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技术文摘：嵌入式Linux向中低端手机区域渗入尚欠火候

Although tycoon Motolora announces the mobile phone to regard a key as to develop the strategy Linux, chinese government also advocates native land manufacturer to operate Linux energetically, but a lot of industry and element of science and technology make although impetus of this one development is very good open science and technology still is in hard short-term inside leap up rises a mobile phone (especially in low end mobile phone) position of operating system mainstream. Linux support person an argument that often takes assail to have an operating system only opens gender and low cost namely, this already were accepted extensively for industry, but embedded the circumstance of area is widely divergent with desktop or server area after all, research and development of strong put oneself in another's position all the time and still singing leading role, embedded software especially embedded talent of research and development accumulates Linux software to still be not worth, company group experience of research and development returns inadequacy for opposite computation area, more or less do this make the open sex advantage of Linux still cannot get be developinged adequately here. Company of even if research and development group have very good originality and added him program module, but because lack unified environment and platform, because more or less this contains optional sex, the standardization of package still is a problem, go against large-scale promotion. And to holding application, although Linux is opposite what contrast at often be being taken is other a few kinds are not real time sex to only the operating system waits like Symbian, Palm, Windows Mobile, open sex (participate in rock-bottom design) , flexibility (modular framework) cost of accredit of taller, commerce is low also get much, but hind a few kinds have an operating system to have big wrist support only, also laid extensive tripartite and handlers foundation mostly, want shake their position or defeating them is by no means easy thing. This just still is in besides high end / the argue of smartphone market, well-known, high end / the share that smartphone market holds market of whole mobile phone is very small still. Linux wants to permeate a hand to manage facility in the round especially in the mobile phone, be faced with even a few more the following challenge: Above all, the mobile phone serves as a kind embedded applying system, demand of real time sex is very strong, the Linux that is not for real time application research and development inherently with respect to this still is done not quite well at present, although industry is using a few science and technology to improve embedded the real time sex of Linux, if MontaVista is direct modification Linux kernel, increase real time sex; Perhaps add texture of real time module, double kernel on common Linux kernel, wait like RTLinux, RTAI. Desktop and embedded supplier of platform of research and development of Linux application process is strange CTO Benoit Schillings of interesting science and technology says frankly: "What already won wide application at other relatively is embedded real time operating system if for OSE, Nucleus, although Linux has environment of powerful and rich research and development, but development still is not very mature, package Size is too big still, taller also to the requirement of processor. " so we can see, at present Linux mobile phone often uses two processor: One runs Linux, another runs the real time function such as base band. In bounds mobile phone getting with processor resource in memory space especially in machine of hotshot of low end result, demand of function of big, processor becomes software dimensions high undoubtedly for major obstacle, no less than opens lab of source code research and development (OSDL) expert Bill Weinberg once had said, the software that can support base band processor will conduce to Linux entering market of operating system of mobile phone mainstream. Additional, mix from economic power comsumption lengthen batteries to operate life to look as much " abstain from " the high frequency, high load capacity of processor moves. Next, urging shift application side, interior of Linux a group of people of same interest also is put in a few contradiction, if make the issue of uniform standard in the light of all sorts of component. How is Linux a group of people of same interest being advanced better at present oneself has all sorts of effort in the application of mobile area, be like " forum of Linux mobile phone " , of OSDL " mobile Linux plans " (MLI) . But " only KDE, GNOME operates system of unlike desktop Linux two kinds environment, mobile area case is complex much, too much person wants to unite the Linux of shift application, but more ginseng and, more difficult implementation is unified. Many companies were participated in embedded of Linux foundation frame build, some still is a competitor, so respective definition differs somewhat, this uniform to making standard causes very big trouble. " the Schillings of strange interesting science and technology plaints. Software is faster and faster to compositive increasing function, newer rate it is more and more important to hold equipment to appear, this is open, agile and what won't bring a design to restrain is embedded Linux brought very big turning point, but the analysis is current embedded in light of Linux operating system and the actor inferior position that its use place of platform of research and development to have, to gaining ground extensively, inferior position still one-up, remain the further effort of Linux a group of people of same interest.

尽管手机巨子摩托罗拉公布将Linux作为重点成长策略，中国政府也大力提倡外乡制造商操作Linux，但诸多工业和科技身分使得这一成长势头虽很好的开放科技仍难以在短期内蹿升到手机(尤其是中低端手机)操作系统支流地位。

Linux推戴者经常拿来报复专有操作系统的一个论据就是开放性和低本钱，这一点已为业界宽泛接管，但嵌入式区域的情况究竟与桌面或办事器区域判然不同，硬体研发一向而且仍旧在唱主角，嵌入式软件尤其是嵌入式Linux软件研发人才堆集还不足，社群研发经验相对计较区域来说还不足，这几多使得Linux的开放性劣势在这里还不克不迭获得充分阐扬。即便研发社群有很好的创意并添加了本身挨次模块，但因为不足统一的情况战争台，是以几多带有随意性，组件的尺度化仍是个问题，不利于大规模的推广。

而对于手持应用，当然Linux相对于常被拿来作难刁难比的其他几种非实时性专有操作系统如Symbian、Palm、Windows Mobile等，开放性(介入底层设计)、灵敏性(模块化架构)更高、商业受权费低也得多，但后几种专有操作系统都有大腕撑腰，也大都打下了宽泛的第三方和操作者根本，想要撼动它们的地位或打败它们绝非易事。况且这还只是在高端/智妙手机市场的较劲，众所周知，高端/智妙手机市场占整个手机市场的份额还很小。

Linux想要周全渗入到手持行动措施特别是手机中，还要面临以下一些挑战：

首先，手机作为一种嵌入式应用系统，实时性要求很是强，就这一点生成并非为实时应用而研发的Linux今朝仍旧做得不太好，尽管业界正操纵一些科技改良嵌入式Linux的实时性，如MontaVista间接点窜Linux内核、增添实时性；或者在通俗Linux内核之上增添实时模块、双内核结构，如RTLinux、RTAI等。

桌面和嵌入式Linux应用挨次研发平台供给商奇趣科技CTO Benoit Schillings就坦言：“相对于其它已获得宽泛应用的嵌入式实时操作系统如OSE、Nucleus来说，当然Linux领有强大而丰硕的研发情况，但成长还不是很成熟，组件Size仍旧过大，对措置器的要求也较高。”

所以咱们能够看到，今朝Linux手机往往采用两个措置器：一个运行Linux，另一个则运行基带等实时性能。在存储器空间和措置器资本受限的手机中特别是中低端功妙手机，软件规模大、措置器性能要求高无疑成为重大障碍，正如开放源代码研发尝试室(OSDL)专家Bill Weinberg曾经说过的，能够撑持基带措置器的软件将有助于Linux进入手机支流操作系统市场。此外，从节省功耗和耽误电池操作寿命来看也同样“隐讳”措置器的高频、高负荷运行。

其次，在敦促挪动应用方面，Linux阵营内部也存在一些矛盾，如针对各类组件拟定统一尺度的问题。今朝Linux阵营正就若何更好地促进本身在挪动通信区域的应用进行各类尽力，如“Linux手机论坛”、OSDL的“挪动Linux打算”(MLI)等。但“不像桌面Linux系统只有KDE、GNOME两种操作情况，挪动区域情况简单得多，太多的人想统一挪动应用的Linux，但越多人介入，就越难实现统一。不少公司都介入了嵌入式Linux根本框架的搭建，有的仍是竞争对手，所以各自的界说有所分歧，这对拟定统一尺度造成很大麻烦。”奇趣科技的Schillings感慨到。

软件对集成越来越多性能、更新速度越来越快的手持行动措施显得越来越主要，这为开放、灵敏且不会带来设计约束的嵌入式Linux带来了很大契机，但分析今朝嵌入式Linux操作系统及其应用研发平台所存在的口角势来看，对于宽泛遍及，劣势仍占优势，有待Linux阵营的进一步尽力。

发布日期：2009-8-4　【返回】