ANALYZING THE EFFECT OF GAIN TIME ON SOFT-TASK SCHEDULING POLICES IN REAL TIME SYSTEMS

The paper is dealing with the effect of gain time on soft task scheduling in RTOS based application. RTOS is an operating system that supports real-time applications and embedded systems by providing logically correct result within the deadline. In Multitasking gain time is a key factor which explicit the difference between the actual time and maximum time for completion of a process. In some real time applications, delay in a particular process may lead to severe effects. In this project work , delay in a task is avoided by using an effective preemptive scheduling and giving importance to high priority interrupts even though if there is any pending low priority interrupts on semaphore. As a prototype demonstration hereby implementing in the hardware using ARM Processor for an automobile application. An object tracking system will be fixed in the vehicle with vehicle-object distance measurement facility. If an object approaches the vehicle beyond the minimum distance limit, then preemptive scheduler will assign the object interference as a high priority interrupt. As an immediate response the speed of the vehicle will be changed by using a control method PWM. The Pulse width modulating technique will be initiated automatically by the Processor without any manual braking system and a heavy alert will be given to the person to bring concentration in driving.