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这篇文章给大家分享的是有关如何获取树莓派cpu温度、cpu使用率、内存使用率的内容。小编觉得挺实用的,因此分享给大家做个参考,一起跟随小编过来看看吧。
代码片段:
<%@ page language="java" pageEncoding="utf-8" import="java.io.BufferedReader, java.io.FileReader, java.util.*"%> <%--statebar info start--%> <%-- -function:get memery usage -method:(read /proc/meminfo) -calculation: total memery = MemTotal mem free = MemFree + Buffers + Cached mem usage = MemTotal - mem free --%> <% FileReader fr_mem_usage=new FileReader("/proc/meminfo"); BufferedReader br_mem_usage=new BufferedReader(fr_mem_usage); String s_mem_total=br_mem_usage.readLine(); String s_mem_free=br_mem_usage.readLine(); String s_mem_buffers=br_mem_usage.readLine(); String s_mem_cached=br_mem_usage.readLine(); String[] s_mem_total_array = s_mem_total.split("\\s+"); String[] s_mem_free_array = s_mem_free.split("\\s+"); String[] s_mem_buffers_array = s_mem_buffers.split("\\s+"); String[] s_mem_cached_array = s_mem_cached.split("\\s+"); int mem_total = Integer.parseInt(s_mem_total_array[1]); int mem_free = Integer.parseInt(s_mem_free_array[1]); int mem_buffers = Integer.parseInt(s_mem_buffers_array[1]); int mem_cached = Integer.parseInt(s_mem_cached_array[1]); int memUsage = 100 - (100 * (mem_free + mem_buffers + mem_cached) / mem_total); fr_mem_usage.close(); br_mem_usage.close(); %> <%-- -function:get cpu usage -method:(read /proc/stat) -calculation: CPU total time=user+nice+system+idle+iowait+irq+softirq cpu usage=(idle2-idle1)/(cpu2-cpu1)*100 OR cpu usage=[(user_2 +sys_2+nice_2) - (user_1 + sys_1+nice_1)]/(total_2 - total_1)*100 --%> <% FileReader fr_cpu_usage1=new FileReader("/proc/stat"); BufferedReader br_cpu_usage1=new BufferedReader(fr_cpu_usage1); String s_cpu_usage1=br_cpu_usage1.readLine(); String[] s_cpu_usage_array1 = s_cpu_usage1.split("\\s+"); int f_cpu_usage_array1[] = new int[7]; for(int i=1;i<=7;i++){ f_cpu_usage_array1[i-1] = Integer.parseInt(s_cpu_usage_array1[i]); } fr_cpu_usage1.close(); br_cpu_usage1.close(); Thread.sleep(100); FileReader fr_cpu_usage2=new FileReader("/proc/stat"); BufferedReader br_cpu_usage2=new BufferedReader(fr_cpu_usage2); String s_cpu_usage2=br_cpu_usage2.readLine(); String[] s_cpu_usage_array2 = s_cpu_usage2.split("\\s+"); int f_cpu_usage_array2[] = new int[7]; for(int i=1;i<=7;i++){ f_cpu_usage_array2[i-1] = Integer.parseInt(s_cpu_usage_array2[i]); } fr_cpu_usage2.close(); br_cpu_usage2.close(); int cputotal1=0,cputotal2=0,idle1=0,idle2=0,cpuUsage=0; for(int i=0;i<=6;i++){ cputotal1 = cputotal1 + f_cpu_usage_array1[i]; } for(int i=0;i<=6;i++){ cputotal2 = cputotal2 + f_cpu_usage_array2[i]; } idle1 = f_cpu_usage_array1[3]; idle2 = f_cpu_usage_array2[3]; cpuUsage = 100 - (100 * (idle2 - idle1)/(cputotal2 - cputotal1)); %> <%-- -function:get cpu temperature -method:(read /sys/class/thermal/thermal_zone0/temp) -calculation: actual temperature = number_you_read / 1000 --%> <% FileReader fr=new FileReader("/sys/class/thermal/thermal_zone0/temp"); BufferedReader br=new BufferedReader(fr); String s=br.readLine(); int temp = (Integer.parseInt(s))/1000; fr.close(); br.close(); %> <%--statebar info end--%>
感谢各位的阅读!关于“如何获取树莓派cpu温度、cpu使用率、内存使用率”这篇文章就分享到这里了,希望以上内容可以对大家有一定的帮助,让大家可以学到更多知识,如果觉得文章不错,可以把它分享出去让更多的人看到吧!
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