1. 源码文件
为了方便自己的使用，我完成了该代码，由两部分构成:
<pre class="has">
# -- coding:utf-8 --
from multiprocessing import cpu_count
!/usr/bin/env python
import os,time
last_worktime=0
last_idletime=0
def get_cpu():
global last_worktime,last_idletime
f=open("/proc/stat","r")
line=""
while not "cpu " in line: line=f.readline()
f.close()
spl=line.split(" ")
worktime=int(spl[2])+int(spl[3])+int(spl[4])
idletime=int(spl[5])
dworktime=(worktime-last_worktime)
didletime=(idletime-last_idletime)
rate=float(dworktime)/(didletime+dworktime)
last_worktime=worktime
last_idletime=idletime
if(last_worktime==0): return 0
return rate
def get_mem_usage_percent():
try:
f = open('/proc/meminfo','r')
for line in f:
if line.startswith('MemTotal:'):
mem_total = int(line.split()[1])
elif line.startswith('MemFree:'):
mem_free = int(line.split()[1])
elif line.startswith('Buffers:'):
mem_buffer = int(line.split()[1])
elif line.startswith('Cached:'):
mem_cache = int(line.split()[1])
elif line.startswith('SwapTotal:'):
vmem_total = int(line.split()[1])
elif line.startswith('SwapFree:'):
vmem_free = int(line.split()[1])
else:
continue
f.close()
except:
return None
physical_percent = usage_percent(mem_total - (mem_free + mem_buffer + mem_cache),mem_total)
virtual_percent = 0
if vmem_total > 0:
virtual_percent = usage_percent((vmem_total - vmem_free),vmem_total)
return physical_percent,virtual_percent
def usage_percent(use,total):
try:
ret = (float(use) / total) * 100
except ZeroDivisionError:
raise Exception("ERROR - zero division error")
return ret
if name == "main":
cpucount = "内核数： %s" % cpu_count() + " "
statvfs = os.statvfs('/')
# total_disk_space = statvfs.f_frsize * statvfs.f_blocks
# free_disk_space = statvfs.f_frsize * statvfs.f_bfree
# disk_usage = (total_disk_space - free_disk_space) * 100.0 / total_disk_space
# disk_usage = int(disk_usage)
# disk_tip = "硬盘空间使用率：" + str(disk_usage) + "% "
mem_usage = get_mem_usage_percent()
mem_usage = int(mem_usage[0])
mem_tip = "物理内存使用率：" + str(mem_usage) + "% "
<a href="/tag/cpu/" target="_blank" class="keywords">cpu</a>_usage = int(get_<a href="/tag/cpu/" target="_blank" class="keywords">cpu</a>() * 100)
<a href="/tag/cpu/" target="_blank" class="keywords">cpu</a>_tip = "<a href="/tag/cpu/" target="_blank" class="keywords">cpu</a>使用率：" + str(<a href="/tag/cpu/" target="_blank" class="keywords">cpu</a>_usage) + "% "
load_average = os.getloadavg()
load_tip = "系统<a href="/tag/fuzai/" target="_blank" class="keywords">负载</a>" + str(load_average)
print(<a href="/tag/cpu/" target="_blank" class="keywords">cpu</a>count + mem_tip + <a href="/tag/cpu/" target="_blank" class="keywords">cpu</a>_tip + load_tip)</code></pre>说明：参考了网上资源（）
（2）CPU_usage.sh代码：
<pre class="has">
for k in $(seq 2 96)
do
ssh cluster@AiLab${k} "hostname && cd ~ $$ sh CPU_usage.sh"
done
说明：我的集群节点是2到92，把编号改为你自己的集群节点编号。
2. 使用命令
最开始我是用原始的“sh CPU_usage.sh”来执行命令，实在是不方便。
于是研究了一下怎么把命令改为自定义命令。
后来找到~/.bashrc，在里面添加了alias命令自定义名字，偶然看到网上另一个教程（），改变了注意。
资源里说：
“bashrc 中有一句话
# You may want to put all your additions into a separate file like
# ~/.bash_aliases,instead of adding them here directly.
就是说可以另外新建一个文件用于专门存放自己的alias信息”
于是，可以这样来做：
<pre class="has">
$ cd ~
$ vi .bash_aliases
在文件中输入自己想设置的命令：
<pre class="has">
alias usageinfo='cd ~ && sh cpu_info.sh'
然后:wq保存退出，用下面命令激活：
<pre class="has">
$ source .bashrc
接下来，在任何目录下输入”usageinfo“，都可以方便地查看集群节点信息了。
by CS青雀
2018年7月26日