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bench: Add benchmark for lockedpool allocation/deallocation

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This commit is contained in:
Wladimir J. van der Laan 2016-10-18 17:49:02 +02:00
parent 6567999096
commit 444c673d85
2 changed files with 49 additions and 1 deletions
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3
src/Makefile.bench.include
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@ -17,7 +17,8 @@ bench_bench_bitcoin_SOURCES = \
bench/ccoins_caching.cpp \
bench/mempool_eviction.cpp \
bench/verify_script.cpp \
bench/base58.cpp
bench/base58.cpp \
bench/lockedpool.cpp
bench_bench_bitcoin_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES) $(EVENT_CLFAGS) $(EVENT_PTHREADS_CFLAGS) -I$(builddir)/bench/
bench_bench_bitcoin_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)

47
src/bench/lockedpool.cpp Normal file
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@ -0,0 +1,47 @@
// Copyright (c) 2016 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 "support/lockedpool.h"
#include <iostream>
#include <vector>
#define ASIZE 2048
#define BITER 5000
#define MSIZE 2048
static void LockedPool(benchmark::State& state)
{
void *synth_base = reinterpret_cast<void*>(0x08000000);
const size_t synth_size = 1024*1024;
Arena b(synth_base, synth_size, 16);
std::vector<void*> addr;
for (int x=0; x<ASIZE; ++x)
addr.push_back(0);
uint32_t s = 0x12345678;
while (state.KeepRunning()) {
for (int x=0; x<BITER; ++x) {
int idx = s & (addr.size()-1);
if (s & 0x80000000) {
b.free(addr[idx]);
addr[idx] = 0;
} else if(!addr[idx]) {
addr[idx] = b.alloc((s >> 16) & (MSIZE-1));
}
bool lsb = s & 1;
s >>= 1;
if (lsb)
s ^= 0xf00f00f0; // LFSR period 0xf7ffffe0
}
}
for (void *ptr: addr)
b.free(ptr);
addr.clear();
}
BENCHMARK(LockedPool);