Resolving Kernel Design Problems Through PC Support
March 23rd 2015 Posted at Linux Kernel
Comments Off on Resolving Kernel Design Problems Through PC Support
In an operating system,a kernel functions as link between the application software and the hardware layer. In a operating system hierarchy, it is the lowest level of software. Its main objective is to manage the system’s resources. Application software could access the CPU and peripherals through kernel by invoking inter process communication process and system calls. The operating system developers provide extensive PC support to kernel design problems.
Real Time Kernel Operations
A kernel basically performs 3 operations which are Process management, Interrupt Handling and Process Synchronization.
Process management
Process management is the basic service of kernel which consists of process creation, process termination, job scheduling,context switching and other akin functions.
Network Support For Interrupt Handling
Interrupt Handling Process renders services to the interrupt requests that could be generated by peripherals like keyboard,mouse,monitor,analog to digital converters,transceivers,etc. Even the internal processes could also trigger interrupts. The interrupt service routine of the kernel processes that data received from the interrupt generating device and transfers the result to the main application software. In conventional operating systems, the application software could always be preempted by driver software at any time. This process might cause unpredictable delays in task execution in real time embedded systems. Because of this reason, the interrupt handling process has to be integrated with scheduling process. Interrupt Handling is very critical and should be designed with the help of PC Support providers.
Network Support For Process Synchronization
The third important job of kernel is to synchronize processes and communications. This is achieved by semaphores in most of the operating systems. Though semaphore provides very efficient solution to the synchronization problem and mutual exclusion, but it has certain drawbacks too. Semaphore is prone to priority inversion, which brings in boundless blocking on task execution and lowers the probability of hard real time tasks execution. In order to ensure execution of real time hard tasks, kernel provides special types of semaphores that support a resource access protocol for avoiding limitless priority inversion. Process synchronization is a mammoth task which could be accomplished with the PC support from experienced operating system designers.
Process States
A process state is defined by the stage of execution that a process is in. During the process the system makes transition from one state to another which is triggered by some internal or external conditions. There are at least 3 states in a kernel process which supports the execution of concurrent activities on a single processor, where semaphores are used for synchronization and mutual exclusion. Those 3 states are Running State, Ready State and Waiting State. Process states should be implemented under the guidance of a network Support provider.
Running State
A task enters this state when it starts execution on the processor.
Ready State
The process enters this state when tasks are ready to be executed but cannot be executed because another task is assigned to the processor. All the tasks in this state are maintained in a queue which is known as ready queue.
Waiting State
The process enters this state when it executes a synchronization primitive to wait for an event. This operation is a wait primitive on a locked semaphore, if semaphores are used. The task is put into a queue related to the semaphore. The task on the top of the queue is executed when the semaphore is unlocked by another task whose execution is complete. When a task is ready to be executed, it is inserted in the ready queue.
PC Support For Kernel Design Problems
Kernel design is very complicated and time consuming task, which needs enormous effort. This herculean task could be made easy with network support form operating system developers. Nowadays many PC support providers are rendering network support to kernel design problems.
Daniel Hughes is one of most heralded content writer of www.pccarencure.com. Pccarencure offers 24×7 PC Support, Network Support, Computer Support, Tech Support to millions of customers, via Remote Computer Support, from expert technicians.
Find More Linux Kernel Articles