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linux在嵌入式的應(yīng)用外文翻譯-其他專(zhuān)業(yè)-wenkub.com

2025-01-15 06:42 本頁(yè)面
   

【正文】 t module. Even so, also should be taken from the work of others on the basis of the allocation to begin your work, because their version of the source is perfectly legal, but also be encouraged. Real time Linux Many embedded systems need to realworld events can be predicted, and limited response. Such a system include factory automation, data acquisition and control system, audio / video applications, as well as many other puter products and equipment. What is real time system? The generally accepted realtime performance is defined, the real world time must be identified, predictable, and within a relatively short time interval in response. Although Linux is not a realtime operating system ( Linux cores do not provide the required priority and preemption features ), but currently a few expansion options available, these options to bring realtime ability based on Linux system, the most mon method is the double kernel method. Using this method, the general ( real time) OS running as a realtime kernel of a task. General purpose operating system such as disk read / write, LAN / munication, serial / parallel I / O, system initialization, memory management functions, and the realtime kernel processing period of world events. You can see this as both, because it maintains the popular general operating system benefits, and increasing the realtime ability of OS. Linux, you can keep with the standard Linux patibility, and non interference mode adds realtime function. Of course, also can inquiry and modify Linux, change into a realtime operating system, because it is the source of publicly available, but if you do, you will face such serious shortings, namely whether characteristics, or the driver can not synchronize with the mainstream Linux. Jane39。 support for 32bit ultrahighspeed CPUs。 Linux 是一個(gè)操作系統(tǒng),它擔(dān)當(dāng)計(jì)算機(jī)系統(tǒng)硬件與軟件間的通信服務(wù), Linux內(nèi)核包含了你在任何操作系統(tǒng)所期望的所有特性。你可以把這個(gè)看作兩者兼得,因?yàn)樗軌虮3至餍械耐ㄓ貌僮飨到y(tǒng)好處,而增加了實(shí)時(shí) OS 的能力。什么是“實(shí)時(shí)系統(tǒng) ” ?通常接受的“實(shí)時(shí)”性能的定義是,現(xiàn)實(shí)世界時(shí)間必須在確定的、可預(yù)測(cè)的,以及在相對(duì)短的時(shí)間間隔內(nèi)得到響應(yīng)。 你也可能選擇建立你自己喜歡的嵌入式 Linux,從一個(gè)標(biāo)準(zhǔn)分發(fā)版開(kāi)始,略去不要的模塊。 小 Linux 對(duì)許多嵌入式系統(tǒng),為了適應(yīng)諸如 RAM、固態(tài)盤(pán)、處理機(jī)速度,以及功耗的約束,嵌入的 Linux 的主要任務(wù)是,使系統(tǒng)所需的資源最小。 Linux是不是像 Windows 那樣太大以及需要系統(tǒng)資源太多,以致不能滿(mǎn)足嵌入式系統(tǒng)的約束要求呢?與 Windows 不同, Linux 本來(lái)就是模塊化的,并且能夠很容易縮減成緊縮配置,這種配置幾乎與 DOS 差不多大,甚至能放到一張軟盤(pán)上。 開(kāi)發(fā)人員做什么? 幸運(yùn)的是 ,一種新的、令人興奮的選擇系統(tǒng)已經(jīng)出現(xiàn):開(kāi)放源碼 Linux。 因?yàn)檫x擇范圍很小,嵌入式系統(tǒng)的開(kāi)發(fā)商面臨這樣的一種困境: 一方面,今天高度復(fù)雜的,且授權(quán)的智能嵌入式 系統(tǒng)(基于最新的芯片和硬件性能)所需要的正式流行的高檔操作系統(tǒng)(如 Windows)提供的那種能力、精致性,以及通用性。 另外也考慮到硬件和芯片迅速加速的革新步伐 —— 伴隨著老設(shè)備相當(dāng)快地淘汰。 另一方面,具 有新的或修改特性的操作系統(tǒng)定制版本,在日后可能出現(xiàn)與更新的版本或購(gòu)買(mǎi)的應(yīng)用程序不兼容的問(wèn)題。它用 C 語(yǔ)言編寫(xiě),而不用匯編語(yǔ)言,使用 UNIX 能移植到不同的體系結(jié)構(gòu)上。 二進(jìn)制兼容性 UNIX 的銷(xiāo)售者以某種羨慕的心情關(guān)注著 DOS 世界中可能的大量簡(jiǎn)裝應(yīng)用程序,并承諾不同系統(tǒng)的二進(jìn)制兼容的應(yīng)用程序即將
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