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[操作应用] 惊异!多核心CPU太复杂拖慢软件

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惊异!多核心CPU太复杂拖慢软件

电脑的中央处理器(CPU)速度愈快,执行软件的速度反而越慢,这种事有可能吗?当然有,而且已经严重威胁全球电脑厂商的商机。以英特尔(Intel)为首的厂商近年来推陈出新,多核心(multicore)处理器逐渐成为市场主流,然而问题是:这种处理器的概念太新、架构太复杂,导致程序设计师根本无法利用它的效能。8 j% s3 ^1 b0 ]% ^# P. N

& [) j+ {! W( \! h2 b5 }美国斯坦福大学电脑科学教授欧路克腾指出:“如果我是电脑厂商,我会惊慌失措,因为解决方案到现在连影子都没有……这是一大危机,我认为业界对这个问题做得太少、做得太迟。”领导微软公司软件开发的研究与策略长蒙蒂也表示,多核心技术是“近代电脑运算史上概念变化程度最大的变化。”- M# C* ~) g; n+ a
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简而言之,多核心处理器就是将两个以上的独立处理器封装在同一个IC中,双核心与四核心的版本早已问世,成为市场主流。英特尔最新一代的六核心处理器“Dunnington”预计今年下半年上市。另一家大厂AMD积极开发八核心的整合型处理器“Montreal”,可望在明年下半年推出。; u' L* \8 E% @( `5 k- R1 D8 |
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然而专家指出,四核心处理器执行一般人常用的软件时,并不会比上一个级别的产品快。更糟的是,六核心以上的版本反而会拖慢这些软件的速度。
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问题关键在于,多核心处理器的架构是过去只见于超级电脑的平行运算(parallelcomputing),对程序设计师而言是一大挑战,他们必须将过去由单一处理器负责的程序化整为零,分散到各个处理器进行运算。以怀孕来打比方,传统作法是让一位孕妇怀胎九月,生下一个宝宝;多核心作法却是由九位孕妇同时上阵,每人各怀孕一个月,再将九个人的成果“整合”成一个宝宝。
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) |+ l7 A3 ^' k2 w不过仍有厂商保持乐观,相信巨大的经济利益将促使最佳解决方案脱颖而出。微软的蒙蒂表示,一旦突破难关,电脑业也将迈入效能突飞猛进的新境界
想启航,份缔造,海相聚

我们拥有同一个天空;脚踩同一片土地;愿我们拥有同一块心灵的净土!

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双核已经很满足啦!

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引用:
原帖由 yjb338 于 2008-8-25 21:56 发表
4 y$ p2 m& G& C- v+ C双核已经很满足啦!
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应该三核是满足的了~~2 r. U& [: d& A6 U: c" k
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双核对于要压片时等后台长驻任务就觉得不是太够了
想启航,份缔造,海相聚

我们拥有同一个天空;脚踩同一片土地;愿我们拥有同一块心灵的净土!

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个人认为多核并不算进步,搞一个强劲的单核出来就差不多

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究竟多核心还是少核心好啊?

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但是我总觉得多核心快点的

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发新话题
3G mobile phone applications of the times change (B) ... ... with the development of the business model changes

  In June 2006, Motorola NEC, NTT DoCoMo, Samsung Electronics and Vodafone, and other companies started to build a smart phone for the reunification of the Linux platform. In January 2007, the smart phone operating system provider Symbian official in Beijing announced the establishment of the China branch. In the past 3 years, the Chinese market for Symbian has created a global share of 10%. In February 2007, Microsoft announced that South Korean handset maker LG Electronics and Japanese mobile operator Soft Bank to become its Windows Mobile operating system, cell phone customers. ... ... In the global smart phone behind the rapid growth, several major mobile phone operating system, the forces of "one-third of the world," the pattern is rapidly brewing in the new variables. The dramatic changes in the market, will also gradually on the mobile phone application software development and business model have a profound impact.

  Symbian: by providing the flexibility to customize the user interface framework to enable mobile phone manufacturers to introduce a different style interface. To the core Symbian, Nokia has developed S40, S60, S80, and so on a variety of operating systems and applications, to authorize the use of other companies. With many years of accumulation of technology, Symbian smartphones in the area with the highest market share. The main camp of its major vendors including Nokia, Arima, BenQ, Fujitsu, Lenovo, LG, Ericsson, Mitsubishi, Panasonic, Samsung, Sharp, Sony Ericsson and so on. At present, Symbian has set up branch offices in China, is about to launch the industry, specifically for Chinese engineers to develop the institutions of Symbian certification exam, as well as China's Symbian developer community to provide training and support, including the provision of the Chinese developers and materials Local developers, and other activities. A number of independent developers such as China's grand digital red, and so on, has become certified through the Symbian joint development partners.

  Linux: The system is due to the Open Source (open source) features in favor of independent developers to develop high utilization of hardware, powerful mobile applications, and the full realization of low-cost control. Moreover, Linux system will also facilitate enterprise mobile applications and their close connection with the application of a variety of industries, and develop their own security, controlled certification system. Motorola is currently the most important mobile Linux a strong supporter of the (recent reference to the popular A1200 "Ming" smartphone series), the camp also includes NEC, Panasonic, Samsung, NTT DoCoMo, Vodafone and so on. The Linux-based smartphone currently occupy second place market share, making Symbian strong challenger. However, the standardization of mobile Linux has not been a good solution, which will over time lead to Linux-based mobile phone third-party software development is restricted.

  Windows Mobile: the PC operating system monopoly of Microsoft, including Smart Phone and Pocket PC Phone two-level platform. Usually corresponds to the phone hardware (CPU, memory, memory card) high performance strong. Its main camp, including Microsoft, Dopod, Palm, Sony Ericsson, Samsung, HTC, LG, Soft Bank, and so on. At present, most of the vendors are beginning to try to add support for Windows Mobile, and Microsoft Windows Mobile will be as part of its overall corporate strategy, trying to build across the mobile, PC, home appliances, such as the Internet's new multi-platform industrial chain. Windows Mobile is also the current market share is very small, but it does not prevent it from becoming one of the most threatening rivals.

  We can see that some companies (such as LG Electronics) for a variety of platforms have been taken inclusive. In addition to this manufacturer's own wait-and-see factor, also indicates that the petition must show a number of the next operating system have equal shares of common prosperity emerged. RIM, including the Black Berry, the iPhone, Apple Mac OS platform, and other than the closed, nor rule out the possibility that one day China will enter the open door policy and strategy might be.

  At present, Chinese mobile phone software applications to a single treasure chest of K-Java-based games. Follow the development model of its mobile operators to develop value-added business development of the SP standards by the CP (usually phones Game Studios) design and development, to the SP operation, and then through the Treasure Box Monternet platform announced. This is a relatively simple development model, this model can not be denied that laid the cornerstone of the treasure chest of business for the 2.5G mobile value-added services has created tremendous value. However, if the 3G mobile application platform on the environment, it has three problems: First, the developers did not face the end-user demand; Secondly, the developer is not involved in the operation of the product; Third, the development of In the types of products, product features and so on to great limitations. All these problems will greatly limit the 3G mobile phone applications.

  The era of 3G mobile application software development and operations, will be in the following four areas show significant features:

Diversified platform:

  Independent developers (ISV) will no longer be faced only by mobile operators to develop a simple SP value-added business development standards, but to meet the needs of the corresponding development of the smart phone operating system provider of product development norms. In my experience over the Symbian platform game research and development, Nokia and has studied the development of SGR thickness of the dozens of pages of documents (Standard Game Requirement), well aware of the product development of such norms in the complexity of the mobile operators with a simple business norms SP There are several orders of magnitude difference. Once the product development of standards by the operating system provider available, the industry chain is bound to focus on the shift took place, mobile operators and providers of the operating system it will then start the game. For example, to manufacturers such as Nokia's Symbian-based alliance on a global scale has been set up large community of software developers, and the official certification of the Symbian software for the establishment of a threshold issue, at the same time brought together a group of elite partners in development cooperation.

Product transition to the service:

  3G mobile application platform on the CP and SP, it will become increasingly blurred the boundaries between. With the mobile phone software, more and more areas are Online features, traditional stand-alone software development model will be totally subversive, as the original developer of the CP will be increasingly forced to operate into the product to work. This is not just the 3G features, and is also the world's software industry development trend of a unified, that is, from "selling products" to "sell" the change. Taking a panoramic view of the Chinese game industry, in essence, has achieved the first game from the stand-alone products to the online game service changes. In "SaaS" (Software As A Service) driven by the tide, the software itself will be increasingly free of charge, and profit model will gradually shift by service charges. QQ's IM software features are provided free of charge, but the QQ Show, casual games such as the need to pay value-added services, it is an excellent case in point. In this mode, CP and the SP boundaries have disappeared, product development and service providers must assume the same role, and to market directly to end-users in charge.

The inter-network integration:


  The next-generation mobile phone applications and tend to become more PC / Internet application integration, and complement each other to form the symbiotic relationship. Nokia's executive vice president and CTO Outai Luo has said publicly: "The first priority is to embrace the Internet." With the phone's functions by simply gradually communication (Communication) to the terminal complex computing (Computing) terminal change, and the PC / Internet integration will become the trend of the times. We have a little look at recent major high-end mobile phone business of advertising, will find mobile Office suite, mobile MSN / QQ client often become the focus of the eye-catching. Microsoft's Windows Mobile operating system is through with the PC version of Windows and Office suite of highly compatible and rapidly seize market share. Integration of these applications do not even need through mobile operator's network, and only by USB, Bluetooth, infrared or Wi-Fi can be achieved with Internet connections. Nokia has introduced support for the Wi-Fi phone products, and the support of a section of the mobile phone application Skype is also alleged to have come out.

Mixed market segments:

  The era of 3G mobile phone applications is a must for the breakdown of Nagao high (Long Tail) market, therefore the form of software will show a high degree of alienation mixed. As the cell phone privacy, and other characteristics of each end-user will need a high degree of personalized custom software products. Faced with such a chaotic market demand, the traditional top-down management system and software categories will be overwhelmed and collapse, with the need to become agile and software will be provided to create a new market model. For example, users may need a fully integrated Google map and Flickr photo-sharing "mash" services, according to the traditional tree of your software system will be very difficult to be attributed to a particular category. Has been up-and-coming Pica, thumb, and other software are sky is the case. At the same time, high-precision camera, streaming media players, GPS positioning module components, such as the introduction of mobile phones will make the application of increasingly complex patterns, and a high degree of flexibility to integrate a variety of hardware and software resources.

  All of the above changes, in fact, has been in the 2.5G era in the late can see the shape. For example, the recent popular mobile phone software Pica (PICA), met at the same time: support for the smart phone operating system, the development and operation of unity, the Internet and IM interoperability, features a variety of "mix" (instant messaging, VoIP, blog, , ... ...) And so on all the features. Although Pica, and other free services is not in the mobile operator SP supervision, but this is the real market demand driven by the mobile operators themselves have to face this sooner or later.