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- Memory Management.
The kernel of a computer will have full access to the system's memory and is required to allow any processes to access this memory when needed. To do this, the kernel carries out virtual addressing. Within virtual addressing it is possible to make a given physical address to appear as a virtual address, i.e. Another address. These virtual address spaces are different for different processes.
The memory that is processed to access one virtual address may be different to the memory that a process accesses at the same address. These spaces allow ever program on the computer to run as if it is the only one and stops these applications from crashing each other. Virtual addressing can also be used to create virtual partitions of memory in disjointed areas. One of these areas will be reserved for the kernel and other for applications.
- Device Management.
Device drivers, processed by the kernel, are used in order to control the peripherals that are connected to the computer. These peripherals need to be accessed by processes to perform useful functions. A list of the available devices is maintained by a kernel and is either known in advance, configured by the user or detected by the operating system at run time.
Device management is a very operating system specific topic and each of the drivers is handled differently by the different kinds of kernel design. The thing that they all have in common is that the kernel is required to provide the input output to allow drivers to access their devices.
These two different facilities within the kernel of a computer are used alongside process management and system calls to help the kernel carry out its role within the system.
What else can I help you with?
How is data transferred between a CPU and RAM?
A memory management unit (MMU) is a small device between CPU and RAM recalculating the actual memory address, for example to provide an abstraction of virtual memory or other tasks.
What is the difference between a regular memory card and an Ultra Memory card.?
What is the difference between a regular memory card and an Ultra Memory card
Difference between multistore and working model memory?
what is the difference between the memory store model and the working memory model?
What is the difference between struct and union in c file management?
The main difference is in how the data structures are stored. In a union, all of the elements are stored in one location. A structure stores each of its elements in a separate memory location.
What are the four parts of operating system?
1. Processor management 2. Memory management 3. Device management 4. File management
Name the five key concepts about operating system that a user needs to know and understand?
1. User Interface 2. Memory Management 3. Processor Management 4. Device Management 5. File Management
What is the difference between a memory stick and a memory stick pro?
Marketing.
What is the difference between write allocate and no write allocate in terms of cache memory management?
In cache memory management, write allocate means that data is brought into the cache before writing to it, while no write allocate means that data is written directly to the main memory without being brought into the cache first.
Block diagram of 8257 dma controller?
it is a device to transfer the data directly between io device and memory without through the cpu so it performs a high-speed data transfer between memory and io device
What is a portion of memory that is allocated to a device?
A portion of memory allocated to a device is commonly referred to as a memory-mapped I/O space or device memory. This area of memory is reserved for the device to store data related to its operations, such as buffers for input/output processing. It allows the CPU to communicate with the device by reading from and writing to specific memory addresses associated with that device. This allocation is essential for efficient data transfer and control between the CPU and peripheral devices.
What is a difference between register and a memory location?
difference between register and memory location
What is the difference between CD and ROM?
CD = Compact Disk ROM = Read Only Memory Together CD-ROM means a compact disc made into a read only memory device. Rewritable cd's are not cd-roms as they are memory devices that can be rewrote to.
