Bitcoin ABC  0.24.10
P2P Digital Currency
lockedpool.cpp
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1 // Copyright (c) 2016 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  void *synth_base = reinterpret_cast<void *>(0x08000000);
16  const size_t synth_size = 1024 * 1024;
17  Arena b(synth_base, synth_size, 16);
18 
19  std::vector<void *> addr;
20  for (int x = 0; x < ASIZE; ++x) {
21  addr.push_back(nullptr);
22  }
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  // LFSR period 0xf7ffffe0
36  s ^= 0xf00f00f0;
37  }
38  });
39  for (void *ptr : addr) {
40  b.free(ptr);
41  }
42  addr.clear();
43 }
44 
ASIZE
#define ASIZE
Definition: lockedpool.cpp:11
ankerl::nanobench::Bench
Main entry point to nanobench's benchmarking facility.
Definition: nanobench.h:583
ankerl::nanobench::Bench::run
Bench & run(char const *benchmarkName, Op &&op)
Repeatedly calls op() based on the configuration, and performs measurements.
Definition: nanobench.h:1134
MSIZE
#define MSIZE
Definition: lockedpool.cpp:12
bench.h
BenchLockedPool
static void BenchLockedPool(benchmark::Bench &bench)
Definition: lockedpool.cpp:14
Arena
An arena manages a contiguous region of memory by dividing it into chunks.
Definition: lockedpool.h:50
Arena::free
void free(void *ptr)
Free a previously allocated chunk of memory.
Definition: lockedpool.cpp:95
lockedpool.h
BENCHMARK
BENCHMARK(BenchLockedPool)
Arena::alloc
void * alloc(size_t size)
Allocate size bytes from this arena.
Definition: lockedpool.cpp:54