i Consider two different implementations, 11 and12, of the same instruction set. There are threeclasses ofinstructions (A, B, and C) in the instruction set. 11 has a clockrate of 5 GHz, and 12 has a clock rateof 7 GHz. The average numberof cycles for each instruction class on 11 and 12 is given in thefollowing table:ClassCPI on 11CPI on 12C1 UsageC2 UsageC3 UsageA30%25%5%B12.40%25%90%4230%50%5%The table also contains a summary of average proportion ofinstruction classes generated by three differentcompilers, C1, C2,and C3. Assume that each compiler uses the same number ofinstructions for a givenprogram but that the instruction mix is asdescribed in the table.a). Using C1, compute the average CPI for each of 1 and 12Then compute the speed, that is the averagenumber of instructionsper second for each of 1 and 12. Then decide which one is fasterthan the other? andin what ratio?b). Using C2, compute the average CPI for each of 11 and 12Then compute the speed, that is the averagenumber of instructionsper second for each of 11 and 12. Then decide which one is fasterthan the other? andin what ratio?

Answered: Consider two different implementations,…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Given an instruction sequence with instructions in classes A, B, and C as the table below: Instruction Class A B C |CPI Instruction Count|10|40|10| 2 1 3 Total number of instructions in this sequence = Number of clock cycles from instruction class A = Number of clock cycles from instruction class B = Number of clock cycles from instruction class C = Total number of clock cycles = Average CPI for this instruction sequence = (Answer with a float the decimal point, e.g. 4.5)
AziTech is considering the design of a new CPU for its new model of computer systems for 2021. It is considering choosing between two (2) CPU (CPUA and CPUB) implementationsbased on their performance. Both CPU are expected to have the same instruction set architecture. CPUA has a clock cycle time of 60 ns and CPUB has a clock cycle time of 75 ns. The same number of a particular instruction type is expected to be executed on both CPUsin order to determine which CPU would executes more instructions. CPUA is able to execute2MB of instructions in 5*106 clock cycles. CPUB executes the same number of instructions in 3*106 clock cycles.a) Using the MIPS performance metric, which of the two (2) CPU should be selected to be implemented in the new computer system. Justify your choice. b) Compute the execution time for both CPUs. Which CPU is faster?
Question 20 Consider two different machines with two different instruction sets, both of which have a clock rate of 800 MHz. The following measurements are recorded on the two machines running a given set of benchmark programs. Instruction Type Machine A Arithmetic and logic Load and store Branch Others Machine B Arithmetic and logic Load and store Branch Others O 50 ms O 70 ms O 55.2 ms O 60 ms Instruction Count (millions) O None of them 8 4 2 4 10 8 2 4 Cycles per Instruction 1 3 4 With machine A, how long would it take to execute the program? 3 1 2 4 3
i want all the staps Consider a computer which has a memory which is capable of storing 4096 K words and each word in memory can be of size 32 bits. The computer supports a total of "6" addressing modes, and it has “50" computer registers. The computer supports instructions, where each instruction consists of following fields: • Mode • Operation code • Register • Register • Memory Address Given that each instruction will be stored in one memory word, discuss with a suitable diagram the format of instruction by specifying number of bits for each field of instruction. Discuss each field of instruction
Indirect Addressing Mode Instruction 002A J@ RETADR 3E20030030 RETADR RESW 1 1.Instruction Starts with 002A2.Opcode of J is 3C3.Object code is 3E2003Please show the details
Q3: Suppose there is a processing unit composed by CPU and I/O component. For a specific task, CPU takes 5 second to finish the execution and I/O takes 2 second to process. The communication time between CPU and I/O can be elimiate under this circumstance. Execution Time 7 second 5second 2 second CPU time I/O time If CPU time decreases by 25% per year for 3 years and I/O time decreases by 20% per year 1) How many times faster is this program after 3 years? 2) What percentage of new time is I/O? and what percentage of new time is CPU?
Consider two different implementations, M1 and M2, of the same instruction set. There are three classes of instructions (A, B, and C) in the instruction set. M1 has a clock rate of 2.0GHz and M2 has a clock rate of 2.5GHz. The average number of cycles for each instruction class and their frequencies (for a typical program) are as follow on the table. (a) Calculate the average CPI for each machine, M1, and M2.(b) Calculate the average MIPS ratings for each machine, M1 and M2
Suppose the implementation of an instruction set architecture uses three classes of instructions, which are called A, B, and C. The total dynamic instruction count is 1 x 10^7 and the processor's clock rate is 2.5 GHz. Details for the three classes are given in the table below: Class A B C ΙΑ Complete the following table. Express all answers in scientific notation and round to two decimal places, when needed. Class Instruction Count B CPI 1 2 3 C % of instructions 20% 50% 30% x 10^ x 10^ x 10^ Number of Clock Cycles x 10^ x 10^ x 10^
1. Consider a machine running a program with four classes of instructions: A/B/C/D. The program requires 360 seconds, with the number of seconds executing each class as shown in the table below: Instruction Class A B C Time (sec) 100 80 120 60 1.1. By how much is the total execution time changed if the time for class D is reduced by 20% and the time for class C is increased by 10% (assuming no other changes)? 1.2. If we want to reduce the total execution time by 20% by optimizing class A only, what is the target execution time of class A instructions in order to achieve the reduction (assuming all other instructions are not changed)? 1.3. Can the total time be reduced by 25% if we only optimize class B? Use calculation to justify your answer.
E In the following code block(Reference:Q11), you will a set of assembly instructions with corresponding line numbers (line numbers are for informational purpose only and they are not part of the source code). 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 mov edx, 5 dec ecx jmp LABEL1 mov eax, 1 LABEL1: mul edx jmp ecx mov edx, 0678h sub edx, eax jmp DWORD PTR [edx] neg ebx add ecx, ebx mov eax, 0 For each of the conditions/scenario listed below, indicate the corresponding line number (that cause or is associated with the condition/scenario). Enter 0 (Zero) if the condition is not caused by the block of code. 1) Memory indirect jump: type your answer... type your answer... type your answer... type your answer... 2) Register indirect jump: 3) Relative short jump: type your answer... 5) Two's complement type your answer... 4) Relative near jump: 6) Unreachable code

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