procstat.py

   1 #!/usr/bin/env/python
   2
   3 import time
   4
   5 old_idle = [0, 0, 0]
   6 old_busy = [0, 0, 0]
   7
   8 fp = open('/proc/stat', 'r')
   9 while True:
  10         while True:
  11                 idle = [0, 0, 0]
  12                 busy = [0, 0, 0]
  13                 line = fp.readline()
  14                 if not line:
  15                         break
  16                 if line.startswith('cpu'):
  17                         figures = line.split()
  18                         cpu = figures[0]
  19                         figures = map((lambda x: long(x)), figures[1:])
  20                         busy = figures[0] + figures[1] + figures[2]
  21                         idle = figures[3]
  22                         if len(figures) >= 7:
  23                                 idle += figures[4]
  24                                 busy += figures[5] + figures[6]
  25                         if len(figures) >= 8:
  26                                 busy += figures[7]
  27                         if cpu == 'cpu':
  28                                 cpu = 0
  29                         else:
  30                                 cpu = int(cpu[3:]) + 1
  31                         idle[cpu] = idle
  32                         busy[cpu] = busy
  33         for n in range(3):
  34                 if n == 0:
  35                         print "CPU A",
  36                 else:
  37                         print "CPU", n - 1,
  38                 print busy[cpu], ':', idle[cpu] + busy[cpu], ' = ', \
  39                         100 * busy[cpu] / (busy[cpu] + idle[cpu]), '%'
  40                 old_idle = idle
  41                 old_busy = busy
  42         time.sleep(1)
  43         fp.rewind()