CPP   17

lockedpool cpp

Guest on 6th July 2022 06:36:49 PM

  1. // Copyright (c) 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 <iostream>
  10. #include <vector>
  11.  
  12. #define ASIZE 2048
  13. #define BITER 5000
  14. #define MSIZE 2048
  15.  
  16. static void BenchLockedPool(benchmark::State& state)
  17. {
  18.     void *synth_base = reinterpret_cast<void*>(0x08000000);
  19.     const size_t synth_size = 1024*1024;
  20.     Arena b(synth_base, synth_size, 16);
  21.  
  22.     std::vector<void*> addr;
  23.     for (int x=0; x<ASIZE; ++x)
  24.         addr.push_back(nullptr);
  25.     uint32_t s = 0x12345678;
  26.     while (state.KeepRunning()) {
  27.         for (int x=0; x<BITER; ++x) {
  28.             int idx = s & (addr.size()-1);
  29.             if (s & 0x80000000) {
  30.                 b.free(addr[idx]);
  31.                 addr[idx] = nullptr;
  32.             } else if(!addr[idx]) {
  33.                 addr[idx] = b.alloc((s >> 16) & (MSIZE-1));
  34.             }
  35.             bool lsb = s & 1;
  36.             s >>= 1;
  37.             if (lsb)
  38.                 s ^= 0xf00f00f0; // LFSR period 0xf7ffffe0
  39.         }
  40.     }
  41.     for (void *ptr: addr)
  42.         b.free(ptr);
  43.     addr.clear();
  44. }
  45.  
  46. BENCHMARK(BenchLockedPool, 1300);

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