[Sugar-devel] [PATCH sugar v2] Add cpu and memory resource indicator to frame
Anish Mangal
anishmangal2002 at gmail.com
Tue Jan 25 22:14:33 EST 2011
pushed to dx/mainline [1]
[1] http://git.sugarlabs.org/dextrose/mainline/commit/1cd4c31cd474bb84985fff97ac5f5b9e693469db
On Sat, Jan 22, 2011 at 09:38, Sascha Silbe <sascha-pgp at silbe.org> wrote:
> From: anishmangal2002 <anishmangal2002 at gmail.com>
>
> This patch adds an icon to the frame, whose palette
> menu displays the memory and cpu resources. For computing
> free memory, the code reads the /proc/meminfo file (thanks
> quozl) and for computing cpu usage, the code reads the
> /proc/stat file.
>
> The frame icon is updated after every 5 seconds if required.
> Similarly, the palette menu entries are updated after every
> 5 seconds as well.
>
> Signed-off-by: anishmangal2002 <anishmangal2002 at gmail.com>
> [style fixes, increase weight of memory utilisation for "system mood" so
> bursts of CPU activity don't take us from "happy" directly to "sad";
> pop up on left click since there is no primary action]
> Signed-off-by: Sascha Silbe <sascha-pgp at silbe.org>
> Reviewed-by: Sascha Silbe <sascha-pgp at silbe.org>
> ---
> v1->v2: pop up palette on left click
>
> extensions/deviceicon/Makefile.am | 1 +
> extensions/deviceicon/resources.py | 215 ++++++++++++++++++++++++++++++++++++
> po/POTFILES.in | 1 +
> 3 files changed, 217 insertions(+), 0 deletions(-)
>
> diff --git a/extensions/deviceicon/Makefile.am b/extensions/deviceicon/Makefile.am
> index 118d866..0d15c38 100644
> --- a/extensions/deviceicon/Makefile.am
> +++ b/extensions/deviceicon/Makefile.am
> @@ -4,6 +4,7 @@ sugar_PYTHON = \
> __init__.py \
> battery.py \
> network.py \
> + resources.py \
> speaker.py \
> touchpad.py \
> volume.py
> diff --git a/extensions/deviceicon/resources.py b/extensions/deviceicon/resources.py
> new file mode 100644
> index 0000000..65e00dc
> --- /dev/null
> +++ b/extensions/deviceicon/resources.py
> @@ -0,0 +1,215 @@
> +# Copyright (C) Anish Mangal <anishmangal2002 at 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
> +
> +from gettext import gettext as _
> +import logging
> +import os
> +
> +import gobject
> +import gtk
> +import gconf
> +
> +from sugar.graphics.tray import TrayIcon
> +from sugar.graphics.xocolor import XoColor
> +from sugar.graphics.palette import Palette
> +from sugar.graphics import style
> +
> +
> +_SYSTEM_MOODS = ['-sad', '-normal', '-happy']
> +_ICON_NAME = 'computer'
> +_UPDATE_INTERVAL = 5*1000
> +
> +
> +class DeviceView(TrayIcon):
> +
> + FRAME_POSITION_RELATIVE = 500
> +
> + def __init__(self):
> + client = gconf.client_get_default()
> + self._color = XoColor(client.get_string('/desktop/sugar/user/color'))
> + TrayIcon.__init__(self, icon_name=_ICON_NAME, xo_color=self._color)
> + self.create_palette()
> + self._icon_widget.connect('button-release-event', self._click_cb)
> +
> + def create_palette(self):
> + self.palette = ResourcePalette(_('System resources'))
> + self.palette.set_group_id('frame')
> + self.palette.add_timer()
> + self.palette.connect('system-mood-changed',
> + self._system_mood_changed_cb)
> + return self.palette
> +
> + def _system_mood_changed_cb(self, palette_, mood):
> + self.icon.props.icon_name = _ICON_NAME + mood
> +
> + def _click_cb(self, widget, event):
> + self.palette_invoker.notify_right_click()
> +
> +
> +class ResourcePalette(Palette):
> + __gsignals__ = {
> + 'system-mood-changed': (gobject.SIGNAL_RUN_FIRST,
> + gobject.TYPE_NONE,
> + ([str])),
> + }
> +
> + def __init__(self, primary_text):
> + Palette.__init__(self, label=primary_text)
> +
> + self.vbox = gtk.VBox()
> + self.set_content(self.vbox)
> +
> + self._cpu_text = gtk.Label()
> + self.vbox.pack_start(self._cpu_text, padding=style.DEFAULT_PADDING)
> + self._cpu_bar = gtk.ProgressBar()
> + self._cpu_bar.set_size_request(
> + style.zoom(style.GRID_CELL_SIZE * 4), -1)
> + self.vbox.pack_start(self._cpu_bar, padding=style.DEFAULT_PADDING)
> +
> + self._memory_text = gtk.Label()
> + self.vbox.pack_start(self._memory_text, padding=style.DEFAULT_PADDING)
> + self._memory_bar = gtk.ProgressBar()
> + self._memory_bar.set_size_request(
> + style.zoom(style.GRID_CELL_SIZE * 4), -1)
> + self.vbox.pack_start(self._memory_bar, padding=style.DEFAULT_PADDING)
> +
> + self._system_mood = None
> + try:
> + self._cpu_times = self._get_cpu_times_list()
> + except IOError:
> + logging.exception('An error ocurred while attempting to '
> + 'read /proc/stat')
> + self._stop_computing_statistics()
> +
> + self.vbox.show()
> + self._cpu_text.show()
> + self._cpu_bar.show()
> + self._memory_text.show()
> + self._memory_bar.show()
> +
> + def add_timer(self):
> + gobject.timeout_add(_UPDATE_INTERVAL, self.__timer_cb)
> +
> + def _get_cpu_times_list(self):
> + """Return various cpu times as read from /proc/stat
> +
> + This method returns the following cpu times measured
> + in jiffies (1/100 of a second for x86 systems)
> + as an ordered list of numbers - [user, nice,
> + system, idle, iowait] where,
> +
> + user: normal processes executing in user mode
> + nice: niced processes executing in user mode
> + system: processes executing in kernel mode
> + idle: twiddling thumbs
> + iowait: waiting for I/O to complete
> +
> + Note: For systems having 2 or more CPU's, the above
> + numbers would be the cumulative sum of these times
> + for all CPU's present in the system.
> +
> + """
> + return [int(count)
> + for count in file('/proc/stat').readline().split()[1:6]]
> +
> + def _percentage_cpu_available(self):
> + """
> + Return free CPU resources as a percentage
> +
> + """
> + _cpu_times_new = self._get_cpu_times_list()
> + _cpu_times_current = [(new - old)
> + for new, old in zip(_cpu_times_new, self._cpu_times)]
> + user_, nice_, system_, idle, iowait = _cpu_times_current
> + cpu_free = (idle + iowait) * 100.0 / sum(_cpu_times_current)
> + self._cpu_times = self._get_cpu_times_list()
> + return cpu_free
> +
> + def _percentage_memory_available(self):
> + """
> + Return free memory as a percentage
> +
> + """
> + for line in file('/proc/meminfo'):
> + name, value, unit_ = line.split()[:3]
> + if 'MemTotal:' == name:
> + total = int(value)
> + elif 'MemFree:' == name:
> + free = int(value)
> + elif 'Buffers:' == name:
> + buffers = int(value)
> + elif 'Cached:' == name:
> + cached = int(value)
> + elif 'Active:' == name:
> + break
> + return (free + buffers + cached) * 100.0 / total
> +
> + def __timer_cb(self):
> + try:
> + cpu_in_use = 100 - self._percentage_cpu_available()
> + memory_in_use = 100 - self._percentage_memory_available()
> + except IOError:
> + logging.exception('An error ocurred while trying to '
> + 'retrieve resource usage statistics')
> + self._stop_and_show_error()
> + return False
> + else:
> + self._cpu_text.set_label(_('CPU in use: %d%%' % cpu_in_use))
> + self._cpu_bar.set_fraction(float(cpu_in_use) / 100)
> + self._memory_text.set_label(_('Memory in use: %d%%' %
> + memory_in_use))
> + self._memory_bar.set_fraction(float(memory_in_use) / 100)
> +
> + # both cpu_free and memory_free lie between 0-100
> + system_mood = _SYSTEM_MOODS[
> + int(300 - (cpu_in_use + 2 * memory_in_use)) // 100]
> +
> + # check if self._system_mood exists
> + try:
> + if self._system_mood != system_mood:
> + self.emit('system-mood-changed', system_mood)
> + self._system_mood = system_mood
> + except AttributeError:
> + self.emit('system-mood-changed', system_mood)
> + self._system_mood = system_mood
> +
> + return True
> +
> + def _stop_and_show_error(self):
> + """
> + Stop computing usage statistics and display an error message
> + since we've hit an exception.
> +
> + """
> + # Use the existing _cpu_text label to display the error. Remove
> + # everything else.
> + self._cpu_text.set_size_request(
> + style.zoom(style.GRID_CELL_SIZE * 4), -1)
> + self._cpu_text.set_line_wrap(True)
> + self._cpu_text.set_text(_('Cannot compute CPU and memory usage '
> + 'statistics!'))
> + self.vbox.remove(self._cpu_bar)
> + self.vbox.remove(self._memory_text)
> + self.vbox.remove(self._memory_bar)
> + self.emit('system-mood-changed', '-error')
> +
> +
> +def setup(tray):
> + if not (os.path.exists('/proc/stat') and os.path.exists('/proc/meminfo')):
> + logging.warning('Either /proc/stat or /proc/meminfo not present. Not '
> + 'adding the CPU and memory usage icon to the frame')
> + return
> + tray.add_device(DeviceView())
> diff --git a/po/POTFILES.in b/po/POTFILES.in
> index 9e46831..b799339 100644
> --- a/po/POTFILES.in
> +++ b/po/POTFILES.in
> @@ -27,6 +27,7 @@ extensions/cpsection/updater/__init__.py
> extensions/cpsection/updater/view.py
> extensions/deviceicon/battery.py
> extensions/deviceicon/network.py
> +extensions/deviceicon/resources.py
> extensions/deviceicon/speaker.py
> extensions/deviceicon/touchpad.py
> extensions/deviceicon/volume.py
> --
> 1.7.2.3
>
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>
--
Anish
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