.TH "KDK_RTI_GET_MEM_RES_USAGE_KIB" 3 "Mon Sep 18 2023" "Linux Programmer's Manual" \"
.SH NAME
kdk_rti_get_mem_res_usage_KiB - 获取物理内存使用大小
.SH SYNOPSIS
.nf
.B #include <libkyrtinfo.h>
.sp
.BI "extern unsigned long kdk_rti_get_mem_res_usage_KiB();" 
.sp
Link with \fI\-lkyrtinfo\fP.
.SH "Detailed Description"
The main function of the interface is to obtain the physical memory usage size, note that Buffer/Cache is counted as used memory.
.SH "RETURN VALUE"
On success, returns the physical memory usage size of type unsigned long; The unit is KiB.
.PP
On error, return
.BR 0.
.SH EXAMPLES
.EX
#include "libkyrtinfo.h"
#include <stdio.h>

int main()
{
    printf("内存总大小：%lu KiB\n", kdk_rti_get_mem_res_total_KiB());
    printf("当前已用内存：%lu KiB，%f\n", kdk_rti_get_mem_res_usage_KiB(), kdk_rti_get_mem_res_usage_percent());
    printf("当前空闲内存：%lu KiB\n", kdk_rti_get_mem_res_free_KiB());
    printf("可用内存大小：%lu KiB\n", kdk_rti_get_mem_res_available_KiB());
    printf("应用总申请虚拟内存大小：%lu KiB\n", kdk_rti_get_mem_virt_alloc_KiB());
    printf("交换分区总量：%lu KiB\n", kdk_rti_get_mem_swap_total_KiB());
    printf("交换分区已用量：%lu KiB, %f\n", kdk_rti_get_mem_swap_usage_KiB(), kdk_rti_get_mem_swap_usage_percent());
    printf("交换分区剩余大小：%lu KiB\n", kdk_rti_get_mem_swap_free_KiB());
    printf("当前CPU使用率：%f\n", kdk_rti_get_cpu_current_usage());
    unsigned int day, hour, min, sec;
    kdk_rti_get_uptime(&day, &hour, &min, &sec);
    printf("开机时长：%u天%u小时%u分钟%u秒\n", day, hour, min, sec);
    return 0;
}

.SH "CONFORMING TO"
These functions are as per the withdrawn POSIX.1e draft specification.
The following functions are Linux extensions:
.BR kdk_rti_get_mem_res_total_KiB (),
.BR kdk_rti_get_mem_res_usage_percent (),
.BR kdk_rti_get_mem_res_available_KiB (),
.BR kdk_rti_get_mem_res_free_KiB (),
.BR kdk_rti_get_mem_virt_alloc_KiB (),
.BR kdk_rti_get_mem_swap_total_KiB (),
.BR kdk_rti_get_mem_swap_usage_percent (),
.BR kdk_rti_get_mem_swap_usage_KiB (),
.BR kdk_rti_get_mem_swap_free_KiB (),
.BR kdk_rti_get_cpu_current_usage ()
and
.BR kdk_rti_get_uptime ().
.SH "SEE ALSO"
.BR kdk_rti_get_mem_res_total_KiB (3),
.BR kdk_rti_get_mem_res_usage_percent (3),
.BR kdk_rti_get_mem_res_available_KiB (3),
.BR kdk_rti_get_mem_res_free_KiB (3),
.BR kdk_rti_get_mem_virt_alloc_KiB (3),
.BR kdk_rti_get_mem_swap_total_KiB (),
.BR kdk_rti_get_mem_swap_usage_percent (3),
.BR kdk_rti_get_mem_swap_usage_KiB (3),
.BR kdk_rti_get_mem_swap_free_KiB (3),
.BR kdk_rti_get_cpu_current_usage (3)
and
.BR kdk_rti_get_uptime (3).