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bearhunter [10]
3 years ago
13

Explain why Windows and Linux implements multiple locking mechanisms. Describe the circumstances under which they use spinlocks,

mutex locks, semaphores, and condition variables. In each case, explain why the mechanism is needed.
Computers and Technology
1 answer:
galben [10]3 years ago
8 0

Answer:

The description for the given question is described in the explanation section below.

Explanation:

Depending on the needs of the device programmers these OS have various locking frameworks. Spinlocks become beneficial for preemptive multitasking processes during which a thread will operate in such an active loop instead of risking a rest queue latency. Mutexes become beneficial to utility lockers.

  • Solaris 2 employs flexible mutexes, indicating something like this on preemptive multitasking computers, the mutex is introduced with either a spinning switch.
  • Semaphores and state variations are much more effective methods for consistency where a commodity needs to be managed for such a prolonged period of time because spinning is unstable over a prolonged time.

You might be interested in
How did mechanical clocks assist in completing work? How was work done previously?
lozanna [386]

Answer

Timekeeping has been a part of society since Ancient Egypt. The use of spring-powered mechanisms allowed clocks to be made smaller ... Essentially, the church bells and the mechanical clock now became the monitor of the working day.

Explanation:

4 0
3 years ago
How to calculate a pid controller
pishuonlain [190]

Answer:

Control by PID1

is a control method often used for servos.

Don't you know what a bondage is? Well, it's a system, capable of reaching and

maintain a setpoint thanks to the measurements it performs.

Imagine, for example, in a car on the highway. You want to drive at 130Km / h

without having to press the accelerator. Your car's cruise control should

by itself maintain this speed. When approaching a slope the system "notices" that for

the same power at the level of the motor, it no longer reaches the 130 km / h setpoint and will add a

little acceleration. Yes but by how much? And how long will it take for the system to

stabilize around the setpoint?

That's the whole servo problem and PID control is one way to solve it!

PID is the most widely used regulator in industry. The idea of ​​this control body is to

intentionally modify the value of the error which remains between the setpoint and the measurement

performed.

For example in the case of a position control the error would be: ε = c (p) - s (p)

In the case of proportional control, the error is virtually amplified by a certain gain

constant that should be determined according to the system.

Setpoint (t) = Kp.ε (t)

What in Laplace gives:

Setpoint (p) = Kp.ε (p)

Explanation:

5 0
3 years ago
Consider the unsigned decimal number 35. What is the value in hexadecimal?<br><br> 3510 = _______ 16
Lena [83]

Answer:

(35_{10}) = (23)_{16}

Explanation:

The Hexa-decimal numbers have base 16 and includes numbers:

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E and F

The given steps are performed to convert a decimal number to hexa-decimal number, here to convert decimal number 35 to hexa-decimal number:

  • Divide 35 by 16
  • Note the remainder, r which is 3 here and quotient which is 2
  • Again divide 2 (quotient) by 16 and note the remainder, r' which is 2 and quotient is 0
  • We will stop here as the quotient is now 0. Usually division by 16 is repeated until we get quotient = 0
  • Now arrange the remainder in reverse order to get the hexa-decimal number as r'r
  • The hexa-decimal number is (23)_{16}
4 0
3 years ago
structured analysis is called a(n) _____ technique because it focuses on processes that transform data into useful information.
zzz [600]

Answer:

Process - centered technique

Explanation:

Process - centered technique -

It is the method , where the useless or waste data is converted to some useful information , is referred to as process - centered technique .

This conversion process requires some activities , like  maintenance/support  , implementation , design , analysis and  planning .

Hence , from the given information of the question,

The correct option is Process - centered technique .

4 0
3 years ago
Which of the following statements are true about mobile app development? Select 3 options.
mestny [16]

Answer:

Option 1,4 and 5 are correct.

7 0
3 years ago
Read 2 more answers
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