Identify free memory areas in allocation and de-allocations, Computer Engineering

Assignment Help:

Name and explain the popular techniques to identify free memory areas as a result of allocation and de-allocations in a heap.

Two well-liked techniques to identify free memory areas like a result of allocation and de-allocations in a heap are as:

1. Reference count: the system relates a reference count with each memory area to show the number of its active users. This number is incremented while a user accesses such area and decrements while user stops using it. The region is free if the reference counts drops to zero. Such scheme is very simple to implement although incurs incremental overheads.

2. Garbage collection: In such technique two passes are done over the memory to identify unused areas. Into 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 them to be free. Its overheads are not incremental. They are incurred all time the system runs-out of free memory to assign to fresh requests.


Related Discussions:- Identify free memory areas in allocation and de-allocations

Can we run matlab without graphics, Sometimes you may need to run scripts w...

Sometimes you may need to run scripts which have plotting commands without displaying the plots and without going into the script to comment out the commands. An example: if you're

Risk detection, what is meant by risk detection in software project managem...

what is meant by risk detection in software project management

Execute the command in linux, Now that the user's command has been parsed i...

Now that the user's command has been parsed into an array of char*, we can pass this to the OS to execute the command. To execute the command, use the execvp() function from unis

Which one memory requires refreshing, Which of following requires refreshin...

Which of following requires refreshing SRAM., DRAM., ROM. or EPROM. ? Ans. DRAM. requires refreshing.

Explain the method to identify the object classes, Explain the method to id...

Explain the method to identify the Object Classes You would always be careful while identifying relevant object classes from application domain. Objects may include physical e

Can we use flow logic control key words in abap/4, Can we use flow logic co...

Can we use flow logic control key words in ABAP/4 and vice-versa The flow control  of a dynpro having os a few statements that syntactically ressemble ABAP/4  statements .Thou

Raid and data stripping, Explained RAID? Ans: High performance devices ...

Explained RAID? Ans: High performance devices tend to be costly. So we can gain very high performance at a reasonable cost using a number of low-cost devices operating in paral

Binary search tree, Given the following interface public interface WordS...

Given the following interface public interface WordSet extends Iterable { public void add(Word word); // Add word if not already added public boolean contains(Word word);

What are null values, What are null values? If the value of a field in ...

What are null values? If the value of a field in a table is indeterminate or unknown, it is known as a null value.

What is the main use of structures, What is The main use of structures ...

What is The main use of structures The main use of structures is to lump together collections of disparate variable types, so they can conveniently be treated as a unit. For ex

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