問題文
An administrator measures the collective communication inside a single server. The figure reported for very small transfers is far below the figure for large ones. Is this a problem?
選択肢
- No, small transfers are dominated by fixed overheads rather than by the capacity of the links, so the two figures are expected to differ.
- Yes, but only if the small-transfer figure is below half of the large-transfer figure, which is the documented point at which the fixed overheads stop being a sufficient explanation for the gap between them.
- No, and the small-transfer figure can therefore be ignored.
- Yes, because the links inside a server should deliver their full capacity regardless of the transfer size and a shortfall at small sizes indicates that the devices are not actually joined by those links.