Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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The designer has determined that a substantial increase in the clock rate is possible, but this increase will affect the rest of the CPU design, causing computer B to require 1.3 times as many clock cycles as computer A for this program.
What clock rate should we tell the designer to target?
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- What does it imply when applied to a computer that has a limited instruction set to use the word "reduced" in this context?arrow_forwardSuppose two CPU A and B have exactly the same circuits, but different clock frequencies. Answer the following questions: a) If the clock frequency of CPU A is 8MHz, how long is one clock cycle of CPU A? b) If the CPU A can execute 0.4 million instructions per second on average, how long is the average time to execute one instruction? c) What is the average number of clock cycle to execute one instruction for CPU A? d) The frequency of CPU B is 12MHz. What is the average number of instructions that can be executed per second?arrow_forwardConsider the following scenario. Please share your understanding of a multi-core processor and how it works then explain which student is correct and why. Your post should be at least two paragraphs. Scenario: One friend claims that a dual-core system runs at twice the speed as a single-core system; another friend disagrees by saying that it runs twice as many programs at the same time; a third friend says it runs twice as much data at the same time.arrow_forward
- What problems do the SPEC CPU benchmarks solve that the Whetstone, Dhrystone, and Linpack benchmarks don't?arrow_forwardYour favorite computer program (after being converted to MIPS assembly code, then to machine code) results in 2.5e8 instructions. Consider the three different CPUs and their clock rates and CPIs and determine how much time it would take each of them to execute this program. Lawrence’s computer with a clock rate of 3.32 Ghz and a CPI of 1.2.arrow_forwardYour favorite computer program (after being converted to MIPS assembly code, then to machine code) results in 2.5e8 instructions. Consider the three different CPUs and their clock rates and CPIs and determine how much time it would take each of them to execute this program. Rick Sanchez’s computer with a clock rate 7.99 Hz (hertz, not gigahertz) and a CPI of 1.1.arrow_forward
- Since CPUs are printed and electricity cannot be altered, we have no idea what would happen if we tried to alter their clock speed.arrow_forwardWe may assume that the number of accessible cores in modern CPUs is doubled with each new generation every 18 months. How much more off-chip memory bandwidth would a CPU released in three years need in order to maintain the same per-core performance?arrow_forwardCalculate the CPU execution time (expressed in milliseconds) of a program with 10 million instructions on a 2.5 GHz CPU with the following basic instruction-type breakdowns and CPIs: Arithmetic: 60%, CPI = 2 Load & Store (assuming perfect caches): 25%, CPI = 5 Branching: 15%, CPI = 3 In addition, you are told that the overall cache miss rate for instructions is 1%, the overall cache miss rate for data is 3%, and the cache miss penalty is 100 cycles. You can ignore the hit time (consider it zero).arrow_forward
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