67 lines
2.5 KiB
Groff
67 lines
2.5 KiB
Groff
.TH "KDK_RTI_GET_CPU_CURRENT_USAGE" 3 "Mon Sep 18 2023" "Linux Programmer's Manual" \"
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.SH NAME
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kdk_rti_get_cpu_current_usage - 获取CPU瞬时使用率
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.SH SYNOPSIS
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.nf
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.B #include <libkyrtinfo.h>
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.sp
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.BI "extern float kdk_rti_get_cpu_current_usage();"
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.sp
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Link with \fI\-lkyrtinfo\fP.
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.SH "Detailed Description"
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The main function of the interface is to obtain the instantaneous CPU usage rate.
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.SH "RETURN VALUE"
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On success, returns the instantaneous CPU usage rate of type float.
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.PP
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On error, return
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.BR 0.
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.SH EXAMPLES
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.EX
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#include "libkyrtinfo.h"
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#include <stdio.h>
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int main()
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{
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printf("内存总大小：%lu KiB\n", kdk_rti_get_mem_res_total_KiB());
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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());
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printf("当前空闲内存：%lu KiB\n", kdk_rti_get_mem_res_free_KiB());
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printf("可用内存大小：%lu KiB\n", kdk_rti_get_mem_res_available_KiB());
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printf("应用总申请虚拟内存大小：%lu KiB\n", kdk_rti_get_mem_virt_alloc_KiB());
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printf("交换分区总量：%lu KiB\n", kdk_rti_get_mem_swap_total_KiB());
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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());
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printf("交换分区剩余大小：%lu KiB\n", kdk_rti_get_mem_swap_free_KiB());
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printf("当前CPU使用率：%f\n", kdk_rti_get_cpu_current_usage());
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unsigned int day, hour, min, sec;
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kdk_rti_get_uptime(&day, &hour, &min, &sec);
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printf("开机时长：%u天%u小时%u分钟%u秒\n", day, hour, min, sec);
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return 0;
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}
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.SH "CONFORMING TO"
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These functions are as per the withdrawn POSIX.1e draft specification.
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The following functions are Linux extensions:
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.BR kdk_rti_get_mem_res_total_KiB (),
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.BR kdk_rti_get_mem_res_usage_percent (),
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.BR kdk_rti_get_mem_res_usage_KiB (),
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.BR kdk_rti_get_mem_res_available_KiB (),
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.BR kdk_rti_get_mem_res_free_KiB (),
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.BR kdk_rti_get_mem_virt_alloc_KiB (),
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.BR kdk_rti_get_mem_swap_total_KiB (),
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.BR kdk_rti_get_mem_swap_usage_percent (),
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.BR kdk_rti_get_mem_swap_usage_KiB (),
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.BR kdk_rti_get_mem_swap_free_KiB ()
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and
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.BR kdk_rti_get_uptime ().
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.SH "SEE ALSO"
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.BR kdk_rti_get_mem_res_total_KiB (3),
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.BR kdk_rti_get_mem_res_usage_percent (3),
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.BR kdk_rti_get_mem_res_usage_KiB (3),
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.BR kdk_rti_get_mem_res_available_KiB (3),
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.BR kdk_rti_get_mem_res_free_KiB (3),
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.BR kdk_rti_get_mem_virt_alloc_KiB (),
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.BR kdk_rti_get_mem_swap_total_KiB (3),
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.BR kdk_rti_get_mem_swap_usage_percent (3),
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.BR kdk_rti_get_mem_swap_usage_KiB (3),
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.BR kdk_rti_get_mem_swap_free_KiB (3)
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and
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.BR kdk_rti_get_uptime (3). |