Data Prefetch(数据预读)技术对于改善CPU的性能发挥了重大的作用,大家可能记得在INTEL的 Pentium4处理器里也采用了这项技术,Pentium4处理器专门有若干S...
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在读取方面使用中间内核缓冲区,可以允许内核缓冲区在应用程序不需要内核缓冲区内的全部数据时,充当 “预读高速缓存(readahead cache)” 的角色。
Using the intermediate buffer on the read side allows the kernel buffer to act as a "readahead cache" when the application hasn't asked for as much data as the kernel buffer holds.
rw参数,使用它指明预抓取数据是为了执行读操作,还是执行写操作。
The rw parameter, which you use to indicate whether the data is being pulled in for Read or preparing for a Write operation.
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