Function TouchCacheLines

cpp/src/arrow/memory_pool_benchmark.cc:53–61

#endif

static void TouchCacheLines(uint8_t* data, int64_t nbytes) {
  uint8_t total = 0;
  while (nbytes > 0) {
    total += *data;
    data += kCacheLineSize;
    nbytes -= kCacheLineSize;
  }
  benchmark::DoNotOptimize(total);
}

// Benchmark the cost of accessing always the same memory area.
// This gives us a lower bound of the potential difference between