomContext& insecure_rand){
p.resize(insecure_rand.randrange(PREVECTOR_SIZE*2));
}
bool operator()()
{
return true;
}
void swap(PrevectorJob& x){p.swap(x.p);};
};
CCheckQueue<PrevectorJob> queue {QUEUE_BATCH_SIZE};
boost::thread_group tg;
// The main thread should be counted to prevent thread oversubscription, and
// to decrease the variance of benchmark results.
for (auto x = 0; x < GetNumCores() - 1; ++x) {
tg.create_thread([&]{queue.Thread();});
}
// create all the data once, then submit copies in the benchmark.
FastRandomContext insecure_rand(true);
std::vector<std::vector<PrevectorJob>> vBatches(BATCHES);
for (auto& vChecks : vBatches) {
vChecks.reserve(BATCH_SIZE);
for (size_t x = 0; x < BATCH_SIZE; ++x)
vChecks.emplace_back(insecure_rand);
}
bench.minEpochIterations(10).batch(BATCH_SIZE * BATCHES).unit("job").run([&] {
// Make insecure_rand here so that each iteration is identical.
CCheckQueueControl<PrevectorJob> control(&queue);
for (auto vChecks : vBatches) {
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();
ECC_Stop();
}
BENCHMARK(CCheckQueueSpeedPrevectorJob);
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