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109年 - 109國立臺灣大學_碩士班招生考試_電機工程研究所丙組:計算機結構與作業系統(A)#105855
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題組內容
16. (5 points) Continuing from the last question, please answer which of the following statements is/are correct?
(c) Adding another LD/ST can save four clock cycles.
相關申論題
(a) The arithmetic intensity of this kernel is 1.
#451234
(b) Assuming chaining and a single memory pipeline, there are 4 chimes required.
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(a) A code segment with I0 instructions in A, 8 instructions in B, and 5 and instructions in C use 74 cycles.
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(b) The CPI of the code in part (a) is 3.
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(c) A code segment with 8 instructions in A, 6 instructions in B, and 8 and instructions in C use 82 cycles.
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(a) Directory-based protocols in general have better scalability than snooping protocols.
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(b) Snooping protocols rely on a shared bus that specifically records which caches have copies of a piece of data so that when a processor modifies its copy in its local cache, updating signals can be sent to the other caches.
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(c) Directory-based protocols is usually more complex and inefficient for small-scale systems.
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(a) The worst-case remote communication cost when the system is a 4x4 processor grid is 150 ns.
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(b) When the system is an 8x8x8 hypercube, the average CPI of the application is smaller than 1.3.
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相關試卷
110年 - 110 國立臺灣大學_碩士班招生考試_電機工程研究所丙組:計算機結構與作業系統(A)#102089
110年 · #102089
109年 - 109國立臺灣大學_碩士班招生考試_電機工程研究所丙組:計算機結構與作業系統(A)#105855
109年 · #105855