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online_monitor.py
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online_monitor.py
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#
# ------------------------------------------------------------
# Copyright (c) All rights reserved
# SiLab, Institute of Physics, University of Bonn
# ------------------------------------------------------------
#
import sys
import zmq
import numpy as np
from PyQt4 import Qt
from PyQt4.QtCore import pyqtSlot
import pyqtgraph as pg
from pyqtgraph.Qt import QtCore, QtGui
from pyqtgraph.dockarea import DockArea, Dock
import pyqtgraph.ptime as ptime
from threading import Event
import psutil
class DataWorker(QtCore.QObject):
run_start = QtCore.pyqtSignal()
config_data = QtCore.pyqtSignal(dict)
interpreted_data = QtCore.pyqtSignal(dict)
meta_data = QtCore.pyqtSignal(dict)
finished = QtCore.pyqtSignal()
def __init__(self):
QtCore.QObject.__init__(self)
self.integrate_readouts = 1
self._stop_readout = Event()
self.n_bins = 512
self.hist_range = (0, 2**14)
self.histogram = np.zeros(self.n_bins)
def connect(self, socket_addr):
self.socket_addr = socket_addr
self.context = zmq.Context()
self.socket_pull = self.context.socket(zmq.PULL)
self.socket_pull.setsockopt(zmq.RCVHWM, 10)
self.socket_pull.setsockopt(zmq.LINGER, 500)
self.socket_pull.connect(self.socket_addr)
self.poller = zmq.Poller() # poll needed to be able to return QThread
self.poller.register(self.socket_pull, zmq.POLLIN)
def on_set_integrate_readouts(self, value):
self.integrate_readouts = value
def reset_hist(self):
hist, _ = np.histogram(np.zeros(200), bins=self.n_bins, range=self.hist_range)
self.histogram = hist
# @profile
def process_data(self): # infinite loop via QObject.moveToThread(), does not block event loop
while(not self._stop_readout.wait(0.001)): # use wait(), do not block here
try:
meta_data = self.socket_pull.recv_json(flags=zmq.NOBLOCK)
data = self.socket_pull.recv()
# reconstruct numpy array
buf = buffer(data)
dtype = meta_data.pop('dtype')
shape = meta_data.pop('shape')
threshold = meta_data.pop('thr')
data_array = np.frombuffer(buf, dtype=dtype).reshape(shape)
hist, bin_edges = np.histogram(np.amax(data_array, axis=1), bins=self.n_bins, range=self.hist_range)
self.histogram += hist
#for event_data in data_array:
self.interpreted_data.emit({
"waveform": data_array[0],
"bin_edges": bin_edges,
"histogram": self.histogram,
"threshold": threshold,
"n_actual_events": data_array.shape[0]
})
except zmq.Again:
pass
self.finished.emit()
def stop(self):
self._stop_readout.set()
class OnlineMonitorApplication(QtGui.QMainWindow):
def __init__(self, socket_addr):
super(OnlineMonitorApplication, self).__init__()
self.setup_plots()
self.add_widgets()
self.fps = 0
self.eps = 0 # events per second
self.total_events = 0
self.total_readouts = 0
self.last_total_events = 0
self.updateTime = ptime.time()
self.setup_data_worker_and_start(socket_addr)
self.cpu_load = max(psutil.cpu_percent(percpu=True))
def closeEvent(self, event):
super(OnlineMonitorApplication, self).closeEvent(event)
# wait for thread
self.worker.stop()
self.thread.wait(1) # fixes message: QThread: Destroyed while thread is still running
def setup_data_worker_and_start(self, socket_addr):
self.thread = QtCore.QThread() # no parent
self.worker = DataWorker() # no parent
self.worker.interpreted_data.connect(self.on_interpreted_data)
self.worker.run_start.connect(self.on_run_start)
self.worker.config_data.connect(self.on_config_data)
self.spin_box.valueChanged.connect(self.worker.on_set_integrate_readouts)
self.worker.moveToThread(self.thread)
self.worker.connect(socket_addr)
self.thread.started.connect(self.worker.process_data)
self.worker.finished.connect(self.thread.quit)
self.thread.start()
def setup_plots(self):
pg.setConfigOption('background', 'w')
pg.setConfigOption('foreground', 'k')
def add_widgets(self):
# Main window with dock area
self.dock_area = DockArea()
self.setCentralWidget(self.dock_area)
# Docks
dock_waveform = Dock("Waveform", size=(600, 400))
dock_histogram = Dock("Histogram", size=(600, 400))
dock_status = Dock("Status", size=(1200, 40))
self.dock_area.addDock(dock_waveform, 'left')
self.dock_area.addDock(dock_histogram, 'right', dock_waveform)
self.dock_area.addDock(dock_status, 'top')
# Status widget
cw = QtGui.QWidget()
cw.setStyleSheet("QWidget {background-color:white}")
layout = QtGui.QGridLayout()
layout.setColumnStretch(2, 1)
cw.setLayout(layout)
self.event_rate_label = QtGui.QLabel("Event Rate\n0 Hz")
self.total_events_label = QtGui.QLabel("Total Events\n0")
self.spin_box = Qt.QSpinBox(value=20, maximum=1000)
self.reset_button = Qt.QPushButton('Reset', self)
self.reset_button.clicked.connect(self.reset_plots)
layout.addWidget(self.event_rate_label, 0, 1, 1, 1)
layout.addWidget(self.total_events_label, 1, 1, 1, 1)
layout.addWidget(self.spin_box, 0, 3, 1, 1)
layout.addWidget(self.reset_button, 1, 3, 1, 1)
dock_status.addWidget(cw)
# Different plot docks
waveform_widget = pg.PlotWidget(background="w")
self.waveform_plot = waveform_widget.plot(range(0, 200), np.zeros(shape=(200)))
self.thr_line = pg.InfiniteLine(pos=1000, angle=0, pen={'color':0.0, 'style':QtCore.Qt.DashLine})
waveform_widget.addItem(self.thr_line)
dock_waveform.addWidget(waveform_widget)
histogram_widget = pg.PlotWidget(background="w")
self.histogram_plot = histogram_widget.plot(range(0, 2**14 + 1), np.zeros(shape=(2**14)), stepMode=True)
histogram_widget.showGrid(y=True)
self.thr_line_hist = pg.InfiniteLine(pos=1000, angle=90, pen={'color':0.0, 'style':QtCore.Qt.DashLine})
histogram_widget.addItem(self.thr_line_hist)
dock_histogram.addWidget(histogram_widget)
@pyqtSlot()
def on_run_start(self):
pass
@pyqtSlot(dict)
def on_config_data(self, config_data):
pass
def setup_config_text(self, conf):
pass
@pyqtSlot(dict)
def on_interpreted_data(self, interpreted_data):
self.update_plots(**interpreted_data)
def update_plots(self, waveform, bin_edges, histogram, threshold, n_actual_events):
self.total_events += n_actual_events
self.total_readouts += 1
actual_cpu_load = max(psutil.cpu_percent(percpu=True))
self.cpu_load = 0.95 * self.cpu_load + 0.05 * actual_cpu_load
if self.cpu_load < 55 and self.spin_box.value() > 0 and self.total_readouts % self.spin_box.value() == 0: # only refresh plot every spin_box.value() readout
self.waveform_plot.setData(waveform, fillLevel=0, brush=(0, 0, 255, 150))
self.histogram_plot.setData(x=bin_edges, y=histogram, fillLevel=0, brush=(0, 0, 255, 150))
self.thr_line.setValue(threshold)
self.thr_line_hist.setValue(threshold)
self.update_monitor()
def update_monitor(self):
now = ptime.time()
recent_eps = (self.total_events - self.last_total_events) / (now - self.updateTime)
self.last_total_events = self.total_events
self.updateTime = now
self.eps = self.eps * 0.98 + recent_eps * 0.02
if self.spin_box.value() == 0: # show number of events
self.event_rate_label.setText("Total Events\n%d" % int(self.total_events))
else:
self.event_rate_label.setText("Event Rate\n%d Hz" % int(self.eps))
self.total_events_label.setText("Total Events\n%d" % int(self.total_events))
def reset_plots(self):
self.worker.reset_hist()
self.total_events = 0
self.total_readouts = 0
self.last_total_events = 0
self.updateTime = ptime.time()
self.fps = 0
self.eps = 0 # events per second
self.waveform_plot.setData(x=range(0, 200), y=np.zeros(200), fillLevel=0, brush=(0, 0, 255, 150))
self.histogram_plot.setData(x=range(0, 2**14+1), y=np.zeros(2**14), fillLevel=0, brush=(0, 0, 255, 150))
self.thr_line.setValue(1000)
self.thr_line_hist.setValue(1000)
self.update_monitor()
if __name__ == '__main__':
app = Qt.QApplication(sys.argv)
app.setStyle('cleanlooks')
pid = app.applicationPid()
print pid
win = OnlineMonitorApplication(socket_addr='tcp://127.0.0.1:5678')
#win.resize(800, 840)
win.showMaximized()
win.setWindowTitle('Online Monitor')
win.show()
sys.exit(app.exec_())