open mmap file

Shared memory can be said to be the most useful way to communicate between processes and the fastest form of IPC. Two different processes A, B shared memory means that the same physical memory is mapped to process A, B's respective process address

 Shared Memory-memory ing MMAP Shared memory is the most useful method for inter-process communication and the fastest IPC format. The shared memory of two different processes A and B means that the same physical memory is mapped to the process

SELF: http://hi.baidu.com/flying5/blog good blog, you can go to have a look Linux MMAP File Memory ing mechanism MMAP: Memory Map When talking about the concept of file ing, it is inevitable that virtual memory (SVR 4 VM) is involved. In fact,File

Mmap Basic ConceptsMmap is a memory-mapped file method that maps a file or other object to the address space of a process, implementing a one by one-mapping relationship between the file disk address and a virtual address in the process virtual

The previous article learned about shared memory: http://www.cnblogs.com/charlesblc/p/6142139.htmlAccording to this http://blog.chinaunix.net/uid-26335251-id-3493125.htmlOne more article:1. Shared memory allows two or more processes to share a given

Memory mapping is one of the most interesting features of modern Unix systems. As for drivers, memory mappings can be implemented to provide direct access to device memory by user programs. A clear example of a mmap usage can be seen from a subset

Note: The android underlying malloc is swapped for mmap to get memory, the acquired memory can be added to the tag, so that the meminfo for analysis, you can view the memory of the tag separately for analysis.One. Mmap system call1. Mmap system

Reprinted from Http://blog.chinaunix.net/uid-26669729-id-3077015.htmlOne. Mmap system call1. Mmap system callMmap maps a file or other object into memory. Files are mapped to multiple pages, and if the size of the file is not the sum of the size of

Forwarded by: Http://blog.chinaunix.net/uid-26669729-id-3077015.htmlMmap detailed description of Linux memory managementOne. Mmap system call1. Mmap system callMmap maps a file or other object into memory. Files are mapped to multiple pages, and if

One. Mmap system call1. Mmap system callMmap maps a file or other object into memory. Files are mapped to multiple pages, and if the size of the file is not the sum of the size of all pages, the space that is not used by the last page will be zeroed