Function RoundDownToNearest

tensorflow/compiler/xla/util.h:457–459

// RoundDownToNearest(13, 8) => 8
template <typename T>
T RoundDownToNearest(T value, T divisor) {
  return FloorOfRatio(value, divisor) * divisor;
}

// Given a number of flops executed in an amount of time, produces a string that
// represents the throughput;