sugar-toolkit-gtk3/services/console/interface/xo/cpu.py

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##!/usr/bin/env python
# Copyright (C) 2007, Eduardo Silva (edsiper@gmail.com).
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import os
import sys
import gtk
import string
import gobject
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import cairo
import procmem
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from graphics.frequency import HorizontalGraphic
class CPU_Usage:
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_CPU_HZ = 0
_last_jiffies = 0
_times = 0
def __init__(self):
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self._CPU_HZ = os.sysconf(2)
def _get_CPU_data(self):
# Uptime info
stat_file = "/proc/stat"
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try:
infile = file(stat_file, "r")
except:
print "Error trying uptime file"
return -1
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stat_line = infile.readline()
cpu_info = string.split(stat_line, ' ')
infile.close()
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return cpu_info
def _get_CPU_usage(self):
cpu_info = self._get_CPU_data()
used_jiffies = (int(cpu_info[2]) + int(cpu_info[3]) + int(cpu_info[4]))
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if self._times ==0:
self._last_jiffies = used_jiffies
self._times +=1
return 0
new_ujiffies = (used_jiffies - self._last_jiffies)
new_ajiffies = ((self.frequency/1000) * self._CPU_HZ)
if new_ajiffies <= 0:
pcpu = 0.0
else:
pcpu = ((new_ujiffies*100)/new_ajiffies)
if pcpu >100:
pcpu = 100
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self._times +=1
self._last_jiffies = used_jiffies
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return pcpu
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class XO_CPU(gtk.Frame):
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_frequency_timer = 1
def __init__(self):
gtk.Frame.__init__(self, 'System CPU Usage')
self.set_border_width(10)
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width = (gtk.gdk.screen_width() * 99 / 100) - 50
height = (gtk.gdk.screen_height() * 15 / 100) - 20
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# Create graphic
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self._graphic = HorizontalGraphic()
self._graphic.set_size_request(width, height)
fixed = gtk.Fixed()
fixed.set_border_width(10)
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fixed.add(self._graphic)
self.add(fixed)
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self._DRW_CPU = CPU_Usage()
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self._DRW_CPU.frequency = 1000 # 1 Second
gobject.timeout_add(self._DRW_CPU.frequency, self._update_cpu_usage)
def _update_cpu_usage(self):
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print "update XO CPU"
self._cpu = self._DRW_CPU._get_CPU_usage()
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self.set_label('System CPU Usage: ' + str(self._cpu) + '%')
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# Draw the value into the graphic
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self._graphic.draw_value(self._cpu)
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return True