你们是否提供了根据不同处理器而定制的软件包？

[oneleaf]

Do you provide packages compiled with processor-specific optimisations?

Do you provide packages compiled with processor-specific optimisations? Where can I find them?

* Optimised kernels can be obtained by installing the linux-686, linux-k7, etc. packages. Search for "linux" with Synaptic, aptitude or apt-cache.
* An optimised C library is installed by default, in the libc6-i686 packages.
* Optimised cryptography routines for i586- and i686-class systems are included with the OpenSSL library and used automatically
* Ubuntu packages are generally built with nearly all generic compile-time optimisations which do not involve increasing code size (gcc -O2), except where the package maintainer deviates from this (for example, packages intended for debugging are often less optimised, as this eases debugging). Smaller code allows better utilisation of cache memory.
* Ubuntu packages for the i386 architecture are compiled using the i486 instruction set (-march=i486), with instruction choices based on the Pentium 4 processor (-mcpu=pentium4). This combination provides benefits for modern processors without sacrificing compatibility with older and embedded devices.

A comprehensive experiment to evaluate the effectiveness of more aggressive processor optimisations for all Ubuntu packages is planned after the Warty release.

http://www.ubuntulinux.org/support/docu ... d-packages

[shooter]

你们是否提供了根据不同处理器而定制的软件包？

你们是否提供了根据不同处理器而定制的软件包？我能在哪里找到它们？

* 可以安装linux-686或linux-k7来获得定制过的内核。在Synaptic，aptitude和apt-cache中搜索“linux”可以得到更多信息。
* 在安装libc6-i686软件包过程中，会默认安装为其定制过的C程序库。
* 为i586或i686体系定制的密文系统中包括了OpenSSL库。
* Ubuntu软件包是根据最普遍情况（Generic）而编译完成的，不包括增加的代码（gcc -02），除非软件维护者有所要求（比如说，为了侦错而发行的软件包通常没有太多的定制内容，因为这样更容易侦错）。小规模的代码可以让程序运行在缓存中而得到更高的效率。
* 为i386体系结构定制的Ubuntu软件包使用了i486指令集（-march-i486），也能自行选择Pentium 4处理器的指令集（-mcpu=pentium4）。这种自由结合的方式让当今的处理器避免了为兼容老旧设备而牺牲性能的情况。

我们正在实验进一步的处理器定制，以此开发的Ubuntu软件将在Warty版本后推出。

http://www.ubuntulinux.org/support/docu ... d-packages

[oneleaf]

http://www.ubuntu.org.cn/docs/folder.20 ... ument_view

[millenniumdark]

这一类不放到wiki上