フリー問題

問題文

A systems architect explains to a colleague why general purpose processors alone did not carry the field forward, even though they kept improving. The architect wants the reason stated in terms of how the work is shaped. Which reason is correct?

選択肢

1. General purpose processors lack the memory capacity for such a model, whereas an accelerator can address an effectively unlimited amount.
2. General purpose processors cannot perform floating point arithmetic at the precisions these models require.
3. The work is inherently sequential, so it needs a processor that can execute one long dependency chain very quickly.
4. The dominant operations are large, regular matrix computations that split into thousands of independent pieces, which suits many simple cores.