Dynamic allocator: Dynamic allocator keeps the heap as a group of several size blocks; each block is an attached portion of virtual memory which is allocated or free. An allocated block has been clearly kept for use by the application. A free block is offered to be allocated. Two types of allocators: 1. Explicit allocators 2. Implicit allocators Explicit allocators: Explicit allocators need the application to explicitly free any allocated blocks. Implicit allocators: Implicit allocators is the method of automatically releasing vacant allocated blocks. This is also known as garbage collection. Implicit free list: In this method, a block contains one word header, payload and additional padding. The header encrypts the block size which contains header and padding; and also check the block is allocated or free. If the arrangement is double-word, the block size is constantly a multiple of “8” and the low-order bits of the block size are always zero. Thus, essential to store only the high-order “29 bits” of the block size, freeing the remaining “3 bits” to encrypt other information. Here, smallest significant bits is using to represent the block is allocated or free.

Question

Want to see the full answer?

Answer 1

Question

Chapter 9.9, Problem 9.6PP

Program Plan Intro

Dynamic allocator:

Dynamic allocator keeps the heap as a group of several size blocks; each block is an attached portion of virtual memory which is allocated or free.

An allocated block has been clearly kept for use by the application.

A free block is offered to be allocated.

Two types of allocators:

1. Explicit allocators

2. Implicit allocators

Explicit allocators:

Explicit allocators need the application to explicitly free any allocated blocks.

Implicit allocators:

Implicit allocators is the method of automatically releasing vacant allocated blocks. This is also known as garbage collection.

Implicit free list:

In this method, a block contains one word header, payload and additional padding. The header encrypts the block size which contains header and padding; and also check the block is allocated or free.

If the arrangement is double-word, the block size is constantly a multiple of “8” and the low-order bits of the block size are always zero.

Thus, essential to store only the high-order “29 bits” of the block size, freeing the remaining “3 bits” to encrypt other information.

Here, smallest significant bits is using to represent the block is allocated or free.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

If a UDP datagram is sent from host A, port P to host B, port Q, but at host B there is no process listening to port Q, then B is to send back an ICMP Port Unreachable message to A. Like all ICMP messages, this is addressed to A as a whole, not to port P on A. (a) Give an example of when an application might want to receive such ICMP messages. (b) Find out what an application has to do, on the operating system of your choice, to receive such messages. (c) Why might it not be a good idea to send such messages directly back to the originating port P on A?

Discuss how business intelligence and data visualization work together to help decision-makers and data users. Provide 2 specific use cases.

This week we will be building a regression model conceptually for our discussion assignment. Consider your current workplace (or previous/future workplace if not currently working) and answer the following set of questions. Expand where needed to help others understand your thinking: What is the most important factor (variable) that needs to be predicted accurately at work? Why? Justify its selection as your dependent variable.