i have to present seminar on embedded systems. So i want interesting information about it.
2006-10-07 06:10:12 · 4 answers · asked by anushka 1 in Computers & Internet ➔ Programming & Design
first used in washing machines!
2006-10-07 06:17:23 · answer #1 · answered by sarahstar111 2 · 0⤊ 1⤋
The principle of real time is always relativistic. A system is considered real time when you never have to wait more than a fixed amount of time.
Normally when we talk of a real time OS, it means it either does not support multitasking (more than one program running at a time) or it suspends multitasking as soon as a real time program requests processor usage.
Of course you could easily have a real time OS with non real time applications as in batch processing.
For example, in a bank system I've worked for, their threshold was 1.5 second so most interactive transactions usually went under .5 second. Thus the application reacted in real time according to specs but ran on a multitasking system which allowed thousands of simultaneous transactions.
So to consider the embedded system to work in real time, it depends both on hardware performance and on software optimization to meet the requirements.
2006-10-07 06:44:24 · answer #2 · answered by juliepelletier 7 · 0⤊ 0⤋
A realtime operating system (RTOS) typically has tasks that run at different priorities, with task swtiching initiated by interrupts. It is designed so you can guarantee the response time to an event will be prdictable and exact. So, for instance, if you are controlling a machine, and you have to get things done at a certain time to match the movements of the machine.
2006-10-07 06:19:47 · answer #3 · answered by Ken H 4 · 0⤊ 0⤋
a real time operating system emphasises on the response time .
it does not give importance to cpu management or memory management.
the site below will help in ur presentation
2006-10-07 06:24:07 · answer #4 · answered by arpit k 2 · 0⤊ 0⤋