Linux 获取内存页大小

如何查看Linux系统的内存页大小：
1. getconf PAGESIZE/PAGE_SIZE  返回值单位为Bytes

[root@localhost nginx-1.8.0]# getconf PAGESIZE
4096
[root@localhost nginx-1.8.0]# getconf PAGE_SIZE
4096

2. 通过c函数获取
  #include
   int getpagesize(void);返回值单位为Bytes

The  function  getpagesize() returns the number of bytes in a page, where a "page" is the thing used where it says in the description of mmap(2) that files are mapped in page-sized units.

       The size of the kind of pages that mmap() uses, is found using

              #include <unistd.h>
              long sz = sysconf(_SC_PAGESIZE);

       (where some systems also allow the synonym _SC_PAGE_SIZE for _SC_PAGESIZE), or

              #include <unistd.h>
              int sz = getpagesize()

pagesize.c

[root@localhost test]# more pagesize.c
#include <unistd.h>
#include <stdio.h>
int main(int argc, char *argv[])
{
    printf("linux page size is %d bytes\n",getpagesize());
    return 0;
}

编译运行：

[root@localhost test]# gcc -g pagesize.c -o pagesize -Wall
[root@localhost test]# ./pagesize
linux page size is 4096 bytes