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

% y" q+ L2 N1 }3 ?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.

An 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.
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RTOS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。

[ 本帖最後由 jacky002 於 2008-1-26 09:54 PM 編輯 ]