Explain approaches to identify free memory area in a heap, Computer Engineering

Assignment Help:

Discuss two main approaches to identify free memory area in a heap.

Two popular systems to identify free memory areas as a result of allocation and de-allocations in a heap are:

1. Reference count: the system relates a reference count along with each memory area to specify the number of its active users. Such number is incremented while a user accesses that area and decrements while user stops utilizing that. The area is free if the reference counts drops to zero. Such scheme is very easy to implement though incurs incremental overheads.

2. Garbage collection: In this system two passes are made over the memory to know unused areas. In the first pass this traverses all pointers pointing to assigned areas and marks the memory areas which are in use. The second pass determines all unmarked areas and declares all to be free. The garbage collection over-heads are not incremental. They are incurred all time the system runs out of free memory to assign to fresh requests.


Related Discussions:- Explain approaches to identify free memory area in a heap

Illustrate what is universal law of universal gravitation, Q. Illustrate wh...

Q. Illustrate what is the universal law of universal gravitation? Answer:- Declaration that any particle of matter in the universe attracts any other with a force varying

Application and function areas - artificial intelligence, Application and F...

Application and Function Areas - artificial intelligence: Individual applications and function often drive "AI" research much more than the long term relative field described

Not dragged and dropped onto the form, I have to make a quiz machine progra...

I have to make a quiz machine program in in Visual Basic with the following: A menu strip that must be formed programmatically (ie NOT dragged and dropped onto the form). There

Convert the decimal to hexadecimal equivalent number, Convert the decimal n...

Convert the decimal number 45678 to its hexadecimal equivalent number. Ans: (45678) 10 =(B26E) 16 (45678) 10 =(B26E) 16

Explain the fetch cycle, Q. Explain the Fetch Cycle? The beginning of e...

Q. Explain the Fetch Cycle? The beginning of every instruction cycle is the fetch cycle and causes an instruction tobe fetched from memory.   The fetch cycle comprises four

What is known as multiphase clocking, What is known as multiphase clocking?...

What is known as multiphase clocking? When edge-triggered flip flops are not used, two or more clock signals may be required to guarantee proper transfer of data. This is calle

Develop a menu driven program, Q.  Develop a Menu driven program with follo...

Q.  Develop a Menu driven program with following menu: a.  Binary to Decimal b.  Binary to Octal c.  Binary to Hexadecimal d.  Exit (Put proper validation for input

What is flash memory, Q. What is Flash Memory? This memory is other fo...

Q. What is Flash Memory? This memory is other form of semiconductor memory that was first introduced in mid-1980.  These memories can be reprogrammed at high speed and therefo

What is optical character recognition, What is Optical character recognitio...

What is Optical character recognition (OCR)  Information on paper is automatically read by a scanner and is then processed/analysed by OCR software and stored in an electronic

Usability test of website, For this part of your assessment you are require...

For this part of your assessment you are required to prepare and conduct a usability test of the website that you have chosen to review from Part A . You must design the script,c

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd