nick |
linux | 2010-05-08
在Linux世界里，分为Page cache,Buffer cache两个层面。其中page cache包含了buffer cache，内存只和page cache交互。标准的LINUX总 是假定处理器有三级页表，分别为页目录表（PGD），中间页目录表（PMD）和页表(PTE)。如果程序在进行物理地址转换的时候，中是通过页目录表来索 引中间页目录表，再通过中间页目录表来索引页表，从而查找到某页与内存BL...
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Page Speed
What is Page Speed?
Page Speed is an open-source Firefox/Firebug Add-on. Webmasters and web developers can use Page Speed to evaluate the performance of their web pages and to get suggestions on how to improve them.
How does Page Speed work?
Page Speed performs several tests on a site’s web server co...
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