What is a memory management unit?
Computer hardware, which is responsible for managing the computer's memory system, is called a memory management unit (MMU). This component serves as a buffer between CPU and system memory. The function performed by a memory management unit can usually be divided into three areas: Hardware memory management, operating system memory management, and application memory management. Although the memory management unit may be a separate part of the chip, it is usually integrated into the central processing unit (CPU).
Generally -related memory -related hardware includes memory with random access (RAM) and memory cache. RAM is a compartment of physical storage located on a hard disk. It is the main storage area of the computer where data is read and written. The memory cache is used to hold copies of certain data from the main memory. The CPU approaches this information held in the memory cache, which helps to speed up the processing time.
When Physical Memory or RAM, it runs out of memorySpace, computer automatically uses virtual memory from the hard drive to start the desired program. The memory management unit allows memory from the operating system to various applications. The virtual address area located in the central processing unit consists of a series of addresses that are divided into pages. Pages are secondary storage blocks that have the same size. The automated page of the page allows the operating system to use storage space scattered on a hard disk.
Instead of receiving an error message that there is not enough memory, MMU automatically gives the system to create enough virtual memory to start the application. A neighboring virtual memory space from the virtual memory block of the same size is created to start the application. This feature is the main key to performing this procedure works efficiently and efficiently because the system is not NUTo create one piece of virtual memory for processing the program requirements. Creating different sizes of memory space for adapting to programs of different sizes causes a problem known as fragmentation. This could lead to the possibility that it will not have enough free space for larger programs if the total space available is actually sufficient.
Memory Management The application includes the process of assigning the memory needed to start the program from available memory sources. Many copies of the same application can be triggered in larger operating systems. The memory management unit often assigns the application of the memory address that best suits its need. It is easier to assign these programs the same addresses. The memory management unit can also distribute memory sources to programs as needed. After the operation is completed, the memory is recycled for use elsewhere.
One of the main challenges is to perceive memory management unless the data is already needed andcan be discarded. This releases memory for use on other processes. Due to this problem, automatic and manual memory management has become a separate study of study. Ineffective memory management is the main problem in terms of optimal performance of computer systems.