# fa22_prep.dvi COSC 530: Midterm 1 Study Guide Your exam will cover topics from the lecture, textbook, and homeworks. You should be prepared to answer questions on the following concepts from each...

quizz

Answered 4 days AfterSep 29, 2022

## Answer To: fa22_prep.dvi COSC 530: Midterm 1 Study Guide Your exam will cover topics from the lecture,...

Promila answered on Oct 04 2022
1 - Dennard scaling
2 data
3 internal
4 Temporal
5 Dyanmic
6 true
7 True
8 True
9 False
10 False
11 True
12 True
13 True
14 F
alse
15 True
16
Power consumption is prpoportional to capacitance of the load, Voltage and frequency of operation.
Lowering the voltage at which transistors operate, can reduce the power consumption and improve power efficiency.
Power gating or clock gating at appropriate points in overall circuits can reduce dynamic power consumption when block of the design is not in use.
Lowering the frquency of operation of overall chip can help reduce power consumption. Further all sub units of chip may not need to run at same high frequency as central processor. Providing lower frequency to each unit based on it's own requirements can help reduce power consumption of the overall chip.
17
a. Amdahls law , p = 0.2, s = 10, Then speed up = 1/[(1-p) + (p/s)]
substituting values Speed up = 1 /[(1-0.2) + 0.2/10] = 1 / [0.8 + 0.02] = 1/0.82 = 1.219
. Time spent in Original floating point operations = 20% of 200 = 40 sec.
Time spent in new floating point operations = 20% of 200 / 10 = 4 sec.
Overhead for pre processing before operations = 30sec
Total time with new format = 30 + 4 sec = 34 sec
Speed up for floating point operations alone = 40/34 = 1.17
Since new format is still faster after preprocessing...
SOLUTION.PDF