Method CacheSize

cpp/src/arrow/util/cpu_info.cc:556–571

const std::string& CpuInfo::model_name() const { return impl_->model_name; }

int64_t CpuInfo::CacheSize(CacheLevel level) const {
  constexpr int64_t kDefaultCacheSizes[] = {
      32 * 1024,    // Level 1: 32K
      256 * 1024,   // Level 2: 256K
      3072 * 1024,  // Level 3: 3M
  };
  static_assert(
      sizeof(kDefaultCacheSizes) / sizeof(kDefaultCacheSizes[0]) == kCacheLevels, "");

  static_assert(static_cast<int>(CacheLevel::L1) == 0, "");
  const int i = static_cast<int>(level);
  if (impl_->cache_sizes[i] > 0) return impl_->cache_sizes[i];
  if (i == 0) return kDefaultCacheSizes[0];
  // l3 may be not available, return maximum of l2 or default size
  return std::max(kDefaultCacheSizes[i], impl_->cache_sizes[i - 1]);
}

bool CpuInfo::IsSupported(int64_t flags) const {
  return (impl_->hardware_flags & flags) == flags;