函數(shù)原型：

NAME

sysconf - Get configuration information at runtime

SYNOPSIS

#include

long sysconf(int name);

#include

#include

#define ONE_MB (1024 * 1024)

int main (void)

{

long num_procs;

long page_size;

long num_pages;

long free_pages;

long long mem;

long long free_mem;

num_procs = sysconf(_SC_NPROCESSORS_ONLN)

num_procs = sysconf(_SC_NPROCESSORS_CONF);

printf ("CPU 個數(shù)為: %ld 個\n", num_procs);

page_size = sysconf (_SC_PAGESIZE);

printf ("系統(tǒng)頁面的大小為: %ld K\n", page_size / 1024 );

num_pages = sysconf (_SC_PHYS_PAGES);

printf ("系統(tǒng)中物理頁數(shù)個數(shù): %ld 個\n", num_pages);

free_pages = sysconf (_SC_AVPHYS_PAGES);

printf ("系統(tǒng)中可用的頁面?zhèn)€數(shù)為: %ld 個\n", free_pages);

mem = (long long) ((long long)num_pages * (long long)page_size);

mem /= ONE_MB;

free_mem = (long long)free_pages * (long long)page_size;

free_mem /= ONE_MB;

printf ("總共有 %lld MB 的物理內(nèi)存, 空閑的物理內(nèi)存有: %lld MB\n", mem, free_mem);

return (0);

}

標簽：sysconf,mem,long,num,free,linux,pages,系統(tǒng)配置

來源： https://blog.csdn.net/whatday/article/details/96732262

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