Suppose Program A, when run on a certain computer, records a user CPU time of 3 seconds, an elapsed wallclock time of 4 seconds, and a system performance of 10 MFLOP/sec. The computer is capable of either doing calculations in the CPU or doing I/O at any given time, but not both. If the processor is replaced with one that is six times faster without affecting the I/O speed, what will be the new user CPU time, the wallclock time, and the MFLOP/sec performance? User CPU time: 0.5 seconds, Wallclock time: 1.5 seconds, Performance: 60 MFLOP/sec User CPU time: 0.5 seconds, Wallclock time: 1.5 seconds, Performance: 40 MFLOP/sec User CPU time: 0.5 seconds, Wallclock time: 1.5 seconds, Performance: 20 MFLOP/sec ○ User CPU time: 0.5 seconds, Wallclock time: 1.5 seconds, Performance: 40 MFLOP/sec
Suppose Program A, when run on a certain computer, records a user CPU time of 3 seconds, an elapsed wallclock time of 4 seconds, and a system performance of 10 MFLOP/sec. The computer is capable of either doing calculations in the CPU or doing I/O at any given time, but not both. If the processor is replaced with one that is six times faster without affecting the I/O speed, what will be the new user CPU time, the wallclock time, and the MFLOP/sec performance? User CPU time: 0.5 seconds, Wallclock time: 1.5 seconds, Performance: 60 MFLOP/sec User CPU time: 0.5 seconds, Wallclock time: 1.5 seconds, Performance: 40 MFLOP/sec User CPU time: 0.5 seconds, Wallclock time: 1.5 seconds, Performance: 20 MFLOP/sec ○ User CPU time: 0.5 seconds, Wallclock time: 1.5 seconds, Performance: 40 MFLOP/sec
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Transcribed Image Text:Suppose Program A, when run on a certain computer, records a user CPU time of 3 seconds, an elapsed wallclock time of 4 seconds, and a system performance of 10 MFLOP/sec. The computer is capable of either doing
calculations in the CPU or doing I/O at any given time, but not both. If the processor is replaced with one that is six times faster without affecting the I/O speed, what will be the new user CPU time, the wallclock time, and the
MFLOP/sec performance?
User CPU time: 0.5 seconds, Wallclock time: 1.5 seconds, Performance: 60 MFLOP/sec
User CPU time: 0.5 seconds, Wallclock time: 1.5 seconds, Performance: 40 MFLOP/sec
User CPU time: 0.5 seconds, Wallclock time: 1.5 seconds, Performance: 20 MFLOP/sec
○ User CPU time: 0.5 seconds, Wallclock time: 1.5 seconds, Performance: 40 MFLOP/sec
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