Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. The accelerating search for described in subsequent exercise is typical of hard-disk drives. By contrast floppy disks and several hard disks manufactured before the mid-1980s typically seek at a fixed rate. Presume that the disk in subsequent exercise has a constant-rate seek rather than a constant acceleration seek consequently seek time is of the form t = x + yL where t is the time in milliseconds and L is the seek distance. Presume that the time to seek to an adjacent cylinder is 1 millisecond as before and is 0.5 milliseconds for every additional cylinder.
a. Write an equation for this seek time like a function of the seek distance.
b. Utilizing the seek-time function from a part calculate the total seek time for each of the schedules in Exercise 12.2. Is your answer the similar as it was for Exercise 12.3(c)?
c. What is the percentage accelerate of the fastest schedule over FCFS in this case?
Answer:
a. t = 0.95 + 0.05L
b. FCFS 362.60; SSTF 95.80; SCAN 497.95; LOOK 174.50; C-SCAN 500.15; (and C-LOOK 176.70). SSTF is still the winner as well as LOOK is the runner-up.
c. (362.60 - 95.80)/362.60 = 0.74 the percentage accelerate of SSTF over FCFS is 74% with respect to the seek time. If we comprise the overhead of rotational latency and data transfer the percentage speedup will be less.
The scheduling technique in which CPU is allocated to the process with least CPU-burst time is known as Shortest job first Scheduling is a scheduling technique in which CPU i
Q. Consider a calculating environment where a unique number is associated with each process and each object in the system. Suppose that we permit a process with number n to acce
How exactly is a page table used to look up an address? The CPU has a page table base register (PTBR)which points to the base (entry 0) of the level-0 page table. Each process h
properies of Batch oriented and interactive operating system.
Write a program that will input two numbers from the keyboard and execute each of the signed and unsigned multiply and divide instructions. For each instruction, the program shoul
Many-to-One Model (Green Threads) Implementations of the many-to-one model a lot of user threads to one kernel thread permit the application to create any number of threads tha
how copy on write on pages when many process works at a same time?
Q. Describe the purpose of the open() and close() operations. Answer: The open() operation notifies the system that the named file is about to become active. The c
Explain the Exit (status) Function Exit function causes the calling process to be terminated. Actually, all file descriptors are immediately closed but the process is not
In which page replacement policy Balady’s anomaly occurs? FIFO (First in First Out)
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd