NAME

kdk_rti_get_cpu_current_usage - 获取CPU瞬时使用率

SYNOPSIS

#include <libkyrtinfo.h>

extern float kdk_rti_get_cpu_current_usage();

Link with -lkyrtinfo.

Detailed Description

The main function of the interface is to obtain the instantaneous CPU usage rate.

RETURN VALUE

On success, returns the instantaneous CPU usage rate of type float.

On error, return 0.

EXAMPLES

#include "libkyrtinfo.h"
#include <stdio.h>
int main()
{
    printf("内存总大小：%lu KiB0, kdk_rti_get_mem_res_total_KiB());
    printf("当前已用内存：%lu KiB，%f0, kdk_rti_get_mem_res_usage_KiB(), kdk_rti_get_mem_res_usage_percent());
    printf("当前空闲内存：%lu KiB0, kdk_rti_get_mem_res_free_KiB());
    printf("可用内存大小：%lu KiB0, kdk_rti_get_mem_res_available_KiB());
    printf("应用总申请虚拟内存大小：%lu KiB0, kdk_rti_get_mem_virt_alloc_KiB());
    printf("交换分区总量：%lu KiB0, kdk_rti_get_mem_swap_total_KiB());
    printf("交换分区已用量：%lu KiB, %f0, kdk_rti_get_mem_swap_usage_KiB(), kdk_rti_get_mem_swap_usage_percent());
    printf("交换分区剩余大小：%lu KiB0, kdk_rti_get_mem_swap_free_KiB());
    printf("当前CPU使用率：%f0, 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0, day, hour, min, sec);
    return 0;
}

CONFORMING TO

These functions are as per the withdrawn POSIX.1e draft specification. The following functions are Linux extensions: kdk_rti_get_mem_res_total_KiB(), kdk_rti_get_mem_res_usage_percent(), kdk_rti_get_mem_res_usage_KiB(), kdk_rti_get_mem_res_available_KiB(), kdk_rti_get_mem_res_free_KiB(), kdk_rti_get_mem_virt_alloc_KiB(), kdk_rti_get_mem_swap_total_KiB(), kdk_rti_get_mem_swap_usage_percent(), kdk_rti_get_mem_swap_usage_KiB(), kdk_rti_get_mem_swap_free_KiB() and kdk_rti_get_uptime().