How to use the glances.timer.Counter function in Glances

def start(config, args):
    """Start Glances."""

    # Load mode
    global mode

    start_duration = Counter()

    if core.is_standalone():
        from glances.standalone import GlancesStandalone as GlancesMode
    elif core.is_client():
        if core.is_client_browser():
            from glances.client_browser import GlancesClientBrowser as GlancesMode
        else:
            from glances.client import GlancesClient as GlancesMode
    elif core.is_server():
        from glances.server import GlancesServer as GlancesMode
    elif core.is_webserver():
        from glances.webserver import GlancesWebServer as GlancesMode

    # Init the mode
    logger.info("Start {} mode".format(GlancesMode.__name__))
    mode = GlancesMode(config=config, args=args)

def load_plugins(self, args=None):
        """Load all plugins in the 'plugins' folder."""
        start_duration = Counter()
        for item in os.listdir(plugins_path):
            if (item.startswith(self.header) and
                    item.endswith(".py") and
                    item != (self.header + "plugin.py")):
                # Load the plugin
                start_duration.reset()
                self._load_plugin(os.path.basename(item),
                                  args=args, config=self.config)
                logger.debug("Plugin {} started in {} seconds".format(item,
                                                                      start_duration.get()))

        # Log plugins list
        logger.debug("Active plugins list: {}".format(self.getPluginsList()))

def __serve_forever(self):
        """Main loop for the CLI.

        return True if we should continue (no exit key has been pressed)
        """
        # Start a counter used to compute the time needed for
        # update and export the stats
        counter = Counter()

        # Update stats
        self.stats.update()
        logger.debug('Stats updated duration: {} seconds'.format(counter.get()))

        # Export stats
        counter_export = Counter()
        self.stats.export(self.stats)
        logger.debug('Stats exported duration: {} seconds'.format(counter_export.get()))

        # Patch for issue1326 to avoid < 0 refresh
        adapted_refresh = self.refresh_time - counter.get()
        adapted_refresh = adapted_refresh if adapted_refresh > 0 else 0

        # Display stats
        # and wait refresh_time - counter
        if not self.quiet:
            # The update function return True if an exit key 'q' or 'ESC'
            # has been pressed.
            ret = not self.screen.update(self.stats, duration=adapted_refresh)
        else:
            # Nothing is displayed
            # Break should be done via a signal (CTRL-C)

def update(self):
        """Wrapper method to update the stats."""
        # For standalone and server modes
        # For each plugins, call the update method
        for p in self._plugins:
            if self._plugins[p].is_disable():
                # If current plugin is disable
                # then continue to next plugin
                continue
            start_duration = Counter()
            # Update the stats...
            self._plugins[p].update()
            # ... the history
            self._plugins[p].update_stats_history()
            # ... and the views
            self._plugins[p].update_views()
            # logger.debug("Plugin {} update duration: {} seconds".format(p,

def __serve_forever(self):
        """Main loop for the CLI.

        return True if we should continue (no exit key has been pressed)
        """
        # Start a counter used to compute the time needed for
        # update and export the stats
        counter = Counter()

        # Update stats
        self.stats.update()
        logger.debug('Stats updated duration: {} seconds'.format(counter.get()))

        # Export stats
        counter_export = Counter()
        self.stats.export(self.stats)
        logger.debug('Stats exported duration: {} seconds'.format(counter_export.get()))

        # Patch for issue1326 to avoid < 0 refresh
        adapted_refresh = self.refresh_time - counter.get()
        adapted_refresh = adapted_refresh if adapted_refresh > 0 else 0

        # Display stats
        # and wait refresh_time - counter

timeout_opt = '-t'
            count_opt = '-c'
        else:
            # Linux and co...
            timeout_opt = '-W'
            count_opt = '-c'
        # Build the command line
        # Note: Only string are allowed
        cmd = ['ping',
               count_opt, '1',
               timeout_opt, str(self._resolv_name(port['timeout'])),
               self._resolv_name(port['host'])]
        fnull = open(os.devnull, 'w')

        try:
            counter = Counter()
            ret = subprocess.check_call(cmd, stdout=fnull, stderr=fnull, close_fds=True)
            if ret == 0:
                port['status'] = counter.get()
            else:
                port['status'] = False
        except subprocess.CalledProcessError as e:
            # Correct issue #1084: No Offline status for timeouted ports
            port['status'] = False
        except Exception as e:
            logger.debug("{}: Error while pinging host {} ({})".format(self.plugin_name, port['host'], e))

        return ret

def _port_scan_tcp(self, port):
        """Scan the (TCP) port structure (dict) and update the status key."""
        ret = None

        # Create and configure the scanning socket
        try:
            socket.setdefaulttimeout(port['timeout'])
            _socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        except Exception as e:
            logger.debug("{}: Error while creating scanning socket".format(self.plugin_name))

        # Scan port
        ip = self._resolv_name(port['host'])
        counter = Counter()
        try:
            ret = _socket.connect_ex((ip, int(port['port'])))
        except Exception as e:
            logger.debug("{}: Error while scanning port {} ({})".format(self.plugin_name, port, e))
        else:
            if ret == 0:
                port['status'] = counter.get()
            else:
                port['status'] = False
        finally:
            _socket.close()

        return ret