Bitcoin Core  0.20.99
P2P Digital Currency
lockedpool.cpp
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1 // Copyright (c) 2016-2019 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 
7 #include <support/lockedpool.h>
8 
9 #include <vector>
10 
11 #define ASIZE 2048
12 #define MSIZE 2048
13 
14 static void BenchLockedPool(benchmark::Bench& bench)
15 {
16  void *synth_base = reinterpret_cast<void*>(0x08000000);
17  const size_t synth_size = 1024*1024;
18  Arena b(synth_base, synth_size, 16);
19 
20  std::vector<void*> addr;
21  for (int x=0; x<ASIZE; ++x)
22  addr.push_back(nullptr);
23  uint32_t s = 0x12345678;
24  bench.run([&] {
25  int idx = s & (addr.size() - 1);
26  if (s & 0x80000000) {
27  b.free(addr[idx]);
28  addr[idx] = nullptr;
29  } else if (!addr[idx]) {
30  addr[idx] = b.alloc((s >> 16) & (MSIZE - 1));
31  }
32  bool lsb = s & 1;
33  s >>= 1;
34  if (lsb)
35  s ^= 0xf00f00f0; // LFSR period 0xf7ffffe0
36  });
37  for (void *ptr: addr)
38  b.free(ptr);
39  addr.clear();
40 }
41 
#define ASIZE
Definition: lockedpool.cpp:11
void * alloc(size_t size)
Allocate size bytes from this arena.
Definition: lockedpool.cpp:57
Bench & run(char const *benchmarkName, Op &&op)
Repeatedly calls op() based on the configuration, and performs measurements.
Definition: nanobench.h:1134
#define MSIZE
Definition: lockedpool.cpp:12
void free(void *ptr)
Free a previously allocated chunk of memory.
Definition: lockedpool.cpp:92
static void BenchLockedPool(benchmark::Bench &bench)
Definition: lockedpool.cpp:14
Main entry point to nanobench&#39;s benchmarking facility.
Definition: nanobench.h:583
BENCHMARK(BenchLockedPool)