何謂RTOS?

webber_you

RTOS的定義及架構為何?是否有參考資料可提供

jacky002

http://en.wikipedia.org/wiki/Real-time_operating_system

A real-time operating system (RTOS) is a multitasking operating system intended for real-time applications. Such applications include embedded systems (programmable thermostats, household appliance controllers, mobile telephones), industrial robots, spacecraft, industrial control (see SCADA), and scientific research equipment.

8 c: K, o- v$ D: A$ B, M$ z: A2 WAn RTOS facilitates the creation of a real-time system, but does not guarantee the final result will be real-time; this requires correct development of the software. An RTOS does not necessarily have high throughput; rather, an RTOS provides facilities which, if used properly, guarantee deadlines can be met generally (soft real-time) or deterministically (hard real-time). An RTOS will typically use specialized scheduling algorithms in order to provide the real-time developer with the tools necessary to produce deterministic behavior in the final system. An RTOS is valued more for how quickly and/or predictably it can respond to a particular event than for the given amount of work it can perform over time. Key factors in an RTOS are therefore a minimal interrupt latency and a minimal thread switching latency.

0 |$ }% t/ m, O- URTOS說到架構就有點難說明，你必須要清楚為何要使用RTOS在你的device作為軟體執行系統架構的核心。每個RTOS的架構都會有所差異，舉個簡例:MontaVista強調真正的Realtime的效能，其他的就不再贅述了。
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[ 本帖最後由 jacky002 於 2008-1-26 09:54 PM 編輯 ]