mirror of https://github.com/bitcoin/bitcoin
46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
// Copyright (c) 2016-2019 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <bench/bench.h>
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#include <support/lockedpool.h>
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#include <vector>
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#define ASIZE 2048
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#define BITER 5000
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#define MSIZE 2048
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static void BenchLockedPool(benchmark::State& state)
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{
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void *synth_base = reinterpret_cast<void*>(0x08000000);
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const size_t synth_size = 1024*1024;
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Arena b(synth_base, synth_size, 16);
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std::vector<void*> addr;
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for (int x=0; x<ASIZE; ++x)
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addr.push_back(nullptr);
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uint32_t s = 0x12345678;
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while (state.KeepRunning()) {
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for (int x=0; x<BITER; ++x) {
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int idx = s & (addr.size()-1);
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if (s & 0x80000000) {
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b.free(addr[idx]);
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addr[idx] = nullptr;
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} else if(!addr[idx]) {
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addr[idx] = b.alloc((s >> 16) & (MSIZE-1));
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}
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bool lsb = s & 1;
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s >>= 1;
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if (lsb)
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s ^= 0xf00f00f0; // LFSR period 0xf7ffffe0
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}
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}
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for (void *ptr: addr)
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b.free(ptr);
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addr.clear();
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}
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BENCHMARK(BenchLockedPool, 1300);
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