Difference between revisions of "Memory page"
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Size of memory page is architecture and operating system dependant. On an x86 and x86_64 hardware, memory page is equal to 4KB. On an Intel Itanium (IA64) memory page size is 16KB. | Size of memory page is architecture and operating system dependant. On an x86 and x86_64 hardware, memory page is equal to 4KB. On an Intel Itanium (IA64) memory page size is 16KB. | ||
| + | |||
| + | You can get the actual value on your Linux/UNIX system with the '''getpagesize'''-Syscall. Here is a C Program that prints the pagesize on your system : | ||
| + | |||
| + | <code> | ||
| + | #include <unistd.h> | ||
| + | #include <stdio.h> | ||
| + | |||
| + | int main(int argc, char* argv[]) | ||
| + | { | ||
| + | long sz = sysconf(_SC_PAGESIZE); | ||
| + | printf("memory pagesize on this box : %i\n", sz); | ||
| + | return 0; | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | compile with : gcc -o getpagesize getpagesize.c | ||
| + | |||
[[Category:Definitions]] | [[Category:Definitions]] | ||
Revision as of 00:34, 13 December 2006
Memory page is a range of consecutive addresses in the virtual address space whose size is a power of two. Those virtual addresses are translated in a corresponding range of consecutive physical addresses. The memory referenced by such a range is called a page.
Size of memory page is architecture and operating system dependant. On an x86 and x86_64 hardware, memory page is equal to 4KB. On an Intel Itanium (IA64) memory page size is 16KB.
You can get the actual value on your Linux/UNIX system with the getpagesize-Syscall. Here is a C Program that prints the pagesize on your system :
- include <unistd.h>
- include <stdio.h>
int main(int argc, char* argv[])
{
long sz = sysconf(_SC_PAGESIZE);
printf("memory pagesize on this box : %i\n", sz);
return 0;
}
compile with : gcc -o getpagesize getpagesize.c
