Suppose that the time to do a null remote procedure call (RPC) (i.e. 0 data…
2016
Suppose that the time to do a null remote procedure call (RPC) (i.e. 0 data bytes) is 1.0 msec, with an additional 1.5 msec for every 1K of data. How long does it take to read 32 K from the file server as 32 1K RPCs ?
Answer: B. 80 msec — Solution: Compute the time per 1K RPC, then multiply by 32. Time per 1K RPC = base time (1.0 ms) + per-K data time (1.5 ms) = 2.5 ms. Total time for 32 such…
- A.
49 msec
- B.
80 msec
- C.
48 msec
- D.
100 msec
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Correct answer: B
Solution: Compute the time per 1K RPC, then multiply by 32.
Time per 1K RPC = base time (1.0 ms) + per-K data time (1.5 ms) = 2.5 ms.
Total time for 32 such RPCs = 32 × 2.5 ms = 80 ms.
Answer: 80 ms
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