示例#1
0
class PlotNordic():

    def __init__(self, stream=None, event_close=None, log_lvl=logging.WARNING):
        plt.rcParams['toolbar'] = 'None'
        plt.ioff()
        self.plot_config = PlotNordicConfig
        self.draw_state = DrawState(
            self.plot_config['timeline_width_init'],
            self.plot_config['event_processing_rect_height'],
            self.plot_config['event_submit_markersize'])
        self.ani = None
        self.close_event_flag = False
        self.processed_events = ProcessedEvents()

        if stream is not None:
            timeouts = {
                'descriptions': 1,
                'events': 0
            }
            self.in_stream = stream
            self.in_stream.set_timeouts(timeouts)

        if event_close is not None:
            self.event_close = event_close

        self.logger = logging.getLogger('Plot Nordic')
        self.logger_console = logging.StreamHandler()
        self.logger.setLevel(log_lvl)
        self.log_format = logging.Formatter(
            '[%(levelname)s] %(name)s: %(message)s')
        self.logger_console.setFormatter(self.log_format)
        self.logger.addHandler(self.logger_console)


    def read_data_from_files(self, events_filename, events_types_filename):
        self.processed_events.read_data_from_files(
            events_filename, events_types_filename)
        if not self.processed_events.verify():
            self.logger.warning("Missing event descriptions")

    def on_click_start_stop(self, event):
        if self.draw_state.paused:
            if self.draw_state.l_line is not None:
                self.draw_state.l_line.remove()
                self.draw_state.l_line = None
                self.draw_state.l_line_coord = None

            if self.draw_state.r_line is not None:
                self.draw_state.r_line.remove()
                self.draw_state.r_line = None
                self.draw_state.r_line_coord = None

            if self.draw_state.duration_marker is not None:
                self.draw_state.duration_marker.remove()

        self.draw_state.paused = not self.draw_state.paused

    def _prepare_plot(self, selected_events_types):

        self.draw_state.ax = plt.gca()
        self.draw_state.ax.set_navigate(False)

        fig = plt.gcf()
        fig.set_size_inches(
            self.plot_config['window_width_inch'],
            self.plot_config['window_height_inch'],
            forward=True)
        fig.canvas.draw()

        plt.xlabel("Time [s]")
        plt.title("Custom events")
        plt.grid(True)

        minimum = min(selected_events_types)
        maximum = max(selected_events_types)
        ticks = []
        labels = []
        for j in selected_events_types:
            ticks.append(j)
            labels.append(self.processed_events.registered_events_types[j].name)
        plt.yticks(ticks, labels)

        # min and max range of y axis are bigger by one so markers fit nicely
        # on plot
        self.draw_state.y_max = maximum + 1
        self.draw_state.y_height = maximum - minimum + 2
        plt.ylim([minimum - 1, maximum + 1])

        self.draw_state.selected_event_textbox = self.draw_state.ax.text(
            0.05,
            0.95,
            self.draw_state.selected_event_text,
            fontsize=10,
            transform=self.draw_state.ax.transAxes,
            verticalalignment='top',
            bbox=dict(
                boxstyle='round',
                alpha=0.5,
                facecolor='linen'))
        self.draw_state.selected_event_textbox.set_visible(False)

        fig.canvas.mpl_connect('scroll_event', self.scroll_event)
        fig.canvas.mpl_connect('button_press_event', self.button_press_event)
        fig.canvas.mpl_connect('button_release_event',
                               self.button_release_event)
        fig.canvas.mpl_connect('resize_event', PlotNordic.resize_event)
        fig.canvas.mpl_connect('close_event', self.close_event)

        plt.tight_layout()

        return fig

    def _get_relative_coords(self, event):
        # relative position of plot - x0, y0, width, height
        ax_loc = self.draw_state.ax.get_position().bounds
        window_size = plt.gcf().get_size_inches() * \
            plt.gcf().dpi  # window size - width, height
        x_rel = (event.x - ax_loc[0] * window_size[0]) \
                 / ax_loc[2] / window_size[0]
        y_rel = (event.y - ax_loc[1] * window_size[1]) \
                 / ax_loc[3] / window_size[1]
        return x_rel, y_rel

    def scroll_event(self, event):
        x_rel, _ = self._get_relative_coords(event)

        if event.button == 'up':
            if self.draw_state.paused:
                self.draw_state.timeline_max = self.draw_state.timeline_max - (1 - x_rel) * \
                    (self.draw_state.timeline_width - self.draw_state.timeline_width *
                     self.plot_config['timeline_scale_factor'])
            self.draw_state.timeline_width = self.draw_state.timeline_width * \
                self.plot_config['timeline_scale_factor']

        if event.button == 'down':
            if self.draw_state.paused:
                self.draw_state.timeline_max = self.draw_state.timeline_max + (1 - x_rel) * \
                    (self.draw_state.timeline_width / self.plot_config['timeline_scale_factor'] -
                     self.draw_state.timeline_width)
            self.draw_state.timeline_width = self.draw_state.timeline_width / \
                self.plot_config['timeline_scale_factor']

        self.draw_state.ax.set_xlim(
            self.draw_state.timeline_max -
            self.draw_state.timeline_width,
            self.draw_state.timeline_max)
        plt.draw()

    def _find_closest_event(self, x_coord, y_coord):
        filtered_id = list(filter(lambda x: x.submit.type_id == round(y_coord),
                                    self.processed_events.tracked_events))
        if len(filtered_id) == 0:
            return None
        if not self.processed_events.is_event_tracked(round(y_coord)):
            dists = list(map(lambda x: abs(x.submit.timestamp - x_coord), filtered_id))
            return filtered_id[np.argmin(dists)]
        else:
            matching_processing = list(
                filter(
                    lambda x: x.proc_start_time < x_coord < x.proc_end_time,
                    filtered_id))
            if matching_processing:
                return matching_processing[0]
            dists = list(map(lambda x: min([abs(x.submit.timestamp - x_coord),
                                abs(x.proc_start_time - x_coord), abs(x.proc_end_time - x_coord)]), filtered_id))
            return filtered_id[np.argmin(dists)]

    @staticmethod
    def _stringify_time(time_seconds):
        if time_seconds > 0.1:
            return '%.5f' % (time_seconds) + ' s'

        return '%.5f' % (1000 * time_seconds) + ' ms'

    def button_press_event(self, event):
        x_rel, y_rel = self._get_relative_coords(event)

        if event.button == MouseButton.LEFT.value:
            self.draw_state.pan_x_start1 = x_rel

        if event.button == MouseButton.MIDDLE.value:
            if self.draw_state.selected_event_submit is not None:
                for i in self.draw_state.selected_event_submit:
                    i.remove()
                self.draw_state.selected_event_submit = None

            if self.draw_state.selected_event_processing is not None:
                self.draw_state.selected_event_processing.remove()
                self.draw_state.selected_event_processing = None

            self.draw_state.selected_event_textbox.set_visible(False)

            if x_rel > 1 or x_rel < 0 or y_rel > 1 or y_rel < 0:
                plt.draw()
                return

            coord_x = self.draw_state.timeline_max - \
                (1 - x_rel) * self.draw_state.timeline_width
            coord_y = self.draw_state.y_max - \
                (1 - y_rel) * self.draw_state.y_height
            selected_event = self._find_closest_event(coord_x, coord_y)
            if selected_event is None:
                return
            event_submit = selected_event.submit

            self.draw_state.selected_event_submit = self.draw_state.ax.plot(
                event_submit.timestamp,
                event_submit.type_id,
                markersize=2*self.draw_state.event_submit_markersize,
                color='g',
                marker='o',
                linestyle=' ')

            if selected_event.proc_start_time is not None:
                self.draw_state.selected_event_processing = matplotlib.patches.Rectangle(
                    (selected_event.proc_start_time,
                    selected_event.submit.type_id -
                    self.draw_state.event_processing_rect_height),
                    selected_event.proc_end_time -
                    selected_event.proc_start_time,
                    2*self.draw_state.event_processing_rect_height,
                    color='g')
                self.draw_state.ax.add_artist(
                    self.draw_state.selected_event_processing)

            self.draw_state.selected_event_text = \
                self.processed_events.registered_events_types[event_submit.type_id].name + '\n'
            self.draw_state.selected_event_text += 'Submit: ' + \
                PlotNordic._stringify_time(event_submit.timestamp) + '\n'

            if selected_event.proc_start_time is not None:
                self.draw_state.selected_event_text += 'Processing start: ' + \
                    PlotNordic._stringify_time(
                        selected_event.proc_start_time) + '\n'
                self.draw_state.selected_event_text += 'Processing end: ' + \
                    PlotNordic._stringify_time(
                        selected_event.proc_end_time) + '\n'
                self.draw_state.selected_event_text += 'Processing time: ' + \
                    PlotNordic._stringify_time(selected_event.proc_end_time - \
                        selected_event.proc_start_time) + '\n'

            ev_type = self.processed_events.registered_events_types[event_submit.type_id]

            for i in range(0, len(ev_type.data_descriptions)):
                if ev_type.data_descriptions[i] == EM_MEM_ADDRESS_DATA_DESC:
                    continue
                self.draw_state.selected_event_text += ev_type.data_descriptions[i] + ' = '
                self.draw_state.selected_event_text += str(event_submit.data[i]) + '\n'

            self.draw_state.selected_event_textbox.set_visible(True)
            self.draw_state.selected_event_textbox.set_text(
                self.draw_state.selected_event_text)

            plt.draw()

        if event.button == MouseButton.RIGHT.value:
            self.draw_state.pan_x_start2 = x_rel

    def button_release_event(self, event):
        x_rel, y_rel = self._get_relative_coords(event)

        if event.button == MouseButton.LEFT.value:
            if self.draw_state.paused:
                if abs(x_rel - self.draw_state.pan_x_start1) < 0.01:
                    if self.draw_state.l_line is not None:
                        self.draw_state.l_line.remove()
                        self.draw_state.l_line = None
                        self.draw_state.l_line_coord = None

                    if 0 <= x_rel <= 1:
                        if 0 <= y_rel <= 1:
                            self.draw_state.l_line_coord = self.draw_state.timeline_max - \
                                (1 - x_rel) * self.draw_state.timeline_width
                            self.draw_state.l_line = plt.axvline(
                                self.draw_state.l_line_coord)
                    plt.draw()

                else:
                    self.draw_state.timeline_max = self.draw_state.timeline_max - \
                        (x_rel - self.draw_state.pan_x_start1) * \
                        self.draw_state.timeline_width
                    self.draw_state.ax.set_xlim(
                        self.draw_state.timeline_max -
                        self.draw_state.timeline_width,
                        self.draw_state.timeline_max)
                    plt.draw()

        if event.button == MouseButton.RIGHT.value:
            if self.draw_state.paused:
                if abs(x_rel - self.draw_state.pan_x_start2) < 0.01:
                    if self.draw_state.r_line is not None:
                        self.draw_state.r_line.remove()
                        self.draw_state.r_line = None
                        self.draw_state.r_line_coord = None

                    if 0 <= x_rel <= 1:
                        if 0 <= y_rel <= 1:
                            self.draw_state.r_line_coord = self.draw_state.timeline_max - \
                                (1 - x_rel) * self.draw_state.timeline_width
                            self.draw_state.r_line = plt.axvline(
                                self.draw_state.r_line_coord, color='r')
                    plt.draw()

        if self.draw_state.r_line_coord is not None and self.draw_state.l_line_coord is not None:
            if self.draw_state.duration_marker is not None:
                self.draw_state.duration_marker.remove()
            bigger_coord = max(
                self.draw_state.r_line_coord,
                self.draw_state.l_line_coord)
            smaller_coord = min(
                self.draw_state.r_line_coord,
                self.draw_state.l_line_coord)
            self.draw_state.duration_marker = plt.annotate(
                text=PlotNordic._stringify_time(
                    bigger_coord - smaller_coord), xy=(
                    smaller_coord, 0.5), xytext=(
                    bigger_coord, 0.5), arrowprops=dict(
                    arrowstyle='<->'))
        else:
            if self.draw_state.duration_marker is not None:
                self.draw_state.duration_marker.remove()
                self.draw_state.duration_marker = None

    @staticmethod
    def resize_event(event):
        plt.tight_layout()

    def close_event(self, event):
        self.close_event_flag = True

    def animate_events_real_time(self, fig):
        rects = []
        events = []
        #Receive events
        while True:
            try:
                data = self.in_stream.recv_ev()
            except StreamError as err:
                if err.args[1] == StreamError.TIMEOUT_MSG:
                    break
                self.logger.error("Receiving error: {}. Exiting".format(err))
                self.close_event(None)
                sys.exit()
            data_str = data.decode()
            tracked_event = TrackedEvent.deserialize(data_str)

            events.append(tracked_event.submit)
            self.processed_events.tracked_events.append(tracked_event)

            if tracked_event.proc_start_time is not None:
                assert tracked_event.proc_end_time is not None
                rects.append(
                    matplotlib.patches.Rectangle(
                        (tracked_event.proc_start_time,
                            tracked_event.submit.type_id -
                            self.draw_state.event_processing_rect_height/2),
                        tracked_event.proc_end_time -
                        tracked_event.proc_start_time,
                        self.draw_state.event_processing_rect_height,
                        edgecolor='black'))

        # translating plot
        if not self.draw_state.synchronized_with_events:
            # ignore translating plot for stale events
            if not self.draw_state.stale_events_displayed:
                self.draw_state.stale_events_displayed = True
            else:
            # translate plot for new events
                if len(events) != 0:
                    self.draw_state.added_time = events[-1].timestamp - \
                                                   0.3 * self.draw_state.timeline_width
                    self.draw_state.synchronized_with_events = True

        if not self.draw_state.paused:
            self.draw_state.timeline_max = time.time() - self.start_time + \
                self.draw_state.added_time
            self.draw_state.ax.set_xlim(
                self.draw_state.timeline_max -
                self.draw_state.timeline_width,
                self.draw_state.timeline_max)

        # plotting events
        y = list(map(lambda x: x.type_id, events))
        x = list(map(lambda x: x.timestamp, events))
        self.draw_state.ax.plot(
            x,
            y,
            marker='o',
            linestyle=' ',
            color='r',
            markersize=self.draw_state.event_submit_markersize)

        self.draw_state.ax.add_collection(PatchCollection(rects))
        plt.gcf().canvas.flush_events()
        if self.event_close.is_set():
            self.close_event(None)
        if self.close_event_flag:
            sys.exit()

    def plot_events_real_time(self, selected_events_types=None):
        self.start_time = time.time()
        #Receive event descriptions
        while True:
            try:
                bytes = self.in_stream.recv_desc()
                break
            except StreamError as err:
                if err.args[1] == StreamError.TIMEOUT_MSG:
                    if self.event_close.is_set():
                        self.logger.info("Module closed before receiving event descriptions.")
                        sys.exit()
                    continue
                self.logger.error("Receiving error: {}. Exiting".format(err))
                sys.exit()
        data_str = bytes.decode()
        event_types_dict = json.loads(data_str)
        self.processed_events.registered_events_types = dict((int(k), EventType.deserialize(v))
                                                             for k, v in event_types_dict.items())
        if self.processed_events.registered_events_types is None:
            self.logger.error("Event descriptors not sent properly")
            sys.exit()
        if selected_events_types is None:
            selected_events_types = list(
                self.processed_events.registered_events_types.keys())

        fig = self._prepare_plot(selected_events_types)

        self.start_stop_ax = plt.axes([0.8, 0.025, 0.1, 0.04])
        self.start_stop_button = Button(self.start_stop_ax, 'Start/Stop')
        self.start_stop_button.on_clicked(self.on_click_start_stop)
        plt.sca(self.draw_state.ax)

        self.ani = animation.FuncAnimation(
            fig,
            self.animate_events_real_time,
            interval=self.plot_config['refresh_time'])
        plt.show()

    def plot_events_from_file(
            self, selected_events_types=None, one_line=False):
        self.draw_state.paused = True
        if len(self.processed_events.tracked_events) == 0 or \
                len(self.processed_events.registered_events_types) == 0:
            self.logger.error("Please read some events data before plotting")

        if selected_events_types is None:
            selected_events_types = list(
                self.processed_events.registered_events_types.keys())

        self._prepare_plot(selected_events_types)

        x = list(map(lambda x: x.submit.timestamp, self.processed_events.tracked_events))
        y = list(map(lambda x: x.submit.type_id, self.processed_events.tracked_events))
        self.draw_state.ax.plot(
            x,
            y,
            marker='o',
            linestyle=' ',
            color='r',
            markersize=self.draw_state.event_submit_markersize)

        rects = []
        for ev in self.processed_events.tracked_events:
            if ev.proc_start_time is None:
                continue
            rects.append(
                matplotlib.patches.Rectangle(
                    (ev.proc_start_time,
                        ev.submit.type_id - self.draw_state.event_processing_rect_height/2),
                        ev.proc_end_time - ev.proc_start_time,
                        self.draw_state.event_processing_rect_height,
                        edgecolor='black'))

        self.draw_state.ax.add_collection(PatchCollection(rects))

        self.draw_state.timeline_max = max(x) + 1
        self.draw_state.timeline_width = max(x) - min(x) + 2
        self.draw_state.ax.set_xlim([min(x) - 1, max(x) + 1])

        plt.draw()
        plt.show()
示例#2
0
def main():
    descr = "Merge data from Peripheral and Central. Synchronization events" \
            " should be registered at the beginning and at the end of" \
            " measurements (used to compensate clock drift)."
    parser = argparse.ArgumentParser(description=descr)
    parser.add_argument("peripheral_dataset", help="Name of Peripheral dataset")
    parser.add_argument("peripheral_sync_event",
                        help="Event used for synchronization - Peripheral")
    parser.add_argument("central_dataset", help="Name of Central dataset")
    parser.add_argument("central_sync_event",
                        help="Event used for synchronization - Central")
    parser.add_argument("result_dataset", help="Name for result dataset")
    args = parser.parse_args()

    evt_peripheral = ProcessedEvents()
    evt_peripheral.read_data_from_files(args.peripheral_dataset + ".csv",
                                        args.peripheral_dataset + ".json")

    evt_central = ProcessedEvents()
    evt_central.read_data_from_files(args.central_dataset + ".csv",
                                     args.central_dataset + ".json")

    # Compensating clock drift - based on synchronization events
    sync_evt_peripheral = evt_peripheral.get_event_type_id(args.peripheral_sync_event)
    sync_evt_central = evt_central.get_event_type_id(args.central_sync_event)

    sync_peripheral = list(filter(lambda x: x.submit.type_id == sync_evt_peripheral,
                                  evt_peripheral.tracked_events))

    sync_central = list(filter(lambda x: x.submit.type_id == sync_evt_central,
                               evt_central.tracked_events))

    ts_peripheral = np.array(list(map(lambda x: list([x.submit.timestamp, x.proc_start_time, x.proc_end_time]),
                                      evt_peripheral.tracked_events)))
    sync_ts_peripheral = list(map(lambda x: x.submit.timestamp, sync_peripheral))
    sync_ts_central = list(map(lambda x: x.submit.timestamp, sync_central))

    sync_diffs_central = np.subtract(sync_ts_central[1:], sync_ts_central[:-1])
    sync_diffs_peripheral = np.subtract(sync_ts_peripheral[1:], sync_ts_peripheral[:-1])

    rounded_diffs_central = list(map(lambda x: round(x, 1), sync_diffs_central))
    rounded_diffs_peripheral = list(map(lambda x: round(x, 1), sync_diffs_peripheral))

    shift_c = rounded_diffs_central.index(rounded_diffs_peripheral[0])
    shift_p = rounded_diffs_peripheral.index(rounded_diffs_central[0])

    if shift_c < shift_p:
        sync_ts_central = sync_ts_central[shift_c:]
    elif shift_p < shift_c:
        sync_ts_peripheral = sync_ts_peripheral[shift_p:]

    if len(sync_ts_central) < len(sync_ts_peripheral):
        sync_ts_peripheral = sync_ts_peripheral[:len(sync_ts_central)]
    elif len(sync_ts_peripheral) < len(sync_ts_central):
        sync_ts_central = sync_ts_central[:len(sync_ts_peripheral)]

    new_ts_peripheral = ts_peripheral.copy()
    new_ts_peripheral[list(list(elem is not None for elem in row) for row in new_ts_peripheral)] = \
        sync_peripheral_ts(ts_peripheral, sync_ts_peripheral, sync_ts_central)
    assert len(new_ts_peripheral) == len(ts_peripheral)
    # Reindexing, renaming and compensating time differences for peripheral events
    max_central_id = max([int(i) for i in evt_central.registered_events_types])

    assert len(new_ts_peripheral) == len(evt_peripheral.tracked_events)
    evt_peripheral.tracked_events = list(map(lambda x, y:
                                         TrackedEvent(Event(x.submit.type_id + max_central_id + 1, y[0], x.submit.data),
                                                      y[1],
                                                      y[2]),
                                             evt_peripheral.tracked_events, new_ts_peripheral))

    evt_peripheral.registered_events_types = {k + max_central_id + 1 :
                EventType(v.name + "_peripheral", v.data_types, v.data_descriptions)
                for k, v in evt_peripheral.registered_events_types.items()}

    evt_central.registered_events_types = {
                k : EventType(v.name + "_central",
                              v.data_types, v.data_descriptions)
                for k, v in evt_central.registered_events_types.items()}

    # Filter out events that are out of synchronization period
    TIME_DIFF = 0.5
    start_time = sync_ts_central[0] - TIME_DIFF
    end_time = sync_ts_central[-1] + TIME_DIFF
    evt_peripheral.tracked_events = list(filter(lambda x:
        x.submit.timestamp >= start_time and (x.proc_end_time <= end_time if x.proc_end_time is not None \
            else x.submit.timestamp <= end_time),
        evt_peripheral.tracked_events))

    evt_central.tracked_events = list(filter(lambda x:
        x.submit.timestamp >= start_time and (x.proc_end_time <= end_time if x.proc_end_time is not None \
            else x.submit.timestamp <= end_time),
        evt_central.tracked_events))

    # Filter out events that were out of interpolation range
    evt_peripheral.tracked_events = list(filter(lambda x:
        INTERP_OUT_OF_RANGE_VAL not in (x.submit.timestamp, x.proc_start_time, x.proc_end_time),
        evt_peripheral.tracked_events))

    all_registered_events_types = evt_peripheral.registered_events_types.copy()
    all_registered_events_types.update(evt_central.registered_events_types)

    result_events = ProcessedEvents()
    result_events.tracked_events = evt_peripheral.tracked_events + evt_central.tracked_events
    result_events.registered_events_types = all_registered_events_types

    result_events.write_data_to_files(args.result_dataset + ".csv",
                                      args.result_dataset + ".json")

    print('Profiler data merged successfully')
class StatsNordic():
    def __init__(self, events_filename, events_types_filename, log_lvl):
        self.data_name = events_filename.split('.')[0]
        self.processed_data = ProcessedEvents()
        self.processed_data.read_data_from_files(events_filename, events_types_filename)

        self.logger = logging.getLogger('Stats Nordic')
        self.logger_console = logging.StreamHandler()
        self.logger.setLevel(log_lvl)
        self.log_format = logging.Formatter(
            '[%(levelname)s] %(name)s: %(message)s')
        self.logger_console.setFormatter(self.log_format)
        self.logger.addHandler(self.logger_console)

    def calculate_stats_preset1(self, start_meas, end_meas):
        self.time_between_events("hid_mouse_event_dongle", EventState.SUBMIT,
                                 "hid_report_sent_event_device", EventState.SUBMIT,
                                 0.05, start_meas, end_meas)
        self.time_between_events("hid_mouse_event_dongle", EventState.SUBMIT,
                                 "hid_report_sent_event_device", EventState.SUBMIT,
                                 0.05, start_meas, end_meas)
        self.time_between_events("hid_report_sent_event_dongle", EventState.SUBMIT,
                                 "hid_report_sent_event_dongle", EventState.SUBMIT,
                                 0.05, start_meas, end_meas)
        self.time_between_events("hid_mouse_event_dongle", EventState.SUBMIT,
                                 "hid_report_sent_event_dongle", EventState.SUBMIT,
                                 0.05, start_meas, end_meas)
        self.time_between_events("hid_mouse_event_device", EventState.SUBMIT,
                                 "hid_mouse_event_dongle", EventState.SUBMIT,
                                 0.05, start_meas, end_meas)
        plt.show()

    def _get_timestamps(self, event_name, event_state, start_meas, end_meas):
        event_type_id = self.processed_data.get_event_type_id(event_name)
        if event_type_id is None:
            self.logger.error("Event name not found: " + event_name)
            return None
        if not self.processed_data.is_event_tracked(event_type_id) and event_state != EventState.SUBMIT:
            self.logger.error("This event is not tracked: " + event_name)
            return None

        trackings = list(filter(lambda x:
                      x.submit.type_id == event_type_id,
                      self.processed_data.tracked_events))

        if not isinstance(event_state, EventState):
            self.logger.error("Event state should be EventState enum")
            return None

        if event_state == EventState.SUBMIT:
            timestamps = np.fromiter(map(lambda x: x.submit.timestamp, trackings),
                                     dtype=np.float)
        elif event_state == EventState.PROC_START:
            timestamps = np.fromiter(map(lambda x: x.proc_start_time, trackings),
                                     dtype=np.float)
        elif event_state == EventState.PROC_END:
            timestamps = np.fromiter(map(lambda x: x.proc_end_time, trackings),
                                     dtype=np.float)

        timestamps = timestamps[np.where((timestamps > start_meas)
                                         & (timestamps < end_meas))]

        return timestamps

    @staticmethod
    def calculate_times_between(start_times, end_times):
        if end_times[0] <= start_times[0]:
            end_times = end_times[1:]
        if len(start_times) > len(end_times):
            start_times = start_times[:-1]

        return (end_times - start_times) * 1000

    @staticmethod
    def prepare_stats_txt(times_between):
        stats_text = "Max time: "
        stats_text += "{0:.3f}".format(max(times_between)) + "ms\n"
        stats_text += "Min time: "
        stats_text += "{0:.3f}".format(min(times_between)) + "ms\n"
        stats_text += "Mean time: "
        stats_text += "{0:.3f}".format(np.mean(times_between)) + "ms\n"
        stats_text += "Std dev of time: "
        stats_text += "{0:.3f}".format(np.std(times_between)) + "ms\n"
        stats_text += "Median time: "
        stats_text += "{0:.3f}".format(np.median(times_between)) + "ms\n"
        stats_text += "Number of records: {}".format(len(times_between)) + "\n"

        return stats_text

    def time_between_events(self, start_event_name, start_event_state,
                            end_event_name, end_event_state, hist_bin_width=0.01,
                            start_meas=0, end_meas=float('inf')):
        self.logger.info("Stats calculating: {}->{}".format(start_event_name,
                                                            end_event_name))

        start_times = self._get_timestamps(start_event_name, start_event_state,
                                           start_meas, end_meas)
        end_times = self._get_timestamps(end_event_name, end_event_state,
                                           start_meas, end_meas)

        if start_times is None or end_times is None:
            return

        if len(start_times) == 0:
            self.logger.error("No events logged: " + start_event_name)
            return

        if len(end_times) == 0:
            self.logger.error("No events logged: " + end_event_name)
            return

        if len(start_times) != len(end_times):
            self.logger.error("Number of start_times and end_times is not equal")
            self.logger.error("Got {} start_times and {} end_times".format(
                len(start_times), len(end_times)))

            return

        times_between = self.calculate_times_between(start_times, end_times)
        stats_text = self.prepare_stats_txt(times_between)

        plt.figure()

        ax = plt.gca()
        ax.text(0.05,
                0.95,
                stats_text,
                transform=ax.transAxes,
                fontsize=12,
                verticalalignment='top',
                bbox=dict(boxstyle='round',
                            alpha=0.5,
                            facecolor='linen'))

        plt.xlabel('Duration[ms]')
        plt.ylabel('Number of occurrences')

        event_status_str = {
                        EventState.SUBMIT : "submission",
                        EventState.PROC_START : "processing start",
                        EventState.PROC_END : "processing end"
        }

        title = "From " + start_event_name + ' ' + \
                event_status_str[start_event_state] + "\nto " + \
                end_event_name + ' ' + event_status_str[end_event_state] + \
                ' (' + self.data_name + ')'
        plt.title(title)
        plt.hist(times_between, bins = (int)((max(times_between) - min(times_between))
                                        / hist_bin_width))

        plt.yscale('log')
        plt.grid(True)

        if end_meas == float('inf'):
            end_meas_string = 'inf'
        else:
            end_meas_string = int(end_meas)
        dir_name = "{}{}_{}_{}/".format(OUTPUT_FOLDER, self.data_name,
                                        int(start_meas), end_meas_string)
        if not os.path.exists(dir_name):
            os.makedirs(dir_name)

        plt.savefig(dir_name +
                    title.lower().replace(' ', '_').replace('\n', '_') +'.png')