Memory Mapped Files In Os

It can be simply treated as a large array. The os splits the memory mapped file into pages (similar to process pages) and loads the requested pages into physical memory on demand. Therefore, for all above reason, some os s have provided a way to map the files into the address space of a running process.

Therefore, for all above reason, some os s have provided a way to map the files into the address space of a running process. It can be simply treated as a large array. Alternatively, we can use the virtual memory techniques discussed so far to treat file i/o as routine memory accesses.

This means reading or writing to those areas of memory causes the file to be read or written.

Generation of logical address cpu generates logical address for each page of the process. Linux does this via the mmap system call. This source file makes use of windows or posix headers depending on the user's operating system. Therefore, for all above reason, some oss have provided a way to map the files into the address space of a running process.