Function RoundUpToScratchRangeSize

be/src/runtime/tmp-file-mgr.cc:1395–1404

Rounds up to the smallest unit of allocation in a scratch file that will fit 'bytes'.

// Rounds up to the smallest unit of allocation in a scratch file
// that will fit 'bytes'.
static int64_t RoundUpToScratchRangeSize(bool punch_holes, int64_t bytes) {
  if (punch_holes) {
    // Round up to a typical disk block size - 4KB that that hole punching can always
    // free the backing storage for the entire range.
    return BitUtil::RoundUpToPowerOf2(bytes, TmpFileMgr::HOLE_PUNCH_BLOCK_SIZE_BYTES);
  } else {
    // We recycle scratch ranges, which must be positive power-of-two sizes.
    return max<int64_t>(1L, BitUtil::RoundUpToPowerOfTwo(bytes));
  }
}

void TmpFileGroup::UpdateScratchSpaceMetrics(int64_t num_bytes, bool is_remote) {
  scratch_space_bytes_used_counter_->Add(num_bytes);