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.
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<br />
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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 :
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<pre>
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#include <unistd.h>
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#include <stdio.h>
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int main(int argc, char* argv[])
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{
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        long sz = sysconf(_SC_PAGESIZE);
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        printf("memory pagesize on this box : %i\n", sz);
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        return 0;
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}
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</pre>
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compile with :
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<pre>
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gcc -o getpagesize getpagesize.c
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</pre>
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You can get the page size in GNU/Linux from a terminal or shell:
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getconf PAGE_SIZE
  
 
[[Category:Definitions]]
 
[[Category:Definitions]]

Latest revision as of 10:42, 23 November 2011

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

You can get the page size in GNU/Linux from a terminal or shell:

getconf PAGE_SIZE