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Original URL: http://www.cnblogs.com/geneil/archive/2011/12/08/2281367.htmlI. Unified addressing and independent addressingThis part comes from: http://blog.chinaunix.net/space.php?uid=21347954&do=blog&id=443670, thanks to Mason_hu for sharing.From

For details about the/dev/null and/dev/zero files, and solutions for accidental deletion of/dev/null and/dev/zero, and the disk I/O Testing Method Using/dev/zero, disk deletion and recovery by mistake1. Introduction-explanation from

http://www.cnblogs.com/geneil/archive/2011/12/08/2281367.html I. Unified address and independent addressing This part comes from: http://blog.chinaunix.net/space.php?uid=21347954&do=blog&id=443670, thanks to Mason_hu's sharing.From the CPU to a

Introduction:The most common input/output (I/O) model in Linux is synchronous I/O. In this model, when a request is sent, the application blocks until the request is met. This is a good solution because no central processing unit (CPU) is required

The most common input/output (I/O) model in Linux is synchronous I/O. In this model, when a request is sent, the application blocks until the request is met. This is a good solution because no central processing unit (CPU) is required when calling

Original: http://www.ibm.com/developerworks/cn/linux/l-async/The most common input/output (I/O) model in Linux® is synchronous I/O. In this model, when a request is made, the application blocks until the request is satisfied. This is a good solution

Read this IOCP tutorial. I will first give the definition of IOCP, then give its implementation method, and finally analyze an Echo program to open the IOCP puzzle cloud for you, remove your worries about IOCP. OK, but I cannot guarantee that you

Detailed description of/dev/null and/dev/zero files, solutions for accidental deletion of/dev/null and/dev/zero, and disk I/O testing using/dev/zero1. Introduction-explanation from Wikipedia/dev/null: In Unix-like systems,/dev/null, or an empty

Asynchronous device I/O is suitable for large data volumes and high performance scenarios, such as servers. To use Asynchronous device I/O, when calling createfile to open or create a device, make the parameter dwflagsandattributes include file_falg_

 First look at the following section of code output what:#include int main () { int *p=null; printf ("%s", p); }Output , single-step debugging you can see that the value of executing int *p=null,p is 0x00000000, as you can see, NULL is 0 in